init
This commit is contained in:
commit
47db707cd9
GPG Key ID:
728ACCB59341E7E4
|
|
@ -0,0 +1 @@
|
|||
.idea/
|
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module gin-test
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|
||||
go 1.17
|
||||
|
||||
require (
|
||||
github.com/gin-gonic/gin v1.7.4 // indirect
|
||||
github.com/go-chi/chi v1.5.4 // indirect
|
||||
github.com/go-chi/chi/v5 v5.0.5
|
||||
)
|
||||
|
||||
require github.com/unrolled/render v1.4.0
|
||||
|
||||
require (
|
||||
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/golang/protobuf v1.3.3 // indirect
|
||||
github.com/json-iterator/go v1.1.9 // indirect
|
||||
github.com/leodido/go-urn v1.2.0 // 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/ugorji/go/codec v1.1.7 // indirect
|
||||
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 // indirect
|
||||
golang.org/x/sys v0.0.0-20210525143221-35b2ab0089ea // indirect
|
||||
gopkg.in/yaml.v2 v2.2.8 // indirect
|
||||
)
|
||||
|
|
@ -0,0 +1,65 @@
|
|||
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
|
||||
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
|
||||
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
|
||||
github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
|
||||
github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
|
||||
github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
|
||||
github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
|
||||
github.com/gin-gonic/gin v1.7.4 h1:QmUZXrvJ9qZ3GfWvQ+2wnW/1ePrTEJqPKMYEU3lD/DM=
|
||||
github.com/gin-gonic/gin v1.7.4/go.mod h1:jD2toBW3GZUr5UMcdrwQA10I7RuaFOl/SGeDjXkfUtY=
|
||||
github.com/go-chi/chi v1.5.4 h1:QHdzF2szwjqVV4wmByUnTcsbIg7UGaQ0tPF2t5GcAIs=
|
||||
github.com/go-chi/chi v1.5.4/go.mod h1:uaf8YgoFazUOkPBG7fxPftUylNumIev9awIWOENIuEg=
|
||||
github.com/go-chi/chi/v5 v5.0.5 h1:l3RJ8T8TAqLsXFfah+RA6N4pydMbPwSdvNM+AFWvLUM=
|
||||
github.com/go-chi/chi/v5 v5.0.5/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
|
||||
github.com/go-playground/assert/v2 v2.0.1 h1:MsBgLAaY856+nPRTKrp3/OZK38U/wa0CcBYNjji3q3A=
|
||||
github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
|
||||
github.com/go-playground/locales v0.13.0 h1:HyWk6mgj5qFqCT5fjGBuRArbVDfE4hi8+e8ceBS/t7Q=
|
||||
github.com/go-playground/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTMfnGwq/HNwmWNS8=
|
||||
github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD876Lmtgy7VtROAbHHXk8no=
|
||||
github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
|
||||
github.com/go-playground/validator/v10 v10.4.1 h1:pH2c5ADXtd66mxoE0Zm9SUhxE20r7aM3F26W0hOn+GE=
|
||||
github.com/go-playground/validator/v10 v10.4.1/go.mod h1:nlOn6nFhuKACm19sB/8EGNn9GlaMV7XkbRSipzJ0Ii4=
|
||||
github.com/golang/protobuf v1.3.3 h1:gyjaxf+svBWX08ZjK86iN9geUJF0H6gp2IRKX6Nf6/I=
|
||||
github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
|
||||
github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
|
||||
github.com/json-iterator/go v1.1.9 h1:9yzud/Ht36ygwatGx56VwCZtlI/2AD15T1X2sjSuGns=
|
||||
github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
|
||||
github.com/leodido/go-urn v1.2.0 h1:hpXL4XnriNwQ/ABnpepYM/1vCLWNDfUNts8dX3xTG6Y=
|
||||
github.com/leodido/go-urn v1.2.0/go.mod h1:+8+nEpDfqqsY+g338gtMEUOtuK+4dEMhiQEgxpxOKII=
|
||||
github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
|
||||
github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
|
||||
github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 h1:ZqeYNhU3OHLH3mGKHDcjJRFFRrJa6eAM5H+CtDdOsPc=
|
||||
github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
|
||||
github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 h1:Esafd1046DLDQ0W1YjYsBW+p8U2u7vzgW2SQVmlNazg=
|
||||
github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
|
||||
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
|
||||
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
|
||||
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
|
||||
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
|
||||
github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
|
||||
github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
|
||||
github.com/ugorji/go v1.1.7 h1:/68gy2h+1mWMrwZFeD1kQialdSzAb432dtpeJ42ovdo=
|
||||
github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
|
||||
github.com/ugorji/go/codec v1.1.7 h1:2SvQaVZ1ouYrrKKwoSk2pzd4A9evlKJb9oTL+OaLUSs=
|
||||
github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
|
||||
github.com/unrolled/render v1.4.0 h1:p73obhpsXuE3paXOtcuXTBKgBJpLCfmABnsUiO35x+Q=
|
||||
github.com/unrolled/render v1.4.0/go.mod h1:cK4RSTTVdND5j9EYEc0LAMOvdG11JeiKjyjfyZRvV2w=
|
||||
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
|
||||
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=
|
||||
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
|
||||
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
|
||||
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
|
||||
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20200116001909-b77594299b42 h1:vEOn+mP2zCOVzKckCZy6YsCtDblrpj/w7B9nxGNELpg=
|
||||
golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20210525143221-35b2ab0089ea h1:+WiDlPBBaO+h9vPNZi8uJ3k4BkKQB7Iow3aqwHVA5hI=
|
||||
golang.org/x/sys v0.0.0-20210525143221-35b2ab0089ea/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
|
||||
golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
|
||||
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
|
||||
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
|
||||
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
|
||||
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
|
||||
gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
|
||||
gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
|
||||
|
|
@ -0,0 +1,46 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"github.com/unrolled/render"
|
||||
"html/template"
|
||||
"io"
|
||||
"net/http"
|
||||
)
|
||||
|
||||
type LayoutMiddlewareResponseWriter struct {
|
||||
http.ResponseWriter
|
||||
buf *bytes.Buffer
|
||||
}
|
||||
|
||||
func (myrw *LayoutMiddlewareResponseWriter) Write(p []byte) (int, error) {
|
||||
return myrw.buf.Write(p)
|
||||
}
|
||||
|
||||
|
||||
func TemplateMiddelware(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
render := render.New(render.Options{
|
||||
Layout: "layout",
|
||||
FileSystem: &render.EmbedFileSystem{
|
||||
FS: webserver,
|
||||
},
|
||||
})
|
||||
|
||||
rw := &LayoutMiddlewareResponseWriter{
|
||||
ResponseWriter: w,
|
||||
buf: &bytes.Buffer{},
|
||||
}
|
||||
|
||||
|
||||
next.ServeHTTP(rw, r)
|
||||
|
||||
content, err := io.ReadAll(rw.buf)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
rw.buf.Reset()
|
||||
render.HTML(w, http.StatusOK, "sub", template.HTML(string(content)))
|
||||
})
|
||||
}
|
||||
|
|
@ -0,0 +1,42 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"embed"
|
||||
"gin-test/pkg/sample"
|
||||
"net/http"
|
||||
|
||||
"github.com/go-chi/chi/v5"
|
||||
"github.com/go-chi/chi/v5/middleware"
|
||||
"github.com/unrolled/render"
|
||||
)
|
||||
|
||||
// content holds our static web server content.
|
||||
//go:embed static/* templates/*
|
||||
var webserver embed.FS
|
||||
|
||||
|
||||
func main() {
|
||||
r := chi.NewRouter()
|
||||
render := render.New(render.Options{
|
||||
FileSystem: &render.EmbedFileSystem{
|
||||
FS: webserver,
|
||||
},
|
||||
})
|
||||
r.Use(middleware.Logger)
|
||||
|
||||
r.Handle("/static/*", http.FileServer(http.FS(webserver)))
|
||||
r.Group(func(r chi.Router) {
|
||||
r.Use(TemplateMiddelware)
|
||||
r.Get("/", func(w http.ResponseWriter, r *http.Request) {
|
||||
render.HTML(w, http.StatusOK, "index", map[string]string {"title": "Soeren"})
|
||||
})
|
||||
sample.Register(r)
|
||||
})
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
http.ListenAndServe(":3000", r)
|
||||
}
|
||||
|
||||
|
|
@ -0,0 +1,29 @@
|
|||
package sample
|
||||
|
||||
import (
|
||||
"embed"
|
||||
"github.com/go-chi/chi/v5"
|
||||
"github.com/unrolled/render"
|
||||
"net/http"
|
||||
)
|
||||
|
||||
// content holds our static web server content.
|
||||
//go:embed templates/*
|
||||
var webserver embed.FS
|
||||
|
||||
var ren *render.Render
|
||||
|
||||
func Register(router chi.Router) {
|
||||
ren = render.New(render.Options{
|
||||
//Layout: "layout",
|
||||
FileSystem: &render.EmbedFileSystem{
|
||||
FS: webserver,
|
||||
},
|
||||
})
|
||||
|
||||
router.Get("/sample", sampleCall)
|
||||
}
|
||||
|
||||
func sampleCall(w http.ResponseWriter, r *http.Request) {
|
||||
ren.HTML(w, http.StatusOK, "ssp", map[string]string {"title": "World"})
|
||||
}
|
||||
|
|
@ -0,0 +1 @@
|
|||
BLABLA <b>Something</b>
|
||||
File diff suppressed because one or more lines are too long
|
|
@ -0,0 +1 @@
|
|||
adfköa
|
||||
|
|
@ -0,0 +1,4 @@
|
|||
|
||||
<h1>
|
||||
Hello {{ .title }}
|
||||
</h1>
|
||||
|
|
@ -0,0 +1,20 @@
|
|||
<html>
|
||||
<head>
|
||||
<meta charset="utf-8">
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1">
|
||||
<title>My Layout</title>
|
||||
<link href="/static/bootstrap.min.css" rel="stylesheet" crossorigin="anonymous">
|
||||
|
||||
</head>
|
||||
<body>
|
||||
<div class="container">
|
||||
<div class="row">
|
||||
<div class="col-md-3">
|
||||
NAV
|
||||
</div>
|
||||
<div class="col-md-9"> {{ yield }}</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
</body>
|
||||
</html>
|
||||
|
|
@ -0,0 +1 @@
|
|||
{{ . }}
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
root = true
|
||||
|
||||
[*.go]
|
||||
indent_style = tab
|
||||
indent_size = 4
|
||||
insert_final_newline = true
|
||||
|
||||
[*.{yml,yaml}]
|
||||
indent_style = space
|
||||
indent_size = 2
|
||||
insert_final_newline = true
|
||||
trim_trailing_whitespace = true
|
||||
|
|
@ -0,0 +1 @@
|
|||
go.sum linguist-generated
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
# Setup a Global .gitignore for OS and editor generated files:
|
||||
# https://help.github.com/articles/ignoring-files
|
||||
# git config --global core.excludesfile ~/.gitignore_global
|
||||
|
||||
.vagrant
|
||||
*.sublime-project
|
||||
|
|
@ -0,0 +1,36 @@
|
|||
sudo: false
|
||||
language: go
|
||||
|
||||
go:
|
||||
- "stable"
|
||||
- "1.11.x"
|
||||
- "1.10.x"
|
||||
- "1.9.x"
|
||||
|
||||
matrix:
|
||||
include:
|
||||
- go: "stable"
|
||||
env: GOLINT=true
|
||||
allow_failures:
|
||||
- go: tip
|
||||
fast_finish: true
|
||||
|
||||
|
||||
before_install:
|
||||
- if [ ! -z "${GOLINT}" ]; then go get -u golang.org/x/lint/golint; fi
|
||||
|
||||
script:
|
||||
- go test --race ./...
|
||||
|
||||
after_script:
|
||||
- test -z "$(gofmt -s -l -w . | tee /dev/stderr)"
|
||||
- if [ ! -z "${GOLINT}" ]; then echo running golint; golint --set_exit_status ./...; else echo skipping golint; fi
|
||||
- go vet ./...
|
||||
|
||||
os:
|
||||
- linux
|
||||
- osx
|
||||
- windows
|
||||
|
||||
notifications:
|
||||
email: false
|
||||
|
|
@ -0,0 +1,52 @@
|
|||
# Names should be added to this file as
|
||||
# Name or Organization <email address>
|
||||
# The email address is not required for organizations.
|
||||
|
||||
# You can update this list using the following command:
|
||||
#
|
||||
# $ git shortlog -se | awk '{print $2 " " $3 " " $4}'
|
||||
|
||||
# Please keep the list sorted.
|
||||
|
||||
Aaron L <aaron@bettercoder.net>
|
||||
Adrien Bustany <adrien@bustany.org>
|
||||
Amit Krishnan <amit.krishnan@oracle.com>
|
||||
Anmol Sethi <me@anmol.io>
|
||||
Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
|
||||
Bruno Bigras <bigras.bruno@gmail.com>
|
||||
Caleb Spare <cespare@gmail.com>
|
||||
Case Nelson <case@teammating.com>
|
||||
Chris Howey <chris@howey.me> <howeyc@gmail.com>
|
||||
Christoffer Buchholz <christoffer.buchholz@gmail.com>
|
||||
Daniel Wagner-Hall <dawagner@gmail.com>
|
||||
Dave Cheney <dave@cheney.net>
|
||||
Evan Phoenix <evan@fallingsnow.net>
|
||||
Francisco Souza <f@souza.cc>
|
||||
Hari haran <hariharan.uno@gmail.com>
|
||||
John C Barstow
|
||||
Kelvin Fo <vmirage@gmail.com>
|
||||
Ken-ichirou MATSUZAWA <chamas@h4.dion.ne.jp>
|
||||
Matt Layher <mdlayher@gmail.com>
|
||||
Nathan Youngman <git@nathany.com>
|
||||
Nickolai Zeldovich <nickolai@csail.mit.edu>
|
||||
Patrick <patrick@dropbox.com>
|
||||
Paul Hammond <paul@paulhammond.org>
|
||||
Pawel Knap <pawelknap88@gmail.com>
|
||||
Pieter Droogendijk <pieter@binky.org.uk>
|
||||
Pursuit92 <JoshChase@techpursuit.net>
|
||||
Riku Voipio <riku.voipio@linaro.org>
|
||||
Rob Figueiredo <robfig@gmail.com>
|
||||
Rodrigo Chiossi <rodrigochiossi@gmail.com>
|
||||
Slawek Ligus <root@ooz.ie>
|
||||
Soge Zhang <zhssoge@gmail.com>
|
||||
Tiffany Jernigan <tiffany.jernigan@intel.com>
|
||||
Tilak Sharma <tilaks@google.com>
|
||||
Tom Payne <twpayne@gmail.com>
|
||||
Travis Cline <travis.cline@gmail.com>
|
||||
Tudor Golubenco <tudor.g@gmail.com>
|
||||
Vahe Khachikyan <vahe@live.ca>
|
||||
Yukang <moorekang@gmail.com>
|
||||
bronze1man <bronze1man@gmail.com>
|
||||
debrando <denis.brandolini@gmail.com>
|
||||
henrikedwards <henrik.edwards@gmail.com>
|
||||
铁哥 <guotie.9@gmail.com>
|
||||
|
|
@ -0,0 +1,317 @@
|
|||
# Changelog
|
||||
|
||||
## v1.4.7 / 2018-01-09
|
||||
|
||||
* BSD/macOS: Fix possible deadlock on closing the watcher on kqueue (thanks @nhooyr and @glycerine)
|
||||
* Tests: Fix missing verb on format string (thanks @rchiossi)
|
||||
* Linux: Fix deadlock in Remove (thanks @aarondl)
|
||||
* Linux: Watch.Add improvements (avoid race, fix consistency, reduce garbage) (thanks @twpayne)
|
||||
* Docs: Moved FAQ into the README (thanks @vahe)
|
||||
* Linux: Properly handle inotify's IN_Q_OVERFLOW event (thanks @zeldovich)
|
||||
* Docs: replace references to OS X with macOS
|
||||
|
||||
## v1.4.2 / 2016-10-10
|
||||
|
||||
* Linux: use InotifyInit1 with IN_CLOEXEC to stop leaking a file descriptor to a child process when using fork/exec [#178](https://github.com/fsnotify/fsnotify/pull/178) (thanks @pattyshack)
|
||||
|
||||
## v1.4.1 / 2016-10-04
|
||||
|
||||
* Fix flaky inotify stress test on Linux [#177](https://github.com/fsnotify/fsnotify/pull/177) (thanks @pattyshack)
|
||||
|
||||
## v1.4.0 / 2016-10-01
|
||||
|
||||
* add a String() method to Event.Op [#165](https://github.com/fsnotify/fsnotify/pull/165) (thanks @oozie)
|
||||
|
||||
## v1.3.1 / 2016-06-28
|
||||
|
||||
* Windows: fix for double backslash when watching the root of a drive [#151](https://github.com/fsnotify/fsnotify/issues/151) (thanks @brunoqc)
|
||||
|
||||
## v1.3.0 / 2016-04-19
|
||||
|
||||
* Support linux/arm64 by [patching](https://go-review.googlesource.com/#/c/21971/) x/sys/unix and switching to to it from syscall (thanks @suihkulokki) [#135](https://github.com/fsnotify/fsnotify/pull/135)
|
||||
|
||||
## v1.2.10 / 2016-03-02
|
||||
|
||||
* Fix golint errors in windows.go [#121](https://github.com/fsnotify/fsnotify/pull/121) (thanks @tiffanyfj)
|
||||
|
||||
## v1.2.9 / 2016-01-13
|
||||
|
||||
kqueue: Fix logic for CREATE after REMOVE [#111](https://github.com/fsnotify/fsnotify/pull/111) (thanks @bep)
|
||||
|
||||
## v1.2.8 / 2015-12-17
|
||||
|
||||
* kqueue: fix race condition in Close [#105](https://github.com/fsnotify/fsnotify/pull/105) (thanks @djui for reporting the issue and @ppknap for writing a failing test)
|
||||
* inotify: fix race in test
|
||||
* enable race detection for continuous integration (Linux, Mac, Windows)
|
||||
|
||||
## v1.2.5 / 2015-10-17
|
||||
|
||||
* inotify: use epoll_create1 for arm64 support (requires Linux 2.6.27 or later) [#100](https://github.com/fsnotify/fsnotify/pull/100) (thanks @suihkulokki)
|
||||
* inotify: fix path leaks [#73](https://github.com/fsnotify/fsnotify/pull/73) (thanks @chamaken)
|
||||
* kqueue: watch for rename events on subdirectories [#83](https://github.com/fsnotify/fsnotify/pull/83) (thanks @guotie)
|
||||
* kqueue: avoid infinite loops from symlinks cycles [#101](https://github.com/fsnotify/fsnotify/pull/101) (thanks @illicitonion)
|
||||
|
||||
## v1.2.1 / 2015-10-14
|
||||
|
||||
* kqueue: don't watch named pipes [#98](https://github.com/fsnotify/fsnotify/pull/98) (thanks @evanphx)
|
||||
|
||||
## v1.2.0 / 2015-02-08
|
||||
|
||||
* inotify: use epoll to wake up readEvents [#66](https://github.com/fsnotify/fsnotify/pull/66) (thanks @PieterD)
|
||||
* inotify: closing watcher should now always shut down goroutine [#63](https://github.com/fsnotify/fsnotify/pull/63) (thanks @PieterD)
|
||||
* kqueue: close kqueue after removing watches, fixes [#59](https://github.com/fsnotify/fsnotify/issues/59)
|
||||
|
||||
## v1.1.1 / 2015-02-05
|
||||
|
||||
* inotify: Retry read on EINTR [#61](https://github.com/fsnotify/fsnotify/issues/61) (thanks @PieterD)
|
||||
|
||||
## v1.1.0 / 2014-12-12
|
||||
|
||||
* kqueue: rework internals [#43](https://github.com/fsnotify/fsnotify/pull/43)
|
||||
* add low-level functions
|
||||
* only need to store flags on directories
|
||||
* less mutexes [#13](https://github.com/fsnotify/fsnotify/issues/13)
|
||||
* done can be an unbuffered channel
|
||||
* remove calls to os.NewSyscallError
|
||||
* More efficient string concatenation for Event.String() [#52](https://github.com/fsnotify/fsnotify/pull/52) (thanks @mdlayher)
|
||||
* kqueue: fix regression in rework causing subdirectories to be watched [#48](https://github.com/fsnotify/fsnotify/issues/48)
|
||||
* kqueue: cleanup internal watch before sending remove event [#51](https://github.com/fsnotify/fsnotify/issues/51)
|
||||
|
||||
## v1.0.4 / 2014-09-07
|
||||
|
||||
* kqueue: add dragonfly to the build tags.
|
||||
* Rename source code files, rearrange code so exported APIs are at the top.
|
||||
* Add done channel to example code. [#37](https://github.com/fsnotify/fsnotify/pull/37) (thanks @chenyukang)
|
||||
|
||||
## v1.0.3 / 2014-08-19
|
||||
|
||||
* [Fix] Windows MOVED_TO now translates to Create like on BSD and Linux. [#36](https://github.com/fsnotify/fsnotify/issues/36)
|
||||
|
||||
## v1.0.2 / 2014-08-17
|
||||
|
||||
* [Fix] Missing create events on macOS. [#14](https://github.com/fsnotify/fsnotify/issues/14) (thanks @zhsso)
|
||||
* [Fix] Make ./path and path equivalent. (thanks @zhsso)
|
||||
|
||||
## v1.0.0 / 2014-08-15
|
||||
|
||||
* [API] Remove AddWatch on Windows, use Add.
|
||||
* Improve documentation for exported identifiers. [#30](https://github.com/fsnotify/fsnotify/issues/30)
|
||||
* Minor updates based on feedback from golint.
|
||||
|
||||
## dev / 2014-07-09
|
||||
|
||||
* Moved to [github.com/fsnotify/fsnotify](https://github.com/fsnotify/fsnotify).
|
||||
* Use os.NewSyscallError instead of returning errno (thanks @hariharan-uno)
|
||||
|
||||
## dev / 2014-07-04
|
||||
|
||||
* kqueue: fix incorrect mutex used in Close()
|
||||
* Update example to demonstrate usage of Op.
|
||||
|
||||
## dev / 2014-06-28
|
||||
|
||||
* [API] Don't set the Write Op for attribute notifications [#4](https://github.com/fsnotify/fsnotify/issues/4)
|
||||
* Fix for String() method on Event (thanks Alex Brainman)
|
||||
* Don't build on Plan 9 or Solaris (thanks @4ad)
|
||||
|
||||
## dev / 2014-06-21
|
||||
|
||||
* Events channel of type Event rather than *Event.
|
||||
* [internal] use syscall constants directly for inotify and kqueue.
|
||||
* [internal] kqueue: rename events to kevents and fileEvent to event.
|
||||
|
||||
## dev / 2014-06-19
|
||||
|
||||
* Go 1.3+ required on Windows (uses syscall.ERROR_MORE_DATA internally).
|
||||
* [internal] remove cookie from Event struct (unused).
|
||||
* [internal] Event struct has the same definition across every OS.
|
||||
* [internal] remove internal watch and removeWatch methods.
|
||||
|
||||
## dev / 2014-06-12
|
||||
|
||||
* [API] Renamed Watch() to Add() and RemoveWatch() to Remove().
|
||||
* [API] Pluralized channel names: Events and Errors.
|
||||
* [API] Renamed FileEvent struct to Event.
|
||||
* [API] Op constants replace methods like IsCreate().
|
||||
|
||||
## dev / 2014-06-12
|
||||
|
||||
* Fix data race on kevent buffer (thanks @tilaks) [#98](https://github.com/howeyc/fsnotify/pull/98)
|
||||
|
||||
## dev / 2014-05-23
|
||||
|
||||
* [API] Remove current implementation of WatchFlags.
|
||||
* current implementation doesn't take advantage of OS for efficiency
|
||||
* provides little benefit over filtering events as they are received, but has extra bookkeeping and mutexes
|
||||
* no tests for the current implementation
|
||||
* not fully implemented on Windows [#93](https://github.com/howeyc/fsnotify/issues/93#issuecomment-39285195)
|
||||
|
||||
## v0.9.3 / 2014-12-31
|
||||
|
||||
* kqueue: cleanup internal watch before sending remove event [#51](https://github.com/fsnotify/fsnotify/issues/51)
|
||||
|
||||
## v0.9.2 / 2014-08-17
|
||||
|
||||
* [Backport] Fix missing create events on macOS. [#14](https://github.com/fsnotify/fsnotify/issues/14) (thanks @zhsso)
|
||||
|
||||
## v0.9.1 / 2014-06-12
|
||||
|
||||
* Fix data race on kevent buffer (thanks @tilaks) [#98](https://github.com/howeyc/fsnotify/pull/98)
|
||||
|
||||
## v0.9.0 / 2014-01-17
|
||||
|
||||
* IsAttrib() for events that only concern a file's metadata [#79][] (thanks @abustany)
|
||||
* [Fix] kqueue: fix deadlock [#77][] (thanks @cespare)
|
||||
* [NOTICE] Development has moved to `code.google.com/p/go.exp/fsnotify` in preparation for inclusion in the Go standard library.
|
||||
|
||||
## v0.8.12 / 2013-11-13
|
||||
|
||||
* [API] Remove FD_SET and friends from Linux adapter
|
||||
|
||||
## v0.8.11 / 2013-11-02
|
||||
|
||||
* [Doc] Add Changelog [#72][] (thanks @nathany)
|
||||
* [Doc] Spotlight and double modify events on macOS [#62][] (reported by @paulhammond)
|
||||
|
||||
## v0.8.10 / 2013-10-19
|
||||
|
||||
* [Fix] kqueue: remove file watches when parent directory is removed [#71][] (reported by @mdwhatcott)
|
||||
* [Fix] kqueue: race between Close and readEvents [#70][] (reported by @bernerdschaefer)
|
||||
* [Doc] specify OS-specific limits in README (thanks @debrando)
|
||||
|
||||
## v0.8.9 / 2013-09-08
|
||||
|
||||
* [Doc] Contributing (thanks @nathany)
|
||||
* [Doc] update package path in example code [#63][] (thanks @paulhammond)
|
||||
* [Doc] GoCI badge in README (Linux only) [#60][]
|
||||
* [Doc] Cross-platform testing with Vagrant [#59][] (thanks @nathany)
|
||||
|
||||
## v0.8.8 / 2013-06-17
|
||||
|
||||
* [Fix] Windows: handle `ERROR_MORE_DATA` on Windows [#49][] (thanks @jbowtie)
|
||||
|
||||
## v0.8.7 / 2013-06-03
|
||||
|
||||
* [API] Make syscall flags internal
|
||||
* [Fix] inotify: ignore event changes
|
||||
* [Fix] race in symlink test [#45][] (reported by @srid)
|
||||
* [Fix] tests on Windows
|
||||
* lower case error messages
|
||||
|
||||
## v0.8.6 / 2013-05-23
|
||||
|
||||
* kqueue: Use EVT_ONLY flag on Darwin
|
||||
* [Doc] Update README with full example
|
||||
|
||||
## v0.8.5 / 2013-05-09
|
||||
|
||||
* [Fix] inotify: allow monitoring of "broken" symlinks (thanks @tsg)
|
||||
|
||||
## v0.8.4 / 2013-04-07
|
||||
|
||||
* [Fix] kqueue: watch all file events [#40][] (thanks @ChrisBuchholz)
|
||||
|
||||
## v0.8.3 / 2013-03-13
|
||||
|
||||
* [Fix] inoitfy/kqueue memory leak [#36][] (reported by @nbkolchin)
|
||||
* [Fix] kqueue: use fsnFlags for watching a directory [#33][] (reported by @nbkolchin)
|
||||
|
||||
## v0.8.2 / 2013-02-07
|
||||
|
||||
* [Doc] add Authors
|
||||
* [Fix] fix data races for map access [#29][] (thanks @fsouza)
|
||||
|
||||
## v0.8.1 / 2013-01-09
|
||||
|
||||
* [Fix] Windows path separators
|
||||
* [Doc] BSD License
|
||||
|
||||
## v0.8.0 / 2012-11-09
|
||||
|
||||
* kqueue: directory watching improvements (thanks @vmirage)
|
||||
* inotify: add `IN_MOVED_TO` [#25][] (requested by @cpisto)
|
||||
* [Fix] kqueue: deleting watched directory [#24][] (reported by @jakerr)
|
||||
|
||||
## v0.7.4 / 2012-10-09
|
||||
|
||||
* [Fix] inotify: fixes from https://codereview.appspot.com/5418045/ (ugorji)
|
||||
* [Fix] kqueue: preserve watch flags when watching for delete [#21][] (reported by @robfig)
|
||||
* [Fix] kqueue: watch the directory even if it isn't a new watch (thanks @robfig)
|
||||
* [Fix] kqueue: modify after recreation of file
|
||||
|
||||
## v0.7.3 / 2012-09-27
|
||||
|
||||
* [Fix] kqueue: watch with an existing folder inside the watched folder (thanks @vmirage)
|
||||
* [Fix] kqueue: no longer get duplicate CREATE events
|
||||
|
||||
## v0.7.2 / 2012-09-01
|
||||
|
||||
* kqueue: events for created directories
|
||||
|
||||
## v0.7.1 / 2012-07-14
|
||||
|
||||
* [Fix] for renaming files
|
||||
|
||||
## v0.7.0 / 2012-07-02
|
||||
|
||||
* [Feature] FSNotify flags
|
||||
* [Fix] inotify: Added file name back to event path
|
||||
|
||||
## v0.6.0 / 2012-06-06
|
||||
|
||||
* kqueue: watch files after directory created (thanks @tmc)
|
||||
|
||||
## v0.5.1 / 2012-05-22
|
||||
|
||||
* [Fix] inotify: remove all watches before Close()
|
||||
|
||||
## v0.5.0 / 2012-05-03
|
||||
|
||||
* [API] kqueue: return errors during watch instead of sending over channel
|
||||
* kqueue: match symlink behavior on Linux
|
||||
* inotify: add `DELETE_SELF` (requested by @taralx)
|
||||
* [Fix] kqueue: handle EINTR (reported by @robfig)
|
||||
* [Doc] Godoc example [#1][] (thanks @davecheney)
|
||||
|
||||
## v0.4.0 / 2012-03-30
|
||||
|
||||
* Go 1 released: build with go tool
|
||||
* [Feature] Windows support using winfsnotify
|
||||
* Windows does not have attribute change notifications
|
||||
* Roll attribute notifications into IsModify
|
||||
|
||||
## v0.3.0 / 2012-02-19
|
||||
|
||||
* kqueue: add files when watch directory
|
||||
|
||||
## v0.2.0 / 2011-12-30
|
||||
|
||||
* update to latest Go weekly code
|
||||
|
||||
## v0.1.0 / 2011-10-19
|
||||
|
||||
* kqueue: add watch on file creation to match inotify
|
||||
* kqueue: create file event
|
||||
* inotify: ignore `IN_IGNORED` events
|
||||
* event String()
|
||||
* linux: common FileEvent functions
|
||||
* initial commit
|
||||
|
||||
[#79]: https://github.com/howeyc/fsnotify/pull/79
|
||||
[#77]: https://github.com/howeyc/fsnotify/pull/77
|
||||
[#72]: https://github.com/howeyc/fsnotify/issues/72
|
||||
[#71]: https://github.com/howeyc/fsnotify/issues/71
|
||||
[#70]: https://github.com/howeyc/fsnotify/issues/70
|
||||
[#63]: https://github.com/howeyc/fsnotify/issues/63
|
||||
[#62]: https://github.com/howeyc/fsnotify/issues/62
|
||||
[#60]: https://github.com/howeyc/fsnotify/issues/60
|
||||
[#59]: https://github.com/howeyc/fsnotify/issues/59
|
||||
[#49]: https://github.com/howeyc/fsnotify/issues/49
|
||||
[#45]: https://github.com/howeyc/fsnotify/issues/45
|
||||
[#40]: https://github.com/howeyc/fsnotify/issues/40
|
||||
[#36]: https://github.com/howeyc/fsnotify/issues/36
|
||||
[#33]: https://github.com/howeyc/fsnotify/issues/33
|
||||
[#29]: https://github.com/howeyc/fsnotify/issues/29
|
||||
[#25]: https://github.com/howeyc/fsnotify/issues/25
|
||||
[#24]: https://github.com/howeyc/fsnotify/issues/24
|
||||
[#21]: https://github.com/howeyc/fsnotify/issues/21
|
||||
|
|
@ -0,0 +1,77 @@
|
|||
# Contributing
|
||||
|
||||
## Issues
|
||||
|
||||
* Request features and report bugs using the [GitHub Issue Tracker](https://github.com/fsnotify/fsnotify/issues).
|
||||
* Please indicate the platform you are using fsnotify on.
|
||||
* A code example to reproduce the problem is appreciated.
|
||||
|
||||
## Pull Requests
|
||||
|
||||
### Contributor License Agreement
|
||||
|
||||
fsnotify is derived from code in the [golang.org/x/exp](https://godoc.org/golang.org/x/exp) package and it may be included [in the standard library](https://github.com/fsnotify/fsnotify/issues/1) in the future. Therefore fsnotify carries the same [LICENSE](https://github.com/fsnotify/fsnotify/blob/master/LICENSE) as Go. Contributors retain their copyright, so you need to fill out a short form before we can accept your contribution: [Google Individual Contributor License Agreement](https://developers.google.com/open-source/cla/individual).
|
||||
|
||||
Please indicate that you have signed the CLA in your pull request.
|
||||
|
||||
### How fsnotify is Developed
|
||||
|
||||
* Development is done on feature branches.
|
||||
* Tests are run on BSD, Linux, macOS and Windows.
|
||||
* Pull requests are reviewed and [applied to master][am] using [hub][].
|
||||
* Maintainers may modify or squash commits rather than asking contributors to.
|
||||
* To issue a new release, the maintainers will:
|
||||
* Update the CHANGELOG
|
||||
* Tag a version, which will become available through gopkg.in.
|
||||
|
||||
### How to Fork
|
||||
|
||||
For smooth sailing, always use the original import path. Installing with `go get` makes this easy.
|
||||
|
||||
1. Install from GitHub (`go get -u github.com/fsnotify/fsnotify`)
|
||||
2. Create your feature branch (`git checkout -b my-new-feature`)
|
||||
3. Ensure everything works and the tests pass (see below)
|
||||
4. Commit your changes (`git commit -am 'Add some feature'`)
|
||||
|
||||
Contribute upstream:
|
||||
|
||||
1. Fork fsnotify on GitHub
|
||||
2. Add your remote (`git remote add fork git@github.com:mycompany/repo.git`)
|
||||
3. Push to the branch (`git push fork my-new-feature`)
|
||||
4. Create a new Pull Request on GitHub
|
||||
|
||||
This workflow is [thoroughly explained by Katrina Owen](https://splice.com/blog/contributing-open-source-git-repositories-go/).
|
||||
|
||||
### Testing
|
||||
|
||||
fsnotify uses build tags to compile different code on Linux, BSD, macOS, and Windows.
|
||||
|
||||
Before doing a pull request, please do your best to test your changes on multiple platforms, and list which platforms you were able/unable to test on.
|
||||
|
||||
To aid in cross-platform testing there is a Vagrantfile for Linux and BSD.
|
||||
|
||||
* Install [Vagrant](http://www.vagrantup.com/) and [VirtualBox](https://www.virtualbox.org/)
|
||||
* Setup [Vagrant Gopher](https://github.com/nathany/vagrant-gopher) in your `src` folder.
|
||||
* Run `vagrant up` from the project folder. You can also setup just one box with `vagrant up linux` or `vagrant up bsd` (note: the BSD box doesn't support Windows hosts at this time, and NFS may prompt for your host OS password)
|
||||
* Once setup, you can run the test suite on a given OS with a single command `vagrant ssh linux -c 'cd fsnotify/fsnotify; go test'`.
|
||||
* When you're done, you will want to halt or destroy the Vagrant boxes.
|
||||
|
||||
Notice: fsnotify file system events won't trigger in shared folders. The tests get around this limitation by using the /tmp directory.
|
||||
|
||||
Right now there is no equivalent solution for Windows and macOS, but there are Windows VMs [freely available from Microsoft](http://www.modern.ie/en-us/virtualization-tools#downloads).
|
||||
|
||||
### Maintainers
|
||||
|
||||
Help maintaining fsnotify is welcome. To be a maintainer:
|
||||
|
||||
* Submit a pull request and sign the CLA as above.
|
||||
* You must be able to run the test suite on Mac, Windows, Linux and BSD.
|
||||
|
||||
To keep master clean, the fsnotify project uses the "apply mail" workflow outlined in Nathaniel Talbott's post ["Merge pull request" Considered Harmful][am]. This requires installing [hub][].
|
||||
|
||||
All code changes should be internal pull requests.
|
||||
|
||||
Releases are tagged using [Semantic Versioning](http://semver.org/).
|
||||
|
||||
[hub]: https://github.com/github/hub
|
||||
[am]: http://blog.spreedly.com/2014/06/24/merge-pull-request-considered-harmful/#.VGa5yZPF_Zs
|
||||
|
|
@ -0,0 +1,28 @@
|
|||
Copyright (c) 2012 The Go Authors. All rights reserved.
|
||||
Copyright (c) 2012-2019 fsnotify Authors. All rights reserved.
