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go-sample-webpage
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This commit is contained in:
Kekskurse 2021-11-08 02:25:36 +01:00
parent da114c560b
commit 996f85589b
Signed by: kekskurse
GPG Key ID: 728ACCB59341E7E4
324 changed files with 42173 additions and 10362 deletions
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1
database/migrations/1_initialize_schema.down.sql Normal file
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@ -0,0 +1 @@
DROP TABLE `user`;

6
database/migrations/1_initialize_schema.up.sql Normal file
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@ -0,0 +1,6 @@
CREATE TABLE user (
username VARCHAR(250),
password VARCHAR(250)
);
INSERT INTO `user` (`username`, `password`) VALUES ("test", "test");

13
docker-compose.yml Normal file
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@ -0,0 +1,13 @@
version: "3.9" # optional since v1.27.0
services:
db:
image: mariadb:10.6
ports:
- "3306:3306"
#volumes:
# - ./docker-hdd/msql:/var/lib/mysql
environment:
- "MARIADB_ROOT_PASSWORD=test"
- "MARIADB_DATABASE=test"
- "MARIADB_USER=test"
- "MARIADB_PASSWORD=test"

24
go.mod
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@ -10,19 +10,26 @@ require (
require (
github.com/go-chi/jwtauth/v5 v5.0.2
github.com/golang-migrate/migrate/v4 v4.15.1
github.com/rs/zerolog v1.26.0
github.com/unrolled/render v1.4.0
github.com/urfave/cli/v2 v2.3.0
)
require (
github.com/cpuguy83/go-md2man/v2 v2.0.0 // indirect
github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.0-20210816181553-5444fa50b93d // indirect
github.com/fsnotify/fsnotify v1.4.9 // indirect
github.com/gin-contrib/sse v0.1.0 // indirect
github.com/go-playground/locales v0.13.0 // indirect
github.com/go-playground/universal-translator v0.17.0 // indirect
github.com/go-playground/validator/v10 v10.4.1 // indirect
github.com/go-sql-driver/mysql v1.5.0 // indirect
github.com/goccy/go-json v0.7.6 // indirect
github.com/golang/protobuf v1.3.3 // indirect
github.com/json-iterator/go v1.1.9 // indirect
github.com/golang/protobuf v1.5.2 // indirect
github.com/hashicorp/errwrap v1.0.0 // indirect
github.com/hashicorp/go-multierror v1.1.0 // indirect
github.com/json-iterator/go v1.1.10 // indirect
github.com/leodido/go-urn v1.2.0 // indirect
github.com/lestrrat-go/backoff/v2 v2.0.8 // indirect
github.com/lestrrat-go/blackmagic v1.0.0 // indirect
@ -31,11 +38,14 @@ require (
github.com/lestrrat-go/jwx v1.2.6 // indirect
github.com/lestrrat-go/option v1.0.0 // indirect
github.com/mattn/go-isatty v0.0.12 // indirect
github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 // indirect
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
github.com/modern-go/reflect2 v1.0.1 // indirect
github.com/pkg/errors v0.9.1 // indirect
github.com/russross/blackfriday/v2 v2.0.1 // indirect
github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
github.com/ugorji/go/codec v1.1.7 // indirect
golang.org/x/crypto v0.0.0-20201217014255-9d1352758620 // indirect
golang.org/x/sys v0.0.0-20210525143221-35b2ab0089ea // indirect
gopkg.in/yaml.v2 v2.2.8 // indirect
go.uber.org/atomic v1.6.0 // indirect
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 // indirect
golang.org/x/sys v0.0.0-20211013075003-97ac67df715c // indirect
gopkg.in/yaml.v2 v2.4.0 // indirect
)

1427
go.sum
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File diff suppressed because it is too large Load Diff

89
main.go
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@ -1,23 +1,99 @@
package main
import (
"database/sql"
"embed"
"gin-test/pkg/sample"
"gin-test/pkg/user"
"github.com/go-chi/jwtauth/v5"
"github.com/rs/zerolog/log"
"net/http"
"os"
"github.com/go-chi/chi/v5"
"github.com/go-chi/chi/v5/middleware"
"github.com/golang-migrate/migrate/v4"
"github.com/golang-migrate/migrate/v4/database/mysql"
"github.com/golang-migrate/migrate/v4/source/iofs"
"github.com/unrolled/render"
"github.com/urfave/cli/v2"
)
// content holds our static web server content.
//go:embed static/* templates/*
var webserver embed.FS
//go:embed database/migrations/*.sql
var migrationFS embed.FS
func main() {
app := &cli.App{
Name: "Webpage",
Usage: "Sample Webapplication in golang",
Commands: []*cli.Command{
{
Name: "run",
//Aliases: []string{"c"},
Usage: "Run Webapplication",
Action: func(c *cli.Context) error {
return runWebpage()
},
},
{
Name: "migrate",
//Aliases: []string{"a"},
Usage: "Execute the migrations",
Action: func(c *cli.Context) error {
return runMigration()
},
},
},
}
err := app.Run(os.Args)
if err != nil {
log.Fatal().Err(err).Msg("Cant run application")
}
}
func runMigration() error {
log.Debug().Msg("Start Migration")
db, err := sql.Open("mysql", "root:test@tcp(localhost:3306)/test?multiStatements=true")
if err != nil {
log.Fatal().Err(err).Msg("Cant conect to Database")
}
d, err := iofs.New(migrationFS, "database/migrations")
if err != nil {
log.Fatal().Err(err).Msg("Cant create iofs")
}
driver, err := mysql.WithInstance(db, &mysql.Config{})
if err != nil {
log.Fatal().Err(err).Msg("Cant create driver")
}
m, err := migrate.NewWithInstance(
"iofs", d,
"test", driver)
if err != nil {
log.Fatal().Err(err).Msg("Cant create migration object")
}
err = m.Up()
if err != nil {
log.Error().Err(err).Msg("Cant execute Migrations")
return err
}
log.Info().Msg("Execute Migrations")
return nil
}
func runWebpage() error {
r := chi.NewRouter()
render := render.New(render.Options{
FileSystem: &render.EmbedFileSystem{
@ -32,14 +108,17 @@ func main() {
r.Get("/", func(w http.ResponseWriter, r *http.Request) {
render.HTML(w, http.StatusOK, "index", map[string]string {"title": "Soeren"})
})
tokenAuth := jwtauth.New("HS256", []byte("secret"), nil)
uc := user.GetUserClient()
sample.Register(r)
user.Register(r)
user.Register(r, tokenAuth, uc)
})
http.ListenAndServe(":3000", r)
http.ListenAndServe(":3000", r) //todo; handle this error
return nil
}

9
pkg/user/user.go
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@ -19,7 +19,9 @@ var ren *render.Render
var tokenAuth *jwtauth.JWTAuth
func Register(router chi.Router) {
var uc *UserClient
func Register(router chi.Router, token *jwtauth.JWTAuth, userClient UserClient) {
ren = render.New(render.Options{
//Layout: "layout",
FileSystem: &render.EmbedFileSystem{
@ -33,7 +35,9 @@ func Register(router chi.Router) {
router.Post("/register", register)
router.Get("/logout", logout)
tokenAuth = jwtauth.New("HS256", []byte("secret"), nil)
//tokenAuth = jwtauth.New("HS256", []byte("secret"), nil)
tokenAuth = token
uc = &userClient
router.Group(func(r chi.Router) {
r.Use(jwtauth.Verifier(tokenAuth))
@ -88,7 +92,6 @@ func logout(w http.ResponseWriter, r *http.Request) {
func register(w http.ResponseWriter, r *http.Request) {
r.ParseForm()
uc := GetUserClient()
res, _ := uc.register(r.FormValue("username"), r.FormValue("password"))
if res {

5
pkg/user/user_test.go
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@ -2,6 +2,7 @@ package user
import (
"github.com/go-chi/chi/v5"
"github.com/go-chi/jwtauth/v5"
"io"
"net/http/httptest"
"testing"
@ -12,7 +13,9 @@ func TestGetLoginForm(t *testing.T) {
rec := httptest.NewRecorder()
router := chi.NewRouter()
router.Group(func(r chi.Router) {
Register(r)
tokenAuth := jwtauth.New("HS256", []byte("secret"), nil)
uc := GetUserClient()
Register(r, tokenAuth, uc)
})
loginForm(rec, req)

13
readme.md
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@ -1,5 +1,12 @@
Test für das entwickeln von Monolith webanwendung mit html gui in go.
## Including Packages
* https://github.com/go-chi/chi -> Routing and middelware
* https://github.com/go-chi/jwtauth -> For JWT Auth
* https://github.com/golang-migrate/migrate -> for mysql migration
* https://github.com/urfave/cli -> for cli commands like migration
Test für das entwickeln von Monolith webanwendung mit html gui in go.
Es gibt unabhängige packages im pkg ordner die eine oder mehrere seiten beinhalten können. Jedes pkg beinhaltet alles um funktionieren zu können.
@ -9,6 +16,6 @@ Alles ist in einem binary
next steps:
* auth über mehrer pkg sharen z.b. durch config object statt chi router in die Register funktion reichen
* mysql migrationen oder andere datenbank für user einbauen
* conifg per env
* makefile
* ci/Cd bis docker image bauen

21
vendor/github.com/cpuguy83/go-md2man/v2/LICENSE.md generated vendored Normal file
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@ -0,0 +1,21 @@
The MIT License (MIT)
Copyright (c) 2014 Brian Goff
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

14
vendor/github.com/cpuguy83/go-md2man/v2/md2man/md2man.go generated vendored Normal file
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@ -0,0 +1,14 @@
package md2man
import (
"github.com/russross/blackfriday/v2"
)
// Render converts a markdown document into a roff formatted document.
func Render(doc []byte) []byte {
renderer := NewRoffRenderer()
return blackfriday.Run(doc,
[]blackfriday.Option{blackfriday.WithRenderer(renderer),
blackfriday.WithExtensions(renderer.GetExtensions())}...)
}

345
vendor/github.com/cpuguy83/go-md2man/v2/md2man/roff.go generated vendored Normal file
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@ -0,0 +1,345 @@
package md2man
import (
"fmt"
"io"
"os"
"strings"
"github.com/russross/blackfriday/v2"
)
// roffRenderer implements the blackfriday.Renderer interface for creating
// roff format (manpages) from markdown text
type roffRenderer struct {
extensions blackfriday.Extensions
listCounters []int
firstHeader bool
defineTerm bool
listDepth int
}
const (
titleHeader = ".TH "
topLevelHeader = "\n\n.SH "
secondLevelHdr = "\n.SH "
otherHeader = "\n.SS "
crTag = "\n"
emphTag = "\\fI"
emphCloseTag = "\\fP"
strongTag = "\\fB"
strongCloseTag = "\\fP"
breakTag = "\n.br\n"
paraTag = "\n.PP\n"
hruleTag = "\n.ti 0\n\\l'\\n(.lu'\n"
linkTag = "\n\\[la]"
linkCloseTag = "\\[ra]"
codespanTag = "\\fB\\fC"
codespanCloseTag = "\\fR"
codeTag = "\n.PP\n.RS\n\n.nf\n"
codeCloseTag = "\n.fi\n.RE\n"
quoteTag = "\n.PP\n.RS\n"
quoteCloseTag = "\n.RE\n"
listTag = "\n.RS\n"
listCloseTag = "\n.RE\n"
arglistTag = "\n.TP\n"
tableStart = "\n.TS\nallbox;\n"
tableEnd = ".TE\n"
tableCellStart = "T{\n"
tableCellEnd = "\nT}\n"
)
// NewRoffRenderer creates a new blackfriday Renderer for generating roff documents
// from markdown
func NewRoffRenderer() *roffRenderer { // nolint: golint
var extensions blackfriday.Extensions
extensions |= blackfriday.NoIntraEmphasis
extensions |= blackfriday.Tables
extensions |= blackfriday.FencedCode
extensions |= blackfriday.SpaceHeadings
extensions |= blackfriday.Footnotes
extensions |= blackfriday.Titleblock
extensions |= blackfriday.DefinitionLists
return &roffRenderer{
extensions: extensions,
}
}
// GetExtensions returns the list of extensions used by this renderer implementation
func (r *roffRenderer) GetExtensions() blackfriday.Extensions {
return r.extensions
}
// RenderHeader handles outputting the header at document start
func (r *roffRenderer) RenderHeader(w io.Writer, ast *blackfriday.Node) {
// disable hyphenation
out(w, ".nh\n")
}
// RenderFooter handles outputting the footer at the document end; the roff
// renderer has no footer information
func (r *roffRenderer) RenderFooter(w io.Writer, ast *blackfriday.Node) {
}
// RenderNode is called for each node in a markdown document; based on the node
// type the equivalent roff output is sent to the writer
func (r *roffRenderer) RenderNode(w io.Writer, node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
var walkAction = blackfriday.GoToNext
switch node.Type {
case blackfriday.Text:
r.handleText(w, node, entering)
case blackfriday.Softbreak:
out(w, crTag)
case blackfriday.Hardbreak:
out(w, breakTag)
case blackfriday.Emph:
if entering {
out(w, emphTag)
} else {
out(w, emphCloseTag)
}
case blackfriday.Strong:
if entering {
out(w, strongTag)
} else {
out(w, strongCloseTag)
}
case blackfriday.Link:
if !entering {
out(w, linkTag+string(node.LinkData.Destination)+linkCloseTag)
}
case blackfriday.Image:
// ignore images
walkAction = blackfriday.SkipChildren
case blackfriday.Code:
out(w, codespanTag)
escapeSpecialChars(w, node.Literal)
out(w, codespanCloseTag)
case blackfriday.Document:
break
case blackfriday.Paragraph:
// roff .PP markers break lists
if r.listDepth > 0 {
return blackfriday.GoToNext
}
if entering {
out(w, paraTag)
} else {
out(w, crTag)
}
case blackfriday.BlockQuote:
if entering {
out(w, quoteTag)
} else {
out(w, quoteCloseTag)
}
case blackfriday.Heading:
r.handleHeading(w, node, entering)
case blackfriday.HorizontalRule:
out(w, hruleTag)
case blackfriday.List:
r.handleList(w, node, entering)
case blackfriday.Item:
r.handleItem(w, node, entering)
case blackfriday.CodeBlock:
out(w, codeTag)
escapeSpecialChars(w, node.Literal)
out(w, codeCloseTag)
case blackfriday.Table:
r.handleTable(w, node, entering)
case blackfriday.TableCell:
r.handleTableCell(w, node, entering)
case blackfriday.TableHead:
case blackfriday.TableBody:
case blackfriday.TableRow:
// no action as cell entries do all the nroff formatting
return blackfriday.GoToNext
default:
fmt.Fprintln(os.Stderr, "WARNING: go-md2man does not handle node type "+node.Type.String())
}
return walkAction
}
func (r *roffRenderer) handleText(w io.Writer, node *blackfriday.Node, entering bool) {
var (
start, end string
)
// handle special roff table cell text encapsulation
if node.Parent.Type == blackfriday.TableCell {
if len(node.Literal) > 30 {
start = tableCellStart
end = tableCellEnd
} else {
// end rows that aren't terminated by "tableCellEnd" with a cr if end of row
if node.Parent.Next == nil && !node.Parent.IsHeader {
end = crTag
}
}
}
out(w, start)
escapeSpecialChars(w, node.Literal)
out(w, end)
}
func (r *roffRenderer) handleHeading(w io.Writer, node *blackfriday.Node, entering bool) {
if entering {
switch node.Level {
case 1:
if !r.firstHeader {
out(w, titleHeader)
r.firstHeader = true
break
}
out(w, topLevelHeader)
case 2:
out(w, secondLevelHdr)
default:
out(w, otherHeader)
}
}
}
func (r *roffRenderer) handleList(w io.Writer, node *blackfriday.Node, entering bool) {
openTag := listTag
closeTag := listCloseTag
if node.ListFlags&blackfriday.ListTypeDefinition != 0 {
// tags for definition lists handled within Item node
openTag = ""
closeTag = ""
}
if entering {
r.listDepth++
if node.ListFlags&blackfriday.ListTypeOrdered != 0 {
r.listCounters = append(r.listCounters, 1)
}
out(w, openTag)
} else {
if node.ListFlags&blackfriday.ListTypeOrdered != 0 {
r.listCounters = r.listCounters[:len(r.listCounters)-1]
}
out(w, closeTag)
r.listDepth--
}
}
func (r *roffRenderer) handleItem(w io.Writer, node *blackfriday.Node, entering bool) {
if entering {
if node.ListFlags&blackfriday.ListTypeOrdered != 0 {
out(w, fmt.Sprintf(".IP \"%3d.\" 5\n", r.listCounters[len(r.listCounters)-1]))
r.listCounters[len(r.listCounters)-1]++
} else if node.ListFlags&blackfriday.ListTypeDefinition != 0 {
// state machine for handling terms and following definitions
// since blackfriday does not distinguish them properly, nor
// does it seperate them into separate lists as it should
if !r.defineTerm {
out(w, arglistTag)
r.defineTerm = true
} else {
r.defineTerm = false
}
} else {
out(w, ".IP \\(bu 2\n")
}
} else {
out(w, "\n")
}
}
func (r *roffRenderer) handleTable(w io.Writer, node *blackfriday.Node, entering bool) {
if entering {
out(w, tableStart)
//call walker to count cells (and rows?) so format section can be produced
columns := countColumns(node)
out(w, strings.Repeat("l ", columns)+"\n")
out(w, strings.Repeat("l ", columns)+".\n")
} else {
out(w, tableEnd)
}
}
func (r *roffRenderer) handleTableCell(w io.Writer, node *blackfriday.Node, entering bool) {
var (
start, end string
)
if node.IsHeader {
start = codespanTag
end = codespanCloseTag
}
if entering {
if node.Prev != nil && node.Prev.Type == blackfriday.TableCell {
out(w, "\t"+start)
} else {
out(w, start)
}
} else {
// need to carriage return if we are at the end of the header row
if node.IsHeader && node.Next == nil {
end = end + crTag
}
out(w, end)
}
}
// because roff format requires knowing the column count before outputting any table
// data we need to walk a table tree and count the columns
func countColumns(node *blackfriday.Node) int {
var columns int
node.Walk(func(node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
switch node.Type {
case blackfriday.TableRow:
if !entering {
return blackfriday.Terminate
}
case blackfriday.TableCell:
if entering {
columns++
}
default:
}
return blackfriday.GoToNext
})
return columns
}
func out(w io.Writer, output string) {
io.WriteString(w, output) // nolint: errcheck
}
func needsBackslash(c byte) bool {
for _, r := range []byte("-_&\\~") {
if c == r {
return true
}
}
return false
}
func escapeSpecialChars(w io.Writer, text []byte) {
for i := 0; i < len(text); i++ {
// escape initial apostrophe or period
if len(text) >= 1 && (text[0] == '\'' || text[0] == '.') {
out(w, "\\&")
}
// directly copy normal characters
org := i
for i < len(text) && !needsBackslash(text[i]) {
i++
}
if i > org {
w.Write(text[org:i]) // nolint: errcheck
}
// escape a character
if i >= len(text) {
break
}
w.Write([]byte{'\\', text[i]}) // nolint: errcheck
}
}

9
vendor/github.com/go-sql-driver/mysql/.gitignore generated vendored Normal file
View File

@ -0,0 +1,9 @@
.DS_Store
.DS_Store?
._*
.Spotlight-V100
.Trashes
Icon?
ehthumbs.db
Thumbs.db
.idea

129
vendor/github.com/go-sql-driver/mysql/.travis.yml generated vendored Normal file
View File

@ -0,0 +1,129 @@
sudo: false
language: go
go:
- 1.10.x
- 1.11.x
- 1.12.x
- 1.13.x
- master
before_install:
- go get golang.org/x/tools/cmd/cover
- go get github.com/mattn/goveralls
before_script:
- echo -e "[server]\ninnodb_log_file_size=256MB\ninnodb_buffer_pool_size=512MB\nmax_allowed_packet=16MB" | sudo tee -a /etc/mysql/my.cnf
- sudo service mysql restart
- .travis/wait_mysql.sh
- mysql -e 'create database gotest;'
matrix:
include:
- env: DB=MYSQL8
sudo: required
dist: trusty
go: 1.10.x
services:
- docker
before_install:
- go get golang.org/x/tools/cmd/cover
- go get github.com/mattn/goveralls
- docker pull mysql:8.0
- docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
mysql:8.0 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB --local-infile=1
- cp .travis/docker.cnf ~/.my.cnf
- .travis/wait_mysql.sh
before_script:
- export MYSQL_TEST_USER=gotest
- export MYSQL_TEST_PASS=secret
- export MYSQL_TEST_ADDR=127.0.0.1:3307
- export MYSQL_TEST_CONCURRENT=1
- env: DB=MYSQL57
sudo: required
dist: trusty
go: 1.10.x
services:
- docker
before_install:
- go get golang.org/x/tools/cmd/cover
- go get github.com/mattn/goveralls
- docker pull mysql:5.7
- docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
mysql:5.7 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB --local-infile=1
- cp .travis/docker.cnf ~/.my.cnf
- .travis/wait_mysql.sh
before_script:
- export MYSQL_TEST_USER=gotest
- export MYSQL_TEST_PASS=secret
- export MYSQL_TEST_ADDR=127.0.0.1:3307
- export MYSQL_TEST_CONCURRENT=1
- env: DB=MARIA55
sudo: required
dist: trusty
go: 1.10.x
services:
- docker
before_install:
- go get golang.org/x/tools/cmd/cover
- go get github.com/mattn/goveralls
- docker pull mariadb:5.5
- docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
mariadb:5.5 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB --local-infile=1
- cp .travis/docker.cnf ~/.my.cnf
- .travis/wait_mysql.sh
before_script:
- export MYSQL_TEST_USER=gotest
- export MYSQL_TEST_PASS=secret
- export MYSQL_TEST_ADDR=127.0.0.1:3307
- export MYSQL_TEST_CONCURRENT=1
- env: DB=MARIA10_1
sudo: required
dist: trusty
go: 1.10.x
services:
- docker
before_install:
- go get golang.org/x/tools/cmd/cover
- go get github.com/mattn/goveralls
- docker pull mariadb:10.1
- docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
mariadb:10.1 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB --local-infile=1
- cp .travis/docker.cnf ~/.my.cnf
- .travis/wait_mysql.sh
before_script:
- export MYSQL_TEST_USER=gotest
- export MYSQL_TEST_PASS=secret
- export MYSQL_TEST_ADDR=127.0.0.1:3307
- export MYSQL_TEST_CONCURRENT=1
- os: osx
osx_image: xcode10.1
addons:
homebrew:
packages:
- mysql
update: true
go: 1.12.x
before_install:
- go get golang.org/x/tools/cmd/cover
- go get github.com/mattn/goveralls
before_script:
- echo -e "[server]\ninnodb_log_file_size=256MB\ninnodb_buffer_pool_size=512MB\nmax_allowed_packet=16MB\nlocal_infile=1" >> /usr/local/etc/my.cnf
- mysql.server start
- mysql -uroot -e 'CREATE USER gotest IDENTIFIED BY "secret"'
- mysql -uroot -e 'GRANT ALL ON *.* TO gotest'
- mysql -uroot -e 'create database gotest;'
- export MYSQL_TEST_USER=gotest
- export MYSQL_TEST_PASS=secret
- export MYSQL_TEST_ADDR=127.0.0.1:3306
- export MYSQL_TEST_CONCURRENT=1
script:
- go test -v -covermode=count -coverprofile=coverage.out
- go vet ./...
- .travis/gofmt.sh
after_script:
- $HOME/gopath/bin/goveralls -coverprofile=coverage.out -service=travis-ci

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# This is the official list of Go-MySQL-Driver authors for copyright purposes.
# If you are submitting a patch, please add your name or the name of the
# organization which holds the copyright to this list in alphabetical order.
# Names should be added to this file as
# Name <email address>
# The email address is not required for organizations.
# Please keep the list sorted.
# Individual Persons
Aaron Hopkins <go-sql-driver at die.net>
Achille Roussel <achille.roussel at gmail.com>
Alexey Palazhchenko <alexey.palazhchenko at gmail.com>
Andrew Reid <andrew.reid at tixtrack.com>
Arne Hormann <arnehormann at gmail.com>
Asta Xie <xiemengjun at gmail.com>
Bulat Gaifullin <gaifullinbf at gmail.com>
Carlos Nieto <jose.carlos at menteslibres.net>
Chris Moos <chris at tech9computers.com>
Craig Wilson <craiggwilson at gmail.com>
Daniel Montoya <dsmontoyam at gmail.com>
Daniel Nichter <nil at codenode.com>
Daniël van Eeden <git at myname.nl>
Dave Protasowski <dprotaso at gmail.com>
DisposaBoy <disposaboy at dby.me>
Egor Smolyakov <egorsmkv at gmail.com>
Erwan Martin <hello at erwan.io>
Evan Shaw <evan at vendhq.com>
Frederick Mayle <frederickmayle at gmail.com>
Gustavo Kristic <gkristic at gmail.com>
Hajime Nakagami <nakagami at gmail.com>
Hanno Braun <mail at hannobraun.com>
Henri Yandell <flamefew at gmail.com>
Hirotaka Yamamoto <ymmt2005 at gmail.com>
Huyiguang <hyg at webterren.com>
ICHINOSE Shogo <shogo82148 at gmail.com>
Ilia Cimpoes <ichimpoesh at gmail.com>
INADA Naoki <songofacandy at gmail.com>
Jacek Szwec <szwec.jacek at gmail.com>
James Harr <james.harr at gmail.com>
Jeff Hodges <jeff at somethingsimilar.com>
Jeffrey Charles <jeffreycharles at gmail.com>
Jerome Meyer <jxmeyer at gmail.com>
Jiajia Zhong <zhong2plus at gmail.com>
Jian Zhen <zhenjl at gmail.com>
Joshua Prunier <joshua.prunier at gmail.com>
Julien Lefevre <julien.lefevr at gmail.com>
Julien Schmidt <go-sql-driver at julienschmidt.com>
Justin Li <jli at j-li.net>
Justin Nuß <nuss.justin at gmail.com>
Kamil Dziedzic <kamil at klecza.pl>
Kevin Malachowski <kevin at chowski.com>
Kieron Woodhouse <kieron.woodhouse at infosum.com>
Lennart Rudolph <lrudolph at hmc.edu>
Leonardo YongUk Kim <dalinaum at gmail.com>
Linh Tran Tuan <linhduonggnu at gmail.com>
Lion Yang <lion at aosc.xyz>
Luca Looz <luca.looz92 at gmail.com>
Lucas Liu <extrafliu at gmail.com>
Luke Scott <luke at webconnex.com>
Maciej Zimnoch <maciej.zimnoch at codilime.com>
Michael Woolnough <michael.woolnough at gmail.com>
Nathanial Murphy <nathanial.murphy at gmail.com>
Nicola Peduzzi <thenikso at gmail.com>
Olivier Mengué <dolmen at cpan.org>
oscarzhao <oscarzhaosl at gmail.com>
Paul Bonser <misterpib at gmail.com>
Peter Schultz <peter.schultz at classmarkets.com>
Rebecca Chin <rchin at pivotal.io>
Reed Allman <rdallman10 at gmail.com>
Richard Wilkes <wilkes at me.com>
Robert Russell <robert at rrbrussell.com>
Runrioter Wung <runrioter at gmail.com>
Shuode Li <elemount at qq.com>
Simon J Mudd <sjmudd at pobox.com>
Soroush Pour <me at soroushjp.com>
Stan Putrya <root.vagner at gmail.com>
Stanley Gunawan <gunawan.stanley at gmail.com>
Steven Hartland <steven.hartland at multiplay.co.uk>
Thomas Wodarek <wodarekwebpage at gmail.com>
Tim Ruffles <timruffles at gmail.com>
Tom Jenkinson <tom at tjenkinson.me>
Vladimir Kovpak <cn007b at gmail.com>
Xiangyu Hu <xiangyu.hu at outlook.com>
Xiaobing Jiang <s7v7nislands at gmail.com>
Xiuming Chen <cc at cxm.cc>
Zhenye Xie <xiezhenye at gmail.com>
# Organizations
Barracuda Networks, Inc.
Counting Ltd.
DigitalOcean Inc.
Facebook Inc.
GitHub Inc.
Google Inc.
InfoSum Ltd.
Keybase Inc.
Multiplay Ltd.
Percona LLC
Pivotal Inc.
Stripe Inc.

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## Version 1.5 (2020-01-07)
Changes:
- Dropped support Go 1.9 and lower (#823, #829, #886, #1016, #1017)
- Improve buffer handling (#890)
- Document potentially insecure TLS configs (#901)
- Use a double-buffering scheme to prevent data races (#943)
- Pass uint64 values without converting them to string (#838, #955)
- Update collations and make utf8mb4 default (#877, #1054)
- Make NullTime compatible with sql.NullTime in Go 1.13+ (#995)
- Removed CloudSQL support (#993, #1007)
- Add Go Module support (#1003)
New Features:
- Implement support of optional TLS (#900)
- Check connection liveness (#934, #964, #997, #1048, #1051, #1052)
- Implement Connector Interface (#941, #958, #1020, #1035)
Bugfixes:
- Mark connections as bad on error during ping (#875)
- Mark connections as bad on error during dial (#867)
- Fix connection leak caused by rapid context cancellation (#1024)
- Mark connections as bad on error during Conn.Prepare (#1030)
## Version 1.4.1 (2018-11-14)
Bugfixes:
- Fix TIME format for binary columns (#818)
- Fix handling of empty auth plugin names (#835)
- Fix caching_sha2_password with empty password (#826)
- Fix canceled context broke mysqlConn (#862)
- Fix OldAuthSwitchRequest support (#870)
- Fix Auth Response packet for cleartext password (#887)
## Version 1.4 (2018-06-03)
Changes:
- Documentation fixes (#530, #535, #567)
- Refactoring (#575, #579, #580, #581, #603, #615, #704)
- Cache column names (#444)
- Sort the DSN parameters in DSNs generated from a config (#637)
- Allow native password authentication by default (#644)
- Use the default port if it is missing in the DSN (#668)
- Removed the `strict` mode (#676)
- Do not query `max_allowed_packet` by default (#680)
- Dropped support Go 1.6 and lower (#696)
- Updated `ConvertValue()` to match the database/sql/driver implementation (#760)
- Document the usage of `0000-00-00T00:00:00` as the time.Time zero value (#783)
- Improved the compatibility of the authentication system (#807)
New Features:
- Multi-Results support (#537)
- `rejectReadOnly` DSN option (#604)
- `context.Context` support (#608, #612, #627, #761)
- Transaction isolation level support (#619, #744)
- Read-Only transactions support (#618, #634)
- `NewConfig` function which initializes a config with default values (#679)
- Implemented the `ColumnType` interfaces (#667, #724)
- Support for custom string types in `ConvertValue` (#623)
- Implemented `NamedValueChecker`, improving support for uint64 with high bit set (#690, #709, #710)
- `caching_sha2_password` authentication plugin support (#794, #800, #801, #802)
- Implemented `driver.SessionResetter` (#779)
- `sha256_password` authentication plugin support (#808)
Bugfixes:
- Use the DSN hostname as TLS default ServerName if `tls=true` (#564, #718)
- Fixed LOAD LOCAL DATA INFILE for empty files (#590)
- Removed columns definition cache since it sometimes cached invalid data (#592)
- Don't mutate registered TLS configs (#600)
- Make RegisterTLSConfig concurrency-safe (#613)
- Handle missing auth data in the handshake packet correctly (#646)
- Do not retry queries when data was written to avoid data corruption (#302, #736)
- Cache the connection pointer for error handling before invalidating it (#678)
- Fixed imports for appengine/cloudsql (#700)
- Fix sending STMT_LONG_DATA for 0 byte data (#734)
- Set correct capacity for []bytes read from length-encoded strings (#766)
- Make RegisterDial concurrency-safe (#773)
## Version 1.3 (2016-12-01)
Changes:
- Go 1.1 is no longer supported
- Use decimals fields in MySQL to format time types (#249)
- Buffer optimizations (#269)
- TLS ServerName defaults to the host (#283)
- Refactoring (#400, #410, #437)
- Adjusted documentation for second generation CloudSQL (#485)
- Documented DSN system var quoting rules (#502)
- Made statement.Close() calls idempotent to avoid errors in Go 1.6+ (#512)
New Features:
- Enable microsecond resolution on TIME, DATETIME and TIMESTAMP (#249)
- Support for returning table alias on Columns() (#289, #359, #382)
- Placeholder interpolation, can be actived with the DSN parameter `interpolateParams=true` (#309, #318, #490)
- Support for uint64 parameters with high bit set (#332, #345)
- Cleartext authentication plugin support (#327)
- Exported ParseDSN function and the Config struct (#403, #419, #429)
- Read / Write timeouts (#401)
- Support for JSON field type (#414)
- Support for multi-statements and multi-results (#411, #431)
- DSN parameter to set the driver-side max_allowed_packet value manually (#489)
- Native password authentication plugin support (#494, #524)
Bugfixes:
- Fixed handling of queries without columns and rows (#255)
- Fixed a panic when SetKeepAlive() failed (#298)
- Handle ERR packets while reading rows (#321)
- Fixed reading NULL length-encoded integers in MySQL 5.6+ (#349)
- Fixed absolute paths support in LOAD LOCAL DATA INFILE (#356)
- Actually zero out bytes in handshake response (#378)
- Fixed race condition in registering LOAD DATA INFILE handler (#383)
- Fixed tests with MySQL 5.7.9+ (#380)
- QueryUnescape TLS config names (#397)
- Fixed "broken pipe" error by writing to closed socket (#390)
- Fixed LOAD LOCAL DATA INFILE buffering (#424)
- Fixed parsing of floats into float64 when placeholders are used (#434)
- Fixed DSN tests with Go 1.7+ (#459)
- Handle ERR packets while waiting for EOF (#473)
- Invalidate connection on error while discarding additional results (#513)
- Allow terminating packets of length 0 (#516)
## Version 1.2 (2014-06-03)
Changes:
- We switched back to a "rolling release". `go get` installs the current master branch again
- Version v1 of the driver will not be maintained anymore. Go 1.0 is no longer supported by this driver
- Exported errors to allow easy checking from application code
- Enabled TCP Keepalives on TCP connections
- Optimized INFILE handling (better buffer size calculation, lazy init, ...)
- The DSN parser also checks for a missing separating slash
- Faster binary date / datetime to string formatting
- Also exported the MySQLWarning type
- mysqlConn.Close returns the first error encountered instead of ignoring all errors
- writePacket() automatically writes the packet size to the header
- readPacket() uses an iterative approach instead of the recursive approach to merge splitted packets
New Features:
- `RegisterDial` allows the usage of a custom dial function to establish the network connection
- Setting the connection collation is possible with the `collation` DSN parameter. This parameter should be preferred over the `charset` parameter
- Logging of critical errors is configurable with `SetLogger`
- Google CloudSQL support
Bugfixes:
- Allow more than 32 parameters in prepared statements
- Various old_password fixes
- Fixed TestConcurrent test to pass Go's race detection
- Fixed appendLengthEncodedInteger for large numbers
- Renamed readLengthEnodedString to readLengthEncodedString and skipLengthEnodedString to skipLengthEncodedString (fixed typo)
## Version 1.1 (2013-11-02)
Changes:
- Go-MySQL-Driver now requires Go 1.1
- Connections now use the collation `utf8_general_ci` by default. Adding `&charset=UTF8` to the DSN should not be necessary anymore
- Made closing rows and connections error tolerant. This allows for example deferring rows.Close() without checking for errors
- `[]byte(nil)` is now treated as a NULL value. Before, it was treated like an empty string / `[]byte("")`
- DSN parameter values must now be url.QueryEscape'ed. This allows text values to contain special characters, such as '&'.
- Use the IO buffer also for writing. This results in zero allocations (by the driver) for most queries
- Optimized the buffer for reading
- stmt.Query now caches column metadata
- New Logo
- Changed the copyright header to include all contributors
- Improved the LOAD INFILE documentation
- The driver struct is now exported to make the driver directly accessible
- Refactored the driver tests
- Added more benchmarks and moved all to a separate file
- Other small refactoring
New Features:
- Added *old_passwords* support: Required in some cases, but must be enabled by adding `allowOldPasswords=true` to the DSN since it is insecure
- Added a `clientFoundRows` parameter: Return the number of matching rows instead of the number of rows changed on UPDATEs
- Added TLS/SSL support: Use a TLS/SSL encrypted connection to the server. Custom TLS configs can be registered and used
Bugfixes:
- Fixed MySQL 4.1 support: MySQL 4.1 sends packets with lengths which differ from the specification
- Convert to DB timezone when inserting `time.Time`
- Splitted packets (more than 16MB) are now merged correctly
- Fixed false positive `io.EOF` errors when the data was fully read
- Avoid panics on reuse of closed connections
- Fixed empty string producing false nil values
- Fixed sign byte for positive TIME fields
## Version 1.0 (2013-05-14)
Initial Release

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Mozilla Public License Version 2.0
==================================
1. Definitions
--------------
1.1. "Contributor"
means each individual or legal entity that creates, contributes to
the creation of, or owns Covered Software.
1.2. "Contributor Version"
means the combination of the Contributions of others (if any) used
by a Contributor and that particular Contributor's Contribution.
1.3. "Contribution"
means Covered Software of a particular Contributor.
1.4. "Covered Software"
means Source Code Form to which the initial Contributor has attached
the notice in Exhibit A, the Executable Form of such Source Code
Form, and Modifications of such Source Code Form, in each case
including portions thereof.
1.5. "Incompatible With Secondary Licenses"
means
(a) that the initial Contributor has attached the notice described
in Exhibit B to the Covered Software; or
(b) that the Covered Software was made available under the terms of
version 1.1 or earlier of the License, but not also under the
terms of a Secondary License.
1.6. "Executable Form"
means any form of the work other than Source Code Form.
1.7. "Larger Work"
means a work that combines Covered Software with other material, in
a separate file or files, that is not Covered Software.
1.8. "License"
means this document.
1.9. "Licensable"
means having the right to grant, to the maximum extent possible,
whether at the time of the initial grant or subsequently, any and
all of the rights conveyed by this License.
1.10. "Modifications"
means any of the following:
(a) any file in Source Code Form that results from an addition to,
deletion from, or modification of the contents of Covered
Software; or
(b) any new file in Source Code Form that contains any Covered
Software.
1.11. "Patent Claims" of a Contributor
means any patent claim(s), including without limitation, method,
process, and apparatus claims, in any patent Licensable by such
Contributor that would be infringed, but for the grant of the
License, by the making, using, selling, offering for sale, having
made, import, or transfer of either its Contributions or its
Contributor Version.
1.12. "Secondary License"
means either the GNU General Public License, Version 2.0, the GNU
Lesser General Public License, Version 2.1, the GNU Affero General
Public License, Version 3.0, or any later versions of those
licenses.
1.13. "Source Code Form"
means the form of the work preferred for making modifications.
1.14. "You" (or "Your")
means an individual or a legal entity exercising rights under this
License. For legal entities, "You" includes any entity that
controls, is controlled by, or is under common control with You. For
purposes of this definition, "control" means (a) the power, direct
or indirect, to cause the direction or management of such entity,
whether by contract or otherwise, or (b) ownership of more than
fifty percent (50%) of the outstanding shares or beneficial
ownership of such entity.
2. License Grants and Conditions
--------------------------------
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
(a) under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or
as part of a Larger Work; and
(b) under Patent Claims of such Contributor to make, use, sell, offer
for sale, have made, import, and otherwise transfer either its
Contributions or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution
become effective for each Contribution on the date the Contributor first
distributes such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under
this License. No additional rights or licenses will be implied from the
distribution or licensing of Covered Software under this License.
Notwithstanding Section 2.1(b) above, no patent license is granted by a
Contributor:
(a) for any code that a Contributor has removed from Covered Software;
or
(b) for infringements caused by: (i) Your and any other third party's
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
(c) under Patent Claims infringed by Covered Software in the absence of
its Contributions.
This License does not grant any rights in the trademarks, service marks,
or logos of any Contributor (except as may be necessary to comply with
the notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this
License (see Section 10.2) or under the terms of a Secondary License (if
permitted under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its
Contributions are its original creation(s) or it has sufficient rights
to grant the rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under
applicable copyright doctrines of fair use, fair dealing, or other
equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
in Section 2.1.
3. Responsibilities
-------------------
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under
the terms of this License. You must inform recipients that the Source
Code Form of the Covered Software is governed by the terms of this
License, and how they can obtain a copy of this License. You may not
attempt to alter or restrict the recipients' rights in the Source Code
Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
(a) such Covered Software must also be made available in Source Code
Form, as described in Section 3.1, and You must inform recipients of
the Executable Form how they can obtain a copy of such Source Code
Form by reasonable means in a timely manner, at a charge no more
than the cost of distribution to the recipient; and
(b) You may distribute such Executable Form under the terms of this
License, or sublicense it under different terms, provided that the
license for the Executable Form does not attempt to limit or alter
the recipients' rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for
the Covered Software. If the Larger Work is a combination of Covered
Software with a work governed by one or more Secondary Licenses, and the
Covered Software is not Incompatible With Secondary Licenses, this
License permits You to additionally distribute such Covered Software
under the terms of such Secondary License(s), so that the recipient of
the Larger Work may, at their option, further distribute the Covered
Software under the terms of either this License or such Secondary
License(s).
3.4. Notices
You may not remove or alter the substance of any license notices
(including copyright notices, patent notices, disclaimers of warranty,
or limitations of liability) contained within the Source Code Form of
the Covered Software, except that You may alter any license notices to
the extent required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on
behalf of any Contributor. You must make it absolutely clear that any
such warranty, support, indemnity, or liability obligation is offered by
You alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
---------------------------------------------------
If it is impossible for You to comply with any of the terms of this
License with respect to some or all of the Covered Software due to
statute, judicial order, or regulation then You must: (a) comply with
the terms of this License to the maximum extent possible; and (b)
describe the limitations and the code they affect. Such description must
be placed in a text file included with all distributions of the Covered
Software under this License. Except to the extent prohibited by statute
or regulation, such description must be sufficiently detailed for a
recipient of ordinary skill to be able to understand it.
5. Termination
--------------
5.1. The rights granted under this License will terminate automatically
if You fail to comply with any of its terms. However, if You become
compliant, then the rights granted under this License from a particular
Contributor are reinstated (a) provisionally, unless and until such
Contributor explicitly and finally terminates Your grants, and (b) on an
ongoing basis, if such Contributor fails to notify You of the
non-compliance by some reasonable means prior to 60 days after You have
come back into compliance. Moreover, Your grants from a particular
Contributor are reinstated on an ongoing basis if such Contributor
notifies You of the non-compliance by some reasonable means, this is the
first time You have received notice of non-compliance with this License
from such Contributor, and You become compliant prior to 30 days after
Your receipt of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions,
counter-claims, and cross-claims) alleging that a Contributor Version
directly or indirectly infringes any patent, then the rights granted to
You by any and all Contributors for the Covered Software under Section
2.1 of this License shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all
end user license agreements (excluding distributors and resellers) which
have been validly granted by You or Your distributors under this License
prior to termination shall survive termination.
************************************************************************
* *
* 6. Disclaimer of Warranty *
* ------------------------- *
* *
* Covered Software is provided under this License on an "as is" *
* basis, without warranty of any kind, either expressed, implied, or *
* statutory, including, without limitation, warranties that the *
* Covered Software is free of defects, merchantable, fit for a *
* particular purpose or non-infringing. The entire risk as to the *
* quality and performance of the Covered Software is with You. *
* Should any Covered Software prove defective in any respect, You *
* (not any Contributor) assume the cost of any necessary servicing, *
* repair, or correction. This disclaimer of warranty constitutes an *
* essential part of this License. No use of any Covered Software is *
* authorized under this License except under this disclaimer. *
* *
************************************************************************
************************************************************************
* *
* 7. Limitation of Liability *
* -------------------------- *
* *
* Under no circumstances and under no legal theory, whether tort *
* (including negligence), contract, or otherwise, shall any *
* Contributor, or anyone who distributes Covered Software as *
* permitted above, be liable to You for any direct, indirect, *
* special, incidental, or consequential damages of any character *
* including, without limitation, damages for lost profits, loss of *
* goodwill, work stoppage, computer failure or malfunction, or any *
* and all other commercial damages or losses, even if such party *
* shall have been informed of the possibility of such damages. This *
* limitation of liability shall not apply to liability for death or *
* personal injury resulting from such party's negligence to the *
* extent applicable law prohibits such limitation. Some *
* jurisdictions do not allow the exclusion or limitation of *
* incidental or consequential damages, so this exclusion and *
* limitation may not apply to You. *
* *
************************************************************************
8. Litigation
-------------
Any litigation relating to this License may be brought only in the
courts of a jurisdiction where the defendant maintains its principal
place of business and such litigation shall be governed by laws of that
jurisdiction, without reference to its conflict-of-law provisions.
Nothing in this Section shall prevent a party's ability to bring
cross-claims or counter-claims.
9. Miscellaneous
----------------
This License represents the complete agreement concerning the subject
matter hereof. If any provision of this License is held to be
unenforceable, such provision shall be reformed only to the extent
necessary to make it enforceable. Any law or regulation which provides
that the language of a contract shall be construed against the drafter
shall not be used to construe this License against a Contributor.
10. Versions of the License
---------------------------
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version
of the License under which You originally received the Covered Software,
or under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a
modified version of this License if you rename the license and remove
any references to the name of the license steward (except to note that
such modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary
Licenses
If You choose to distribute Source Code Form that is Incompatible With
Secondary Licenses under the terms of this version of the License, the
notice described in Exhibit B of this License must be attached.
Exhibit A - Source Code Form License Notice
-------------------------------------------
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular
file, then You may include the notice in a location (such as a LICENSE
file in a relevant directory) where a recipient would be likely to look
for such a notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - "Incompatible With Secondary Licenses" Notice
---------------------------------------------------------
This Source Code Form is "Incompatible With Secondary Licenses", as
defined by the Mozilla Public License, v. 2.0.