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are
|
||||
met:
|
||||
|
||||
* Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
* Redistributions in binary form must reproduce the above
|
||||
copyright notice, this list of conditions and the following disclaimer
|
||||
in the documentation and/or other materials provided with the
|
||||
distribution.
|
||||
* Neither the name of Google Inc. nor the names of its
|
||||
contributors may be used to endorse or promote products derived from
|
||||
this software without specific prior written permission.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
|
@ -0,0 +1,130 @@
|
|||
# File system notifications for Go
|
||||
|
||||
[](https://godoc.org/github.com/fsnotify/fsnotify) [](https://goreportcard.com/report/github.com/fsnotify/fsnotify)
|
||||
|
||||
fsnotify utilizes [golang.org/x/sys](https://godoc.org/golang.org/x/sys) rather than `syscall` from the standard library. Ensure you have the latest version installed by running:
|
||||
|
||||
```console
|
||||
go get -u golang.org/x/sys/...
|
||||
```
|
||||
|
||||
Cross platform: Windows, Linux, BSD and macOS.
|
||||
|
||||
| Adapter | OS | Status |
|
||||
| --------------------- | -------------------------------- | ------------------------------------------------------------------------------------------------------------------------------- |
|
||||
| inotify | Linux 2.6.27 or later, Android\* | Supported [](https://travis-ci.org/fsnotify/fsnotify) |
|
||||
| kqueue | BSD, macOS, iOS\* | Supported [](https://travis-ci.org/fsnotify/fsnotify) |
|
||||
| ReadDirectoryChangesW | Windows | Supported [](https://travis-ci.org/fsnotify/fsnotify) |
|
||||
| FSEvents | macOS | [Planned](https://github.com/fsnotify/fsnotify/issues/11) |
|
||||
| FEN | Solaris 11 | [In Progress](https://github.com/fsnotify/fsnotify/issues/12) |
|
||||
| fanotify | Linux 2.6.37+ | [Planned](https://github.com/fsnotify/fsnotify/issues/114) |
|
||||
| USN Journals | Windows | [Maybe](https://github.com/fsnotify/fsnotify/issues/53) |
|
||||
| Polling | *All* | [Maybe](https://github.com/fsnotify/fsnotify/issues/9) |
|
||||
|
||||
\* Android and iOS are untested.
|
||||
|
||||
Please see [the documentation](https://godoc.org/github.com/fsnotify/fsnotify) and consult the [FAQ](#faq) for usage information.
|
||||
|
||||
## API stability
|
||||
|
||||
fsnotify is a fork of [howeyc/fsnotify](https://godoc.org/github.com/howeyc/fsnotify) with a new API as of v1.0. The API is based on [this design document](http://goo.gl/MrYxyA).
|
||||
|
||||
All [releases](https://github.com/fsnotify/fsnotify/releases) are tagged based on [Semantic Versioning](http://semver.org/). Further API changes are [planned](https://github.com/fsnotify/fsnotify/milestones), and will be tagged with a new major revision number.
|
||||
|
||||
Go 1.6 supports dependencies located in the `vendor/` folder. Unless you are creating a library, it is recommended that you copy fsnotify into `vendor/github.com/fsnotify/fsnotify` within your project, and likewise for `golang.org/x/sys`.
|
||||
|
||||
## Usage
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"log"
|
||||
|
||||
"github.com/fsnotify/fsnotify"
|
||||
)
|
||||
|
||||
func main() {
|
||||
watcher, err := fsnotify.NewWatcher()
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
defer watcher.Close()
|
||||
|
||||
done := make(chan bool)
|
||||
go func() {
|
||||
for {
|
||||
select {
|
||||
case event, ok := <-watcher.Events:
|
||||
if !ok {
|
||||
return
|
||||
}
|
||||
log.Println("event:", event)
|
||||
if event.Op&fsnotify.Write == fsnotify.Write {
|
||||
log.Println("modified file:", event.Name)
|
||||
}
|
||||
case err, ok := <-watcher.Errors:
|
||||
if !ok {
|
||||
return
|
||||
}
|
||||
log.Println("error:", err)
|
||||
}
|
||||
}
|
||||
}()
|
||||
|
||||
err = watcher.Add("/tmp/foo")
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
<-done
|
||||
}
|
||||
```
|
||||
|
||||
## Contributing
|
||||
|
||||
Please refer to [CONTRIBUTING][] before opening an issue or pull request.
|
||||
|
||||
## Example
|
||||
|
||||
See [example_test.go](https://github.com/fsnotify/fsnotify/blob/master/example_test.go).
|
||||
|
||||
## FAQ
|
||||
|
||||
**When a file is moved to another directory is it still being watched?**
|
||||
|
||||
No (it shouldn't be, unless you are watching where it was moved to).
|
||||
|
||||
**When I watch a directory, are all subdirectories watched as well?**
|
||||
|
||||
No, you must add watches for any directory you want to watch (a recursive watcher is on the roadmap [#18][]).
|
||||
|
||||
**Do I have to watch the Error and Event channels in a separate goroutine?**
|
||||
|
||||
As of now, yes. Looking into making this single-thread friendly (see [howeyc #7][#7])
|
||||
|
||||
**Why am I receiving multiple events for the same file on OS X?**
|
||||
|
||||
Spotlight indexing on OS X can result in multiple events (see [howeyc #62][#62]). A temporary workaround is to add your folder(s) to the *Spotlight Privacy settings* until we have a native FSEvents implementation (see [#11][]).
|
||||
|
||||
**How many files can be watched at once?**
|
||||
|
||||
There are OS-specific limits as to how many watches can be created:
|
||||
* Linux: /proc/sys/fs/inotify/max_user_watches contains the limit, reaching this limit results in a "no space left on device" error.
|
||||
* BSD / OSX: sysctl variables "kern.maxfiles" and "kern.maxfilesperproc", reaching these limits results in a "too many open files" error.
|
||||
|
||||
**Why don't notifications work with NFS filesystems or filesystem in userspace (FUSE)?**
|
||||
|
||||
fsnotify requires support from underlying OS to work. The current NFS protocol does not provide network level support for file notifications.
|
||||
|
||||
[#62]: https://github.com/howeyc/fsnotify/issues/62
|
||||
[#18]: https://github.com/fsnotify/fsnotify/issues/18
|
||||
[#11]: https://github.com/fsnotify/fsnotify/issues/11
|
||||
[#7]: https://github.com/howeyc/fsnotify/issues/7
|
||||
|
||||
[contributing]: https://github.com/fsnotify/fsnotify/blob/master/CONTRIBUTING.md
|
||||
|
||||
## Related Projects
|
||||
|
||||
* [notify](https://github.com/rjeczalik/notify)
|
||||
* [fsevents](https://github.com/fsnotify/fsevents)
|
||||
|
||||
|
|
@ -0,0 +1,37 @@
|
|||
// Copyright 2010 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build solaris
|
||||
|
||||
package fsnotify
|
||||
|
||||
import (
|
||||
"errors"
|
||||
)
|
||||
|
||||
// Watcher watches a set of files, delivering events to a channel.
|
||||
type Watcher struct {
|
||||
Events chan Event
|
||||
Errors chan error
|
||||
}
|
||||
|
||||
// NewWatcher establishes a new watcher with the underlying OS and begins waiting for events.
|
||||
func NewWatcher() (*Watcher, error) {
|
||||
return nil, errors.New("FEN based watcher not yet supported for fsnotify\n")
|
||||
}
|
||||
|
||||
// Close removes all watches and closes the events channel.
|
||||
func (w *Watcher) Close() error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// Add starts watching the named file or directory (non-recursively).
|
||||
func (w *Watcher) Add(name string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// Remove stops watching the the named file or directory (non-recursively).
|
||||
func (w *Watcher) Remove(name string) error {
|
||||
return nil
|
||||
}
|
||||
|
|
@ -0,0 +1,68 @@
|
|||
// Copyright 2012 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build !plan9
|
||||
|
||||
// Package fsnotify provides a platform-independent interface for file system notifications.
|
||||
package fsnotify
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"errors"
|
||||
"fmt"
|
||||
)
|
||||
|
||||
// Event represents a single file system notification.
|
||||
type Event struct {
|
||||
Name string // Relative path to the file or directory.
|
||||
Op Op // File operation that triggered the event.
|
||||
}
|
||||
|
||||
// Op describes a set of file operations.
|
||||
type Op uint32
|
||||
|
||||
// These are the generalized file operations that can trigger a notification.
|
||||
const (
|
||||
Create Op = 1 << iota
|
||||
Write
|
||||
Remove
|
||||
Rename
|
||||
Chmod
|
||||
)
|
||||
|
||||
func (op Op) String() string {
|
||||
// Use a buffer for efficient string concatenation
|
||||
var buffer bytes.Buffer
|
||||
|
||||
if op&Create == Create {
|
||||
buffer.WriteString("|CREATE")
|
||||
}
|
||||
if op&Remove == Remove {
|
||||
buffer.WriteString("|REMOVE")
|
||||
}
|
||||
if op&Write == Write {
|
||||
buffer.WriteString("|WRITE")
|
||||
}
|
||||
if op&Rename == Rename {
|
||||
buffer.WriteString("|RENAME")
|
||||
}
|
||||
if op&Chmod == Chmod {
|
||||
buffer.WriteString("|CHMOD")
|
||||
}
|
||||
if buffer.Len() == 0 {
|
||||
return ""
|
||||
}
|
||||
return buffer.String()[1:] // Strip leading pipe
|
||||
}
|
||||
|
||||
// String returns a string representation of the event in the form
|
||||
// "file: REMOVE|WRITE|..."
|
||||
func (e Event) String() string {
|
||||
return fmt.Sprintf("%q: %s", e.Name, e.Op.String())
|
||||
}
|
||||
|
||||
// Common errors that can be reported by a watcher
|
||||
var (
|
||||
ErrEventOverflow = errors.New("fsnotify queue overflow")
|
||||
)
|
||||
|
|
@ -0,0 +1,337 @@
|
|||
// Copyright 2010 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build linux
|
||||
|
||||
package fsnotify
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"fmt"
|
||||
"io"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"strings"
|
||||
"sync"
|
||||
"unsafe"
|
||||
|
||||
"golang.org/x/sys/unix"
|
||||
)
|
||||
|
||||
// Watcher watches a set of files, delivering events to a channel.
|
||||
type Watcher struct {
|
||||
Events chan Event
|
||||
Errors chan error
|
||||
mu sync.Mutex // Map access
|
||||
fd int
|
||||
poller *fdPoller
|
||||
watches map[string]*watch // Map of inotify watches (key: path)
|
||||
paths map[int]string // Map of watched paths (key: watch descriptor)
|
||||
done chan struct{} // Channel for sending a "quit message" to the reader goroutine
|
||||
doneResp chan struct{} // Channel to respond to Close
|
||||
}
|
||||
|
||||
// NewWatcher establishes a new watcher with the underlying OS and begins waiting for events.
|
||||
func NewWatcher() (*Watcher, error) {
|
||||
// Create inotify fd
|
||||
fd, errno := unix.InotifyInit1(unix.IN_CLOEXEC)
|
||||
if fd == -1 {
|
||||
return nil, errno
|
||||
}
|
||||
// Create epoll
|
||||
poller, err := newFdPoller(fd)
|
||||
if err != nil {
|
||||
unix.Close(fd)
|
||||
return nil, err
|
||||
}
|
||||
w := &Watcher{
|
||||
fd: fd,
|
||||
poller: poller,
|
||||
watches: make(map[string]*watch),
|
||||
paths: make(map[int]string),
|
||||
Events: make(chan Event),
|
||||
Errors: make(chan error),
|
||||
done: make(chan struct{}),
|
||||
doneResp: make(chan struct{}),
|
||||
}
|
||||
|
||||
go w.readEvents()
|
||||
return w, nil
|
||||
}
|
||||
|
||||
func (w *Watcher) isClosed() bool {
|
||||
select {
|
||||
case <-w.done:
|
||||
return true
|
||||
default:
|
||||
return false
|
||||
}
|
||||
}
|
||||
|
||||
// Close removes all watches and closes the events channel.
|
||||
func (w *Watcher) Close() error {
|
||||
if w.isClosed() {
|
||||
return nil
|
||||
}
|
||||
|
||||
// Send 'close' signal to goroutine, and set the Watcher to closed.
|
||||
close(w.done)
|
||||
|
||||
// Wake up goroutine
|
||||
w.poller.wake()
|
||||
|
||||
// Wait for goroutine to close
|
||||
<-w.doneResp
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Add starts watching the named file or directory (non-recursively).
|
||||
func (w *Watcher) Add(name string) error {
|
||||
name = filepath.Clean(name)
|
||||
if w.isClosed() {
|
||||
return errors.New("inotify instance already closed")
|
||||
}
|
||||
|
||||
const agnosticEvents = unix.IN_MOVED_TO | unix.IN_MOVED_FROM |
|
||||
unix.IN_CREATE | unix.IN_ATTRIB | unix.IN_MODIFY |
|
||||
unix.IN_MOVE_SELF | unix.IN_DELETE | unix.IN_DELETE_SELF
|
||||
|
||||
var flags uint32 = agnosticEvents
|
||||
|
||||
w.mu.Lock()
|
||||
defer w.mu.Unlock()
|
||||
watchEntry := w.watches[name]
|
||||
if watchEntry != nil {
|
||||
flags |= watchEntry.flags | unix.IN_MASK_ADD
|
||||
}
|
||||
wd, errno := unix.InotifyAddWatch(w.fd, name, flags)
|
||||
if wd == -1 {
|
||||
return errno
|
||||
}
|
||||
|
||||
if watchEntry == nil {
|
||||
w.watches[name] = &watch{wd: uint32(wd), flags: flags}
|
||||
w.paths[wd] = name
|
||||
} else {
|
||||
watchEntry.wd = uint32(wd)
|
||||
watchEntry.flags = flags
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Remove stops watching the named file or directory (non-recursively).
|
||||
func (w *Watcher) Remove(name string) error {
|
||||
name = filepath.Clean(name)
|
||||
|
||||
// Fetch the watch.
|
||||
w.mu.Lock()
|
||||
defer w.mu.Unlock()
|
||||
watch, ok := w.watches[name]
|
||||
|
||||
// Remove it from inotify.
|
||||
if !ok {
|
||||
return fmt.Errorf("can't remove non-existent inotify watch for: %s", name)
|
||||
}
|
||||
|
||||
// We successfully removed the watch if InotifyRmWatch doesn't return an
|
||||
// error, we need to clean up our internal state to ensure it matches
|
||||
// inotify's kernel state.
|
||||
delete(w.paths, int(watch.wd))
|
||||
delete(w.watches, name)
|
||||
|
||||
// inotify_rm_watch will return EINVAL if the file has been deleted;
|
||||
// the inotify will already have been removed.
|
||||
// watches and pathes are deleted in ignoreLinux() implicitly and asynchronously
|
||||
// by calling inotify_rm_watch() below. e.g. readEvents() goroutine receives IN_IGNORE
|
||||
// so that EINVAL means that the wd is being rm_watch()ed or its file removed
|
||||
// by another thread and we have not received IN_IGNORE event.
|
||||
success, errno := unix.InotifyRmWatch(w.fd, watch.wd)
|
||||
if success == -1 {
|
||||
// TODO: Perhaps it's not helpful to return an error here in every case.
|
||||
// the only two possible errors are:
|
||||
// EBADF, which happens when w.fd is not a valid file descriptor of any kind.
|
||||
// EINVAL, which is when fd is not an inotify descriptor or wd is not a valid watch descriptor.
|
||||
// Watch descriptors are invalidated when they are removed explicitly or implicitly;
|
||||
// explicitly by inotify_rm_watch, implicitly when the file they are watching is deleted.
|
||||
return errno
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
type watch struct {
|
||||
wd uint32 // Watch descriptor (as returned by the inotify_add_watch() syscall)
|
||||
flags uint32 // inotify flags of this watch (see inotify(7) for the list of valid flags)
|
||||
}
|
||||
|
||||
// readEvents reads from the inotify file descriptor, converts the
|
||||
// received events into Event objects and sends them via the Events channel
|
||||
func (w *Watcher) readEvents() {
|
||||
var (
|
||||
buf [unix.SizeofInotifyEvent * 4096]byte // Buffer for a maximum of 4096 raw events
|
||||
n int // Number of bytes read with read()
|
||||
errno error // Syscall errno
|
||||
ok bool // For poller.wait
|
||||
)
|
||||
|
||||
defer close(w.doneResp)
|
||||
defer close(w.Errors)
|
||||
defer close(w.Events)
|
||||
defer unix.Close(w.fd)
|
||||
defer w.poller.close()
|
||||
|
||||
for {
|
||||
// See if we have been closed.
|
||||
if w.isClosed() {
|
||||
return
|
||||
}
|
||||
|
||||
ok, errno = w.poller.wait()
|
||||
if errno != nil {
|
||||
select {
|
||||
case w.Errors <- errno:
|
||||
case <-w.done:
|
||||
return
|
||||
}
|
||||
continue
|
||||
}
|
||||
|
||||
if !ok {
|
||||
continue
|
||||
}
|
||||
|
||||
n, errno = unix.Read(w.fd, buf[:])
|
||||
// If a signal interrupted execution, see if we've been asked to close, and try again.
|
||||
// http://man7.org/linux/man-pages/man7/signal.7.html :
|
||||
// "Before Linux 3.8, reads from an inotify(7) file descriptor were not restartable"
|
||||
if errno == unix.EINTR {
|
||||
continue
|
||||
}
|
||||
|
||||
// unix.Read might have been woken up by Close. If so, we're done.
|
||||
if w.isClosed() {
|
||||
return
|
||||
}
|
||||
|
||||
if n < unix.SizeofInotifyEvent {
|
||||
var err error
|
||||
if n == 0 {
|
||||
// If EOF is received. This should really never happen.
|
||||
err = io.EOF
|
||||
} else if n < 0 {
|
||||
// If an error occurred while reading.
|
||||
err = errno
|
||||
} else {
|
||||
// Read was too short.
|
||||
err = errors.New("notify: short read in readEvents()")
|
||||
}
|
||||
select {
|
||||
case w.Errors <- err:
|
||||
case <-w.done:
|
||||
return
|
||||
}
|
||||
continue
|
||||
}
|
||||
|
||||
var offset uint32
|
||||
// We don't know how many events we just read into the buffer
|
||||
// While the offset points to at least one whole event...
|
||||
for offset <= uint32(n-unix.SizeofInotifyEvent) {
|
||||
// Point "raw" to the event in the buffer
|
||||
raw := (*unix.InotifyEvent)(unsafe.Pointer(&buf[offset]))
|
||||
|
||||
mask := uint32(raw.Mask)
|
||||
nameLen := uint32(raw.Len)
|
||||
|
||||
if mask&unix.IN_Q_OVERFLOW != 0 {
|
||||
select {
|
||||
case w.Errors <- ErrEventOverflow:
|
||||
case <-w.done:
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
// If the event happened to the watched directory or the watched file, the kernel
|
||||
// doesn't append the filename to the event, but we would like to always fill the
|
||||
// the "Name" field with a valid filename. We retrieve the path of the watch from
|
||||
// the "paths" map.
|
||||
w.mu.Lock()
|
||||
name, ok := w.paths[int(raw.Wd)]
|
||||
// IN_DELETE_SELF occurs when the file/directory being watched is removed.
|
||||
// This is a sign to clean up the maps, otherwise we are no longer in sync
|
||||
// with the inotify kernel state which has already deleted the watch
|
||||
// automatically.
|
||||
if ok && mask&unix.IN_DELETE_SELF == unix.IN_DELETE_SELF {
|
||||
delete(w.paths, int(raw.Wd))
|
||||
delete(w.watches, name)
|
||||
}
|
||||
w.mu.Unlock()
|
||||
|
||||
if nameLen > 0 {
|
||||
// Point "bytes" at the first byte of the filename
|
||||
bytes := (*[unix.PathMax]byte)(unsafe.Pointer(&buf[offset+unix.SizeofInotifyEvent]))
|
||||
// The filename is padded with NULL bytes. TrimRight() gets rid of those.
|
||||
name += "/" + strings.TrimRight(string(bytes[0:nameLen]), "\000")
|
||||
}
|
||||
|
||||
event := newEvent(name, mask)
|
||||
|
||||
// Send the events that are not ignored on the events channel
|
||||
if !event.ignoreLinux(mask) {
|
||||
select {
|
||||
case w.Events <- event:
|
||||
case <-w.done:
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
// Move to the next event in the buffer
|
||||
offset += unix.SizeofInotifyEvent + nameLen
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Certain types of events can be "ignored" and not sent over the Events
|
||||
// channel. Such as events marked ignore by the kernel, or MODIFY events
|
||||
// against files that do not exist.
|
||||
func (e *Event) ignoreLinux(mask uint32) bool {
|
||||
// Ignore anything the inotify API says to ignore
|
||||
if mask&unix.IN_IGNORED == unix.IN_IGNORED {
|
||||
return true
|
||||
}
|
||||
|
||||
// If the event is not a DELETE or RENAME, the file must exist.
|
||||
// Otherwise the event is ignored.
|
||||
// *Note*: this was put in place because it was seen that a MODIFY
|
||||
// event was sent after the DELETE. This ignores that MODIFY and
|
||||
// assumes a DELETE will come or has come if the file doesn't exist.
|
||||
if !(e.Op&Remove == Remove || e.Op&Rename == Rename) {
|
||||
_, statErr := os.Lstat(e.Name)
|
||||
return os.IsNotExist(statErr)
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
// newEvent returns an platform-independent Event based on an inotify mask.
|
||||
func newEvent(name string, mask uint32) Event {
|
||||
e := Event{Name: name}
|
||||
if mask&unix.IN_CREATE == unix.IN_CREATE || mask&unix.IN_MOVED_TO == unix.IN_MOVED_TO {
|
||||
e.Op |= Create
|
||||
}
|
||||
if mask&unix.IN_DELETE_SELF == unix.IN_DELETE_SELF || mask&unix.IN_DELETE == unix.IN_DELETE {
|
||||
e.Op |= Remove
|
||||
}
|
||||
if mask&unix.IN_MODIFY == unix.IN_MODIFY {
|
||||
e.Op |= Write
|
||||
}
|
||||
if mask&unix.IN_MOVE_SELF == unix.IN_MOVE_SELF || mask&unix.IN_MOVED_FROM == unix.IN_MOVED_FROM {
|
||||
e.Op |= Rename
|
||||
}
|
||||
if mask&unix.IN_ATTRIB == unix.IN_ATTRIB {
|
||||
e.Op |= Chmod
|
||||
}
|
||||
return e
|
||||
}
|
||||
|
|
@ -0,0 +1,187 @@
|
|||
// Copyright 2015 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build linux
|
||||
|
||||
package fsnotify
|
||||
|
||||
import (
|
||||
"errors"
|
||||
|
||||
"golang.org/x/sys/unix"
|
||||
)
|
||||
|
||||
type fdPoller struct {
|
||||
fd int // File descriptor (as returned by the inotify_init() syscall)
|
||||
epfd int // Epoll file descriptor
|
||||
pipe [2]int // Pipe for waking up
|
||||
}
|
||||
|
||||
func emptyPoller(fd int) *fdPoller {
|
||||
poller := new(fdPoller)
|
||||
poller.fd = fd
|
||||
poller.epfd = -1
|
||||
poller.pipe[0] = -1
|
||||
poller.pipe[1] = -1
|
||||
return poller
|
||||
}
|
||||
|
||||
// Create a new inotify poller.
|
||||
// This creates an inotify handler, and an epoll handler.
|
||||
func newFdPoller(fd int) (*fdPoller, error) {
|
||||
var errno error
|
||||
poller := emptyPoller(fd)
|
||||
defer func() {
|
||||
if errno != nil {
|
||||
poller.close()
|
||||
}
|
||||
}()
|
||||
poller.fd = fd
|
||||
|
||||
// Create epoll fd
|
||||
poller.epfd, errno = unix.EpollCreate1(unix.EPOLL_CLOEXEC)
|
||||
if poller.epfd == -1 {
|
||||
return nil, errno
|
||||
}
|
||||
// Create pipe; pipe[0] is the read end, pipe[1] the write end.
|
||||
errno = unix.Pipe2(poller.pipe[:], unix.O_NONBLOCK|unix.O_CLOEXEC)
|
||||
if errno != nil {
|
||||
return nil, errno
|
||||
}
|
||||
|
||||
// Register inotify fd with epoll
|
||||
event := unix.EpollEvent{
|
||||
Fd: int32(poller.fd),
|
||||
Events: unix.EPOLLIN,
|
||||
}
|
||||
errno = unix.EpollCtl(poller.epfd, unix.EPOLL_CTL_ADD, poller.fd, &event)
|
||||
if errno != nil {
|
||||
return nil, errno
|
||||
}
|
||||
|
||||
// Register pipe fd with epoll
|
||||
event = unix.EpollEvent{
|
||||
Fd: int32(poller.pipe[0]),
|
||||
Events: unix.EPOLLIN,
|
||||
}
|
||||
errno = unix.EpollCtl(poller.epfd, unix.EPOLL_CTL_ADD, poller.pipe[0], &event)
|
||||
if errno != nil {
|
||||
return nil, errno
|
||||
}
|
||||
|
||||
return poller, nil
|
||||
}
|
||||
|
||||
// Wait using epoll.
|
||||
// Returns true if something is ready to be read,
|
||||
// false if there is not.
|
||||
func (poller *fdPoller) wait() (bool, error) {
|
||||
// 3 possible events per fd, and 2 fds, makes a maximum of 6 events.
|
||||
// I don't know whether epoll_wait returns the number of events returned,
|
||||
// or the total number of events ready.
|
||||
// I decided to catch both by making the buffer one larger than the maximum.
|
||||
events := make([]unix.EpollEvent, 7)
|
||||
for {
|
||||
n, errno := unix.EpollWait(poller.epfd, events, -1)
|
||||
if n == -1 {
|
||||
if errno == unix.EINTR {
|
||||
continue
|
||||
}
|
||||
return false, errno
|
||||
}
|
||||
if n == 0 {
|
||||
// If there are no events, try again.
|
||||
continue
|
||||
}
|
||||
if n > 6 {
|
||||
// This should never happen. More events were returned than should be possible.
|
||||
return false, errors.New("epoll_wait returned more events than I know what to do with")
|
||||
}
|
||||
ready := events[:n]
|
||||
epollhup := false
|
||||
epollerr := false
|
||||
epollin := false
|
||||
for _, event := range ready {
|
||||
if event.Fd == int32(poller.fd) {
|
||||
if event.Events&unix.EPOLLHUP != 0 {
|
||||
// This should not happen, but if it does, treat it as a wakeup.
|
||||
epollhup = true
|
||||
}
|
||||
if event.Events&unix.EPOLLERR != 0 {
|
||||
// If an error is waiting on the file descriptor, we should pretend
|
||||
// something is ready to read, and let unix.Read pick up the error.
|
||||
epollerr = true
|
||||
}
|
||||
if event.Events&unix.EPOLLIN != 0 {
|
||||
// There is data to read.
|
||||
epollin = true
|
||||
}
|
||||
}
|
||||
if event.Fd == int32(poller.pipe[0]) {
|
||||
if event.Events&unix.EPOLLHUP != 0 {
|
||||
// Write pipe descriptor was closed, by us. This means we're closing down the
|
||||
// watcher, and we should wake up.
|
||||
}
|
||||
if event.Events&unix.EPOLLERR != 0 {
|
||||
// If an error is waiting on the pipe file descriptor.
|
||||
// This is an absolute mystery, and should never ever happen.
|
||||
return false, errors.New("Error on the pipe descriptor.")
|
||||
}
|
||||
if event.Events&unix.EPOLLIN != 0 {
|
||||
// This is a regular wakeup, so we have to clear the buffer.
|
||||
err := poller.clearWake()
|
||||
if err != nil {
|
||||
return false, err
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if epollhup || epollerr || epollin {
|
||||
return true, nil
|
||||
}
|
||||
return false, nil
|
||||
}
|
||||
}
|
||||
|
||||
// Close the write end of the poller.
|
||||
func (poller *fdPoller) wake() error {
|
||||
buf := make([]byte, 1)
|
||||
n, errno := unix.Write(poller.pipe[1], buf)
|
||||
if n == -1 {
|
||||
if errno == unix.EAGAIN {
|
||||
// Buffer is full, poller will wake.
|
||||
return nil
|
||||
}
|
||||
return errno
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (poller *fdPoller) clearWake() error {
|
||||
// You have to be woken up a LOT in order to get to 100!
|
||||
buf := make([]byte, 100)
|
||||
n, errno := unix.Read(poller.pipe[0], buf)
|
||||
if n == -1 {
|
||||
if errno == unix.EAGAIN {
|
||||
// Buffer is empty, someone else cleared our wake.
|
||||
return nil
|
||||
}
|
||||
return errno
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// Close all poller file descriptors, but not the one passed to it.
|
||||
func (poller *fdPoller) close() {
|
||||
if poller.pipe[1] != -1 {
|
||||
unix.Close(poller.pipe[1])
|
||||
}
|
||||
if poller.pipe[0] != -1 {
|
||||
unix.Close(poller.pipe[0])
|
||||
}
|
||||
if poller.epfd != -1 {
|
||||
unix.Close(poller.epfd)
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,521 @@
|
|||
// Copyright 2010 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build freebsd openbsd netbsd dragonfly darwin
|
||||
|
||||
package fsnotify
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"fmt"
|
||||
"io/ioutil"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"golang.org/x/sys/unix"
|
||||
)
|
||||
|
||||
// Watcher watches a set of files, delivering events to a channel.
|
||||
type Watcher struct {
|
||||
Events chan Event
|
||||
Errors chan error
|
||||
done chan struct{} // Channel for sending a "quit message" to the reader goroutine
|
||||
|
||||
kq int // File descriptor (as returned by the kqueue() syscall).
|
||||
|
||||
mu sync.Mutex // Protects access to watcher data
|
||||
watches map[string]int // Map of watched file descriptors (key: path).
|
||||
externalWatches map[string]bool // Map of watches added by user of the library.
|
||||
dirFlags map[string]uint32 // Map of watched directories to fflags used in kqueue.
|
||||
paths map[int]pathInfo // Map file descriptors to path names for processing kqueue events.
|
||||
fileExists map[string]bool // Keep track of if we know this file exists (to stop duplicate create events).
|
||||
isClosed bool // Set to true when Close() is first called
|
||||
}
|
||||
|
||||
type pathInfo struct {
|
||||
name string
|
||||
isDir bool
|
||||
}
|
||||
|
||||
// NewWatcher establishes a new watcher with the underlying OS and begins waiting for events.
|
||||
func NewWatcher() (*Watcher, error) {
|
||||
kq, err := kqueue()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
w := &Watcher{
|
||||
kq: kq,
|
||||
watches: make(map[string]int),
|
||||
dirFlags: make(map[string]uint32),
|
||||
paths: make(map[int]pathInfo),
|
||||
fileExists: make(map[string]bool),
|
||||
externalWatches: make(map[string]bool),
|
||||
Events: make(chan Event),
|
||||
Errors: make(chan error),
|
||||
done: make(chan struct{}),
|
||||
}
|
||||
|
||||
go w.readEvents()
|
||||
return w, nil
|
||||
}
|
||||
|
||||
// Close removes all watches and closes the events channel.
|
||||
func (w *Watcher) Close() error {
|
||||
w.mu.Lock()
|
||||
if w.isClosed {
|
||||
w.mu.Unlock()
|
||||
return nil
|
||||
}
|
||||
w.isClosed = true
|
||||
|
||||
// copy paths to remove while locked
|
||||
var pathsToRemove = make([]string, 0, len(w.watches))
|
||||
for name := range w.watches {
|
||||
pathsToRemove = append(pathsToRemove, name)
|
||||
}
|
||||
w.mu.Unlock()
|
||||
// unlock before calling Remove, which also locks
|
||||
|
||||
for _, name := range pathsToRemove {
|
||||
w.Remove(name)
|
||||
}
|
||||
|
||||
// send a "quit" message to the reader goroutine
|
||||
close(w.done)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Add starts watching the named file or directory (non-recursively).
|
||||
func (w *Watcher) Add(name string) error {
|
||||
w.mu.Lock()
|
||||
w.externalWatches[name] = true
|
||||
w.mu.Unlock()
|
||||
_, err := w.addWatch(name, noteAllEvents)
|
||||
return err
|
||||
}
|
||||
|
||||
// Remove stops watching the the named file or directory (non-recursively).
|
||||
func (w *Watcher) Remove(name string) error {
|
||||
name = filepath.Clean(name)
|
||||
w.mu.Lock()
|
||||
watchfd, ok := w.watches[name]
|
||||
w.mu.Unlock()
|
||||
if !ok {
|
||||
return fmt.Errorf("can't remove non-existent kevent watch for: %s", name)
|
||||
}
|
||||
|
||||
const registerRemove = unix.EV_DELETE
|
||||
if err := register(w.kq, []int{watchfd}, registerRemove, 0); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
unix.Close(watchfd)
|
||||
|
||||
w.mu.Lock()
|
||||
isDir := w.paths[watchfd].isDir
|
||||
delete(w.watches, name)
|
||||
delete(w.paths, watchfd)
|
||||
delete(w.dirFlags, name)
|
||||
w.mu.Unlock()
|
||||
|
||||
// Find all watched paths that are in this directory that are not external.
|
||||
if isDir {
|
||||
var pathsToRemove []string
|
||||
w.mu.Lock()
|
||||
for _, path := range w.paths {
|
||||
wdir, _ := filepath.Split(path.name)
|
||||
if filepath.Clean(wdir) == name {
|
||||
if !w.externalWatches[path.name] {
|
||||
pathsToRemove = append(pathsToRemove, path.name)
|
||||
}
|
||||
}
|
||||
}
|
||||
w.mu.Unlock()
|
||||
for _, name := range pathsToRemove {
|
||||
// Since these are internal, not much sense in propagating error
|
||||
// to the user, as that will just confuse them with an error about
|
||||
// a path they did not explicitly watch themselves.
|
||||
w.Remove(name)
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Watch all events (except NOTE_EXTEND, NOTE_LINK, NOTE_REVOKE)
|
||||
const noteAllEvents = unix.NOTE_DELETE | unix.NOTE_WRITE | unix.NOTE_ATTRIB | unix.NOTE_RENAME
|
||||
|
||||
// keventWaitTime to block on each read from kevent
|
||||
var keventWaitTime = durationToTimespec(100 * time.Millisecond)
|
||||
|
||||
// addWatch adds name to the watched file set.
|
||||
// The flags are interpreted as described in kevent(2).
|
||||
// Returns the real path to the file which was added, if any, which may be different from the one passed in the case of symlinks.
|
||||
func (w *Watcher) addWatch(name string, flags uint32) (string, error) {
|
||||
var isDir bool
|
||||
// Make ./name and name equivalent
|
||||
name = filepath.Clean(name)
|
||||
|
||||
w.mu.Lock()
|
||||
if w.isClosed {
|
||||
w.mu.Unlock()
|
||||
return "", errors.New("kevent instance already closed")
|
||||
}
|
||||
watchfd, alreadyWatching := w.watches[name]
|
||||
// We already have a watch, but we can still override flags.
|
||||
if alreadyWatching {
|
||||
isDir = w.paths[watchfd].isDir
|
||||
}
|
||||
w.mu.Unlock()
|
||||
|
||||
if !alreadyWatching {
|
||||
fi, err := os.Lstat(name)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
// Don't watch sockets.
|
||||
if fi.Mode()&os.ModeSocket == os.ModeSocket {
|
||||
return "", nil
|
||||
}
|
||||
|
||||
// Don't watch named pipes.
|
||||
if fi.Mode()&os.ModeNamedPipe == os.ModeNamedPipe {
|
||||
return "", nil
|
||||
}
|
||||
|
||||
// Follow Symlinks
|
||||
// Unfortunately, Linux can add bogus symlinks to watch list without
|
||||
// issue, and Windows can't do symlinks period (AFAIK). To maintain
|
||||
// consistency, we will act like everything is fine. There will simply
|
||||
// be no file events for broken symlinks.
|
||||
// Hence the returns of nil on errors.
|
||||
if fi.Mode()&os.ModeSymlink == os.ModeSymlink {
|
||||
name, err = filepath.EvalSymlinks(name)
|
||||
if err != nil {
|
||||
return "", nil
|
||||
}
|
||||
|
||||
w.mu.Lock()
|
||||
_, alreadyWatching = w.watches[name]
|
||||
w.mu.Unlock()
|
||||
|
||||
if alreadyWatching {
|
||||
return name, nil
|
||||
}
|
||||
|
||||
fi, err = os.Lstat(name)
|
||||
if err != nil {
|
||||
return "", nil
|
||||
}
|
||||
}
|
||||
|
||||
watchfd, err = unix.Open(name, openMode, 0700)
|
||||
if watchfd == -1 {
|
||||
return "", err
|
||||
}
|
||||
|
||||
isDir = fi.IsDir()
|
||||
}
|
||||
|
||||
const registerAdd = unix.EV_ADD | unix.EV_CLEAR | unix.EV_ENABLE
|
||||
if err := register(w.kq, []int{watchfd}, registerAdd, flags); err != nil {
|
||||
unix.Close(watchfd)
|
||||
return "", err
|
||||
}
|
||||
|
||||
if !alreadyWatching {
|
||||
w.mu.Lock()
|
||||
w.watches[name] = watchfd
|
||||
w.paths[watchfd] = pathInfo{name: name, isDir: isDir}
|
||||
w.mu.Unlock()
|
||||
}
|
||||
|
||||
if isDir {
|
||||
// Watch the directory if it has not been watched before,
|
||||
// or if it was watched before, but perhaps only a NOTE_DELETE (watchDirectoryFiles)
|
||||
w.mu.Lock()
|
||||
|
||||
watchDir := (flags&unix.NOTE_WRITE) == unix.NOTE_WRITE &&
|
||||
(!alreadyWatching || (w.dirFlags[name]&unix.NOTE_WRITE) != unix.NOTE_WRITE)
|
||||
// Store flags so this watch can be updated later
|
||||
w.dirFlags[name] = flags
|
||||
w.mu.Unlock()
|
||||
|
||||
if watchDir {
|
||||
if err := w.watchDirectoryFiles(name); err != nil {
|
||||
return "", err
|
||||
}
|
||||
}
|
||||
}
|
||||
return name, nil
|
||||
}
|
||||
|
||||
// readEvents reads from kqueue and converts the received kevents into
|
||||
// Event values that it sends down the Events channel.
|
||||
func (w *Watcher) readEvents() {
|
||||
eventBuffer := make([]unix.Kevent_t, 10)
|
||||
|
||||
loop:
|
||||
for {
|
||||
// See if there is a message on the "done" channel
|
||||
select {
|
||||
case <-w.done:
|
||||
break loop
|
||||
default:
|
||||
}
|
||||
|
||||
// Get new events
|
||||
kevents, err := read(w.kq, eventBuffer, &keventWaitTime)
|
||||
// EINTR is okay, the syscall was interrupted before timeout expired.