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# Go-MySQL-Driver
A MySQL-Driver for Go's [database/sql](https://golang.org/pkg/database/sql/) package
![Go-MySQL-Driver logo](https://raw.github.com/wiki/go-sql-driver/mysql/gomysql_m.png "Golang Gopher holding the MySQL Dolphin")
---------------------------------------
* [Features](#features)
* [Requirements](#requirements)
* [Installation](#installation)
* [Usage](#usage)
* [DSN (Data Source Name)](#dsn-data-source-name)
* [Password](#password)
* [Protocol](#protocol)
* [Address](#address)
* [Parameters](#parameters)
* [Examples](#examples)
* [Connection pool and timeouts](#connection-pool-and-timeouts)
* [context.Context Support](#contextcontext-support)
* [ColumnType Support](#columntype-support)
* [LOAD DATA LOCAL INFILE support](#load-data-local-infile-support)
* [time.Time support](#timetime-support)
* [Unicode support](#unicode-support)
* [Testing / Development](#testing--development)
* [License](#license)
---------------------------------------
## Features
* Lightweight and [fast](https://github.com/go-sql-driver/sql-benchmark "golang MySQL-Driver performance")
* Native Go implementation. No C-bindings, just pure Go
* Connections over TCP/IPv4, TCP/IPv6, Unix domain sockets or [custom protocols](https://godoc.org/github.com/go-sql-driver/mysql#DialFunc)
* Automatic handling of broken connections
* Automatic Connection Pooling *(by database/sql package)*
* Supports queries larger than 16MB
* Full [`sql.RawBytes`](https://golang.org/pkg/database/sql/#RawBytes) support.
* Intelligent `LONG DATA` handling in prepared statements
* Secure `LOAD DATA LOCAL INFILE` support with file Whitelisting and `io.Reader` support
* Optional `time.Time` parsing
* Optional placeholder interpolation
## Requirements
* Go 1.10 or higher. We aim to support the 3 latest versions of Go.
* MySQL (4.1+), MariaDB, Percona Server, Google CloudSQL or Sphinx (2.2.3+)
---------------------------------------
## Installation
Simple install the package to your [$GOPATH](https://github.com/golang/go/wiki/GOPATH "GOPATH") with the [go tool](https://golang.org/cmd/go/ "go command") from shell:
```bash
$ go get -u github.com/go-sql-driver/mysql
```
Make sure [Git is installed](https://git-scm.com/downloads) on your machine and in your system's `PATH`.
## Usage
_Go MySQL Driver_ is an implementation of Go's `database/sql/driver` interface. You only need to import the driver and can use the full [`database/sql`](https://golang.org/pkg/database/sql/) API then.
Use `mysql` as `driverName` and a valid [DSN](#dsn-data-source-name) as `dataSourceName`:
```go
import "database/sql"
import _ "github.com/go-sql-driver/mysql"
db, err := sql.Open("mysql", "user:password@/dbname")
```
[Examples are available in our Wiki](https://github.com/go-sql-driver/mysql/wiki/Examples "Go-MySQL-Driver Examples").
### DSN (Data Source Name)
The Data Source Name has a common format, like e.g. [PEAR DB](http://pear.php.net/manual/en/package.database.db.intro-dsn.php) uses it, but without type-prefix (optional parts marked by squared brackets):
```
[username[:password]@][protocol[(address)]]/dbname[?param1=value1&...&paramN=valueN]
```
A DSN in its fullest form:
```
username:password@protocol(address)/dbname?param=value
```
Except for the databasename, all values are optional. So the minimal DSN is:
```
/dbname
```
If you do not want to preselect a database, leave `dbname` empty:
```
/
```
This has the same effect as an empty DSN string:
```
```
Alternatively, [Config.FormatDSN](https://godoc.org/github.com/go-sql-driver/mysql#Config.FormatDSN) can be used to create a DSN string by filling a struct.
#### Password
Passwords can consist of any character. Escaping is **not** necessary.
#### Protocol
See [net.Dial](https://golang.org/pkg/net/#Dial) for more information which networks are available.
In general you should use an Unix domain socket if available and TCP otherwise for best performance.
#### Address
For TCP and UDP networks, addresses have the form `host[:port]`.
If `port` is omitted, the default port will be used.
If `host` is a literal IPv6 address, it must be enclosed in square brackets.
The functions [net.JoinHostPort](https://golang.org/pkg/net/#JoinHostPort) and [net.SplitHostPort](https://golang.org/pkg/net/#SplitHostPort) manipulate addresses in this form.
For Unix domain sockets the address is the absolute path to the MySQL-Server-socket, e.g. `/var/run/mysqld/mysqld.sock` or `/tmp/mysql.sock`.
#### Parameters
*Parameters are case-sensitive!*
Notice that any of `true`, `TRUE`, `True` or `1` is accepted to stand for a true boolean value. Not surprisingly, false can be specified as any of: `false`, `FALSE`, `False` or `0`.
##### `allowAllFiles`
```
Type: bool
Valid Values: true, false
Default: false
```
`allowAllFiles=true` disables the file Whitelist for `LOAD DATA LOCAL INFILE` and allows *all* files.
[*Might be insecure!*](http://dev.mysql.com/doc/refman/5.7/en/load-data-local.html)
##### `allowCleartextPasswords`
```
Type: bool
Valid Values: true, false
Default: false
```
`allowCleartextPasswords=true` allows using the [cleartext client side plugin](http://dev.mysql.com/doc/en/cleartext-authentication-plugin.html) if required by an account, such as one defined with the [PAM authentication plugin](http://dev.mysql.com/doc/en/pam-authentication-plugin.html). Sending passwords in clear text may be a security problem in some configurations. To avoid problems if there is any possibility that the password would be intercepted, clients should connect to MySQL Server using a method that protects the password. Possibilities include [TLS / SSL](#tls), IPsec, or a private network.
##### `allowNativePasswords`
```
Type: bool
Valid Values: true, false
Default: true
```
`allowNativePasswords=false` disallows the usage of MySQL native password method.
##### `allowOldPasswords`
```
Type: bool
Valid Values: true, false
Default: false
```
`allowOldPasswords=true` allows the usage of the insecure old password method. This should be avoided, but is necessary in some cases. See also [the old_passwords wiki page](https://github.com/go-sql-driver/mysql/wiki/old_passwords).
##### `charset`
```
Type: string
Valid Values: <name>
Default: none
```
Sets the charset used for client-server interaction (`"SET NAMES <value>"`). If multiple charsets are set (separated by a comma), the following charset is used if setting the charset failes. This enables for example support for `utf8mb4` ([introduced in MySQL 5.5.3](http://dev.mysql.com/doc/refman/5.5/en/charset-unicode-utf8mb4.html)) with fallback to `utf8` for older servers (`charset=utf8mb4,utf8`).
Usage of the `charset` parameter is discouraged because it issues additional queries to the server.
Unless you need the fallback behavior, please use `collation` instead.
##### `checkConnLiveness`
```
Type: bool
Valid Values: true, false
Default: true
```
On supported platforms connections retrieved from the connection pool are checked for liveness before using them. If the check fails, the respective connection is marked as bad and the query retried with another connection.
`checkConnLiveness=false` disables this liveness check of connections.
##### `collation`
```
Type: string
Valid Values: <name>
Default: utf8mb4_general_ci
```
Sets the collation used for client-server interaction on connection. In contrast to `charset`, `collation` does not issue additional queries. If the specified collation is unavailable on the target server, the connection will fail.
A list of valid charsets for a server is retrievable with `SHOW COLLATION`.
The default collation (`utf8mb4_general_ci`) is supported from MySQL 5.5. You should use an older collation (e.g. `utf8_general_ci`) for older MySQL.
Collations for charset "ucs2", "utf16", "utf16le", and "utf32" can not be used ([ref](https://dev.mysql.com/doc/refman/5.7/en/charset-connection.html#charset-connection-impermissible-client-charset)).
##### `clientFoundRows`
```
Type: bool
Valid Values: true, false
Default: false
```
`clientFoundRows=true` causes an UPDATE to return the number of matching rows instead of the number of rows changed.
##### `columnsWithAlias`
```
Type: bool
Valid Values: true, false
Default: false
```
When `columnsWithAlias` is true, calls to `sql.Rows.Columns()` will return the table alias and the column name separated by a dot. For example:
```
SELECT u.id FROM users as u
```
will return `u.id` instead of just `id` if `columnsWithAlias=true`.
##### `interpolateParams`
```
Type: bool
Valid Values: true, false
Default: false
```
If `interpolateParams` is true, placeholders (`?`) in calls to `db.Query()` and `db.Exec()` are interpolated into a single query string with given parameters. This reduces the number of roundtrips, since the driver has to prepare a statement, execute it with given parameters and close the statement again with `interpolateParams=false`.
*This can not be used together with the multibyte encodings BIG5, CP932, GB2312, GBK or SJIS. These are blacklisted as they may [introduce a SQL injection vulnerability](http://stackoverflow.com/a/12118602/3430118)!*
##### `loc`
```
Type: string
Valid Values: <escaped name>
Default: UTC
```
Sets the location for time.Time values (when using `parseTime=true`). *"Local"* sets the system's location. See [time.LoadLocation](https://golang.org/pkg/time/#LoadLocation) for details.
Note that this sets the location for time.Time values but does not change MySQL's [time_zone setting](https://dev.mysql.com/doc/refman/5.5/en/time-zone-support.html). For that see the [time_zone system variable](#system-variables), which can also be set as a DSN parameter.
Please keep in mind, that param values must be [url.QueryEscape](https://golang.org/pkg/net/url/#QueryEscape)'ed. Alternatively you can manually replace the `/` with `%2F`. For example `US/Pacific` would be `loc=US%2FPacific`.
##### `maxAllowedPacket`
```
Type: decimal number
Default: 4194304
```
Max packet size allowed in bytes. The default value is 4 MiB and should be adjusted to match the server settings. `maxAllowedPacket=0` can be used to automatically fetch the `max_allowed_packet` variable from server *on every connection*.
##### `multiStatements`
```
Type: bool
Valid Values: true, false
Default: false
```
Allow multiple statements in one query. While this allows batch queries, it also greatly increases the risk of SQL injections. Only the result of the first query is returned, all other results are silently discarded.
When `multiStatements` is used, `?` parameters must only be used in the first statement.
##### `parseTime`
```
Type: bool
Valid Values: true, false
Default: false
```
`parseTime=true` changes the output type of `DATE` and `DATETIME` values to `time.Time` instead of `[]byte` / `string`
The date or datetime like `0000-00-00 00:00:00` is converted into zero value of `time.Time`.
##### `readTimeout`
```
Type: duration
Default: 0
```
I/O read timeout. The value must be a decimal number with a unit suffix (*"ms"*, *"s"*, *"m"*, *"h"*), such as *"30s"*, *"0.5m"* or *"1m30s"*.
##### `rejectReadOnly`
```
Type: bool
Valid Values: true, false
Default: false
```
`rejectReadOnly=true` causes the driver to reject read-only connections. This
is for a possible race condition during an automatic failover, where the mysql
client gets connected to a read-only replica after the failover.
Note that this should be a fairly rare case, as an automatic failover normally
happens when the primary is down, and the race condition shouldn't happen
unless it comes back up online as soon as the failover is kicked off. On the
other hand, when this happens, a MySQL application can get stuck on a
read-only connection until restarted. It is however fairly easy to reproduce,
for example, using a manual failover on AWS Aurora's MySQL-compatible cluster.
If you are not relying on read-only transactions to reject writes that aren't
supposed to happen, setting this on some MySQL providers (such as AWS Aurora)
is safer for failovers.
Note that ERROR 1290 can be returned for a `read-only` server and this option will
cause a retry for that error. However the same error number is used for some
other cases. You should ensure your application will never cause an ERROR 1290
except for `read-only` mode when enabling this option.
##### `serverPubKey`
```
Type: string
Valid Values: <name>
Default: none
```
Server public keys can be registered with [`mysql.RegisterServerPubKey`](https://godoc.org/github.com/go-sql-driver/mysql#RegisterServerPubKey), which can then be used by the assigned name in the DSN.
Public keys are used to transmit encrypted data, e.g. for authentication.
If the server's public key is known, it should be set manually to avoid expensive and potentially insecure transmissions of the public key from the server to the client each time it is required.
##### `timeout`
```
Type: duration
Default: OS default
```
Timeout for establishing connections, aka dial timeout. The value must be a decimal number with a unit suffix (*"ms"*, *"s"*, *"m"*, *"h"*), such as *"30s"*, *"0.5m"* or *"1m30s"*.
##### `tls`
```
Type: bool / string
Valid Values: true, false, skip-verify, preferred, <name>
Default: false
```
`tls=true` enables TLS / SSL encrypted connection to the server. Use `skip-verify` if you want to use a self-signed or invalid certificate (server side) or use `preferred` to use TLS only when advertised by the server. This is similar to `skip-verify`, but additionally allows a fallback to a connection which is not encrypted. Neither `skip-verify` nor `preferred` add any reliable security. You can use a custom TLS config after registering it with [`mysql.RegisterTLSConfig`](https://godoc.org/github.com/go-sql-driver/mysql#RegisterTLSConfig).
##### `writeTimeout`
```
Type: duration
Default: 0
```
I/O write timeout. The value must be a decimal number with a unit suffix (*"ms"*, *"s"*, *"m"*, *"h"*), such as *"30s"*, *"0.5m"* or *"1m30s"*.
##### System Variables
Any other parameters are interpreted as system variables:
* `<boolean_var>=<value>`: `SET <boolean_var>=<value>`
* `<enum_var>=<value>`: `SET <enum_var>=<value>`
* `<string_var>=%27<value>%27`: `SET <string_var>='<value>'`
Rules:
* The values for string variables must be quoted with `'`.
* The values must also be [url.QueryEscape](http://golang.org/pkg/net/url/#QueryEscape)'ed!
(which implies values of string variables must be wrapped with `%27`).
Examples:
* `autocommit=1`: `SET autocommit=1`
* [`time_zone=%27Europe%2FParis%27`](https://dev.mysql.com/doc/refman/5.5/en/time-zone-support.html): `SET time_zone='Europe/Paris'`
* [`tx_isolation=%27REPEATABLE-READ%27`](https://dev.mysql.com/doc/refman/5.5/en/server-system-variables.html#sysvar_tx_isolation): `SET tx_isolation='REPEATABLE-READ'`
#### Examples
```
user@unix(/path/to/socket)/dbname
```
```
root:pw@unix(/tmp/mysql.sock)/myDatabase?loc=Local
```
```
user:password@tcp(localhost:5555)/dbname?tls=skip-verify&autocommit=true
```
Treat warnings as errors by setting the system variable [`sql_mode`](https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html):
```
user:password@/dbname?sql_mode=TRADITIONAL
```
TCP via IPv6:
```
user:password@tcp([de:ad:be:ef::ca:fe]:80)/dbname?timeout=90s&collation=utf8mb4_unicode_ci
```
TCP on a remote host, e.g. Amazon RDS:
```
id:password@tcp(your-amazonaws-uri.com:3306)/dbname
```
Google Cloud SQL on App Engine:
```
user:password@unix(/cloudsql/project-id:region-name:instance-name)/dbname
```
TCP using default port (3306) on localhost:
```
user:password@tcp/dbname?charset=utf8mb4,utf8&sys_var=esc%40ped
```
Use the default protocol (tcp) and host (localhost:3306):
```
user:password@/dbname
```
No Database preselected:
```
user:password@/
```
### Connection pool and timeouts
The connection pool is managed by Go's database/sql package. For details on how to configure the size of the pool and how long connections stay in the pool see `*DB.SetMaxOpenConns`, `*DB.SetMaxIdleConns`, and `*DB.SetConnMaxLifetime` in the [database/sql documentation](https://golang.org/pkg/database/sql/). The read, write, and dial timeouts for each individual connection are configured with the DSN parameters [`readTimeout`](#readtimeout), [`writeTimeout`](#writetimeout), and [`timeout`](#timeout), respectively.
## `ColumnType` Support
This driver supports the [`ColumnType` interface](https://golang.org/pkg/database/sql/#ColumnType) introduced in Go 1.8, with the exception of [`ColumnType.Length()`](https://golang.org/pkg/database/sql/#ColumnType.Length), which is currently not supported.
## `context.Context` Support
Go 1.8 added `database/sql` support for `context.Context`. This driver supports query timeouts and cancellation via contexts.
See [context support in the database/sql package](https://golang.org/doc/go1.8#database_sql) for more details.
### `LOAD DATA LOCAL INFILE` support
For this feature you need direct access to the package. Therefore you must change the import path (no `_`):
```go
import "github.com/go-sql-driver/mysql"
```
Files must be whitelisted by registering them with `mysql.RegisterLocalFile(filepath)` (recommended) or the Whitelist check must be deactivated by using the DSN parameter `allowAllFiles=true` ([*Might be insecure!*](http://dev.mysql.com/doc/refman/5.7/en/load-data-local.html)).
To use a `io.Reader` a handler function must be registered with `mysql.RegisterReaderHandler(name, handler)` which returns a `io.Reader` or `io.ReadCloser`. The Reader is available with the filepath `Reader::<name>` then. Choose different names for different handlers and `DeregisterReaderHandler` when you don't need it anymore.
See the [godoc of Go-MySQL-Driver](https://godoc.org/github.com/go-sql-driver/mysql "golang mysql driver documentation") for details.
### `time.Time` support
The default internal output type of MySQL `DATE` and `DATETIME` values is `[]byte` which allows you to scan the value into a `[]byte`, `string` or `sql.RawBytes` variable in your program.
However, many want to scan MySQL `DATE` and `DATETIME` values into `time.Time` variables, which is the logical equivalent in Go to `DATE` and `DATETIME` in MySQL. You can do that by changing the internal output type from `[]byte` to `time.Time` with the DSN parameter `parseTime=true`. You can set the default [`time.Time` location](https://golang.org/pkg/time/#Location) with the `loc` DSN parameter.
**Caution:** As of Go 1.1, this makes `time.Time` the only variable type you can scan `DATE` and `DATETIME` values into. This breaks for example [`sql.RawBytes` support](https://github.com/go-sql-driver/mysql/wiki/Examples#rawbytes).
Alternatively you can use the [`NullTime`](https://godoc.org/github.com/go-sql-driver/mysql#NullTime) type as the scan destination, which works with both `time.Time` and `string` / `[]byte`.
### Unicode support
Since version 1.5 Go-MySQL-Driver automatically uses the collation ` utf8mb4_general_ci` by default.
Other collations / charsets can be set using the [`collation`](#collation) DSN parameter.
Version 1.0 of the driver recommended adding `&charset=utf8` (alias for `SET NAMES utf8`) to the DSN to enable proper UTF-8 support. This is not necessary anymore. The [`collation`](#collation) parameter should be preferred to set another collation / charset than the default.
See http://dev.mysql.com/doc/refman/8.0/en/charset-unicode.html for more details on MySQL's Unicode support.
## Testing / Development
To run the driver tests you may need to adjust the configuration. See the [Testing Wiki-Page](https://github.com/go-sql-driver/mysql/wiki/Testing "Testing") for details.
Go-MySQL-Driver is not feature-complete yet. Your help is very appreciated.
If you want to contribute, you can work on an [open issue](https://github.com/go-sql-driver/mysql/issues?state=open) or review a [pull request](https://github.com/go-sql-driver/mysql/pulls).
See the [Contribution Guidelines](https://github.com/go-sql-driver/mysql/blob/master/CONTRIBUTING.md) for details.
---------------------------------------
## License
Go-MySQL-Driver is licensed under the [Mozilla Public License Version 2.0](https://raw.github.com/go-sql-driver/mysql/master/LICENSE)
Mozilla summarizes the license scope as follows:
> MPL: The copyleft applies to any files containing MPLed code.
That means:
* You can **use** the **unchanged** source code both in private and commercially.
* When distributing, you **must publish** the source code of any **changed files** licensed under the MPL 2.0 under a) the MPL 2.0 itself or b) a compatible license (e.g. GPL 3.0 or Apache License 2.0).
* You **needn't publish** the source code of your library as long as the files licensed under the MPL 2.0 are **unchanged**.
Please read the [MPL 2.0 FAQ](https://www.mozilla.org/en-US/MPL/2.0/FAQ/) if you have further questions regarding the license.
You can read the full terms here: [LICENSE](https://raw.github.com/go-sql-driver/mysql/master/LICENSE).
![Go Gopher and MySQL Dolphin](https://raw.github.com/wiki/go-sql-driver/mysql/go-mysql-driver_m.jpg "Golang Gopher transporting the MySQL Dolphin in a wheelbarrow")

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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2018 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"crypto/rand"
"crypto/rsa"
"crypto/sha1"
"crypto/sha256"
"crypto/x509"
"encoding/pem"
"sync"
)
// server pub keys registry
var (
serverPubKeyLock sync.RWMutex
serverPubKeyRegistry map[string]*rsa.PublicKey
)
// RegisterServerPubKey registers a server RSA public key which can be used to
// send data in a secure manner to the server without receiving the public key
// in a potentially insecure way from the server first.
// Registered keys can afterwards be used adding serverPubKey=<name> to the DSN.
//
// Note: The provided rsa.PublicKey instance is exclusively owned by the driver
// after registering it and may not be modified.
//
// data, err := ioutil.ReadFile("mykey.pem")
// if err != nil {
// log.Fatal(err)
// }
//
// block, _ := pem.Decode(data)
// if block == nil || block.Type != "PUBLIC KEY" {
// log.Fatal("failed to decode PEM block containing public key")
// }
//
// pub, err := x509.ParsePKIXPublicKey(block.Bytes)
// if err != nil {
// log.Fatal(err)
// }
//
// if rsaPubKey, ok := pub.(*rsa.PublicKey); ok {
// mysql.RegisterServerPubKey("mykey", rsaPubKey)
// } else {
// log.Fatal("not a RSA public key")
// }
//
func RegisterServerPubKey(name string, pubKey *rsa.PublicKey) {
serverPubKeyLock.Lock()
if serverPubKeyRegistry == nil {
serverPubKeyRegistry = make(map[string]*rsa.PublicKey)
}
serverPubKeyRegistry[name] = pubKey
serverPubKeyLock.Unlock()
}
// DeregisterServerPubKey removes the public key registered with the given name.
func DeregisterServerPubKey(name string) {
serverPubKeyLock.Lock()
if serverPubKeyRegistry != nil {
delete(serverPubKeyRegistry, name)
}
serverPubKeyLock.Unlock()
}
func getServerPubKey(name string) (pubKey *rsa.PublicKey) {
serverPubKeyLock.RLock()
if v, ok := serverPubKeyRegistry[name]; ok {
pubKey = v
}
serverPubKeyLock.RUnlock()
return
}
// Hash password using pre 4.1 (old password) method
// https://github.com/atcurtis/mariadb/blob/master/mysys/my_rnd.c
type myRnd struct {
seed1, seed2 uint32
}
const myRndMaxVal = 0x3FFFFFFF
// Pseudo random number generator
func newMyRnd(seed1, seed2 uint32) *myRnd {
return &myRnd{
seed1: seed1 % myRndMaxVal,
seed2: seed2 % myRndMaxVal,
}
}
// Tested to be equivalent to MariaDB's floating point variant
// http://play.golang.org/p/QHvhd4qved
// http://play.golang.org/p/RG0q4ElWDx
func (r *myRnd) NextByte() byte {
r.seed1 = (r.seed1*3 + r.seed2) % myRndMaxVal
r.seed2 = (r.seed1 + r.seed2 + 33) % myRndMaxVal
return byte(uint64(r.seed1) * 31 / myRndMaxVal)
}
// Generate binary hash from byte string using insecure pre 4.1 method
func pwHash(password []byte) (result [2]uint32) {
var add uint32 = 7
var tmp uint32
result[0] = 1345345333
result[1] = 0x12345671
for _, c := range password {
// skip spaces and tabs in password
if c == ' ' || c == '\t' {
continue
}
tmp = uint32(c)
result[0] ^= (((result[0] & 63) + add) * tmp) + (result[0] << 8)
result[1] += (result[1] << 8) ^ result[0]
add += tmp
}
// Remove sign bit (1<<31)-1)
result[0] &= 0x7FFFFFFF
result[1] &= 0x7FFFFFFF
return
}
// Hash password using insecure pre 4.1 method
func scrambleOldPassword(scramble []byte, password string) []byte {
if len(password) == 0 {
return nil
}
scramble = scramble[:8]
hashPw := pwHash([]byte(password))
hashSc := pwHash(scramble)
r := newMyRnd(hashPw[0]^hashSc[0], hashPw[1]^hashSc[1])
var out [8]byte
for i := range out {
out[i] = r.NextByte() + 64
}
mask := r.NextByte()
for i := range out {
out[i] ^= mask
}
return out[:]
}
// Hash password using 4.1+ method (SHA1)
func scramblePassword(scramble []byte, password string) []byte {
if len(password) == 0 {
return nil
}
// stage1Hash = SHA1(password)
crypt := sha1.New()
crypt.Write([]byte(password))
stage1 := crypt.Sum(nil)
// scrambleHash = SHA1(scramble + SHA1(stage1Hash))
// inner Hash
crypt.Reset()
crypt.Write(stage1)
hash := crypt.Sum(nil)
// outer Hash
crypt.Reset()
crypt.Write(scramble)
crypt.Write(hash)
scramble = crypt.Sum(nil)
// token = scrambleHash XOR stage1Hash
for i := range scramble {
scramble[i] ^= stage1[i]
}
return scramble
}
// Hash password using MySQL 8+ method (SHA256)
func scrambleSHA256Password(scramble []byte, password string) []byte {
if len(password) == 0 {
return nil
}
// XOR(SHA256(password), SHA256(SHA256(SHA256(password)), scramble))
crypt := sha256.New()
crypt.Write([]byte(password))
message1 := crypt.Sum(nil)
crypt.Reset()
crypt.Write(message1)
message1Hash := crypt.Sum(nil)
crypt.Reset()
crypt.Write(message1Hash)
crypt.Write(scramble)
message2 := crypt.Sum(nil)
for i := range message1 {
message1[i] ^= message2[i]
}
return message1
}
func encryptPassword(password string, seed []byte, pub *rsa.PublicKey) ([]byte, error) {
plain := make([]byte, len(password)+1)
copy(plain, password)
for i := range plain {
j := i % len(seed)
plain[i] ^= seed[j]
}
sha1 := sha1.New()
return rsa.EncryptOAEP(sha1, rand.Reader, pub, plain, nil)
}
func (mc *mysqlConn) sendEncryptedPassword(seed []byte, pub *rsa.PublicKey) error {
enc, err := encryptPassword(mc.cfg.Passwd, seed, pub)
if err != nil {
return err
}
return mc.writeAuthSwitchPacket(enc)
}
func (mc *mysqlConn) auth(authData []byte, plugin string) ([]byte, error) {
switch plugin {
case "caching_sha2_password":
authResp := scrambleSHA256Password(authData, mc.cfg.Passwd)
return authResp, nil
case "mysql_old_password":
if !mc.cfg.AllowOldPasswords {
return nil, ErrOldPassword
}
// Note: there are edge cases where this should work but doesn't;
// this is currently "wontfix":
// https://github.com/go-sql-driver/mysql/issues/184
authResp := append(scrambleOldPassword(authData[:8], mc.cfg.Passwd), 0)
return authResp, nil
case "mysql_clear_password":
if !mc.cfg.AllowCleartextPasswords {
return nil, ErrCleartextPassword
}
// http://dev.mysql.com/doc/refman/5.7/en/cleartext-authentication-plugin.html
// http://dev.mysql.com/doc/refman/5.7/en/pam-authentication-plugin.html
return append([]byte(mc.cfg.Passwd), 0), nil
case "mysql_native_password":
if !mc.cfg.AllowNativePasswords {
return nil, ErrNativePassword
}
// https://dev.mysql.com/doc/internals/en/secure-password-authentication.html
// Native password authentication only need and will need 20-byte challenge.
authResp := scramblePassword(authData[:20], mc.cfg.Passwd)
return authResp, nil
case "sha256_password":
if len(mc.cfg.Passwd) == 0 {
return []byte{0}, nil
}
if mc.cfg.tls != nil || mc.cfg.Net == "unix" {
// write cleartext auth packet
return append([]byte(mc.cfg.Passwd), 0), nil
}
pubKey := mc.cfg.pubKey
if pubKey == nil {
// request public key from server
return []byte{1}, nil
}
// encrypted password
enc, err := encryptPassword(mc.cfg.Passwd, authData, pubKey)
return enc, err
default:
errLog.Print("unknown auth plugin:", plugin)
return nil, ErrUnknownPlugin
}
}
func (mc *mysqlConn) handleAuthResult(oldAuthData []byte, plugin string) error {
// Read Result Packet
authData, newPlugin, err := mc.readAuthResult()
if err != nil {
return err
}
// handle auth plugin switch, if requested
if newPlugin != "" {
// If CLIENT_PLUGIN_AUTH capability is not supported, no new cipher is
// sent and we have to keep using the cipher sent in the init packet.
if authData == nil {
authData = oldAuthData
} else {
// copy data from read buffer to owned slice
copy(oldAuthData, authData)
}
plugin = newPlugin
authResp, err := mc.auth(authData, plugin)
if err != nil {
return err
}
if err = mc.writeAuthSwitchPacket(authResp); err != nil {
return err
}
// Read Result Packet
authData, newPlugin, err = mc.readAuthResult()
if err != nil {
return err
}
// Do not allow to change the auth plugin more than once
if newPlugin != "" {
return ErrMalformPkt
}
}
switch plugin {
// https://insidemysql.com/preparing-your-community-connector-for-mysql-8-part-2-sha256/
case "caching_sha2_password":
switch len(authData) {
case 0:
return nil // auth successful
case 1:
switch authData[0] {
case cachingSha2PasswordFastAuthSuccess:
if err = mc.readResultOK(); err == nil {
return nil // auth successful
}
case cachingSha2PasswordPerformFullAuthentication:
if mc.cfg.tls != nil || mc.cfg.Net == "unix" {
// write cleartext auth packet
err = mc.writeAuthSwitchPacket(append([]byte(mc.cfg.Passwd), 0))
if err != nil {
return err
}
} else {
pubKey := mc.cfg.pubKey
if pubKey == nil {
// request public key from server
data, err := mc.buf.takeSmallBuffer(4 + 1)
if err != nil {
return err
}
data[4] = cachingSha2PasswordRequestPublicKey
mc.writePacket(data)
// parse public key
if data, err = mc.readPacket(); err != nil {
return err
}
block, _ := pem.Decode(data[1:])
pkix, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
return err
}
pubKey = pkix.(*rsa.PublicKey)
}
// send encrypted password
err = mc.sendEncryptedPassword(oldAuthData, pubKey)
if err != nil {
return err
}
}
return mc.readResultOK()
default:
return ErrMalformPkt
}
default:
return ErrMalformPkt
}
case "sha256_password":
switch len(authData) {
case 0:
return nil // auth successful
default:
block, _ := pem.Decode(authData)
pub, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
return err
}
// send encrypted password
err = mc.sendEncryptedPassword(oldAuthData, pub.(*rsa.PublicKey))
if err != nil {
return err
}
return mc.readResultOK()
}
default:
return nil // auth successful
}
return err
}

182
vendor/github.com/go-sql-driver/mysql/buffer.go generated vendored Normal file
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@ -0,0 +1,182 @@
// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"io"
"net"
"time"
)
const defaultBufSize = 4096
const maxCachedBufSize = 256 * 1024
// A buffer which is used for both reading and writing.
// This is possible since communication on each connection is synchronous.
// In other words, we can't write and read simultaneously on the same connection.
// The buffer is similar to bufio.Reader / Writer but zero-copy-ish
// Also highly optimized for this particular use case.
// This buffer is backed by two byte slices in a double-buffering scheme
type buffer struct {
buf []byte // buf is a byte buffer who's length and capacity are equal.
nc net.Conn
idx int
length int
timeout time.Duration
dbuf [2][]byte // dbuf is an array with the two byte slices that back this buffer
flipcnt uint // flipccnt is the current buffer counter for double-buffering
}
// newBuffer allocates and returns a new buffer.
func newBuffer(nc net.Conn) buffer {
fg := make([]byte, defaultBufSize)
return buffer{
buf: fg,
nc: nc,
dbuf: [2][]byte{fg, nil},
}
}
// flip replaces the active buffer with the background buffer
// this is a delayed flip that simply increases the buffer counter;
// the actual flip will be performed the next time we call `buffer.fill`
func (b *buffer) flip() {
b.flipcnt += 1
}
// fill reads into the buffer until at least _need_ bytes are in it
func (b *buffer) fill(need int) error {
n := b.length
// fill data into its double-buffering target: if we've called
// flip on this buffer, we'll be copying to the background buffer,
// and then filling it with network data; otherwise we'll just move
// the contents of the current buffer to the front before filling it
dest := b.dbuf[b.flipcnt&1]
// grow buffer if necessary to fit the whole packet.
if need > len(dest) {
// Round up to the next multiple of the default size
dest = make([]byte, ((need/defaultBufSize)+1)*defaultBufSize)
// if the allocated buffer is not too large, move it to backing storage
// to prevent extra allocations on applications that perform large reads
if len(dest) <= maxCachedBufSize {
b.dbuf[b.flipcnt&1] = dest
}
}
// if we're filling the fg buffer, move the existing data to the start of it.
// if we're filling the bg buffer, copy over the data
if n > 0 {
copy(dest[:n], b.buf[b.idx:])
}
b.buf = dest
b.idx = 0
for {
if b.timeout > 0 {
if err := b.nc.SetReadDeadline(time.Now().Add(b.timeout)); err != nil {
return err
}
}
nn, err := b.nc.Read(b.buf[n:])
n += nn
switch err {
case nil:
if n < need {
continue
}
b.length = n
return nil
case io.EOF:
if n >= need {
b.length = n
return nil
}
return io.ErrUnexpectedEOF
default:
return err
}
}
}
// returns next N bytes from buffer.
// The returned slice is only guaranteed to be valid until the next read
func (b *buffer) readNext(need int) ([]byte, error) {
if b.length < need {
// refill
if err := b.fill(need); err != nil {
return nil, err
}
}
offset := b.idx
b.idx += need
b.length -= need
return b.buf[offset:b.idx], nil
}
// takeBuffer returns a buffer with the requested size.
// If possible, a slice from the existing buffer is returned.
// Otherwise a bigger buffer is made.
// Only one buffer (total) can be used at a time.
func (b *buffer) takeBuffer(length int) ([]byte, error) {
if b.length > 0 {
return nil, ErrBusyBuffer
}
// test (cheap) general case first
if length <= cap(b.buf) {
return b.buf[:length], nil
}
if length < maxPacketSize {
b.buf = make([]byte, length)
return b.buf, nil
}
// buffer is larger than we want to store.
return make([]byte, length), nil
}
// takeSmallBuffer is shortcut which can be used if length is
// known to be smaller than defaultBufSize.
// Only one buffer (total) can be used at a time.
func (b *buffer) takeSmallBuffer(length int) ([]byte, error) {
if b.length > 0 {
return nil, ErrBusyBuffer
}
return b.buf[:length], nil
}
// takeCompleteBuffer returns the complete existing buffer.
// This can be used if the necessary buffer size is unknown.
// cap and len of the returned buffer will be equal.
// Only one buffer (total) can be used at a time.
func (b *buffer) takeCompleteBuffer() ([]byte, error) {
if b.length > 0 {
return nil, ErrBusyBuffer
}
return b.buf, nil
}
// store stores buf, an updated buffer, if its suitable to do so.
func (b *buffer) store(buf []byte) error {
if b.length > 0 {
return ErrBusyBuffer
} else if cap(buf) <= maxPacketSize && cap(buf) > cap(b.buf) {
b.buf = buf[:cap(buf)]
}
return nil
}