|
||||
if err != nil && err != unix.EINTR {
|
||||
select {
|
||||
case w.Errors <- err:
|
||||
case <-w.done:
|
||||
break loop
|
||||
}
|
||||
continue
|
||||
}
|
||||
|
||||
// Flush the events we received to the Events channel
|
||||
for len(kevents) > 0 {
|
||||
kevent := &kevents[0]
|
||||
watchfd := int(kevent.Ident)
|
||||
mask := uint32(kevent.Fflags)
|
||||
w.mu.Lock()
|
||||
path := w.paths[watchfd]
|
||||
w.mu.Unlock()
|
||||
event := newEvent(path.name, mask)
|
||||
|
||||
if path.isDir && !(event.Op&Remove == Remove) {
|
||||
// Double check to make sure the directory exists. This can happen when
|
||||
// we do a rm -fr on a recursively watched folders and we receive a
|
||||
// modification event first but the folder has been deleted and later
|
||||
// receive the delete event
|
||||
if _, err := os.Lstat(event.Name); os.IsNotExist(err) {
|
||||
// mark is as delete event
|
||||
event.Op |= Remove
|
||||
}
|
||||
}
|
||||
|
||||
if event.Op&Rename == Rename || event.Op&Remove == Remove {
|
||||
w.Remove(event.Name)
|
||||
w.mu.Lock()
|
||||
delete(w.fileExists, event.Name)
|
||||
w.mu.Unlock()
|
||||
}
|
||||
|
||||
if path.isDir && event.Op&Write == Write && !(event.Op&Remove == Remove) {
|
||||
w.sendDirectoryChangeEvents(event.Name)
|
||||
} else {
|
||||
// Send the event on the Events channel.
|
||||
select {
|
||||
case w.Events <- event:
|
||||
case <-w.done:
|
||||
break loop
|
||||
}
|
||||
}
|
||||
|
||||
if event.Op&Remove == Remove {
|
||||
// Look for a file that may have overwritten this.
|
||||
// For example, mv f1 f2 will delete f2, then create f2.
|
||||
if path.isDir {
|
||||
fileDir := filepath.Clean(event.Name)
|
||||
w.mu.Lock()
|
||||
_, found := w.watches[fileDir]
|
||||
w.mu.Unlock()
|
||||
if found {
|
||||
// make sure the directory exists before we watch for changes. When we
|
||||
// do a recursive watch and perform rm -fr, the parent directory might
|
||||
// have gone missing, ignore the missing directory and let the
|
||||
// upcoming delete event remove the watch from the parent directory.
|
||||
if _, err := os.Lstat(fileDir); err == nil {
|
||||
w.sendDirectoryChangeEvents(fileDir)
|
||||
}
|
||||
}
|
||||
} else {
|
||||
filePath := filepath.Clean(event.Name)
|
||||
if fileInfo, err := os.Lstat(filePath); err == nil {
|
||||
w.sendFileCreatedEventIfNew(filePath, fileInfo)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Move to next event
|
||||
kevents = kevents[1:]
|
||||
}
|
||||
}
|
||||
|
||||
// cleanup
|
||||
err := unix.Close(w.kq)
|
||||
if err != nil {
|
||||
// only way the previous loop breaks is if w.done was closed so we need to async send to w.Errors.
|
||||
select {
|
||||
case w.Errors <- err:
|
||||
default:
|
||||
}
|
||||
}
|
||||
close(w.Events)
|
||||
close(w.Errors)
|
||||
}
|
||||
|
||||
// newEvent returns an platform-independent Event based on kqueue Fflags.
|
||||
func newEvent(name string, mask uint32) Event {
|
||||
e := Event{Name: name}
|
||||
if mask&unix.NOTE_DELETE == unix.NOTE_DELETE {
|
||||
e.Op |= Remove
|
||||
}
|
||||
if mask&unix.NOTE_WRITE == unix.NOTE_WRITE {
|
||||
e.Op |= Write
|
||||
}
|
||||
if mask&unix.NOTE_RENAME == unix.NOTE_RENAME {
|
||||
e.Op |= Rename
|
||||
}
|
||||
if mask&unix.NOTE_ATTRIB == unix.NOTE_ATTRIB {
|
||||
e.Op |= Chmod
|
||||
}
|
||||
return e
|
||||
}
|
||||
|
||||
func newCreateEvent(name string) Event {
|
||||
return Event{Name: name, Op: Create}
|
||||
}
|
||||
|
||||
// watchDirectoryFiles to mimic inotify when adding a watch on a directory
|
||||
func (w *Watcher) watchDirectoryFiles(dirPath string) error {
|
||||
// Get all files
|
||||
files, err := ioutil.ReadDir(dirPath)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
for _, fileInfo := range files {
|
||||
filePath := filepath.Join(dirPath, fileInfo.Name())
|
||||
filePath, err = w.internalWatch(filePath, fileInfo)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
w.mu.Lock()
|
||||
w.fileExists[filePath] = true
|
||||
w.mu.Unlock()
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// sendDirectoryEvents searches the directory for newly created files
|
||||
// and sends them over the event channel. This functionality is to have
|
||||
// the BSD version of fsnotify match Linux inotify which provides a
|
||||
// create event for files created in a watched directory.
|
||||
func (w *Watcher) sendDirectoryChangeEvents(dirPath string) {
|
||||
// Get all files
|
||||
files, err := ioutil.ReadDir(dirPath)
|
||||
if err != nil {
|
||||
select {
|
||||
case w.Errors <- err:
|
||||
case <-w.done:
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
// Search for new files
|
||||
for _, fileInfo := range files {
|
||||
filePath := filepath.Join(dirPath, fileInfo.Name())
|
||||
err := w.sendFileCreatedEventIfNew(filePath, fileInfo)
|
||||
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// sendFileCreatedEvent sends a create event if the file isn't already being tracked.
|
||||
func (w *Watcher) sendFileCreatedEventIfNew(filePath string, fileInfo os.FileInfo) (err error) {
|
||||
w.mu.Lock()
|
||||
_, doesExist := w.fileExists[filePath]
|
||||
w.mu.Unlock()
|
||||
if !doesExist {
|
||||
// Send create event
|
||||
select {
|
||||
case w.Events <- newCreateEvent(filePath):
|
||||
case <-w.done:
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
// like watchDirectoryFiles (but without doing another ReadDir)
|
||||
filePath, err = w.internalWatch(filePath, fileInfo)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
w.mu.Lock()
|
||||
w.fileExists[filePath] = true
|
||||
w.mu.Unlock()
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (w *Watcher) internalWatch(name string, fileInfo os.FileInfo) (string, error) {
|
||||
if fileInfo.IsDir() {
|
||||
// mimic Linux providing delete events for subdirectories
|
||||
// but preserve the flags used if currently watching subdirectory
|
||||
w.mu.Lock()
|
||||
flags := w.dirFlags[name]
|
||||
w.mu.Unlock()
|
||||
|
||||
flags |= unix.NOTE_DELETE | unix.NOTE_RENAME
|
||||
return w.addWatch(name, flags)
|
||||
}
|
||||
|
||||
// watch file to mimic Linux inotify
|
||||
return w.addWatch(name, noteAllEvents)
|
||||
}
|
||||
|
||||
// kqueue creates a new kernel event queue and returns a descriptor.
|
||||
func kqueue() (kq int, err error) {
|
||||
kq, err = unix.Kqueue()
|
||||
if kq == -1 {
|
||||
return kq, err
|
||||
}
|
||||
return kq, nil
|
||||
}
|
||||
|
||||
// register events with the queue
|
||||
func register(kq int, fds []int, flags int, fflags uint32) error {
|
||||
changes := make([]unix.Kevent_t, len(fds))
|
||||
|
||||
for i, fd := range fds {
|
||||
// SetKevent converts int to the platform-specific types:
|
||||
unix.SetKevent(&changes[i], fd, unix.EVFILT_VNODE, flags)
|
||||
changes[i].Fflags = fflags
|
||||
}
|
||||
|
||||
// register the events
|
||||
success, err := unix.Kevent(kq, changes, nil, nil)
|
||||
if success == -1 {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// read retrieves pending events, or waits until an event occurs.
|
||||
// A timeout of nil blocks indefinitely, while 0 polls the queue.
|
||||
func read(kq int, events []unix.Kevent_t, timeout *unix.Timespec) ([]unix.Kevent_t, error) {
|
||||
n, err := unix.Kevent(kq, nil, events, timeout)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return events[0:n], nil
|
||||
}
|
||||
|
||||
// durationToTimespec prepares a timeout value
|
||||
func durationToTimespec(d time.Duration) unix.Timespec {
|
||||
return unix.NsecToTimespec(d.Nanoseconds())
|
||||
}
|
||||
|
|
@ -0,0 +1,11 @@
|
|||
// Copyright 2013 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build freebsd openbsd netbsd dragonfly
|
||||
|
||||
package fsnotify
|
||||
|
||||
import "golang.org/x/sys/unix"
|
||||
|
||||
const openMode = unix.O_NONBLOCK | unix.O_RDONLY | unix.O_CLOEXEC
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
// Copyright 2013 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build darwin
|
||||
|
||||
package fsnotify
|
||||
|
||||
import "golang.org/x/sys/unix"
|
||||
|
||||
// note: this constant is not defined on BSD
|
||||
const openMode = unix.O_EVTONLY | unix.O_CLOEXEC
|
||||
|
|
@ -0,0 +1,561 @@
|
|||
// Copyright 2011 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build windows
|
||||
|
||||
package fsnotify
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"fmt"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"runtime"
|
||||
"sync"
|
||||
"syscall"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
// Watcher watches a set of files, delivering events to a channel.
|
||||
type Watcher struct {
|
||||
Events chan Event
|
||||
Errors chan error
|
||||
isClosed bool // Set to true when Close() is first called
|
||||
mu sync.Mutex // Map access
|
||||
port syscall.Handle // Handle to completion port
|
||||
watches watchMap // Map of watches (key: i-number)
|
||||
input chan *input // Inputs to the reader are sent on this channel
|
||||
quit chan chan<- error
|
||||
}
|
||||
|
||||
// NewWatcher establishes a new watcher with the underlying OS and begins waiting for events.
|
||||
func NewWatcher() (*Watcher, error) {
|
||||
port, e := syscall.CreateIoCompletionPort(syscall.InvalidHandle, 0, 0, 0)
|
||||
if e != nil {
|
||||
return nil, os.NewSyscallError("CreateIoCompletionPort", e)
|
||||
}
|
||||
w := &Watcher{
|
||||
port: port,
|
||||
watches: make(watchMap),
|
||||
input: make(chan *input, 1),
|
||||
Events: make(chan Event, 50),
|
||||
Errors: make(chan error),
|
||||
quit: make(chan chan<- error, 1),
|
||||
}
|
||||
go w.readEvents()
|
||||
return w, nil
|
||||
}
|
||||
|
||||
// Close removes all watches and closes the events channel.
|
||||
func (w *Watcher) Close() error {
|
||||
if w.isClosed {
|
||||
return nil
|
||||
}
|
||||
w.isClosed = true
|
||||
|
||||
// Send "quit" message to the reader goroutine
|
||||
ch := make(chan error)
|
||||
w.quit <- ch
|
||||
if err := w.wakeupReader(); err != nil {
|
||||
return err
|
||||
}
|
||||
return <-ch
|
||||
}
|
||||
|
||||
// Add starts watching the named file or directory (non-recursively).
|
||||
func (w *Watcher) Add(name string) error {
|
||||
if w.isClosed {
|
||||
return errors.New("watcher already closed")
|
||||
}
|
||||
in := &input{
|
||||
op: opAddWatch,
|
||||
path: filepath.Clean(name),
|
||||
flags: sysFSALLEVENTS,
|
||||
reply: make(chan error),
|
||||
}
|
||||
w.input <- in
|
||||
if err := w.wakeupReader(); err != nil {
|
||||
return err
|
||||
}
|
||||
return <-in.reply
|
||||
}
|
||||
|
||||
// Remove stops watching the the named file or directory (non-recursively).
|
||||
func (w *Watcher) Remove(name string) error {
|
||||
in := &input{
|
||||
op: opRemoveWatch,
|
||||
path: filepath.Clean(name),
|
||||
reply: make(chan error),
|
||||
}
|
||||
w.input <- in
|
||||
if err := w.wakeupReader(); err != nil {
|
||||
return err
|
||||
}
|
||||
return <-in.reply
|
||||
}
|
||||
|
||||
const (
|
||||
// Options for AddWatch
|
||||
sysFSONESHOT = 0x80000000
|
||||
sysFSONLYDIR = 0x1000000
|
||||
|
||||
// Events
|
||||
sysFSACCESS = 0x1
|
||||
sysFSALLEVENTS = 0xfff
|
||||
sysFSATTRIB = 0x4
|
||||
sysFSCLOSE = 0x18
|
||||
sysFSCREATE = 0x100
|
||||
sysFSDELETE = 0x200
|
||||
sysFSDELETESELF = 0x400
|
||||
sysFSMODIFY = 0x2
|
||||
sysFSMOVE = 0xc0
|
||||
sysFSMOVEDFROM = 0x40
|
||||
sysFSMOVEDTO = 0x80
|
||||
sysFSMOVESELF = 0x800
|
||||
|
||||
// Special events
|
||||
sysFSIGNORED = 0x8000
|
||||
sysFSQOVERFLOW = 0x4000
|
||||
)
|
||||
|
||||
func newEvent(name string, mask uint32) Event {
|
||||
e := Event{Name: name}
|
||||
if mask&sysFSCREATE == sysFSCREATE || mask&sysFSMOVEDTO == sysFSMOVEDTO {
|
||||
e.Op |= Create
|
||||
}
|
||||
if mask&sysFSDELETE == sysFSDELETE || mask&sysFSDELETESELF == sysFSDELETESELF {
|
||||
e.Op |= Remove
|
||||
}
|
||||
if mask&sysFSMODIFY == sysFSMODIFY {
|
||||
e.Op |= Write
|
||||
}
|
||||
if mask&sysFSMOVE == sysFSMOVE || mask&sysFSMOVESELF == sysFSMOVESELF || mask&sysFSMOVEDFROM == sysFSMOVEDFROM {
|
||||
e.Op |= Rename
|
||||
}
|
||||
if mask&sysFSATTRIB == sysFSATTRIB {
|
||||
e.Op |= Chmod
|
||||
}
|
||||
return e
|
||||
}
|
||||
|
||||
const (
|
||||
opAddWatch = iota
|
||||
opRemoveWatch
|
||||
)
|
||||
|
||||
const (
|
||||
provisional uint64 = 1 << (32 + iota)
|
||||
)
|
||||
|
||||
type input struct {
|
||||
op int
|
||||
path string
|
||||
flags uint32
|
||||
reply chan error
|
||||
}
|
||||
|
||||
type inode struct {
|
||||
handle syscall.Handle
|
||||
volume uint32
|
||||
index uint64
|
||||
}
|
||||
|
||||
type watch struct {
|
||||
ov syscall.Overlapped
|
||||
ino *inode // i-number
|
||||
path string // Directory path
|
||||
mask uint64 // Directory itself is being watched with these notify flags
|
||||
names map[string]uint64 // Map of names being watched and their notify flags
|
||||
rename string // Remembers the old name while renaming a file
|
||||
buf [4096]byte
|
||||
}
|
||||
|
||||
type indexMap map[uint64]*watch
|
||||
type watchMap map[uint32]indexMap
|
||||
|
||||
func (w *Watcher) wakeupReader() error {
|
||||
e := syscall.PostQueuedCompletionStatus(w.port, 0, 0, nil)
|
||||
if e != nil {
|
||||
return os.NewSyscallError("PostQueuedCompletionStatus", e)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func getDir(pathname string) (dir string, err error) {
|
||||
attr, e := syscall.GetFileAttributes(syscall.StringToUTF16Ptr(pathname))
|
||||
if e != nil {
|
||||
return "", os.NewSyscallError("GetFileAttributes", e)
|
||||
}
|
||||
if attr&syscall.FILE_ATTRIBUTE_DIRECTORY != 0 {
|
||||
dir = pathname
|
||||
} else {
|
||||
dir, _ = filepath.Split(pathname)
|
||||
dir = filepath.Clean(dir)
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func getIno(path string) (ino *inode, err error) {
|
||||
h, e := syscall.CreateFile(syscall.StringToUTF16Ptr(path),
|
||||
syscall.FILE_LIST_DIRECTORY,
|
||||
syscall.FILE_SHARE_READ|syscall.FILE_SHARE_WRITE|syscall.FILE_SHARE_DELETE,
|
||||
nil, syscall.OPEN_EXISTING,
|
||||
syscall.FILE_FLAG_BACKUP_SEMANTICS|syscall.FILE_FLAG_OVERLAPPED, 0)
|
||||
if e != nil {
|
||||
return nil, os.NewSyscallError("CreateFile", e)
|
||||
}
|
||||
var fi syscall.ByHandleFileInformation
|
||||
if e = syscall.GetFileInformationByHandle(h, &fi); e != nil {
|
||||
syscall.CloseHandle(h)
|
||||
return nil, os.NewSyscallError("GetFileInformationByHandle", e)
|
||||
}
|
||||
ino = &inode{
|
||||
handle: h,
|
||||
volume: fi.VolumeSerialNumber,
|
||||
index: uint64(fi.FileIndexHigh)<<32 | uint64(fi.FileIndexLow),
|
||||
}
|
||||
return ino, nil
|
||||
}
|
||||
|
||||
// Must run within the I/O thread.
|
||||
func (m watchMap) get(ino *inode) *watch {
|
||||
if i := m[ino.volume]; i != nil {
|
||||
return i[ino.index]
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// Must run within the I/O thread.
|
||||
func (m watchMap) set(ino *inode, watch *watch) {
|
||||
i := m[ino.volume]
|
||||
if i == nil {
|
||||
i = make(indexMap)
|
||||
m[ino.volume] = i
|
||||
}
|
||||
i[ino.index] = watch
|
||||
}
|
||||
|
||||
// Must run within the I/O thread.
|
||||
func (w *Watcher) addWatch(pathname string, flags uint64) error {
|
||||
dir, err := getDir(pathname)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if flags&sysFSONLYDIR != 0 && pathname != dir {
|
||||
return nil
|
||||
}
|
||||
ino, err := getIno(dir)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
w.mu.Lock()
|
||||
watchEntry := w.watches.get(ino)
|
||||
w.mu.Unlock()
|
||||
if watchEntry == nil {
|
||||
if _, e := syscall.CreateIoCompletionPort(ino.handle, w.port, 0, 0); e != nil {
|
||||
syscall.CloseHandle(ino.handle)
|
||||
return os.NewSyscallError("CreateIoCompletionPort", e)
|
||||
}
|
||||
watchEntry = &watch{
|
||||
ino: ino,
|
||||
path: dir,
|
||||
names: make(map[string]uint64),
|
||||
}
|
||||
w.mu.Lock()
|
||||
w.watches.set(ino, watchEntry)
|
||||
w.mu.Unlock()
|
||||
flags |= provisional
|
||||
} else {
|
||||
syscall.CloseHandle(ino.handle)
|
||||
}
|
||||
if pathname == dir {
|
||||
watchEntry.mask |= flags
|
||||
} else {
|
||||
watchEntry.names[filepath.Base(pathname)] |= flags
|
||||
}
|
||||
if err = w.startRead(watchEntry); err != nil {
|
||||
return err
|
||||
}
|
||||
if pathname == dir {
|
||||
watchEntry.mask &= ^provisional
|
||||
} else {
|
||||
watchEntry.names[filepath.Base(pathname)] &= ^provisional
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// Must run within the I/O thread.
|
||||
func (w *Watcher) remWatch(pathname string) error {
|
||||
dir, err := getDir(pathname)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
ino, err := getIno(dir)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
w.mu.Lock()
|
||||
watch := w.watches.get(ino)
|
||||
w.mu.Unlock()
|
||||
if watch == nil {
|
||||
return fmt.Errorf("can't remove non-existent watch for: %s", pathname)
|
||||
}
|
||||
if pathname == dir {
|
||||
w.sendEvent(watch.path, watch.mask&sysFSIGNORED)
|
||||
watch.mask = 0
|
||||
} else {
|
||||
name := filepath.Base(pathname)
|
||||
w.sendEvent(filepath.Join(watch.path, name), watch.names[name]&sysFSIGNORED)
|
||||
delete(watch.names, name)
|
||||
}
|
||||
return w.startRead(watch)
|
||||
}
|
||||
|
||||
// Must run within the I/O thread.
|
||||
func (w *Watcher) deleteWatch(watch *watch) {
|
||||
for name, mask := range watch.names {
|
||||
if mask&provisional == 0 {
|
||||
w.sendEvent(filepath.Join(watch.path, name), mask&sysFSIGNORED)
|
||||
}
|
||||
delete(watch.names, name)
|
||||
}
|
||||
if watch.mask != 0 {
|
||||
if watch.mask&provisional == 0 {
|
||||
w.sendEvent(watch.path, watch.mask&sysFSIGNORED)
|
||||
}
|
||||
watch.mask = 0
|
||||
}
|
||||
}
|
||||
|
||||
// Must run within the I/O thread.
|
||||
func (w *Watcher) startRead(watch *watch) error {
|
||||
if e := syscall.CancelIo(watch.ino.handle); e != nil {
|
||||
w.Errors <- os.NewSyscallError("CancelIo", e)
|
||||
w.deleteWatch(watch)
|
||||
}
|
||||
mask := toWindowsFlags(watch.mask)
|
||||
for _, m := range watch.names {
|
||||
mask |= toWindowsFlags(m)
|
||||
}
|
||||
if mask == 0 {
|
||||
if e := syscall.CloseHandle(watch.ino.handle); e != nil {
|
||||
w.Errors <- os.NewSyscallError("CloseHandle", e)
|
||||
}
|
||||
w.mu.Lock()
|
||||
delete(w.watches[watch.ino.volume], watch.ino.index)
|
||||
w.mu.Unlock()
|
||||
return nil
|
||||
}
|
||||
e := syscall.ReadDirectoryChanges(watch.ino.handle, &watch.buf[0],
|
||||
uint32(unsafe.Sizeof(watch.buf)), false, mask, nil, &watch.ov, 0)
|
||||
if e != nil {
|
||||
err := os.NewSyscallError("ReadDirectoryChanges", e)
|
||||
if e == syscall.ERROR_ACCESS_DENIED && watch.mask&provisional == 0 {
|
||||
// Watched directory was probably removed
|
||||
if w.sendEvent(watch.path, watch.mask&sysFSDELETESELF) {
|
||||
if watch.mask&sysFSONESHOT != 0 {
|
||||
watch.mask = 0
|
||||
}
|
||||
}
|
||||
err = nil
|
||||
}
|
||||
w.deleteWatch(watch)
|
||||
w.startRead(watch)
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// readEvents reads from the I/O completion port, converts the
|
||||
// received events into Event objects and sends them via the Events channel.
|
||||
// Entry point to the I/O thread.
|
||||
func (w *Watcher) readEvents() {
|
||||
var (
|
||||
n, key uint32
|
||||
ov *syscall.Overlapped
|
||||
)
|
||||
runtime.LockOSThread()
|
||||
|
||||
for {
|
||||
e := syscall.GetQueuedCompletionStatus(w.port, &n, &key, &ov, syscall.INFINITE)
|
||||
watch := (*watch)(unsafe.Pointer(ov))
|
||||
|
||||
if watch == nil {
|
||||
select {
|
||||
case ch := <-w.quit:
|
||||
w.mu.Lock()
|
||||
var indexes []indexMap
|
||||
for _, index := range w.watches {
|
||||
indexes = append(indexes, index)
|
||||
}
|
||||
w.mu.Unlock()
|
||||
for _, index := range indexes {
|
||||
for _, watch := range index {
|
||||
w.deleteWatch(watch)
|
||||
w.startRead(watch)
|
||||
}
|
||||
}
|
||||
var err error
|
||||
if e := syscall.CloseHandle(w.port); e != nil {
|
||||
err = os.NewSyscallError("CloseHandle", e)
|
||||
}
|
||||
close(w.Events)
|
||||
close(w.Errors)
|
||||
ch <- err
|
||||
return
|
||||
case in := <-w.input:
|
||||
switch in.op {
|
||||
case opAddWatch:
|
||||
in.reply <- w.addWatch(in.path, uint64(in.flags))
|
||||
case opRemoveWatch:
|
||||
in.reply <- w.remWatch(in.path)
|
||||
}
|
||||
default:
|
||||
}
|
||||
continue
|
||||
}
|
||||
|
||||
switch e {
|
||||
case syscall.ERROR_MORE_DATA:
|
||||
if watch == nil {
|
||||
w.Errors <- errors.New("ERROR_MORE_DATA has unexpectedly null lpOverlapped buffer")
|
||||
} else {
|
||||
// The i/o succeeded but the buffer is full.
|
||||
// In theory we should be building up a full packet.
|
||||
// In practice we can get away with just carrying on.
|
||||
n = uint32(unsafe.Sizeof(watch.buf))
|
||||
}
|
||||
case syscall.ERROR_ACCESS_DENIED:
|
||||
// Watched directory was probably removed
|
||||
w.sendEvent(watch.path, watch.mask&sysFSDELETESELF)
|
||||
w.deleteWatch(watch)
|
||||
w.startRead(watch)
|
||||
continue
|
||||
case syscall.ERROR_OPERATION_ABORTED:
|
||||
// CancelIo was called on this handle
|
||||
continue
|
||||
default:
|
||||
w.Errors <- os.NewSyscallError("GetQueuedCompletionPort", e)
|
||||
continue
|
||||
case nil:
|
||||
}
|
||||
|
||||
var offset uint32
|
||||
for {
|
||||
if n == 0 {
|
||||
w.Events <- newEvent("", sysFSQOVERFLOW)
|
||||
w.Errors <- errors.New("short read in readEvents()")
|
||||
break
|
||||
}
|
||||
|
||||
// Point "raw" to the event in the buffer
|
||||
raw := (*syscall.FileNotifyInformation)(unsafe.Pointer(&watch.buf[offset]))
|
||||
buf := (*[syscall.MAX_PATH]uint16)(unsafe.Pointer(&raw.FileName))
|
||||
name := syscall.UTF16ToString(buf[:raw.FileNameLength/2])
|
||||
fullname := filepath.Join(watch.path, name)
|
||||
|
||||
var mask uint64
|
||||
switch raw.Action {
|
||||
case syscall.FILE_ACTION_REMOVED:
|
||||
mask = sysFSDELETESELF
|
||||
case syscall.FILE_ACTION_MODIFIED:
|
||||
mask = sysFSMODIFY
|
||||
case syscall.FILE_ACTION_RENAMED_OLD_NAME:
|
||||
watch.rename = name
|
||||
case syscall.FILE_ACTION_RENAMED_NEW_NAME:
|
||||
if watch.names[watch.rename] != 0 {
|
||||
watch.names[name] |= watch.names[watch.rename]
|
||||
delete(watch.names, watch.rename)
|
||||
mask = sysFSMOVESELF
|
||||
}
|
||||
}
|
||||
|
||||
sendNameEvent := func() {
|
||||
if w.sendEvent(fullname, watch.names[name]&mask) {
|
||||
if watch.names[name]&sysFSONESHOT != 0 {
|
||||
delete(watch.names, name)
|
||||
}
|
||||
}
|
||||
}
|
||||
if raw.Action != syscall.FILE_ACTION_RENAMED_NEW_NAME {
|
||||
sendNameEvent()
|
||||
}
|
||||
if raw.Action == syscall.FILE_ACTION_REMOVED {
|
||||
w.sendEvent(fullname, watch.names[name]&sysFSIGNORED)
|
||||
delete(watch.names, name)
|
||||
}
|
||||
if w.sendEvent(fullname, watch.mask&toFSnotifyFlags(raw.Action)) {
|
||||
if watch.mask&sysFSONESHOT != 0 {
|
||||
watch.mask = 0
|
||||
}
|
||||
}
|
||||
if raw.Action == syscall.FILE_ACTION_RENAMED_NEW_NAME {
|
||||
fullname = filepath.Join(watch.path, watch.rename)
|
||||
sendNameEvent()
|
||||
}
|
||||
|
||||
// Move to the next event in the buffer
|
||||
if raw.NextEntryOffset == 0 {
|
||||
break
|
||||
}
|
||||
offset += raw.NextEntryOffset
|
||||
|
||||
// Error!
|
||||
if offset >= n {
|
||||
w.Errors <- errors.New("Windows system assumed buffer larger than it is, events have likely been missed.")
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
if err := w.startRead(watch); err != nil {
|
||||
w.Errors <- err
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (w *Watcher) sendEvent(name string, mask uint64) bool {
|
||||
if mask == 0 {
|
||||
return false
|
||||
}
|
||||
event := newEvent(name, uint32(mask))
|
||||
select {
|
||||
case ch := <-w.quit:
|
||||
w.quit <- ch
|
||||
case w.Events <- event:
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
func toWindowsFlags(mask uint64) uint32 {
|
||||
var m uint32
|
||||
if mask&sysFSACCESS != 0 {
|
||||
m |= syscall.FILE_NOTIFY_CHANGE_LAST_ACCESS
|
||||
}
|
||||
if mask&sysFSMODIFY != 0 {
|
||||
m |= syscall.FILE_NOTIFY_CHANGE_LAST_WRITE
|
||||
}
|
||||
if mask&sysFSATTRIB != 0 {
|
||||
m |= syscall.FILE_NOTIFY_CHANGE_ATTRIBUTES
|
||||
}
|
||||
if mask&(sysFSMOVE|sysFSCREATE|sysFSDELETE) != 0 {
|
||||
m |= syscall.FILE_NOTIFY_CHANGE_FILE_NAME | syscall.FILE_NOTIFY_CHANGE_DIR_NAME
|
||||
}
|
||||
return m
|
||||
}
|
||||
|
||||
func toFSnotifyFlags(action uint32) uint64 {
|
||||
switch action {
|
||||
case syscall.FILE_ACTION_ADDED:
|
||||
return sysFSCREATE
|
||||
case syscall.FILE_ACTION_REMOVED:
|
||||
return sysFSDELETE
|
||||
case syscall.FILE_ACTION_MODIFIED:
|
||||
return sysFSMODIFY
|
||||
case syscall.FILE_ACTION_RENAMED_OLD_NAME:
|
||||
return sysFSMOVEDFROM
|
||||
case syscall.FILE_ACTION_RENAMED_NEW_NAME:
|
||||
return sysFSMOVEDTO
|
||||
}
|
||||
return 0
|
||||
}
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
.idea
|
||||
*.sw?
|
||||
.vscode
|
||||
|
|
@ -0,0 +1,305 @@
|
|||
# Changelog
|
||||
|
||||
## v5.0.5 (2021-10-27)
|
||||
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v5.0.4...v5.0.5
|
||||
|
||||
|
||||
## v5.0.4 (2021-08-29)
|
||||
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v5.0.3...v5.0.4
|
||||
|
||||
|
||||
## v5.0.3 (2021-04-29)
|
||||
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v5.0.2...v5.0.3
|
||||
|
||||
|
||||
## v5.0.2 (2021-03-25)
|
||||
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v5.0.1...v5.0.2
|
||||
|
||||
|
||||
## v5.0.1 (2021-03-10)
|
||||
|
||||
- Small improvements
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v5.0.0...v5.0.1
|
||||
|
||||
|
||||
## v5.0.0 (2021-02-27)
|
||||
|
||||
- chi v5, `github.com/go-chi/chi/v5` introduces the adoption of Go's SIV to adhere to the current state-of-the-tools in Go.
|
||||
- chi v1.5.x did not work out as planned, as the Go tooling is too powerful and chi's adoption is too wide.
|
||||
The most responsible thing to do for everyone's benefit is to just release v5 with SIV, so I present to you all,
|
||||
chi v5 at `github.com/go-chi/chi/v5`. I hope someday the developer experience and ergonomics I've been seeking
|
||||
will still come to fruition in some form, see https://github.com/golang/go/issues/44550
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v1.5.4...v5.0.0
|
||||
|
||||
|
||||
## v1.5.4 (2021-02-27)
|
||||
|
||||
- Undo prior retraction in v1.5.3 as we prepare for v5.0.0 release
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v1.5.3...v1.5.4
|
||||
|
||||
|
||||
## v1.5.3 (2021-02-21)
|
||||
|
||||
- Update go.mod to go 1.16 with new retract directive marking all versions without prior go.mod support
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v1.5.2...v1.5.3
|
||||
|
||||
|
||||
## v1.5.2 (2021-02-10)
|
||||
|
||||
- Reverting allocation optimization as a precaution as go test -race fails.
|
||||
- Minor improvements, see history below
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v1.5.1...v1.5.2
|
||||
|
||||
|
||||
## v1.5.1 (2020-12-06)
|
||||
|
||||
- Performance improvement: removing 1 allocation by foregoing context.WithValue, thank you @bouk for
|
||||
your contribution (https://github.com/go-chi/chi/pull/555). Note: new benchmarks posted in README.
|
||||
- `middleware.CleanPath`: new middleware that clean's request path of double slashes
|
||||
- deprecate & remove `chi.ServerBaseContext` in favour of stdlib `http.Server#BaseContext`
|
||||
- plus other tiny improvements, see full commit history below
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v4.1.2...v1.5.1
|
||||
|
||||
|
||||
## v1.5.0 (2020-11-12) - now with go.mod support
|
||||
|
||||
`chi` dates back to 2016 with it's original implementation as one of the first routers to adopt the newly introduced
|
||||
context.Context api to the stdlib -- set out to design a router that is faster, more modular and simpler than anything
|
||||
else out there -- while not introducing any custom handler types or dependencies. Today, `chi` still has zero dependencies,
|
||||
and in many ways is future proofed from changes, given it's minimal nature. Between versions, chi's iterations have been very
|
||||
incremental, with the architecture and api being the same today as it was originally designed in 2016. For this reason it
|
||||
makes chi a pretty easy project to maintain, as well thanks to the many amazing community contributions over the years
|
||||
to who all help make chi better (total of 86 contributors to date -- thanks all!).
|
||||
|
||||
Chi has been an labour of love, art and engineering, with the goals to offer beautiful ergonomics, flexibility, performance
|
||||
and simplicity when building HTTP services with Go. I've strived to keep the router very minimal in surface area / code size,
|
||||
and always improving the code wherever possible -- and as of today the `chi` package is just 1082 lines of code (not counting
|
||||
middlewares, which are all optional). As well, I don't have the exact metrics, but from my analysis and email exchanges from
|
||||
companies and developers, chi is used by thousands of projects around the world -- thank you all as there is no better form of
|
||||
joy for me than to have art I had started be helpful and enjoyed by others. And of course I use chi in all of my own projects too :)
|
||||
|
||||
For me, the asthetics of chi's code and usage are very important. With the introduction of Go's module support
|
||||
(which I'm a big fan of), chi's past versioning scheme choice to v2, v3 and v4 would mean I'd require the import path
|
||||
of "github.com/go-chi/chi/v4", leading to the lengthy discussion at https://github.com/go-chi/chi/issues/462.
|
||||
Haha, to some, you may be scratching your head why I've spent > 1 year stalling to adopt "/vXX" convention in the import
|
||||
path -- which isn't horrible in general -- but for chi, I'm unable to accept it as I strive for perfection in it's API design,
|
||||
aesthetics and simplicity. It just doesn't feel good to me given chi's simple nature -- I do not foresee a "v5" or "v6",
|
||||
and upgrading between versions in the future will also be just incremental.
|
||||
|
||||
I do understand versioning is a part of the API design as well, which is why the solution for a while has been to "do nothing",
|
||||
as Go supports both old and new import paths with/out go.mod. However, now that Go module support has had time to iron out kinks and
|
||||
is adopted everywhere, it's time for chi to get with the times. Luckily, I've discovered a path forward that will make me happy,
|
||||
while also not breaking anyone's app who adopted a prior versioning from tags in v2/v3/v4. I've made an experimental release of
|
||||
v1.5.0 with go.mod silently, and tested it with new and old projects, to ensure the developer experience is preserved, and it's
|
||||
largely unnoticed. Fortunately, Go's toolchain will check the tags of a repo and consider the "latest" tag the one with go.mod.
|
||||
However, you can still request a specific older tag such as v4.1.2, and everything will "just work". But new users can just
|
||||
`go get github.com/go-chi/chi` or `go get github.com/go-chi/chi@latest` and they will get the latest version which contains
|
||||
go.mod support, which is v1.5.0+. `chi` will not change very much over the years, just like it hasn't changed much from 4 years ago.
|
||||
Therefore, we will stay on v1.x from here on, starting from v1.5.0. Any breaking changes will bump a "minor" release and
|
||||
backwards-compatible improvements/fixes will bump a "tiny" release.
|
||||
|
||||
For existing projects who want to upgrade to the latest go.mod version, run: `go get -u github.com/go-chi/chi@v1.5.0`,
|
||||
which will get you on the go.mod version line (as Go's mod cache may still remember v4.x). Brand new systems can run
|
||||
`go get -u github.com/go-chi/chi` or `go get -u github.com/go-chi/chi@latest` to install chi, which will install v1.5.0+
|
||||
built with go.mod support.
|
||||
|
||||
My apologies to the developers who will disagree with the decisions above, but, hope you'll try it and see it's a very
|
||||
minor request which is backwards compatible and won't break your existing installations.
|
||||
|
||||
Cheers all, happy coding!
|
||||
|
||||
|
||||
---
|
||||
|
||||
|
||||
## v4.1.2 (2020-06-02)
|
||||
|
||||
- fix that handles MethodNotAllowed with path variables, thank you @caseyhadden for your contribution
|
||||
- fix to replace nested wildcards correctly in RoutePattern, thank you @@unmultimedio for your contribution
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v4.1.1...v4.1.2
|
||||
|
||||
|
||||
## v4.1.1 (2020-04-16)
|
||||
|
||||
- fix for issue https://github.com/go-chi/chi/issues/411 which allows for overlapping regexp
|
||||
route to the correct handler through a recursive tree search, thanks to @Jahaja for the PR/fix!
|
||||
- new middleware.RouteHeaders as a simple router for request headers with wildcard support
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v4.1.0...v4.1.1
|
||||
|
||||
|
||||
## v4.1.0 (2020-04-1)
|
||||
|
||||
- middleware.LogEntry: Write method on interface now passes the response header
|
||||
and an extra interface type useful for custom logger implementations.