265
vendor/github.com/go-sql-driver/mysql/collations.go generated vendored Normal file
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@ -0,0 +1,265 @@
// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2014 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
const defaultCollation = "utf8mb4_general_ci"
const binaryCollation = "binary"
// A list of available collations mapped to the internal ID.
// To update this map use the following MySQL query:
// SELECT COLLATION_NAME, ID FROM information_schema.COLLATIONS WHERE ID<256 ORDER BY ID
//
// Handshake packet have only 1 byte for collation_id. So we can't use collations with ID > 255.
//
// ucs2, utf16, and utf32 can't be used for connection charset.
// https://dev.mysql.com/doc/refman/5.7/en/charset-connection.html#charset-connection-impermissible-client-charset
// They are commented out to reduce this map.
var collations = map[string]byte{
"big5_chinese_ci": 1,
"latin2_czech_cs": 2,
"dec8_swedish_ci": 3,
"cp850_general_ci": 4,
"latin1_german1_ci": 5,
"hp8_english_ci": 6,
"koi8r_general_ci": 7,
"latin1_swedish_ci": 8,
"latin2_general_ci": 9,
"swe7_swedish_ci": 10,
"ascii_general_ci": 11,
"ujis_japanese_ci": 12,
"sjis_japanese_ci": 13,
"cp1251_bulgarian_ci": 14,
"latin1_danish_ci": 15,
"hebrew_general_ci": 16,
"tis620_thai_ci": 18,
"euckr_korean_ci": 19,
"latin7_estonian_cs": 20,
"latin2_hungarian_ci": 21,
"koi8u_general_ci": 22,
"cp1251_ukrainian_ci": 23,
"gb2312_chinese_ci": 24,
"greek_general_ci": 25,
"cp1250_general_ci": 26,
"latin2_croatian_ci": 27,
"gbk_chinese_ci": 28,
"cp1257_lithuanian_ci": 29,
"latin5_turkish_ci": 30,
"latin1_german2_ci": 31,
"armscii8_general_ci": 32,
"utf8_general_ci": 33,
"cp1250_czech_cs": 34,
//"ucs2_general_ci": 35,
"cp866_general_ci": 36,
"keybcs2_general_ci": 37,
"macce_general_ci": 38,
"macroman_general_ci": 39,
"cp852_general_ci": 40,
"latin7_general_ci": 41,
"latin7_general_cs": 42,
"macce_bin": 43,
"cp1250_croatian_ci": 44,
"utf8mb4_general_ci": 45,
"utf8mb4_bin": 46,
"latin1_bin": 47,
"latin1_general_ci": 48,
"latin1_general_cs": 49,
"cp1251_bin": 50,
"cp1251_general_ci": 51,
"cp1251_general_cs": 52,
"macroman_bin": 53,
//"utf16_general_ci": 54,
//"utf16_bin": 55,
//"utf16le_general_ci": 56,
"cp1256_general_ci": 57,
"cp1257_bin": 58,
"cp1257_general_ci": 59,
//"utf32_general_ci": 60,
//"utf32_bin": 61,
//"utf16le_bin": 62,
"binary": 63,
"armscii8_bin": 64,
"ascii_bin": 65,
"cp1250_bin": 66,
"cp1256_bin": 67,
"cp866_bin": 68,
"dec8_bin": 69,
"greek_bin": 70,
"hebrew_bin": 71,
"hp8_bin": 72,
"keybcs2_bin": 73,
"koi8r_bin": 74,
"koi8u_bin": 75,
"utf8_tolower_ci": 76,
"latin2_bin": 77,
"latin5_bin": 78,
"latin7_bin": 79,
"cp850_bin": 80,
"cp852_bin": 81,
"swe7_bin": 82,
"utf8_bin": 83,
"big5_bin": 84,
"euckr_bin": 85,
"gb2312_bin": 86,
"gbk_bin": 87,
"sjis_bin": 88,
"tis620_bin": 89,
//"ucs2_bin": 90,
"ujis_bin": 91,
"geostd8_general_ci": 92,
"geostd8_bin": 93,
"latin1_spanish_ci": 94,
"cp932_japanese_ci": 95,
"cp932_bin": 96,
"eucjpms_japanese_ci": 97,
"eucjpms_bin": 98,
"cp1250_polish_ci": 99,
//"utf16_unicode_ci": 101,
//"utf16_icelandic_ci": 102,
//"utf16_latvian_ci": 103,
//"utf16_romanian_ci": 104,
//"utf16_slovenian_ci": 105,
//"utf16_polish_ci": 106,
//"utf16_estonian_ci": 107,
//"utf16_spanish_ci": 108,
//"utf16_swedish_ci": 109,
//"utf16_turkish_ci": 110,
//"utf16_czech_ci": 111,
//"utf16_danish_ci": 112,
//"utf16_lithuanian_ci": 113,
//"utf16_slovak_ci": 114,
//"utf16_spanish2_ci": 115,
//"utf16_roman_ci": 116,
//"utf16_persian_ci": 117,
//"utf16_esperanto_ci": 118,
//"utf16_hungarian_ci": 119,
//"utf16_sinhala_ci": 120,
//"utf16_german2_ci": 121,
//"utf16_croatian_ci": 122,
//"utf16_unicode_520_ci": 123,
//"utf16_vietnamese_ci": 124,
//"ucs2_unicode_ci": 128,
//"ucs2_icelandic_ci": 129,
//"ucs2_latvian_ci": 130,
//"ucs2_romanian_ci": 131,
//"ucs2_slovenian_ci": 132,
//"ucs2_polish_ci": 133,
//"ucs2_estonian_ci": 134,
//"ucs2_spanish_ci": 135,
//"ucs2_swedish_ci": 136,
//"ucs2_turkish_ci": 137,
//"ucs2_czech_ci": 138,
//"ucs2_danish_ci": 139,
//"ucs2_lithuanian_ci": 140,
//"ucs2_slovak_ci": 141,
//"ucs2_spanish2_ci": 142,
//"ucs2_roman_ci": 143,
//"ucs2_persian_ci": 144,
//"ucs2_esperanto_ci": 145,
//"ucs2_hungarian_ci": 146,
//"ucs2_sinhala_ci": 147,
//"ucs2_german2_ci": 148,
//"ucs2_croatian_ci": 149,
//"ucs2_unicode_520_ci": 150,
//"ucs2_vietnamese_ci": 151,
//"ucs2_general_mysql500_ci": 159,
//"utf32_unicode_ci": 160,
//"utf32_icelandic_ci": 161,
//"utf32_latvian_ci": 162,
//"utf32_romanian_ci": 163,
//"utf32_slovenian_ci": 164,
//"utf32_polish_ci": 165,
//"utf32_estonian_ci": 166,
//"utf32_spanish_ci": 167,
//"utf32_swedish_ci": 168,
//"utf32_turkish_ci": 169,
//"utf32_czech_ci": 170,
//"utf32_danish_ci": 171,
//"utf32_lithuanian_ci": 172,
//"utf32_slovak_ci": 173,
//"utf32_spanish2_ci": 174,
//"utf32_roman_ci": 175,
//"utf32_persian_ci": 176,
//"utf32_esperanto_ci": 177,
//"utf32_hungarian_ci": 178,
//"utf32_sinhala_ci": 179,
//"utf32_german2_ci": 180,
//"utf32_croatian_ci": 181,
//"utf32_unicode_520_ci": 182,
//"utf32_vietnamese_ci": 183,
"utf8_unicode_ci": 192,
"utf8_icelandic_ci": 193,
"utf8_latvian_ci": 194,
"utf8_romanian_ci": 195,
"utf8_slovenian_ci": 196,
"utf8_polish_ci": 197,
"utf8_estonian_ci": 198,
"utf8_spanish_ci": 199,
"utf8_swedish_ci": 200,
"utf8_turkish_ci": 201,
"utf8_czech_ci": 202,
"utf8_danish_ci": 203,
"utf8_lithuanian_ci": 204,
"utf8_slovak_ci": 205,
"utf8_spanish2_ci": 206,
"utf8_roman_ci": 207,
"utf8_persian_ci": 208,
"utf8_esperanto_ci": 209,
"utf8_hungarian_ci": 210,
"utf8_sinhala_ci": 211,
"utf8_german2_ci": 212,
"utf8_croatian_ci": 213,
"utf8_unicode_520_ci": 214,
"utf8_vietnamese_ci": 215,
"utf8_general_mysql500_ci": 223,
"utf8mb4_unicode_ci": 224,
"utf8mb4_icelandic_ci": 225,
"utf8mb4_latvian_ci": 226,
"utf8mb4_romanian_ci": 227,
"utf8mb4_slovenian_ci": 228,
"utf8mb4_polish_ci": 229,
"utf8mb4_estonian_ci": 230,
"utf8mb4_spanish_ci": 231,
"utf8mb4_swedish_ci": 232,
"utf8mb4_turkish_ci": 233,
"utf8mb4_czech_ci": 234,
"utf8mb4_danish_ci": 235,
"utf8mb4_lithuanian_ci": 236,
"utf8mb4_slovak_ci": 237,
"utf8mb4_spanish2_ci": 238,
"utf8mb4_roman_ci": 239,
"utf8mb4_persian_ci": 240,
"utf8mb4_esperanto_ci": 241,
"utf8mb4_hungarian_ci": 242,
"utf8mb4_sinhala_ci": 243,
"utf8mb4_german2_ci": 244,
"utf8mb4_croatian_ci": 245,
"utf8mb4_unicode_520_ci": 246,
"utf8mb4_vietnamese_ci": 247,
"gb18030_chinese_ci": 248,
"gb18030_bin": 249,
"gb18030_unicode_520_ci": 250,
"utf8mb4_0900_ai_ci": 255,
}
// A blacklist of collations which is unsafe to interpolate parameters.
// These multibyte encodings may contains 0x5c (`\`) in their trailing bytes.
var unsafeCollations = map[string]bool{
"big5_chinese_ci": true,
"sjis_japanese_ci": true,
"gbk_chinese_ci": true,
"big5_bin": true,
"gb2312_bin": true,
"gbk_bin": true,
"sjis_bin": true,
"cp932_japanese_ci": true,
"cp932_bin": true,
"gb18030_chinese_ci": true,
"gb18030_bin": true,
"gb18030_unicode_520_ci": true,
}

54
vendor/github.com/go-sql-driver/mysql/conncheck.go generated vendored Normal file
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@ -0,0 +1,54 @@
// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2019 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
// +build linux darwin dragonfly freebsd netbsd openbsd solaris illumos
package mysql
import (
"errors"
"io"
"net"
"syscall"
)
var errUnexpectedRead = errors.New("unexpected read from socket")
func connCheck(conn net.Conn) error {
var sysErr error
sysConn, ok := conn.(syscall.Conn)
if !ok {
return nil
}
rawConn, err := sysConn.SyscallConn()
if err != nil {
return err
}
err = rawConn.Read(func(fd uintptr) bool {
var buf [1]byte
n, err := syscall.Read(int(fd), buf[:])
switch {
case n == 0 && err == nil:
sysErr = io.EOF
case n > 0:
sysErr = errUnexpectedRead
case err == syscall.EAGAIN || err == syscall.EWOULDBLOCK:
sysErr = nil
default:
sysErr = err
}
return true
})
if err != nil {
return err
}
return sysErr
}

17
vendor/github.com/go-sql-driver/mysql/conncheck_dummy.go generated vendored Normal file
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@ -0,0 +1,17 @@
// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2019 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
// +build !linux,!darwin,!dragonfly,!freebsd,!netbsd,!openbsd,!solaris,!illumos
package mysql
import "net"
func connCheck(conn net.Conn) error {
return nil
}

651
vendor/github.com/go-sql-driver/mysql/connection.go generated vendored Normal file
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@ -0,0 +1,651 @@
// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"context"
"database/sql"
"database/sql/driver"
"io"
"net"
"strconv"
"strings"
"time"
)
type mysqlConn struct {
buf buffer
netConn net.Conn
rawConn net.Conn // underlying connection when netConn is TLS connection.
affectedRows uint64
insertId uint64
cfg *Config
maxAllowedPacket int
maxWriteSize int
writeTimeout time.Duration
flags clientFlag
status statusFlag
sequence uint8
parseTime bool
reset bool // set when the Go SQL package calls ResetSession
// for context support (Go 1.8+)
watching bool
watcher chan<- context.Context
closech chan struct{}
finished chan<- struct{}
canceled atomicError // set non-nil if conn is canceled
closed atomicBool // set when conn is closed, before closech is closed
}
// Handles parameters set in DSN after the connection is established
func (mc *mysqlConn) handleParams() (err error) {
for param, val := range mc.cfg.Params {
switch param {
// Charset
case "charset":
charsets := strings.Split(val, ",")
for i := range charsets {
// ignore errors here - a charset may not exist
err = mc.exec("SET NAMES " + charsets[i])
if err == nil {
break
}
}
if err != nil {
return
}
// System Vars
default:
err = mc.exec("SET " + param + "=" + val + "")
if err != nil {
return
}
}
}
return
}
func (mc *mysqlConn) markBadConn(err error) error {
if mc == nil {
return err
}
if err != errBadConnNoWrite {
return err
}
return driver.ErrBadConn
}
func (mc *mysqlConn) Begin() (driver.Tx, error) {
return mc.begin(false)
}
func (mc *mysqlConn) begin(readOnly bool) (driver.Tx, error) {
if mc.closed.IsSet() {
errLog.Print(ErrInvalidConn)
return nil, driver.ErrBadConn
}
var q string
if readOnly {
q = "START TRANSACTION READ ONLY"
} else {
q = "START TRANSACTION"
}
err := mc.exec(q)
if err == nil {
return &mysqlTx{mc}, err
}
return nil, mc.markBadConn(err)
}
func (mc *mysqlConn) Close() (err error) {
// Makes Close idempotent
if !mc.closed.IsSet() {
err = mc.writeCommandPacket(comQuit)
}
mc.cleanup()
return
}
// Closes the network connection and unsets internal variables. Do not call this
// function after successfully authentication, call Close instead. This function
// is called before auth or on auth failure because MySQL will have already
// closed the network connection.
func (mc *mysqlConn) cleanup() {
if !mc.closed.TrySet(true) {
return
}
// Makes cleanup idempotent
close(mc.closech)
if mc.netConn == nil {
return
}
if err := mc.netConn.Close(); err != nil {
errLog.Print(err)
}
}
func (mc *mysqlConn) error() error {
if mc.closed.IsSet() {
if err := mc.canceled.Value(); err != nil {
return err
}
return ErrInvalidConn
}
return nil
}
func (mc *mysqlConn) Prepare(query string) (driver.Stmt, error) {
if mc.closed.IsSet() {
errLog.Print(ErrInvalidConn)
return nil, driver.ErrBadConn
}
// Send command
err := mc.writeCommandPacketStr(comStmtPrepare, query)
if err != nil {
// STMT_PREPARE is safe to retry. So we can return ErrBadConn here.
errLog.Print(err)
return nil, driver.ErrBadConn
}
stmt := &mysqlStmt{
mc: mc,
}
// Read Result
columnCount, err := stmt.readPrepareResultPacket()
if err == nil {
if stmt.paramCount > 0 {
if err = mc.readUntilEOF(); err != nil {
return nil, err
}
}
if columnCount > 0 {
err = mc.readUntilEOF()
}
}
return stmt, err
}
func (mc *mysqlConn) interpolateParams(query string, args []driver.Value) (string, error) {
// Number of ? should be same to len(args)
if strings.Count(query, "?") != len(args) {
return "", driver.ErrSkip
}
buf, err := mc.buf.takeCompleteBuffer()
if err != nil {
// can not take the buffer. Something must be wrong with the connection
errLog.Print(err)
return "", ErrInvalidConn
}
buf = buf[:0]
argPos := 0
for i := 0; i < len(query); i++ {
q := strings.IndexByte(query[i:], '?')
if q == -1 {
buf = append(buf, query[i:]...)
break
}
buf = append(buf, query[i:i+q]...)
i += q
arg := args[argPos]
argPos++
if arg == nil {
buf = append(buf, "NULL"...)
continue
}
switch v := arg.(type) {
case int64:
buf = strconv.AppendInt(buf, v, 10)
case uint64:
// Handle uint64 explicitly because our custom ConvertValue emits unsigned values
buf = strconv.AppendUint(buf, v, 10)
case float64:
buf = strconv.AppendFloat(buf, v, 'g', -1, 64)
case bool:
if v {
buf = append(buf, '1')
} else {
buf = append(buf, '0')
}
case time.Time:
if v.IsZero() {
buf = append(buf, "'0000-00-00'"...)
} else {
v := v.In(mc.cfg.Loc)
v = v.Add(time.Nanosecond * 500) // To round under microsecond
year := v.Year()
year100 := year / 100
year1 := year % 100
month := v.Month()
day := v.Day()
hour := v.Hour()
minute := v.Minute()
second := v.Second()
micro := v.Nanosecond() / 1000
buf = append(buf, []byte{
'\'',
digits10[year100], digits01[year100],
digits10[year1], digits01[year1],
'-',
digits10[month], digits01[month],
'-',
digits10[day], digits01[day],
' ',
digits10[hour], digits01[hour],
':',
digits10[minute], digits01[minute],
':',
digits10[second], digits01[second],
}...)
if micro != 0 {
micro10000 := micro / 10000
micro100 := micro / 100 % 100
micro1 := micro % 100
buf = append(buf, []byte{
'.',
digits10[micro10000], digits01[micro10000],
digits10[micro100], digits01[micro100],
digits10[micro1], digits01[micro1],
}...)
}
buf = append(buf, '\'')
}
case []byte:
if v == nil {
buf = append(buf, "NULL"...)
} else {
buf = append(buf, "_binary'"...)
if mc.status&statusNoBackslashEscapes == 0 {
buf = escapeBytesBackslash(buf, v)
} else {
buf = escapeBytesQuotes(buf, v)
}
buf = append(buf, '\'')
}
case string:
buf = append(buf, '\'')
if mc.status&statusNoBackslashEscapes == 0 {
buf = escapeStringBackslash(buf, v)
} else {
buf = escapeStringQuotes(buf, v)
}
buf = append(buf, '\'')
default:
return "", driver.ErrSkip
}
if len(buf)+4 > mc.maxAllowedPacket {
return "", driver.ErrSkip
}
}
if argPos != len(args) {
return "", driver.ErrSkip
}
return string(buf), nil
}
func (mc *mysqlConn) Exec(query string, args []driver.Value) (driver.Result, error) {
if mc.closed.IsSet() {
errLog.Print(ErrInvalidConn)
return nil, driver.ErrBadConn
}
if len(args) != 0 {
if !mc.cfg.InterpolateParams {
return nil, driver.ErrSkip
}
// try to interpolate the parameters to save extra roundtrips for preparing and closing a statement
prepared, err := mc.interpolateParams(query, args)
if err != nil {
return nil, err
}
query = prepared
}
mc.affectedRows = 0
mc.insertId = 0
err := mc.exec(query)
if err == nil {
return &mysqlResult{
affectedRows: int64(mc.affectedRows),
insertId: int64(mc.insertId),
}, err
}
return nil, mc.markBadConn(err)
}
// Internal function to execute commands
func (mc *mysqlConn) exec(query string) error {
// Send command
if err := mc.writeCommandPacketStr(comQuery, query); err != nil {
return mc.markBadConn(err)
}
// Read Result
resLen, err := mc.readResultSetHeaderPacket()
if err != nil {
return err
}
if resLen > 0 {
// columns
if err := mc.readUntilEOF(); err != nil {
return err
}
// rows
if err := mc.readUntilEOF(); err != nil {
return err
}
}
return mc.discardResults()
}
func (mc *mysqlConn) Query(query string, args []driver.Value) (driver.Rows, error) {
return mc.query(query, args)
}
func (mc *mysqlConn) query(query string, args []driver.Value) (*textRows, error) {
if mc.closed.IsSet() {
errLog.Print(ErrInvalidConn)
return nil, driver.ErrBadConn
}
if len(args) != 0 {
if !mc.cfg.InterpolateParams {
return nil, driver.ErrSkip
}
// try client-side prepare to reduce roundtrip
prepared, err := mc.interpolateParams(query, args)
if err != nil {
return nil, err
}
query = prepared
}
// Send command
err := mc.writeCommandPacketStr(comQuery, query)
if err == nil {
// Read Result
var resLen int
resLen, err = mc.readResultSetHeaderPacket()
if err == nil {
rows := new(textRows)
rows.mc = mc
if resLen == 0 {
rows.rs.done = true
switch err := rows.NextResultSet(); err {
case nil, io.EOF:
return rows, nil
default:
return nil, err
}
}
// Columns
rows.rs.columns, err = mc.readColumns(resLen)
return rows, err
}
}
return nil, mc.markBadConn(err)
}
// Gets the value of the given MySQL System Variable
// The returned byte slice is only valid until the next read
func (mc *mysqlConn) getSystemVar(name string) ([]byte, error) {
// Send command
if err := mc.writeCommandPacketStr(comQuery, "SELECT @@"+name); err != nil {
return nil, err
}
// Read Result
resLen, err := mc.readResultSetHeaderPacket()
if err == nil {
rows := new(textRows)
rows.mc = mc
rows.rs.columns = []mysqlField{{fieldType: fieldTypeVarChar}}
if resLen > 0 {
// Columns
if err := mc.readUntilEOF(); err != nil {
return nil, err
}
}
dest := make([]driver.Value, resLen)
if err = rows.readRow(dest); err == nil {
return dest[0].([]byte), mc.readUntilEOF()
}
}
return nil, err
}
// finish is called when the query has canceled.
func (mc *mysqlConn) cancel(err error) {
mc.canceled.Set(err)
mc.cleanup()
}
// finish is called when the query has succeeded.
func (mc *mysqlConn) finish() {
if !mc.watching || mc.finished == nil {
return
}
select {
case mc.finished <- struct{}{}:
mc.watching = false
case <-mc.closech:
}
}
// Ping implements driver.Pinger interface
func (mc *mysqlConn) Ping(ctx context.Context) (err error) {
if mc.closed.IsSet() {
errLog.Print(ErrInvalidConn)
return driver.ErrBadConn
}
if err = mc.watchCancel(ctx); err != nil {
return
}
defer mc.finish()
if err = mc.writeCommandPacket(comPing); err != nil {
return mc.markBadConn(err)
}
return mc.readResultOK()
}
// BeginTx implements driver.ConnBeginTx interface
func (mc *mysqlConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
if err := mc.watchCancel(ctx); err != nil {
return nil, err
}
defer mc.finish()
if sql.IsolationLevel(opts.Isolation) != sql.LevelDefault {
level, err := mapIsolationLevel(opts.Isolation)
if err != nil {
return nil, err
}
err = mc.exec("SET TRANSACTION ISOLATION LEVEL " + level)
if err != nil {
return nil, err
}
}
return mc.begin(opts.ReadOnly)
}
func (mc *mysqlConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
dargs, err := namedValueToValue(args)
if err != nil {
return nil, err
}
if err := mc.watchCancel(ctx); err != nil {
return nil, err
}
rows, err := mc.query(query, dargs)
if err != nil {
mc.finish()
return nil, err
}
rows.finish = mc.finish
return rows, err
}
func (mc *mysqlConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
dargs, err := namedValueToValue(args)
if err != nil {
return nil, err
}
if err := mc.watchCancel(ctx); err != nil {
return nil, err
}
defer mc.finish()
return mc.Exec(query, dargs)
}
func (mc *mysqlConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
if err := mc.watchCancel(ctx); err != nil {
return nil, err
}
stmt, err := mc.Prepare(query)
mc.finish()
if err != nil {
return nil, err
}
select {
default:
case <-ctx.Done():
stmt.Close()
return nil, ctx.Err()
}
return stmt, nil
}
func (stmt *mysqlStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
dargs, err := namedValueToValue(args)
if err != nil {
return nil, err
}
if err := stmt.mc.watchCancel(ctx); err != nil {
return nil, err
}
rows, err := stmt.query(dargs)
if err != nil {
stmt.mc.finish()
return nil, err
}
rows.finish = stmt.mc.finish
return rows, err
}
func (stmt *mysqlStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
dargs, err := namedValueToValue(args)
if err != nil {
return nil, err
}
if err := stmt.mc.watchCancel(ctx); err != nil {
return nil, err
}
defer stmt.mc.finish()
return stmt.Exec(dargs)
}
func (mc *mysqlConn) watchCancel(ctx context.Context) error {
if mc.watching {
// Reach here if canceled,
// so the connection is already invalid
mc.cleanup()
return nil
}
// When ctx is already cancelled, don't watch it.
if err := ctx.Err(); err != nil {
return err
}
// When ctx is not cancellable, don't watch it.
if ctx.Done() == nil {
return nil
}
// When watcher is not alive, can't watch it.
if mc.watcher == nil {
return nil
}
mc.watching = true
mc.watcher <- ctx
return nil
}
func (mc *mysqlConn) startWatcher() {
watcher := make(chan context.Context, 1)
mc.watcher = watcher
finished := make(chan struct{})
mc.finished = finished
go func() {
for {
var ctx context.Context
select {
case ctx = <-watcher:
case <-mc.closech:
return
}
select {
case <-ctx.Done():
mc.cancel(ctx.Err())
case <-finished:
case <-mc.closech:
return
}
}
}()
}
func (mc *mysqlConn) CheckNamedValue(nv *driver.NamedValue) (err error) {
nv.Value, err = converter{}.ConvertValue(nv.Value)
return
}
// ResetSession implements driver.SessionResetter.
// (From Go 1.10)
func (mc *mysqlConn) ResetSession(ctx context.Context) error {
if mc.closed.IsSet() {
return driver.ErrBadConn
}
mc.reset = true
return nil
}

146
vendor/github.com/go-sql-driver/mysql/connector.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2018 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"context"
"database/sql/driver"
"net"
)
type connector struct {
cfg *Config // immutable private copy.
}
// Connect implements driver.Connector interface.
// Connect returns a connection to the database.
func (c *connector) Connect(ctx context.Context) (driver.Conn, error) {
var err error
// New mysqlConn
mc := &mysqlConn{
maxAllowedPacket: maxPacketSize,
maxWriteSize: maxPacketSize - 1,
closech: make(chan struct{}),
cfg: c.cfg,
}
mc.parseTime = mc.cfg.ParseTime
// Connect to Server
dialsLock.RLock()
dial, ok := dials[mc.cfg.Net]
dialsLock.RUnlock()
if ok {
dctx := ctx
if mc.cfg.Timeout > 0 {
var cancel context.CancelFunc
dctx, cancel = context.WithTimeout(ctx, c.cfg.Timeout)
defer cancel()
}
mc.netConn, err = dial(dctx, mc.cfg.Addr)
} else {
nd := net.Dialer{Timeout: mc.cfg.Timeout}
mc.netConn, err = nd.DialContext(ctx, mc.cfg.Net, mc.cfg.Addr)
}
if err != nil {
return nil, err
}
// Enable TCP Keepalives on TCP connections
if tc, ok := mc.netConn.(*net.TCPConn); ok {
if err := tc.SetKeepAlive(true); err != nil {
// Don't send COM_QUIT before handshake.
mc.netConn.Close()
mc.netConn = nil
return nil, err
}
}
// Call startWatcher for context support (From Go 1.8)
mc.startWatcher()
if err := mc.watchCancel(ctx); err != nil {
mc.cleanup()
return nil, err
}
defer mc.finish()
mc.buf = newBuffer(mc.netConn)
// Set I/O timeouts
mc.buf.timeout = mc.cfg.ReadTimeout
mc.writeTimeout = mc.cfg.WriteTimeout
// Reading Handshake Initialization Packet
authData, plugin, err := mc.readHandshakePacket()
if err != nil {
mc.cleanup()
return nil, err
}
if plugin == "" {
plugin = defaultAuthPlugin
}
// Send Client Authentication Packet
authResp, err := mc.auth(authData, plugin)
if err != nil {
// try the default auth plugin, if using the requested plugin failed
errLog.Print("could not use requested auth plugin '"+plugin+"': ", err.Error())
plugin = defaultAuthPlugin
authResp, err = mc.auth(authData, plugin)
if err != nil {
mc.cleanup()
return nil, err
}
}
if err = mc.writeHandshakeResponsePacket(authResp, plugin); err != nil {
mc.cleanup()
return nil, err
}
// Handle response to auth packet, switch methods if possible
if err = mc.handleAuthResult(authData, plugin); err != nil {
// Authentication failed and MySQL has already closed the connection
// (https://dev.mysql.com/doc/internals/en/authentication-fails.html).
// Do not send COM_QUIT, just cleanup and return the error.
mc.cleanup()
return nil, err
}
if mc.cfg.MaxAllowedPacket > 0 {
mc.maxAllowedPacket = mc.cfg.MaxAllowedPacket
} else {
// Get max allowed packet size
maxap, err := mc.getSystemVar("max_allowed_packet")
if err != nil {
mc.Close()
return nil, err
}
mc.maxAllowedPacket = stringToInt(maxap) - 1
}
if mc.maxAllowedPacket < maxPacketSize {
mc.maxWriteSize = mc.maxAllowedPacket
}
// Handle DSN Params
err = mc.handleParams()
if err != nil {
mc.Close()
return nil, err
}
return mc, nil
}
// Driver implements driver.Connector interface.
// Driver returns &MySQLDriver{}.
func (c *connector) Driver() driver.Driver {
return &MySQLDriver{}
}

174
vendor/github.com/go-sql-driver/mysql/const.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
const (
defaultAuthPlugin = "mysql_native_password"
defaultMaxAllowedPacket = 4 << 20 // 4 MiB
minProtocolVersion = 10
maxPacketSize = 1<<24 - 1
timeFormat = "2006-01-02 15:04:05.999999"
)
// MySQL constants documentation:
// http://dev.mysql.com/doc/internals/en/client-server-protocol.html
const (
iOK byte = 0x00
iAuthMoreData byte = 0x01
iLocalInFile byte = 0xfb
iEOF byte = 0xfe
iERR byte = 0xff
)
// https://dev.mysql.com/doc/internals/en/capability-flags.html#packet-Protocol::CapabilityFlags
type clientFlag uint32
const (
clientLongPassword clientFlag = 1 << iota
clientFoundRows
clientLongFlag
clientConnectWithDB
clientNoSchema
clientCompress
clientODBC
clientLocalFiles
clientIgnoreSpace
clientProtocol41
clientInteractive
clientSSL
clientIgnoreSIGPIPE
clientTransactions
clientReserved
clientSecureConn
clientMultiStatements
clientMultiResults
clientPSMultiResults
clientPluginAuth
clientConnectAttrs
clientPluginAuthLenEncClientData
clientCanHandleExpiredPasswords
clientSessionTrack
clientDeprecateEOF
)
const (
comQuit byte = iota + 1
comInitDB
comQuery
comFieldList
comCreateDB
comDropDB
comRefresh
comShutdown
comStatistics
comProcessInfo
comConnect
comProcessKill
comDebug
comPing
comTime
comDelayedInsert
comChangeUser
comBinlogDump
comTableDump
comConnectOut
comRegisterSlave
comStmtPrepare
comStmtExecute
comStmtSendLongData
comStmtClose
comStmtReset
comSetOption
comStmtFetch
)
// https://dev.mysql.com/doc/internals/en/com-query-response.html#packet-Protocol::ColumnType
type fieldType byte
const (
fieldTypeDecimal fieldType = iota
fieldTypeTiny
fieldTypeShort
fieldTypeLong
fieldTypeFloat
fieldTypeDouble
fieldTypeNULL
fieldTypeTimestamp
fieldTypeLongLong
fieldTypeInt24
fieldTypeDate
fieldTypeTime
fieldTypeDateTime
fieldTypeYear
fieldTypeNewDate
fieldTypeVarChar
fieldTypeBit
)
const (
fieldTypeJSON fieldType = iota + 0xf5
fieldTypeNewDecimal
fieldTypeEnum
fieldTypeSet
fieldTypeTinyBLOB
fieldTypeMediumBLOB
fieldTypeLongBLOB
fieldTypeBLOB
fieldTypeVarString
fieldTypeString
fieldTypeGeometry
)
type fieldFlag uint16
const (
flagNotNULL fieldFlag = 1 << iota
flagPriKey
flagUniqueKey
flagMultipleKey
flagBLOB
flagUnsigned
flagZeroFill
flagBinary
flagEnum
flagAutoIncrement
flagTimestamp
flagSet
flagUnknown1
flagUnknown2
flagUnknown3
flagUnknown4
)
// http://dev.mysql.com/doc/internals/en/status-flags.html
type statusFlag uint16
const (
statusInTrans statusFlag = 1 << iota
statusInAutocommit
statusReserved // Not in documentation
statusMoreResultsExists
statusNoGoodIndexUsed
statusNoIndexUsed
statusCursorExists
statusLastRowSent
statusDbDropped
statusNoBackslashEscapes
statusMetadataChanged
statusQueryWasSlow
statusPsOutParams
statusInTransReadonly
statusSessionStateChanged
)
const (
cachingSha2PasswordRequestPublicKey = 2
cachingSha2PasswordFastAuthSuccess = 3
cachingSha2PasswordPerformFullAuthentication = 4
)

107
vendor/github.com/go-sql-driver/mysql/driver.go generated vendored Normal file
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// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
// Package mysql provides a MySQL driver for Go's database/sql package.
//
// The driver should be used via the database/sql package:
//
// import "database/sql"
// import _ "github.com/go-sql-driver/mysql"
//
// db, err := sql.Open("mysql", "user:password@/dbname")
//
// See https://github.com/go-sql-driver/mysql#usage for details
package mysql
import (
"context"
"database/sql"
"database/sql/driver"
"net"
"sync"
)
// MySQLDriver is exported to make the driver directly accessible.
// In general the driver is used via the database/sql package.
type MySQLDriver struct{}
// DialFunc is a function which can be used to establish the network connection.
// Custom dial functions must be registered with RegisterDial
//
// Deprecated: users should register a DialContextFunc instead
type DialFunc func(addr string) (net.Conn, error)
// DialContextFunc is a function which can be used to establish the network connection.
// Custom dial functions must be registered with RegisterDialContext
type DialContextFunc func(ctx context.Context, addr string) (net.Conn, error)
var (
dialsLock sync.RWMutex
dials map[string]DialContextFunc
)
// RegisterDialContext registers a custom dial function. It can then be used by the
// network address mynet(addr), where mynet is the registered new network.
// The current context for the connection and its address is passed to the dial function.
func RegisterDialContext(net string, dial DialContextFunc) {
dialsLock.Lock()
defer dialsLock.Unlock()
if dials == nil {
dials = make(map[string]DialContextFunc)
}
dials[net] = dial
}
// RegisterDial registers a custom dial function. It can then be used by the
// network address mynet(addr), where mynet is the registered new network.
// addr is passed as a parameter to the dial function.
//
// Deprecated: users should call RegisterDialContext instead
func RegisterDial(network string, dial DialFunc) {
RegisterDialContext(network, func(_ context.Context, addr string) (net.Conn, error) {
return dial(addr)
})
}
// Open new Connection.
// See https://github.com/go-sql-driver/mysql#dsn-data-source-name for how
// the DSN string is formatted
func (d MySQLDriver) Open(dsn string) (driver.Conn, error) {
cfg, err := ParseDSN(dsn)
if err != nil {
return nil, err
}
c := &connector{
cfg: cfg,
}
return c.Connect(context.Background())
}
func init() {
sql.Register("mysql", &MySQLDriver{})
}
// NewConnector returns new driver.Connector.
func NewConnector(cfg *Config) (driver.Connector, error) {
cfg = cfg.Clone()
// normalize the contents of cfg so calls to NewConnector have the same
// behavior as MySQLDriver.OpenConnector
if err := cfg.normalize(); err != nil {
return nil, err
}
return &connector{cfg: cfg}, nil
}
// OpenConnector implements driver.DriverContext.
func (d MySQLDriver) OpenConnector(dsn string) (driver.Connector, error) {
cfg, err := ParseDSN(dsn)
if err != nil {
return nil, err
}
return &connector{
cfg: cfg,
}, nil
}

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vendor/github.com/go-sql-driver/mysql/dsn.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2016 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"bytes"
"crypto/rsa"
"crypto/tls"
"errors"
"fmt"
"math/big"
"net"
"net/url"
"sort"
"strconv"
"strings"
"time"
)
var (
errInvalidDSNUnescaped = errors.New("invalid DSN: did you forget to escape a param value?")
errInvalidDSNAddr = errors.New("invalid DSN: network address not terminated (missing closing brace)")
errInvalidDSNNoSlash = errors.New("invalid DSN: missing the slash separating the database name")
errInvalidDSNUnsafeCollation = errors.New("invalid DSN: interpolateParams can not be used with unsafe collations")
)
// Config is a configuration parsed from a DSN string.
// If a new Config is created instead of being parsed from a DSN string,
// the NewConfig function should be used, which sets default values.
type Config struct {
User string // Username
Passwd string // Password (requires User)
Net string // Network type
Addr string // Network address (requires Net)
DBName string // Database name
Params map[string]string // Connection parameters
Collation string // Connection collation
Loc *time.Location // Location for time.Time values
MaxAllowedPacket int // Max packet size allowed
ServerPubKey string // Server public key name
pubKey *rsa.PublicKey // Server public key
TLSConfig string // TLS configuration name
tls *tls.Config // TLS configuration
Timeout time.Duration // Dial timeout
ReadTimeout time.Duration // I/O read timeout
WriteTimeout time.Duration // I/O write timeout
AllowAllFiles bool // Allow all files to be used with LOAD DATA LOCAL INFILE
AllowCleartextPasswords bool // Allows the cleartext client side plugin
AllowNativePasswords bool // Allows the native password authentication method
AllowOldPasswords bool // Allows the old insecure password method
CheckConnLiveness bool // Check connections for liveness before using them
ClientFoundRows bool // Return number of matching rows instead of rows changed
ColumnsWithAlias bool // Prepend table alias to column names
InterpolateParams bool // Interpolate placeholders into query string
MultiStatements bool // Allow multiple statements in one query
ParseTime bool // Parse time values to time.Time
RejectReadOnly bool // Reject read-only connections
}
// NewConfig creates a new Config and sets default values.
func NewConfig() *Config {
return &Config{
Collation: defaultCollation,
Loc: time.UTC,
MaxAllowedPacket: defaultMaxAllowedPacket,
AllowNativePasswords: true,
CheckConnLiveness: true,
}
}
func (cfg *Config) Clone() *Config {
cp := *cfg
if cp.tls != nil {
cp.tls = cfg.tls.Clone()
}
if len(cp.Params) > 0 {
cp.Params = make(map[string]string, len(cfg.Params))
for k, v := range cfg.Params {
cp.Params[k] = v
}
}
if cfg.pubKey != nil {
cp.pubKey = &rsa.PublicKey{
N: new(big.Int).Set(cfg.pubKey.N),
E: cfg.pubKey.E,
}
}
return &cp
}
func (cfg *Config) normalize() error {
if cfg.InterpolateParams && unsafeCollations[cfg.Collation] {
return errInvalidDSNUnsafeCollation
}
// Set default network if empty
if cfg.Net == "" {
cfg.Net = "tcp"
}
// Set default address if empty
if cfg.Addr == "" {
switch cfg.Net {
case "tcp":
cfg.Addr = "127.0.0.1:3306"
case "unix":
cfg.Addr = "/tmp/mysql.sock"
default:
return errors.New("default addr for network '" + cfg.Net + "' unknown")
}
} else if cfg.Net == "tcp" {
cfg.Addr = ensureHavePort(cfg.Addr)
}
switch cfg.TLSConfig {
case "false", "":
// don't set anything
case "true":
cfg.tls = &tls.Config{}
case "skip-verify", "preferred":
cfg.tls = &tls.Config{InsecureSkipVerify: true}
default:
cfg.tls = getTLSConfigClone(cfg.TLSConfig)
if cfg.tls == nil {
return errors.New("invalid value / unknown config name: " + cfg.TLSConfig)
}
}
if cfg.tls != nil && cfg.tls.ServerName == "" && !cfg.tls.InsecureSkipVerify {
host, _, err := net.SplitHostPort(cfg.Addr)
if err == nil {
cfg.tls.ServerName = host
}
}
if cfg.ServerPubKey != "" {
cfg.pubKey = getServerPubKey(cfg.ServerPubKey)
if cfg.pubKey == nil {
return errors.New("invalid value / unknown server pub key name: " + cfg.ServerPubKey)
}
}
return nil
}
func writeDSNParam(buf *bytes.Buffer, hasParam *bool, name, value string) {
buf.Grow(1 + len(name) + 1 + len(value))
if !*hasParam {
*hasParam = true
buf.WriteByte('?')
} else {
buf.WriteByte('&')
}
buf.WriteString(name)
buf.WriteByte('=')
buf.WriteString(value)
}
// FormatDSN formats the given Config into a DSN string which can be passed to
// the driver.
func (cfg *Config) FormatDSN() string {
var buf bytes.Buffer
// [username[:password]@]
if len(cfg.User) > 0 {
buf.WriteString(cfg.User)
if len(cfg.Passwd) > 0 {
buf.WriteByte(':')
buf.WriteString(cfg.Passwd)
}
buf.WriteByte('@')
}
// [protocol[(address)]]
if len(cfg.Net) > 0 {
buf.WriteString(cfg.Net)
if len(cfg.Addr) > 0 {
buf.WriteByte('(')
buf.WriteString(cfg.Addr)
buf.WriteByte(')')
}
}
// /dbname
buf.WriteByte('/')
buf.WriteString(cfg.DBName)
// [?param1=value1&...&paramN=valueN]
hasParam := false
if cfg.AllowAllFiles {
hasParam = true
buf.WriteString("?allowAllFiles=true")
}
if cfg.AllowCleartextPasswords {
writeDSNParam(&buf, &hasParam, "allowCleartextPasswords", "true")
}
if !cfg.AllowNativePasswords {
writeDSNParam(&buf, &hasParam, "allowNativePasswords", "false")
}
if cfg.AllowOldPasswords {
writeDSNParam(&buf, &hasParam, "allowOldPasswords", "true")
}
if !cfg.CheckConnLiveness {
writeDSNParam(&buf, &hasParam, "checkConnLiveness", "false")
}
if cfg.ClientFoundRows {
writeDSNParam(&buf, &hasParam, "clientFoundRows", "true")
}
if col := cfg.Collation; col != defaultCollation && len(col) > 0 {
writeDSNParam(&buf, &hasParam, "collation", col)
}
if cfg.ColumnsWithAlias {
writeDSNParam(&buf, &hasParam, "columnsWithAlias", "true")
}
if cfg.InterpolateParams {
writeDSNParam(&buf, &hasParam, "interpolateParams", "true")
}
if cfg.Loc != time.UTC && cfg.Loc != nil {
writeDSNParam(&buf, &hasParam, "loc", url.QueryEscape(cfg.Loc.String()))
}
if cfg.MultiStatements {
writeDSNParam(&buf, &hasParam, "multiStatements", "true")
}
if cfg.ParseTime {
writeDSNParam(&buf, &hasParam, "parseTime", "true")
}
if cfg.ReadTimeout > 0 {
writeDSNParam(&buf, &hasParam, "readTimeout", cfg.ReadTimeout.String())
}
if cfg.RejectReadOnly {
writeDSNParam(&buf, &hasParam, "rejectReadOnly", "true")
}
if len(cfg.ServerPubKey) > 0 {
writeDSNParam(&buf, &hasParam, "serverPubKey", url.QueryEscape(cfg.ServerPubKey))
}
if cfg.Timeout > 0 {
writeDSNParam(&buf, &hasParam, "timeout", cfg.Timeout.String())
}
if len(cfg.TLSConfig) > 0 {
writeDSNParam(&buf, &hasParam, "tls", url.QueryEscape(cfg.TLSConfig))
}
if cfg.WriteTimeout > 0 {
writeDSNParam(&buf, &hasParam, "writeTimeout", cfg.WriteTimeout.String())
}
if cfg.MaxAllowedPacket != defaultMaxAllowedPacket {
writeDSNParam(&buf, &hasParam, "maxAllowedPacket", strconv.Itoa(cfg.MaxAllowedPacket))
}
// other params
if cfg.Params != nil {
var params []string
for param := range cfg.Params {
params = append(params, param)
}
sort.Strings(params)
for _, param := range params {
writeDSNParam(&buf, &hasParam, param, url.QueryEscape(cfg.Params[param]))
}
}
return buf.String()
}
// ParseDSN parses the DSN string to a Config
func ParseDSN(dsn string) (cfg *Config, err error) {
// New config with some default values
cfg = NewConfig()
// [user[:password]@][net[(addr)]]/dbname[?param1=value1&paramN=valueN]
// Find the last '/' (since the password or the net addr might contain a '/')
foundSlash := false
for i := len(dsn) - 1; i >= 0; i-- {
if dsn[i] == '/' {
foundSlash = true
var j, k int
// left part is empty if i <= 0
if i > 0 {
// [username[:password]@][protocol[(address)]]
// Find the last '@' in dsn[:i]
for j = i; j >= 0; j-- {
if dsn[j] == '@' {
// username[:password]
// Find the first ':' in dsn[:j]
for k = 0; k < j; k++ {
if dsn[k] == ':' {
cfg.Passwd = dsn[k+1 : j]
break
}
}
cfg.User = dsn[:k]
break
}
}
// [protocol[(address)]]
// Find the first '(' in dsn[j+1:i]
for k = j + 1; k < i; k++ {
if dsn[k] == '(' {
// dsn[i-1] must be == ')' if an address is specified
if dsn[i-1] != ')' {
if strings.ContainsRune(dsn[k+1:i], ')') {
return nil, errInvalidDSNUnescaped
}
return nil, errInvalidDSNAddr
}
cfg.Addr = dsn[k+1 : i-1]
break
}
}
cfg.Net = dsn[j+1 : k]
}
// dbname[?param1=value1&...&paramN=valueN]
// Find the first '?' in dsn[i+1:]
for j = i + 1; j < len(dsn); j++ {
if dsn[j] == '?' {
if err = parseDSNParams(cfg, dsn[j+1:]); err != nil {
return
}
break
}
}
cfg.DBName = dsn[i+1 : j]
break
}
}
if !foundSlash && len(dsn) > 0 {
return nil, errInvalidDSNNoSlash
}
if err = cfg.normalize(); err != nil {
return nil, err
}
return
}
// parseDSNParams parses the DSN "query string"
// Values must be url.QueryEscape'ed
func parseDSNParams(cfg *Config, params string) (err error) {
for _, v := range strings.Split(params, "&") {
param := strings.SplitN(v, "=", 2)
if len(param) != 2 {
continue
}
// cfg params
switch value := param[1]; param[0] {
// Disable INFILE whitelist / enable all files
case "allowAllFiles":
var isBool bool
cfg.AllowAllFiles, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
// Use cleartext authentication mode (MySQL 5.5.10+)
case "allowCleartextPasswords":
var isBool bool
cfg.AllowCleartextPasswords, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
// Use native password authentication
case "allowNativePasswords":
var isBool bool
cfg.AllowNativePasswords, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
// Use old authentication mode (pre MySQL 4.1)
case "allowOldPasswords":
var isBool bool
cfg.AllowOldPasswords, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
// Check connections for Liveness before using them
case "checkConnLiveness":
var isBool bool
cfg.CheckConnLiveness, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
// Switch "rowsAffected" mode
case "clientFoundRows":
var isBool bool
cfg.ClientFoundRows, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
// Collation
case "collation":
cfg.Collation = value
break
case "columnsWithAlias":
var isBool bool
cfg.ColumnsWithAlias, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
// Compression
case "compress":
return errors.New("compression not implemented yet")
// Enable client side placeholder substitution
case "interpolateParams":
var isBool bool
cfg.InterpolateParams, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
// Time Location
case "loc":
if value, err = url.QueryUnescape(value); err != nil {
return
}
cfg.Loc, err = time.LoadLocation(value)
if err != nil {
return
}
// multiple statements in one query
case "multiStatements":
var isBool bool
cfg.MultiStatements, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
// time.Time parsing
case "parseTime":
var isBool bool
cfg.ParseTime, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
// I/O read Timeout
case "readTimeout":
cfg.ReadTimeout, err = time.ParseDuration(value)
if err != nil {
return
}
// Reject read-only connections
case "rejectReadOnly":
var isBool bool
cfg.RejectReadOnly, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
// Server public key
case "serverPubKey":
name, err := url.QueryUnescape(value)
if err != nil {
return fmt.Errorf("invalid value for server pub key name: %v", err)
}
cfg.ServerPubKey = name
// Strict mode
case "strict":
panic("strict mode has been removed. See https://github.com/go-sql-driver/mysql/wiki/strict-mode")
// Dial Timeout
case "timeout":
cfg.Timeout, err = time.ParseDuration(value)
if err != nil {
return
}
// TLS-Encryption
case "tls":
boolValue, isBool := readBool(value)
if isBool {
if boolValue {
cfg.TLSConfig = "true"
} else {
cfg.TLSConfig = "false"
}
} else if vl := strings.ToLower(value); vl == "skip-verify" || vl == "preferred" {
cfg.TLSConfig = vl
} else {
name, err := url.QueryUnescape(value)
if err != nil {
return fmt.Errorf("invalid value for TLS config name: %v", err)
}
cfg.TLSConfig = name
}
// I/O write Timeout
case "writeTimeout":
cfg.WriteTimeout, err = time.ParseDuration(value)
if err != nil {
return
}
case "maxAllowedPacket":
cfg.MaxAllowedPacket, err = strconv.Atoi(value)
if err != nil {
return
}
default:
// lazy init
if cfg.Params == nil {
cfg.Params = make(map[string]string)
}
if cfg.Params[param[0]], err = url.QueryUnescape(value); err != nil {
return
}
}
}
return
}
func ensureHavePort(addr string) string {
if _, _, err := net.SplitHostPort(addr); err != nil {
return net.JoinHostPort(addr, "3306")
}
return addr
}

65
vendor/github.com/go-sql-driver/mysql/errors.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"errors"
"fmt"
"log"
"os"
)
// Various errors the driver might return. Can change between driver versions.
var (
ErrInvalidConn = errors.New("invalid connection")
ErrMalformPkt = errors.New("malformed packet")
ErrNoTLS = errors.New("TLS requested but server does not support TLS")
ErrCleartextPassword = errors.New("this user requires clear text authentication. If you still want to use it, please add 'allowCleartextPasswords=1' to your DSN")
ErrNativePassword = errors.New("this user requires mysql native password authentication.")
ErrOldPassword = errors.New("this user requires old password authentication. If you still want to use it, please add 'allowOldPasswords=1' to your DSN. See also https://github.com/go-sql-driver/mysql/wiki/old_passwords")
ErrUnknownPlugin = errors.New("this authentication plugin is not supported")
ErrOldProtocol = errors.New("MySQL server does not support required protocol 41+")
ErrPktSync = errors.New("commands out of sync. You can't run this command now")
ErrPktSyncMul = errors.New("commands out of sync. Did you run multiple statements at once?")
ErrPktTooLarge = errors.New("packet for query is too large. Try adjusting the 'max_allowed_packet' variable on the server")
ErrBusyBuffer = errors.New("busy buffer")
// errBadConnNoWrite is used for connection errors where nothing was sent to the database yet.
// If this happens first in a function starting a database interaction, it should be replaced by driver.ErrBadConn
// to trigger a resend.
// See https://github.com/go-sql-driver/mysql/pull/302
errBadConnNoWrite = errors.New("bad connection")
)
var errLog = Logger(log.New(os.Stderr, "[mysql] ", log.Ldate|log.Ltime|log.Lshortfile))
// Logger is used to log critical error messages.
type Logger interface {
Print(v ...interface{})
}
// SetLogger is used to set the logger for critical errors.
// The initial logger is os.Stderr.
func SetLogger(logger Logger) error {
if logger == nil {
return errors.New("logger is nil")
}
errLog = logger
return nil
}
// MySQLError is an error type which represents a single MySQL error
type MySQLError struct {
Number uint16
Message string
}
func (me *MySQLError) Error() string {
return fmt.Sprintf("Error %d: %s", me.Number, me.Message)
}

194
vendor/github.com/go-sql-driver/mysql/fields.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2017 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"database/sql"
"reflect"
)
func (mf *mysqlField) typeDatabaseName() string {
switch mf.fieldType {
case fieldTypeBit:
return "BIT"
case fieldTypeBLOB:
if mf.charSet != collations[binaryCollation] {
return "TEXT"
}
return "BLOB"
case fieldTypeDate:
return "DATE"
case fieldTypeDateTime:
return "DATETIME"
case fieldTypeDecimal:
return "DECIMAL"
case fieldTypeDouble:
return "DOUBLE"
case fieldTypeEnum:
return "ENUM"
case fieldTypeFloat:
return "FLOAT"
case fieldTypeGeometry:
return "GEOMETRY"
case fieldTypeInt24:
return "MEDIUMINT"
case fieldTypeJSON:
return "JSON"
case fieldTypeLong:
return "INT"
case fieldTypeLongBLOB:
if mf.charSet != collations[binaryCollation] {
return "LONGTEXT"
}
return "LONGBLOB"
case fieldTypeLongLong:
return "BIGINT"
case fieldTypeMediumBLOB:
if mf.charSet != collations[binaryCollation] {
return "MEDIUMTEXT"
}
return "MEDIUMBLOB"
case fieldTypeNewDate:
return "DATE"
case fieldTypeNewDecimal:
return "DECIMAL"
case fieldTypeNULL:
return "NULL"
case fieldTypeSet:
return "SET"
case fieldTypeShort:
return "SMALLINT"
case fieldTypeString:
if mf.charSet == collations[binaryCollation] {
return "BINARY"
}
return "CHAR"
case fieldTypeTime:
return "TIME"
case fieldTypeTimestamp:
return "TIMESTAMP"
case fieldTypeTiny:
return "TINYINT"
case fieldTypeTinyBLOB:
if mf.charSet != collations[binaryCollation] {
return "TINYTEXT"
}
return "TINYBLOB"
case fieldTypeVarChar:
if mf.charSet == collations[binaryCollation] {
return "VARBINARY"
}
return "VARCHAR"
case fieldTypeVarString:
if mf.charSet == collations[binaryCollation] {
return "VARBINARY"
}
return "VARCHAR"
case fieldTypeYear:
return "YEAR"
default:
return ""
}
}
var (
scanTypeFloat32 = reflect.TypeOf(float32(0))
scanTypeFloat64 = reflect.TypeOf(float64(0))
scanTypeInt8 = reflect.TypeOf(int8(0))
scanTypeInt16 = reflect.TypeOf(int16(0))
scanTypeInt32 = reflect.TypeOf(int32(0))
scanTypeInt64 = reflect.TypeOf(int64(0))
scanTypeNullFloat = reflect.TypeOf(sql.NullFloat64{})
scanTypeNullInt = reflect.TypeOf(sql.NullInt64{})
scanTypeNullTime = reflect.TypeOf(NullTime{})
scanTypeUint8 = reflect.TypeOf(uint8(0))
scanTypeUint16 = reflect.TypeOf(uint16(0))
scanTypeUint32 = reflect.TypeOf(uint32(0))
scanTypeUint64 = reflect.TypeOf(uint64(0))
scanTypeRawBytes = reflect.TypeOf(sql.RawBytes{})
scanTypeUnknown = reflect.TypeOf(new(interface{}))
)
type mysqlField struct {
tableName string
name string
length uint32
flags fieldFlag
fieldType fieldType
decimals byte
charSet uint8
}
func (mf *mysqlField) scanType() reflect.Type {
switch mf.fieldType {
case fieldTypeTiny:
if mf.flags&flagNotNULL != 0 {
if mf.flags&flagUnsigned != 0 {
return scanTypeUint8
}
return scanTypeInt8
}
return scanTypeNullInt
case fieldTypeShort, fieldTypeYear:
if mf.flags&flagNotNULL != 0 {
if mf.flags&flagUnsigned != 0 {
return scanTypeUint16
}
return scanTypeInt16
}
return scanTypeNullInt
case fieldTypeInt24, fieldTypeLong:
if mf.flags&flagNotNULL != 0 {
if mf.flags&flagUnsigned != 0 {
return scanTypeUint32
}
return scanTypeInt32
}
return scanTypeNullInt
case fieldTypeLongLong:
if mf.flags&flagNotNULL != 0 {
if mf.flags&flagUnsigned != 0 {
return scanTypeUint64
}
return scanTypeInt64
}
return scanTypeNullInt
case fieldTypeFloat:
if mf.flags&flagNotNULL != 0 {
return scanTypeFloat32
}
return scanTypeNullFloat
case fieldTypeDouble:
if mf.flags&flagNotNULL != 0 {
return scanTypeFloat64
}
return scanTypeNullFloat
case fieldTypeDecimal, fieldTypeNewDecimal, fieldTypeVarChar,
fieldTypeBit, fieldTypeEnum, fieldTypeSet, fieldTypeTinyBLOB,
fieldTypeMediumBLOB, fieldTypeLongBLOB, fieldTypeBLOB,
fieldTypeVarString, fieldTypeString, fieldTypeGeometry, fieldTypeJSON,
fieldTypeTime:
return scanTypeRawBytes
case fieldTypeDate, fieldTypeNewDate,
fieldTypeTimestamp, fieldTypeDateTime:
// NullTime is always returned for more consistent behavior as it can
// handle both cases of parseTime regardless if the field is nullable.
return scanTypeNullTime
default:
return scanTypeUnknown
}
}

182
vendor/github.com/go-sql-driver/mysql/infile.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"fmt"
"io"
"os"
"strings"
"sync"
)
var (
fileRegister map[string]bool
fileRegisterLock sync.RWMutex
readerRegister map[string]func() io.Reader
readerRegisterLock sync.RWMutex
)
// RegisterLocalFile adds the given file to the file whitelist,
// so that it can be used by "LOAD DATA LOCAL INFILE <filepath>".
// Alternatively you can allow the use of all local files with
// the DSN parameter 'allowAllFiles=true'
//
// filePath := "/home/gopher/data.csv"
// mysql.RegisterLocalFile(filePath)
// err := db.Exec("LOAD DATA LOCAL INFILE '" + filePath + "' INTO TABLE foo")
// if err != nil {
// ...
//
func RegisterLocalFile(filePath string) {
fileRegisterLock.Lock()
// lazy map init
if fileRegister == nil {
fileRegister = make(map[string]bool)
}
fileRegister[strings.Trim(filePath, `"`)] = true
fileRegisterLock.Unlock()
}
// DeregisterLocalFile removes the given filepath from the whitelist.
func DeregisterLocalFile(filePath string) {
fileRegisterLock.Lock()
delete(fileRegister, strings.Trim(filePath, `"`))
fileRegisterLock.Unlock()
}
// RegisterReaderHandler registers a handler function which is used
// to receive a io.Reader.
// The Reader can be used by "LOAD DATA LOCAL INFILE Reader::<name>".
// If the handler returns a io.ReadCloser Close() is called when the
// request is finished.
//
// mysql.RegisterReaderHandler("data", func() io.Reader {
// var csvReader io.Reader // Some Reader that returns CSV data
// ... // Open Reader here
// return csvReader
// })
// err := db.Exec("LOAD DATA LOCAL INFILE 'Reader::data' INTO TABLE foo")
// if err != nil {
// ...
//
func RegisterReaderHandler(name string, handler func() io.Reader) {
readerRegisterLock.Lock()
// lazy map init
if readerRegister == nil {
readerRegister = make(map[string]func() io.Reader)
}
readerRegister[name] = handler
readerRegisterLock.Unlock()
}
// DeregisterReaderHandler removes the ReaderHandler function with
// the given name from the registry.
func DeregisterReaderHandler(name string) {
readerRegisterLock.Lock()
delete(readerRegister, name)
readerRegisterLock.Unlock()
}
func deferredClose(err *error, closer io.Closer) {
closeErr := closer.Close()
if *err == nil {
*err = closeErr
}
}
func (mc *mysqlConn) handleInFileRequest(name string) (err error) {
var rdr io.Reader
var data []byte
packetSize := 16 * 1024 // 16KB is small enough for disk readahead and large enough for TCP
if mc.maxWriteSize < packetSize {
packetSize = mc.maxWriteSize
}
if idx := strings.Index(name, "Reader::"); idx == 0 || (idx > 0 && name[idx-1] == '/') { // io.Reader
// The server might return an an absolute path. See issue #355.
name = name[idx+8:]
readerRegisterLock.RLock()
handler, inMap := readerRegister[name]
readerRegisterLock.RUnlock()
if inMap {
rdr = handler()
if rdr != nil {
if cl, ok := rdr.(io.Closer); ok {
defer deferredClose(&err, cl)
}
} else {
err = fmt.Errorf("Reader '%s' is <nil>", name)
}
} else {
err = fmt.Errorf("Reader '%s' is not registered", name)
}
} else { // File
name = strings.Trim(name, `"`)
fileRegisterLock.RLock()
fr := fileRegister[name]
fileRegisterLock.RUnlock()
if mc.cfg.AllowAllFiles || fr {
var file *os.File
var fi os.FileInfo
if file, err = os.Open(name); err == nil {
defer deferredClose(&err, file)
// get file size
if fi, err = file.Stat(); err == nil {
rdr = file
if fileSize := int(fi.Size()); fileSize < packetSize {
packetSize = fileSize
}
}
}
} else {
err = fmt.Errorf("local file '%s' is not registered", name)
}
}
// send content packets
// if packetSize == 0, the Reader contains no data
if err == nil && packetSize > 0 {
data := make([]byte, 4+packetSize)
var n int
for err == nil {
n, err = rdr.Read(data[4:])
if n > 0 {
if ioErr := mc.writePacket(data[:4+n]); ioErr != nil {
return ioErr
}
}
}
if err == io.EOF {
err = nil
}
}
// send empty packet (termination)
if data == nil {
data = make([]byte, 4)
}
if ioErr := mc.writePacket(data[:4]); ioErr != nil {
return ioErr
}
// read OK packet
if err == nil {
return mc.readResultOK()
}
mc.readPacket()
return err
}

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vendor/github.com/go-sql-driver/mysql/nulltime.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"database/sql/driver"
"fmt"
"time"
)
// Scan implements the Scanner interface.
// The value type must be time.Time or string / []byte (formatted time-string),
// otherwise Scan fails.
func (nt *NullTime) Scan(value interface{}) (err error) {
if value == nil {
nt.Time, nt.Valid = time.Time{}, false
return
}
switch v := value.(type) {
case time.Time:
nt.Time, nt.Valid = v, true
return
case []byte:
nt.Time, err = parseDateTime(string(v), time.UTC)
nt.Valid = (err == nil)
return
case string:
nt.Time, err = parseDateTime(v, time.UTC)
nt.Valid = (err == nil)
return
}
nt.Valid = false
return fmt.Errorf("Can't convert %T to time.Time", value)
}
// Value implements the driver Valuer interface.
func (nt NullTime) Value() (driver.Value, error) {
if !nt.Valid {
return nil, nil
}
return nt.Time, nil
}

31
vendor/github.com/go-sql-driver/mysql/nulltime_go113.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
// +build go1.13
package mysql
import (
"database/sql"
)
// NullTime represents a time.Time that may be NULL.
// NullTime implements the Scanner interface so
// it can be used as a scan destination:
//
// var nt NullTime
// err := db.QueryRow("SELECT time FROM foo WHERE id=?", id).Scan(&nt)
// ...
// if nt.Valid {
// // use nt.Time
// } else {
// // NULL value
// }
//
// This NullTime implementation is not driver-specific
type NullTime sql.NullTime

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vendor/github.com/go-sql-driver/mysql/nulltime_legacy.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
// +build !go1.13
package mysql
import (
"time"
)
// NullTime represents a time.Time that may be NULL.
// NullTime implements the Scanner interface so
// it can be used as a scan destination:
//
// var nt NullTime
// err := db.QueryRow("SELECT time FROM foo WHERE id=?", id).Scan(&nt)
// ...
// if nt.Valid {
// // use nt.Time
// } else {
// // NULL value
// }
//
// This NullTime implementation is not driver-specific
type NullTime struct {
Time time.Time
Valid bool // Valid is true if Time is not NULL
}

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vendor/github.com/go-sql-driver/mysql/packets.go generated vendored Normal file
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22
vendor/github.com/go-sql-driver/mysql/result.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
type mysqlResult struct {
affectedRows int64
insertId int64
}
func (res *mysqlResult) LastInsertId() (int64, error) {
return res.insertId, nil
}
func (res *mysqlResult) RowsAffected() (int64, error) {
return res.affectedRows, nil
}

223
vendor/github.com/go-sql-driver/mysql/rows.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"database/sql/driver"
"io"
"math"
"reflect"
)
type resultSet struct {
columns []mysqlField
columnNames []string
done bool
}
type mysqlRows struct {
mc *mysqlConn
rs resultSet
finish func()
}
type binaryRows struct {
mysqlRows
}
type textRows struct {
mysqlRows
}
func (rows *mysqlRows) Columns() []string {
if rows.rs.columnNames != nil {
return rows.rs.columnNames
}
columns := make([]string, len(rows.rs.columns))
if rows.mc != nil && rows.mc.cfg.ColumnsWithAlias {
for i := range columns {
if tableName := rows.rs.columns[i].tableName; len(tableName) > 0 {
columns[i] = tableName + "." + rows.rs.columns[i].name
} else {
columns[i] = rows.rs.columns[i].name
}
}
} else {
for i := range columns {
columns[i] = rows.rs.columns[i].name
}
}
rows.rs.columnNames = columns
return columns
}
func (rows *mysqlRows) ColumnTypeDatabaseTypeName(i int) string {
return rows.rs.columns[i].typeDatabaseName()
}
// func (rows *mysqlRows) ColumnTypeLength(i int) (length int64, ok bool) {
// return int64(rows.rs.columns[i].length), true
// }
func (rows *mysqlRows) ColumnTypeNullable(i int) (nullable, ok bool) {
return rows.rs.columns[i].flags&flagNotNULL == 0, true
}
func (rows *mysqlRows) ColumnTypePrecisionScale(i int) (int64, int64, bool) {
column := rows.rs.columns[i]
decimals := int64(column.decimals)
switch column.fieldType {
case fieldTypeDecimal, fieldTypeNewDecimal:
if decimals > 0 {
return int64(column.length) - 2, decimals, true
}
return int64(column.length) - 1, decimals, true
case fieldTypeTimestamp, fieldTypeDateTime, fieldTypeTime:
return decimals, decimals, true
case fieldTypeFloat, fieldTypeDouble:
if decimals == 0x1f {
return math.MaxInt64, math.MaxInt64, true
}
return math.MaxInt64, decimals, true
}
return 0, 0, false
}
func (rows *mysqlRows) ColumnTypeScanType(i int) reflect.Type {
return rows.rs.columns[i].scanType()
}
func (rows *mysqlRows) Close() (err error) {
if f := rows.finish; f != nil {
f()
rows.finish = nil
}
mc := rows.mc
if mc == nil {
return nil
}
if err := mc.error(); err != nil {
return err
}
// flip the buffer for this connection if we need to drain it.
// note that for a successful query (i.e. one where rows.next()
// has been called until it returns false), `rows.mc` will be nil
// by the time the user calls `(*Rows).Close`, so we won't reach this
// see: https://github.com/golang/go/commit/651ddbdb5056ded455f47f9c494c67b389622a47
mc.buf.flip()
// Remove unread packets from stream
if !rows.rs.done {
err = mc.readUntilEOF()
}
if err == nil {
if err = mc.discardResults(); err != nil {
return err
}
}
rows.mc = nil
return err
}
func (rows *mysqlRows) HasNextResultSet() (b bool) {
if rows.mc == nil {
return false
}
return rows.mc.status&statusMoreResultsExists != 0
}
func (rows *mysqlRows) nextResultSet() (int, error) {
if rows.mc == nil {
return 0, io.EOF
}
if err := rows.mc.error(); err != nil {
return 0, err
}
// Remove unread packets from stream
if !rows.rs.done {
if err := rows.mc.readUntilEOF(); err != nil {
return 0, err
}
rows.rs.done = true
}
if !rows.HasNextResultSet() {
rows.mc = nil
return 0, io.EOF
}
rows.rs = resultSet{}
return rows.mc.readResultSetHeaderPacket()
}
func (rows *mysqlRows) nextNotEmptyResultSet() (int, error) {
for {
resLen, err := rows.nextResultSet()
if err != nil {
return 0, err
}
if resLen > 0 {
return resLen, nil
}
rows.rs.done = true
}
}
func (rows *binaryRows) NextResultSet() error {
resLen, err := rows.nextNotEmptyResultSet()
if err != nil {
return err
}
rows.rs.columns, err = rows.mc.readColumns(resLen)
return err
}
func (rows *binaryRows) Next(dest []driver.Value) error {
if mc := rows.mc; mc != nil {
if err := mc.error(); err != nil {
return err
}
// Fetch next row from stream
return rows.readRow(dest)
}
return io.EOF
}
func (rows *textRows) NextResultSet() (err error) {
resLen, err := rows.nextNotEmptyResultSet()
if err != nil {
return err
}
rows.rs.columns, err = rows.mc.readColumns(resLen)
return err
}
func (rows *textRows) Next(dest []driver.Value) error {
if mc := rows.mc; mc != nil {
if err := mc.error(); err != nil {
return err
}
// Fetch next row from stream
return rows.readRow(dest)
}
return io.EOF
}

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vendor/github.com/go-sql-driver/mysql/statement.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"database/sql/driver"
"fmt"
"io"
"reflect"
)
type mysqlStmt struct {
mc *mysqlConn
id uint32
paramCount int
}
func (stmt *mysqlStmt) Close() error {
if stmt.mc == nil || stmt.mc.closed.IsSet() {
// driver.Stmt.Close can be called more than once, thus this function
// has to be idempotent.
// See also Issue #450 and golang/go#16019.
//errLog.Print(ErrInvalidConn)
return driver.ErrBadConn
}
err := stmt.mc.writeCommandPacketUint32(comStmtClose, stmt.id)
stmt.mc = nil
return err
}
func (stmt *mysqlStmt) NumInput() int {
return stmt.paramCount
}
func (stmt *mysqlStmt) ColumnConverter(idx int) driver.ValueConverter {
return converter{}
}
func (stmt *mysqlStmt) Exec(args []driver.Value) (driver.Result, error) {
if stmt.mc.closed.IsSet() {
errLog.Print(ErrInvalidConn)
return nil, driver.ErrBadConn
}
// Send command
err := stmt.writeExecutePacket(args)
if err != nil {
return nil, stmt.mc.markBadConn(err)
}
mc := stmt.mc
mc.affectedRows = 0
mc.insertId = 0
// Read Result
resLen, err := mc.readResultSetHeaderPacket()
if err != nil {
return nil, err
}
if resLen > 0 {
// Columns
if err = mc.readUntilEOF(); err != nil {
return nil, err
}
// Rows
if err := mc.readUntilEOF(); err != nil {
return nil, err
}
}
if err := mc.discardResults(); err != nil {
return nil, err
}
return &mysqlResult{
affectedRows: int64(mc.affectedRows),
insertId: int64(mc.insertId),
}, nil
}
func (stmt *mysqlStmt) Query(args []driver.Value) (driver.Rows, error) {
return stmt.query(args)
}
func (stmt *mysqlStmt) query(args []driver.Value) (*binaryRows, error) {
if stmt.mc.closed.IsSet() {
errLog.Print(ErrInvalidConn)
return nil, driver.ErrBadConn
}
// Send command
err := stmt.writeExecutePacket(args)
if err != nil {
return nil, stmt.mc.markBadConn(err)
}
mc := stmt.mc
// Read Result
resLen, err := mc.readResultSetHeaderPacket()
if err != nil {
return nil, err
}
rows := new(binaryRows)
if resLen > 0 {
rows.mc = mc
rows.rs.columns, err = mc.readColumns(resLen)
} else {
rows.rs.done = true
switch err := rows.NextResultSet(); err {
case nil, io.EOF:
return rows, nil
default:
return nil, err
}
}
return rows, err
}
type converter struct{}
// ConvertValue mirrors the reference/default converter in database/sql/driver
// with _one_ exception. We support uint64 with their high bit and the default
// implementation does not. This function should be kept in sync with
// database/sql/driver defaultConverter.ConvertValue() except for that
// deliberate difference.
func (c converter) ConvertValue(v interface{}) (driver.Value, error) {
if driver.IsValue(v) {
return v, nil
}
if vr, ok := v.(driver.Valuer); ok {
sv, err := callValuerValue(vr)
if err != nil {
return nil, err
}
if !driver.IsValue(sv) {
return nil, fmt.Errorf("non-Value type %T returned from Value", sv)
}
return sv, nil
}
rv := reflect.ValueOf(v)
switch rv.Kind() {
case reflect.Ptr:
// indirect pointers
if rv.IsNil() {
return nil, nil
} else {
return c.ConvertValue(rv.Elem().Interface())
}
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return rv.Int(), nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return rv.Uint(), nil
case reflect.Float32, reflect.Float64:
return rv.Float(), nil
case reflect.Bool:
return rv.Bool(), nil
case reflect.Slice:
ek := rv.Type().Elem().Kind()
if ek == reflect.Uint8 {
return rv.Bytes(), nil
}
return nil, fmt.Errorf("unsupported type %T, a slice of %s", v, ek)
case reflect.String:
return rv.String(), nil
}
return nil, fmt.Errorf("unsupported type %T, a %s", v, rv.Kind())
}
var valuerReflectType = reflect.TypeOf((*driver.Valuer)(nil)).Elem()
// callValuerValue returns vr.Value(), with one exception:
// If vr.Value is an auto-generated method on a pointer type and the
// pointer is nil, it would panic at runtime in the panicwrap
// method. Treat it like nil instead.
//
// This is so people can implement driver.Value on value types and
// still use nil pointers to those types to mean nil/NULL, just like
// string/*string.
//
// This is an exact copy of the same-named unexported function from the
// database/sql package.
func callValuerValue(vr driver.Valuer) (v driver.Value, err error) {
if rv := reflect.ValueOf(vr); rv.Kind() == reflect.Ptr &&
rv.IsNil() &&
rv.Type().Elem().Implements(valuerReflectType) {
return nil, nil
}
return vr.Value()
}

31
vendor/github.com/go-sql-driver/mysql/transaction.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
type mysqlTx struct {
mc *mysqlConn
}
func (tx *mysqlTx) Commit() (err error) {
if tx.mc == nil || tx.mc.closed.IsSet() {
return ErrInvalidConn
}
err = tx.mc.exec("COMMIT")
tx.mc = nil
return
}
func (tx *mysqlTx) Rollback() (err error) {
if tx.mc == nil || tx.mc.closed.IsSet() {
return ErrInvalidConn
}
err = tx.mc.exec("ROLLBACK")
tx.mc = nil
return
}