|
||||
- middleware.WrapResponseWriter: minor fix
|
||||
- middleware.Recoverer: a bit prettier
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v4.0.4...v4.1.0
|
||||
|
||||
## v4.0.4 (2020-03-24)
|
||||
|
||||
- middleware.Recoverer: new pretty stack trace printing (https://github.com/go-chi/chi/pull/496)
|
||||
- a few minor improvements and fixes
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v4.0.3...v4.0.4
|
||||
|
||||
|
||||
## v4.0.3 (2020-01-09)
|
||||
|
||||
- core: fix regexp routing to include default value when param is not matched
|
||||
- middleware: rewrite of middleware.Compress
|
||||
- middleware: suppress http.ErrAbortHandler in middleware.Recoverer
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v4.0.2...v4.0.3
|
||||
|
||||
|
||||
## v4.0.2 (2019-02-26)
|
||||
|
||||
- Minor fixes
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v4.0.1...v4.0.2
|
||||
|
||||
|
||||
## v4.0.1 (2019-01-21)
|
||||
|
||||
- Fixes issue with compress middleware: #382 #385
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v4.0.0...v4.0.1
|
||||
|
||||
|
||||
## v4.0.0 (2019-01-10)
|
||||
|
||||
- chi v4 requires Go 1.10.3+ (or Go 1.9.7+) - we have deprecated support for Go 1.7 and 1.8
|
||||
- router: respond with 404 on router with no routes (#362)
|
||||
- router: additional check to ensure wildcard is at the end of a url pattern (#333)
|
||||
- middleware: deprecate use of http.CloseNotifier (#347)
|
||||
- middleware: fix RedirectSlashes to include query params on redirect (#334)
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v3.3.4...v4.0.0
|
||||
|
||||
|
||||
## v3.3.4 (2019-01-07)
|
||||
|
||||
- Minor middleware improvements. No changes to core library/router. Moving v3 into its
|
||||
- own branch as a version of chi for Go 1.7, 1.8, 1.9, 1.10, 1.11
|
||||
- History of changes: see https://github.com/go-chi/chi/compare/v3.3.3...v3.3.4
|
||||
|
||||
|
||||
## v3.3.3 (2018-08-27)
|
||||
|
||||
- Minor release
|
||||
- See https://github.com/go-chi/chi/compare/v3.3.2...v3.3.3
|
||||
|
||||
|
||||
## v3.3.2 (2017-12-22)
|
||||
|
||||
- Support to route trailing slashes on mounted sub-routers (#281)
|
||||
- middleware: new `ContentCharset` to check matching charsets. Thank you
|
||||
@csucu for your community contribution!
|
||||
|
||||
|
||||
## v3.3.1 (2017-11-20)
|
||||
|
||||
- middleware: new `AllowContentType` handler for explicit whitelist of accepted request Content-Types
|
||||
- middleware: new `SetHeader` handler for short-hand middleware to set a response header key/value
|
||||
- Minor bug fixes
|
||||
|
||||
|
||||
## v3.3.0 (2017-10-10)
|
||||
|
||||
- New chi.RegisterMethod(method) to add support for custom HTTP methods, see _examples/custom-method for usage
|
||||
- Deprecated LINK and UNLINK methods from the default list, please use `chi.RegisterMethod("LINK")` and `chi.RegisterMethod("UNLINK")` in an `init()` function
|
||||
|
||||
|
||||
## v3.2.1 (2017-08-31)
|
||||
|
||||
- Add new `Match(rctx *Context, method, path string) bool` method to `Routes` interface
|
||||
and `Mux`. Match searches the mux's routing tree for a handler that matches the method/path
|
||||
- Add new `RouteMethod` to `*Context`
|
||||
- Add new `Routes` pointer to `*Context`
|
||||
- Add new `middleware.GetHead` to route missing HEAD requests to GET handler
|
||||
- Updated benchmarks (see README)
|
||||
|
||||
|
||||
## v3.1.5 (2017-08-02)
|
||||
|
||||
- Setup golint and go vet for the project
|
||||
- As per golint, we've redefined `func ServerBaseContext(h http.Handler, baseCtx context.Context) http.Handler`
|
||||
to `func ServerBaseContext(baseCtx context.Context, h http.Handler) http.Handler`
|
||||
|
||||
|
||||
## v3.1.0 (2017-07-10)
|
||||
|
||||
- Fix a few minor issues after v3 release
|
||||
- Move `docgen` sub-pkg to https://github.com/go-chi/docgen
|
||||
- Move `render` sub-pkg to https://github.com/go-chi/render
|
||||
- Add new `URLFormat` handler to chi/middleware sub-pkg to make working with url mime
|
||||
suffixes easier, ie. parsing `/articles/1.json` and `/articles/1.xml`. See comments in
|
||||
https://github.com/go-chi/chi/blob/master/middleware/url_format.go for example usage.
|
||||
|
||||
|
||||
## v3.0.0 (2017-06-21)
|
||||
|
||||
- Major update to chi library with many exciting updates, but also some *breaking changes*
|
||||
- URL parameter syntax changed from `/:id` to `/{id}` for even more flexible routing, such as
|
||||
`/articles/{month}-{day}-{year}-{slug}`, `/articles/{id}`, and `/articles/{id}.{ext}` on the
|
||||
same router
|
||||
- Support for regexp for routing patterns, in the form of `/{paramKey:regExp}` for example:
|
||||
`r.Get("/articles/{name:[a-z]+}", h)` and `chi.URLParam(r, "name")`
|
||||
- Add `Method` and `MethodFunc` to `chi.Router` to allow routing definitions such as
|
||||
`r.Method("GET", "/", h)` which provides a cleaner interface for custom handlers like
|
||||
in `_examples/custom-handler`
|
||||
- Deprecating `mux#FileServer` helper function. Instead, we encourage users to create their
|
||||
own using file handler with the stdlib, see `_examples/fileserver` for an example
|
||||
- Add support for LINK/UNLINK http methods via `r.Method()` and `r.MethodFunc()`
|
||||
- Moved the chi project to its own organization, to allow chi-related community packages to
|
||||
be easily discovered and supported, at: https://github.com/go-chi
|
||||
- *NOTE:* please update your import paths to `"github.com/go-chi/chi"`
|
||||
- *NOTE:* chi v2 is still available at https://github.com/go-chi/chi/tree/v2
|
||||
|
||||
|
||||
## v2.1.0 (2017-03-30)
|
||||
|
||||
- Minor improvements and update to the chi core library
|
||||
- Introduced a brand new `chi/render` sub-package to complete the story of building
|
||||
APIs to offer a pattern for managing well-defined request / response payloads. Please
|
||||
check out the updated `_examples/rest` example for how it works.
|
||||
- Added `MethodNotAllowed(h http.HandlerFunc)` to chi.Router interface
|
||||
|
||||
|
||||
## v2.0.0 (2017-01-06)
|
||||
|
||||
- After many months of v2 being in an RC state with many companies and users running it in
|
||||
production, the inclusion of some improvements to the middlewares, we are very pleased to
|
||||
announce v2.0.0 of chi.
|
||||
|
||||
|
||||
## v2.0.0-rc1 (2016-07-26)
|
||||
|
||||
- Huge update! chi v2 is a large refactor targetting Go 1.7+. As of Go 1.7, the popular
|
||||
community `"net/context"` package has been included in the standard library as `"context"` and
|
||||
utilized by `"net/http"` and `http.Request` to managing deadlines, cancelation signals and other
|
||||
request-scoped values. We're very excited about the new context addition and are proud to
|
||||
introduce chi v2, a minimal and powerful routing package for building large HTTP services,
|
||||
with zero external dependencies. Chi focuses on idiomatic design and encourages the use of
|
||||
stdlib HTTP handlers and middlwares.
|
||||
- chi v2 deprecates its `chi.Handler` interface and requires `http.Handler` or `http.HandlerFunc`
|
||||
- chi v2 stores URL routing parameters and patterns in the standard request context: `r.Context()`
|
||||
- chi v2 lower-level routing context is accessible by `chi.RouteContext(r.Context()) *chi.Context`,
|
||||
which provides direct access to URL routing parameters, the routing path and the matching
|
||||
routing patterns.
|
||||
- Users upgrading from chi v1 to v2, need to:
|
||||
1. Update the old chi.Handler signature, `func(ctx context.Context, w http.ResponseWriter, r *http.Request)` to
|
||||
the standard http.Handler: `func(w http.ResponseWriter, r *http.Request)`
|
||||
2. Use `chi.URLParam(r *http.Request, paramKey string) string`
|
||||
or `URLParamFromCtx(ctx context.Context, paramKey string) string` to access a url parameter value
|
||||
|
||||
|
||||
## v1.0.0 (2016-07-01)
|
||||
|
||||
- Released chi v1 stable https://github.com/go-chi/chi/tree/v1.0.0 for Go 1.6 and older.
|
||||
|
||||
|
||||
## v0.9.0 (2016-03-31)
|
||||
|
||||
- Reuse context objects via sync.Pool for zero-allocation routing [#33](https://github.com/go-chi/chi/pull/33)
|
||||
- BREAKING NOTE: due to subtle API changes, previously `chi.URLParams(ctx)["id"]` used to access url parameters
|
||||
has changed to: `chi.URLParam(ctx, "id")`
|
||||
|
|
@ -0,0 +1,31 @@
|
|||
# Contributing
|
||||
|
||||
## Prerequisites
|
||||
|
||||
1. [Install Go][go-install].
|
||||
2. Download the sources and switch the working directory:
|
||||
|
||||
```bash
|
||||
go get -u -d github.com/go-chi/chi
|
||||
cd $GOPATH/src/github.com/go-chi/chi
|
||||
```
|
||||
|
||||
## Submitting a Pull Request
|
||||
|
||||
A typical workflow is:
|
||||
|
||||
1. [Fork the repository.][fork] [This tip maybe also helpful.][go-fork-tip]
|
||||
2. [Create a topic branch.][branch]
|
||||
3. Add tests for your change.
|
||||
4. Run `go test`. If your tests pass, return to the step 3.
|
||||
5. Implement the change and ensure the steps from the previous step pass.
|
||||
6. Run `goimports -w .`, to ensure the new code conforms to Go formatting guideline.
|
||||
7. [Add, commit and push your changes.][git-help]
|
||||
8. [Submit a pull request.][pull-req]
|
||||
|
||||
[go-install]: https://golang.org/doc/install
|
||||
[go-fork-tip]: http://blog.campoy.cat/2014/03/github-and-go-forking-pull-requests-and.html
|
||||
[fork]: https://help.github.com/articles/fork-a-repo
|
||||
[branch]: http://learn.github.com/p/branching.html
|
||||
[git-help]: https://guides.github.com
|
||||
[pull-req]: https://help.github.com/articles/using-pull-requests
|
||||
|
|
@ -0,0 +1,20 @@
|
|||
Copyright (c) 2015-present Peter Kieltyka (https://github.com/pkieltyka), Google Inc.
|
||||
|
||||
MIT License
|
||||
|
||||
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.
|
||||
|
|
@ -0,0 +1,18 @@
|
|||
all:
|
||||
@echo "**********************************************************"
|
||||
@echo "** chi build tool **"
|
||||
@echo "**********************************************************"
|
||||
|
||||
|
||||
test:
|
||||
go clean -testcache && $(MAKE) test-router && $(MAKE) test-middleware
|
||||
|
||||
test-router:
|
||||
go test -race -v .
|
||||
|
||||
test-middleware:
|
||||
go test -race -v ./middleware
|
||||
|
||||
.PHONY: docs
|
||||
docs:
|
||||
npx docsify-cli serve ./docs
|
||||
|
|
@ -0,0 +1,500 @@
|
|||
# <img alt="chi" src="https://cdn.rawgit.com/go-chi/chi/master/_examples/chi.svg" width="220" />
|
||||
|
||||
|
||||
[![GoDoc Widget]][GoDoc] [![Travis Widget]][Travis]
|
||||
|
||||
`chi` is a lightweight, idiomatic and composable router for building Go HTTP services. It's
|
||||
especially good at helping you write large REST API services that are kept maintainable as your
|
||||
project grows and changes. `chi` is built on the new `context` package introduced in Go 1.7 to
|
||||
handle signaling, cancelation and request-scoped values across a handler chain.
|
||||
|
||||
The focus of the project has been to seek out an elegant and comfortable design for writing
|
||||
REST API servers, written during the development of the Pressly API service that powers our
|
||||
public API service, which in turn powers all of our client-side applications.
|
||||
|
||||
The key considerations of chi's design are: project structure, maintainability, standard http
|
||||
handlers (stdlib-only), developer productivity, and deconstructing a large system into many small
|
||||
parts. The core router `github.com/go-chi/chi` is quite small (less than 1000 LOC), but we've also
|
||||
included some useful/optional subpackages: [middleware](/middleware), [render](https://github.com/go-chi/render)
|
||||
and [docgen](https://github.com/go-chi/docgen). We hope you enjoy it too!
|
||||
|
||||
## Install
|
||||
|
||||
`go get -u github.com/go-chi/chi/v5`
|
||||
|
||||
|
||||
## Features
|
||||
|
||||
* **Lightweight** - cloc'd in ~1000 LOC for the chi router
|
||||
* **Fast** - yes, see [benchmarks](#benchmarks)
|
||||
* **100% compatible with net/http** - use any http or middleware pkg in the ecosystem that is also compatible with `net/http`
|
||||
* **Designed for modular/composable APIs** - middlewares, inline middlewares, route groups and sub-router mounting
|
||||
* **Context control** - built on new `context` package, providing value chaining, cancellations and timeouts
|
||||
* **Robust** - in production at Pressly, CloudFlare, Heroku, 99Designs, and many others (see [discussion](https://github.com/go-chi/chi/issues/91))
|
||||
* **Doc generation** - `docgen` auto-generates routing documentation from your source to JSON or Markdown
|
||||
* **Go.mod support** - as of v5, go.mod support (see [CHANGELOG](https://github.com/go-chi/chi/blob/master/CHANGELOG.md))
|
||||
* **No external dependencies** - plain ol' Go stdlib + net/http
|
||||
|
||||
|
||||
## Examples
|
||||
|
||||
See [_examples/](https://github.com/go-chi/chi/blob/master/_examples/) for a variety of examples.
|
||||
|
||||
|
||||
**As easy as:**
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
|
||||
"github.com/go-chi/chi/v5"
|
||||
"github.com/go-chi/chi/v5/middleware"
|
||||
)
|
||||
|
||||
func main() {
|
||||
r := chi.NewRouter()
|
||||
r.Use(middleware.Logger)
|
||||
r.Get("/", func(w http.ResponseWriter, r *http.Request) {
|
||||
w.Write([]byte("welcome"))
|
||||
})
|
||||
http.ListenAndServe(":3000", r)
|
||||
}
|
||||
```
|
||||
|
||||
**REST Preview:**
|
||||
|
||||
Here is a little preview of how routing looks like with chi. Also take a look at the generated routing docs
|
||||
in JSON ([routes.json](https://github.com/go-chi/chi/blob/master/_examples/rest/routes.json)) and in
|
||||
Markdown ([routes.md](https://github.com/go-chi/chi/blob/master/_examples/rest/routes.md)).
|
||||
|
||||
I highly recommend reading the source of the [examples](https://github.com/go-chi/chi/blob/master/_examples/) listed
|
||||
above, they will show you all the features of chi and serve as a good form of documentation.
|
||||
|
||||
```go
|
||||
import (
|
||||
//...
|
||||
"context"
|
||||
"github.com/go-chi/chi/v5"
|
||||
"github.com/go-chi/chi/v5/middleware"
|
||||
)
|
||||
|
||||
func main() {
|
||||
r := chi.NewRouter()
|
||||
|
||||
// A good base middleware stack
|
||||
r.Use(middleware.RequestID)
|
||||
r.Use(middleware.RealIP)
|
||||
r.Use(middleware.Logger)
|
||||
r.Use(middleware.Recoverer)
|
||||
|
||||
// Set a timeout value on the request context (ctx), that will signal
|
||||
// through ctx.Done() that the request has timed out and further
|
||||
// processing should be stopped.
|
||||
r.Use(middleware.Timeout(60 * time.Second))
|
||||
|
||||
r.Get("/", func(w http.ResponseWriter, r *http.Request) {
|
||||
w.Write([]byte("hi"))
|
||||
})
|
||||
|
||||
// RESTy routes for "articles" resource
|
||||
r.Route("/articles", func(r chi.Router) {
|
||||
r.With(paginate).Get("/", listArticles) // GET /articles
|
||||
r.With(paginate).Get("/{month}-{day}-{year}", listArticlesByDate) // GET /articles/01-16-2017
|
||||
|
||||
r.Post("/", createArticle) // POST /articles
|
||||
r.Get("/search", searchArticles) // GET /articles/search
|
||||
|
||||
// Regexp url parameters:
|
||||
r.Get("/{articleSlug:[a-z-]+}", getArticleBySlug) // GET /articles/home-is-toronto
|
||||
|
||||
// Subrouters:
|
||||
r.Route("/{articleID}", func(r chi.Router) {
|
||||
r.Use(ArticleCtx)
|
||||
r.Get("/", getArticle) // GET /articles/123
|
||||
r.Put("/", updateArticle) // PUT /articles/123
|
||||
r.Delete("/", deleteArticle) // DELETE /articles/123
|
||||
})
|
||||
})
|
||||
|
||||
// Mount the admin sub-router
|
||||
r.Mount("/admin", adminRouter())
|
||||
|
||||
http.ListenAndServe(":3333", r)
|
||||
}
|
||||
|
||||
func ArticleCtx(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
articleID := chi.URLParam(r, "articleID")
|
||||
article, err := dbGetArticle(articleID)
|
||||
if err != nil {
|
||||
http.Error(w, http.StatusText(404), 404)
|
||||
return
|
||||
}
|
||||
ctx := context.WithValue(r.Context(), "article", article)
|
||||
next.ServeHTTP(w, r.WithContext(ctx))
|
||||
})
|
||||
}
|
||||
|
||||
func getArticle(w http.ResponseWriter, r *http.Request) {
|
||||
ctx := r.Context()
|
||||
article, ok := ctx.Value("article").(*Article)
|
||||
if !ok {
|
||||
http.Error(w, http.StatusText(422), 422)
|
||||
return
|
||||
}
|
||||
w.Write([]byte(fmt.Sprintf("title:%s", article.Title)))
|
||||
}
|
||||
|
||||
// A completely separate router for administrator routes
|
||||
func adminRouter() http.Handler {
|
||||
r := chi.NewRouter()
|
||||
r.Use(AdminOnly)
|
||||
r.Get("/", adminIndex)
|
||||
r.Get("/accounts", adminListAccounts)
|
||||
return r
|
||||
}
|
||||
|
||||
func AdminOnly(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
ctx := r.Context()
|
||||
perm, ok := ctx.Value("acl.permission").(YourPermissionType)
|
||||
if !ok || !perm.IsAdmin() {
|
||||
http.Error(w, http.StatusText(403), 403)
|
||||
return
|
||||
}
|
||||
next.ServeHTTP(w, r)
|
||||
})
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
## Router interface
|
||||
|
||||
chi's router is based on a kind of [Patricia Radix trie](https://en.wikipedia.org/wiki/Radix_tree).
|
||||
The router is fully compatible with `net/http`.
|
||||
|
||||
Built on top of the tree is the `Router` interface:
|
||||
|
||||
```go
|
||||
// Router consisting of the core routing methods used by chi's Mux,
|
||||
// using only the standard net/http.
|
||||
type Router interface {
|
||||
http.Handler
|
||||
Routes
|
||||
|
||||
// Use appends one or more middlewares onto the Router stack.
|
||||
Use(middlewares ...func(http.Handler) http.Handler)
|
||||
|
||||
// With adds inline middlewares for an endpoint handler.
|
||||
With(middlewares ...func(http.Handler) http.Handler) Router
|
||||
|
||||
// Group adds a new inline-Router along the current routing
|
||||
// path, with a fresh middleware stack for the inline-Router.
|
||||
Group(fn func(r Router)) Router
|
||||
|
||||
// Route mounts a sub-Router along a `pattern`` string.
|
||||
Route(pattern string, fn func(r Router)) Router
|
||||
|
||||
// Mount attaches another http.Handler along ./pattern/*
|
||||
Mount(pattern string, h http.Handler)
|
||||
|
||||
// Handle and HandleFunc adds routes for `pattern` that matches
|
||||
// all HTTP methods.
|
||||
Handle(pattern string, h http.Handler)
|
||||
HandleFunc(pattern string, h http.HandlerFunc)
|
||||
|
||||
// Method and MethodFunc adds routes for `pattern` that matches
|
||||
// the `method` HTTP method.
|
||||
Method(method, pattern string, h http.Handler)
|
||||
MethodFunc(method, pattern string, h http.HandlerFunc)
|
||||
|
||||
// HTTP-method routing along `pattern`
|
||||
Connect(pattern string, h http.HandlerFunc)
|
||||
Delete(pattern string, h http.HandlerFunc)
|
||||
Get(pattern string, h http.HandlerFunc)
|
||||
Head(pattern string, h http.HandlerFunc)
|
||||
Options(pattern string, h http.HandlerFunc)
|
||||
Patch(pattern string, h http.HandlerFunc)
|
||||
Post(pattern string, h http.HandlerFunc)
|
||||
Put(pattern string, h http.HandlerFunc)
|
||||
Trace(pattern string, h http.HandlerFunc)
|
||||
|
||||
// NotFound defines a handler to respond whenever a route could
|
||||
// not be found.
|
||||
NotFound(h http.HandlerFunc)
|
||||
|
||||
// MethodNotAllowed defines a handler to respond whenever a method is
|
||||
// not allowed.
|
||||
MethodNotAllowed(h http.HandlerFunc)
|
||||
}
|
||||
|
||||
// Routes interface adds two methods for router traversal, which is also
|
||||
// used by the github.com/go-chi/docgen package to generate documentation for Routers.
|
||||
type Routes interface {
|
||||
// Routes returns the routing tree in an easily traversable structure.
|
||||
Routes() []Route
|
||||
|
||||
// Middlewares returns the list of middlewares in use by the router.
|
||||
Middlewares() Middlewares
|
||||
|
||||
// Match searches the routing tree for a handler that matches
|
||||
// the method/path - similar to routing a http request, but without
|
||||
// executing the handler thereafter.
|
||||
Match(rctx *Context, method, path string) bool
|
||||
}
|
||||
```
|
||||
|
||||
Each routing method accepts a URL `pattern` and chain of `handlers`. The URL pattern
|
||||
supports named params (ie. `/users/{userID}`) and wildcards (ie. `/admin/*`). URL parameters
|
||||
can be fetched at runtime by calling `chi.URLParam(r, "userID")` for named parameters
|
||||
and `chi.URLParam(r, "*")` for a wildcard parameter.
|
||||
|
||||
|
||||
### Middleware handlers
|
||||
|
||||
chi's middlewares are just stdlib net/http middleware handlers. There is nothing special
|
||||
about them, which means the router and all the tooling is designed to be compatible and
|
||||
friendly with any middleware in the community. This offers much better extensibility and reuse
|
||||
of packages and is at the heart of chi's purpose.
|
||||
|
||||
Here is an example of a standard net/http middleware where we assign a context key `"user"`
|
||||
the value of `"123"`. This middleware sets a hypothetical user identifier on the request
|
||||
context and calls the next handler in the chain.
|
||||
|
||||
```go
|
||||
// HTTP middleware setting a value on the request context
|
||||
func MyMiddleware(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
// create new context from `r` request context, and assign key `"user"`
|
||||
// to value of `"123"`
|
||||
ctx := context.WithValue(r.Context(), "user", "123")
|
||||
|
||||
// call the next handler in the chain, passing the response writer and
|
||||
// the updated request object with the new context value.
|
||||
//
|
||||
// note: context.Context values are nested, so any previously set
|
||||
// values will be accessible as well, and the new `"user"` key
|
||||
// will be accessible from this point forward.
|
||||
next.ServeHTTP(w, r.WithContext(ctx))
|
||||
})
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
### Request handlers
|
||||
|
||||
chi uses standard net/http request handlers. This little snippet is an example of a http.Handler
|
||||
func that reads a user identifier from the request context - hypothetically, identifying
|
||||
the user sending an authenticated request, validated+set by a previous middleware handler.
|
||||
|
||||
```go
|
||||
// HTTP handler accessing data from the request context.
|
||||
func MyRequestHandler(w http.ResponseWriter, r *http.Request) {
|
||||
// here we read from the request context and fetch out `"user"` key set in
|
||||
// the MyMiddleware example above.
|
||||
user := r.Context().Value("user").(string)
|
||||
|
||||
// respond to the client
|
||||
w.Write([]byte(fmt.Sprintf("hi %s", user)))
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
### URL parameters
|
||||
|
||||
chi's router parses and stores URL parameters right onto the request context. Here is
|
||||
an example of how to access URL params in your net/http handlers. And of course, middlewares
|
||||
are able to access the same information.
|
||||
|
||||
```go
|
||||
// HTTP handler accessing the url routing parameters.
|
||||
func MyRequestHandler(w http.ResponseWriter, r *http.Request) {
|
||||
// fetch the url parameter `"userID"` from the request of a matching
|
||||
// routing pattern. An example routing pattern could be: /users/{userID}
|
||||
userID := chi.URLParam(r, "userID")
|
||||
|
||||
// fetch `"key"` from the request context
|
||||
ctx := r.Context()
|
||||
key := ctx.Value("key").(string)
|
||||
|
||||
// respond to the client
|
||||
w.Write([]byte(fmt.Sprintf("hi %v, %v", userID, key)))
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
## Middlewares
|
||||
|
||||
chi comes equipped with an optional `middleware` package, providing a suite of standard
|
||||
`net/http` middlewares. Please note, any middleware in the ecosystem that is also compatible
|
||||
with `net/http` can be used with chi's mux.
|
||||
|
||||
### Core middlewares
|
||||
|
||||
----------------------------------------------------------------------------------------------------
|
||||
| chi/middleware Handler | description |
|
||||
| :--------------------- | :---------------------------------------------------------------------- |
|
||||
| [AllowContentEncoding] | Enforces a whitelist of request Content-Encoding headers |
|
||||
| [AllowContentType] | Explicit whitelist of accepted request Content-Types |
|
||||
| [BasicAuth] | Basic HTTP authentication |
|
||||
| [Compress] | Gzip compression for clients that accept compressed responses |
|
||||
| [ContentCharset] | Ensure charset for Content-Type request headers |
|
||||
| [CleanPath] | Clean double slashes from request path |
|
||||
| [GetHead] | Automatically route undefined HEAD requests to GET handlers |
|
||||
| [Heartbeat] | Monitoring endpoint to check the servers pulse |
|
||||
| [Logger] | Logs the start and end of each request with the elapsed processing time |
|
||||
| [NoCache] | Sets response headers to prevent clients from caching |
|
||||
| [Profiler] | Easily attach net/http/pprof to your routers |
|
||||
| [RealIP] | Sets a http.Request's RemoteAddr to either X-Real-IP or X-Forwarded-For |
|
||||
| [Recoverer] | Gracefully absorb panics and prints the stack trace |
|
||||
| [RequestID] | Injects a request ID into the context of each request |
|
||||
| [RedirectSlashes] | Redirect slashes on routing paths |
|
||||
| [RouteHeaders] | Route handling for request headers |
|
||||
| [SetHeader] | Short-hand middleware to set a response header key/value |
|
||||
| [StripSlashes] | Strip slashes on routing paths |
|
||||
| [Throttle] | Puts a ceiling on the number of concurrent requests |
|
||||
| [Timeout] | Signals to the request context when the timeout deadline is reached |
|
||||
| [URLFormat] | Parse extension from url and put it on request context |
|
||||
| [WithValue] | Short-hand middleware to set a key/value on the request context |
|
||||
----------------------------------------------------------------------------------------------------
|
||||
|
||||
[AllowContentEncoding]: https://pkg.go.dev/github.com/go-chi/chi/middleware#AllowContentEncoding
|
||||
[AllowContentType]: https://pkg.go.dev/github.com/go-chi/chi/middleware#AllowContentType
|
||||
[BasicAuth]: https://pkg.go.dev/github.com/go-chi/chi/middleware#BasicAuth
|
||||
[Compress]: https://pkg.go.dev/github.com/go-chi/chi/middleware#Compress
|
||||
[ContentCharset]: https://pkg.go.dev/github.com/go-chi/chi/middleware#ContentCharset
|
||||
[CleanPath]: https://pkg.go.dev/github.com/go-chi/chi/middleware#CleanPath
|
||||
[GetHead]: https://pkg.go.dev/github.com/go-chi/chi/middleware#GetHead
|
||||
[GetReqID]: https://pkg.go.dev/github.com/go-chi/chi/middleware#GetReqID
|
||||
[Heartbeat]: https://pkg.go.dev/github.com/go-chi/chi/middleware#Heartbeat
|
||||
[Logger]: https://pkg.go.dev/github.com/go-chi/chi/middleware#Logger
|
||||
[NoCache]: https://pkg.go.dev/github.com/go-chi/chi/middleware#NoCache
|
||||
[Profiler]: https://pkg.go.dev/github.com/go-chi/chi/middleware#Profiler
|
||||
[RealIP]: https://pkg.go.dev/github.com/go-chi/chi/middleware#RealIP
|
||||
[Recoverer]: https://pkg.go.dev/github.com/go-chi/chi/middleware#Recoverer
|
||||
[RedirectSlashes]: https://pkg.go.dev/github.com/go-chi/chi/middleware#RedirectSlashes
|
||||
[RequestLogger]: https://pkg.go.dev/github.com/go-chi/chi/middleware#RequestLogger
|
||||
[RequestID]: https://pkg.go.dev/github.com/go-chi/chi/middleware#RequestID
|
||||
[RouteHeaders]: https://pkg.go.dev/github.com/go-chi/chi/middleware#RouteHeaders
|
||||
[SetHeader]: https://pkg.go.dev/github.com/go-chi/chi/middleware#SetHeader
|
||||
[StripSlashes]: https://pkg.go.dev/github.com/go-chi/chi/middleware#StripSlashes
|
||||
[Throttle]: https://pkg.go.dev/github.com/go-chi/chi/middleware#Throttle
|
||||
[ThrottleBacklog]: https://pkg.go.dev/github.com/go-chi/chi/middleware#ThrottleBacklog
|
||||
[ThrottleWithOpts]: https://pkg.go.dev/github.com/go-chi/chi/middleware#ThrottleWithOpts
|
||||
[Timeout]: https://pkg.go.dev/github.com/go-chi/chi/middleware#Timeout
|
||||
[URLFormat]: https://pkg.go.dev/github.com/go-chi/chi/middleware#URLFormat
|
||||
[WithLogEntry]: https://pkg.go.dev/github.com/go-chi/chi/middleware#WithLogEntry
|
||||
[WithValue]: https://pkg.go.dev/github.com/go-chi/chi/middleware#WithValue
|
||||
[Compressor]: https://pkg.go.dev/github.com/go-chi/chi/middleware#Compressor
|
||||
[DefaultLogFormatter]: https://pkg.go.dev/github.com/go-chi/chi/middleware#DefaultLogFormatter
|
||||
[EncoderFunc]: https://pkg.go.dev/github.com/go-chi/chi/middleware#EncoderFunc
|
||||
[HeaderRoute]: https://pkg.go.dev/github.com/go-chi/chi/middleware#HeaderRoute
|
||||
[HeaderRouter]: https://pkg.go.dev/github.com/go-chi/chi/middleware#HeaderRouter
|
||||
[LogEntry]: https://pkg.go.dev/github.com/go-chi/chi/middleware#LogEntry
|
||||
[LogFormatter]: https://pkg.go.dev/github.com/go-chi/chi/middleware#LogFormatter
|
||||
[LoggerInterface]: https://pkg.go.dev/github.com/go-chi/chi/middleware#LoggerInterface
|
||||
[ThrottleOpts]: https://pkg.go.dev/github.com/go-chi/chi/middleware#ThrottleOpts
|
||||
[WrapResponseWriter]: https://pkg.go.dev/github.com/go-chi/chi/middleware#WrapResponseWriter
|
||||
|
||||
### Extra middlewares & packages
|
||||
|
||||
Please see https://github.com/go-chi for additional packages.
|
||||
|
||||
--------------------------------------------------------------------------------------------------------------------
|
||||
| package | description |
|
||||
|:---------------------------------------------------|:-------------------------------------------------------------
|
||||
| [cors](https://github.com/go-chi/cors) | Cross-origin resource sharing (CORS) |
|
||||
| [docgen](https://github.com/go-chi/docgen) | Print chi.Router routes at runtime |
|
||||
| [jwtauth](https://github.com/go-chi/jwtauth) | JWT authentication |
|
||||
| [hostrouter](https://github.com/go-chi/hostrouter) | Domain/host based request routing |
|
||||
| [httplog](https://github.com/go-chi/httplog) | Small but powerful structured HTTP request logging |
|
||||
| [httprate](https://github.com/go-chi/httprate) | HTTP request rate limiter |
|
||||
| [httptracer](https://github.com/go-chi/httptracer) | HTTP request performance tracing library |
|
||||
| [httpvcr](https://github.com/go-chi/httpvcr) | Write deterministic tests for external sources |
|
||||
| [stampede](https://github.com/go-chi/stampede) | HTTP request coalescer |
|
||||
--------------------------------------------------------------------------------------------------------------------
|
||||
|
||||
|
||||
## context?
|
||||
|
||||
`context` is a tiny pkg that provides simple interface to signal context across call stacks
|
||||
and goroutines. It was originally written by [Sameer Ajmani](https://github.com/Sajmani)
|
||||
and is available in stdlib since go1.7.
|
||||
|
||||
Learn more at https://blog.golang.org/context
|
||||
|
||||
and..
|
||||
* Docs: https://golang.org/pkg/context
|
||||
* Source: https://github.com/golang/go/tree/master/src/context
|
||||
|
||||
|
||||
## Benchmarks
|
||||
|
||||
The benchmark suite: https://github.com/pkieltyka/go-http-routing-benchmark
|
||||
|
||||
Results as of Nov 29, 2020 with Go 1.15.5 on Linux AMD 3950x
|
||||
|
||||
```shell
|
||||
BenchmarkChi_Param 3075895 384 ns/op 400 B/op 2 allocs/op
|
||||
BenchmarkChi_Param5 2116603 566 ns/op 400 B/op 2 allocs/op
|
||||
BenchmarkChi_Param20 964117 1227 ns/op 400 B/op 2 allocs/op
|
||||
BenchmarkChi_ParamWrite 2863413 420 ns/op 400 B/op 2 allocs/op
|
||||
BenchmarkChi_GithubStatic 3045488 395 ns/op 400 B/op 2 allocs/op
|
||||
BenchmarkChi_GithubParam 2204115 540 ns/op 400 B/op 2 allocs/op
|
||||
BenchmarkChi_GithubAll 10000 113811 ns/op 81203 B/op 406 allocs/op
|
||||
BenchmarkChi_GPlusStatic 3337485 359 ns/op 400 B/op 2 allocs/op
|
||||
BenchmarkChi_GPlusParam 2825853 423 ns/op 400 B/op 2 allocs/op
|
||||
BenchmarkChi_GPlus2Params 2471697 483 ns/op 400 B/op 2 allocs/op
|
||||
BenchmarkChi_GPlusAll 194220 5950 ns/op 5200 B/op 26 allocs/op
|
||||
BenchmarkChi_ParseStatic 3365324 356 ns/op 400 B/op 2 allocs/op
|
||||
BenchmarkChi_ParseParam 2976614 404 ns/op 400 B/op 2 allocs/op
|
||||
BenchmarkChi_Parse2Params 2638084 439 ns/op 400 B/op 2 allocs/op
|
||||
BenchmarkChi_ParseAll 109567 11295 ns/op 10400 B/op 52 allocs/op
|
||||
BenchmarkChi_StaticAll 16846 71308 ns/op 62802 B/op 314 allocs/op
|
||||
```
|
||||
|
||||
Comparison with other routers: https://gist.github.com/pkieltyka/123032f12052520aaccab752bd3e78cc
|
||||
|
||||
NOTE: the allocs in the benchmark above are from the calls to http.Request's
|
||||
`WithContext(context.Context)` method that clones the http.Request, sets the `Context()`
|
||||
on the duplicated (alloc'd) request and returns it the new request object. This is just
|
||||
how setting context on a request in Go works.
|
||||
|
||||
|
||||
## Credits
|
||||
|
||||
* Carl Jackson for https://github.com/zenazn/goji
|
||||
* Parts of chi's thinking comes from goji, and chi's middleware package
|
||||
sources from goji.
|
||||
* Armon Dadgar for https://github.com/armon/go-radix
|
||||
* Contributions: [@VojtechVitek](https://github.com/VojtechVitek)
|
||||
|
||||
We'll be more than happy to see [your contributions](./CONTRIBUTING.md)!
|
||||
|
||||
|
||||
## Beyond REST
|
||||
|
||||
chi is just a http router that lets you decompose request handling into many smaller layers.
|
||||
Many companies use chi to write REST services for their public APIs. But, REST is just a convention
|
||||
for managing state via HTTP, and there's a lot of other pieces required to write a complete client-server
|
||||
system or network of microservices.
|
||||
|
||||
Looking beyond REST, I also recommend some newer works in the field:
|
||||
* [webrpc](https://github.com/webrpc/webrpc) - Web-focused RPC client+server framework with code-gen
|
||||
* [gRPC](https://github.com/grpc/grpc-go) - Google's RPC framework via protobufs
|
||||
* [graphql](https://github.com/99designs/gqlgen) - Declarative query language
|
||||
* [NATS](https://nats.io) - lightweight pub-sub
|
||||
|
||||
|
||||
## License
|
||||
|
||||
Copyright (c) 2015-present [Peter Kieltyka](https://github.com/pkieltyka)
|
||||
|
||||
Licensed under [MIT License](./LICENSE)
|
||||
|
||||
[GoDoc]: https://pkg.go.dev/github.com/go-chi/chi?tab=versions
|
||||
[GoDoc Widget]: https://godoc.org/github.com/go-chi/chi?status.svg
|
||||
[Travis]: https://travis-ci.org/go-chi/chi
|
||||
[Travis Widget]: https://travis-ci.org/go-chi/chi.svg?branch=master
|
||||
|
|
@ -0,0 +1,49 @@
|
|||
package chi
|
||||
|
||||
import "net/http"
|
||||
|
||||
// Chain returns a Middlewares type from a slice of middleware handlers.