701
vendor/github.com/go-sql-driver/mysql/utils.go generated vendored Normal file
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"crypto/tls"
"database/sql"
"database/sql/driver"
"encoding/binary"
"errors"
"fmt"
"io"
"strconv"
"strings"
"sync"
"sync/atomic"
"time"
)
// Registry for custom tls.Configs
var (
tlsConfigLock sync.RWMutex
tlsConfigRegistry map[string]*tls.Config
)
// RegisterTLSConfig registers a custom tls.Config to be used with sql.Open.
// Use the key as a value in the DSN where tls=value.
//
// Note: The provided tls.Config is exclusively owned by the driver after
// registering it.
//
// rootCertPool := x509.NewCertPool()
// pem, err := ioutil.ReadFile("/path/ca-cert.pem")
// if err != nil {
// log.Fatal(err)
// }
// if ok := rootCertPool.AppendCertsFromPEM(pem); !ok {
// log.Fatal("Failed to append PEM.")
// }
// clientCert := make([]tls.Certificate, 0, 1)
// certs, err := tls.LoadX509KeyPair("/path/client-cert.pem", "/path/client-key.pem")
// if err != nil {
// log.Fatal(err)
// }
// clientCert = append(clientCert, certs)
// mysql.RegisterTLSConfig("custom", &tls.Config{
// RootCAs: rootCertPool,
// Certificates: clientCert,
// })
// db, err := sql.Open("mysql", "user@tcp(localhost:3306)/test?tls=custom")
//
func RegisterTLSConfig(key string, config *tls.Config) error {
if _, isBool := readBool(key); isBool || strings.ToLower(key) == "skip-verify" || strings.ToLower(key) == "preferred" {
return fmt.Errorf("key '%s' is reserved", key)
}
tlsConfigLock.Lock()
if tlsConfigRegistry == nil {
tlsConfigRegistry = make(map[string]*tls.Config)
}
tlsConfigRegistry[key] = config
tlsConfigLock.Unlock()
return nil
}
// DeregisterTLSConfig removes the tls.Config associated with key.
func DeregisterTLSConfig(key string) {
tlsConfigLock.Lock()
if tlsConfigRegistry != nil {
delete(tlsConfigRegistry, key)
}
tlsConfigLock.Unlock()
}
func getTLSConfigClone(key string) (config *tls.Config) {
tlsConfigLock.RLock()
if v, ok := tlsConfigRegistry[key]; ok {
config = v.Clone()
}
tlsConfigLock.RUnlock()
return
}
// Returns the bool value of the input.
// The 2nd return value indicates if the input was a valid bool value
func readBool(input string) (value bool, valid bool) {
switch input {
case "1", "true", "TRUE", "True":
return true, true
case "0", "false", "FALSE", "False":
return false, true
}
// Not a valid bool value
return
}
/******************************************************************************
* Time related utils *
******************************************************************************/
func parseDateTime(str string, loc *time.Location) (t time.Time, err error) {
base := "0000-00-00 00:00:00.0000000"
switch len(str) {
case 10, 19, 21, 22, 23, 24, 25, 26: // up to "YYYY-MM-DD HH:MM:SS.MMMMMM"
if str == base[:len(str)] {
return
}
t, err = time.Parse(timeFormat[:len(str)], str)
default:
err = fmt.Errorf("invalid time string: %s", str)
return
}
// Adjust location
if err == nil && loc != time.UTC {
y, mo, d := t.Date()
h, mi, s := t.Clock()
t, err = time.Date(y, mo, d, h, mi, s, t.Nanosecond(), loc), nil
}
return
}
func parseBinaryDateTime(num uint64, data []byte, loc *time.Location) (driver.Value, error) {
switch num {
case 0:
return time.Time{}, nil
case 4:
return time.Date(
int(binary.LittleEndian.Uint16(data[:2])), // year
time.Month(data[2]), // month
int(data[3]), // day
0, 0, 0, 0,
loc,
), nil
case 7:
return time.Date(
int(binary.LittleEndian.Uint16(data[:2])), // year
time.Month(data[2]), // month
int(data[3]), // day
int(data[4]), // hour
int(data[5]), // minutes
int(data[6]), // seconds
0,
loc,
), nil
case 11:
return time.Date(
int(binary.LittleEndian.Uint16(data[:2])), // year
time.Month(data[2]), // month
int(data[3]), // day
int(data[4]), // hour
int(data[5]), // minutes
int(data[6]), // seconds
int(binary.LittleEndian.Uint32(data[7:11]))*1000, // nanoseconds
loc,
), nil
}
return nil, fmt.Errorf("invalid DATETIME packet length %d", num)
}
// zeroDateTime is used in formatBinaryDateTime to avoid an allocation
// if the DATE or DATETIME has the zero value.
// It must never be changed.
// The current behavior depends on database/sql copying the result.
var zeroDateTime = []byte("0000-00-00 00:00:00.000000")
const digits01 = "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789"
const digits10 = "0000000000111111111122222222223333333333444444444455555555556666666666777777777788888888889999999999"
func appendMicrosecs(dst, src []byte, decimals int) []byte {
if decimals <= 0 {
return dst
}
if len(src) == 0 {
return append(dst, ".000000"[:decimals+1]...)
}
microsecs := binary.LittleEndian.Uint32(src[:4])
p1 := byte(microsecs / 10000)
microsecs -= 10000 * uint32(p1)
p2 := byte(microsecs / 100)
microsecs -= 100 * uint32(p2)
p3 := byte(microsecs)
switch decimals {
default:
return append(dst, '.',
digits10[p1], digits01[p1],
digits10[p2], digits01[p2],
digits10[p3], digits01[p3],
)
case 1:
return append(dst, '.',
digits10[p1],
)
case 2:
return append(dst, '.',
digits10[p1], digits01[p1],
)
case 3:
return append(dst, '.',
digits10[p1], digits01[p1],
digits10[p2],
)
case 4:
return append(dst, '.',
digits10[p1], digits01[p1],
digits10[p2], digits01[p2],
)
case 5:
return append(dst, '.',
digits10[p1], digits01[p1],
digits10[p2], digits01[p2],
digits10[p3],
)
}
}
func formatBinaryDateTime(src []byte, length uint8) (driver.Value, error) {
// length expects the deterministic length of the zero value,
// negative time and 100+ hours are automatically added if needed
if len(src) == 0 {
return zeroDateTime[:length], nil
}
var dst []byte // return value
var p1, p2, p3 byte // current digit pair
switch length {
case 10, 19, 21, 22, 23, 24, 25, 26:
default:
t := "DATE"
if length > 10 {
t += "TIME"
}
return nil, fmt.Errorf("illegal %s length %d", t, length)
}
switch len(src) {
case 4, 7, 11:
default:
t := "DATE"
if length > 10 {
t += "TIME"
}
return nil, fmt.Errorf("illegal %s packet length %d", t, len(src))
}
dst = make([]byte, 0, length)
// start with the date
year := binary.LittleEndian.Uint16(src[:2])
pt := year / 100
p1 = byte(year - 100*uint16(pt))
p2, p3 = src[2], src[3]
dst = append(dst,
digits10[pt], digits01[pt],
digits10[p1], digits01[p1], '-',
digits10[p2], digits01[p2], '-',
digits10[p3], digits01[p3],
)
if length == 10 {
return dst, nil
}
if len(src) == 4 {
return append(dst, zeroDateTime[10:length]...), nil
}
dst = append(dst, ' ')
p1 = src[4] // hour
src = src[5:]
// p1 is 2-digit hour, src is after hour
p2, p3 = src[0], src[1]
dst = append(dst,
digits10[p1], digits01[p1], ':',
digits10[p2], digits01[p2], ':',
digits10[p3], digits01[p3],
)
return appendMicrosecs(dst, src[2:], int(length)-20), nil
}
func formatBinaryTime(src []byte, length uint8) (driver.Value, error) {
// length expects the deterministic length of the zero value,
// negative time and 100+ hours are automatically added if needed
if len(src) == 0 {
return zeroDateTime[11 : 11+length], nil
}
var dst []byte // return value
switch length {
case
8, // time (can be up to 10 when negative and 100+ hours)
10, 11, 12, 13, 14, 15: // time with fractional seconds
default:
return nil, fmt.Errorf("illegal TIME length %d", length)
}
switch len(src) {
case 8, 12:
default:
return nil, fmt.Errorf("invalid TIME packet length %d", len(src))
}
// +2 to enable negative time and 100+ hours
dst = make([]byte, 0, length+2)
if src[0] == 1 {
dst = append(dst, '-')
}
days := binary.LittleEndian.Uint32(src[1:5])
hours := int64(days)*24 + int64(src[5])
if hours >= 100 {
dst = strconv.AppendInt(dst, hours, 10)
} else {
dst = append(dst, digits10[hours], digits01[hours])
}
min, sec := src[6], src[7]
dst = append(dst, ':',
digits10[min], digits01[min], ':',
digits10[sec], digits01[sec],
)
return appendMicrosecs(dst, src[8:], int(length)-9), nil
}
/******************************************************************************
* Convert from and to bytes *
******************************************************************************/
func uint64ToBytes(n uint64) []byte {
return []byte{
byte(n),
byte(n >> 8),
byte(n >> 16),
byte(n >> 24),
byte(n >> 32),
byte(n >> 40),
byte(n >> 48),
byte(n >> 56),
}
}
func uint64ToString(n uint64) []byte {
var a [20]byte
i := 20
// U+0030 = 0
// ...
// U+0039 = 9
var q uint64
for n >= 10 {
i--
q = n / 10
a[i] = uint8(n-q*10) + 0x30
n = q
}
i--
a[i] = uint8(n) + 0x30
return a[i:]
}
// treats string value as unsigned integer representation
func stringToInt(b []byte) int {
val := 0
for i := range b {
val *= 10
val += int(b[i] - 0x30)
}
return val
}
// returns the string read as a bytes slice, wheter the value is NULL,
// the number of bytes read and an error, in case the string is longer than
// the input slice
func readLengthEncodedString(b []byte) ([]byte, bool, int, error) {
// Get length
num, isNull, n := readLengthEncodedInteger(b)
if num < 1 {
return b[n:n], isNull, n, nil
}
n += int(num)
// Check data length
if len(b) >= n {
return b[n-int(num) : n : n], false, n, nil
}
return nil, false, n, io.EOF
}
// returns the number of bytes skipped and an error, in case the string is
// longer than the input slice
func skipLengthEncodedString(b []byte) (int, error) {
// Get length
num, _, n := readLengthEncodedInteger(b)
if num < 1 {
return n, nil
}
n += int(num)
// Check data length
if len(b) >= n {
return n, nil
}
return n, io.EOF
}
// returns the number read, whether the value is NULL and the number of bytes read
func readLengthEncodedInteger(b []byte) (uint64, bool, int) {
// See issue #349
if len(b) == 0 {
return 0, true, 1
}
switch b[0] {
// 251: NULL
case 0xfb:
return 0, true, 1
// 252: value of following 2
case 0xfc:
return uint64(b[1]) | uint64(b[2])<<8, false, 3
// 253: value of following 3
case 0xfd:
return uint64(b[1]) | uint64(b[2])<<8 | uint64(b[3])<<16, false, 4
// 254: value of following 8
case 0xfe:
return uint64(b[1]) | uint64(b[2])<<8 | uint64(b[3])<<16 |
uint64(b[4])<<24 | uint64(b[5])<<32 | uint64(b[6])<<40 |
uint64(b[7])<<48 | uint64(b[8])<<56,
false, 9
}
// 0-250: value of first byte
return uint64(b[0]), false, 1
}
// encodes a uint64 value and appends it to the given bytes slice
func appendLengthEncodedInteger(b []byte, n uint64) []byte {
switch {
case n <= 250:
return append(b, byte(n))
case n <= 0xffff:
return append(b, 0xfc, byte(n), byte(n>>8))
case n <= 0xffffff:
return append(b, 0xfd, byte(n), byte(n>>8), byte(n>>16))
}
return append(b, 0xfe, byte(n), byte(n>>8), byte(n>>16), byte(n>>24),
byte(n>>32), byte(n>>40), byte(n>>48), byte(n>>56))
}
// reserveBuffer checks cap(buf) and expand buffer to len(buf) + appendSize.
// If cap(buf) is not enough, reallocate new buffer.
func reserveBuffer(buf []byte, appendSize int) []byte {
newSize := len(buf) + appendSize
if cap(buf) < newSize {
// Grow buffer exponentially
newBuf := make([]byte, len(buf)*2+appendSize)
copy(newBuf, buf)
buf = newBuf
}
return buf[:newSize]
}
// escapeBytesBackslash escapes []byte with backslashes (\)
// This escapes the contents of a string (provided as []byte) by adding backslashes before special
// characters, and turning others into specific escape sequences, such as
// turning newlines into \n and null bytes into \0.
// https://github.com/mysql/mysql-server/blob/mysql-5.7.5/mysys/charset.c#L823-L932
func escapeBytesBackslash(buf, v []byte) []byte {
pos := len(buf)
buf = reserveBuffer(buf, len(v)*2)
for _, c := range v {
switch c {
case '\x00':
buf[pos] = '\\'
buf[pos+1] = '0'
pos += 2
case '\n':
buf[pos] = '\\'
buf[pos+1] = 'n'
pos += 2
case '\r':
buf[pos] = '\\'
buf[pos+1] = 'r'
pos += 2
case '\x1a':
buf[pos] = '\\'
buf[pos+1] = 'Z'
pos += 2
case '\'':
buf[pos] = '\\'
buf[pos+1] = '\''
pos += 2
case '"':
buf[pos] = '\\'
buf[pos+1] = '"'
pos += 2
case '\\':
buf[pos] = '\\'
buf[pos+1] = '\\'
pos += 2
default:
buf[pos] = c
pos++
}
}
return buf[:pos]
}
// escapeStringBackslash is similar to escapeBytesBackslash but for string.
func escapeStringBackslash(buf []byte, v string) []byte {
pos := len(buf)
buf = reserveBuffer(buf, len(v)*2)
for i := 0; i < len(v); i++ {
c := v[i]
switch c {
case '\x00':
buf[pos] = '\\'
buf[pos+1] = '0'
pos += 2
case '\n':
buf[pos] = '\\'
buf[pos+1] = 'n'
pos += 2
case '\r':
buf[pos] = '\\'
buf[pos+1] = 'r'
pos += 2
case '\x1a':
buf[pos] = '\\'
buf[pos+1] = 'Z'
pos += 2
case '\'':
buf[pos] = '\\'
buf[pos+1] = '\''
pos += 2
case '"':
buf[pos] = '\\'
buf[pos+1] = '"'
pos += 2
case '\\':
buf[pos] = '\\'
buf[pos+1] = '\\'
pos += 2
default:
buf[pos] = c
pos++
}
}
return buf[:pos]
}
// escapeBytesQuotes escapes apostrophes in []byte by doubling them up.
// This escapes the contents of a string by doubling up any apostrophes that
// it contains. This is used when the NO_BACKSLASH_ESCAPES SQL_MODE is in
// effect on the server.
// https://github.com/mysql/mysql-server/blob/mysql-5.7.5/mysys/charset.c#L963-L1038
func escapeBytesQuotes(buf, v []byte) []byte {
pos := len(buf)
buf = reserveBuffer(buf, len(v)*2)
for _, c := range v {
if c == '\'' {
buf[pos] = '\''
buf[pos+1] = '\''
pos += 2
} else {
buf[pos] = c
pos++
}
}
return buf[:pos]
}
// escapeStringQuotes is similar to escapeBytesQuotes but for string.
func escapeStringQuotes(buf []byte, v string) []byte {
pos := len(buf)
buf = reserveBuffer(buf, len(v)*2)
for i := 0; i < len(v); i++ {
c := v[i]
if c == '\'' {
buf[pos] = '\''
buf[pos+1] = '\''
pos += 2
} else {
buf[pos] = c
pos++
}
}
return buf[:pos]
}
/******************************************************************************
* Sync utils *
******************************************************************************/
// noCopy may be embedded into structs which must not be copied
// after the first use.
//
// See https://github.com/golang/go/issues/8005#issuecomment-190753527
// for details.
type noCopy struct{}
// Lock is a no-op used by -copylocks checker from `go vet`.
func (*noCopy) Lock() {}
// atomicBool is a wrapper around uint32 for usage as a boolean value with
// atomic access.
type atomicBool struct {
_noCopy noCopy
value uint32
}
// IsSet returns whether the current boolean value is true
func (ab *atomicBool) IsSet() bool {
return atomic.LoadUint32(&ab.value) > 0
}
// Set sets the value of the bool regardless of the previous value
func (ab *atomicBool) Set(value bool) {
if value {
atomic.StoreUint32(&ab.value, 1)
} else {
atomic.StoreUint32(&ab.value, 0)
}
}
// TrySet sets the value of the bool and returns whether the value changed
func (ab *atomicBool) TrySet(value bool) bool {
if value {
return atomic.SwapUint32(&ab.value, 1) == 0
}
return atomic.SwapUint32(&ab.value, 0) > 0
}
// atomicError is a wrapper for atomically accessed error values
type atomicError struct {
_noCopy noCopy
value atomic.Value
}
// Set sets the error value regardless of the previous value.
// The value must not be nil
func (ae *atomicError) Set(value error) {
ae.value.Store(value)
}
// Value returns the current error value
func (ae *atomicError) Value() error {
if v := ae.value.Load(); v != nil {
// this will panic if the value doesn't implement the error interface
return v.(error)
}
return nil
}
func namedValueToValue(named []driver.NamedValue) ([]driver.Value, error) {
dargs := make([]driver.Value, len(named))
for n, param := range named {
if len(param.Name) > 0 {
// TODO: support the use of Named Parameters #561
return nil, errors.New("mysql: driver does not support the use of Named Parameters")
}
dargs[n] = param.Value
}
return dargs, nil
}
func mapIsolationLevel(level driver.IsolationLevel) (string, error) {
switch sql.IsolationLevel(level) {
case sql.LevelRepeatableRead:
return "REPEATABLE READ", nil
case sql.LevelReadCommitted:
return "READ COMMITTED", nil
case sql.LevelReadUncommitted:
return "READ UNCOMMITTED", nil
case sql.LevelSerializable:
return "SERIALIZABLE", nil
default:
return "", fmt.Errorf("mysql: unsupported isolation level: %v", level)
}
}

12
vendor/github.com/golang-migrate/migrate/v4/.dockerignore generated vendored Normal file
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@ -0,0 +1,12 @@
# Project
FAQ.md
README.md
LICENSE
.gitignore
.travis.yml
CONTRIBUTING.md
MIGRATIONS.md
docker-deploy.sh
# Golang
testing

10
vendor/github.com/golang-migrate/migrate/v4/.gitignore generated vendored Normal file
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@ -0,0 +1,10 @@
.DS_Store
cli/build
cli/cli
cli/migrate
.coverage
.godoc.pid
vendor/
.vscode/
.idea
dist/

26
vendor/github.com/golang-migrate/migrate/v4/.golangci.yml generated vendored Normal file
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@ -0,0 +1,26 @@
run:
# timeout for analysis, e.g. 30s, 5m, default is 1m
timeout: 5m
linters:
enable:
#- golint
- interfacer
- unconvert
#- dupl
- goconst
- gofmt
- misspell
- unparam
- nakedret
- prealloc
#- gosec
linters-settings:
misspell:
locale: US
issues:
max-same-issues: 0
max-issues-per-linter: 0
exclude-use-default: false
exclude:
# gosec: Duplicated errcheck checks
- G104

102
vendor/github.com/golang-migrate/migrate/v4/.goreleaser.yml generated vendored Normal file
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@ -0,0 +1,102 @@
project_name: migrate
before:
hooks:
- go mod tidy
builds:
- env:
- CGO_ENABLED=0
goos:
- linux
- windows
- darwin
goarch:
- amd64
- arm
- arm64
- 386
goarm:
- 7
main: ./cmd/migrate
ldflags:
- '-w -s -X main.Version={{ .Version }} -extldflags "static"'
flags:
- "-tags={{ .Env.DATABASE }} {{ .Env.SOURCE }}"
- "-trimpath"
nfpms:
- homepage: "https://github.com/golang-migrate/migrate"
maintainer: "dhui@users.noreply.github.com"
license: MIT
description: "Database migrations"
formats:
- deb
file_name_template: "{{ .ProjectName }}.{{ .Os }}-{{ .Arch }}{{ if .Arm }}v{{ .Arm }}{{ end }}"
dockers:
- goos: linux
goarch: amd64
dockerfile: Dockerfile.github-actions
use: buildx
ids:
- migrate
image_templates:
- 'migrate/migrate:{{ .Tag }}-amd64'
build_flag_templates:
- '--label=org.opencontainers.image.created={{ .Date }}'
- '--label=org.opencontainers.image.title={{ .ProjectName }}'
- '--label=org.opencontainers.image.revision={{ .FullCommit }}'
- '--label=org.opencontainers.image.version={{ .Version }}'
- "--label=org.opencontainers.image.source={{ .GitURL }}"
- "--platform=linux/amd64"
- goos: linux
goarch: arm64
dockerfile: Dockerfile.github-actions
use: buildx
ids:
- migrate
image_templates:
- 'migrate/migrate:{{ .Tag }}-arm64'
build_flag_templates:
- '--label=org.opencontainers.image.created={{ .Date }}'
- '--label=org.opencontainers.image.title={{ .ProjectName }}'
- '--label=org.opencontainers.image.revision={{ .FullCommit }}'
- '--label=org.opencontainers.image.version={{ .Version }}'
- "--label=org.opencontainers.image.source={{ .GitURL }}"
- "--platform=linux/arm64"
docker_manifests:
- name_template: 'migrate/migrate:{{ .Tag }}'
image_templates:
- 'migrate/migrate:{{ .Tag }}-amd64'
- 'migrate/migrate:{{ .Tag }}-arm64'
- name_template: 'migrate/migrate:{{ .Major }}'
image_templates:
- 'migrate/migrate:{{ .Tag }}-amd64'
- 'migrate/migrate:{{ .Tag }}-arm64'
- name_template: 'migrate/migrate:latest'
image_templates:
- 'migrate/migrate:{{ .Tag }}-amd64'
- 'migrate/migrate:{{ .Tag }}-arm64'
archives:
- name_template: "{{ .ProjectName }}.{{ .Os }}-{{ .Arch }}{{ if .Arm }}v{{ .Arm }}{{ end }}"
format_overrides:
- goos: windows
format: zip
checksum:
name_template: 'sha256sum.txt'
release:
draft: true
prerelease: auto
source:
enabled: true
format: zip
changelog:
skip: false
sort: asc
filters:
exclude:
- '^docs:'
- '^test:'
- Merge pull request
- Merge branch
- go mod tidy
snapshot:
name_template: "{{ .Tag }}-next"

138
vendor/github.com/golang-migrate/migrate/v4/.travis.yml generated vendored Normal file
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language: go
sudo: required
matrix:
allow_failures:
- go: master
include:
# Supported versions of Go: https://golang.org/dl/
- go: "1.14.x"
- go: "1.15.x"
- go: master
go_import_path: github.com/golang-migrate/migrate
env:
global:
- GO111MODULE=on
- MIGRATE_TEST_CONTAINER_BOOT_TIMEOUT=60
- DOCKER_USERNAME=golangmigrate
- secure: "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"
services:
- docker
cache:
directories:
- $GOPATH/pkg
before_install:
# Update docker to latest version: https://docs.travis-ci.com/user/docker/#installing-a-newer-docker-version
- curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
- sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
- sudo apt-get update
- sudo apt-get -y -o Dpkg::Options::="--force-confnew" install docker-ce
# Install golangci-lint
- curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.30.0
- echo "TRAVIS_GO_VERSION=${TRAVIS_GO_VERSION}"
install:
- go get github.com/mattn/goveralls
script:
- golangci-lint run
- make test COVERAGE_DIR=/tmp/coverage
after_success:
- goveralls -service=travis-ci -coverprofile /tmp/coverage/combined.txt
- make list-external-deps > dependency_tree.txt && cat dependency_tree.txt
- make build-cli
- gem install --no-document fpm
- fpm -s dir -t deb -n migrate -v "$(git describe --tags 2>/dev/null | cut -c 2-)" --license MIT -m dhui@users.noreply.github.com --url https://github.com/golang-migrate/migrate --description='Database migrations' -a amd64 -p migrate.$(git describe --tags 2>/dev/null | cut -c 2-).deb --deb-no-default-config-files -f -C cli/build migrate.linux-amd64=/usr/local/bin/migrate
deploy:
- provider: releases
api_key:
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dist: ubuntu/bionic
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dist: ubuntu/focal
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dist: debian/stretch
package_glob: '*.deb'
skip_cleanup: true
on:
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repo: golang-migrate/migrate
tags: true
- provider: packagecloud
repository: migrate
username: golang-migrate
token:
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dist: debian/buster
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skip_cleanup: true
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repo: golang-migrate/migrate
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- provider: script
script: ./docker-deploy.sh
skip_cleanup: true
on:
go: "1.15.x"
repo: golang-migrate/migrate
tags: true

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# Development, Testing and Contributing
1. Make sure you have a running Docker daemon
(Install for [MacOS](https://docs.docker.com/docker-for-mac/))
1. Use a version of Go that supports [modules](https://golang.org/cmd/go/#hdr-Modules__module_versions__and_more) (e.g. Go 1.11+)
1. Fork this repo and `git clone` somewhere to `$GOPATH/src/github.com/golang-migrate/migrate`
* Ensure that [Go modules are enabled](https://golang.org/cmd/go/#hdr-Preliminary_module_support) (e.g. your repo path or the `GO111MODULE` environment variable are set correctly)
1. Install [golangci-lint](https://github.com/golangci/golangci-lint#install)
1. Run the linter: `golangci-lint run`
1. Confirm tests are working: `make test-short`
1. Write awesome code ...
1. `make test` to run all tests against all database versions
1. Push code and open Pull Request
Some more helpful commands:
* You can specify which database/ source tests to run:
`make test-short SOURCE='file go_bindata' DATABASE='postgres cassandra'`
* After `make test`, run `make html-coverage` which opens a shiny test coverage overview.
* `make build-cli` builds the CLI in directory `cli/build/`.
* `make list-external-deps` lists all external dependencies for each package
* `make docs && make open-docs` opens godoc in your browser, `make kill-docs` kills the godoc server.
Repeatedly call `make docs` to refresh the server.
* Set the `DOCKER_API_VERSION` environment variable to the latest supported version if you get errors regarding the docker client API version being too new.

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FROM golang:1.16-alpine3.13 AS builder
ARG VERSION
RUN apk add --no-cache git gcc musl-dev make
WORKDIR /go/src/github.com/golang-migrate/migrate
ENV GO111MODULE=on
COPY go.mod go.sum ./
RUN go mod download
COPY . ./
RUN make build-docker
FROM alpine:3.13
RUN apk add --no-cache ca-certificates
COPY --from=builder /go/src/github.com/golang-migrate/migrate/build/migrate.linux-386 /usr/local/bin/migrate
RUN ln -s /usr/local/bin/migrate /migrate
ENTRYPOINT ["migrate"]
CMD ["--help"]

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ARG DOCKER_IMAGE
FROM $DOCKER_IMAGE
RUN apk add --no-cache git gcc musl-dev make
WORKDIR /go/src/github.com/golang-migrate/migrate
ENV GO111MODULE=on
ENV COVERAGE_DIR=/tmp/coverage
COPY go.mod go.sum ./
RUN go mod download
COPY . ./
CMD ["make", "test"]

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FROM alpine:3.13
RUN apk add --no-cache ca-certificates
COPY migrate /usr/local/bin/migrate
RUN ln -s /usr/local/bin/migrate /usr/bin/migrate
RUN ln -s /usr/local/bin/migrate /migrate
ENTRYPOINT ["migrate"]
CMD ["--help"]

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# FAQ
#### How is the code base structured?
```
/ package migrate (the heart of everything)
/cli the CLI wrapper
/database database driver and sub directories have the actual driver implementations
/source source driver and sub directories have the actual driver implementations
```
#### Why is there no `source/driver.go:Last()`?
It's not needed. And unless the source has a "native" way to read a directory in reversed order,
it might be expensive to do a full directory scan in order to get the last element.
#### What is a NilMigration? NilVersion?
NilMigration defines a migration without a body. NilVersion is defined as const -1.
#### What is the difference between uint(version) and int(targetVersion)?
version refers to an existing migration version coming from a source and therefore can never be negative.
targetVersion can either be a version OR represent a NilVersion, which equals -1.
#### What's the difference between Next/Previous and Up/Down?
```
1_first_migration.up.extension next -> 2_second_migration.up.extension ...
1_first_migration.down.extension <- previous 2_second_migration.down.extension ...
```
#### Why two separate files (up and down) for a migration?
It makes all of our lives easier. No new markup/syntax to learn for users
and existing database utility tools continue to work as expected.
#### How many migrations can migrate handle?
Whatever the maximum positive signed integer value is for your platform.
For 32bit it would be 2,147,483,647 migrations. Migrate only keeps references to
the currently run and pre-fetched migrations in memory. Please note that some
source drivers need to do build a full "directory" tree first, which puts some
heat on the memory consumption.
#### Are the table tests in migrate_test.go bloated?
Yes and no. There are duplicate test cases for sure but they don't hurt here. In fact
the tests are very visual now and might help new users understand expected behaviors quickly.
Migrate from version x to y and y is the last migration? Just check out the test for
that particular case and know what's going on instantly.
#### What is Docker being used for?
Only for testing. See [testing/docker.go](testing/docker.go)
#### Why not just use docker-compose?
It doesn't give us enough runtime control for testing. We want to be able to bring up containers fast
and whenever we want, not just once at the beginning of all tests.
#### Can I maintain my driver in my own repository?
Yes, technically thats possible. We want to encourage you to contribute your driver to this respository though.
The driver's functionality is dictated by migrate's interfaces. That means there should really
just be one driver for a database/ source. We want to prevent a future where several drivers doing the exact same thing,
just implemented a bit differently, co-exist somewhere on GitHub. If users have to do research first to find the
"best" available driver for a database in order to get started, we would have failed as an open source community.
#### Can I mix multiple sources during a batch of migrations?
No.
#### What does "dirty" database mean?
Before a migration runs, each database sets a dirty flag. Execution stops if a migration fails and the dirty state persists,
which prevents attempts to run more migrations on top of a failed migration. You need to manually fix the error
and then "force" the expected version.
#### What happens if two programs try and update the database at the same time?
Database-specific locking features are used by *some* database drivers to prevent multiple instances of migrate from running migrations at the same time
the same database at the same time. For example, the MySQL driver uses the `GET_LOCK` function, while the Postgres driver uses
the `pg_advisory_lock` function.
#### Do I need to create a table for tracking migration version used?
No, it is done automatically.
#### Can I use migrate with a non-Go project?
Yes, you can use the migrate CLI in a non-Go project, but there are probably other libraries/frameworks available that offer better test and deploy integrations in that language/framework.
#### I have got an error `Dirty database version 1. Fix and force version`. What should I do?
Keep calm and refer to [the getting started docs](GETTING_STARTED.md#forcing-your-database-version).

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# Getting started
Before you start, you should understand the concept of forward/up and reverse/down database migrations.
Configure a database for your application. Make sure that your database driver is supported [here](README.md#databases)
## Create migrations
Create some migrations using migrate CLI. Here is an example:
```
migrate create -ext sql -dir db/migrations -seq create_users_table
```
Once you create your files, you should fill them.
**IMPORTANT:** In a project developed by more than one person there is a chance of migrations inconsistency - e.g. two developers can create conflicting migrations, and the developer that created his migration later gets it merged to the repository first.
Developers and Teams should keep an eye on such cases (especially during code review).
[Here](https://github.com/golang-migrate/migrate/issues/179#issuecomment-475821264) is the issue summary if you would like to read more.
Consider making your migrations idempotent - we can run the same sql code twice in a row with the same result. This makes our migrations more robust. On the other hand, it causes slightly less control over database schema - e.g. let's say you forgot to drop the table in down migration. You run down migration - the table is still there. When you run up migration again - `CREATE TABLE` would return an error, helping you find an issue in down migration, while `CREATE TABLE IF NOT EXISTS` would not. Use those conditions wisely.
In case you would like to run several commands/queries in one migration, you should wrap them in a transaction (if your database supports it).
This way if one of commands fails, our database will remain unchanged.
## Run migrations
Run your migrations through the CLI or your app and check if they applied expected changes.
Just to give you an idea:
```
migrate -database YOUR_DATABASE_URL -path PATH_TO_YOUR_MIGRATIONS up
```
Just add the code to your app and you're ready to go!
Before commiting your migrations you should run your migrations up, down, and then up again to see if migrations are working properly both ways.
(e.g. if you created a table in a migration but reverse migration did not delete it, you will encounter an error when running the forward migration again)
It's also worth checking your migrations in a separate, containerized environment. You can find some tools in the end of this document.
**IMPORTANT:** If you would like to run multiple instances of your app on different machines be sure to use a database that supports locking when running migrations. Otherwise you may encounter issues.
## Forcing your database version
In case you run a migration that contained an error, migrate will not let you run other migrations on the same database. You will see an error like `Dirty database version 1. Fix and force version`, even when you fix the erred migration. This means your database was marked as 'dirty'.
You need to investigate the migration error - was your migration applied partially, or was it not applied at all? Once you know, you should force your database to a version reflecting it's real state. You can do so with `force` command:
```
migrate -path PATH_TO_YOUR_MIGRATIONS -database YOUR_DATABASE_URL force VERSION
```
Once you force the version and your migration was fixed, your database is 'clean' again and you can proceed with your migrations.
For details and example of usage see [this comment](https://github.com/golang-migrate/migrate/issues/282#issuecomment-530743258).
## Further reading:
- [PostgreSQL tutorial](database/postgres/TUTORIAL.md)
- [Best practices](MIGRATIONS.md)
- [FAQ](FAQ.md)
- Tools for testing your migrations in a container:
- https://github.com/dhui/dktest
- https://github.com/ory/dockertest

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The MIT License (MIT)
Original Work
Copyright (c) 2016 Matthias Kadenbach
https://github.com/mattes/migrate
Modified Work
Copyright (c) 2018 Dale Hui
https://github.com/golang-migrate/migrate
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# Migrations
## Migration Filename Format
A single logical migration is represented as two separate migration files, one
to migrate "up" to the specified version from the previous version, and a second
to migrate back "down" to the previous version. These migrations can be provided
by any one of the supported [migration sources](./README.md#migration-sources).
The ordering and direction of the migration files is determined by the filenames
used for them. `migrate` expects the filenames of migrations to have the format:
{version}_{title}.up.{extension}
{version}_{title}.down.{extension}
The `title` of each migration is unused, and is only for readability. Similarly,
the `extension` of the migration files is not checked by the library, and should
be an appropriate format for the database in use (`.sql` for SQL variants, for
instance).
Versions of migrations may be represented as any 64 bit unsigned integer.
All migrations are applied upward in order of increasing version number, and
downward by decreasing version number.
Common versioning schemes include incrementing integers:
1_initialize_schema.down.sql
1_initialize_schema.up.sql
2_add_table.down.sql
2_add_table.up.sql
...
Or timestamps at an appropriate resolution:
1500360784_initialize_schema.down.sql
1500360784_initialize_schema.up.sql
1500445949_add_table.down.sql
1500445949_add_table.up.sql
...
But any scheme resulting in distinct, incrementing integers as versions is valid.
It is suggested that the version number of corresponding `up` and `down` migration
files be equivalent for clarity, but they are allowed to differ so long as the
relative ordering of the migrations is preserved.
The migration files are permitted to be "empty", in the event that a migration
is a no-op or is irreversible. It is recommended to still include both migration
files by making the whole migration file consist of a comment.
If your database does not support comments, then deleting the migration file will also work.
Note, an actual empty file (e.g. a 0 byte file) may cause issues with your database since migrate
will attempt to run an empty query. In this case, deleting the migration file will also work.
For the rational of this behavior see:
[#244 (comment)](https://github.com/golang-migrate/migrate/issues/244#issuecomment-510758270)
## Migration Content Format
The format of the migration files themselves varies between database systems.
Different databases have different semantics around schema changes and when and
how they are allowed to occur
(for instance, [if schema changes can occur within a transaction](https://wiki.postgresql.org/wiki/Transactional_DDL_in_PostgreSQL:_A_Competitive_Analysis)).
As such, the `migrate` library has little to no checking around the format of
migration sources. The migration files are generally processed directly by the
drivers as raw operations.
## Reversibility of Migrations
Best practice for writing schema migration is that all migrations should be
reversible. It should in theory be possible for run migrations down and back up
through any and all versions with the state being fully cleaned and recreated
by doing so.
By adhering to this recommended practice, development and deployment of new code
is cleaner and easier (cleaning database state for a new feature should be as
easy as migrating down to a prior version, and back up to the latest).
As opposed to some other migration libraries, `migrate` represents up and down
migrations as separate files. This prevents any non-standard file syntax from
being introduced which may result in unintended behavior or errors, depending
on what database is processing the file.
While it is technically possible for an up or down migration to exist on its own
without an equivalently versioned counterpart, it is strongly recommended to
always include a down migration which cleans up the state of the corresponding
up migration.

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SOURCE ?= file go_bindata github github_ee bitbucket aws_s3 google_cloud_storage godoc_vfs gitlab
DATABASE ?= postgres mysql redshift cassandra spanner cockroachdb clickhouse mongodb sqlserver firebird neo4j pgx
DATABASE_TEST ?= $(DATABASE) sqlite sqlite3 sqlcipher
VERSION ?= $(shell git describe --tags 2>/dev/null | cut -c 2-)
TEST_FLAGS ?=
REPO_OWNER ?= $(shell cd .. && basename "$$(pwd)")
COVERAGE_DIR ?= .coverage
build:
CGO_ENABLED=0 go build -ldflags='-X main.Version=$(VERSION)' -tags '$(DATABASE) $(SOURCE)' ./cmd/migrate
build-docker:
CGO_ENABLED=0 go build -a -o build/migrate.linux-386 -ldflags="-s -w -X main.Version=${VERSION}" -tags "$(DATABASE) $(SOURCE)" ./cmd/migrate
build-cli: clean
-mkdir ./cli/build
cd ./cmd/migrate && CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o ../../cli/build/migrate.linux-amd64 -ldflags='-X main.Version=$(VERSION) -extldflags "-static"' -tags '$(DATABASE) $(SOURCE)' .
cd ./cmd/migrate && CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build -a -o ../../cli/build/migrate.linux-armv7 -ldflags='-X main.Version=$(VERSION) -extldflags "-static"' -tags '$(DATABASE) $(SOURCE)' .
cd ./cmd/migrate && CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -a -o ../../cli/build/migrate.linux-arm64 -ldflags='-X main.Version=$(VERSION) -extldflags "-static"' -tags '$(DATABASE) $(SOURCE)' .
cd ./cmd/migrate && CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 go build -a -o ../../cli/build/migrate.darwin-amd64 -ldflags='-X main.Version=$(VERSION) -extldflags "-static"' -tags '$(DATABASE) $(SOURCE)' .
cd ./cmd/migrate && CGO_ENABLED=0 GOOS=windows GOARCH=386 go build -a -o ../../cli/build/migrate.windows-386.exe -ldflags='-X main.Version=$(VERSION) -extldflags "-static"' -tags '$(DATABASE) $(SOURCE)' .
cd ./cmd/migrate && CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build -a -o ../../cli/build/migrate.windows-amd64.exe -ldflags='-X main.Version=$(VERSION) -extldflags "-static"' -tags '$(DATABASE) $(SOURCE)' .
cd ./cli/build && find . -name 'migrate*' | xargs -I{} tar czf {}.tar.gz {}
cd ./cli/build && shasum -a 256 * > sha256sum.txt
cat ./cli/build/sha256sum.txt
clean:
-rm -r ./cli/build
test-short:
make test-with-flags --ignore-errors TEST_FLAGS='-short'
test:
@-rm -r $(COVERAGE_DIR)
@mkdir $(COVERAGE_DIR)
make test-with-flags TEST_FLAGS='-v -race -covermode atomic -coverprofile $$(COVERAGE_DIR)/combined.txt -bench=. -benchmem -timeout 20m'
test-with-flags:
@echo SOURCE: $(SOURCE)
@echo DATABASE_TEST: $(DATABASE_TEST)
@go test $(TEST_FLAGS) ./...
kill-orphaned-docker-containers:
docker rm -f $(shell docker ps -aq --filter label=migrate_test)
html-coverage:
go tool cover -html=$(COVERAGE_DIR)/combined.txt
list-external-deps:
$(call external_deps,'.')
$(call external_deps,'./cli/...')
$(call external_deps,'./testing/...')
$(foreach v, $(SOURCE), $(call external_deps,'./source/$(v)/...'))
$(call external_deps,'./source/testing/...')
$(call external_deps,'./source/stub/...')
$(foreach v, $(DATABASE), $(call external_deps,'./database/$(v)/...'))
$(call external_deps,'./database/testing/...')
$(call external_deps,'./database/stub/...')
restore-import-paths:
find . -name '*.go' -type f -execdir sed -i '' s%\"github.com/$(REPO_OWNER)/migrate%\"github.com/mattes/migrate%g '{}' \;
rewrite-import-paths:
find . -name '*.go' -type f -execdir sed -i '' s%\"github.com/mattes/migrate%\"github.com/$(REPO_OWNER)/migrate%g '{}' \;
# example: fswatch -0 --exclude .godoc.pid --event Updated . | xargs -0 -n1 -I{} make docs
docs:
-make kill-docs
nohup godoc -play -http=127.0.0.1:6064 </dev/null >/dev/null 2>&1 & echo $$! > .godoc.pid
cat .godoc.pid
kill-docs:
@cat .godoc.pid
kill -9 $$(cat .godoc.pid)
rm .godoc.pid
open-docs:
open http://localhost:6064/pkg/github.com/$(REPO_OWNER)/migrate
# example: make release V=0.0.0
release:
git tag v$(V)
@read -p "Press enter to confirm and push to origin ..." && git push origin v$(V)
echo-source:
@echo "$(SOURCE)"
echo-database:
@echo "$(DATABASE)"
define external_deps
@echo '-- $(1)'; go list -f '{{join .Deps "\n"}}' $(1) | grep -v github.com/$(REPO_OWNER)/migrate | xargs go list -f '{{if not .Standard}}{{.ImportPath}}{{end}}'
endef
.PHONY: build build-docker build-cli clean test-short test test-with-flags html-coverage \
restore-import-paths rewrite-import-paths list-external-deps release \
docs kill-docs open-docs kill-orphaned-docker-containers echo-source echo-database
SHELL = /bin/sh
RAND = $(shell echo $$RANDOM)

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[![GitHub Workflow Status (branch)](https://img.shields.io/github/workflow/status/golang-migrate/migrate/CI/master)](https://github.com/golang-migrate/migrate/actions/workflows/ci.yaml?query=branch%3Amaster)
[![GoDoc](https://pkg.go.dev/badge/github.com/golang-migrate/migrate)](https://pkg.go.dev/github.com/golang-migrate/migrate/v4)
[![Coverage Status](https://img.shields.io/coveralls/github/golang-migrate/migrate/master.svg)](https://coveralls.io/github/golang-migrate/migrate?branch=master)
[![packagecloud.io](https://img.shields.io/badge/deb-packagecloud.io-844fec.svg)](https://packagecloud.io/golang-migrate/migrate?filter=debs)
[![Docker Pulls](https://img.shields.io/docker/pulls/migrate/migrate.svg)](https://hub.docker.com/r/migrate/migrate/)
![Supported Go Versions](https://img.shields.io/badge/Go-1.16%2C%201.17-lightgrey.svg)
[![GitHub Release](https://img.shields.io/github/release/golang-migrate/migrate.svg)](https://github.com/golang-migrate/migrate/releases)
[![Go Report Card](https://goreportcard.com/badge/github.com/golang-migrate/migrate)](https://goreportcard.com/report/github.com/golang-migrate/migrate)
# migrate
__Database migrations written in Go. Use as [CLI](#cli-usage) or import as [library](#use-in-your-go-project).__
* Migrate reads migrations from [sources](#migration-sources)
and applies them in correct order to a [database](#databases).
* Drivers are "dumb", migrate glues everything together and makes sure the logic is bulletproof.
(Keeps the drivers lightweight, too.)
* Database drivers don't assume things or try to correct user input. When in doubt, fail.
Forked from [mattes/migrate](https://github.com/mattes/migrate)
## Databases
Database drivers run migrations. [Add a new database?](database/driver.go)
* [PostgreSQL](database/postgres)
* [PGX](database/pgx)
* [Redshift](database/redshift)
* [Ql](database/ql)
* [Cassandra](database/cassandra)
* [SQLite](database/sqlite)
* [SQLite3](database/sqlite3) ([todo #165](https://github.com/mattes/migrate/issues/165))
* [SQLCipher](database/sqlcipher)
* [MySQL/ MariaDB](database/mysql)
* [Neo4j](database/neo4j)
* [MongoDB](database/mongodb)
* [CrateDB](database/crate) ([todo #170](https://github.com/mattes/migrate/issues/170))
* [Shell](database/shell) ([todo #171](https://github.com/mattes/migrate/issues/171))
* [Google Cloud Spanner](database/spanner)
* [CockroachDB](database/cockroachdb)
* [ClickHouse](database/clickhouse)
* [Firebird](database/firebird)
* [MS SQL Server](database/sqlserver)
### Database URLs
Database connection strings are specified via URLs. The URL format is driver dependent but generally has the form: `dbdriver://username:password@host:port/dbname?param1=true&param2=false`
Any [reserved URL characters](https://en.wikipedia.org/wiki/Percent-encoding#Percent-encoding_reserved_characters) need to be escaped. Note, the `%` character also [needs to be escaped](https://en.wikipedia.org/wiki/Percent-encoding#Percent-encoding_the_percent_character)
Explicitly, the following characters need to be escaped:
`!`, `#`, `$`, `%`, `&`, `'`, `(`, `)`, `*`, `+`, `,`, `/`, `:`, `;`, `=`, `?`, `@`, `[`, `]`
It's easiest to always run the URL parts of your DB connection URL (e.g. username, password, etc) through an URL encoder. See the example Python snippets below:
```bash
$ python3 -c 'import urllib.parse; print(urllib.parse.quote(input("String to encode: "), ""))'
String to encode: FAKEpassword!#$%&'()*+,/:;=?@[]
FAKEpassword%21%23%24%25%26%27%28%29%2A%2B%2C%2F%3A%3B%3D%3F%40%5B%5D
$ python2 -c 'import urllib; print urllib.quote(raw_input("String to encode: "), "")'
String to encode: FAKEpassword!#$%&'()*+,/:;=?@[]
FAKEpassword%21%23%24%25%26%27%28%29%2A%2B%2C%2F%3A%3B%3D%3F%40%5B%5D
$
```
## Migration Sources
Source drivers read migrations from local or remote sources. [Add a new source?](source/driver.go)
* [Filesystem](source/file) - read from filesystem
* [Go-Bindata](source/go_bindata) - read from embedded binary data ([jteeuwen/go-bindata](https://github.com/jteeuwen/go-bindata))
* [GitHub](source/github) - read from remote GitHub repositories
* [GitHub Enterprise](source/github_ee) - read from remote GitHub Enterprise repositories
* [Bitbucket](source/bitbucket) - read from remote Bitbucket repositories
* [Gitlab](source/gitlab) - read from remote Gitlab repositories
* [AWS S3](source/aws_s3) - read from Amazon Web Services S3
* [Google Cloud Storage](source/google_cloud_storage) - read from Google Cloud Platform Storage
## CLI usage
* Simple wrapper around this library.
* Handles ctrl+c (SIGINT) gracefully.
* No config search paths, no config files, no magic ENV var injections.
__[CLI Documentation](cmd/migrate)__
### Basic usage
```bash
$ migrate -source file://path/to/migrations -database postgres://localhost:5432/database up 2
```
### Docker usage
```bash
$ docker run -v {{ migration dir }}:/migrations --network host migrate/migrate
-path=/migrations/ -database postgres://localhost:5432/database up 2
```
## Use in your Go project
* API is stable and frozen for this release (v3 & v4).
* Uses [Go modules](https://golang.org/cmd/go/#hdr-Modules__module_versions__and_more) to manage dependencies.
* To help prevent database corruptions, it supports graceful stops via `GracefulStop chan bool`.
* Bring your own logger.
* Uses `io.Reader` streams internally for low memory overhead.
* Thread-safe and no goroutine leaks.
__[Go Documentation](https://godoc.org/github.com/golang-migrate/migrate)__
```go
import (
"github.com/golang-migrate/migrate/v4"
_ "github.com/golang-migrate/migrate/v4/database/postgres"
_ "github.com/golang-migrate/migrate/v4/source/github"
)
func main() {
m, err := migrate.New(
"github://mattes:personal-access-token@mattes/migrate_test",
"postgres://localhost:5432/database?sslmode=enable")
m.Steps(2)
}
```
Want to use an existing database client?
```go
import (
"database/sql"
_ "github.com/lib/pq"
"github.com/golang-migrate/migrate/v4"
"github.com/golang-migrate/migrate/v4/database/postgres"
_ "github.com/golang-migrate/migrate/v4/source/file"
)
func main() {
db, err := sql.Open("postgres", "postgres://localhost:5432/database?sslmode=enable")
driver, err := postgres.WithInstance(db, &postgres.Config{})
m, err := migrate.NewWithDatabaseInstance(
"file:///migrations",
"postgres", driver)
m.Steps(2)
}
```
## Getting started
Go to [getting started](GETTING_STARTED.md)
## Tutorials
* [CockroachDB](database/cockroachdb/TUTORIAL.md)
* [PostgreSQL](database/postgres/TUTORIAL.md)
(more tutorials to come)
## Migration files
Each migration has an up and down migration. [Why?](FAQ.md#why-two-separate-files-up-and-down-for-a-migration)
```bash
1481574547_create_users_table.up.sql
1481574547_create_users_table.down.sql
```
[Best practices: How to write migrations.](MIGRATIONS.md)
## Versions
Version | Supported? | Import | Notes
--------|------------|--------|------
**master** | :white_check_mark: | `import "github.com/golang-migrate/migrate/v4"` | New features and bug fixes arrive here first |
**v4** | :white_check_mark: | `import "github.com/golang-migrate/migrate/v4"` | Used for stable releases |
**v3** | :x: | `import "github.com/golang-migrate/migrate"` (with package manager) or `import "gopkg.in/golang-migrate/migrate.v3"` (not recommended) | **DO NOT USE** - No longer supported |
## Development and Contributing
Yes, please! [`Makefile`](Makefile) is your friend,
read the [development guide](CONTRIBUTING.md).
Also have a look at the [FAQ](FAQ.md).
---
Looking for alternatives? [https://awesome-go.com/#database](https://awesome-go.com/#database).

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// Package database provides the Database interface.
// All database drivers must implement this interface, register themselves,
// optionally provide a `WithInstance` function and pass the tests
// in package database/testing.
package database
import (
"fmt"
"io"
"sync"
iurl "github.com/golang-migrate/migrate/v4/internal/url"
)
var (
ErrLocked = fmt.Errorf("can't acquire lock")
ErrNotLocked = fmt.Errorf("can't unlock, as not currently locked")
)
const NilVersion int = -1
var driversMu sync.RWMutex
var drivers = make(map[string]Driver)
// Driver is the interface every database driver must implement.
//
// How to implement a database driver?
// 1. Implement this interface.
// 2. Optionally, add a function named `WithInstance`.
// This function should accept an existing DB instance and a Config{} struct
// and return a driver instance.
// 3. Add a test that calls database/testing.go:Test()
// 4. Add own tests for Open(), WithInstance() (when provided) and Close().
// All other functions are tested by tests in database/testing.
// Saves you some time and makes sure all database drivers behave the same way.
// 5. Call Register in init().
// 6. Create a internal/cli/build_<driver-name>.go file
// 7. Add driver name in 'DATABASE' variable in Makefile
//
// Guidelines:
// * Don't try to correct user input. Don't assume things.
// When in doubt, return an error and explain the situation to the user.
// * All configuration input must come from the URL string in func Open()
// or the Config{} struct in WithInstance. Don't os.Getenv().
type Driver interface {
// Open returns a new driver instance configured with parameters
// coming from the URL string. Migrate will call this function
// only once per instance.
Open(url string) (Driver, error)
// Close closes the underlying database instance managed by the driver.
// Migrate will call this function only once per instance.
Close() error
// Lock should acquire a database lock so that only one migration process
// can run at a time. Migrate will call this function before Run is called.
// If the implementation can't provide this functionality, return nil.
// Return database.ErrLocked if database is already locked.
Lock() error
// Unlock should release the lock. Migrate will call this function after
// all migrations have been run.
Unlock() error
// Run applies a migration to the database. migration is guaranteed to be not nil.
Run(migration io.Reader) error
// SetVersion saves version and dirty state.
// Migrate will call this function before and after each call to Run.
// version must be >= -1. -1 means NilVersion.
SetVersion(version int, dirty bool) error
// Version returns the currently active version and if the database is dirty.
// When no migration has been applied, it must return version -1.
// Dirty means, a previous migration failed and user interaction is required.
Version() (version int, dirty bool, err error)
// Drop deletes everything in the database.
// Note that this is a breaking action, a new call to Open() is necessary to
// ensure subsequent calls work as expected.
Drop() error
}
// Open returns a new driver instance.
func Open(url string) (Driver, error) {
scheme, err := iurl.SchemeFromURL(url)
if err != nil {
return nil, err
}
driversMu.RLock()
d, ok := drivers[scheme]
driversMu.RUnlock()
if !ok {
return nil, fmt.Errorf("database driver: unknown driver %v (forgotten import?)", scheme)
}
return d.Open(url)
}
// Register globally registers a driver.
func Register(name string, driver Driver) {
driversMu.Lock()
defer driversMu.Unlock()
if driver == nil {
panic("Register driver is nil")
}
if _, dup := drivers[name]; dup {
panic("Register called twice for driver " + name)
}
drivers[name] = driver
}
// List lists the registered drivers
func List() []string {
driversMu.RLock()
defer driversMu.RUnlock()
names := make([]string, 0, len(drivers))
for n := range drivers {
names = append(names, n)
}
return names
}

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package database
import (
"fmt"
)
// Error should be used for errors involving queries ran against the database
type Error struct {
// Optional: the line number
Line uint
// Query is a query excerpt
Query []byte
// Err is a useful/helping error message for humans
Err string
// OrigErr is the underlying error
OrigErr error
}
func (e Error) Error() string {
if len(e.Err) == 0 {
return fmt.Sprintf("%v in line %v: %s", e.OrigErr, e.Line, e.Query)
}
return fmt.Sprintf("%v in line %v: %s (details: %v)", e.Err, e.Line, e.Query, e.OrigErr)
}

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# MySQL
`mysql://user:password@tcp(host:port)/dbname?query`
| URL Query | WithInstance Config | Description |
|------------|---------------------|-------------|
| `x-migrations-table` | `MigrationsTable` | Name of the migrations table |
| `x-no-lock` | `NoLock` | Set to `true` to skip `GET_LOCK`/`RELEASE_LOCK` statements. Useful for [multi-master MySQL flavors](https://www.percona.com/doc/percona-xtradb-cluster/LATEST/features/pxc-strict-mode.html#explicit-table-locking). Only run migrations from one host when this is enabled. |
| `dbname` | `DatabaseName` | The name of the database to connect to |
| `user` | | The user to sign in as |
| `password` | | The user's password |
| `host` | | The host to connect to. |
| `port` | | The port to bind to. |
| `tls` | | TLS / SSL encrypted connection parameter; see [go-sql-driver](https://github.com/go-sql-driver/mysql#tls). Use any name (e.g. `migrate`) if you want to use a custom TLS config (`x-tls-` queries). |
| `x-tls-ca` | | The location of the CA (certificate authority) file. |
| `x-tls-cert` | | The location of the client certicicate file. Must be used with `x-tls-key`. |
| `x-tls-key` | | The location of the private key file. Must be used with `x-tls-cert`. |
| `x-tls-insecure-skip-verify` | | Whether or not to use SSL (true\|false) |
## Use with existing client
If you use the MySQL driver with existing database client, you must create the client with parameter `multiStatements=true`:
```go
package main
import (
"database/sql"
_ "github.com/go-sql-driver/mysql"
"github.com/golang-migrate/migrate"
"github.com/golang-migrate/migrate/database/mysql"
_ "github.com/golang-migrate/migrate/source/file"
)
func main() {
db, _ := sql.Open("mysql", "user:password@tcp(host:port)/dbname?multiStatements=true")
driver, _ := mysql.WithInstance(db, &mysql.Config{})
m, _ := migrate.NewWithDatabaseInstance(
"file:///migrations",
"mysql",
driver,
)
m.Steps(2)
}
```
## Upgrading from v1
1. Write down the current migration version from schema_migrations
1. `DROP TABLE schema_migrations`
2. Wrap your existing migrations in transactions ([BEGIN/COMMIT](https://dev.mysql.com/doc/refman/5.7/en/commit.html)) if you use multiple statements within one migration.
3. Download and install the latest migrate version.
4. Force the current migration version with `migrate force <current_version>`.

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//go:build go1.9
// +build go1.9
package mysql
import (
"context"
"crypto/tls"
"crypto/x509"
"database/sql"
"fmt"
"go.uber.org/atomic"
"io"
"io/ioutil"
nurl "net/url"
"strconv"
"strings"
"github.com/go-sql-driver/mysql"
"github.com/golang-migrate/migrate/v4/database"
"github.com/hashicorp/go-multierror"
)
var _ database.Driver = (*Mysql)(nil) // explicit compile time type check
func init() {
database.Register("mysql", &Mysql{})
}
var DefaultMigrationsTable = "schema_migrations"
var (
ErrDatabaseDirty = fmt.Errorf("database is dirty")
ErrNilConfig = fmt.Errorf("no config")
ErrNoDatabaseName = fmt.Errorf("no database name")
ErrAppendPEM = fmt.Errorf("failed to append PEM")
ErrTLSCertKeyConfig = fmt.Errorf("To use TLS client authentication, both x-tls-cert and x-tls-key must not be empty")
)
type Config struct {
MigrationsTable string
DatabaseName string
NoLock bool
}
type Mysql struct {
// mysql RELEASE_LOCK must be called from the same conn, so
// just do everything over a single conn anyway.
conn *sql.Conn
db *sql.DB
isLocked atomic.Bool
config *Config
}
// connection instance must have `multiStatements` set to true
func WithConnection(ctx context.Context, conn *sql.Conn, config *Config) (*Mysql, error) {
if config == nil {
return nil, ErrNilConfig
}
if err := conn.PingContext(ctx); err != nil {
return nil, err
}
mx := &Mysql{
conn: conn,
db: nil,
config: config,
}
if config.DatabaseName == "" {
query := `SELECT DATABASE()`
var databaseName sql.NullString
if err := conn.QueryRowContext(ctx, query).Scan(&databaseName); err != nil {
return nil, &database.Error{OrigErr: err, Query: []byte(query)}
}
if len(databaseName.String) == 0 {
return nil, ErrNoDatabaseName
}
config.DatabaseName = databaseName.String
}
if len(config.MigrationsTable) == 0 {
config.MigrationsTable = DefaultMigrationsTable
}
if err := mx.ensureVersionTable(); err != nil {
return nil, err
}
return mx, nil
}
// instance must have `multiStatements` set to true
func WithInstance(instance *sql.DB, config *Config) (database.Driver, error) {
ctx := context.Background()
if err := instance.Ping(); err != nil {
return nil, err
}
conn, err := instance.Conn(ctx)
if err != nil {
return nil, err
}
mx, err := WithConnection(ctx, conn, config)
if err != nil {
return nil, err
}
mx.db = instance
return mx, nil
}
// extractCustomQueryParams extracts the custom query params (ones that start with "x-") from
// mysql.Config.Params (connection parameters) as to not interfere with connecting to MySQL
func extractCustomQueryParams(c *mysql.Config) (map[string]string, error) {
if c == nil {
return nil, ErrNilConfig
}
customQueryParams := map[string]string{}
for k, v := range c.Params {
if strings.HasPrefix(k, "x-") {
customQueryParams[k] = v
delete(c.Params, k)
}
}
return customQueryParams, nil
}
func urlToMySQLConfig(url string) (*mysql.Config, error) {
// Need to parse out custom TLS parameters and call
// mysql.RegisterTLSConfig() before mysql.ParseDSN() is called
// which consumes the registered tls.Config
// Fixes: https://github.com/golang-migrate/migrate/issues/411
//
// Can't use url.Parse() since it fails to parse MySQL DSNs
// mysql.ParseDSN() also searches for "?" to find query parameters:
// https://github.com/go-sql-driver/mysql/blob/46351a8/dsn.go#L344
if idx := strings.LastIndex(url, "?"); idx > 0 {
rawParams := url[idx+1:]
parsedParams, err := nurl.ParseQuery(rawParams)
if err != nil {
return nil, err
}
ctls := parsedParams.Get("tls")
if len(ctls) > 0 {
if _, isBool := readBool(ctls); !isBool && strings.ToLower(ctls) != "skip-verify" {
rootCertPool := x509.NewCertPool()
pem, err := ioutil.ReadFile(parsedParams.Get("x-tls-ca"))
if err != nil {
return nil, err
}
if ok := rootCertPool.AppendCertsFromPEM(pem); !ok {
return nil, ErrAppendPEM
}
clientCert := make([]tls.Certificate, 0, 1)
if ccert, ckey := parsedParams.Get("x-tls-cert"), parsedParams.Get("x-tls-key"); ccert != "" || ckey != "" {
if ccert == "" || ckey == "" {
return nil, ErrTLSCertKeyConfig
}
certs, err := tls.LoadX509KeyPair(ccert, ckey)
if err != nil {
return nil, err
}
clientCert = append(clientCert, certs)
}
insecureSkipVerify := false
insecureSkipVerifyStr := parsedParams.Get("x-tls-insecure-skip-verify")
if len(insecureSkipVerifyStr) > 0 {
x, err := strconv.ParseBool(insecureSkipVerifyStr)
if err != nil {
return nil, err
}
insecureSkipVerify = x
}
err = mysql.RegisterTLSConfig(ctls, &tls.Config{
RootCAs: rootCertPool,
Certificates: clientCert,
InsecureSkipVerify: insecureSkipVerify,
})
if err != nil {
return nil, err
}
}
}
}
config, err := mysql.ParseDSN(strings.TrimPrefix(url, "mysql://"))
if err != nil {
return nil, err
}
config.MultiStatements = true
// Keep backwards compatibility from when we used net/url.Parse() to parse the DSN.
// net/url.Parse() would automatically unescape it for us.
// See: https://play.golang.org/p/q9j1io-YICQ
user, err := nurl.QueryUnescape(config.User)
if err != nil {
return nil, err
}
config.User = user
password, err := nurl.QueryUnescape(config.Passwd)
if err != nil {
return nil, err
}
config.Passwd = password
return config, nil
}
func (m *Mysql) Open(url string) (database.Driver, error) {
config, err := urlToMySQLConfig(url)
if err != nil {
return nil, err
}
customParams, err := extractCustomQueryParams(config)
if err != nil {
return nil, err
}
noLockParam, noLock := customParams["x-no-lock"], false
if noLockParam != "" {
noLock, err = strconv.ParseBool(noLockParam)
if err != nil {
return nil, fmt.Errorf("could not parse x-no-lock as bool: %w", err)
}
}
db, err := sql.Open("mysql", config.FormatDSN())
if err != nil {
return nil, err
}
mx, err := WithInstance(db, &Config{
DatabaseName: config.DBName,
MigrationsTable: customParams["x-migrations-table"],
NoLock: noLock,
})
if err != nil {
return nil, err
}
return mx, nil
}
func (m *Mysql) Close() error {
connErr := m.conn.Close()
var dbErr error
if m.db != nil {
dbErr = m.db.Close()
}
if connErr != nil || dbErr != nil {
return fmt.Errorf("conn: %v, db: %v", connErr, dbErr)
}
return nil
}
func (m *Mysql) Lock() error {
return database.CasRestoreOnErr(&m.isLocked, false, true, database.ErrLocked, func() error {
if m.config.NoLock {
return nil
}
aid, err := database.GenerateAdvisoryLockId(
fmt.Sprintf("%s:%s", m.config.DatabaseName, m.config.MigrationsTable))
if err != nil {
return err
}
query := "SELECT GET_LOCK(?, 10)"
var success bool
if err := m.conn.QueryRowContext(context.Background(), query, aid).Scan(&success); err != nil {
return &database.Error{OrigErr: err, Err: "try lock failed", Query: []byte(query)}
}
if !success {
return database.ErrLocked
}
return nil
})
}
func (m *Mysql) Unlock() error {
return database.CasRestoreOnErr(&m.isLocked, true, false, database.ErrNotLocked, func() error {
if m.config.NoLock {
return nil
}
aid, err := database.GenerateAdvisoryLockId(
fmt.Sprintf("%s:%s", m.config.DatabaseName, m.config.MigrationsTable))
if err != nil {
return err
}
query := `SELECT RELEASE_LOCK(?)`
if _, err := m.conn.ExecContext(context.Background(), query, aid); err != nil {
return &database.Error{OrigErr: err, Query: []byte(query)}
}
// NOTE: RELEASE_LOCK could return NULL or (or 0 if the code is changed),
// in which case isLocked should be true until the timeout expires -- synchronizing
// these states is likely not worth trying to do; reconsider the necessity of isLocked.
return nil
})
}
func (m *Mysql) Run(migration io.Reader) error {
migr, err := ioutil.ReadAll(migration)
if err != nil {
return err
}
query := string(migr[:])
if _, err := m.conn.ExecContext(context.Background(), query); err != nil {
return database.Error{OrigErr: err, Err: "migration failed", Query: migr}
}
return nil
}
func (m *Mysql) SetVersion(version int, dirty bool) error {
tx, err := m.conn.BeginTx(context.Background(), &sql.TxOptions{})
if err != nil {
return &database.Error{OrigErr: err, Err: "transaction start failed"}
}
query := "TRUNCATE `" + m.config.MigrationsTable + "`"
if _, err := tx.ExecContext(context.Background(), query); err != nil {
if errRollback := tx.Rollback(); errRollback != nil {
err = multierror.Append(err, errRollback)
}
return &database.Error{OrigErr: err, Query: []byte(query)}
}
// Also re-write the schema version for nil dirty versions to prevent
// empty schema version for failed down migration on the first migration
// See: https://github.com/golang-migrate/migrate/issues/330
if version >= 0 || (version == database.NilVersion && dirty) {
query := "INSERT INTO `" + m.config.MigrationsTable + "` (version, dirty) VALUES (?, ?)"
if _, err := tx.ExecContext(context.Background(), query, version, dirty); err != nil {
if errRollback := tx.Rollback(); errRollback != nil {
err = multierror.Append(err, errRollback)
}
return &database.Error{OrigErr: err, Query: []byte(query)}
}
}
if err := tx.Commit(); err != nil {
return &database.Error{OrigErr: err, Err: "transaction commit failed"}
}
return nil
}
func (m *Mysql) Version() (version int, dirty bool, err error) {
query := "SELECT version, dirty FROM `" + m.config.MigrationsTable + "` LIMIT 1"
err = m.conn.QueryRowContext(context.Background(), query).Scan(&version, &dirty)
switch {
case err == sql.ErrNoRows:
return database.NilVersion, false, nil
case err != nil:
if e, ok := err.(*mysql.MySQLError); ok {
if e.Number == 0 {
return database.NilVersion, false, nil
}
}
return 0, false, &database.Error{OrigErr: err, Query: []byte(query)}
default:
return version, dirty, nil
}
}
func (m *Mysql) Drop() (err error) {
// select all tables
query := `SHOW TABLES LIKE '%'`
tables, err := m.conn.QueryContext(context.Background(), query)
if err != nil {
return &database.Error{OrigErr: err, Query: []byte(query)}
}
defer func() {
if errClose := tables.Close(); errClose != nil {
err = multierror.Append(err, errClose)
}
}()
// delete one table after another
tableNames := make([]string, 0)
for tables.Next() {
var tableName string
if err := tables.Scan(&tableName); err != nil {
return err
}
if len(tableName) > 0 {
tableNames = append(tableNames, tableName)
}
}
if err := tables.Err(); err != nil {
return &database.Error{OrigErr: err, Query: []byte(query)}
}
if len(tableNames) > 0 {
// disable checking foreign key constraints until finished
query = `SET foreign_key_checks = 0`
if _, err := m.conn.ExecContext(context.Background(), query); err != nil {
return &database.Error{OrigErr: err, Query: []byte(query)}
}
defer func() {
// enable foreign key checks
_, _ = m.conn.ExecContext(context.Background(), `SET foreign_key_checks = 1`)
}()
// delete one by one ...
for _, t := range tableNames {
query = "DROP TABLE IF EXISTS `" + t + "`"
if _, err := m.conn.ExecContext(context.Background(), query); err != nil {
return &database.Error{OrigErr: err, Query: []byte(query)}
}
}
}
return nil
}
// ensureVersionTable checks if versions table exists and, if not, creates it.
// Note that this function locks the database, which deviates from the usual
// convention of "caller locks" in the Mysql type.
func (m *Mysql) ensureVersionTable() (err error) {
if err = m.Lock(); err != nil {
return err
}
defer func() {
if e := m.Unlock(); e != nil {
if err == nil {
err = e
} else {
err = multierror.Append(err, e)
}
}
}()
// check if migration table exists
var result string
query := `SHOW TABLES LIKE '` + m.config.MigrationsTable + `'`
if err := m.conn.QueryRowContext(context.Background(), query).Scan(&result); err != nil {
if err != sql.ErrNoRows {
return &database.Error{OrigErr: err, Query: []byte(query)}
}
} else {
return nil
}
// if not, create the empty migration table
query = "CREATE TABLE `" + m.config.MigrationsTable + "` (version bigint not null primary key, dirty boolean not null)"
if _, err := m.conn.ExecContext(context.Background(), query); err != nil {
return &database.Error{OrigErr: err, Query: []byte(query)}
}
return nil
}
// Returns the bool value of the input.
// The 2nd return value indicates if the input was a valid bool value
// See https://github.com/go-sql-driver/mysql/blob/a059889267dc7170331388008528b3b44479bffb/utils.go#L71
func readBool(input string) (value bool, valid bool) {
switch input {
case "1", "true", "TRUE", "True":
return true, true
case "0", "false", "FALSE", "False":
return false, true
}
// Not a valid bool value
return
}

33
vendor/github.com/golang-migrate/migrate/v4/database/util.go generated vendored Normal file
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@ -0,0 +1,33 @@
package database
import (
"fmt"
"go.uber.org/atomic"
"hash/crc32"
"strings"
)
const advisoryLockIDSalt uint = 1486364155
// GenerateAdvisoryLockId inspired by rails migrations, see https://goo.gl/8o9bCT
func GenerateAdvisoryLockId(databaseName string, additionalNames ...string) (string, error) { // nolint: golint
if len(additionalNames) > 0 {
databaseName = strings.Join(append(additionalNames, databaseName), "\x00")
}
sum := crc32.ChecksumIEEE([]byte(databaseName))
sum = sum * uint32(advisoryLockIDSalt)
return fmt.Sprint(sum), nil
}
// CasRestoreOnErr CAS wrapper to automatically restore the lock state on error
func CasRestoreOnErr(lock *atomic.Bool, o, n bool, casErr error, f func() error) error {
if !lock.CAS(o, n) {
return casErr
}
if err := f(); err != nil {
// Automatically unlock/lock on error
lock.Store(o)
return err
}
return nil
}

5
vendor/github.com/golang-migrate/migrate/v4/docker-deploy.sh generated vendored Normal file
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@ -0,0 +1,5 @@
#!/bin/bash
echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin && \
docker build --build-arg VERSION="$TRAVIS_TAG" . -t migrate/migrate -t migrate/migrate:"$TRAVIS_TAG" && \
docker push migrate/migrate:"$TRAVIS_TAG" && docker push migrate/migrate

25
vendor/github.com/golang-migrate/migrate/v4/internal/url/url.go generated vendored Normal file
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@ -0,0 +1,25 @@
package url
import (
"errors"
"strings"
)
var errNoScheme = errors.New("no scheme")
var errEmptyURL = errors.New("URL cannot be empty")
// schemeFromURL returns the scheme from a URL string
func SchemeFromURL(url string) (string, error) {
if url == "" {
return "", errEmptyURL
}
i := strings.Index(url, ":")
// No : or : is the first character.
if i < 1 {
return "", errNoScheme
}
return url[0:i], nil
}

12
vendor/github.com/golang-migrate/migrate/v4/log.go generated vendored Normal file
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@ -0,0 +1,12 @@
package migrate
// Logger is an interface so you can pass in your own
// logging implementation.
type Logger interface {
// Printf is like fmt.Printf
Printf(format string, v ...interface{})
// Verbose should return true when verbose logging output is wanted
Verbose() bool
}

981
vendor/github.com/golang-migrate/migrate/v4/migrate.go generated vendored Normal file
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// Package migrate reads migrations from sources and runs them against databases.
// Sources are defined by the `source.Driver` and databases by the `database.Driver`
// interface. The driver interfaces are kept "dumb", all migration logic is kept
// in this package.
package migrate
import (
"errors"
"fmt"
"os"
"sync"
"time"
"github.com/hashicorp/go-multierror"
"github.com/golang-migrate/migrate/v4/database"
iurl "github.com/golang-migrate/migrate/v4/internal/url"
"github.com/golang-migrate/migrate/v4/source"
)
// DefaultPrefetchMigrations sets the number of migrations to pre-read
// from the source. This is helpful if the source is remote, but has little
// effect for a local source (i.e. file system).
// Please note that this setting has a major impact on the memory usage,
// since each pre-read migration is buffered in memory. See DefaultBufferSize.
var DefaultPrefetchMigrations = uint(10)
// DefaultLockTimeout sets the max time a database driver has to acquire a lock.
var DefaultLockTimeout = 15 * time.Second
var (
ErrNoChange = errors.New("no change")
ErrNilVersion = errors.New("no migration")
ErrInvalidVersion = errors.New("version must be >= -1")
ErrLocked = errors.New("database locked")
ErrLockTimeout = errors.New("timeout: can't acquire database lock")
)
// ErrShortLimit is an error returned when not enough migrations
// can be returned by a source for a given limit.
type ErrShortLimit struct {
Short uint
}
// Error implements the error interface.
func (e ErrShortLimit) Error() string {
return fmt.Sprintf("limit %v short", e.Short)
}
type ErrDirty struct {
Version int
}
func (e ErrDirty) Error() string {
return fmt.Sprintf("Dirty database version %v. Fix and force version.", e.Version)
}
type Migrate struct {
sourceName string
sourceDrv source.Driver
databaseName string
databaseDrv database.Driver
// Log accepts a Logger interface
Log Logger
// GracefulStop accepts `true` and will stop executing migrations
// as soon as possible at a safe break point, so that the database
// is not corrupted.
GracefulStop chan bool
isLockedMu *sync.Mutex
isGracefulStop bool
isLocked bool
// PrefetchMigrations defaults to DefaultPrefetchMigrations,
// but can be set per Migrate instance.
PrefetchMigrations uint
// LockTimeout defaults to DefaultLockTimeout,
// but can be set per Migrate instance.
LockTimeout time.Duration
}
// New returns a new Migrate instance from a source URL and a database URL.
// The URL scheme is defined by each driver.
func New(sourceURL, databaseURL string) (*Migrate, error) {
m := newCommon()
sourceName, err := iurl.SchemeFromURL(sourceURL)
if err != nil {
return nil, err
}
m.sourceName = sourceName
databaseName, err := iurl.SchemeFromURL(databaseURL)
if err != nil {
return nil, err
}
m.databaseName = databaseName
sourceDrv, err := source.Open(sourceURL)
if err != nil {
return nil, err
}
m.sourceDrv = sourceDrv
databaseDrv, err := database.Open(databaseURL)
if err != nil {
return nil, err
}
m.databaseDrv = databaseDrv
return m, nil
}
// NewWithDatabaseInstance returns a new Migrate instance from a source URL
// and an existing database instance. The source URL scheme is defined by each driver.
// Use any string that can serve as an identifier during logging as databaseName.
// You are responsible for closing the underlying database client if necessary.
func NewWithDatabaseInstance(sourceURL string, databaseName string, databaseInstance database.Driver) (*Migrate, error) {
m := newCommon()
sourceName, err := iurl.SchemeFromURL(sourceURL)
if err != nil {
return nil, err
}
m.sourceName = sourceName
m.databaseName = databaseName
sourceDrv, err := source.Open(sourceURL)
if err != nil {
return nil, err
}
m.sourceDrv = sourceDrv
m.databaseDrv = databaseInstance
return m, nil
}
// NewWithSourceInstance returns a new Migrate instance from an existing source instance
// and a database URL. The database URL scheme is defined by each driver.
// Use any string that can serve as an identifier during logging as sourceName.
// You are responsible for closing the underlying source client if necessary.
func NewWithSourceInstance(sourceName string, sourceInstance source.Driver, databaseURL string) (*Migrate, error) {
m := newCommon()
databaseName, err := iurl.SchemeFromURL(databaseURL)
if err != nil {
return nil, err
}
m.databaseName = databaseName
m.sourceName = sourceName
databaseDrv, err := database.Open(databaseURL)
if err != nil {
return nil, err
}
m.databaseDrv = databaseDrv
m.sourceDrv = sourceInstance
return m, nil
}
// NewWithInstance returns a new Migrate instance from an existing source and
// database instance. Use any string that can serve as an identifier during logging
// as sourceName and databaseName. You are responsible for closing down
// the underlying source and database client if necessary.
func NewWithInstance(sourceName string, sourceInstance source.Driver, databaseName string, databaseInstance database.Driver) (*Migrate, error) {
m := newCommon()
m.sourceName = sourceName
m.databaseName = databaseName
m.sourceDrv = sourceInstance
m.databaseDrv = databaseInstance
return m, nil
}
func newCommon() *Migrate {
return &Migrate{
GracefulStop: make(chan bool, 1),
PrefetchMigrations: DefaultPrefetchMigrations,
LockTimeout: DefaultLockTimeout,
isLockedMu: &sync.Mutex{},
}
}
// Close closes the source and the database.
func (m *Migrate) Close() (source error, database error) {
databaseSrvClose := make(chan error)
sourceSrvClose := make(chan error)
m.logVerbosePrintf("Closing source and database\n")
go func() {
databaseSrvClose <- m.databaseDrv.Close()
}()
go func() {
sourceSrvClose <- m.sourceDrv.Close()
}()
return <-sourceSrvClose, <-databaseSrvClose
}
// Migrate looks at the currently active migration version,
// then migrates either up or down to the specified version.
func (m *Migrate) Migrate(version uint) error {
if err := m.lock(); err != nil {
return err
}
curVersion, dirty, err := m.databaseDrv.Version()
if err != nil {
return m.unlockErr(err)
}
if dirty {
return m.unlockErr(ErrDirty{curVersion})
}
ret := make(chan interface{}, m.PrefetchMigrations)
go m.read(curVersion, int(version), ret)
return m.unlockErr(m.runMigrations(ret))
}
// Steps looks at the currently active migration version.
// It will migrate up if n > 0, and down if n < 0.
func (m *Migrate) Steps(n int) error {
if n == 0 {
return ErrNoChange
}
if err := m.lock(); err != nil {
return err
}
curVersion, dirty, err := m.databaseDrv.Version()
if err != nil {
return m.unlockErr(err)
}
if dirty {
return m.unlockErr(ErrDirty{curVersion})
}
ret := make(chan interface{}, m.PrefetchMigrations)
if n > 0 {
go m.readUp(curVersion, n, ret)
} else {
go m.readDown(curVersion, -n, ret)
}
return m.unlockErr(m.runMigrations(ret))
}
// Up looks at the currently active migration version
// and will migrate all the way up (applying all up migrations).
func (m *Migrate) Up() error {
if err := m.lock(); err != nil {
return err
}
curVersion, dirty, err := m.databaseDrv.Version()
if err != nil {
return m.unlockErr(err)
}
if dirty {
return m.unlockErr(ErrDirty{curVersion})
}
ret := make(chan interface{}, m.PrefetchMigrations)
go m.readUp(curVersion, -1, ret)
return m.unlockErr(m.runMigrations(ret))
}
// Down looks at the currently active migration version
// and will migrate all the way down (applying all down migrations).
func (m *Migrate) Down() error {
if err := m.lock(); err != nil {
return err
}
curVersion, dirty, err := m.databaseDrv.Version()
if err != nil {
return m.unlockErr(err)
}
if dirty {
return m.unlockErr(ErrDirty{curVersion})
}
ret := make(chan interface{}, m.PrefetchMigrations)
go m.readDown(curVersion, -1, ret)
return m.unlockErr(m.runMigrations(ret))
}
// Drop deletes everything in the database.
func (m *Migrate) Drop() error {
if err := m.lock(); err != nil {
return err
}
if err := m.databaseDrv.Drop(); err != nil {
return m.unlockErr(err)
}
return m.unlock()
}
// Run runs any migration provided by you against the database.
// It does not check any currently active version in database.
// Usually you don't need this function at all. Use Migrate,
// Steps, Up or Down instead.
func (m *Migrate) Run(migration ...*Migration) error {
if len(migration) == 0 {
return ErrNoChange
}
if err := m.lock(); err != nil {
return err
}
curVersion, dirty, err := m.databaseDrv.Version()
if err != nil {
return m.unlockErr(err)
}
if dirty {
return m.unlockErr(ErrDirty{curVersion})
}
ret := make(chan interface{}, m.PrefetchMigrations)
go func() {
defer close(ret)
for _, migr := range migration {
if m.PrefetchMigrations > 0 && migr.Body != nil {
m.logVerbosePrintf("Start buffering %v\n", migr.LogString())
} else {
m.logVerbosePrintf("Scheduled %v\n", migr.LogString())
}
ret <- migr
go func(migr *Migration) {
if err := migr.Buffer(); err != nil {
m.logErr(err)
}
}(migr)
}
}()
return m.unlockErr(m.runMigrations(ret))
}
// Force sets a migration version.
// It does not check any currently active version in database.
// It resets the dirty state to false.
func (m *Migrate) Force(version int) error {
if version < -1 {
return ErrInvalidVersion
}
if err := m.lock(); err != nil {
return err
}
if err := m.databaseDrv.SetVersion(version, false); err != nil {
return m.unlockErr(err)
}
return m.unlock()
}
// Version returns the currently active migration version.
// If no migration has been applied, yet, it will return ErrNilVersion.
func (m *Migrate) Version() (version uint, dirty bool, err error) {
v, d, err := m.databaseDrv.Version()
if err != nil {
return 0, false, err
}
if v == database.NilVersion {
return 0, false, ErrNilVersion
}
return suint(v), d, nil
}
// read reads either up or down migrations from source `from` to `to`.
// Each migration is then written to the ret channel.
// If an error occurs during reading, that error is written to the ret channel, too.
// Once read is done reading it will close the ret channel.
func (m *Migrate) read(from int, to int, ret chan<- interface{}) {
defer close(ret)
// check if from version exists
if from >= 0 {
if err := m.versionExists(suint(from)); err != nil {
ret <- err
return
}
}
// check if to version exists
if to >= 0 {
if err := m.versionExists(suint(to)); err != nil {
ret <- err
return
}
}
// no change?
if from == to {
ret <- ErrNoChange
return
}
if from < to {
// it's going up
// apply first migration if from is nil version
if from == -1 {
firstVersion, err := m.sourceDrv.First()
if err != nil {
ret <- err
return
}
migr, err := m.newMigration(firstVersion, int(firstVersion))
if err != nil {
ret <- err
return
}
ret <- migr
go func() {
if err := migr.Buffer(); err != nil {
m.logErr(err)
}
}()
from = int(firstVersion)
}
// run until we reach target ...
for from < to {
if m.stop() {
return
}
next, err := m.sourceDrv.Next(suint(from))
if err != nil {
ret <- err
return
}
migr, err := m.newMigration(next, int(next))
if err != nil {
ret <- err
return
}
ret <- migr
go func() {
if err := migr.Buffer(); err != nil {
m.logErr(err)
}
}()
from = int(next)
}
} else {
// it's going down
// run until we reach target ...
for from > to && from >= 0 {
if m.stop() {
return
}
prev, err := m.sourceDrv.Prev(suint(from))
if errors.Is(err, os.ErrNotExist) && to == -1 {
// apply nil migration
migr, err := m.newMigration(suint(from), -1)
if err != nil {
ret <- err
return
}
ret <- migr
go func() {
if err := migr.Buffer(); err != nil {
m.logErr(err)
}
}()
return
} else if err != nil {
ret <- err
return
}
migr, err := m.newMigration(suint(from), int(prev))
if err != nil {
ret <- err
return
}
ret <- migr
go func() {
if err := migr.Buffer(); err != nil {
m.logErr(err)
}
}()
from = int(prev)
}
}
}
// readUp reads up migrations from `from` limitted by `limit`.
// limit can be -1, implying no limit and reading until there are no more migrations.
// Each migration is then written to the ret channel.
// If an error occurs during reading, that error is written to the ret channel, too.
// Once readUp is done reading it will close the ret channel.
func (m *Migrate) readUp(from int, limit int, ret chan<- interface{}) {
defer close(ret)
// check if from version exists
if from >= 0 {
if err := m.versionExists(suint(from)); err != nil {
ret <- err
return
}
}
if limit == 0 {
ret <- ErrNoChange
return
}
count := 0
for count < limit || limit == -1 {
if m.stop() {
return
}
// apply first migration if from is nil version
if from == -1 {
firstVersion, err := m.sourceDrv.First()
if err != nil {
ret <- err
return
}
migr, err := m.newMigration(firstVersion, int(firstVersion))
if err != nil {
ret <- err
return
}
ret <- migr
go func() {
if err := migr.Buffer(); err != nil {
m.logErr(err)
}
}()
from = int(firstVersion)
count++
continue
}
// apply next migration
next, err := m.sourceDrv.Next(suint(from))
if errors.Is(err, os.ErrNotExist) {
// no limit, but no migrations applied?
if limit == -1 && count == 0 {
ret <- ErrNoChange
return
}
// no limit, reached end
if limit == -1 {
return
}
// reached end, and didn't apply any migrations
if limit > 0 && count == 0 {
ret <- os.ErrNotExist
return
}
// applied less migrations than limit?
if count < limit {
ret <- ErrShortLimit{suint(limit - count)}
return
}
}
if err != nil {
ret <- err
return
}
migr, err := m.newMigration(next, int(next))
if err != nil {
ret <- err
return
}
ret <- migr
go func() {
if err := migr.Buffer(); err != nil {
m.logErr(err)
}
}()
from = int(next)
count++
}
}
// readDown reads down migrations from `from` limitted by `limit`.
// limit can be -1, implying no limit and reading until there are no more migrations.
// Each migration is then written to the ret channel.
// If an error occurs during reading, that error is written to the ret channel, too.
// Once readDown is done reading it will close the ret channel.
func (m *Migrate) readDown(from int, limit int, ret chan<- interface{}) {
defer close(ret)
// check if from version exists
if from >= 0 {
if err := m.versionExists(suint(from)); err != nil {
ret <- err
return
}
}
if limit == 0 {
ret <- ErrNoChange
return
}
// no change if already at nil version
if from == -1 && limit == -1 {
ret <- ErrNoChange
return
}
// can't go over limit if already at nil version
if from == -1 && limit > 0 {
ret <- os.ErrNotExist
return
}
count := 0
for count < limit || limit == -1 {
if m.stop() {
return
}
prev, err := m.sourceDrv.Prev(suint(from))
if errors.Is(err, os.ErrNotExist) {
// no limit or haven't reached limit, apply "first" migration
if limit == -1 || limit-count > 0 {
firstVersion, err := m.sourceDrv.First()
if err != nil {
ret <- err
return
}
migr, err := m.newMigration(firstVersion, -1)
if err != nil {
ret <- err
return
}
ret <- migr
go func() {
if err := migr.Buffer(); err != nil {
m.logErr(err)
}
}()
count++
}
if count < limit {
ret <- ErrShortLimit{suint(limit - count)}
}
return
}
if err != nil {
ret <- err
return
}
migr, err := m.newMigration(suint(from), int(prev))
if err != nil {
ret <- err
return
}
ret <- migr
go func() {
if err := migr.Buffer(); err != nil {
m.logErr(err)
}
}()
from = int(prev)
count++
}
}
// runMigrations reads *Migration and error from a channel. Any other type
// sent on this channel will result in a panic. Each migration is then
// proxied to the database driver and run against the database.
// Before running a newly received migration it will check if it's supposed
// to stop execution because it might have received a stop signal on the
// GracefulStop channel.
func (m *Migrate) runMigrations(ret <-chan interface{}) error {
for r := range ret {
if m.stop() {
return nil
}
switch r := r.(type) {
case error:
return r
case *Migration:
migr := r
// set version with dirty state
if err := m.databaseDrv.SetVersion(migr.TargetVersion, true); err != nil {
return err
}
if migr.Body != nil {
m.logVerbosePrintf("Read and execute %v\n", migr.LogString())
if err := m.databaseDrv.Run(migr.BufferedBody); err != nil {
return err
}
}
// set clean state
if err := m.databaseDrv.SetVersion(migr.TargetVersion, false); err != nil {
return err
}
endTime := time.Now()
readTime := migr.FinishedReading.Sub(migr.StartedBuffering)
runTime := endTime.Sub(migr.FinishedReading)
// log either verbose or normal
if m.Log != nil {
if m.Log.Verbose() {
m.logPrintf("Finished %v (read %v, ran %v)\n", migr.LogString(), readTime, runTime)
} else {
m.logPrintf("%v (%v)\n", migr.LogString(), readTime+runTime)
}
}
default:
return fmt.Errorf("unknown type: %T with value: %+v", r, r)
}
}
return nil
}
// versionExists checks the source if either the up or down migration for
// the specified migration version exists.
func (m *Migrate) versionExists(version uint) (result error) {
// try up migration first
up, _, err := m.sourceDrv.ReadUp(version)
if err == nil {
defer func() {
if errClose := up.Close(); errClose != nil {
result = multierror.Append(result, errClose)
}
}()
}
if errors.Is(err, os.ErrExist) {
return nil
} else if !errors.Is(err, os.ErrNotExist) {
return err
}
// then try down migration
down, _, err := m.sourceDrv.ReadDown(version)
if err == nil {
defer func() {
if errClose := down.Close(); errClose != nil {
result = multierror.Append(result, errClose)
}
}()
}
if errors.Is(err, os.ErrExist) {
return nil
} else if !errors.Is(err, os.ErrNotExist) {
return err
}
err = fmt.Errorf("no migration found for version %d: %w", version, err)
m.logErr(err)
return err
}
// stop returns true if no more migrations should be run against the database
// because a stop signal was received on the GracefulStop channel.
// Calls are cheap and this function is not blocking.
func (m *Migrate) stop() bool {
if m.isGracefulStop {
return true
}
select {
case <-m.GracefulStop:
m.isGracefulStop = true
return true
default:
return false
}
}
// newMigration is a helper func that returns a *Migration for the
// specified version and targetVersion.
func (m *Migrate) newMigration(version uint, targetVersion int) (*Migration, error) {
var migr *Migration
if targetVersion >= int(version) {
r, identifier, err := m.sourceDrv.ReadUp(version)
if errors.Is(err, os.ErrNotExist) {
// create "empty" migration
migr, err = NewMigration(nil, "", version, targetVersion)
if err != nil {
return nil, err
}
} else if err != nil {
return nil, err
} else {
// create migration from up source
migr, err = NewMigration(r, identifier, version, targetVersion)
if err != nil {
return nil, err
}
}
} else {
r, identifier, err := m.sourceDrv.ReadDown(version)
if errors.Is(err, os.ErrNotExist) {
// create "empty" migration
migr, err = NewMigration(nil, "", version, targetVersion)
if err != nil {
return nil, err
}
} else if err != nil {
return nil, err
} else {
// create migration from down source
migr, err = NewMigration(r, identifier, version, targetVersion)
if err != nil {
return nil, err
}
}
}
if m.PrefetchMigrations > 0 && migr.Body != nil {
m.logVerbosePrintf("Start buffering %v\n", migr.LogString())
} else {
m.logVerbosePrintf("Scheduled %v\n", migr.LogString())
}
return migr, nil
}
// lock is a thread safe helper function to lock the database.
// It should be called as late as possible when running migrations.
func (m *Migrate) lock() error {
m.isLockedMu.Lock()
defer m.isLockedMu.Unlock()
if m.isLocked {
return ErrLocked
}
// create done channel, used in the timeout goroutine
done := make(chan bool, 1)
defer func() {
done <- true
}()
// use errchan to signal error back to this context
errchan := make(chan error, 2)
// start timeout goroutine
timeout := time.After(m.LockTimeout)
go func() {
for {
select {
case <-done:
return
case <-timeout:
errchan <- ErrLockTimeout
return
}
}
}()
// now try to acquire the lock
go func() {
if err := m.databaseDrv.Lock(); err != nil {
errchan <- err
} else {
errchan <- nil
}
}()
// wait until we either receive ErrLockTimeout or error from Lock operation
err := <-errchan
if err == nil {
m.isLocked = true
}
return err
}
// unlock is a thread safe helper function to unlock the database.
// It should be called as early as possible when no more migrations are
// expected to be executed.
func (m *Migrate) unlock() error {
m.isLockedMu.Lock()
defer m.isLockedMu.Unlock()
if err := m.databaseDrv.Unlock(); err != nil {
// BUG: Can potentially create a deadlock. Add a timeout.
return err
}
m.isLocked = false
return nil
}
// unlockErr calls unlock and returns a combined error
// if a prevErr is not nil.
func (m *Migrate) unlockErr(prevErr error) error {
if err := m.unlock(); err != nil {
return multierror.Append(prevErr, err)
}
return prevErr
}
// logPrintf writes to m.Log if not nil
func (m *Migrate) logPrintf(format string, v ...interface{}) {
if m.Log != nil {
m.Log.Printf(format, v...)
}
}
// logVerbosePrintf writes to m.Log if not nil. Use for verbose logging output.
func (m *Migrate) logVerbosePrintf(format string, v ...interface{}) {
if m.Log != nil && m.Log.Verbose() {
m.Log.Printf(format, v...)
}
}
// logErr writes error to m.Log if not nil
func (m *Migrate) logErr(err error) {
if m.Log != nil {
m.Log.Printf("error: %v", err)
}
}