|
||||
func Chain(middlewares ...func(http.Handler) http.Handler) Middlewares {
|
||||
return Middlewares(middlewares)
|
||||
}
|
||||
|
||||
// Handler builds and returns a http.Handler from the chain of middlewares,
|
||||
// with `h http.Handler` as the final handler.
|
||||
func (mws Middlewares) Handler(h http.Handler) http.Handler {
|
||||
return &ChainHandler{h, chain(mws, h), mws}
|
||||
}
|
||||
|
||||
// HandlerFunc builds and returns a http.Handler from the chain of middlewares,
|
||||
// with `h http.Handler` as the final handler.
|
||||
func (mws Middlewares) HandlerFunc(h http.HandlerFunc) http.Handler {
|
||||
return &ChainHandler{h, chain(mws, h), mws}
|
||||
}
|
||||
|
||||
// ChainHandler is a http.Handler with support for handler composition and
|
||||
// execution.
|
||||
type ChainHandler struct {
|
||||
Endpoint http.Handler
|
||||
chain http.Handler
|
||||
Middlewares Middlewares
|
||||
}
|
||||
|
||||
func (c *ChainHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
||||
c.chain.ServeHTTP(w, r)
|
||||
}
|
||||
|
||||
// chain builds a http.Handler composed of an inline middleware stack and endpoint
|
||||
// handler in the order they are passed.
|
||||
func chain(middlewares []func(http.Handler) http.Handler, endpoint http.Handler) http.Handler {
|
||||
// Return ahead of time if there aren't any middlewares for the chain
|
||||
if len(middlewares) == 0 {
|
||||
return endpoint
|
||||
}
|
||||
|
||||
// Wrap the end handler with the middleware chain
|
||||
h := middlewares[len(middlewares)-1](endpoint)
|
||||
for i := len(middlewares) - 2; i >= 0; i-- {
|
||||
h = middlewares[i](h)
|
||||
}
|
||||
|
||||
return h
|
||||
}
|
||||
|
|
@ -0,0 +1,134 @@
|
|||
//
|
||||
// Package chi is a small, idiomatic and composable router for building HTTP services.
|
||||
//
|
||||
// chi requires Go 1.10 or newer.
|
||||
//
|
||||
// Example:
|
||||
// package main
|
||||
//
|
||||
// import (
|
||||
// "net/http"
|
||||
//
|
||||
// "github.com/go-chi/chi/v5"
|
||||
// "github.com/go-chi/chi/v5/middleware"
|
||||
// )
|
||||
//
|
||||
// func main() {
|
||||
// r := chi.NewRouter()
|
||||
// r.Use(middleware.Logger)
|
||||
// r.Use(middleware.Recoverer)
|
||||
//
|
||||
// r.Get("/", func(w http.ResponseWriter, r *http.Request) {
|
||||
// w.Write([]byte("root."))
|
||||
// })
|
||||
//
|
||||
// http.ListenAndServe(":3333", r)
|
||||
// }
|
||||
//
|
||||
// See github.com/go-chi/chi/_examples/ for more in-depth examples.
|
||||
//
|
||||
// URL patterns allow for easy matching of path components in HTTP
|
||||
// requests. The matching components can then be accessed using
|
||||
// chi.URLParam(). All patterns must begin with a slash.
|
||||
//
|
||||
// A simple named placeholder {name} matches any sequence of characters
|
||||
// up to the next / or the end of the URL. Trailing slashes on paths must
|
||||
// be handled explicitly.
|
||||
//
|
||||
// A placeholder with a name followed by a colon allows a regular
|
||||
// expression match, for example {number:\\d+}. The regular expression
|
||||
// syntax is Go's normal regexp RE2 syntax, except that regular expressions
|
||||
// including { or } are not supported, and / will never be
|
||||
// matched. An anonymous regexp pattern is allowed, using an empty string
|
||||
// before the colon in the placeholder, such as {:\\d+}
|
||||
//
|
||||
// The special placeholder of asterisk matches the rest of the requested
|
||||
// URL. Any trailing characters in the pattern are ignored. This is the only
|
||||
// placeholder which will match / characters.
|
||||
//
|
||||
// Examples:
|
||||
// "/user/{name}" matches "/user/jsmith" but not "/user/jsmith/info" or "/user/jsmith/"
|
||||
// "/user/{name}/info" matches "/user/jsmith/info"
|
||||
// "/page/*" matches "/page/intro/latest"
|
||||
// "/page/*/index" also matches "/page/intro/latest"
|
||||
// "/date/{yyyy:\\d\\d\\d\\d}/{mm:\\d\\d}/{dd:\\d\\d}" matches "/date/2017/04/01"
|
||||
//
|
||||
package chi
|
||||
|
||||
import "net/http"
|
||||
|
||||
// NewRouter returns a new Mux object that implements the Router interface.
|
||||
func NewRouter() *Mux {
|
||||
return NewMux()
|
||||
}
|
||||
|
||||
// Router consisting of the core routing methods used by chi's Mux,
|
||||
// using only the standard net/http.
|
||||
type Router interface {
|
||||
http.Handler
|
||||
Routes
|
||||
|
||||
// Use appends one or more middlewares onto the Router stack.
|
||||
Use(middlewares ...func(http.Handler) http.Handler)
|
||||
|
||||
// With adds inline middlewares for an endpoint handler.
|
||||
With(middlewares ...func(http.Handler) http.Handler) Router
|
||||
|
||||
// Group adds a new inline-Router along the current routing
|
||||
// path, with a fresh middleware stack for the inline-Router.
|
||||
Group(fn func(r Router)) Router
|
||||
|
||||
// Route mounts a sub-Router along a `pattern`` string.
|
||||
Route(pattern string, fn func(r Router)) Router
|
||||
|
||||
// Mount attaches another http.Handler along ./pattern/*
|
||||
Mount(pattern string, h http.Handler)
|
||||
|
||||
// Handle and HandleFunc adds routes for `pattern` that matches
|
||||
// all HTTP methods.
|
||||
Handle(pattern string, h http.Handler)
|
||||
HandleFunc(pattern string, h http.HandlerFunc)
|
||||
|
||||
// Method and MethodFunc adds routes for `pattern` that matches
|
||||
// the `method` HTTP method.
|
||||
Method(method, pattern string, h http.Handler)
|
||||
MethodFunc(method, pattern string, h http.HandlerFunc)
|
||||
|
||||
// HTTP-method routing along `pattern`
|
||||
Connect(pattern string, h http.HandlerFunc)
|
||||
Delete(pattern string, h http.HandlerFunc)
|
||||
Get(pattern string, h http.HandlerFunc)
|
||||
Head(pattern string, h http.HandlerFunc)
|
||||
Options(pattern string, h http.HandlerFunc)
|
||||
Patch(pattern string, h http.HandlerFunc)
|
||||
Post(pattern string, h http.HandlerFunc)
|
||||
Put(pattern string, h http.HandlerFunc)
|
||||
Trace(pattern string, h http.HandlerFunc)
|
||||
|
||||
// NotFound defines a handler to respond whenever a route could
|
||||
// not be found.
|
||||
NotFound(h http.HandlerFunc)
|
||||
|
||||
// MethodNotAllowed defines a handler to respond whenever a method is
|
||||
// not allowed.
|
||||
MethodNotAllowed(h http.HandlerFunc)
|
||||
}
|
||||
|
||||
// Routes interface adds two methods for router traversal, which is also
|
||||
// used by the `docgen` subpackage to generation documentation for Routers.
|
||||
type Routes interface {
|
||||
// Routes returns the routing tree in an easily traversable structure.
|
||||
Routes() []Route
|
||||
|
||||
// Middlewares returns the list of middlewares in use by the router.
|
||||
Middlewares() Middlewares
|
||||
|
||||
// Match searches the routing tree for a handler that matches
|
||||
// the method/path - similar to routing a http request, but without
|
||||
// executing the handler thereafter.
|
||||
Match(rctx *Context, method, path string) bool
|
||||
}
|
||||
|
||||
// Middlewares type is a slice of standard middleware handlers with methods
|
||||
// to compose middleware chains and http.Handler's.
|
||||
type Middlewares []func(http.Handler) http.Handler
|
||||
|
|
@ -0,0 +1,157 @@
|
|||
package chi
|
||||
|
||||
import (
|
||||
"context"
|
||||
"net/http"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// URLParam returns the url parameter from a http.Request object.
|
||||
func URLParam(r *http.Request, key string) string {
|
||||
if rctx := RouteContext(r.Context()); rctx != nil {
|
||||
return rctx.URLParam(key)
|
||||
}
|
||||
return ""
|
||||
}
|
||||
|
||||
// URLParamFromCtx returns the url parameter from a http.Request Context.
|
||||
func URLParamFromCtx(ctx context.Context, key string) string {
|
||||
if rctx := RouteContext(ctx); rctx != nil {
|
||||
return rctx.URLParam(key)
|
||||
}
|
||||
return ""
|
||||
}
|
||||
|
||||
// RouteContext returns chi's routing Context object from a
|
||||
// http.Request Context.
|
||||
func RouteContext(ctx context.Context) *Context {
|
||||
val, _ := ctx.Value(RouteCtxKey).(*Context)
|
||||
return val
|
||||
}
|
||||
|
||||
// NewRouteContext returns a new routing Context object.
|
||||
func NewRouteContext() *Context {
|
||||
return &Context{}
|
||||
}
|
||||
|
||||
var (
|
||||
// RouteCtxKey is the context.Context key to store the request context.
|
||||
RouteCtxKey = &contextKey{"RouteContext"}
|
||||
)
|
||||
|
||||
// Context is the default routing context set on the root node of a
|
||||
// request context to track route patterns, URL parameters and
|
||||
// an optional routing path.
|
||||
type Context struct {
|
||||
Routes Routes
|
||||
|
||||
// parentCtx is the parent of this one, for using Context as a
|
||||
// context.Context directly. This is an optimization that saves
|
||||
// 1 allocation.
|
||||
parentCtx context.Context
|
||||
|
||||
// Routing path/method override used during the route search.
|
||||
// See Mux#routeHTTP method.
|
||||
RoutePath string
|
||||
RouteMethod string
|
||||
|
||||
// URLParams are the stack of routeParams captured during the
|
||||
// routing lifecycle across a stack of sub-routers.
|
||||
URLParams RouteParams
|
||||
|
||||
// Route parameters matched for the current sub-router. It is
|
||||
// intentionally unexported so it cant be tampered.
|
||||
routeParams RouteParams
|
||||
|
||||
// The endpoint routing pattern that matched the request URI path
|
||||
// or `RoutePath` of the current sub-router. This value will update
|
||||
// during the lifecycle of a request passing through a stack of
|
||||
// sub-routers.
|
||||
routePattern string
|
||||
|
||||
// Routing pattern stack throughout the lifecycle of the request,
|
||||
// across all connected routers. It is a record of all matching
|
||||
// patterns across a stack of sub-routers.
|
||||
RoutePatterns []string
|
||||
|
||||
// methodNotAllowed hint
|
||||
methodNotAllowed bool
|
||||
}
|
||||
|
||||
// Reset a routing context to its initial state.
|
||||
func (x *Context) Reset() {
|
||||
x.Routes = nil
|
||||
x.RoutePath = ""
|
||||
x.RouteMethod = ""
|
||||
x.RoutePatterns = x.RoutePatterns[:0]
|
||||
x.URLParams.Keys = x.URLParams.Keys[:0]
|
||||
x.URLParams.Values = x.URLParams.Values[:0]
|
||||
|
||||
x.routePattern = ""
|
||||
x.routeParams.Keys = x.routeParams.Keys[:0]
|
||||
x.routeParams.Values = x.routeParams.Values[:0]
|
||||
x.methodNotAllowed = false
|
||||
x.parentCtx = nil
|
||||
}
|
||||
|
||||
// URLParam returns the corresponding URL parameter value from the request
|
||||
// routing context.
|
||||
func (x *Context) URLParam(key string) string {
|
||||
for k := len(x.URLParams.Keys) - 1; k >= 0; k-- {
|
||||
if x.URLParams.Keys[k] == key {
|
||||
return x.URLParams.Values[k]
|
||||
}
|
||||
}
|
||||
return ""
|
||||
}
|
||||
|
||||
// RoutePattern builds the routing pattern string for the particular
|
||||
// request, at the particular point during routing. This means, the value
|
||||
// will change throughout the execution of a request in a router. That is
|
||||
// why its advised to only use this value after calling the next handler.
|
||||
//
|
||||
// For example,
|
||||
//
|
||||
// func Instrument(next http.Handler) http.Handler {
|
||||
// return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
// next.ServeHTTP(w, r)
|
||||
// routePattern := chi.RouteContext(r.Context()).RoutePattern()
|
||||
// measure(w, r, routePattern)
|
||||
// })
|
||||
// }
|
||||
func (x *Context) RoutePattern() string {
|
||||
routePattern := strings.Join(x.RoutePatterns, "")
|
||||
return replaceWildcards(routePattern)
|
||||
}
|
||||
|
||||
// replaceWildcards takes a route pattern and recursively replaces all
|
||||
// occurrences of "/*/" to "/".
|
||||
func replaceWildcards(p string) string {
|
||||
if strings.Contains(p, "/*/") {
|
||||
return replaceWildcards(strings.Replace(p, "/*/", "/", -1))
|
||||
}
|
||||
|
||||
return p
|
||||
}
|
||||
|
||||
// RouteParams is a structure to track URL routing parameters efficiently.
|
||||
type RouteParams struct {
|
||||
Keys, Values []string
|
||||
}
|
||||
|
||||
// Add will append a URL parameter to the end of the route param
|
||||
func (s *RouteParams) Add(key, value string) {
|
||||
s.Keys = append(s.Keys, key)
|
||||
s.Values = append(s.Values, value)
|
||||
}
|
||||
|
||||
// contextKey is a value for use with context.WithValue. It's used as
|
||||
// a pointer so it fits in an interface{} without allocation. This technique
|
||||
// for defining context keys was copied from Go 1.7's new use of context in net/http.
|
||||
type contextKey struct {
|
||||
name string
|
||||
}
|
||||
|
||||
func (k *contextKey) String() string {
|
||||
return "chi context value " + k.name
|
||||
}
|
||||
|
|
@ -0,0 +1,33 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"crypto/subtle"
|
||||
"fmt"
|
||||
"net/http"
|
||||
)
|
||||
|
||||
// BasicAuth implements a simple middleware handler for adding basic http auth to a route.
|
||||
func BasicAuth(realm string, creds map[string]string) func(next http.Handler) http.Handler {
|
||||
return func(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
user, pass, ok := r.BasicAuth()
|
||||
if !ok {
|
||||
basicAuthFailed(w, realm)
|
||||
return
|
||||
}
|
||||
|
||||
credPass, credUserOk := creds[user]
|
||||
if !credUserOk || subtle.ConstantTimeCompare([]byte(pass), []byte(credPass)) != 1 {
|
||||
basicAuthFailed(w, realm)
|
||||
return
|
||||
}
|
||||
|
||||
next.ServeHTTP(w, r)
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func basicAuthFailed(w http.ResponseWriter, realm string) {
|
||||
w.Header().Add("WWW-Authenticate", fmt.Sprintf(`Basic realm="%s"`, realm))
|
||||
w.WriteHeader(http.StatusUnauthorized)
|
||||
}
|
||||
|
|
@ -0,0 +1,28 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"path"
|
||||
|
||||
"github.com/go-chi/chi/v5"
|
||||
)
|
||||
|
||||
// CleanPath middleware will clean out double slash mistakes from a user's request path.
|
||||
// For example, if a user requests /users//1 or //users////1 will both be treated as: /users/1
|
||||
func CleanPath(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
rctx := chi.RouteContext(r.Context())
|
||||
|
||||
routePath := rctx.RoutePath
|
||||
if routePath == "" {
|
||||
if r.URL.RawPath != "" {
|
||||
routePath = r.URL.RawPath
|
||||
} else {
|
||||
routePath = r.URL.Path
|
||||
}
|
||||
rctx.RoutePath = path.Clean(routePath)
|
||||
}
|
||||
|
||||
next.ServeHTTP(w, r)
|
||||
})
|
||||
}
|
||||
|
|
@ -0,0 +1,399 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"compress/flate"
|
||||
"compress/gzip"
|
||||
"errors"
|
||||
"fmt"
|
||||
"io"
|
||||
"io/ioutil"
|
||||
"net"
|
||||
"net/http"
|
||||
"strings"
|
||||
"sync"
|
||||
)
|
||||
|
||||
var defaultCompressibleContentTypes = []string{
|
||||
"text/html",
|
||||
"text/css",
|
||||
"text/plain",
|
||||
"text/javascript",
|
||||
"application/javascript",
|
||||
"application/x-javascript",
|
||||
"application/json",
|
||||
"application/atom+xml",
|
||||
"application/rss+xml",
|
||||
"image/svg+xml",
|
||||
}
|
||||
|
||||
// Compress is a middleware that compresses response
|
||||
// body of a given content types to a data format based
|
||||
// on Accept-Encoding request header. It uses a given
|
||||
// compression level.
|
||||
//
|
||||
// NOTE: make sure to set the Content-Type header on your response
|
||||
// otherwise this middleware will not compress the response body. For ex, in
|
||||
// your handler you should set w.Header().Set("Content-Type", http.DetectContentType(yourBody))
|
||||
// or set it manually.
|
||||
//
|
||||
// Passing a compression level of 5 is sensible value
|
||||
func Compress(level int, types ...string) func(next http.Handler) http.Handler {
|
||||
compressor := NewCompressor(level, types...)
|
||||
return compressor.Handler
|
||||
}
|
||||
|
||||
// Compressor represents a set of encoding configurations.
|
||||
type Compressor struct {
|
||||
// The mapping of encoder names to encoder functions.
|
||||
encoders map[string]EncoderFunc
|
||||
// The mapping of pooled encoders to pools.
|
||||
pooledEncoders map[string]*sync.Pool
|
||||
// The set of content types allowed to be compressed.
|
||||
allowedTypes map[string]struct{}
|
||||
allowedWildcards map[string]struct{}
|
||||
// The list of encoders in order of decreasing precedence.
|
||||
encodingPrecedence []string
|
||||
level int // The compression level.
|
||||
}
|
||||
|
||||
// NewCompressor creates a new Compressor that will handle encoding responses.
|
||||
//
|
||||
// The level should be one of the ones defined in the flate package.
|
||||
// The types are the content types that are allowed to be compressed.
|
||||
func NewCompressor(level int, types ...string) *Compressor {
|
||||
// If types are provided, set those as the allowed types. If none are
|
||||
// provided, use the default list.
|
||||
allowedTypes := make(map[string]struct{})
|
||||
allowedWildcards := make(map[string]struct{})
|
||||
if len(types) > 0 {
|
||||
for _, t := range types {
|
||||
if strings.Contains(strings.TrimSuffix(t, "/*"), "*") {
|
||||
panic(fmt.Sprintf("middleware/compress: Unsupported content-type wildcard pattern '%s'. Only '/*' supported", t))
|
||||
}
|
||||
if strings.HasSuffix(t, "/*") {
|
||||
allowedWildcards[strings.TrimSuffix(t, "/*")] = struct{}{}
|
||||
} else {
|
||||
allowedTypes[t] = struct{}{}
|
||||
}
|
||||
}
|
||||
} else {
|
||||
for _, t := range defaultCompressibleContentTypes {
|
||||
allowedTypes[t] = struct{}{}
|
||||
}
|
||||
}
|
||||
|
||||
c := &Compressor{
|
||||
level: level,
|
||||
encoders: make(map[string]EncoderFunc),
|
||||
pooledEncoders: make(map[string]*sync.Pool),
|
||||
allowedTypes: allowedTypes,
|
||||
allowedWildcards: allowedWildcards,
|
||||
}
|
||||
|
||||
// Set the default encoders. The precedence order uses the reverse
|
||||
// ordering that the encoders were added. This means adding new encoders
|
||||
// will move them to the front of the order.
|
||||
//
|
||||
// TODO:
|
||||
// lzma: Opera.
|
||||
// sdch: Chrome, Android. Gzip output + dictionary header.
|
||||
// br: Brotli, see https://github.com/go-chi/chi/pull/326
|
||||
|
||||
// HTTP 1.1 "deflate" (RFC 2616) stands for DEFLATE data (RFC 1951)
|
||||
// wrapped with zlib (RFC 1950). The zlib wrapper uses Adler-32
|
||||
// checksum compared to CRC-32 used in "gzip" and thus is faster.
|
||||
//
|
||||
// But.. some old browsers (MSIE, Safari 5.1) incorrectly expect
|
||||
// raw DEFLATE data only, without the mentioned zlib wrapper.
|
||||
// Because of this major confusion, most modern browsers try it
|
||||
// both ways, first looking for zlib headers.
|
||||
// Quote by Mark Adler: http://stackoverflow.com/a/9186091/385548
|
||||
//
|
||||
// The list of browsers having problems is quite big, see:
|
||||
// http://zoompf.com/blog/2012/02/lose-the-wait-http-compression
|
||||
// https://web.archive.org/web/20120321182910/http://www.vervestudios.co/projects/compression-tests/results
|
||||
//
|
||||
// That's why we prefer gzip over deflate. It's just more reliable
|
||||
// and not significantly slower than gzip.
|
||||
c.SetEncoder("deflate", encoderDeflate)
|
||||
|
||||
// TODO: Exception for old MSIE browsers that can't handle non-HTML?
|
||||
// https://zoompf.com/blog/2012/02/lose-the-wait-http-compression
|
||||
c.SetEncoder("gzip", encoderGzip)
|
||||
|
||||
// NOTE: Not implemented, intentionally:
|
||||
// case "compress": // LZW. Deprecated.
|
||||
// case "bzip2": // Too slow on-the-fly.
|
||||
// case "zopfli": // Too slow on-the-fly.
|
||||
// case "xz": // Too slow on-the-fly.
|
||||
return c
|
||||
}
|
||||
|
||||
// SetEncoder can be used to set the implementation of a compression algorithm.
|
||||
//
|
||||
// The encoding should be a standardised identifier. See:
|
||||
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Encoding
|
||||
//
|
||||
// For example, add the Brotli algortithm:
|
||||
//
|
||||
// import brotli_enc "gopkg.in/kothar/brotli-go.v0/enc"
|
||||
//
|
||||
// compressor := middleware.NewCompressor(5, "text/html")
|
||||
// compressor.SetEncoder("br", func(w http.ResponseWriter, level int) io.Writer {
|
||||
// params := brotli_enc.NewBrotliParams()
|
||||
// params.SetQuality(level)
|
||||
// return brotli_enc.NewBrotliWriter(params, w)
|
||||
// })
|
||||
func (c *Compressor) SetEncoder(encoding string, fn EncoderFunc) {
|
||||
encoding = strings.ToLower(encoding)
|
||||
if encoding == "" {
|
||||
panic("the encoding can not be empty")
|
||||
}
|
||||
if fn == nil {
|
||||
panic("attempted to set a nil encoder function")
|
||||
}
|
||||
|
||||
// If we are adding a new encoder that is already registered, we have to
|
||||
// clear that one out first.
|
||||
if _, ok := c.pooledEncoders[encoding]; ok {
|
||||
delete(c.pooledEncoders, encoding)
|
||||
}
|
||||
if _, ok := c.encoders[encoding]; ok {
|
||||
delete(c.encoders, encoding)
|
||||
}
|
||||
|
||||
// If the encoder supports Resetting (IoReseterWriter), then it can be pooled.
|
||||
encoder := fn(ioutil.Discard, c.level)
|
||||
if encoder != nil {
|
||||
if _, ok := encoder.(ioResetterWriter); ok {
|
||||
pool := &sync.Pool{
|
||||
New: func() interface{} {
|
||||
return fn(ioutil.Discard, c.level)
|
||||
},
|
||||
}
|
||||
c.pooledEncoders[encoding] = pool
|
||||
}
|
||||
}
|
||||
// If the encoder is not in the pooledEncoders, add it to the normal encoders.
|
||||
if _, ok := c.pooledEncoders[encoding]; !ok {
|
||||
c.encoders[encoding] = fn
|
||||
}
|
||||
|
||||
for i, v := range c.encodingPrecedence {
|
||||
if v == encoding {
|
||||
c.encodingPrecedence = append(c.encodingPrecedence[:i], c.encodingPrecedence[i+1:]...)
|
||||
}
|
||||
}
|
||||
|
||||
c.encodingPrecedence = append([]string{encoding}, c.encodingPrecedence...)
|
||||
}
|
||||
|
||||
// Handler returns a new middleware that will compress the response based on the
|
||||
// current Compressor.
|
||||
func (c *Compressor) Handler(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
encoder, encoding, cleanup := c.selectEncoder(r.Header, w)
|
||||
|
||||
cw := &compressResponseWriter{
|
||||
ResponseWriter: w,
|
||||
w: w,
|
||||
contentTypes: c.allowedTypes,
|
||||
contentWildcards: c.allowedWildcards,
|
||||
encoding: encoding,
|
||||
compressable: false, // determined in post-handler
|
||||
}
|
||||
if encoder != nil {
|
||||
cw.w = encoder
|
||||
}
|
||||
// Re-add the encoder to the pool if applicable.
|
||||
defer cleanup()
|
||||
defer cw.Close()
|
||||
|
||||
next.ServeHTTP(cw, r)
|
||||
})
|
||||
}
|
||||
|
||||
// selectEncoder returns the encoder, the name of the encoder, and a closer function.
|
||||
func (c *Compressor) selectEncoder(h http.Header, w io.Writer) (io.Writer, string, func()) {
|
||||
header := h.Get("Accept-Encoding")
|
||||
|
||||
// Parse the names of all accepted algorithms from the header.
|
||||
accepted := strings.Split(strings.ToLower(header), ",")
|
||||
|
||||
// Find supported encoder by accepted list by precedence
|
||||
for _, name := range c.encodingPrecedence {
|
||||
if matchAcceptEncoding(accepted, name) {
|
||||
if pool, ok := c.pooledEncoders[name]; ok {
|
||||
encoder := pool.Get().(ioResetterWriter)
|
||||
cleanup := func() {
|
||||
pool.Put(encoder)
|
||||
}
|
||||
encoder.Reset(w)
|
||||
return encoder, name, cleanup
|
||||
|
||||
}
|
||||
if fn, ok := c.encoders[name]; ok {
|
||||
return fn(w, c.level), name, func() {}
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// No encoder found to match the accepted encoding
|
||||
return nil, "", func() {}
|
||||
}
|
||||
|
||||
func matchAcceptEncoding(accepted []string, encoding string) bool {
|
||||
for _, v := range accepted {
|
||||
if strings.Contains(v, encoding) {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
// An EncoderFunc is a function that wraps the provided io.Writer with a
|
||||
// streaming compression algorithm and returns it.
|
||||
//
|
||||
// In case of failure, the function should return nil.
|
||||
type EncoderFunc func(w io.Writer, level int) io.Writer
|
||||
|
||||
// Interface for types that allow resetting io.Writers.
|
||||
type ioResetterWriter interface {
|
||||
io.Writer
|
||||
Reset(w io.Writer)
|
||||
}
|
||||
|
||||
type compressResponseWriter struct {
|
||||
http.ResponseWriter
|
||||
|
||||
// The streaming encoder writer to be used if there is one. Otherwise,
|
||||
// this is just the normal writer.
|
||||
w io.Writer
|
||||
contentTypes map[string]struct{}
|
||||
contentWildcards map[string]struct{}
|
||||
encoding string
|
||||
wroteHeader bool
|
||||
compressable bool
|
||||
}
|
||||
|
||||
func (cw *compressResponseWriter) isCompressable() bool {
|
||||
// Parse the first part of the Content-Type response header.
|
||||
contentType := cw.Header().Get("Content-Type")
|
||||
if idx := strings.Index(contentType, ";"); idx >= 0 {
|
||||
contentType = contentType[0:idx]
|
||||
}
|
||||
|
||||
// Is the content type compressable?
|
||||
if _, ok := cw.contentTypes[contentType]; ok {
|
||||
return true
|
||||
}
|
||||
if idx := strings.Index(contentType, "/"); idx > 0 {
|
||||
contentType = contentType[0:idx]
|
||||
_, ok := cw.contentWildcards[contentType]
|
||||
return ok
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (cw *compressResponseWriter) WriteHeader(code int) {
|
||||
if cw.wroteHeader {
|
||||
cw.ResponseWriter.WriteHeader(code) // Allow multiple calls to propagate.
|
||||
return
|
||||
}
|
||||
cw.wroteHeader = true
|
||||
defer cw.ResponseWriter.WriteHeader(code)
|
||||
|
||||
// Already compressed data?
|
||||
if cw.Header().Get("Content-Encoding") != "" {
|
||||
return
|
||||
}
|
||||
|
||||
if !cw.isCompressable() {
|
||||
cw.compressable = false
|
||||
return
|
||||
}
|
||||
|
||||
if cw.encoding != "" {
|
||||
cw.compressable = true
|
||||
cw.Header().Set("Content-Encoding", cw.encoding)
|
||||
cw.Header().Set("Vary", "Accept-Encoding")
|
||||
|
||||
// The content-length after compression is unknown
|
||||
cw.Header().Del("Content-Length")
|
||||
}
|
||||
}
|
||||
|
||||
func (cw *compressResponseWriter) Write(p []byte) (int, error) {
|
||||
if !cw.wroteHeader {
|
||||
cw.WriteHeader(http.StatusOK)
|
||||
}
|
||||
|
||||
return cw.writer().Write(p)
|
||||
}
|
||||
|
||||
func (cw *compressResponseWriter) writer() io.Writer {
|
||||
if cw.compressable {
|
||||
return cw.w
|
||||
} else {
|
||||
return cw.ResponseWriter
|
||||
}
|
||||
}
|
||||
|
||||
type compressFlusher interface {
|
||||
Flush() error
|
||||
}
|
||||
|
||||
func (cw *compressResponseWriter) Flush() {
|
||||
if f, ok := cw.writer().(http.Flusher); ok {
|
||||
f.Flush()
|
||||
}
|
||||
// If the underlying writer has a compression flush signature,
|
||||
// call this Flush() method instead
|
||||
if f, ok := cw.writer().(compressFlusher); ok {
|
||||
f.Flush()
|
||||
|
||||
// Also flush the underlying response writer
|
||||
if f, ok := cw.ResponseWriter.(http.Flusher); ok {
|
||||
f.Flush()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (cw *compressResponseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
|
||||
if hj, ok := cw.writer().(http.Hijacker); ok {
|
||||
return hj.Hijack()
|
||||
}
|
||||
return nil, nil, errors.New("chi/middleware: http.Hijacker is unavailable on the writer")
|
||||
}
|
||||
|
||||
func (cw *compressResponseWriter) Push(target string, opts *http.PushOptions) error {
|
||||
if ps, ok := cw.writer().(http.Pusher); ok {
|
||||
return ps.Push(target, opts)
|
||||
}
|
||||
return errors.New("chi/middleware: http.Pusher is unavailable on the writer")
|
||||
}
|
||||
|
||||
func (cw *compressResponseWriter) Close() error {
|
||||
if c, ok := cw.writer().(io.WriteCloser); ok {
|
||||
return c.Close()
|
||||
}
|
||||
return errors.New("chi/middleware: io.WriteCloser is unavailable on the writer")
|
||||
}
|
||||
|
||||
func encoderGzip(w io.Writer, level int) io.Writer {
|
||||
gw, err := gzip.NewWriterLevel(w, level)
|
||||
if err != nil {
|
||||
return nil
|
||||
}
|
||||
return gw
|
||||
}
|
||||
|
||||
func encoderDeflate(w io.Writer, level int) io.Writer {
|
||||
dw, err := flate.NewWriter(w, level)
|
||||
if err != nil {
|
||||
return nil
|
||||
}
|
||||
return dw
|
||||
}
|
||||
|
|
@ -0,0 +1,51 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// ContentCharset generates a handler that writes a 415 Unsupported Media Type response if none of the charsets match.
|
||||
// An empty charset will allow requests with no Content-Type header or no specified charset.
|
||||
func ContentCharset(charsets ...string) func(next http.Handler) http.Handler {
|
||||
for i, c := range charsets {
|
||||
charsets[i] = strings.ToLower(c)
|
||||
}
|
||||
|
||||
return func(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
if !contentEncoding(r.Header.Get("Content-Type"), charsets...) {
|
||||
w.WriteHeader(http.StatusUnsupportedMediaType)
|
||||
return
|
||||
}
|
||||
|
||||
next.ServeHTTP(w, r)
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
// Check the content encoding against a list of acceptable values.
|
||||
func contentEncoding(ce string, charsets ...string) bool {
|
||||
_, ce = split(strings.ToLower(ce), ";")
|
||||
_, ce = split(ce, "charset=")
|
||||
ce, _ = split(ce, ";")
|
||||
for _, c := range charsets {
|
||||
if ce == c {
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
// Split a string in two parts, cleaning any whitespace.
|
||||
func split(str, sep string) (string, string) {
|
||||
var a, b string
|
||||
var parts = strings.SplitN(str, sep, 2)
|
||||
a = strings.TrimSpace(parts[0])
|
||||
if len(parts) == 2 {
|
||||
b = strings.TrimSpace(parts[1])
|
||||
}
|
||||
|
||||
return a, b
|
||||
}
|
||||
|
|
@ -0,0 +1,34 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// AllowContentEncoding enforces a whitelist of request Content-Encoding otherwise responds
|
||||
// with a 415 Unsupported Media Type status.
|
||||
func AllowContentEncoding(contentEncoding ...string) func(next http.Handler) http.Handler {
|
||||
allowedEncodings := make(map[string]struct{}, len(contentEncoding))
|
||||
for _, encoding := range contentEncoding {
|
||||
allowedEncodings[strings.TrimSpace(strings.ToLower(encoding))] = struct{}{}
|
||||
}
|
||||
return func(next http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
requestEncodings := r.Header["Content-Encoding"]
|
||||
// skip check for empty content body or no Content-Encoding
|
||||
if r.ContentLength == 0 {
|
||||
next.ServeHTTP(w, r)
|
||||
return
|
||||
}
|
||||
// All encodings in the request must be allowed
|
||||
for _, encoding := range requestEncodings {
|
||||
if _, ok := allowedEncodings[strings.TrimSpace(strings.ToLower(encoding))]; !ok {
|
||||
w.WriteHeader(http.StatusUnsupportedMediaType)
|
||||
return
|
||||
}
|
||||
}
|
||||
next.ServeHTTP(w, r)
|
||||
}
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,49 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// SetHeader is a convenience handler to set a response header key/value
|
||||
func SetHeader(key, value string) func(next http.Handler) http.Handler {
|
||||
return func(next http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
w.Header().Set(key, value)
|
||||
next.ServeHTTP(w, r)
|
||||
}
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
}
|
||||
|
||||
// AllowContentType enforces a whitelist of request Content-Types otherwise responds
|
||||
// with a 415 Unsupported Media Type status.
|
||||
func AllowContentType(contentTypes ...string) func(next http.Handler) http.Handler {
|
||||
allowedContentTypes := make(map[string]struct{}, len(contentTypes))
|
||||
for _, ctype := range contentTypes {
|
||||
allowedContentTypes[strings.TrimSpace(strings.ToLower(ctype))] = struct{}{}
|
||||
}
|
||||
|
||||
return func(next http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
if r.ContentLength == 0 {
|
||||
// skip check for empty content body
|
||||
next.ServeHTTP(w, r)
|
||||
return
|
||||
}
|
||||
|
||||
s := strings.ToLower(strings.TrimSpace(r.Header.Get("Content-Type")))
|
||||
if i := strings.Index(s, ";"); i > -1 {
|
||||
s = s[0:i]
|
||||
}
|
||||
|
||||
if _, ok := allowedContentTypes[s]; ok {
|
||||
next.ServeHTTP(w, r)
|
||||
return
|
||||
}
|
||||
|
||||
w.WriteHeader(http.StatusUnsupportedMediaType)
|
||||
}
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,39 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
|
||||
"github.com/go-chi/chi/v5"
|
||||
)
|
||||
|
||||
// GetHead automatically route undefined HEAD requests to GET handlers.
|
||||
func GetHead(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
if r.Method == "HEAD" {
|
||||
rctx := chi.RouteContext(r.Context())
|
||||
routePath := rctx.RoutePath
|
||||
if routePath == "" {
|
||||
if r.URL.RawPath != "" {
|
||||
routePath = r.URL.RawPath
|
||||
} else {
|
||||
routePath = r.URL.Path
|
||||
}
|
||||
}
|
||||
|
||||
// Temporary routing context to look-ahead before routing the request
|
||||
tctx := chi.NewRouteContext()
|
||||
|
||||
// Attempt to find a HEAD handler for the routing path, if not found, traverse
|
||||
// the router as through its a GET route, but proceed with the request
|
||||
// with the HEAD method.
|
||||
if !rctx.Routes.Match(tctx, "HEAD", routePath) {
|
||||
rctx.RouteMethod = "GET"
|
||||
rctx.RoutePath = routePath
|
||||
next.ServeHTTP(w, r)
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
next.ServeHTTP(w, r)
|
||||
})
|
||||
}
|
||||
|
|
@ -0,0 +1,26 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// Heartbeat endpoint middleware useful to setting up a path like
|
||||
// `/ping` that load balancers or uptime testing external services
|
||||
// can make a request before hitting any routes. It's also convenient
|
||||
// to place this above ACL middlewares as well.
|
||||
func Heartbeat(endpoint string) func(http.Handler) http.Handler {
|
||||
f := func(h http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
if (r.Method == "GET" || r.Method == "HEAD") && strings.EqualFold(r.URL.Path, endpoint) {
|
||||
w.Header().Set("Content-Type", "text/plain")
|
||||
w.WriteHeader(http.StatusOK)
|
||||
w.Write([]byte("."))
|
||||
return
|
||||
}
|
||||
h.ServeHTTP(w, r)
|
||||
}
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
return f
|
||||
}
|
||||
|
|
@ -0,0 +1,174 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"context"
|
||||
"log"
|
||||
"net/http"
|
||||
"os"
|
||||
"runtime"
|
||||
"time"
|
||||
)
|
||||
|
||||
var (
|
||||
// LogEntryCtxKey is the context.Context key to store the request log entry.