160
vendor/github.com/golang-migrate/migrate/v4/migration.go generated vendored Normal file
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package migrate
import (
"bufio"
"fmt"
"io"
"time"
)
// DefaultBufferSize sets the in memory buffer size (in Bytes) for every
// pre-read migration (see DefaultPrefetchMigrations).
var DefaultBufferSize = uint(100000)
// Migration holds information about a migration.
// It is initially created from data coming from the source and then
// used when run against the database.
type Migration struct {
// Identifier can be any string to help identifying
// the migration in the source.
Identifier string
// Version is the version of this migration.
Version uint
// TargetVersion is the migration version after this migration
// has been applied to the database.
// Can be -1, implying that this is a NilVersion.
TargetVersion int
// Body holds an io.ReadCloser to the source.
Body io.ReadCloser
// BufferedBody holds an buffered io.Reader to the underlying Body.
BufferedBody io.Reader
// BufferSize defaults to DefaultBufferSize
BufferSize uint
// bufferWriter holds an io.WriteCloser and pipes to BufferBody.
// It's an *Closer for flow control.
bufferWriter io.WriteCloser
// Scheduled is the time when the migration was scheduled/ queued.
Scheduled time.Time
// StartedBuffering is the time when buffering of the migration source started.
StartedBuffering time.Time
// FinishedBuffering is the time when buffering of the migration source finished.
FinishedBuffering time.Time
// FinishedReading is the time when the migration source is fully read.
FinishedReading time.Time
// BytesRead holds the number of Bytes read from the migration source.
BytesRead int64
}
// NewMigration returns a new Migration and sets the body, identifier,
// version and targetVersion. Body can be nil, which turns this migration
// into a "NilMigration". If no identifier is provided, it will default to "<empty>".
// targetVersion can be -1, implying it is a NilVersion.
//
// What is a NilMigration?
// Usually each migration version coming from source is expected to have an
// Up and Down migration. This is not a hard requirement though, leading to
// a situation where only the Up or Down migration is present. So let's say
// the user wants to migrate up to a version that doesn't have the actual Up
// migration, in that case we still want to apply the version, but with an empty
// body. We are calling that a NilMigration, a migration with an empty body.
//
// What is a NilVersion?
// NilVersion is a const(-1). When running down migrations and we are at the
// last down migration, there is no next down migration, the targetVersion should
// be nil. Nil in this case is represented by -1 (because type int).
func NewMigration(body io.ReadCloser, identifier string,
version uint, targetVersion int) (*Migration, error) {
tnow := time.Now()
m := &Migration{
Identifier: identifier,
Version: version,
TargetVersion: targetVersion,
Scheduled: tnow,
}
if body == nil {
if len(identifier) == 0 {
m.Identifier = "<empty>"
}
m.StartedBuffering = tnow
m.FinishedBuffering = tnow
m.FinishedReading = tnow
return m, nil
}
br, bw := io.Pipe()
m.Body = body // want to simulate low latency? newSlowReader(body)
m.BufferSize = DefaultBufferSize
m.BufferedBody = br
m.bufferWriter = bw
return m, nil
}
// String implements string.Stringer and is used in tests.
func (m *Migration) String() string {
return fmt.Sprintf("%v [%v=>%v]", m.Identifier, m.Version, m.TargetVersion)
}
// LogString returns a string describing this migration to humans.
func (m *Migration) LogString() string {
directionStr := "u"
if m.TargetVersion < int(m.Version) {
directionStr = "d"
}
return fmt.Sprintf("%v/%v %v", m.Version, directionStr, m.Identifier)
}
// Buffer buffers Body up to BufferSize.
// Calling this function blocks. Call with goroutine.
func (m *Migration) Buffer() error {
if m.Body == nil {
return nil
}
m.StartedBuffering = time.Now()
b := bufio.NewReaderSize(m.Body, int(m.BufferSize))
// start reading from body, peek won't move the read pointer though
// poor man's solution?
if _, err := b.Peek(int(m.BufferSize)); err != nil && err != io.EOF {
return err
}
m.FinishedBuffering = time.Now()
// write to bufferWriter, this will block until
// something starts reading from m.Buffer
n, err := b.WriteTo(m.bufferWriter)
if err != nil {
return err
}
m.FinishedReading = time.Now()
m.BytesRead = n
// close bufferWriter so Buffer knows that there is no
// more data coming
if err := m.bufferWriter.Close(); err != nil {
return err
}
// it's safe to close the Body too
if err := m.Body.Close(); err != nil {
return err
}
return nil
}

118
vendor/github.com/golang-migrate/migrate/v4/source/driver.go generated vendored Normal file
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// Package source provides the Source interface.
// All source drivers must implement this interface, register themselves,
// optionally provide a `WithInstance` function and pass the tests
// in package source/testing.
package source
import (
"fmt"
"io"
nurl "net/url"
"sync"
)
var driversMu sync.RWMutex
var drivers = make(map[string]Driver)
// Driver is the interface every source driver must implement.
//
// How to implement a source driver?
// 1. Implement this interface.
// 2. Optionally, add a function named `WithInstance`.
// This function should accept an existing source instance and a Config{} struct
// and return a driver instance.
// 3. Add a test that calls source/testing.go:Test()
// 4. Add own tests for Open(), WithInstance() (when provided) and Close().
// All other functions are tested by tests in source/testing.
// Saves you some time and makes sure all source drivers behave the same way.
// 5. Call Register in init().
//
// Guidelines:
// * All configuration input must come from the URL string in func Open()
// or the Config{} struct in WithInstance. Don't os.Getenv().
// * Drivers are supposed to be read only.
// * Ideally don't load any contents (into memory) in Open or WithInstance.
type Driver interface {
// Open returns a a new driver instance configured with parameters
// coming from the URL string. Migrate will call this function
// only once per instance.
Open(url string) (Driver, error)
// Close closes the underlying source instance managed by the driver.
// Migrate will call this function only once per instance.
Close() error
// First returns the very first migration version available to the driver.
// Migrate will call this function multiple times.
// If there is no version available, it must return os.ErrNotExist.
First() (version uint, err error)
// Prev returns the previous version for a given version available to the driver.
// Migrate will call this function multiple times.
// If there is no previous version available, it must return os.ErrNotExist.
Prev(version uint) (prevVersion uint, err error)
// Next returns the next version for a given version available to the driver.
// Migrate will call this function multiple times.
// If there is no next version available, it must return os.ErrNotExist.
Next(version uint) (nextVersion uint, err error)
// ReadUp returns the UP migration body and an identifier that helps
// finding this migration in the source for a given version.
// If there is no up migration available for this version,
// it must return os.ErrNotExist.
// Do not start reading, just return the ReadCloser!
ReadUp(version uint) (r io.ReadCloser, identifier string, err error)
// ReadDown returns the DOWN migration body and an identifier that helps
// finding this migration in the source for a given version.
// If there is no down migration available for this version,
// it must return os.ErrNotExist.
// Do not start reading, just return the ReadCloser!
ReadDown(version uint) (r io.ReadCloser, identifier string, err error)
}
// Open returns a new driver instance.
func Open(url string) (Driver, error) {
u, err := nurl.Parse(url)
if err != nil {
return nil, err
}
if u.Scheme == "" {
return nil, fmt.Errorf("source driver: invalid URL scheme")
}
driversMu.RLock()
d, ok := drivers[u.Scheme]
driversMu.RUnlock()
if !ok {
return nil, fmt.Errorf("source driver: unknown driver '%s' (forgotten import?)", u.Scheme)
}
return d.Open(url)
}
// Register globally registers a driver.
func Register(name string, driver Driver) {
driversMu.Lock()
defer driversMu.Unlock()
if driver == nil {
panic("Register driver is nil")
}
if _, dup := drivers[name]; dup {
panic("Register called twice for driver " + name)
}
drivers[name] = driver
}
// List lists the registered drivers
func List() []string {
driversMu.RLock()
defer driversMu.RUnlock()
names := make([]string, 0, len(drivers))
for n := range drivers {
names = append(names, n)
}
return names
}

15
vendor/github.com/golang-migrate/migrate/v4/source/errors.go generated vendored Normal file
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package source
import "os"
// ErrDuplicateMigration is an error type for reporting duplicate migration
// files.
type ErrDuplicateMigration struct {
Migration
os.FileInfo
}
// Error implements error interface.
func (e ErrDuplicateMigration) Error() string {
return "duplicate migration file: " + e.Name()
}

3
vendor/github.com/golang-migrate/migrate/v4/source/iofs/README.md generated vendored Normal file
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# iofs
https://pkg.go.dev/github.com/golang-migrate/migrate/v4/source/iofs

10
vendor/github.com/golang-migrate/migrate/v4/source/iofs/doc.go generated vendored Normal file
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/*
Package iofs provides the Go 1.16+ io/fs#FS driver.
It can accept various file systems (like embed.FS, archive/zip#Reader) implementing io/fs#FS.
This driver cannot be used with Go versions 1.15 and below.
Also, Opening with a URL scheme is not supported.
*/
package iofs

176
vendor/github.com/golang-migrate/migrate/v4/source/iofs/iofs.go generated vendored Normal file
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//go:build go1.16
// +build go1.16
package iofs
import (
"errors"
"fmt"
"io"
"io/fs"
"path"
"strconv"
"github.com/golang-migrate/migrate/v4/source"
)
type driver struct {
PartialDriver
}
// New returns a new Driver from io/fs#FS and a relative path.
func New(fsys fs.FS, path string) (source.Driver, error) {
var i driver
if err := i.Init(fsys, path); err != nil {
return nil, fmt.Errorf("failed to init driver with path %s: %w", path, err)
}
return &i, nil
}
// Open is part of source.Driver interface implementation.
// Open cannot be called on the iofs passthrough driver.
func (d *driver) Open(url string) (source.Driver, error) {
return nil, errors.New("Open() cannot be called on the iofs passthrough driver")
}
// PartialDriver is a helper service for creating new source drivers working with
// io/fs.FS instances. It implements all source.Driver interface methods
// except for Open(). New driver could embed this struct and add missing Open()
// method.
//
// To prepare PartialDriver for use Init() function.
type PartialDriver struct {
migrations *source.Migrations
fsys fs.FS
path string
}
// Init prepares not initialized IoFS instance to read migrations from a
// io/fs#FS instance and a relative path.
func (d *PartialDriver) Init(fsys fs.FS, path string) error {
entries, err := fs.ReadDir(fsys, path)
if err != nil {
return err
}
ms := source.NewMigrations()
for _, e := range entries {
if e.IsDir() {
continue
}
m, err := source.DefaultParse(e.Name())
if err != nil {
continue
}
file, err := e.Info()
if err != nil {
return err
}
if !ms.Append(m) {
return source.ErrDuplicateMigration{
Migration: *m,
FileInfo: file,
}
}
}
d.fsys = fsys
d.path = path
d.migrations = ms
return nil
}
// Close is part of source.Driver interface implementation.
// Closes the file system if possible.
func (d *PartialDriver) Close() error {
c, ok := d.fsys.(io.Closer)
if !ok {
return nil
}
return c.Close()
}
// First is part of source.Driver interface implementation.
func (d *PartialDriver) First() (version uint, err error) {
if version, ok := d.migrations.First(); ok {
return version, nil
}
return 0, &fs.PathError{
Op: "first",
Path: d.path,
Err: fs.ErrNotExist,
}
}
// Prev is part of source.Driver interface implementation.
func (d *PartialDriver) Prev(version uint) (prevVersion uint, err error) {
if version, ok := d.migrations.Prev(version); ok {
return version, nil
}
return 0, &fs.PathError{
Op: "prev for version " + strconv.FormatUint(uint64(version), 10),
Path: d.path,
Err: fs.ErrNotExist,
}
}
// Next is part of source.Driver interface implementation.
func (d *PartialDriver) Next(version uint) (nextVersion uint, err error) {
if version, ok := d.migrations.Next(version); ok {
return version, nil
}
return 0, &fs.PathError{
Op: "next for version " + strconv.FormatUint(uint64(version), 10),
Path: d.path,
Err: fs.ErrNotExist,
}
}
// ReadUp is part of source.Driver interface implementation.
func (d *PartialDriver) ReadUp(version uint) (r io.ReadCloser, identifier string, err error) {
if m, ok := d.migrations.Up(version); ok {
body, err := d.open(path.Join(d.path, m.Raw))
if err != nil {
return nil, "", err
}
return body, m.Identifier, nil
}
return nil, "", &fs.PathError{
Op: "read up for version " + strconv.FormatUint(uint64(version), 10),
Path: d.path,
Err: fs.ErrNotExist,
}
}
// ReadDown is part of source.Driver interface implementation.
func (d *PartialDriver) ReadDown(version uint) (r io.ReadCloser, identifier string, err error) {
if m, ok := d.migrations.Down(version); ok {
body, err := d.open(path.Join(d.path, m.Raw))
if err != nil {
return nil, "", err
}
return body, m.Identifier, nil
}
return nil, "", &fs.PathError{
Op: "read down for version " + strconv.FormatUint(uint64(version), 10),
Path: d.path,
Err: fs.ErrNotExist,
}
}
func (d *PartialDriver) open(path string) (fs.File, error) {
f, err := d.fsys.Open(path)
if err == nil {
return f, nil
}
// Some non-standard file systems may return errors that don't include the path, that
// makes debugging harder.
if !errors.As(err, new(*fs.PathError)) {
err = &fs.PathError{
Op: "open",
Path: path,
Err: err,
}
}
return nil, err
}

1
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1
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1 up

1
vendor/github.com/golang-migrate/migrate/v4/source/iofs/testdata/migrations/3_foobar.up.sql generated vendored Normal file
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3 up

1
vendor/github.com/golang-migrate/migrate/v4/source/iofs/testdata/migrations/4_foobar.down.sql generated vendored Normal file
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4 down

1
vendor/github.com/golang-migrate/migrate/v4/source/iofs/testdata/migrations/4_foobar.up.sql generated vendored Normal file
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4 up

1
vendor/github.com/golang-migrate/migrate/v4/source/iofs/testdata/migrations/5_foobar.down.sql generated vendored Normal file
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5 down

1
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7 down

1
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7 up

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package source
import (
"sort"
)
// Direction is either up or down.
type Direction string
const (
Down Direction = "down"
Up Direction = "up"
)
// Migration is a helper struct for source drivers that need to
// build the full directory tree in memory.
// Migration is fully independent from migrate.Migration.
type Migration struct {
// Version is the version of this migration.
Version uint
// Identifier can be any string that helps identifying
// this migration in the source.
Identifier string
// Direction is either Up or Down.
Direction Direction
// Raw holds the raw location path to this migration in source.
// ReadUp and ReadDown will use this.
Raw string
}
// Migrations wraps Migration and has an internal index
// to keep track of Migration order.
type Migrations struct {
index uintSlice
migrations map[uint]map[Direction]*Migration
}
func NewMigrations() *Migrations {
return &Migrations{
index: make(uintSlice, 0),
migrations: make(map[uint]map[Direction]*Migration),
}
}
func (i *Migrations) Append(m *Migration) (ok bool) {
if m == nil {
return false
}
if i.migrations[m.Version] == nil {
i.migrations[m.Version] = make(map[Direction]*Migration)
}
// reject duplicate versions
if _, dup := i.migrations[m.Version][m.Direction]; dup {
return false
}
i.migrations[m.Version][m.Direction] = m
i.buildIndex()
return true
}
func (i *Migrations) buildIndex() {
i.index = make(uintSlice, 0)
for version := range i.migrations {
i.index = append(i.index, version)
}
sort.Sort(i.index)
}
func (i *Migrations) First() (version uint, ok bool) {
if len(i.index) == 0 {
return 0, false
}
return i.index[0], true
}
func (i *Migrations) Prev(version uint) (prevVersion uint, ok bool) {
pos := i.findPos(version)
if pos >= 1 && len(i.index) > pos-1 {
return i.index[pos-1], true
}
return 0, false
}
func (i *Migrations) Next(version uint) (nextVersion uint, ok bool) {
pos := i.findPos(version)
if pos >= 0 && len(i.index) > pos+1 {
return i.index[pos+1], true
}
return 0, false
}
func (i *Migrations) Up(version uint) (m *Migration, ok bool) {
if _, ok := i.migrations[version]; ok {
if mx, ok := i.migrations[version][Up]; ok {
return mx, true
}
}
return nil, false
}
func (i *Migrations) Down(version uint) (m *Migration, ok bool) {
if _, ok := i.migrations[version]; ok {
if mx, ok := i.migrations[version][Down]; ok {
return mx, true
}
}
return nil, false
}
func (i *Migrations) findPos(version uint) int {
if len(i.index) > 0 {
ix := i.index.Search(version)
if ix < len(i.index) && i.index[ix] == version {
return ix
}
}
return -1
}
type uintSlice []uint
func (s uintSlice) Len() int {
return len(s)
}
func (s uintSlice) Swap(i, j int) {
s[i], s[j] = s[j], s[i]
}
func (s uintSlice) Less(i, j int) bool {
return s[i] < s[j]
}
func (s uintSlice) Search(x uint) int {
return sort.Search(len(s), func(i int) bool { return s[i] >= x })
}

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package source
import (
"fmt"
"regexp"
"strconv"
)
var (
ErrParse = fmt.Errorf("no match")
)
var (
DefaultParse = Parse
DefaultRegex = Regex
)
// Regex matches the following pattern:
// 123_name.up.ext
// 123_name.down.ext
var Regex = regexp.MustCompile(`^([0-9]+)_(.*)\.(` + string(Down) + `|` + string(Up) + `)\.(.*)$`)
// Parse returns Migration for matching Regex pattern.
func Parse(raw string) (*Migration, error) {
m := Regex.FindStringSubmatch(raw)
if len(m) == 5 {
versionUint64, err := strconv.ParseUint(m[1], 10, 64)
if err != nil {
return nil, err
}
return &Migration{
Version: uint(versionUint64),
Identifier: m[2],
Direction: Direction(m[3]),
Raw: raw,
}, nil
}
return nil, ErrParse
}

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package migrate
import (
"fmt"
nurl "net/url"
"strings"
)
// MultiError holds multiple errors.
//
// Deprecated: Use github.com/hashicorp/go-multierror instead
type MultiError struct {
Errs []error
}
// NewMultiError returns an error type holding multiple errors.
//
// Deprecated: Use github.com/hashicorp/go-multierror instead
//
func NewMultiError(errs ...error) MultiError {
compactErrs := make([]error, 0)
for _, e := range errs {
if e != nil {
compactErrs = append(compactErrs, e)
}
}
return MultiError{compactErrs}
}
// Error implements error. Multiple errors are concatenated with 'and's.
func (m MultiError) Error() string {
var strs = make([]string, 0)
for _, e := range m.Errs {
if len(e.Error()) > 0 {
strs = append(strs, e.Error())
}
}
return strings.Join(strs, " and ")
}
// suint safely converts int to uint
// see https://goo.gl/wEcqof
// see https://goo.gl/pai7Dr
func suint(n int) uint {
if n < 0 {
panic(fmt.Sprintf("suint(%v) expects input >= 0", n))
}
return uint(n)
}
// FilterCustomQuery filters all query values starting with `x-`
func FilterCustomQuery(u *nurl.URL) *nurl.URL {
ux := *u
vx := make(nurl.Values)
for k, v := range ux.Query() {
if len(k) <= 1 || (len(k) > 1 && k[0:2] != "x-") {
vx[k] = v
}
}
ux.RawQuery = vx.Encode()
return &ux
}

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Mozilla Public License, version 2.0
1. Definitions
1.1. “Contributor”
means each individual or legal entity that creates, contributes to the
creation of, or owns Covered Software.
1.2. “Contributor Version”
means the combination of the Contributions of others (if any) used by a
Contributor and that particular Contributor’s Contribution.
1.3. “Contribution”
means Covered Software of a particular Contributor.
1.4. “Covered Software”
means Source Code Form to which the initial Contributor has attached the
notice in Exhibit A, the Executable Form of such Source Code Form, and
Modifications of such Source Code Form, in each case including portions
thereof.
1.5. “Incompatible With Secondary Licenses”
means
a. that the initial Contributor has attached the notice described in
Exhibit B to the Covered Software; or
b. that the Covered Software was made available under the terms of version
1.1 or earlier of the License, but not also under the terms of a
Secondary License.
1.6. “Executable Form”
means any form of the work other than Source Code Form.
1.7. “Larger Work”
means a work that combines Covered Software with other material, in a separate
file or files, that is not Covered Software.
1.8. “License”
means this document.
1.9. “Licensable”
means having the right to grant, to the maximum extent possible, whether at the
time of the initial grant or subsequently, any and all of the rights conveyed by
this License.
1.10. “Modifications”
means any of the following:
a. any file in Source Code Form that results from an addition to, deletion
from, or modification of the contents of Covered Software; or
b. any new file in Source Code Form that contains any Covered Software.
1.11. “Patent Claims” of a Contributor
means any patent claim(s), including without limitation, method, process,
and apparatus claims, in any patent Licensable by such Contributor that
would be infringed, but for the grant of the License, by the making,
using, selling, offering for sale, having made, import, or transfer of
either its Contributions or its Contributor Version.
1.12. “Secondary License”
means either the GNU General Public License, Version 2.0, the GNU Lesser
General Public License, Version 2.1, the GNU Affero General Public
License, Version 3.0, or any later versions of those licenses.
1.13. “Source Code Form”
means the form of the work preferred for making modifications.
1.14. “You” (or “Your”)
means an individual or a legal entity exercising rights under this
License. For legal entities, “You” includes any entity that controls, is
controlled by, or is under common control with You. For purposes of this
definition, “control” means (a) the power, direct or indirect, to cause
the direction or management of such entity, whether by contract or
otherwise, or (b) ownership of more than fifty percent (50%) of the
outstanding shares or beneficial ownership of such entity.
2. License Grants and Conditions
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
a. under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or as
part of a Larger Work; and
b. under Patent Claims of such Contributor to make, use, sell, offer for
sale, have made, import, and otherwise transfer either its Contributions
or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution become
effective for each Contribution on the date the Contributor first distributes
such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under this
License. No additional rights or licenses will be implied from the distribution
or licensing of Covered Software under this License. Notwithstanding Section
2.1(b) above, no patent license is granted by a Contributor:
a. for any code that a Contributor has removed from Covered Software; or
b. for infringements caused by: (i) Your and any other third party’s
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
c. under Patent Claims infringed by Covered Software in the absence of its
Contributions.
This License does not grant any rights in the trademarks, service marks, or
logos of any Contributor (except as may be necessary to comply with the
notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this License
(see Section 10.2) or under the terms of a Secondary License (if permitted
under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its Contributions
are its original creation(s) or it has sufficient rights to grant the
rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under applicable
copyright doctrines of fair use, fair dealing, or other equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
Section 2.1.
3. Responsibilities
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under the
terms of this License. You must inform recipients that the Source Code Form
of the Covered Software is governed by the terms of this License, and how
they can obtain a copy of this License. You may not attempt to alter or
restrict the recipients’ rights in the Source Code Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
a. such Covered Software must also be made available in Source Code Form,
as described in Section 3.1, and You must inform recipients of the
Executable Form how they can obtain a copy of such Source Code Form by
reasonable means in a timely manner, at a charge no more than the cost
of distribution to the recipient; and
b. You may distribute such Executable Form under the terms of this License,
or sublicense it under different terms, provided that the license for
the Executable Form does not attempt to limit or alter the recipients’
rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for the
Covered Software. If the Larger Work is a combination of Covered Software
with a work governed by one or more Secondary Licenses, and the Covered
Software is not Incompatible With Secondary Licenses, this License permits
You to additionally distribute such Covered Software under the terms of
such Secondary License(s), so that the recipient of the Larger Work may, at
their option, further distribute the Covered Software under the terms of
either this License or such Secondary License(s).
3.4. Notices
You may not remove or alter the substance of any license notices (including
copyright notices, patent notices, disclaimers of warranty, or limitations
of liability) contained within the Source Code Form of the Covered
Software, except that You may alter any license notices to the extent
required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on behalf
of any Contributor. You must make it absolutely clear that any such
warranty, support, indemnity, or liability obligation is offered by You
alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
If it is impossible for You to comply with any of the terms of this License
with respect to some or all of the Covered Software due to statute, judicial
order, or regulation then You must: (a) comply with the terms of this License
to the maximum extent possible; and (b) describe the limitations and the code
they affect. Such description must be placed in a text file included with all
distributions of the Covered Software under this License. Except to the
extent prohibited by statute or regulation, such description must be
sufficiently detailed for a recipient of ordinary skill to be able to
understand it.
5. Termination
5.1. The rights granted under this License will terminate automatically if You
fail to comply with any of its terms. However, if You become compliant,
then the rights granted under this License from a particular Contributor
are reinstated (a) provisionally, unless and until such Contributor
explicitly and finally terminates Your grants, and (b) on an ongoing basis,
if such Contributor fails to notify You of the non-compliance by some
reasonable means prior to 60 days after You have come back into compliance.
Moreover, Your grants from a particular Contributor are reinstated on an
ongoing basis if such Contributor notifies You of the non-compliance by
some reasonable means, this is the first time You have received notice of
non-compliance with this License from such Contributor, and You become
compliant prior to 30 days after Your receipt of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions, counter-claims,
and cross-claims) alleging that a Contributor Version directly or
indirectly infringes any patent, then the rights granted to You by any and
all Contributors for the Covered Software under Section 2.1 of this License
shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
license agreements (excluding distributors and resellers) which have been
validly granted by You or Your distributors under this License prior to
termination shall survive termination.
6. Disclaimer of Warranty
Covered Software is provided under this License on an “as is” basis, without
warranty of any kind, either expressed, implied, or statutory, including,
without limitation, warranties that the Covered Software is free of defects,
merchantable, fit for a particular purpose or non-infringing. The entire
risk as to the quality and performance of the Covered Software is with You.
Should any Covered Software prove defective in any respect, You (not any
Contributor) assume the cost of any necessary servicing, repair, or
correction. This disclaimer of warranty constitutes an essential part of this
License. No use of any Covered Software is authorized under this License
except under this disclaimer.
7. Limitation of Liability
Under no circumstances and under no legal theory, whether tort (including
negligence), contract, or otherwise, shall any Contributor, or anyone who
distributes Covered Software as permitted above, be liable to You for any
direct, indirect, special, incidental, or consequential damages of any
character including, without limitation, damages for lost profits, loss of
goodwill, work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses, even if such party shall have been
informed of the possibility of such damages. This limitation of liability
shall not apply to liability for death or personal injury resulting from such
party’s negligence to the extent applicable law prohibits such limitation.
Some jurisdictions do not allow the exclusion or limitation of incidental or
consequential damages, so this exclusion and limitation may not apply to You.
8. Litigation
Any litigation relating to this License may be brought only in the courts of
a jurisdiction where the defendant maintains its principal place of business
and such litigation shall be governed by laws of that jurisdiction, without
reference to its conflict-of-law provisions. Nothing in this Section shall
prevent a party’s ability to bring cross-claims or counter-claims.
9. Miscellaneous
This License represents the complete agreement concerning the subject matter
hereof. If any provision of this License is held to be unenforceable, such
provision shall be reformed only to the extent necessary to make it
enforceable. Any law or regulation which provides that the language of a
contract shall be construed against the drafter shall not be used to construe
this License against a Contributor.
10. Versions of the License
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version of
the License under which You originally received the Covered Software, or
under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a modified
version of this License if you rename the license and remove any
references to the name of the license steward (except to note that such
modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary Licenses
If You choose to distribute Source Code Form that is Incompatible With
Secondary Licenses under the terms of this version of the License, the
notice described in Exhibit B of this License must be attached.
Exhibit A - Source Code Form License Notice
This Source Code Form is subject to the
terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not
distributed with this file, You can
obtain one at
http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular file, then
You may include the notice in a location (such as a LICENSE file in a relevant
directory) where a recipient would be likely to look for such a notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - “Incompatible With Secondary Licenses” Notice
This Source Code Form is “Incompatible
With Secondary Licenses”, as defined by
the Mozilla Public License, v. 2.0.

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# errwrap
`errwrap` is a package for Go that formalizes the pattern of wrapping errors
and checking if an error contains another error.
There is a common pattern in Go of taking a returned `error` value and
then wrapping it (such as with `fmt.Errorf`) before returning it. The problem
with this pattern is that you completely lose the original `error` structure.
Arguably the _correct_ approach is that you should make a custom structure
implementing the `error` interface, and have the original error as a field
on that structure, such [as this example](http://golang.org/pkg/os/#PathError).
This is a good approach, but you have to know the entire chain of possible
rewrapping that happens, when you might just care about one.
`errwrap` formalizes this pattern (it doesn't matter what approach you use
above) by giving a single interface for wrapping errors, checking if a specific
error is wrapped, and extracting that error.
## Installation and Docs
Install using `go get github.com/hashicorp/errwrap`.
Full documentation is available at
http://godoc.org/github.com/hashicorp/errwrap
## Usage
#### Basic Usage
Below is a very basic example of its usage:
```go
// A function that always returns an error, but wraps it, like a real
// function might.
func tryOpen() error {
_, err := os.Open("/i/dont/exist")
if err != nil {
return errwrap.Wrapf("Doesn't exist: {{err}}", err)
}
return nil
}
func main() {
err := tryOpen()
// We can use the Contains helpers to check if an error contains
// another error. It is safe to do this with a nil error, or with
// an error that doesn't even use the errwrap package.
if errwrap.Contains(err, "does not exist") {
// Do something
}
if errwrap.ContainsType(err, new(os.PathError)) {
// Do something
}
// Or we can use the associated `Get` functions to just extract
// a specific error. This would return nil if that specific error doesn't
// exist.
perr := errwrap.GetType(err, new(os.PathError))
}
```
#### Custom Types
If you're already making custom types that properly wrap errors, then
you can get all the functionality of `errwraps.Contains` and such by
implementing the `Wrapper` interface with just one function. Example:
```go
type AppError {
Code ErrorCode
Err error
}
func (e *AppError) WrappedErrors() []error {
return []error{e.Err}
}
```
Now this works:
```go
err := &AppError{Err: fmt.Errorf("an error")}
if errwrap.ContainsType(err, fmt.Errorf("")) {
// This will work!
}
```

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// Package errwrap implements methods to formalize error wrapping in Go.
//
// All of the top-level functions that take an `error` are built to be able
// to take any error, not just wrapped errors. This allows you to use errwrap
// without having to type-check and type-cast everywhere.
package errwrap
import (
"errors"
"reflect"
"strings"
)
// WalkFunc is the callback called for Walk.
type WalkFunc func(error)
// Wrapper is an interface that can be implemented by custom types to
// have all the Contains, Get, etc. functions in errwrap work.
//
// When Walk reaches a Wrapper, it will call the callback for every
// wrapped error in addition to the wrapper itself. Since all the top-level
// functions in errwrap use Walk, this means that all those functions work
// with your custom type.
type Wrapper interface {
WrappedErrors() []error
}
// Wrap defines that outer wraps inner, returning an error type that
// can be cleanly used with the other methods in this package, such as
// Contains, GetAll, etc.
//
// This function won't modify the error message at all (the outer message
// will be used).
func Wrap(outer, inner error) error {
return &wrappedError{
Outer: outer,
Inner: inner,
}
}
// Wrapf wraps an error with a formatting message. This is similar to using
// `fmt.Errorf` to wrap an error. If you're using `fmt.Errorf` to wrap
// errors, you should replace it with this.
//
// format is the format of the error message. The string '{{err}}' will
// be replaced with the original error message.
func Wrapf(format string, err error) error {
outerMsg := "<nil>"
if err != nil {
outerMsg = err.Error()
}
outer := errors.New(strings.Replace(
format, "{{err}}", outerMsg, -1))
return Wrap(outer, err)
}
// Contains checks if the given error contains an error with the
// message msg. If err is not a wrapped error, this will always return
// false unless the error itself happens to match this msg.
func Contains(err error, msg string) bool {
return len(GetAll(err, msg)) > 0
}
// ContainsType checks if the given error contains an error with
// the same concrete type as v. If err is not a wrapped error, this will
// check the err itself.
func ContainsType(err error, v interface{}) bool {
return len(GetAllType(err, v)) > 0
}
// Get is the same as GetAll but returns the deepest matching error.
func Get(err error, msg string) error {
es := GetAll(err, msg)
if len(es) > 0 {
return es[len(es)-1]
}
return nil
}
// GetType is the same as GetAllType but returns the deepest matching error.
func GetType(err error, v interface{}) error {
es := GetAllType(err, v)
if len(es) > 0 {
return es[len(es)-1]
}
return nil
}
// GetAll gets all the errors that might be wrapped in err with the
// given message. The order of the errors is such that the outermost
// matching error (the most recent wrap) is index zero, and so on.
func GetAll(err error, msg string) []error {
var result []error
Walk(err, func(err error) {
if err.Error() == msg {
result = append(result, err)
}
})
return result
}
// GetAllType gets all the errors that are the same type as v.
//
// The order of the return value is the same as described in GetAll.
func GetAllType(err error, v interface{}) []error {
var result []error
var search string
if v != nil {
search = reflect.TypeOf(v).String()
}
Walk(err, func(err error) {
var needle string
if err != nil {
needle = reflect.TypeOf(err).String()
}
if needle == search {
result = append(result, err)
}
})
return result
}
// Walk walks all the wrapped errors in err and calls the callback. If
// err isn't a wrapped error, this will be called once for err. If err
// is a wrapped error, the callback will be called for both the wrapper
// that implements error as well as the wrapped error itself.
func Walk(err error, cb WalkFunc) {
if err == nil {
return
}
switch e := err.(type) {
case *wrappedError:
cb(e.Outer)
Walk(e.Inner, cb)
case Wrapper:
cb(err)
for _, err := range e.WrappedErrors() {
Walk(err, cb)
}
default:
cb(err)
}
}
// wrappedError is an implementation of error that has both the
// outer and inner errors.
type wrappedError struct {
Outer error
Inner error
}
func (w *wrappedError) Error() string {
return w.Outer.Error()
}
func (w *wrappedError) WrappedErrors() []error {
return []error{w.Outer, w.Inner}
}

12
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@ -0,0 +1,12 @@
sudo: false
language: go
go:
- 1.x
branches:
only:
- master
script: env GO111MODULE=on make test testrace