|
||||
LogEntryCtxKey = &contextKey{"LogEntry"}
|
||||
|
||||
// DefaultLogger is called by the Logger middleware handler to log each request.
|
||||
// Its made a package-level variable so that it can be reconfigured for custom
|
||||
// logging configurations.
|
||||
DefaultLogger func(next http.Handler) http.Handler
|
||||
)
|
||||
|
||||
// Logger is a middleware that logs the start and end of each request, along
|
||||
// with some useful data about what was requested, what the response status was,
|
||||
// and how long it took to return. When standard output is a TTY, Logger will
|
||||
// print in color, otherwise it will print in black and white. Logger prints a
|
||||
// request ID if one is provided.
|
||||
//
|
||||
// Alternatively, look at https://github.com/goware/httplog for a more in-depth
|
||||
// http logger with structured logging support.
|
||||
//
|
||||
// IMPORTANT NOTE: Logger should go before any other middleware that may change
|
||||
// the response, such as `middleware.Recoverer`. Example:
|
||||
//
|
||||
// ```go
|
||||
// r := chi.NewRouter()
|
||||
// r.Use(middleware.Logger) // <--<< Logger should come before Recoverer
|
||||
// r.Use(middleware.Recoverer)
|
||||
// r.Get("/", handler)
|
||||
// ```
|
||||
func Logger(next http.Handler) http.Handler {
|
||||
return DefaultLogger(next)
|
||||
}
|
||||
|
||||
// RequestLogger returns a logger handler using a custom LogFormatter.
|
||||
func RequestLogger(f LogFormatter) func(next http.Handler) http.Handler {
|
||||
return func(next http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
entry := f.NewLogEntry(r)
|
||||
ww := NewWrapResponseWriter(w, r.ProtoMajor)
|
||||
|
||||
t1 := time.Now()
|
||||
defer func() {
|
||||
entry.Write(ww.Status(), ww.BytesWritten(), ww.Header(), time.Since(t1), nil)
|
||||
}()
|
||||
|
||||
next.ServeHTTP(ww, WithLogEntry(r, entry))
|
||||
}
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
}
|
||||
|
||||
// LogFormatter initiates the beginning of a new LogEntry per request.
|
||||
// See DefaultLogFormatter for an example implementation.
|
||||
type LogFormatter interface {
|
||||
NewLogEntry(r *http.Request) LogEntry
|
||||
}
|
||||
|
||||
// LogEntry records the final log when a request completes.
|
||||
// See defaultLogEntry for an example implementation.
|
||||
type LogEntry interface {
|
||||
Write(status, bytes int, header http.Header, elapsed time.Duration, extra interface{})
|
||||
Panic(v interface{}, stack []byte)
|
||||
}
|
||||
|
||||
// GetLogEntry returns the in-context LogEntry for a request.
|
||||
func GetLogEntry(r *http.Request) LogEntry {
|
||||
entry, _ := r.Context().Value(LogEntryCtxKey).(LogEntry)
|
||||
return entry
|
||||
}
|
||||
|
||||
// WithLogEntry sets the in-context LogEntry for a request.
|
||||
func WithLogEntry(r *http.Request, entry LogEntry) *http.Request {
|
||||
r = r.WithContext(context.WithValue(r.Context(), LogEntryCtxKey, entry))
|
||||
return r
|
||||
}
|
||||
|
||||
// LoggerInterface accepts printing to stdlib logger or compatible logger.
|
||||
type LoggerInterface interface {
|
||||
Print(v ...interface{})
|
||||
}
|
||||
|
||||
// DefaultLogFormatter is a simple logger that implements a LogFormatter.
|
||||
type DefaultLogFormatter struct {
|
||||
Logger LoggerInterface
|
||||
NoColor bool
|
||||
}
|
||||
|
||||
// NewLogEntry creates a new LogEntry for the request.
|
||||
func (l *DefaultLogFormatter) NewLogEntry(r *http.Request) LogEntry {
|
||||
useColor := !l.NoColor
|
||||
entry := &defaultLogEntry{
|
||||
DefaultLogFormatter: l,
|
||||
request: r,
|
||||
buf: &bytes.Buffer{},
|
||||
useColor: useColor,
|
||||
}
|
||||
|
||||
reqID := GetReqID(r.Context())
|
||||
if reqID != "" {
|
||||
cW(entry.buf, useColor, nYellow, "[%s] ", reqID)
|
||||
}
|
||||
cW(entry.buf, useColor, nCyan, "\"")
|
||||
cW(entry.buf, useColor, bMagenta, "%s ", r.Method)
|
||||
|
||||
scheme := "http"
|
||||
if r.TLS != nil {
|
||||
scheme = "https"
|
||||
}
|
||||
cW(entry.buf, useColor, nCyan, "%s://%s%s %s\" ", scheme, r.Host, r.RequestURI, r.Proto)
|
||||
|
||||
entry.buf.WriteString("from ")
|
||||
entry.buf.WriteString(r.RemoteAddr)
|
||||
entry.buf.WriteString(" - ")
|
||||
|
||||
return entry
|
||||
}
|
||||
|
||||
type defaultLogEntry struct {
|
||||
*DefaultLogFormatter
|
||||
request *http.Request
|
||||
buf *bytes.Buffer
|
||||
useColor bool
|
||||
}
|
||||
|
||||
func (l *defaultLogEntry) Write(status, bytes int, header http.Header, elapsed time.Duration, extra interface{}) {
|
||||
switch {
|
||||
case status < 200:
|
||||
cW(l.buf, l.useColor, bBlue, "%03d", status)
|
||||
case status < 300:
|
||||
cW(l.buf, l.useColor, bGreen, "%03d", status)
|
||||
case status < 400:
|
||||
cW(l.buf, l.useColor, bCyan, "%03d", status)
|
||||
case status < 500:
|
||||
cW(l.buf, l.useColor, bYellow, "%03d", status)
|
||||
default:
|
||||
cW(l.buf, l.useColor, bRed, "%03d", status)
|
||||
}
|
||||
|
||||
cW(l.buf, l.useColor, bBlue, " %dB", bytes)
|
||||
|
||||
l.buf.WriteString(" in ")
|
||||
if elapsed < 500*time.Millisecond {
|
||||
cW(l.buf, l.useColor, nGreen, "%s", elapsed)
|
||||
} else if elapsed < 5*time.Second {
|
||||
cW(l.buf, l.useColor, nYellow, "%s", elapsed)
|
||||
} else {
|
||||
cW(l.buf, l.useColor, nRed, "%s", elapsed)
|
||||
}
|
||||
|
||||
l.Logger.Print(l.buf.String())
|
||||
}
|
||||
|
||||
func (l *defaultLogEntry) Panic(v interface{}, stack []byte) {
|
||||
PrintPrettyStack(v)
|
||||
}
|
||||
|
||||
func init() {
|
||||
color := true
|
||||
if runtime.GOOS == "windows" {
|
||||
color = false
|
||||
}
|
||||
DefaultLogger = RequestLogger(&DefaultLogFormatter{Logger: log.New(os.Stdout, "", log.LstdFlags), NoColor: !color})
|
||||
}
|
||||
|
|
@ -0,0 +1,23 @@
|
|||
package middleware
|
||||
|
||||
import "net/http"
|
||||
|
||||
// New will create a new middleware handler from a http.Handler.
|
||||
func New(h http.Handler) func(next http.Handler) http.Handler {
|
||||
return func(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
h.ServeHTTP(w, r)
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
// contextKey is a value for use with context.WithValue. It's used as
|
||||
// a pointer so it fits in an interface{} without allocation. This technique
|
||||
// for defining context keys was copied from Go 1.7's new use of context in net/http.
|
||||
type contextKey struct {
|
||||
name string
|
||||
}
|
||||
|
||||
func (k *contextKey) String() string {
|
||||
return "chi/middleware context value " + k.name
|
||||
}
|
||||
|
|
@ -0,0 +1,58 @@
|
|||
package middleware
|
||||
|
||||
// Ported from Goji's middleware, source:
|
||||
// https://github.com/zenazn/goji/tree/master/web/middleware
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"time"
|
||||
)
|
||||
|
||||
// Unix epoch time
|
||||
var epoch = time.Unix(0, 0).Format(time.RFC1123)
|
||||
|
||||
// Taken from https://github.com/mytrile/nocache
|
||||
var noCacheHeaders = map[string]string{
|
||||
"Expires": epoch,
|
||||
"Cache-Control": "no-cache, no-store, no-transform, must-revalidate, private, max-age=0",
|
||||
"Pragma": "no-cache",
|
||||
"X-Accel-Expires": "0",
|
||||
}
|
||||
|
||||
var etagHeaders = []string{
|
||||
"ETag",
|
||||
"If-Modified-Since",
|
||||
"If-Match",
|
||||
"If-None-Match",
|
||||
"If-Range",
|
||||
"If-Unmodified-Since",
|
||||
}
|
||||
|
||||
// NoCache is a simple piece of middleware that sets a number of HTTP headers to prevent
|
||||
// a router (or subrouter) from being cached by an upstream proxy and/or client.
|
||||
//
|
||||
// As per http://wiki.nginx.org/HttpProxyModule - NoCache sets:
|
||||
// Expires: Thu, 01 Jan 1970 00:00:00 UTC
|
||||
// Cache-Control: no-cache, private, max-age=0
|
||||
// X-Accel-Expires: 0
|
||||
// Pragma: no-cache (for HTTP/1.0 proxies/clients)
|
||||
func NoCache(h http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
|
||||
// Delete any ETag headers that may have been set
|
||||
for _, v := range etagHeaders {
|
||||
if r.Header.Get(v) != "" {
|
||||
r.Header.Del(v)
|
||||
}
|
||||
}
|
||||
|
||||
// Set our NoCache headers
|
||||
for k, v := range noCacheHeaders {
|
||||
w.Header().Set(k, v)
|
||||
}
|
||||
|
||||
h.ServeHTTP(w, r)
|
||||
}
|
||||
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
|
|
@ -0,0 +1,20 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// PageRoute is a simple middleware which allows you to route a static GET request
|
||||
// at the middleware stack level.
|
||||
func PageRoute(path string, handler http.Handler) func(http.Handler) http.Handler {
|
||||
return func(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
if r.Method == "GET" && strings.EqualFold(r.URL.Path, path) {
|
||||
handler.ServeHTTP(w, r)
|
||||
return
|
||||
}
|
||||
next.ServeHTTP(w, r)
|
||||
})
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,16 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// PathRewrite is a simple middleware which allows you to rewrite the request URL path.
|
||||
func PathRewrite(old, new string) func(http.Handler) http.Handler {
|
||||
return func(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
r.URL.Path = strings.Replace(r.URL.Path, old, new, 1)
|
||||
next.ServeHTTP(w, r)
|
||||
})
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,62 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"expvar"
|
||||
"fmt"
|
||||
"net/http"
|
||||
"net/http/pprof"
|
||||
|
||||
"github.com/go-chi/chi/v5"
|
||||
)
|
||||
|
||||
// Profiler is a convenient subrouter used for mounting net/http/pprof. ie.
|
||||
//
|
||||
// func MyService() http.Handler {
|
||||
// r := chi.NewRouter()
|
||||
// // ..middlewares
|
||||
// r.Mount("/debug", middleware.Profiler())
|
||||
// // ..routes
|
||||
// return r
|
||||
// }
|
||||
func Profiler() http.Handler {
|
||||
r := chi.NewRouter()
|
||||
r.Use(NoCache)
|
||||
|
||||
r.Get("/", func(w http.ResponseWriter, r *http.Request) {
|
||||
http.Redirect(w, r, r.RequestURI+"/pprof/", http.StatusMovedPermanently)
|
||||
})
|
||||
r.HandleFunc("/pprof", func(w http.ResponseWriter, r *http.Request) {
|
||||
http.Redirect(w, r, r.RequestURI+"/", http.StatusMovedPermanently)
|
||||
})
|
||||
|
||||
r.HandleFunc("/pprof/*", pprof.Index)
|
||||
r.HandleFunc("/pprof/cmdline", pprof.Cmdline)
|
||||
r.HandleFunc("/pprof/profile", pprof.Profile)
|
||||
r.HandleFunc("/pprof/symbol", pprof.Symbol)
|
||||
r.HandleFunc("/pprof/trace", pprof.Trace)
|
||||
r.HandleFunc("/vars", expVars)
|
||||
|
||||
r.Handle("/pprof/goroutine", pprof.Handler("goroutine"))
|
||||
r.Handle("/pprof/threadcreate", pprof.Handler("threadcreate"))
|
||||
r.Handle("/pprof/mutex", pprof.Handler("mutex"))
|
||||
r.Handle("/pprof/heap", pprof.Handler("heap"))
|
||||
r.Handle("/pprof/block", pprof.Handler("block"))
|
||||
r.Handle("/pprof/allocs", pprof.Handler("allocs"))
|
||||
|
||||
return r
|
||||
}
|
||||
|
||||
// Replicated from expvar.go as not public.
|
||||
func expVars(w http.ResponseWriter, r *http.Request) {
|
||||
first := true
|
||||
w.Header().Set("Content-Type", "application/json")
|
||||
fmt.Fprintf(w, "{\n")
|
||||
expvar.Do(func(kv expvar.KeyValue) {
|
||||
if !first {
|
||||
fmt.Fprintf(w, ",\n")
|
||||
}
|
||||
first = false
|
||||
fmt.Fprintf(w, "%q: %s", kv.Key, kv.Value)
|
||||
})
|
||||
fmt.Fprintf(w, "\n}\n")
|
||||
}
|
||||
|
|
@ -0,0 +1,54 @@
|
|||
package middleware
|
||||
|
||||
// Ported from Goji's middleware, source:
|
||||
// https://github.com/zenazn/goji/tree/master/web/middleware
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"strings"
|
||||
)
|
||||
|
||||
var xForwardedFor = http.CanonicalHeaderKey("X-Forwarded-For")
|
||||
var xRealIP = http.CanonicalHeaderKey("X-Real-IP")
|
||||
|
||||
// RealIP is a middleware that sets a http.Request's RemoteAddr to the results
|
||||
// of parsing either the X-Real-IP header or the X-Forwarded-For header (in that
|
||||
// order).
|
||||
//
|
||||
// This middleware should be inserted fairly early in the middleware stack to
|
||||
// ensure that subsequent layers (e.g., request loggers) which examine the
|
||||
// RemoteAddr will see the intended value.
|
||||
//
|
||||
// You should only use this middleware if you can trust the headers passed to
|
||||
// you (in particular, the two headers this middleware uses), for example
|
||||
// because you have placed a reverse proxy like HAProxy or nginx in front of
|
||||
// chi. If your reverse proxies are configured to pass along arbitrary header
|
||||
// values from the client, or if you use this middleware without a reverse
|
||||
// proxy, malicious clients will be able to make you very sad (or, depending on
|
||||
// how you're using RemoteAddr, vulnerable to an attack of some sort).
|
||||
func RealIP(h http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
if rip := realIP(r); rip != "" {
|
||||
r.RemoteAddr = rip
|
||||
}
|
||||
h.ServeHTTP(w, r)
|
||||
}
|
||||
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
|
||||
func realIP(r *http.Request) string {
|
||||
var ip string
|
||||
|
||||
if xrip := r.Header.Get(xRealIP); xrip != "" {
|
||||
ip = xrip
|
||||
} else if xff := r.Header.Get(xForwardedFor); xff != "" {
|
||||
i := strings.Index(xff, ", ")
|
||||
if i == -1 {
|
||||
i = len(xff)
|
||||
}
|
||||
ip = xff[:i]
|
||||
}
|
||||
|
||||
return ip
|
||||
}
|
||||
|
|
@ -0,0 +1,197 @@
|
|||
package middleware
|
||||
|
||||
// The original work was derived from Goji's middleware, source:
|
||||
// https://github.com/zenazn/goji/tree/master/web/middleware
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"errors"
|
||||
"fmt"
|
||||
"io"
|
||||
"net/http"
|
||||
"os"
|
||||
"runtime/debug"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// Recoverer is a middleware that recovers from panics, logs the panic (and a
|
||||
// backtrace), and returns a HTTP 500 (Internal Server Error) status if
|
||||
// possible. Recoverer prints a request ID if one is provided.
|
||||
//
|
||||
// Alternatively, look at https://github.com/pressly/lg middleware pkgs.
|
||||
func Recoverer(next http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
defer func() {
|
||||
if rvr := recover(); rvr != nil && rvr != http.ErrAbortHandler {
|
||||
|
||||
logEntry := GetLogEntry(r)
|
||||
if logEntry != nil {
|
||||
logEntry.Panic(rvr, debug.Stack())
|
||||
} else {
|
||||
PrintPrettyStack(rvr)
|
||||
}
|
||||
|
||||
w.WriteHeader(http.StatusInternalServerError)
|
||||
}
|
||||
}()
|
||||
|
||||
next.ServeHTTP(w, r)
|
||||
}
|
||||
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
|
||||
// for ability to test the PrintPrettyStack function
|
||||
var recovererErrorWriter io.Writer = os.Stderr
|
||||
|
||||
func PrintPrettyStack(rvr interface{}) {
|
||||
debugStack := debug.Stack()
|
||||
s := prettyStack{}
|
||||
out, err := s.parse(debugStack, rvr)
|
||||
if err == nil {
|
||||
recovererErrorWriter.Write(out)
|
||||
} else {
|
||||
// print stdlib output as a fallback
|
||||
os.Stderr.Write(debugStack)
|
||||
}
|
||||
}
|
||||
|
||||
type prettyStack struct {
|
||||
}
|
||||
|
||||
func (s prettyStack) parse(debugStack []byte, rvr interface{}) ([]byte, error) {
|
||||
var err error
|
||||
useColor := true
|
||||
buf := &bytes.Buffer{}
|
||||
|
||||
cW(buf, false, bRed, "\n")
|
||||
cW(buf, useColor, bCyan, " panic: ")
|
||||
cW(buf, useColor, bBlue, "%v", rvr)
|
||||
cW(buf, false, bWhite, "\n \n")
|
||||
|
||||
// process debug stack info
|
||||
stack := strings.Split(string(debugStack), "\n")
|
||||
lines := []string{}
|
||||
|
||||
// locate panic line, as we may have nested panics
|
||||
for i := len(stack) - 1; i > 0; i-- {
|
||||
lines = append(lines, stack[i])
|
||||
if strings.HasPrefix(stack[i], "panic(") {
|
||||
lines = lines[0 : len(lines)-2] // remove boilerplate
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
// reverse
|
||||
for i := len(lines)/2 - 1; i >= 0; i-- {
|
||||
opp := len(lines) - 1 - i
|
||||
lines[i], lines[opp] = lines[opp], lines[i]
|
||||
}
|
||||
|
||||
// decorate
|
||||
for i, line := range lines {
|
||||
lines[i], err = s.decorateLine(line, useColor, i)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
for _, l := range lines {
|
||||
fmt.Fprintf(buf, "%s", l)
|
||||
}
|
||||
return buf.Bytes(), nil
|
||||
}
|
||||
|
||||
func (s prettyStack) decorateLine(line string, useColor bool, num int) (string, error) {
|
||||
line = strings.TrimSpace(line)
|
||||
if strings.HasPrefix(line, "\t") || strings.Contains(line, ".go:") {
|
||||
return s.decorateSourceLine(line, useColor, num)
|
||||
} else if strings.HasSuffix(line, ")") {
|
||||
return s.decorateFuncCallLine(line, useColor, num)
|
||||
} else {
|
||||
if strings.HasPrefix(line, "\t") {
|
||||
return strings.Replace(line, "\t", " ", 1), nil
|
||||
} else {
|
||||
return fmt.Sprintf(" %s\n", line), nil
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (s prettyStack) decorateFuncCallLine(line string, useColor bool, num int) (string, error) {
|
||||
idx := strings.LastIndex(line, "(")
|
||||
if idx < 0 {
|
||||
return "", errors.New("not a func call line")
|
||||
}
|
||||
|
||||
buf := &bytes.Buffer{}
|
||||
pkg := line[0:idx]
|
||||
// addr := line[idx:]
|
||||
method := ""
|
||||
|
||||
if idx := strings.LastIndex(pkg, string(os.PathSeparator)); idx < 0 {
|
||||
if idx := strings.Index(pkg, "."); idx > 0 {
|
||||
method = pkg[idx:]
|
||||
pkg = pkg[0:idx]
|
||||
}
|
||||
} else {
|
||||
method = pkg[idx+1:]
|
||||
pkg = pkg[0 : idx+1]
|
||||
if idx := strings.Index(method, "."); idx > 0 {
|
||||
pkg += method[0:idx]
|
||||
method = method[idx:]
|
||||
}
|
||||
}
|
||||
pkgColor := nYellow
|
||||
methodColor := bGreen
|
||||
|
||||
if num == 0 {
|
||||
cW(buf, useColor, bRed, " -> ")
|
||||
pkgColor = bMagenta
|
||||
methodColor = bRed
|
||||
} else {
|
||||
cW(buf, useColor, bWhite, " ")
|
||||
}
|
||||
cW(buf, useColor, pkgColor, "%s", pkg)
|
||||
cW(buf, useColor, methodColor, "%s\n", method)
|
||||
// cW(buf, useColor, nBlack, "%s", addr)
|
||||
return buf.String(), nil
|
||||
}
|
||||
|
||||
func (s prettyStack) decorateSourceLine(line string, useColor bool, num int) (string, error) {
|
||||
idx := strings.LastIndex(line, ".go:")
|
||||
if idx < 0 {
|
||||
return "", errors.New("not a source line")
|
||||
}
|
||||
|
||||
buf := &bytes.Buffer{}
|
||||
path := line[0 : idx+3]
|
||||
lineno := line[idx+3:]
|
||||
|
||||
idx = strings.LastIndex(path, string(os.PathSeparator))
|
||||
dir := path[0 : idx+1]
|
||||
file := path[idx+1:]
|
||||
|
||||
idx = strings.Index(lineno, " ")
|
||||
if idx > 0 {
|
||||
lineno = lineno[0:idx]
|
||||
}
|
||||
fileColor := bCyan
|
||||
lineColor := bGreen
|
||||
|
||||
if num == 1 {
|
||||
cW(buf, useColor, bRed, " -> ")
|
||||
fileColor = bRed
|
||||
lineColor = bMagenta
|
||||
} else {
|
||||
cW(buf, false, bWhite, " ")
|
||||
}
|
||||
cW(buf, useColor, bWhite, "%s", dir)
|
||||
cW(buf, useColor, fileColor, "%s", file)
|
||||
cW(buf, useColor, lineColor, "%s", lineno)
|
||||
if num == 1 {
|
||||
cW(buf, false, bWhite, "\n")
|
||||
}
|
||||
cW(buf, false, bWhite, "\n")
|
||||
|
||||
return buf.String(), nil
|
||||
}
|
||||
|
|
@ -0,0 +1,96 @@
|
|||
package middleware
|
||||
|
||||
// Ported from Goji's middleware, source:
|
||||
// https://github.com/zenazn/goji/tree/master/web/middleware
|
||||
|
||||
import (
|
||||
"context"
|
||||
"crypto/rand"
|
||||
"encoding/base64"
|
||||
"fmt"
|
||||
"net/http"
|
||||
"os"
|
||||
"strings"
|
||||
"sync/atomic"
|
||||
)
|
||||
|
||||
// Key to use when setting the request ID.
|
||||
type ctxKeyRequestID int
|
||||
|
||||
// RequestIDKey is the key that holds the unique request ID in a request context.
|
||||
const RequestIDKey ctxKeyRequestID = 0
|
||||
|
||||
// RequestIDHeader is the name of the HTTP Header which contains the request id.
|
||||
// Exported so that it can be changed by developers
|
||||
var RequestIDHeader = "X-Request-Id"
|
||||
|
||||
var prefix string
|
||||
var reqid uint64
|
||||
|
||||
// A quick note on the statistics here: we're trying to calculate the chance that
|
||||
// two randomly generated base62 prefixes will collide. We use the formula from
|
||||
// http://en.wikipedia.org/wiki/Birthday_problem
|
||||
//
|
||||
// P[m, n] \approx 1 - e^{-m^2/2n}
|
||||
//
|
||||
// We ballpark an upper bound for $m$ by imagining (for whatever reason) a server
|
||||
// that restarts every second over 10 years, for $m = 86400 * 365 * 10 = 315360000$
|
||||
//
|
||||
// For a $k$ character base-62 identifier, we have $n(k) = 62^k$
|
||||
//
|
||||
// Plugging this in, we find $P[m, n(10)] \approx 5.75%$, which is good enough for
|
||||
// our purposes, and is surely more than anyone would ever need in practice -- a
|
||||
// process that is rebooted a handful of times a day for a hundred years has less
|
||||
// than a millionth of a percent chance of generating two colliding IDs.
|
||||
|
||||
func init() {
|
||||
hostname, err := os.Hostname()
|
||||
if hostname == "" || err != nil {
|
||||
hostname = "localhost"
|
||||
}
|
||||
var buf [12]byte
|
||||
var b64 string
|
||||
for len(b64) < 10 {
|
||||
rand.Read(buf[:])
|
||||
b64 = base64.StdEncoding.EncodeToString(buf[:])
|
||||
b64 = strings.NewReplacer("+", "", "/", "").Replace(b64)
|
||||
}
|
||||
|
||||
prefix = fmt.Sprintf("%s/%s", hostname, b64[0:10])
|
||||
}
|
||||
|
||||
// RequestID is a middleware that injects a request ID into the context of each
|
||||
// request. A request ID is a string of the form "host.example.com/random-0001",
|
||||
// where "random" is a base62 random string that uniquely identifies this go
|
||||
// process, and where the last number is an atomically incremented request
|
||||
// counter.
|
||||
func RequestID(next http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
ctx := r.Context()
|
||||
requestID := r.Header.Get(RequestIDHeader)
|
||||
if requestID == "" {
|
||||
myid := atomic.AddUint64(&reqid, 1)
|
||||
requestID = fmt.Sprintf("%s-%06d", prefix, myid)
|
||||
}
|
||||
ctx = context.WithValue(ctx, RequestIDKey, requestID)
|
||||
next.ServeHTTP(w, r.WithContext(ctx))
|
||||
}
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
|
||||
// GetReqID returns a request ID from the given context if one is present.
|
||||
// Returns the empty string if a request ID cannot be found.
|
||||
func GetReqID(ctx context.Context) string {
|
||||
if ctx == nil {
|
||||
return ""
|
||||
}
|
||||
if reqID, ok := ctx.Value(RequestIDKey).(string); ok {
|
||||
return reqID
|
||||
}
|
||||
return ""
|
||||
}
|
||||
|
||||
// NextRequestID generates the next request ID in the sequence.
|
||||
func NextRequestID() uint64 {
|
||||
return atomic.AddUint64(&reqid, 1)
|
||||
}
|
||||
|
|
@ -0,0 +1,160 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// RouteHeaders is a neat little header-based router that allows you to direct
|
||||
// the flow of a request through a middleware stack based on a request header.
|
||||
//
|
||||
// For example, lets say you'd like to setup multiple routers depending on the
|
||||
// request Host header, you could then do something as so:
|
||||
//
|
||||
// r := chi.NewRouter()
|
||||
// rSubdomain := chi.NewRouter()
|
||||
//
|
||||
// r.Use(middleware.RouteHeaders().
|
||||
// Route("Host", "example.com", middleware.New(r)).
|
||||
// Route("Host", "*.example.com", middleware.New(rSubdomain)).
|
||||
// Handler)
|
||||
//
|
||||
// r.Get("/", h)
|
||||
// rSubdomain.Get("/", h2)
|
||||
//
|
||||
//
|
||||
// Another example, imagine you want to setup multiple CORS handlers, where for
|
||||
// your origin servers you allow authorized requests, but for third-party public
|
||||
// requests, authorization is disabled.
|
||||
//
|
||||
// r := chi.NewRouter()
|
||||
//
|
||||
// r.Use(middleware.RouteHeaders().
|
||||
// Route("Origin", "https://app.skyweaver.net", cors.Handler(cors.Options{
|
||||
// AllowedOrigins: []string{"https://api.skyweaver.net"},
|
||||
// AllowedMethods: []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
|
||||
// AllowedHeaders: []string{"Accept", "Authorization", "Content-Type"},
|
||||
// AllowCredentials: true, // <----------<<< allow credentials
|
||||
// })).
|
||||
// Route("Origin", "*", cors.Handler(cors.Options{
|
||||
// AllowedOrigins: []string{"*"},
|
||||
// AllowedMethods: []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
|
||||
// AllowedHeaders: []string{"Accept", "Content-Type"},
|
||||
// AllowCredentials: false, // <----------<<< do not allow credentials
|
||||
// })).
|
||||
// Handler)
|
||||
//
|
||||
func RouteHeaders() HeaderRouter {
|
||||
return HeaderRouter{}
|
||||
}
|
||||
|
||||
type HeaderRouter map[string][]HeaderRoute
|
||||
|
||||
func (hr HeaderRouter) Route(header, match string, middlewareHandler func(next http.Handler) http.Handler) HeaderRouter {
|
||||
header = strings.ToLower(header)
|
||||
k := hr[header]
|
||||
if k == nil {
|
||||
hr[header] = []HeaderRoute{}
|
||||
}
|
||||
hr[header] = append(hr[header], HeaderRoute{MatchOne: NewPattern(match), Middleware: middlewareHandler})
|
||||
return hr
|
||||
}
|
||||
|
||||
func (hr HeaderRouter) RouteAny(header string, match []string, middlewareHandler func(next http.Handler) http.Handler) HeaderRouter {
|
||||
header = strings.ToLower(header)
|
||||
k := hr[header]
|
||||
if k == nil {
|
||||
hr[header] = []HeaderRoute{}
|
||||
}
|
||||
patterns := []Pattern{}
|
||||
for _, m := range match {
|
||||
patterns = append(patterns, NewPattern(m))
|
||||
}
|
||||
hr[header] = append(hr[header], HeaderRoute{MatchAny: patterns, Middleware: middlewareHandler})
|
||||
return hr
|
||||
}
|
||||
|
||||
func (hr HeaderRouter) RouteDefault(handler func(next http.Handler) http.Handler) HeaderRouter {
|
||||
hr["*"] = []HeaderRoute{{Middleware: handler}}
|
||||
return hr
|
||||
}
|
||||
|
||||
func (hr HeaderRouter) Handler(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
if len(hr) == 0 {
|
||||
// skip if no routes set
|
||||
next.ServeHTTP(w, r)
|
||||
}
|
||||
|
||||
// find first matching header route, and continue
|
||||
for header, matchers := range hr {
|
||||
headerValue := r.Header.Get(header)
|
||||
if headerValue == "" {
|
||||
continue
|
||||
}
|
||||
headerValue = strings.ToLower(headerValue)
|
||||
for _, matcher := range matchers {
|
||||
if matcher.IsMatch(headerValue) {
|
||||
matcher.Middleware(next).ServeHTTP(w, r)
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// if no match, check for "*" default route
|
||||
matcher, ok := hr["*"]
|
||||
if !ok || matcher[0].Middleware == nil {
|
||||
next.ServeHTTP(w, r)
|
||||
return
|
||||
}
|
||||
matcher[0].Middleware(next).ServeHTTP(w, r)
|
||||
})
|
||||
}
|
||||
|
||||
type HeaderRoute struct {
|
||||
Middleware func(next http.Handler) http.Handler
|
||||
MatchOne Pattern
|
||||
MatchAny []Pattern
|
||||
}
|
||||
|
||||
func (r HeaderRoute) IsMatch(value string) bool {
|
||||
if len(r.MatchAny) > 0 {
|
||||
for _, m := range r.MatchAny {
|
||||
if m.Match(value) {
|
||||
return true
|
||||
}
|
||||
}
|
||||
} else if r.MatchOne.Match(value) {
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
type Pattern struct {
|
||||
prefix string
|
||||
suffix string
|
||||
wildcard bool
|
||||
}
|
||||
|
||||
func NewPattern(value string) Pattern {
|
||||
p := Pattern{}
|
||||
if i := strings.IndexByte(value, '*'); i >= 0 {
|
||||
p.wildcard = true
|
||||
p.prefix = value[0:i]
|
||||
p.suffix = value[i+1:]
|
||||
} else {
|
||||
p.prefix = value
|
||||
}
|
||||
return p
|
||||
}
|
||||
|
||||
func (p Pattern) Match(v string) bool {
|
||||
if !p.wildcard {
|
||||
if p.prefix == v {
|
||||
return true
|
||||
} else {
|
||||
return false
|
||||
}
|
||||
}
|
||||
return len(v) >= len(p.prefix+p.suffix) && strings.HasPrefix(v, p.prefix) && strings.HasSuffix(v, p.suffix)
|
||||
}
|
||||
|
|
@ -0,0 +1,62 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"net/http"
|
||||
|
||||
"github.com/go-chi/chi/v5"
|
||||
)
|
||||
|
||||
// StripSlashes is a middleware that will match request paths with a trailing
|
||||
// slash, strip it from the path and continue routing through the mux, if a route
|
||||
// matches, then it will serve the handler.
|
||||
func StripSlashes(next http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
var path string
|
||||
rctx := chi.RouteContext(r.Context())
|
||||
if rctx != nil && rctx.RoutePath != "" {
|
||||
path = rctx.RoutePath
|
||||
} else {
|
||||
path = r.URL.Path
|
||||
}
|
||||
if len(path) > 1 && path[len(path)-1] == '/' {
|
||||
newPath := path[:len(path)-1]
|
||||
if rctx == nil {
|
||||
r.URL.Path = newPath
|
||||
} else {
|
||||
rctx.RoutePath = newPath
|
||||
}
|
||||
}
|
||||
next.ServeHTTP(w, r)
|
||||
}
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
|
||||
// RedirectSlashes is a middleware that will match request paths with a trailing
|
||||
// slash and redirect to the same path, less the trailing slash.
|
||||
//
|
||||
// NOTE: RedirectSlashes middleware is *incompatible* with http.FileServer,
|
||||
// see https://github.com/go-chi/chi/issues/343
|
||||
func RedirectSlashes(next http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
var path string
|
||||
rctx := chi.RouteContext(r.Context())
|
||||
if rctx != nil && rctx.RoutePath != "" {
|
||||
path = rctx.RoutePath
|
||||
} else {
|
||||
path = r.URL.Path
|
||||
}
|
||||
if len(path) > 1 && path[len(path)-1] == '/' {
|
||||
if r.URL.RawQuery != "" {
|
||||
path = fmt.Sprintf("%s?%s", path[:len(path)-1], r.URL.RawQuery)
|
||||
} else {
|
||||
path = path[:len(path)-1]
|
||||
}
|
||||
redirectURL := fmt.Sprintf("//%s%s", r.Host, path)
|
||||
http.Redirect(w, r, redirectURL, 301)
|
||||
return
|
||||
}
|
||||
next.ServeHTTP(w, r)
|
||||
}
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
|
|
@ -0,0 +1,63 @@
|
|||
package middleware
|
||||
|
||||
// Ported from Goji's middleware, source:
|
||||
// https://github.com/zenazn/goji/tree/master/web/middleware
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io"
|
||||
"os"
|
||||
)
|
||||
|
||||
var (
|
||||
// Normal colors
|
||||
nBlack = []byte{'\033', '[', '3', '0', 'm'}
|
||||
nRed = []byte{'\033', '[', '3', '1', 'm'}
|
||||
nGreen = []byte{'\033', '[', '3', '2', 'm'}
|
||||
nYellow = []byte{'\033', '[', '3', '3', 'm'}
|
||||
nBlue = []byte{'\033', '[', '3', '4', 'm'}
|
||||
nMagenta = []byte{'\033', '[', '3', '5', 'm'}
|
||||
nCyan = []byte{'\033', '[', '3', '6', 'm'}
|
||||
nWhite = []byte{'\033', '[', '3', '7', 'm'}
|
||||
// Bright colors
|
||||
bBlack = []byte{'\033', '[', '3', '0', ';', '1', 'm'}
|
||||
bRed = []byte{'\033', '[', '3', '1', ';', '1', 'm'}
|
||||
bGreen = []byte{'\033', '[', '3', '2', ';', '1', 'm'}
|
||||
bYellow = []byte{'\033', '[', '3', '3', ';', '1', 'm'}
|
||||
bBlue = []byte{'\033', '[', '3', '4', ';', '1', 'm'}
|
||||
bMagenta = []byte{'\033', '[', '3', '5', ';', '1', 'm'}
|
||||
bCyan = []byte{'\033', '[', '3', '6', ';', '1', 'm'}
|
||||
bWhite = []byte{'\033', '[', '3', '7', ';', '1', 'm'}
|
||||
|
||||
reset = []byte{'\033', '[', '0', 'm'}
|
||||
)
|
||||
|
||||
var IsTTY bool
|
||||
|
||||
func init() {
|
||||
// This is sort of cheating: if stdout is a character device, we assume
|
||||
// that means it's a TTY. Unfortunately, there are many non-TTY
|
||||
// character devices, but fortunately stdout is rarely set to any of
|
||||
// them.
|
||||
//
|
||||
// We could solve this properly by pulling in a dependency on
|
||||
// code.google.com/p/go.crypto/ssh/terminal, for instance, but as a
|
||||
// heuristic for whether to print in color or in black-and-white, I'd
|
||||
// really rather not.
|
||||
fi, err := os.Stdout.Stat()
|
||||
if err == nil {
|
||||
m := os.ModeDevice | os.ModeCharDevice
|
||||
IsTTY = fi.Mode()&m == m
|
||||
}
|
||||
}
|
||||
|
||||
// colorWrite
|
||||
func cW(w io.Writer, useColor bool, color []byte, s string, args ...interface{}) {
|
||||
if IsTTY && useColor {
|
||||
w.Write(color)
|
||||
}
|
||||
fmt.Fprintf(w, s, args...)
|
||||
if IsTTY && useColor {
|
||||
w.Write(reset)
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,132 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"strconv"
|
||||
"time"
|
||||
)
|
||||
|
||||
const (
|
||||
errCapacityExceeded = "Server capacity exceeded."
|
||||
errTimedOut = "Timed out while waiting for a pending request to complete."
|
||||
errContextCanceled = "Context was canceled."