353
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@ -0,0 +1,353 @@
Mozilla Public License, version 2.0
1. Definitions
1.1. “Contributor”
means each individual or legal entity that creates, contributes to the
creation of, or owns Covered Software.
1.2. “Contributor Version”
means the combination of the Contributions of others (if any) used by a
Contributor and that particular Contributor’s Contribution.
1.3. “Contribution”
means Covered Software of a particular Contributor.
1.4. “Covered Software”
means Source Code Form to which the initial Contributor has attached the
notice in Exhibit A, the Executable Form of such Source Code Form, and
Modifications of such Source Code Form, in each case including portions
thereof.
1.5. “Incompatible With Secondary Licenses”
means
a. that the initial Contributor has attached the notice described in
Exhibit B to the Covered Software; or
b. that the Covered Software was made available under the terms of version
1.1 or earlier of the License, but not also under the terms of a
Secondary License.
1.6. “Executable Form”
means any form of the work other than Source Code Form.
1.7. “Larger Work”
means a work that combines Covered Software with other material, in a separate
file or files, that is not Covered Software.
1.8. “License”
means this document.
1.9. “Licensable”
means having the right to grant, to the maximum extent possible, whether at the
time of the initial grant or subsequently, any and all of the rights conveyed by
this License.
1.10. “Modifications”
means any of the following:
a. any file in Source Code Form that results from an addition to, deletion
from, or modification of the contents of Covered Software; or
b. any new file in Source Code Form that contains any Covered Software.
1.11. “Patent Claims” of a Contributor
means any patent claim(s), including without limitation, method, process,
and apparatus claims, in any patent Licensable by such Contributor that
would be infringed, but for the grant of the License, by the making,
using, selling, offering for sale, having made, import, or transfer of
either its Contributions or its Contributor Version.
1.12. “Secondary License”
means either the GNU General Public License, Version 2.0, the GNU Lesser
General Public License, Version 2.1, the GNU Affero General Public
License, Version 3.0, or any later versions of those licenses.
1.13. “Source Code Form”
means the form of the work preferred for making modifications.
1.14. “You” (or “Your”)
means an individual or a legal entity exercising rights under this
License. For legal entities, “You” includes any entity that controls, is
controlled by, or is under common control with You. For purposes of this
definition, “control” means (a) the power, direct or indirect, to cause
the direction or management of such entity, whether by contract or
otherwise, or (b) ownership of more than fifty percent (50%) of the
outstanding shares or beneficial ownership of such entity.
2. License Grants and Conditions
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
a. under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or as
part of a Larger Work; and
b. under Patent Claims of such Contributor to make, use, sell, offer for
sale, have made, import, and otherwise transfer either its Contributions
or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution become
effective for each Contribution on the date the Contributor first distributes
such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under this
License. No additional rights or licenses will be implied from the distribution
or licensing of Covered Software under this License. Notwithstanding Section
2.1(b) above, no patent license is granted by a Contributor:
a. for any code that a Contributor has removed from Covered Software; or
b. for infringements caused by: (i) Your and any other third party’s
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
c. under Patent Claims infringed by Covered Software in the absence of its
Contributions.
This License does not grant any rights in the trademarks, service marks, or
logos of any Contributor (except as may be necessary to comply with the
notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this License
(see Section 10.2) or under the terms of a Secondary License (if permitted
under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its Contributions
are its original creation(s) or it has sufficient rights to grant the
rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under applicable
copyright doctrines of fair use, fair dealing, or other equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
Section 2.1.
3. Responsibilities
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under the
terms of this License. You must inform recipients that the Source Code Form
of the Covered Software is governed by the terms of this License, and how
they can obtain a copy of this License. You may not attempt to alter or
restrict the recipients’ rights in the Source Code Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
a. such Covered Software must also be made available in Source Code Form,
as described in Section 3.1, and You must inform recipients of the
Executable Form how they can obtain a copy of such Source Code Form by
reasonable means in a timely manner, at a charge no more than the cost
of distribution to the recipient; and
b. You may distribute such Executable Form under the terms of this License,
or sublicense it under different terms, provided that the license for
the Executable Form does not attempt to limit or alter the recipients’
rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for the
Covered Software. If the Larger Work is a combination of Covered Software
with a work governed by one or more Secondary Licenses, and the Covered
Software is not Incompatible With Secondary Licenses, this License permits
You to additionally distribute such Covered Software under the terms of
such Secondary License(s), so that the recipient of the Larger Work may, at
their option, further distribute the Covered Software under the terms of
either this License or such Secondary License(s).
3.4. Notices
You may not remove or alter the substance of any license notices (including
copyright notices, patent notices, disclaimers of warranty, or limitations
of liability) contained within the Source Code Form of the Covered
Software, except that You may alter any license notices to the extent
required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on behalf
of any Contributor. You must make it absolutely clear that any such
warranty, support, indemnity, or liability obligation is offered by You
alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
If it is impossible for You to comply with any of the terms of this License
with respect to some or all of the Covered Software due to statute, judicial
order, or regulation then You must: (a) comply with the terms of this License
to the maximum extent possible; and (b) describe the limitations and the code
they affect. Such description must be placed in a text file included with all
distributions of the Covered Software under this License. Except to the
extent prohibited by statute or regulation, such description must be
sufficiently detailed for a recipient of ordinary skill to be able to
understand it.
5. Termination
5.1. The rights granted under this License will terminate automatically if You
fail to comply with any of its terms. However, if You become compliant,
then the rights granted under this License from a particular Contributor
are reinstated (a) provisionally, unless and until such Contributor
explicitly and finally terminates Your grants, and (b) on an ongoing basis,
if such Contributor fails to notify You of the non-compliance by some
reasonable means prior to 60 days after You have come back into compliance.
Moreover, Your grants from a particular Contributor are reinstated on an
ongoing basis if such Contributor notifies You of the non-compliance by
some reasonable means, this is the first time You have received notice of
non-compliance with this License from such Contributor, and You become
compliant prior to 30 days after Your receipt of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions, counter-claims,
and cross-claims) alleging that a Contributor Version directly or
indirectly infringes any patent, then the rights granted to You by any and
all Contributors for the Covered Software under Section 2.1 of this License
shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
license agreements (excluding distributors and resellers) which have been
validly granted by You or Your distributors under this License prior to
termination shall survive termination.
6. Disclaimer of Warranty
Covered Software is provided under this License on an “as is” basis, without
warranty of any kind, either expressed, implied, or statutory, including,
without limitation, warranties that the Covered Software is free of defects,
merchantable, fit for a particular purpose or non-infringing. The entire
risk as to the quality and performance of the Covered Software is with You.
Should any Covered Software prove defective in any respect, You (not any
Contributor) assume the cost of any necessary servicing, repair, or
correction. This disclaimer of warranty constitutes an essential part of this
License. No use of any Covered Software is authorized under this License
except under this disclaimer.
7. Limitation of Liability
Under no circumstances and under no legal theory, whether tort (including
negligence), contract, or otherwise, shall any Contributor, or anyone who
distributes Covered Software as permitted above, be liable to You for any
direct, indirect, special, incidental, or consequential damages of any
character including, without limitation, damages for lost profits, loss of
goodwill, work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses, even if such party shall have been
informed of the possibility of such damages. This limitation of liability
shall not apply to liability for death or personal injury resulting from such
party’s negligence to the extent applicable law prohibits such limitation.
Some jurisdictions do not allow the exclusion or limitation of incidental or
consequential damages, so this exclusion and limitation may not apply to You.
8. Litigation
Any litigation relating to this License may be brought only in the courts of
a jurisdiction where the defendant maintains its principal place of business
and such litigation shall be governed by laws of that jurisdiction, without
reference to its conflict-of-law provisions. Nothing in this Section shall
prevent a party’s ability to bring cross-claims or counter-claims.
9. Miscellaneous
This License represents the complete agreement concerning the subject matter
hereof. If any provision of this License is held to be unenforceable, such
provision shall be reformed only to the extent necessary to make it
enforceable. Any law or regulation which provides that the language of a
contract shall be construed against the drafter shall not be used to construe
this License against a Contributor.
10. Versions of the License
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version of
the License under which You originally received the Covered Software, or
under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a modified
version of this License if you rename the license and remove any
references to the name of the license steward (except to note that such
modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary Licenses
If You choose to distribute Source Code Form that is Incompatible With
Secondary Licenses under the terms of this version of the License, the
notice described in Exhibit B of this License must be attached.
Exhibit A - Source Code Form License Notice
This Source Code Form is subject to the
terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not
distributed with this file, You can
obtain one at
http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular file, then
You may include the notice in a location (such as a LICENSE file in a relevant
directory) where a recipient would be likely to look for such a notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - “Incompatible With Secondary Licenses” Notice
This Source Code Form is “Incompatible
With Secondary Licenses”, as defined by
the Mozilla Public License, v. 2.0.

31
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TEST?=./...
default: test
# test runs the test suite and vets the code.
test: generate
@echo "==> Running tests..."
@go list $(TEST) \
| grep -v "/vendor/" \
| xargs -n1 go test -timeout=60s -parallel=10 ${TESTARGS}
# testrace runs the race checker
testrace: generate
@echo "==> Running tests (race)..."
@go list $(TEST) \
| grep -v "/vendor/" \
| xargs -n1 go test -timeout=60s -race ${TESTARGS}
# updatedeps installs all the dependencies needed to run and build.
updatedeps:
@sh -c "'${CURDIR}/scripts/deps.sh' '${NAME}'"
# generate runs `go generate` to build the dynamically generated source files.
generate:
@echo "==> Generating..."
@find . -type f -name '.DS_Store' -delete
@go list ./... \
| grep -v "/vendor/" \
| xargs -n1 go generate
.PHONY: default test testrace updatedeps generate

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# go-multierror
[![Build Status](http://img.shields.io/travis/hashicorp/go-multierror.svg?style=flat-square)][travis]
[![Go Documentation](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)][godocs]
[travis]: https://travis-ci.org/hashicorp/go-multierror
[godocs]: https://godoc.org/github.com/hashicorp/go-multierror
`go-multierror` is a package for Go that provides a mechanism for
representing a list of `error` values as a single `error`.
This allows a function in Go to return an `error` that might actually
be a list of errors. If the caller knows this, they can unwrap the
list and access the errors. If the caller doesn't know, the error
formats to a nice human-readable format.
`go-multierror` is fully compatible with the Go standard library
[errors](https://golang.org/pkg/errors/) package, including the
functions `As`, `Is`, and `Unwrap`. This provides a standardized approach
for introspecting on error values.
## Installation and Docs
Install using `go get github.com/hashicorp/go-multierror`.
Full documentation is available at
http://godoc.org/github.com/hashicorp/go-multierror
## Usage
go-multierror is easy to use and purposely built to be unobtrusive in
existing Go applications/libraries that may not be aware of it.
**Building a list of errors**
The `Append` function is used to create a list of errors. This function
behaves a lot like the Go built-in `append` function: it doesn't matter
if the first argument is nil, a `multierror.Error`, or any other `error`,
the function behaves as you would expect.
```go
var result error
if err := step1(); err != nil {
result = multierror.Append(result, err)
}
if err := step2(); err != nil {
result = multierror.Append(result, err)
}
return result
```
**Customizing the formatting of the errors**
By specifying a custom `ErrorFormat`, you can customize the format
of the `Error() string` function:
```go
var result *multierror.Error
// ... accumulate errors here, maybe using Append
if result != nil {
result.ErrorFormat = func([]error) string {
return "errors!"
}
}
```
**Accessing the list of errors**
`multierror.Error` implements `error` so if the caller doesn't know about
multierror, it will work just fine. But if you're aware a multierror might
be returned, you can use type switches to access the list of errors:
```go
if err := something(); err != nil {
if merr, ok := err.(*multierror.Error); ok {
// Use merr.Errors
}
}
```
You can also use the standard [`errors.Unwrap`](https://golang.org/pkg/errors/#Unwrap)
function. This will continue to unwrap into subsequent errors until none exist.
**Extracting an error**
The standard library [`errors.As`](https://golang.org/pkg/errors/#As)
function can be used directly with a multierror to extract a specific error:
```go
// Assume err is a multierror value
err := somefunc()
// We want to know if "err" has a "RichErrorType" in it and extract it.
var errRich RichErrorType
if errors.As(err, &errRich) {
// It has it, and now errRich is populated.
}
```
**Checking for an exact error value**
Some errors are returned as exact errors such as the [`ErrNotExist`](https://golang.org/pkg/os/#pkg-variables)
error in the `os` package. You can check if this error is present by using
the standard [`errors.Is`](https://golang.org/pkg/errors/#Is) function.
```go
// Assume err is a multierror value
err := somefunc()
if errors.Is(err, os.ErrNotExist) {
// err contains os.ErrNotExist
}
```
**Returning a multierror only if there are errors**
If you build a `multierror.Error`, you can use the `ErrorOrNil` function
to return an `error` implementation only if there are errors to return:
```go
var result *multierror.Error
// ... accumulate errors here
// Return the `error` only if errors were added to the multierror, otherwise
// return nil since there are no errors.
return result.ErrorOrNil()
```

41
vendor/github.com/hashicorp/go-multierror/append.go generated vendored Normal file
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package multierror
// Append is a helper function that will append more errors
// onto an Error in order to create a larger multi-error.
//
// If err is not a multierror.Error, then it will be turned into
// one. If any of the errs are multierr.Error, they will be flattened
// one level into err.
func Append(err error, errs ...error) *Error {
switch err := err.(type) {
case *Error:
// Typed nils can reach here, so initialize if we are nil
if err == nil {
err = new(Error)
}
// Go through each error and flatten
for _, e := range errs {
switch e := e.(type) {
case *Error:
if e != nil {
err.Errors = append(err.Errors, e.Errors...)
}
default:
if e != nil {
err.Errors = append(err.Errors, e)
}
}
}
return err
default:
newErrs := make([]error, 0, len(errs)+1)
if err != nil {
newErrs = append(newErrs, err)
}
newErrs = append(newErrs, errs...)
return Append(&Error{}, newErrs...)
}
}

26
vendor/github.com/hashicorp/go-multierror/flatten.go generated vendored Normal file
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package multierror
// Flatten flattens the given error, merging any *Errors together into
// a single *Error.
func Flatten(err error) error {
// If it isn't an *Error, just return the error as-is
if _, ok := err.(*Error); !ok {
return err
}
// Otherwise, make the result and flatten away!
flatErr := new(Error)
flatten(err, flatErr)
return flatErr
}
func flatten(err error, flatErr *Error) {
switch err := err.(type) {
case *Error:
for _, e := range err.Errors {
flatten(e, flatErr)
}
default:
flatErr.Errors = append(flatErr.Errors, err)
}
}

27
vendor/github.com/hashicorp/go-multierror/format.go generated vendored Normal file
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package multierror
import (
"fmt"
"strings"
)
// ErrorFormatFunc is a function callback that is called by Error to
// turn the list of errors into a string.
type ErrorFormatFunc func([]error) string
// ListFormatFunc is a basic formatter that outputs the number of errors
// that occurred along with a bullet point list of the errors.
func ListFormatFunc(es []error) string {
if len(es) == 1 {
return fmt.Sprintf("1 error occurred:\n\t* %s\n\n", es[0])
}
points := make([]string, len(es))
for i, err := range es {
points[i] = fmt.Sprintf("* %s", err)
}
return fmt.Sprintf(
"%d errors occurred:\n\t%s\n\n",
len(es), strings.Join(points, "\n\t"))
}

38
vendor/github.com/hashicorp/go-multierror/group.go generated vendored Normal file
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package multierror
import "sync"
// Group is a collection of goroutines which return errors that need to be
// coalesced.
type Group struct {
mutex sync.Mutex
err *Error
wg sync.WaitGroup
}
// Go calls the given function in a new goroutine.
//
// If the function returns an error it is added to the group multierror which
// is returned by Wait.
func (g *Group) Go(f func() error) {
g.wg.Add(1)
go func() {
defer g.wg.Done()
if err := f(); err != nil {
g.mutex.Lock()
g.err = Append(g.err, err)
g.mutex.Unlock()
}
}()
}
// Wait blocks until all function calls from the Go method have returned, then
// returns the multierror.
func (g *Group) Wait() *Error {
g.wg.Wait()
g.mutex.Lock()
defer g.mutex.Unlock()
return g.err
}

118
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package multierror
import (
"errors"
"fmt"
)
// Error is an error type to track multiple errors. This is used to
// accumulate errors in cases and return them as a single "error".
type Error struct {
Errors []error
ErrorFormat ErrorFormatFunc
}
func (e *Error) Error() string {
fn := e.ErrorFormat
if fn == nil {
fn = ListFormatFunc
}
return fn(e.Errors)
}
// ErrorOrNil returns an error interface if this Error represents
// a list of errors, or returns nil if the list of errors is empty. This
// function is useful at the end of accumulation to make sure that the value
// returned represents the existence of errors.
func (e *Error) ErrorOrNil() error {
if e == nil {
return nil
}
if len(e.Errors) == 0 {
return nil
}
return e
}
func (e *Error) GoString() string {
return fmt.Sprintf("*%#v", *e)
}
// WrappedErrors returns the list of errors that this Error is wrapping.
// It is an implementation of the errwrap.Wrapper interface so that
// multierror.Error can be used with that library.
//
// This method is not safe to be called concurrently and is no different
// than accessing the Errors field directly. It is implemented only to
// satisfy the errwrap.Wrapper interface.
func (e *Error) WrappedErrors() []error {
return e.Errors
}
// Unwrap returns an error from Error (or nil if there are no errors).
// This error returned will further support Unwrap to get the next error,
// etc. The order will match the order of Errors in the multierror.Error
// at the time of calling.
//
// The resulting error supports errors.As/Is/Unwrap so you can continue
// to use the stdlib errors package to introspect further.
//
// This will perform a shallow copy of the errors slice. Any errors appended
// to this error after calling Unwrap will not be available until a new
// Unwrap is called on the multierror.Error.
func (e *Error) Unwrap() error {
// If we have no errors then we do nothing
if e == nil || len(e.Errors) == 0 {
return nil
}
// If we have exactly one error, we can just return that directly.
if len(e.Errors) == 1 {
return e.Errors[0]
}
// Shallow copy the slice
errs := make([]error, len(e.Errors))
copy(errs, e.Errors)
return chain(errs)
}
// chain implements the interfaces necessary for errors.Is/As/Unwrap to
// work in a deterministic way with multierror. A chain tracks a list of
// errors while accounting for the current represented error. This lets
// Is/As be meaningful.
//
// Unwrap returns the next error. In the cleanest form, Unwrap would return
// the wrapped error here but we can't do that if we want to properly
// get access to all the errors. Instead, users are recommended to use
// Is/As to get the correct error type out.
//
// Precondition: []error is non-empty (len > 0)
type chain []error
// Error implements the error interface
func (e chain) Error() string {
return e[0].Error()
}
// Unwrap implements errors.Unwrap by returning the next error in the
// chain or nil if there are no more errors.
func (e chain) Unwrap() error {
if len(e) == 1 {
return nil
}
return e[1:]
}
// As implements errors.As by attempting to map to the current value.
func (e chain) As(target interface{}) bool {
return errors.As(e[0], target)
}
// Is implements errors.Is by comparing the current value directly.
func (e chain) Is(target error) bool {
return errors.Is(e[0], target)
}

37
vendor/github.com/hashicorp/go-multierror/prefix.go generated vendored Normal file
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package multierror
import (
"fmt"
"github.com/hashicorp/errwrap"
)
// Prefix is a helper function that will prefix some text
// to the given error. If the error is a multierror.Error, then
// it will be prefixed to each wrapped error.
//
// This is useful to use when appending multiple multierrors
// together in order to give better scoping.
func Prefix(err error, prefix string) error {
if err == nil {
return nil
}
format := fmt.Sprintf("%s {{err}}", prefix)
switch err := err.(type) {
case *Error:
// Typed nils can reach here, so initialize if we are nil
if err == nil {
err = new(Error)
}
// Wrap each of the errors
for i, e := range err.Errors {
err.Errors[i] = errwrap.Wrapf(format, e)
}
return err
default:
return errwrap.Wrapf(format, err)
}
}

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@ -0,0 +1,16 @@
package multierror
// Len implements sort.Interface function for length
func (err Error) Len() int {
return len(err.Errors)
}
// Swap implements sort.Interface function for swapping elements
func (err Error) Swap(i, j int) {
err.Errors[i], err.Errors[j] = err.Errors[j], err.Errors[i]
}
// Less implements sort.Interface function for determining order
func (err Error) Less(i, j int) bool {
return err.Errors[i].Error() < err.Errors[j].Error()
}

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# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
tmp
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe
*.test
*.prof

1
vendor/github.com/rs/zerolog/CNAME generated vendored Normal file
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@ -0,0 +1 @@
zerolog.io

21
vendor/github.com/rs/zerolog/LICENSE generated vendored Normal file
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@ -0,0 +1,21 @@
MIT License
Copyright (c) 2017 Olivier Poitrey
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

695
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# Zero Allocation JSON Logger
[![godoc](http://img.shields.io/badge/godoc-reference-blue.svg?style=flat)](https://godoc.org/github.com/rs/zerolog) [![license](http://img.shields.io/badge/license-MIT-red.svg?style=flat)](https://raw.githubusercontent.com/rs/zerolog/master/LICENSE) [![Build Status](https://travis-ci.org/rs/zerolog.svg?branch=master)](https://travis-ci.org/rs/zerolog) [![Coverage](http://gocover.io/_badge/github.com/rs/zerolog)](http://gocover.io/github.com/rs/zerolog)
The zerolog package provides a fast and simple logger dedicated to JSON output.
Zerolog's API is designed to provide both a great developer experience and stunning [performance](#benchmarks). Its unique chaining API allows zerolog to write JSON (or CBOR) log events by avoiding allocations and reflection.
Uber's [zap](https://godoc.org/go.uber.org/zap) library pioneered this approach. Zerolog is taking this concept to the next level with a simpler to use API and even better performance.
To keep the code base and the API simple, zerolog focuses on efficient structured logging only. Pretty logging on the console is made possible using the provided (but inefficient) [`zerolog.ConsoleWriter`](#pretty-logging).
![Pretty Logging Image](pretty.png)
## Who uses zerolog
Find out [who uses zerolog](https://github.com/rs/zerolog/wiki/Who-uses-zerolog) and add your company / project to the list.
## Features
* [Blazing fast](#benchmarks)
* [Low to zero allocation](#benchmarks)
* [Leveled logging](#leveled-logging)
* [Sampling](#log-sampling)
* [Hooks](#hooks)
* [Contextual fields](#contextual-logging)
* `context.Context` integration
* [Integration with `net/http`](#integration-with-nethttp)
* [JSON and CBOR encoding formats](#binary-encoding)
* [Pretty logging for development](#pretty-logging)
* [Error Logging (with optional Stacktrace)](#error-logging)
## Installation
```bash
go get -u github.com/rs/zerolog/log
```
## Getting Started
### Simple Logging Example
For simple logging, import the global logger package **github.com/rs/zerolog/log**
```go
package main
import (
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)
func main() {
// UNIX Time is faster and smaller than most timestamps
zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
log.Print("hello world")
}
// Output: {"time":1516134303,"level":"debug","message":"hello world"}
```
> Note: By default log writes to `os.Stderr`
> Note: The default log level for `log.Print` is *debug*
### Contextual Logging
**zerolog** allows data to be added to log messages in the form of key:value pairs. The data added to the message adds "context" about the log event that can be critical for debugging as well as myriad other purposes. An example of this is below:
```go
package main
import (
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)
func main() {
zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
log.Debug().
Str("Scale", "833 cents").
Float64("Interval", 833.09).
Msg("Fibonacci is everywhere")
log.Debug().
Str("Name", "Tom").
Send()
}
// Output: {"level":"debug","Scale":"833 cents","Interval":833.09,"time":1562212768,"message":"Fibonacci is everywhere"}
// Output: {"level":"debug","Name":"Tom","time":1562212768}
```
> You'll note in the above example that when adding contextual fields, the fields are strongly typed. You can find the full list of supported fields [here](#standard-types)
### Leveled Logging
#### Simple Leveled Logging Example
```go
package main
import (
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)
func main() {
zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
log.Info().Msg("hello world")
}
// Output: {"time":1516134303,"level":"info","message":"hello world"}
```
> It is very important to note that when using the **zerolog** chaining API, as shown above (`log.Info().Msg("hello world"`), the chain must have either the `Msg` or `Msgf` method call. If you forget to add either of these, the log will not occur and there is no compile time error to alert you of this.
**zerolog** allows for logging at the following levels (from highest to lowest):
* panic (`zerolog.PanicLevel`, 5)
* fatal (`zerolog.FatalLevel`, 4)
* error (`zerolog.ErrorLevel`, 3)
* warn (`zerolog.WarnLevel`, 2)
* info (`zerolog.InfoLevel`, 1)
* debug (`zerolog.DebugLevel`, 0)
* trace (`zerolog.TraceLevel`, -1)
You can set the Global logging level to any of these options using the `SetGlobalLevel` function in the zerolog package, passing in one of the given constants above, e.g. `zerolog.InfoLevel` would be the "info" level. Whichever level is chosen, all logs with a level greater than or equal to that level will be written. To turn off logging entirely, pass the `zerolog.Disabled` constant.
#### Setting Global Log Level
This example uses command-line flags to demonstrate various outputs depending on the chosen log level.
```go
package main
import (
"flag"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)
func main() {
zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
debug := flag.Bool("debug", false, "sets log level to debug")
flag.Parse()
// Default level for this example is info, unless debug flag is present
zerolog.SetGlobalLevel(zerolog.InfoLevel)
if *debug {
zerolog.SetGlobalLevel(zerolog.DebugLevel)
}
log.Debug().Msg("This message appears only when log level set to Debug")
log.Info().Msg("This message appears when log level set to Debug or Info")
if e := log.Debug(); e.Enabled() {
// Compute log output only if enabled.
value := "bar"
e.Str("foo", value).Msg("some debug message")
}
}
```
Info Output (no flag)
```bash
$ ./logLevelExample
{"time":1516387492,"level":"info","message":"This message appears when log level set to Debug or Info"}
```
Debug Output (debug flag set)
```bash
$ ./logLevelExample -debug
{"time":1516387573,"level":"debug","message":"This message appears only when log level set to Debug"}
{"time":1516387573,"level":"info","message":"This message appears when log level set to Debug or Info"}
{"time":1516387573,"level":"debug","foo":"bar","message":"some debug message"}
```
#### Logging without Level or Message
You may choose to log without a specific level by using the `Log` method. You may also write without a message by setting an empty string in the `msg string` parameter of the `Msg` method. Both are demonstrated in the example below.
```go
package main
import (
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)
func main() {
zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
log.Log().
Str("foo", "bar").
Msg("")
}
// Output: {"time":1494567715,"foo":"bar"}
```
### Error Logging
You can log errors using the `Err` method
```go
package main
import (
"errors"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)
func main() {
zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
err := errors.New("seems we have an error here")
log.Error().Err(err).Msg("")
}
// Output: {"level":"error","error":"seems we have an error here","time":1609085256}
```
> The default field name for errors is `error`, you can change this by setting `zerolog.ErrorFieldName` to meet your needs.
#### Error Logging with Stacktrace
Using `github.com/pkg/errors`, you can add a formatted stacktrace to your errors.
```go
package main
import (
"github.com/pkg/errors"
"github.com/rs/zerolog/pkgerrors"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)
func main() {
zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
zerolog.ErrorStackMarshaler = pkgerrors.MarshalStack
err := outer()
log.Error().Stack().Err(err).Msg("")
}
func inner() error {
return errors.New("seems we have an error here")
}
func middle() error {
err := inner()
if err != nil {
return err
}
return nil
}
func outer() error {
err := middle()
if err != nil {
return err
}
return nil
}
// Output: {"level":"error","stack":[{"func":"inner","line":"20","source":"errors.go"},{"func":"middle","line":"24","source":"errors.go"},{"func":"outer","line":"32","source":"errors.go"},{"func":"main","line":"15","source":"errors.go"},{"func":"main","line":"204","source":"proc.go"},{"func":"goexit","line":"1374","source":"asm_amd64.s"}],"error":"seems we have an error here","time":1609086683}
```
> zerolog.ErrorStackMarshaler must be set in order for the stack to output anything.
#### Logging Fatal Messages
```go
package main
import (
"errors"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)
func main() {
err := errors.New("A repo man spends his life getting into tense situations")
service := "myservice"
zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
log.Fatal().
Err(err).
Str("service", service).
Msgf("Cannot start %s", service)
}
// Output: {"time":1516133263,"level":"fatal","error":"A repo man spends his life getting into tense situations","service":"myservice","message":"Cannot start myservice"}
// exit status 1
```
> NOTE: Using `Msgf` generates one allocation even when the logger is disabled.
### Create logger instance to manage different outputs
```go
logger := zerolog.New(os.Stderr).With().Timestamp().Logger()
logger.Info().Str("foo", "bar").Msg("hello world")
// Output: {"level":"info","time":1494567715,"message":"hello world","foo":"bar"}
```
### Sub-loggers let you chain loggers with additional context
```go
sublogger := log.With().
Str("component", "foo").
Logger()
sublogger.Info().Msg("hello world")
// Output: {"level":"info","time":1494567715,"message":"hello world","component":"foo"}
```
### Pretty logging
To log a human-friendly, colorized output, use `zerolog.ConsoleWriter`:
```go
log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stderr})
log.Info().Str("foo", "bar").Msg("Hello world")
// Output: 3:04PM INF Hello World foo=bar
```
To customize the configuration and formatting:
```go
output := zerolog.ConsoleWriter{Out: os.Stdout, TimeFormat: time.RFC3339}
output.FormatLevel = func(i interface{}) string {
return strings.ToUpper(fmt.Sprintf("| %-6s|", i))
}
output.FormatMessage = func(i interface{}) string {
return fmt.Sprintf("***%s****", i)
}
output.FormatFieldName = func(i interface{}) string {
return fmt.Sprintf("%s:", i)
}
output.FormatFieldValue = func(i interface{}) string {
return strings.ToUpper(fmt.Sprintf("%s", i))
}
log := zerolog.New(output).With().Timestamp().Logger()
log.Info().Str("foo", "bar").Msg("Hello World")
// Output: 2006-01-02T15:04:05Z07:00 | INFO | ***Hello World**** foo:BAR
```
### Sub dictionary
```go
log.Info().
Str("foo", "bar").
Dict("dict", zerolog.Dict().
Str("bar", "baz").
Int("n", 1),
).Msg("hello world")
// Output: {"level":"info","time":1494567715,"foo":"bar","dict":{"bar":"baz","n":1},"message":"hello world"}
```
### Customize automatic field names
```go
zerolog.TimestampFieldName = "t"
zerolog.LevelFieldName = "l"
zerolog.MessageFieldName = "m"
log.Info().Msg("hello world")
// Output: {"l":"info","t":1494567715,"m":"hello world"}
```
### Add contextual fields to the global logger
```go
log.Logger = log.With().Str("foo", "bar").Logger()
```
### Add file and line number to log
```go
log.Logger = log.With().Caller().Logger()
log.Info().Msg("hello world")
// Output: {"level": "info", "message": "hello world", "caller": "/go/src/your_project/some_file:21"}
```
### Thread-safe, lock-free, non-blocking writer
If your writer might be slow or not thread-safe and you need your log producers to never get slowed down by a slow writer, you can use a `diode.Writer` as follow:
```go
wr := diode.NewWriter(os.Stdout, 1000, 10*time.Millisecond, func(missed int) {
fmt.Printf("Logger Dropped %d messages", missed)
})
log := zerolog.New(wr)
log.Print("test")
```
You will need to install `code.cloudfoundry.org/go-diodes` to use this feature.
### Log Sampling
```go
sampled := log.Sample(&zerolog.BasicSampler{N: 10})
sampled.Info().Msg("will be logged every 10 messages")
// Output: {"time":1494567715,"level":"info","message":"will be logged every 10 messages"}
```
More advanced sampling:
```go
// Will let 5 debug messages per period of 1 second.
// Over 5 debug message, 1 every 100 debug messages are logged.
// Other levels are not sampled.
sampled := log.Sample(zerolog.LevelSampler{
DebugSampler: &zerolog.BurstSampler{
Burst: 5,
Period: 1*time.Second,
NextSampler: &zerolog.BasicSampler{N: 100},
},
})
sampled.Debug().Msg("hello world")
// Output: {"time":1494567715,"level":"debug","message":"hello world"}
```
### Hooks
```go
type SeverityHook struct{}
func (h SeverityHook) Run(e *zerolog.Event, level zerolog.Level, msg string) {
if level != zerolog.NoLevel {
e.Str("severity", level.String())
}
}
hooked := log.Hook(SeverityHook{})
hooked.Warn().Msg("")
// Output: {"level":"warn","severity":"warn"}
```
### Pass a sub-logger by context
```go
ctx := log.With().Str("component", "module").Logger().WithContext(ctx)
log.Ctx(ctx).Info().Msg("hello world")
// Output: {"component":"module","level":"info","message":"hello world"}
```
### Set as standard logger output
```go
log := zerolog.New(os.Stdout).With().
Str("foo", "bar").
Logger()
stdlog.SetFlags(0)
stdlog.SetOutput(log)
stdlog.Print("hello world")
// Output: {"foo":"bar","message":"hello world"}
```
### Integration with `net/http`
The `github.com/rs/zerolog/hlog` package provides some helpers to integrate zerolog with `http.Handler`.
In this example we use [alice](https://github.com/justinas/alice) to install logger for better readability.
```go
log := zerolog.New(os.Stdout).With().
Timestamp().
Str("role", "my-service").
Str("host", host).
Logger()
c := alice.New()
// Install the logger handler with default output on the console
c = c.Append(hlog.NewHandler(log))
// Install some provided extra handler to set some request's context fields.
// Thanks to that handler, all our logs will come with some prepopulated fields.
c = c.Append(hlog.AccessHandler(func(r *http.Request, status, size int, duration time.Duration) {
hlog.FromRequest(r).Info().
Str("method", r.Method).
Stringer("url", r.URL).
Int("status", status).
Int("size", size).
Dur("duration", duration).
Msg("")
}))
c = c.Append(hlog.RemoteAddrHandler("ip"))
c = c.Append(hlog.UserAgentHandler("user_agent"))
c = c.Append(hlog.RefererHandler("referer"))
c = c.Append(hlog.RequestIDHandler("req_id", "Request-Id"))
// Here is your final handler
h := c.Then(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Get the logger from the request's context. You can safely assume it
// will be always there: if the handler is removed, hlog.FromRequest
// will return a no-op logger.
hlog.FromRequest(r).Info().
Str("user", "current user").
Str("status", "ok").
Msg("Something happened")
// Output: {"level":"info","time":"2001-02-03T04:05:06Z","role":"my-service","host":"local-hostname","req_id":"b4g0l5t6tfid6dtrapu0","user":"current user","status":"ok","message":"Something happened"}
}))
http.Handle("/", h)
if err := http.ListenAndServe(":8080", nil); err != nil {
log.Fatal().Err(err).Msg("Startup failed")
}
```
## Multiple Log Output
`zerolog.MultiLevelWriter` may be used to send the log message to multiple outputs.
In this example, we send the log message to both `os.Stdout` and the in-built ConsoleWriter.
```go
func main() {
consoleWriter := zerolog.ConsoleWriter{Out: os.Stdout}
multi := zerolog.MultiLevelWriter(consoleWriter, os.Stdout)
logger := zerolog.New(multi).With().Timestamp().Logger()
logger.Info().Msg("Hello World!")
}
// Output (Line 1: Console; Line 2: Stdout)
// 12:36PM INF Hello World!
// {"level":"info","time":"2019-11-07T12:36:38+03:00","message":"Hello World!"}
```
## Global Settings
Some settings can be changed and will by applied to all loggers:
* `log.Logger`: You can set this value to customize the global logger (the one used by package level methods).
* `zerolog.SetGlobalLevel`: Can raise the minimum level of all loggers. Call this with `zerolog.Disabled` to disable logging altogether (quiet mode).
* `zerolog.DisableSampling`: If argument is `true`, all sampled loggers will stop sampling and issue 100% of their log events.
* `zerolog.TimestampFieldName`: Can be set to customize `Timestamp` field name.
* `zerolog.LevelFieldName`: Can be set to customize level field name.
* `zerolog.MessageFieldName`: Can be set to customize message field name.
* `zerolog.ErrorFieldName`: Can be set to customize `Err` field name.
* `zerolog.TimeFieldFormat`: Can be set to customize `Time` field value formatting. If set with `zerolog.TimeFormatUnix`, `zerolog.TimeFormatUnixMs` or `zerolog.TimeFormatUnixMicro`, times are formated as UNIX timestamp.
* `zerolog.DurationFieldUnit`: Can be set to customize the unit for time.Duration type fields added by `Dur` (default: `time.Millisecond`).
* `zerolog.DurationFieldInteger`: If set to `true`, `Dur` fields are formatted as integers instead of floats (default: `false`).
* `zerolog.ErrorHandler`: Called whenever zerolog fails to write an event on its output. If not set, an error is printed on the stderr. This handler must be thread safe and non-blocking.
## Field Types
### Standard Types
* `Str`
* `Bool`
* `Int`, `Int8`, `Int16`, `Int32`, `Int64`
* `Uint`, `Uint8`, `Uint16`, `Uint32`, `Uint64`
* `Float32`, `Float64`
### Advanced Fields
* `Err`: Takes an `error` and renders it as a string using the `zerolog.ErrorFieldName` field name.
* `Func`: Run a `func` only if the level is enabled.
* `Timestamp`: Inserts a timestamp field with `zerolog.TimestampFieldName` field name, formatted using `zerolog.TimeFieldFormat`.
* `Time`: Adds a field with time formatted with `zerolog.TimeFieldFormat`.
* `Dur`: Adds a field with `time.Duration`.
* `Dict`: Adds a sub-key/value as a field of the event.
* `RawJSON`: Adds a field with an already encoded JSON (`[]byte`)
* `Hex`: Adds a field with value formatted as a hexadecimal string (`[]byte`)
* `Interface`: Uses reflection to marshal the type.
Most fields are also available in the slice format (`Strs` for `[]string`, `Errs` for `[]error` etc.)
## Binary Encoding
In addition to the default JSON encoding, `zerolog` can produce binary logs using [CBOR](http://cbor.io) encoding. The choice of encoding can be decided at compile time using the build tag `binary_log` as follows:
```bash
go build -tags binary_log .
```
To Decode binary encoded log files you can use any CBOR decoder. One has been tested to work
with zerolog library is [CSD](https://github.com/toravir/csd/).
## Related Projects
* [grpc-zerolog](https://github.com/cheapRoc/grpc-zerolog): Implementation of `grpclog.LoggerV2` interface using `zerolog`
* [overlog](https://github.com/Trendyol/overlog): Implementation of `Mapped Diagnostic Context` interface using `zerolog`
* [zerologr](https://github.com/go-logr/zerologr): Implementation of `logr.LogSink` interface using `zerolog`
## Benchmarks
See [logbench](http://hackemist.com/logbench/) for more comprehensive and up-to-date benchmarks.
All operations are allocation free (those numbers *include* JSON encoding):
```text
BenchmarkLogEmpty-8 100000000 19.1 ns/op 0 B/op 0 allocs/op
BenchmarkDisabled-8 500000000 4.07 ns/op 0 B/op 0 allocs/op
BenchmarkInfo-8 30000000 42.5 ns/op 0 B/op 0 allocs/op
BenchmarkContextFields-8 30000000 44.9 ns/op 0 B/op 0 allocs/op
BenchmarkLogFields-8 10000000 184 ns/op 0 B/op 0 allocs/op
```
There are a few Go logging benchmarks and comparisons that include zerolog.
* [imkira/go-loggers-bench](https://github.com/imkira/go-loggers-bench)
* [uber-common/zap](https://github.com/uber-go/zap#performance)
Using Uber's zap comparison benchmark:
Log a message and 10 fields:
| Library | Time | Bytes Allocated | Objects Allocated |
| :--- | :---: | :---: | :---: |
| zerolog | 767 ns/op | 552 B/op | 6 allocs/op |
| :zap: zap | 848 ns/op | 704 B/op | 2 allocs/op |
| :zap: zap (sugared) | 1363 ns/op | 1610 B/op | 20 allocs/op |
| go-kit | 3614 ns/op | 2895 B/op | 66 allocs/op |
| lion | 5392 ns/op | 5807 B/op | 63 allocs/op |
| logrus | 5661 ns/op | 6092 B/op | 78 allocs/op |
| apex/log | 15332 ns/op | 3832 B/op | 65 allocs/op |
| log15 | 20657 ns/op | 5632 B/op | 93 allocs/op |
Log a message with a logger that already has 10 fields of context:
| Library | Time | Bytes Allocated | Objects Allocated |
| :--- | :---: | :---: | :---: |
| zerolog | 52 ns/op | 0 B/op | 0 allocs/op |
| :zap: zap | 283 ns/op | 0 B/op | 0 allocs/op |
| :zap: zap (sugared) | 337 ns/op | 80 B/op | 2 allocs/op |
| lion | 2702 ns/op | 4074 B/op | 38 allocs/op |
| go-kit | 3378 ns/op | 3046 B/op | 52 allocs/op |
| logrus | 4309 ns/op | 4564 B/op | 63 allocs/op |
| apex/log | 13456 ns/op | 2898 B/op | 51 allocs/op |
| log15 | 14179 ns/op | 2642 B/op | 44 allocs/op |
Log a static string, without any context or `printf`-style templating:
| Library | Time | Bytes Allocated | Objects Allocated |
| :--- | :---: | :---: | :---: |
| zerolog | 50 ns/op | 0 B/op | 0 allocs/op |
| :zap: zap | 236 ns/op | 0 B/op | 0 allocs/op |
| standard library | 453 ns/op | 80 B/op | 2 allocs/op |
| :zap: zap (sugared) | 337 ns/op | 80 B/op | 2 allocs/op |
| go-kit | 508 ns/op | 656 B/op | 13 allocs/op |
| lion | 771 ns/op | 1224 B/op | 10 allocs/op |
| logrus | 1244 ns/op | 1505 B/op | 27 allocs/op |
| apex/log | 2751 ns/op | 584 B/op | 11 allocs/op |
| log15 | 5181 ns/op | 1592 B/op | 26 allocs/op |
## Caveats
Note that zerolog does no de-duplication of fields. Using the same key multiple times creates multiple keys in final JSON:
```go
logger := zerolog.New(os.Stderr).With().Timestamp().Logger()
logger.Info().
Timestamp().
Msg("dup")
// Output: {"level":"info","time":1494567715,"time":1494567715,"message":"dup"}
```
In this case, many consumers will take the last value, but this is not guaranteed; check yours if in doubt.

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