|
||||
)
|
||||
|
||||
var (
|
||||
defaultBacklogTimeout = time.Second * 60
|
||||
)
|
||||
|
||||
// ThrottleOpts represents a set of throttling options.
|
||||
type ThrottleOpts struct {
|
||||
RetryAfterFn func(ctxDone bool) time.Duration
|
||||
Limit int
|
||||
BacklogLimit int
|
||||
BacklogTimeout time.Duration
|
||||
}
|
||||
|
||||
// Throttle is a middleware that limits number of currently processed requests
|
||||
// at a time across all users. Note: Throttle is not a rate-limiter per user,
|
||||
// instead it just puts a ceiling on the number of currentl in-flight requests
|
||||
// being processed from the point from where the Throttle middleware is mounted.
|
||||
func Throttle(limit int) func(http.Handler) http.Handler {
|
||||
return ThrottleWithOpts(ThrottleOpts{Limit: limit, BacklogTimeout: defaultBacklogTimeout})
|
||||
}
|
||||
|
||||
// ThrottleBacklog is a middleware that limits number of currently processed
|
||||
// requests at a time and provides a backlog for holding a finite number of
|
||||
// pending requests.
|
||||
func ThrottleBacklog(limit, backlogLimit int, backlogTimeout time.Duration) func(http.Handler) http.Handler {
|
||||
return ThrottleWithOpts(ThrottleOpts{Limit: limit, BacklogLimit: backlogLimit, BacklogTimeout: backlogTimeout})
|
||||
}
|
||||
|
||||
// ThrottleWithOpts is a middleware that limits number of currently processed requests using passed ThrottleOpts.
|
||||
func ThrottleWithOpts(opts ThrottleOpts) func(http.Handler) http.Handler {
|
||||
if opts.Limit < 1 {
|
||||
panic("chi/middleware: Throttle expects limit > 0")
|
||||
}
|
||||
|
||||
if opts.BacklogLimit < 0 {
|
||||
panic("chi/middleware: Throttle expects backlogLimit to be positive")
|
||||
}
|
||||
|
||||
t := throttler{
|
||||
tokens: make(chan token, opts.Limit),
|
||||
backlogTokens: make(chan token, opts.Limit+opts.BacklogLimit),
|
||||
backlogTimeout: opts.BacklogTimeout,
|
||||
retryAfterFn: opts.RetryAfterFn,
|
||||
}
|
||||
|
||||
// Filling tokens.
|
||||
for i := 0; i < opts.Limit+opts.BacklogLimit; i++ {
|
||||
if i < opts.Limit {
|
||||
t.tokens <- token{}
|
||||
}
|
||||
t.backlogTokens <- token{}
|
||||
}
|
||||
|
||||
return func(next http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
ctx := r.Context()
|
||||
|
||||
select {
|
||||
|
||||
case <-ctx.Done():
|
||||
t.setRetryAfterHeaderIfNeeded(w, true)
|
||||
http.Error(w, errContextCanceled, http.StatusTooManyRequests)
|
||||
return
|
||||
|
||||
case btok := <-t.backlogTokens:
|
||||
timer := time.NewTimer(t.backlogTimeout)
|
||||
|
||||
defer func() {
|
||||
t.backlogTokens <- btok
|
||||
}()
|
||||
|
||||
select {
|
||||
case <-timer.C:
|
||||
t.setRetryAfterHeaderIfNeeded(w, false)
|
||||
http.Error(w, errTimedOut, http.StatusTooManyRequests)
|
||||
return
|
||||
case <-ctx.Done():
|
||||
timer.Stop()
|
||||
t.setRetryAfterHeaderIfNeeded(w, true)
|
||||
http.Error(w, errContextCanceled, http.StatusTooManyRequests)
|
||||
return
|
||||
case tok := <-t.tokens:
|
||||
defer func() {
|
||||
timer.Stop()
|
||||
t.tokens <- tok
|
||||
}()
|
||||
next.ServeHTTP(w, r)
|
||||
}
|
||||
return
|
||||
|
||||
default:
|
||||
t.setRetryAfterHeaderIfNeeded(w, false)
|
||||
http.Error(w, errCapacityExceeded, http.StatusTooManyRequests)
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
}
|
||||
|
||||
// token represents a request that is being processed.
|
||||
type token struct{}
|
||||
|
||||
// throttler limits number of currently processed requests at a time.
|
||||
type throttler struct {
|
||||
tokens chan token
|
||||
backlogTokens chan token
|
||||
retryAfterFn func(ctxDone bool) time.Duration
|
||||
backlogTimeout time.Duration
|
||||
}
|
||||
|
||||
// setRetryAfterHeaderIfNeeded sets Retry-After HTTP header if corresponding retryAfterFn option of throttler is initialized.
|
||||
func (t throttler) setRetryAfterHeaderIfNeeded(w http.ResponseWriter, ctxDone bool) {
|
||||
if t.retryAfterFn == nil {
|
||||
return
|
||||
}
|
||||
w.Header().Set("Retry-After", strconv.Itoa(int(t.retryAfterFn(ctxDone).Seconds())))
|
||||
}
|
||||
|
|
@ -0,0 +1,49 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"context"
|
||||
"net/http"
|
||||
"time"
|
||||
)
|
||||
|
||||
// Timeout is a middleware that cancels ctx after a given timeout and return
|
||||
// a 504 Gateway Timeout error to the client.
|
||||
//
|
||||
// It's required that you select the ctx.Done() channel to check for the signal
|
||||
// if the context has reached its deadline and return, otherwise the timeout
|
||||
// signal will be just ignored.
|
||||
//
|
||||
// ie. a route/handler may look like:
|
||||
//
|
||||
// r.Get("/long", func(w http.ResponseWriter, r *http.Request) {
|
||||
// ctx := r.Context()
|
||||
// processTime := time.Duration(rand.Intn(4)+1) * time.Second
|
||||
//
|
||||
// select {
|
||||
// case <-ctx.Done():
|
||||
// return
|
||||
//
|
||||
// case <-time.After(processTime):
|
||||
// // The above channel simulates some hard work.
|
||||
// }
|
||||
//
|
||||
// w.Write([]byte("done"))
|
||||
// })
|
||||
//
|
||||
func Timeout(timeout time.Duration) func(next http.Handler) http.Handler {
|
||||
return func(next http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
ctx, cancel := context.WithTimeout(r.Context(), timeout)
|
||||
defer func() {
|
||||
cancel()
|
||||
if ctx.Err() == context.DeadlineExceeded {
|
||||
w.WriteHeader(http.StatusGatewayTimeout)
|
||||
}
|
||||
}()
|
||||
|
||||
r = r.WithContext(ctx)
|
||||
next.ServeHTTP(w, r)
|
||||
}
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,72 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"context"
|
||||
"net/http"
|
||||
"strings"
|
||||
|
||||
"github.com/go-chi/chi/v5"
|
||||
)
|
||||
|
||||
var (
|
||||
// URLFormatCtxKey is the context.Context key to store the URL format data
|
||||
// for a request.
|
||||
URLFormatCtxKey = &contextKey{"URLFormat"}
|
||||
)
|
||||
|
||||
// URLFormat is a middleware that parses the url extension from a request path and stores it
|
||||
// on the context as a string under the key `middleware.URLFormatCtxKey`. The middleware will
|
||||
// trim the suffix from the routing path and continue routing.
|
||||
//
|
||||
// Routers should not include a url parameter for the suffix when using this middleware.
|
||||
//
|
||||
// Sample usage.. for url paths: `/articles/1`, `/articles/1.json` and `/articles/1.xml`
|
||||
//
|
||||
// func routes() http.Handler {
|
||||
// r := chi.NewRouter()
|
||||
// r.Use(middleware.URLFormat)
|
||||
//
|
||||
// r.Get("/articles/{id}", ListArticles)
|
||||
//
|
||||
// return r
|
||||
// }
|
||||
//
|
||||
// func ListArticles(w http.ResponseWriter, r *http.Request) {
|
||||
// urlFormat, _ := r.Context().Value(middleware.URLFormatCtxKey).(string)
|
||||
//
|
||||
// switch urlFormat {
|
||||
// case "json":
|
||||
// render.JSON(w, r, articles)
|
||||
// case "xml:"
|
||||
// render.XML(w, r, articles)
|
||||
// default:
|
||||
// render.JSON(w, r, articles)
|
||||
// }
|
||||
// }
|
||||
//
|
||||
func URLFormat(next http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
ctx := r.Context()
|
||||
|
||||
var format string
|
||||
path := r.URL.Path
|
||||
|
||||
if strings.Index(path, ".") > 0 {
|
||||
base := strings.LastIndex(path, "/")
|
||||
idx := strings.LastIndex(path[base:], ".")
|
||||
|
||||
if idx > 0 {
|
||||
idx += base
|
||||
format = path[idx+1:]
|
||||
|
||||
rctx := chi.RouteContext(r.Context())
|
||||
rctx.RoutePath = path[:idx]
|
||||
}
|
||||
}
|
||||
|
||||
r = r.WithContext(context.WithValue(ctx, URLFormatCtxKey, format))
|
||||
|
||||
next.ServeHTTP(w, r)
|
||||
}
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
|
|
@ -0,0 +1,17 @@
|
|||
package middleware
|
||||
|
||||
import (
|
||||
"context"
|
||||
"net/http"
|
||||
)
|
||||
|
||||
// WithValue is a middleware that sets a given key/value in a context chain.
|
||||
func WithValue(key, val interface{}) func(next http.Handler) http.Handler {
|
||||
return func(next http.Handler) http.Handler {
|
||||
fn := func(w http.ResponseWriter, r *http.Request) {
|
||||
r = r.WithContext(context.WithValue(r.Context(), key, val))
|
||||
next.ServeHTTP(w, r)
|
||||
}
|
||||
return http.HandlerFunc(fn)
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,219 @@
|
|||
package middleware
|
||||
|
||||
// The original work was derived from Goji's middleware, source:
|
||||
// https://github.com/zenazn/goji/tree/master/web/middleware
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"io"
|
||||
"net"
|
||||
"net/http"
|
||||
)
|
||||
|
||||
// NewWrapResponseWriter wraps an http.ResponseWriter, returning a proxy that allows you to
|
||||
// hook into various parts of the response process.
|
||||
func NewWrapResponseWriter(w http.ResponseWriter, protoMajor int) WrapResponseWriter {
|
||||
_, fl := w.(http.Flusher)
|
||||
|
||||
bw := basicWriter{ResponseWriter: w}
|
||||
|
||||
if protoMajor == 2 {
|
||||
_, ps := w.(http.Pusher)
|
||||
if fl && ps {
|
||||
return &http2FancyWriter{bw}
|
||||
}
|
||||
} else {
|
||||
_, hj := w.(http.Hijacker)
|
||||
_, rf := w.(io.ReaderFrom)
|
||||
if fl && hj && rf {
|
||||
return &httpFancyWriter{bw}
|
||||
}
|
||||
if fl && hj {
|
||||
return &flushHijackWriter{bw}
|
||||
}
|
||||
if hj {
|
||||
return &hijackWriter{bw}
|
||||
}
|
||||
}
|
||||
|
||||
if fl {
|
||||
return &flushWriter{bw}
|
||||
}
|
||||
|
||||
return &bw
|
||||
}
|
||||
|
||||
// WrapResponseWriter is a proxy around an http.ResponseWriter that allows you to hook
|
||||
// into various parts of the response process.
|
||||
type WrapResponseWriter interface {
|
||||
http.ResponseWriter
|
||||
// Status returns the HTTP status of the request, or 0 if one has not
|
||||
// yet been sent.
|
||||
Status() int
|
||||
// BytesWritten returns the total number of bytes sent to the client.
|
||||
BytesWritten() int
|
||||
// Tee causes the response body to be written to the given io.Writer in
|
||||
// addition to proxying the writes through. Only one io.Writer can be
|
||||
// tee'd to at once: setting a second one will overwrite the first.
|
||||
// Writes will be sent to the proxy before being written to this
|
||||
// io.Writer. It is illegal for the tee'd writer to be modified
|
||||
// concurrently with writes.
|
||||
Tee(io.Writer)
|
||||
// Unwrap returns the original proxied target.
|
||||
Unwrap() http.ResponseWriter
|
||||
}
|
||||
|
||||
// basicWriter wraps a http.ResponseWriter that implements the minimal
|
||||
// http.ResponseWriter interface.
|
||||
type basicWriter struct {
|
||||
http.ResponseWriter
|
||||
wroteHeader bool
|
||||
code int
|
||||
bytes int
|
||||
tee io.Writer
|
||||
}
|
||||
|
||||
func (b *basicWriter) WriteHeader(code int) {
|
||||
if !b.wroteHeader {
|
||||
b.code = code
|
||||
b.wroteHeader = true
|
||||
b.ResponseWriter.WriteHeader(code)
|
||||
}
|
||||
}
|
||||
|
||||
func (b *basicWriter) Write(buf []byte) (int, error) {
|
||||
b.maybeWriteHeader()
|
||||
n, err := b.ResponseWriter.Write(buf)
|
||||
if b.tee != nil {
|
||||
_, err2 := b.tee.Write(buf[:n])
|
||||
// Prefer errors generated by the proxied writer.
|
||||
if err == nil {
|
||||
err = err2
|
||||
}
|
||||
}
|
||||
b.bytes += n
|
||||
return n, err
|
||||
}
|
||||
|
||||
func (b *basicWriter) maybeWriteHeader() {
|
||||
if !b.wroteHeader {
|
||||
b.WriteHeader(http.StatusOK)
|
||||
}
|
||||
}
|
||||
|
||||
func (b *basicWriter) Status() int {
|
||||
return b.code
|
||||
}
|
||||
|
||||
func (b *basicWriter) BytesWritten() int {
|
||||
return b.bytes
|
||||
}
|
||||
|
||||
func (b *basicWriter) Tee(w io.Writer) {
|
||||
b.tee = w
|
||||
}
|
||||
|
||||
func (b *basicWriter) Unwrap() http.ResponseWriter {
|
||||
return b.ResponseWriter
|
||||
}
|
||||
|
||||
// flushWriter ...
|
||||
type flushWriter struct {
|
||||
basicWriter
|
||||
}
|
||||
|
||||
func (f *flushWriter) Flush() {
|
||||
f.wroteHeader = true
|
||||
fl := f.basicWriter.ResponseWriter.(http.Flusher)
|
||||
fl.Flush()
|
||||
}
|
||||
|
||||
var _ http.Flusher = &flushWriter{}
|
||||
|
||||
// hijackWriter ...
|
||||
type hijackWriter struct {
|
||||
basicWriter
|
||||
}
|
||||
|
||||
func (f *hijackWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
|
||||
hj := f.basicWriter.ResponseWriter.(http.Hijacker)
|
||||
return hj.Hijack()
|
||||
}
|
||||
|
||||
var _ http.Hijacker = &hijackWriter{}
|
||||
|
||||
// flushHijackWriter ...
|
||||
type flushHijackWriter struct {
|
||||
basicWriter
|
||||
}
|
||||
|
||||
func (f *flushHijackWriter) Flush() {
|
||||
f.wroteHeader = true
|
||||
fl := f.basicWriter.ResponseWriter.(http.Flusher)
|
||||
fl.Flush()
|
||||
}
|
||||
|
||||
func (f *flushHijackWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
|
||||
hj := f.basicWriter.ResponseWriter.(http.Hijacker)
|
||||
return hj.Hijack()
|
||||
}
|
||||
|
||||
var _ http.Flusher = &flushHijackWriter{}
|
||||
var _ http.Hijacker = &flushHijackWriter{}
|
||||
|
||||
// httpFancyWriter is a HTTP writer that additionally satisfies
|
||||
// http.Flusher, http.Hijacker, and io.ReaderFrom. It exists for the common case
|
||||
// of wrapping the http.ResponseWriter that package http gives you, in order to
|
||||
// make the proxied object support the full method set of the proxied object.
|
||||
type httpFancyWriter struct {
|
||||
basicWriter
|
||||
}
|
||||
|
||||
func (f *httpFancyWriter) Flush() {
|
||||
f.wroteHeader = true
|
||||
fl := f.basicWriter.ResponseWriter.(http.Flusher)
|
||||
fl.Flush()
|
||||
}
|
||||
|
||||
func (f *httpFancyWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
|
||||
hj := f.basicWriter.ResponseWriter.(http.Hijacker)
|
||||
return hj.Hijack()
|
||||
}
|
||||
|
||||
func (f *http2FancyWriter) Push(target string, opts *http.PushOptions) error {
|
||||
return f.basicWriter.ResponseWriter.(http.Pusher).Push(target, opts)
|
||||
}
|
||||
|
||||
func (f *httpFancyWriter) ReadFrom(r io.Reader) (int64, error) {
|
||||
if f.basicWriter.tee != nil {
|
||||
n, err := io.Copy(&f.basicWriter, r)
|
||||
f.basicWriter.bytes += int(n)
|
||||
return n, err
|
||||
}
|
||||
rf := f.basicWriter.ResponseWriter.(io.ReaderFrom)
|
||||
f.basicWriter.maybeWriteHeader()
|
||||
n, err := rf.ReadFrom(r)
|
||||
f.basicWriter.bytes += int(n)
|
||||
return n, err
|
||||
}
|
||||
|
||||
var _ http.Flusher = &httpFancyWriter{}
|
||||
var _ http.Hijacker = &httpFancyWriter{}
|
||||
var _ http.Pusher = &http2FancyWriter{}
|
||||
var _ io.ReaderFrom = &httpFancyWriter{}
|
||||
|
||||
// http2FancyWriter is a HTTP2 writer that additionally satisfies
|
||||
// http.Flusher, and io.ReaderFrom. It exists for the common case
|
||||
// of wrapping the http.ResponseWriter that package http gives you, in order to
|
||||
// make the proxied object support the full method set of the proxied object.
|
||||
type http2FancyWriter struct {
|
||||
basicWriter
|
||||
}
|
||||
|
||||
func (f *http2FancyWriter) Flush() {
|
||||
f.wroteHeader = true
|
||||
fl := f.basicWriter.ResponseWriter.(http.Flusher)
|
||||
fl.Flush()
|
||||
}
|
||||
|
||||
var _ http.Flusher = &http2FancyWriter{}
|
||||
|
|
@ -0,0 +1,485 @@
|
|||
package chi
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"net/http"
|
||||
"strings"
|
||||
"sync"
|
||||
)
|
||||
|
||||
var _ Router = &Mux{}
|
||||
|
||||
// Mux is a simple HTTP route multiplexer that parses a request path,
|
||||
// records any URL params, and executes an end handler. It implements
|
||||
// the http.Handler interface and is friendly with the standard library.
|
||||
//
|
||||
// Mux is designed to be fast, minimal and offer a powerful API for building
|
||||
// modular and composable HTTP services with a large set of handlers. It's
|
||||
// particularly useful for writing large REST API services that break a handler
|
||||
// into many smaller parts composed of middlewares and end handlers.
|
||||
type Mux struct {
|
||||
// The computed mux handler made of the chained middleware stack and
|
||||
// the tree router
|
||||
handler http.Handler
|
||||
|
||||
// The radix trie router
|
||||
tree *node
|
||||
|
||||
// Custom method not allowed handler
|
||||
methodNotAllowedHandler http.HandlerFunc
|
||||
|
||||
// Controls the behaviour of middleware chain generation when a mux
|
||||
// is registered as an inline group inside another mux.
|
||||
parent *Mux
|
||||
|
||||
// Routing context pool
|
||||
pool *sync.Pool
|
||||
|
||||
// Custom route not found handler
|
||||
notFoundHandler http.HandlerFunc
|
||||
|
||||
// The middleware stack
|
||||
middlewares []func(http.Handler) http.Handler
|
||||
|
||||
inline bool
|
||||
}
|
||||
|
||||
// NewMux returns a newly initialized Mux object that implements the Router
|
||||
// interface.
|
||||
func NewMux() *Mux {
|
||||
mux := &Mux{tree: &node{}, pool: &sync.Pool{}}
|
||||
mux.pool.New = func() interface{} {
|
||||
return NewRouteContext()
|
||||
}
|
||||
return mux
|
||||
}
|
||||
|
||||
// ServeHTTP is the single method of the http.Handler interface that makes
|
||||
// Mux interoperable with the standard library. It uses a sync.Pool to get and
|
||||
// reuse routing contexts for each request.
|
||||
func (mx *Mux) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
||||
// Ensure the mux has some routes defined on the mux
|
||||
if mx.handler == nil {
|
||||
mx.NotFoundHandler().ServeHTTP(w, r)
|
||||
return
|
||||
}
|
||||
|
||||
// Check if a routing context already exists from a parent router.
|
||||
rctx, _ := r.Context().Value(RouteCtxKey).(*Context)
|
||||
if rctx != nil {
|
||||
mx.handler.ServeHTTP(w, r)
|
||||
return
|
||||
}
|
||||
|
||||
// Fetch a RouteContext object from the sync pool, and call the computed
|
||||
// mx.handler that is comprised of mx.middlewares + mx.routeHTTP.
|
||||
// Once the request is finished, reset the routing context and put it back
|
||||
// into the pool for reuse from another request.
|
||||
rctx = mx.pool.Get().(*Context)
|
||||
rctx.Reset()
|
||||
rctx.Routes = mx
|
||||
rctx.parentCtx = r.Context()
|
||||
|
||||
// NOTE: r.WithContext() causes 2 allocations and context.WithValue() causes 1 allocation
|
||||
r = r.WithContext(context.WithValue(r.Context(), RouteCtxKey, rctx))
|
||||
|
||||
// Serve the request and once its done, put the request context back in the sync pool
|
||||
mx.handler.ServeHTTP(w, r)
|
||||
mx.pool.Put(rctx)
|
||||
}
|
||||
|
||||
// Use appends a middleware handler to the Mux middleware stack.
|
||||
//
|
||||
// The middleware stack for any Mux will execute before searching for a matching
|
||||
// route to a specific handler, which provides opportunity to respond early,
|
||||
// change the course of the request execution, or set request-scoped values for
|
||||
// the next http.Handler.
|
||||
func (mx *Mux) Use(middlewares ...func(http.Handler) http.Handler) {
|
||||
if mx.handler != nil {
|
||||
panic("chi: all middlewares must be defined before routes on a mux")
|
||||
}
|
||||
mx.middlewares = append(mx.middlewares, middlewares...)
|
||||
}
|
||||
|
||||
// Handle adds the route `pattern` that matches any http method to
|
||||
// execute the `handler` http.Handler.
|
||||
func (mx *Mux) Handle(pattern string, handler http.Handler) {
|
||||
mx.handle(mALL, pattern, handler)
|
||||
}
|
||||
|
||||
// HandleFunc adds the route `pattern` that matches any http method to
|
||||
// execute the `handlerFn` http.HandlerFunc.
|
||||
func (mx *Mux) HandleFunc(pattern string, handlerFn http.HandlerFunc) {
|
||||
mx.handle(mALL, pattern, handlerFn)
|
||||
}
|
||||
|
||||
// Method adds the route `pattern` that matches `method` http method to
|
||||
// execute the `handler` http.Handler.
|
||||
func (mx *Mux) Method(method, pattern string, handler http.Handler) {
|
||||
m, ok := methodMap[strings.ToUpper(method)]
|
||||
if !ok {
|
||||
panic(fmt.Sprintf("chi: '%s' http method is not supported.", method))
|
||||
}
|
||||
mx.handle(m, pattern, handler)
|
||||
}
|
||||
|
||||
// MethodFunc adds the route `pattern` that matches `method` http method to
|
||||
// execute the `handlerFn` http.HandlerFunc.
|
||||
func (mx *Mux) MethodFunc(method, pattern string, handlerFn http.HandlerFunc) {
|
||||
mx.Method(method, pattern, handlerFn)
|
||||
}
|
||||
|
||||
// Connect adds the route `pattern` that matches a CONNECT http method to
|
||||
// execute the `handlerFn` http.HandlerFunc.
|
||||
func (mx *Mux) Connect(pattern string, handlerFn http.HandlerFunc) {
|
||||
mx.handle(mCONNECT, pattern, handlerFn)
|
||||
}
|
||||
|
||||
// Delete adds the route `pattern` that matches a DELETE http method to
|
||||
// execute the `handlerFn` http.HandlerFunc.
|
||||
func (mx *Mux) Delete(pattern string, handlerFn http.HandlerFunc) {
|
||||
mx.handle(mDELETE, pattern, handlerFn)
|
||||
}
|
||||
|
||||
// Get adds the route `pattern` that matches a GET http method to
|
||||
// execute the `handlerFn` http.HandlerFunc.
|
||||
func (mx *Mux) Get(pattern string, handlerFn http.HandlerFunc) {
|
||||
mx.handle(mGET, pattern, handlerFn)
|
||||
}
|
||||
|
||||
// Head adds the route `pattern` that matches a HEAD http method to
|
||||
// execute the `handlerFn` http.HandlerFunc.
|
||||
func (mx *Mux) Head(pattern string, handlerFn http.HandlerFunc) {
|
||||
mx.handle(mHEAD, pattern, handlerFn)
|
||||
}
|
||||
|
||||
// Options adds the route `pattern` that matches a OPTIONS http method to
|
||||
// execute the `handlerFn` http.HandlerFunc.
|
||||
func (mx *Mux) Options(pattern string, handlerFn http.HandlerFunc) {
|
||||
mx.handle(mOPTIONS, pattern, handlerFn)
|
||||
}
|
||||
|
||||
// Patch adds the route `pattern` that matches a PATCH http method to
|
||||
// execute the `handlerFn` http.HandlerFunc.
|
||||
func (mx *Mux) Patch(pattern string, handlerFn http.HandlerFunc) {
|
||||
mx.handle(mPATCH, pattern, handlerFn)
|
||||
}
|
||||
|
||||
// Post adds the route `pattern` that matches a POST http method to
|
||||
// execute the `handlerFn` http.HandlerFunc.
|
||||
func (mx *Mux) Post(pattern string, handlerFn http.HandlerFunc) {
|
||||
mx.handle(mPOST, pattern, handlerFn)
|
||||
}
|
||||
|
||||
// Put adds the route `pattern` that matches a PUT http method to
|
||||
// execute the `handlerFn` http.HandlerFunc.
|
||||
func (mx *Mux) Put(pattern string, handlerFn http.HandlerFunc) {
|
||||
mx.handle(mPUT, pattern, handlerFn)
|
||||
}
|
||||
|
||||
// Trace adds the route `pattern` that matches a TRACE http method to
|
||||
// execute the `handlerFn` http.HandlerFunc.
|
||||
func (mx *Mux) Trace(pattern string, handlerFn http.HandlerFunc) {
|
||||
mx.handle(mTRACE, pattern, handlerFn)
|
||||
}
|
||||
|
||||
// NotFound sets a custom http.HandlerFunc for routing paths that could
|
||||
// not be found. The default 404 handler is `http.NotFound`.
|
||||
func (mx *Mux) NotFound(handlerFn http.HandlerFunc) {
|
||||
// Build NotFound handler chain
|
||||
m := mx
|
||||
hFn := handlerFn
|
||||
if mx.inline && mx.parent != nil {
|
||||
m = mx.parent
|
||||
hFn = Chain(mx.middlewares...).HandlerFunc(hFn).ServeHTTP
|
||||
}
|
||||
|
||||
// Update the notFoundHandler from this point forward
|
||||
m.notFoundHandler = hFn
|
||||
m.updateSubRoutes(func(subMux *Mux) {
|
||||
if subMux.notFoundHandler == nil {
|
||||
subMux.NotFound(hFn)
|
||||
}
|
||||
})
|
||||
}
|
||||
|
||||
// MethodNotAllowed sets a custom http.HandlerFunc for routing paths where the
|
||||
// method is unresolved. The default handler returns a 405 with an empty body.
|
||||
func (mx *Mux) MethodNotAllowed(handlerFn http.HandlerFunc) {
|
||||
// Build MethodNotAllowed handler chain
|
||||
m := mx
|
||||
hFn := handlerFn
|
||||
if mx.inline && mx.parent != nil {
|
||||
m = mx.parent
|
||||
hFn = Chain(mx.middlewares...).HandlerFunc(hFn).ServeHTTP
|
||||
}
|
||||
|
||||
// Update the methodNotAllowedHandler from this point forward
|
||||
m.methodNotAllowedHandler = hFn
|
||||
m.updateSubRoutes(func(subMux *Mux) {
|
||||
if subMux.methodNotAllowedHandler == nil {
|
||||
subMux.MethodNotAllowed(hFn)
|
||||
}
|
||||
})
|
||||
}
|
||||
|
||||
// With adds inline middlewares for an endpoint handler.
|
||||
func (mx *Mux) With(middlewares ...func(http.Handler) http.Handler) Router {
|
||||
// Similarly as in handle(), we must build the mux handler once additional
|
||||
// middleware registration isn't allowed for this stack, like now.
|
||||
if !mx.inline && mx.handler == nil {
|
||||
mx.updateRouteHandler()
|
||||
}
|
||||
|
||||
// Copy middlewares from parent inline muxs
|
||||
var mws Middlewares
|
||||
if mx.inline {
|
||||
mws = make(Middlewares, len(mx.middlewares))
|
||||
copy(mws, mx.middlewares)
|
||||
}
|
||||
mws = append(mws, middlewares...)
|
||||
|
||||
im := &Mux{
|
||||
pool: mx.pool, inline: true, parent: mx, tree: mx.tree, middlewares: mws,
|
||||
notFoundHandler: mx.notFoundHandler, methodNotAllowedHandler: mx.methodNotAllowedHandler,
|
||||
}
|
||||
|
||||
return im
|
||||
}
|
||||
|
||||
// Group creates a new inline-Mux with a fresh middleware stack. It's useful
|
||||
// for a group of handlers along the same routing path that use an additional
|
||||
// set of middlewares. See _examples/.
|
||||
func (mx *Mux) Group(fn func(r Router)) Router {
|
||||
im := mx.With().(*Mux)
|
||||
if fn != nil {
|
||||
fn(im)
|
||||
}
|
||||
return im
|
||||
}
|
||||
|
||||
// Route creates a new Mux with a fresh middleware stack and mounts it
|
||||
// along the `pattern` as a subrouter. Effectively, this is a short-hand
|
||||
// call to Mount. See _examples/.
|
||||
func (mx *Mux) Route(pattern string, fn func(r Router)) Router {
|
||||
if fn == nil {
|
||||
panic(fmt.Sprintf("chi: attempting to Route() a nil subrouter on '%s'", pattern))
|
||||
}
|
||||
subRouter := NewRouter()
|
||||
fn(subRouter)
|
||||
mx.Mount(pattern, subRouter)
|
||||
return subRouter
|
||||
}
|
||||
|
||||
// Mount attaches another http.Handler or chi Router as a subrouter along a routing
|
||||
// path. It's very useful to split up a large API as many independent routers and
|
||||
// compose them as a single service using Mount. See _examples/.
|
||||
//
|
||||
// Note that Mount() simply sets a wildcard along the `pattern` that will continue
|
||||
// routing at the `handler`, which in most cases is another chi.Router. As a result,
|
||||
// if you define two Mount() routes on the exact same pattern the mount will panic.
|
||||
func (mx *Mux) Mount(pattern string, handler http.Handler) {
|
||||
if handler == nil {
|
||||
panic(fmt.Sprintf("chi: attempting to Mount() a nil handler on '%s'", pattern))
|
||||
}
|
||||
|
||||
// Provide runtime safety for ensuring a pattern isn't mounted on an existing
|
||||
// routing pattern.
|
||||
if mx.tree.findPattern(pattern+"*") || mx.tree.findPattern(pattern+"/*") {
|
||||
panic(fmt.Sprintf("chi: attempting to Mount() a handler on an existing path, '%s'", pattern))
|
||||
}
|
||||
|
||||
// Assign sub-Router's with the parent not found & method not allowed handler if not specified.
|
||||
subr, ok := handler.(*Mux)
|
||||
if ok && subr.notFoundHandler == nil && mx.notFoundHandler != nil {
|
||||
subr.NotFound(mx.notFoundHandler)
|
||||
}
|
||||
if ok && subr.methodNotAllowedHandler == nil && mx.methodNotAllowedHandler != nil {
|
||||
subr.MethodNotAllowed(mx.methodNotAllowedHandler)
|
||||
}
|
||||
|
||||
mountHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
rctx := RouteContext(r.Context())
|
||||
|
||||
// shift the url path past the previous subrouter
|
||||
rctx.RoutePath = mx.nextRoutePath(rctx)
|
||||
|
||||
// reset the wildcard URLParam which connects the subrouter
|
||||
n := len(rctx.URLParams.Keys) - 1
|
||||
if n >= 0 && rctx.URLParams.Keys[n] == "*" && len(rctx.URLParams.Values) > n {
|
||||
rctx.URLParams.Values[n] = ""
|
||||
}
|
||||
|
||||
handler.ServeHTTP(w, r)
|
||||
})
|
||||
|
||||
if pattern == "" || pattern[len(pattern)-1] != '/' {
|
||||
mx.handle(mALL|mSTUB, pattern, mountHandler)
|
||||
mx.handle(mALL|mSTUB, pattern+"/", mountHandler)
|
||||
pattern += "/"
|
||||
}
|
||||
|
||||
method := mALL
|
||||
subroutes, _ := handler.(Routes)
|
||||
if subroutes != nil {
|
||||
method |= mSTUB
|
||||
}
|
||||
n := mx.handle(method, pattern+"*", mountHandler)
|
||||
|
||||
if subroutes != nil {
|
||||
n.subroutes = subroutes
|
||||
}
|
||||
}
|
||||
|
||||
// Routes returns a slice of routing information from the tree,
|
||||
// useful for traversing available routes of a router.
|
||||
func (mx *Mux) Routes() []Route {
|
||||
return mx.tree.routes()
|
||||
}
|
||||
|
||||
// Middlewares returns a slice of middleware handler functions.
|
||||
func (mx *Mux) Middlewares() Middlewares {
|
||||
return mx.middlewares
|
||||
}
|
||||
|
||||
// Match searches the routing tree for a handler that matches the method/path.
|
||||
// It's similar to routing a http request, but without executing the handler
|
||||
// thereafter.
|
||||
//
|
||||
// Note: the *Context state is updated during execution, so manage
|
||||
// the state carefully or make a NewRouteContext().
|
||||
func (mx *Mux) Match(rctx *Context, method, path string) bool {
|
||||
m, ok := methodMap[method]
|
||||
if !ok {
|
||||
return false
|
||||
}
|
||||
|
||||
node, _, h := mx.tree.FindRoute(rctx, m, path)
|
||||
|
||||
if node != nil && node.subroutes != nil {
|
||||
rctx.RoutePath = mx.nextRoutePath(rctx)
|
||||
return node.subroutes.Match(rctx, method, rctx.RoutePath)
|
||||
}
|
||||
|
||||
return h != nil
|
||||
}
|
||||
|
||||
// NotFoundHandler returns the default Mux 404 responder whenever a route
|
||||
// cannot be found.
|
||||
func (mx *Mux) NotFoundHandler() http.HandlerFunc {
|
||||
if mx.notFoundHandler != nil {
|
||||
return mx.notFoundHandler
|
||||
}
|
||||
return http.NotFound
|
||||
}
|
||||
|
||||
// MethodNotAllowedHandler returns the default Mux 405 responder whenever
|
||||
// a method cannot be resolved for a route.
|
||||
func (mx *Mux) MethodNotAllowedHandler() http.HandlerFunc {
|
||||
if mx.methodNotAllowedHandler != nil {
|
||||
return mx.methodNotAllowedHandler
|
||||
}
|
||||
return methodNotAllowedHandler
|
||||
}
|
||||
|
||||
// handle registers a http.Handler in the routing tree for a particular http method
|
||||
// and routing pattern.
|
||||
func (mx *Mux) handle(method methodTyp, pattern string, handler http.Handler) *node {
|
||||
if len(pattern) == 0 || pattern[0] != '/' {
|
||||
panic(fmt.Sprintf("chi: routing pattern must begin with '/' in '%s'", pattern))
|
||||
}
|
||||
|
||||
// Build the computed routing handler for this routing pattern.
|
||||
if !mx.inline && mx.handler == nil {
|
||||
mx.updateRouteHandler()
|
||||
}
|
||||
|
||||
// Build endpoint handler with inline middlewares for the route
|
||||
var h http.Handler
|
||||
if mx.inline {
|
||||
mx.handler = http.HandlerFunc(mx.routeHTTP)
|
||||
h = Chain(mx.middlewares...).Handler(handler)
|
||||
} else {
|
||||
h = handler
|
||||
}
|
||||
|
||||
// Add the endpoint to the tree and return the node
|
||||
return mx.tree.InsertRoute(method, pattern, h)
|
||||
}
|
||||
|
||||
// routeHTTP routes a http.Request through the Mux routing tree to serve
|
||||
// the matching handler for a particular http method.
|
||||
func (mx *Mux) routeHTTP(w http.ResponseWriter, r *http.Request) {
|
||||
// Grab the route context object
|
||||
rctx := r.Context().Value(RouteCtxKey).(*Context)
|
||||
|
||||
// The request routing path
|
||||
routePath := rctx.RoutePath
|
||||
if routePath == "" {
|
||||
if r.URL.RawPath != "" {
|
||||
routePath = r.URL.RawPath
|
||||
} else {
|
||||
routePath = r.URL.Path
|
||||
}
|
||||
if routePath == "" {
|
||||
routePath = "/"
|
||||
}
|
||||
}
|
||||
|
||||
// Check if method is supported by chi
|
||||
if rctx.RouteMethod == "" {
|
||||
rctx.RouteMethod = r.Method
|
||||
}
|
||||
method, ok := methodMap[rctx.RouteMethod]
|
||||
if !ok {
|
||||
mx.MethodNotAllowedHandler().ServeHTTP(w, r)
|
||||
return
|
||||
}
|
||||
|
||||
// Find the route
|
||||
if _, _, h := mx.tree.FindRoute(rctx, method, routePath); h != nil {
|
||||
h.ServeHTTP(w, r)
|
||||
return
|
||||
}
|
||||
if rctx.methodNotAllowed {
|
||||
mx.MethodNotAllowedHandler().ServeHTTP(w, r)
|
||||
} else {
|
||||
mx.NotFoundHandler().ServeHTTP(w, r)
|
||||
}
|
||||
}
|
||||
|
||||
func (mx *Mux) nextRoutePath(rctx *Context) string {
|
||||
routePath := "/"
|
||||
nx := len(rctx.routeParams.Keys) - 1 // index of last param in list
|
||||
if nx >= 0 && rctx.routeParams.Keys[nx] == "*" && len(rctx.routeParams.Values) > nx {
|
||||
routePath = "/" + rctx.routeParams.Values[nx]
|
||||
}
|
||||
return routePath
|
||||
}
|
||||
|
||||
// Recursively update data on child routers.
|
||||
func (mx *Mux) updateSubRoutes(fn func(subMux *Mux)) {
|
||||
for _, r := range mx.tree.routes() {
|
||||
subMux, ok := r.SubRoutes.(*Mux)
|
||||
if !ok {
|
||||
continue
|
||||
}
|
||||
fn(subMux)
|
||||
}
|
||||
}
|
||||
|
||||
// updateRouteHandler builds the single mux handler that is a chain of the middleware
|
||||
// stack, as defined by calls to Use(), and the tree router (Mux) itself. After this
|
||||
// point, no other middlewares can be registered on this Mux's stack. But you can still
|
||||
// compose additional middlewares via Group()'s or using a chained middleware handler.
|
||||
func (mx *Mux) updateRouteHandler() {
|
||||
mx.handler = chain(mx.middlewares, http.HandlerFunc(mx.routeHTTP))
|
||||
}
|
||||
|
||||
// methodNotAllowedHandler is a helper function to respond with a 405,
|
||||
// method not allowed.
|
||||
func methodNotAllowedHandler(w http.ResponseWriter, r *http.Request) {
|
||||
w.WriteHeader(405)
|
||||
w.Write(nil)
|
||||
}
|
||||
|
|
@ -0,0 +1,866 @@
|
|||
package chi
|
||||
|
||||
// Radix tree implementation below is a based on the original work by
|
||||
// Armon Dadgar in https://github.com/armon/go-radix/blob/master/radix.go
|
||||
// (MIT licensed). It's been heavily modified for use as a HTTP routing tree.
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"net/http"
|
||||
"regexp"
|
||||
"sort"
|
||||
"strconv"
|
||||
"strings"
|
||||
)
|
||||
|
||||
type methodTyp uint
|
||||
|
||||
const (
|
||||
mSTUB methodTyp = 1 << iota
|
||||
mCONNECT
|
||||
mDELETE
|
||||
mGET
|
||||
mHEAD
|
||||
mOPTIONS
|
||||
mPATCH
|
||||
mPOST
|
||||
mPUT
|
||||
mTRACE
|
||||
)
|
||||
|
||||
var mALL = mCONNECT | mDELETE | mGET | mHEAD |
|
||||
mOPTIONS | mPATCH | mPOST | mPUT | mTRACE
|
||||
|
||||
var methodMap = map[string]methodTyp{
|
||||
http.MethodConnect: mCONNECT,
|
||||
http.MethodDelete: mDELETE,
|
||||
http.MethodGet: mGET,
|
||||
http.MethodHead: mHEAD,
|
||||
http.MethodOptions: mOPTIONS,
|
||||
http.MethodPatch: mPATCH,
|
||||
http.MethodPost: mPOST,
|
||||
http.MethodPut: mPUT,
|
||||
http.MethodTrace: mTRACE,
|
||||
}
|
||||
|
||||
// RegisterMethod adds support for custom HTTP method handlers, available
|
||||
// via Router#Method and Router#MethodFunc
|
||||
func RegisterMethod(method string) {
|
||||
if method == "" {
|
||||
return
|
||||
}
|
||||
method = strings.ToUpper(method)
|
||||
if _, ok := methodMap[method]; ok {
|
||||
return
|
||||
}
|
||||
n := len(methodMap)
|
||||
if n > strconv.IntSize-2 {
|
||||
panic(fmt.Sprintf("chi: max number of methods reached (%d)", strconv.IntSize))
|
||||
}
|
||||
mt := methodTyp(2 << n)
|
||||
methodMap[method] = mt
|
||||
mALL |= mt
|
||||
}
|
||||
|
||||
type nodeTyp uint8
|
||||
|
||||
const (
|
||||
ntStatic nodeTyp = iota // /home
|
||||
ntRegexp // /{id:[0-9]+}
|
||||
ntParam // /{user}
|
||||
ntCatchAll // /api/v1/*
|
||||
)
|
||||
|
||||
type node struct {
|
||||
// subroutes on the leaf node
|
||||
subroutes Routes
|
||||
|
||||
// regexp matcher for regexp nodes
|
||||
rex *regexp.Regexp
|
||||
|
||||
// HTTP handler endpoints on the leaf node
|
||||
endpoints endpoints
|
||||
|
||||
// prefix is the common prefix we ignore
|
||||
prefix string
|
||||
|
||||
// child nodes should be stored in-order for iteration,
|
||||
// in groups of the node type.
|
||||
children [ntCatchAll + 1]nodes
|
||||
|
||||
// first byte of the child prefix
|
||||
tail byte
|
||||
|
||||
// node type: static, regexp, param, catchAll
|
||||
typ nodeTyp
|
||||
|
||||
// first byte of the prefix
|
||||
label byte
|
||||
}
|
||||
|
||||
// endpoints is a mapping of http method constants to handlers
|
||||
// for a given route.
|
||||
type endpoints map[methodTyp]*endpoint
|
||||
|
||||
type endpoint struct {
|
||||
// endpoint handler
|
||||
handler http.Handler
|
||||
|
||||
// pattern is the routing pattern for handler nodes
|
||||
pattern string
|
||||
|
||||
// parameter keys recorded on handler nodes
|
||||
paramKeys []string
|
||||
}
|
||||
|
||||
func (s endpoints) Value(method methodTyp) *endpoint {
|
||||
mh, ok := s[method]
|
||||
if !ok {
|
||||
mh = &endpoint{}
|
||||
s[method] = mh
|
||||
}
|
||||
return mh
|
||||
}
|
||||
|
||||
func (n *node) InsertRoute(method methodTyp, pattern string, handler http.Handler) *node {
|
||||
var parent *node
|
||||
search := pattern
|
||||
|
||||
for {
|
||||
// Handle key exhaustion
|
||||
if len(search) == 0 {
|
||||
// Insert or update the node's leaf handler
|
||||
n.setEndpoint(method, handler, pattern)
|
||||
return n
|
||||
}
|
||||
|
||||
// We're going to be searching for a wild node next,
|
||||
// in this case, we need to get the tail
|
||||
var label = search[0]
|
||||
var segTail byte
|
||||
var segEndIdx int
|
||||
var segTyp nodeTyp
|
||||
var segRexpat string
|
||||
if label == '{' || label == '*' {
|
||||
segTyp, _, segRexpat, segTail, _, segEndIdx = patNextSegment(search)
|
||||
}
|
||||
|
||||
var prefix string
|
||||
if segTyp == ntRegexp {
|
||||
prefix = segRexpat
|
||||
}
|
||||
|
||||
// Look for the edge to attach to
|
||||
parent = n
|
||||
n = n.getEdge(segTyp, label, segTail, prefix)
|
||||
|
||||
// No edge, create one
|
||||
if n == nil {
|
||||
child := &node{label: label, tail: segTail, prefix: search}
|
||||
hn := parent.addChild(child, search)
|
||||
hn.setEndpoint(method, handler, pattern)
|
||||
|
||||
return hn
|
||||
}
|
||||
|
||||
// Found an edge to match the pattern
|
||||
|
||||
if n.typ > ntStatic {
|
||||
// We found a param node, trim the param from the search path and continue.
|
||||
// This param/wild pattern segment would already be on the tree from a previous
|
||||
// call to addChild when creating a new node.
|
||||
search = search[segEndIdx:]
|
||||
continue
|
||||
}
|
||||
|
||||
// Static nodes fall below here.
|
||||
// Determine longest prefix of the search key on match.
|
||||
commonPrefix := longestPrefix(search, n.prefix)
|
||||
if commonPrefix == len(n.prefix) {
|
||||
// the common prefix is as long as the current node's prefix we're attempting to insert.
|
||||
// keep the search going.
|
||||
search = search[commonPrefix:]
|
||||
continue
|
||||
}
|
||||
|
||||
// Split the node
|
||||
child := &node{
|
||||
typ: ntStatic,
|
||||
prefix: search[:commonPrefix],
|
||||
}
|
||||
parent.replaceChild(search[0], segTail, child)
|
||||
|
||||
// Restore the existing node
|
||||
n.label = n.prefix[commonPrefix]
|
||||
n.prefix = n.prefix[commonPrefix:]
|
||||
child.addChild(n, n.prefix)
|
||||
|
||||
// If the new key is a subset, set the method/handler on this node and finish.
|
||||
search = search[commonPrefix:]
|
||||
if len(search) == 0 {
|
||||
child.setEndpoint(method, handler, pattern)
|
||||
return child
|
||||
}
|
||||
|
||||
// Create a new edge for the node
|
||||
subchild := &node{
|
||||
typ: ntStatic,
|
||||
label: search[0],
|
||||
prefix: search,
|
||||
}
|
||||
hn := child.addChild(subchild, search)
|
||||
hn.setEndpoint(method, handler, pattern)
|
||||
return hn
|
||||
}
|
||||
}
|
||||
|
||||
// addChild appends the new `child` node to the tree using the `pattern` as the trie key.
|
||||
// For a URL router like chi's, we split the static, param, regexp and wildcard segments
|
||||
// into different nodes. In addition, addChild will recursively call itself until every
|
||||
// pattern segment is added to the url pattern tree as individual nodes, depending on type.
|
||||
func (n *node) addChild(child *node, prefix string) *node {
|
||||
search := prefix
|
||||
|
||||
// handler leaf node added to the tree is the child.
|
||||
// this may be overridden later down the flow
|
||||
hn := child
|
||||
|
||||
// Parse next segment
|
||||
segTyp, _, segRexpat, segTail, segStartIdx, segEndIdx := patNextSegment(search)
|
||||
|
||||
// Add child depending on next up segment
|
||||
switch segTyp {
|
||||
|
||||
case ntStatic:
|
||||
// Search prefix is all static (that is, has no params in path)
|
||||
// noop
|
||||
|
||||
default:
|
||||
// Search prefix contains a param, regexp or wildcard
|
||||
|
||||
if segTyp == ntRegexp {
|
||||
rex, err := regexp.Compile(segRexpat)
|
||||
if err != nil {
|
||||
panic(fmt.Sprintf("chi: invalid regexp pattern '%s' in route param", segRexpat))
|
||||
}
|
||||
child.prefix = segRexpat
|
||||
child.rex = rex
|
||||
}
|
||||
|
||||
if segStartIdx == 0 {
|
||||
// Route starts with a param
|
||||
child.typ = segTyp
|
||||
|
||||
if segTyp == ntCatchAll {
|
||||
segStartIdx = -1
|
||||
} else {
|
||||
segStartIdx = segEndIdx
|
||||
}
|
||||
if segStartIdx < 0 {
|
||||
segStartIdx = len(search)
|
||||
}
|
||||
child.tail = segTail // for params, we set the tail
|
||||
|
||||
if segStartIdx != len(search) {
|
||||
// add static edge for the remaining part, split the end.
|
||||
// its not possible to have adjacent param nodes, so its certainly
|
||||
// going to be a static node next.
|
||||
|
||||
search = search[segStartIdx:] // advance search position
|
||||
|
||||
nn := &node{
|
||||
typ: ntStatic,
|
||||
label: search[0],
|
||||
prefix: search,
|
||||
}
|
||||
hn = child.addChild(nn, search)
|
||||
}
|
||||
|
||||
} else if segStartIdx > 0 {
|
||||
// Route has some param
|
||||
|
||||
// starts with a static segment
|
||||
child.typ = ntStatic
|
||||
child.prefix = search[:segStartIdx]
|
||||
child.rex = nil
|
||||
|
||||
// add the param edge node
|
||||
search = search[segStartIdx:]
|
||||
|
||||
nn := &node{
|
||||
typ: segTyp,
|
||||
label: search[0],
|
||||
tail: segTail,
|
||||
}
|
||||
hn = child.addChild(nn, search)
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
n.children[child.typ] = append(n.children[child.typ], child)
|
||||
n.children[child.typ].Sort()
|
||||
return hn
|
||||
}
|
||||
|
||||
func (n *node) replaceChild(label, tail byte, child *node) {
|
||||
for i := 0; i < len(n.children[child.typ]); i++ {
|
||||
if n.children[child.typ][i].label == label && n.children[child.typ][i].tail == tail {
|
||||
n.children[child.typ][i] = child
|
||||
n.children[child.typ][i].label = label
|
||||
n.children[child.typ][i].tail = tail
|
||||
return
|
||||
}
|
||||
}
|
||||
panic("chi: replacing missing child")
|
||||
}
|
||||
|
||||
func (n *node) getEdge(ntyp nodeTyp, label, tail byte, prefix string) *node {
|
||||
nds := n.children[ntyp]
|
||||
for i := 0; i < len(nds); i++ {
|
||||
if nds[i].label == label && nds[i].tail == tail {
|
||||
if ntyp == ntRegexp && nds[i].prefix != prefix {
|
||||
continue
|
||||
}
|
||||
return nds[i]
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (n *node) setEndpoint(method methodTyp, handler http.Handler, pattern string) {
|
||||
// Set the handler for the method type on the node
|
||||
if n.endpoints == nil {
|
||||
n.endpoints = make(endpoints)
|
||||
}
|
||||
|
||||
paramKeys := patParamKeys(pattern)
|
||||
|
||||
if method&mSTUB == mSTUB {
|
||||
n.endpoints.Value(mSTUB).handler = handler
|
||||
}
|
||||
if method&mALL == mALL {
|
||||
h := n.endpoints.Value(mALL)
|
||||
h.handler = handler
|
||||
h.pattern = pattern
|
||||
h.paramKeys = paramKeys
|
||||
for _, m := range methodMap {
|
||||
h := n.endpoints.Value(m)
|
||||
h.handler = handler
|
||||
h.pattern = pattern
|
||||
h.paramKeys = paramKeys
|
||||
}
|
||||
} else {
|
||||
h := n.endpoints.Value(method)
|
||||
h.handler = handler
|
||||
h.pattern = pattern
|
||||
h.paramKeys = paramKeys
|
||||
}
|
||||
}
|
||||
|
||||
func (n *node) FindRoute(rctx *Context, method methodTyp, path string) (*node, endpoints, http.Handler) {
|
||||
// Reset the context routing pattern and params
|
||||
rctx.routePattern = ""
|
||||
rctx.routeParams.Keys = rctx.routeParams.Keys[:0]
|
||||
rctx.routeParams.Values = rctx.routeParams.Values[:0]
|
||||
|
||||
// Find the routing handlers for the path
|
||||
rn := n.findRoute(rctx, method, path)
|
||||
if rn == nil {
|
||||
return nil, nil, nil
|
||||
}
|
||||
|
||||
// Record the routing params in the request lifecycle
|
||||
rctx.URLParams.Keys = append(rctx.URLParams.Keys, rctx.routeParams.Keys...)
|
||||
rctx.URLParams.Values = append(rctx.URLParams.Values, rctx.routeParams.Values...)
|
||||
|
||||
// Record the routing pattern in the request lifecycle
|
||||
if rn.endpoints[method].pattern != "" {
|
||||
rctx.routePattern = rn.endpoints[method].pattern
|
||||
rctx.RoutePatterns = append(rctx.RoutePatterns, rctx.routePattern)
|
||||
}
|
||||
|
||||
return rn, rn.endpoints, rn.endpoints[method].handler
|
||||
}
|
||||
|
||||
// Recursive edge traversal by checking all nodeTyp groups along the way.
|
||||
// It's like searching through a multi-dimensional radix trie.
|
||||
func (n *node) findRoute(rctx *Context, method methodTyp, path string) *node {
|
||||
nn := n
|
||||
search := path
|
||||
|
||||
for t, nds := range nn.children {
|
||||
ntyp := nodeTyp(t)
|
||||
if len(nds) == 0 {
|
||||
continue
|
||||
}
|
||||
|
||||
var xn *node
|
||||
xsearch := search
|
||||
|
||||
var label byte
|
||||
if search != "" {
|
||||
label = search[0]
|
||||
}
|
||||
|
||||
switch ntyp {
|
||||
case ntStatic:
|
||||
xn = nds.findEdge(label)
|
||||
if xn == nil || !strings.HasPrefix(xsearch, xn.prefix) {
|
||||
continue
|
||||
}
|
||||
xsearch = xsearch[len(xn.prefix):]
|
||||
|
||||
case ntParam, ntRegexp:
|
||||
// short-circuit and return no matching route for empty param values
|
||||
if xsearch == "" {
|
||||
continue
|
||||
}
|
||||
|
||||
// serially loop through each node grouped by the tail delimiter
|
||||
for idx := 0; idx < len(nds); idx++ {
|
||||
xn = nds[idx]
|
||||
|
||||
// label for param nodes is the delimiter byte
|
||||
p := strings.IndexByte(xsearch, xn.tail)
|
||||
|
||||
if p < 0 {
|
||||
if xn.tail == '/' {
|
||||
p = len(xsearch)
|
||||
} else {
|
||||
continue
|
||||
}
|
||||
} else if ntyp == ntRegexp && p == 0 {
|
||||
continue
|
||||
}
|
||||
|
||||
if ntyp == ntRegexp && xn.rex != nil {
|
||||
if !xn.rex.MatchString(xsearch[:p]) {
|
||||
continue
|
||||
}
|
||||
} else if strings.IndexByte(xsearch[:p], '/') != -1 {
|
||||
// avoid a match across path segments
|
||||
continue
|
||||
}
|
||||
|
||||
prevlen := len(rctx.routeParams.Values)
|
||||
rctx.routeParams.Values = append(rctx.routeParams.Values, xsearch[:p])
|
||||
xsearch = xsearch[p:]
|
||||
|
||||
if len(xsearch) == 0 {
|
||||
if xn.isLeaf() {
|
||||
h := xn.endpoints[method]
|
||||
if h != nil && h.handler != nil {
|
||||
rctx.routeParams.Keys = append(rctx.routeParams.Keys, h.paramKeys...)
|
||||
return xn
|
||||
}
|
||||
|
||||
// flag that the routing context found a route, but not a corresponding
|
||||
// supported method
|
||||
rctx.methodNotAllowed = true
|
||||
}
|
||||
}
|
||||
|
||||
// recursively find the next node on this branch
|
||||
fin := xn.findRoute(rctx, method, xsearch)
|
||||
if fin != nil {
|
||||
return fin
|
||||
}
|
||||
|
||||
// not found on this branch, reset vars
|
||||
rctx.routeParams.Values = rctx.routeParams.Values[:prevlen]
|
||||
xsearch = search
|
||||
}
|
||||
|
||||
rctx.routeParams.Values = append(rctx.routeParams.Values, "")
|
||||
|
||||
default:
|
||||
// catch-all nodes
|
||||
rctx.routeParams.Values = append(rctx.routeParams.Values, search)
|
||||
xn = nds[0]
|
||||
xsearch = ""
|
||||
}
|
||||
|
||||
if xn == nil {
|
||||
continue
|
||||
}
|
||||
|
||||
// did we find it yet?
|
||||
if len(xsearch) == 0 {
|
||||
if xn.isLeaf() {
|
||||
h := xn.endpoints[method]
|
||||
if h != nil && h.handler != nil {
|
||||
rctx.routeParams.Keys = append(rctx.routeParams.Keys, h.paramKeys...)
|
||||
return xn
|
||||
}
|
||||
|
||||
// flag that the routing context found a route, but not a corresponding
|
||||
// supported method
|
||||
rctx.methodNotAllowed = true
|
||||
}
|
||||
}
|
||||
|
||||
// recursively find the next node..
|
||||
fin := xn.findRoute(rctx, method, xsearch)
|
||||
if fin != nil {
|
||||
return fin
|
||||
}
|
||||
|
||||
// Did not find final handler, let's remove the param here if it was set
|
||||
if xn.typ > ntStatic {
|
||||
if len(rctx.routeParams.Values) > 0 {
|
||||
rctx.routeParams.Values = rctx.routeParams.Values[:len(rctx.routeParams.Values)-1]
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (n *node) findEdge(ntyp nodeTyp, label byte) *node {
|
||||
nds := n.children[ntyp]
|
||||
num := len(nds)
|
||||
idx := 0
|
||||
|
||||
switch ntyp {
|
||||
case ntStatic, ntParam, ntRegexp:
|
||||
i, j := 0, num-1
|
||||
for i <= j {
|
||||
idx = i + (j-i)/2
|
||||
if label > nds[idx].label {
|
||||
i = idx + 1
|
||||
} else if label < nds[idx].label {
|
||||
j = idx - 1
|
||||
} else {
|
||||
i = num // breaks cond
|
||||
}
|
||||
}
|
||||
if nds[idx].label != label {
|
||||
return nil
|
||||
}
|
||||
return nds[idx]
|
||||
|
||||
default: // catch all
|
||||
return nds[idx]
|
||||
}
|
||||
}
|
||||
|
||||
func (n *node) isLeaf() bool {
|
||||
return n.endpoints != nil
|
||||
}
|
||||
|
||||
func (n *node) findPattern(pattern string) bool {
|
||||
nn := n
|
||||
for _, nds := range nn.children {
|
||||
if len(nds) == 0 {
|
||||
continue
|
||||
}
|
||||
|
||||
n = nn.findEdge(nds[0].typ, pattern[0])
|
||||
if n == nil {
|
||||
continue
|
||||
}
|
||||
|
||||
var idx int
|
||||
var xpattern string
|
||||
|
||||
switch n.typ {
|
||||
case ntStatic:
|
||||
idx = longestPrefix(pattern, n.prefix)
|
||||
if idx < len(n.prefix) {
|
||||
continue
|
||||
}
|
||||
|
||||
case ntParam, ntRegexp:
|
||||
idx = strings.IndexByte(pattern, '}') + 1
|
||||
|
||||
case ntCatchAll:
|
||||
idx = longestPrefix(pattern, "*")
|
||||
|
||||
default:
|
||||
panic("chi: unknown node type")
|
||||
}
|
||||
|
||||
xpattern = pattern[idx:]
|
||||
if len(xpattern) == 0 {
|
||||
return true
|
||||
}
|
||||
|
||||
return n.findPattern(xpattern)
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (n *node) routes() []Route {
|
||||
rts := []Route{}
|
||||
|
||||
n.walk(func(eps endpoints, subroutes Routes) bool {
|
||||
if eps[mSTUB] != nil && eps[mSTUB].handler != nil && subroutes == nil {
|
||||
return false
|
||||
}
|
||||
|
||||
// Group methodHandlers by unique patterns
|
||||
pats := make(map[string]endpoints)
|
||||
|
||||
for mt, h := range eps {
|
||||
if h.pattern == "" {
|
||||
continue
|
||||
}
|
||||
p, ok := pats[h.pattern]
|
||||
if !ok {
|
||||
p = endpoints{}
|
||||
pats[h.pattern] = p
|
||||
}
|
||||
p[mt] = h
|
||||
}
|
||||
|
||||
for p, mh := range pats {
|
||||
hs := make(map[string]http.Handler)
|
||||
if mh[mALL] != nil && mh[mALL].handler != nil {
|
||||
hs["*"] = mh[mALL].handler
|
||||
}
|
||||
|
||||
for mt, h := range mh {
|
||||
if h.handler == nil {
|
||||
continue
|
||||
}
|
||||
m := methodTypString(mt)
|
||||
if m == "" {
|
||||
continue
|
||||
}
|
||||
hs[m] = h.handler
|
||||
}
|
||||
|
||||
rt := Route{subroutes, hs, p}
|
||||
rts = append(rts, rt)
|
||||
}
|
||||
|
||||
return false
|
||||
})
|
||||
|
||||
return rts
|
||||
}
|
||||
|
||||
func (n *node) walk(fn func(eps endpoints, subroutes Routes) bool) bool {
|
||||
// Visit the leaf values if any
|
||||
if (n.endpoints != nil || n.subroutes != nil) && fn(n.endpoints, n.subroutes) {
|
||||
return true
|
||||
}
|
||||
|
||||
// Recurse on the children
|
||||
for _, ns := range n.children {
|
||||
for _, cn := range ns {
|
||||
if cn.walk(fn) {
|
||||
return true
|
||||
}
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
// patNextSegment returns the next segment details from a pattern:
|
||||
// node type, param key, regexp string, param tail byte, param starting index, param ending index
|
||||
func patNextSegment(pattern string) (nodeTyp, string, string, byte, int, int) {
|
||||
ps := strings.Index(pattern, "{")
|
||||
ws := strings.Index(pattern, "*")
|
||||
|
||||
if ps < 0 && ws < 0 {
|
||||
return ntStatic, "", "", 0, 0, len(pattern) // we return the entire thing
|
||||
}
|
||||
|
||||
// Sanity check
|
||||
if ps >= 0 && ws >= 0 && ws < ps {
|
||||
panic("chi: wildcard '*' must be the last pattern in a route, otherwise use a '{param}'")
|
||||
}
|
||||
|
||||
var tail byte = '/' // Default endpoint tail to / byte
|
||||
|
||||
if ps >= 0 {
|
||||
// Param/Regexp pattern is next
|
||||
nt := ntParam
|
||||
|
||||
// Read to closing } taking into account opens and closes in curl count (cc)
|
||||
cc := 0
|
||||
pe := ps
|
||||
for i, c := range pattern[ps:] {
|
||||
if c == '{' {
|
||||
cc++
|
||||
} else if c == '}' {
|
||||
cc--
|
||||
if cc == 0 {
|
||||
pe = ps + i
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
if pe == ps {
|
||||
panic("chi: route param closing delimiter '}' is missing")
|
||||
}
|
||||
|
||||
key := pattern[ps+1 : pe]
|
||||
pe++ // set end to next position
|
||||
|
||||
if pe < len(pattern) {
|
||||
tail = pattern[pe]
|
||||
}
|
||||
|
||||
var rexpat string
|
||||
if idx := strings.Index(key, ":"); idx >= 0 {
|
||||
nt = ntRegexp
|
||||
rexpat = key[idx+1:]
|
||||
key = key[:idx]
|
||||
}
|
||||
|
||||
if len(rexpat) > 0 {
|
||||
if rexpat[0] != '^' {
|
||||
rexpat = "^" + rexpat
|
||||
}
|
||||
if rexpat[len(rexpat)-1] != '$' {
|
||||
rexpat += "$"
|
||||
}
|
||||
}
|
||||
|
||||
return nt, key, rexpat, tail, ps, pe
|
||||
}
|
||||
|
||||
// Wildcard pattern as finale
|
||||
if ws < len(pattern)-1 {
|
||||
panic("chi: wildcard '*' must be the last value in a route. trim trailing text or use a '{param}' instead")
|
||||
}
|
||||
return ntCatchAll, "*", "", 0, ws, len(pattern)
|
||||
}
|
||||
|
||||
func patParamKeys(pattern string) []string {
|
||||
pat := pattern
|
||||
paramKeys := []string{}
|
||||
for {
|
||||
ptyp, paramKey, _, _, _, e := patNextSegment(pat)
|
||||
if ptyp == ntStatic {
|
||||
return paramKeys
|
||||
}
|
||||
for i := 0; i < len(paramKeys); i++ {
|
||||
if paramKeys[i] == paramKey {
|
||||
panic(fmt.Sprintf("chi: routing pattern '%s' contains duplicate param key, '%s'", pattern, paramKey))
|
||||
}
|
||||
}
|
||||
paramKeys = append(paramKeys, paramKey)
|
||||
pat = pat[e:]
|
||||
}
|
||||
}
|
||||
|
||||
// longestPrefix finds the length of the shared prefix
|
||||
// of two strings
|
||||
func longestPrefix(k1, k2 string) int {
|
||||
max := len(k1)
|
||||
if l := len(k2); l < max {
|
||||
max = l
|
||||
}
|
||||
var i int
|
||||
for i = 0; i < max; i++ {
|
||||
if k1[i] != k2[i] {
|
||||
break
|
||||
}
|
||||
}
|
||||
return i
|
||||
}
|
||||
|
||||
func methodTypString(method methodTyp) string {
|
||||
for s, t := range methodMap {
|
||||
if method == t {
|
||||
return s
|
||||
}
|
||||
}
|
||||
return ""
|
||||
}
|
||||
|
||||
type nodes []*node
|
||||
|
||||
// Sort the list of nodes by label
|
||||
func (ns nodes) Sort() { sort.Sort(ns); ns.tailSort() }
|
||||
func (ns nodes) Len() int { return len(ns) }
|
||||
func (ns nodes) Swap(i, j int) { ns[i], ns[j] = ns[j], ns[i] }
|
||||
func (ns nodes) Less(i, j int) bool { return ns[i].label < ns[j].label }
|
||||
|
||||
// tailSort pushes nodes with '/' as the tail to the end of the list for param nodes.
|
||||
// The list order determines the traversal order.
|
||||
func (ns nodes) tailSort() {
|
||||
for i := len(ns) - 1; i >= 0; i-- {
|
||||
if ns[i].typ > ntStatic && ns[i].tail == '/' {
|
||||
ns.Swap(i, len(ns)-1)
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (ns nodes) findEdge(label byte) *node {
|
||||
num := len(ns)
|
||||
idx := 0
|
||||
i, j := 0, num-1
|
||||
for i <= j {
|
||||
idx = i + (j-i)/2
|
||||
if label > ns[idx].label {
|
||||
i = idx + 1
|
||||
} else if label < ns[idx].label {
|
||||
j = idx - 1
|
||||
} else {
|
||||
i = num // breaks cond
|
||||
}
|
||||
}
|
||||
if ns[idx].label != label {
|
||||
return nil
|
||||
}
|
||||
return ns[idx]
|
||||
}
|
||||
|
||||
// Route describes the details of a routing handler.
|
||||
// Handlers map key is an HTTP method
|
||||
type Route struct {
|
||||
SubRoutes Routes
|
||||
Handlers map[string]http.Handler
|
||||
Pattern string
|
||||
}
|
||||
|
||||
// WalkFunc is the type of the function called for each method and route visited by Walk.
|
||||
type WalkFunc func(method string, route string, handler http.Handler, middlewares ...func(http.Handler) http.Handler) error
|
||||
|
||||
// Walk walks any router tree that implements Routes interface.
|
||||
func Walk(r Routes, walkFn WalkFunc) error {
|
||||
return walk(r, walkFn, "")
|
||||
}
|
||||
|
||||
func walk(r Routes, walkFn WalkFunc, parentRoute string, parentMw ...func(http.Handler) http.Handler) error {
|
||||
for _, route := range r.Routes() {
|
||||
mws := make([]func(http.Handler) http.Handler, len(parentMw))
|
||||
copy(mws, parentMw)
|
||||
mws = append(mws, r.Middlewares()...)
|
||||
|
||||
if route.SubRoutes != nil {
|
||||
if err := walk(route.SubRoutes, walkFn, parentRoute+route.Pattern, mws...); err != nil {
|
||||
return err
|
||||
}
|
||||
continue
|
||||
}
|
||||
|
||||
for method, handler := range route.Handlers {
|
||||
if method == "*" {
|
||||
// Ignore a "catchAll" method, since we pass down all the specific methods for each route.
|
||||
continue
|
||||
}
|
||||
|
||||
fullRoute := parentRoute + route.Pattern
|
||||
fullRoute = strings.Replace(fullRoute, "/*/", "/", -1)
|
||||
|
||||
if chain, ok := handler.(*ChainHandler); ok {
|
||||
if err := walkFn(method, fullRoute, chain.Endpoint, append(mws, chain.Middlewares...)...); err != nil {
|
||||
return err
|
||||
}
|
||||
} else {
|
||||
if err := walkFn(method, fullRoute, handler, mws...); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
|
@ -0,0 +1,56 @@
|
|||
issues:
|
||||
exclude:
|
||||
- G203
|
||||
|
||||
linters:
|
||||
disable-all: true
|
||||
enable:
|
||||
- bodyclose
|
||||
- deadcode
|
||||
- depguard
|
||||
- dogsled
|
||||
- dupl
|
||||
- errcheck
|
||||
- exhaustive
|
||||
- goconst
|
||||
- gocritic
|
||||
- gocyclo
|
||||
- goimports
|
||||
- goprintffuncname
|
||||
- gosec
|
||||
- gosimple
|
||||
- govet
|
||||
- ineffassign
|
||||
- nakedret
|
||||
- nolintlint
|
||||
- rowserrcheck
|
||||
- staticcheck
|
||||
- structcheck
|
||||
- stylecheck
|
||||
- typecheck
|
||||
- unconvert
|
||||
- unparam
|
||||
- unused
|
||||
- varcheck
|
||||
- whitespace
|
||||
- noctx
|
||||
- misspell
|
||||
# - golint
|
||||
# - gochecknoinits
|
||||
# - funlen
|
||||
# - gofmt
|
||||
# - scopelint
|
||||
# - interfacer
|
||||
# - gomnd
|
||||
# - lll
|
||||
# - asciicheck
|
||||
# - gochecknoglobals
|
||||
# - gocognit
|
||||
# - godot
|
||||
# - godox
|
||||
# - goerr113
|
||||
# - maligned
|
||||
# - nestif
|
||||
# - prealloc
|
||||
# - testpackage
|
||||
# - wsl
|
||||
|
|
@ -0,0 +1,20 @@
|
|||
The MIT License (MIT)
|
||||
|
||||
Copyright (c) 2014 Cory Jacobsen
|
||||
|
||||
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.
|
||||
|
|
@ -0,0 +1,14 @@
|
|||
.PHONY: help test
|
||||
.DEFAULT_GOAL := help
|
||||
|
||||
help: ## Displays this help message.
|
||||
@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z_-]+:.*?## / {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)
|
||||
|
||||
test: ## Runs the linter, tests, and vetting.
|
||||
golangci-lint run ./...
|
||||
go test -cover -race -count=1 ./...
|
||||
go vet ./...
|
||||
|
||||
ci: ## Runs on the tests and vetting for CI.
|
||||
go test -cover -race -count=1 ./...
|
||||
go vet ./...
|
||||
|
|
@ -0,0 +1,530 @@
|
|||
# Render [](http://godoc.org/github.com/unrolled/render) [](https://github.com/unrolled/render/actions)
|
||||
|
||||
|
||||
Render is a package that provides functionality for easily rendering JSON, XML, text, binary data, and HTML templates.
|
||||
|
||||
## Usage
|
||||
Render can be used with pretty much any web framework providing you can access the `http.ResponseWriter` from your handler. The rendering functions simply wraps Go's existing functionality for marshaling and rendering data.
|
||||
|
||||
- HTML: Uses the [html/template](http://golang.org/pkg/html/template/) package to render HTML templates.
|
||||
- JSON: Uses the [encoding/json](http://golang.org/pkg/encoding/json/) package to marshal data into a JSON-encoded response.
|
||||
- XML: Uses the [encoding/xml](http://golang.org/pkg/encoding/xml/) package to marshal data into an XML-encoded response.
|
||||
- Binary data: Passes the incoming data straight through to the `http.ResponseWriter`.
|
||||
- Text: Passes the incoming string straight through to the `http.ResponseWriter`.
|
||||
|
||||
~~~ go
|
||||
// main.go
|
||||
package main
|
||||
|
||||
import (
|
||||
"encoding/xml"
|
||||
"net/http"
|
||||
|
||||
"github.com/unrolled/render"
|
||||
)
|
||||
|
||||
type ExampleXml struct {
|
||||
XMLName xml.Name `xml:"example"`
|
||||
One string `xml:"one,attr"`
|
||||
Two string `xml:"two,attr"`
|
||||
}
|
||||
|
||||
func main() {
|
||||
r := render.New()
|
||||
mux := http.NewServeMux()
|
||||
|
||||
mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
|
||||
w.Write([]byte("Welcome, visit sub pages now."))
|
||||
})
|
||||
|
||||
mux.HandleFunc("/data", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.Data(w, http.StatusOK, []byte("Some binary data here."))
|
||||
})
|
||||
|
||||
mux.HandleFunc("/text", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.Text(w, http.StatusOK, "Plain text here")
|
||||
})
|
||||
|
||||
mux.HandleFunc("/json", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.JSON(w, http.StatusOK, map[string]string{"hello": "json"})
|
||||
})
|
||||
|
||||
mux.HandleFunc("/jsonp", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.JSONP(w, http.StatusOK, "callbackName", map[string]string{"hello": "jsonp"})
|
||||
})
|
||||
|
||||
mux.HandleFunc("/xml", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.XML(w, http.StatusOK, ExampleXml{One: "hello", Two: "xml"})
|
||||
})
|
||||
|
||||
mux.HandleFunc("/html", func(w http.ResponseWriter, req *http.Request) {
|
||||
// Assumes you have a template in ./templates called "example.tmpl"
|
||||
// $ mkdir -p templates && echo "<h1>Hello {{.}}.</h1>" > templates/example.tmpl
|
||||
r.HTML(w, http.StatusOK, "example", "World")
|
||||
})
|
||||
|
||||
http.ListenAndServe("127.0.0.1:3000", mux)
|
||||
}
|
||||
~~~
|
||||
|
||||
~~~ html
|
||||
<!-- templates/example.tmpl -->
|
||||
<h1>Hello {{.}}.</h1>
|
||||
~~~
|
||||
|
||||
### Available Options
|
||||
Render comes with a variety of configuration options _(Note: these are not the default option values. See the defaults below.)_:
|
||||
|
||||
~~~ go
|
||||
// ...
|
||||
r := render.New(render.Options{
|
||||
Directory: "templates", // Specify what path to load the templates from.
|
||||
FileSystem: &LocalFileSystem{}, // Specify filesystem from where files are loaded.
|
||||
Asset: func(name string) ([]byte, error) { // Load from an Asset function instead of file.
|
||||
return []byte("template content"), nil
|
||||
},
|
||||
AssetNames: func() []string { // Return a list of asset names for the Asset function
|
||||
return []string{"filename.tmpl"}
|
||||
},
|
||||
Layout: "layout", // Specify a layout template. Layouts can call {{ yield }} to render the current template or {{ partial "css" }} to render a partial from the current template.
|
||||
Extensions: []string{".tmpl", ".html"}, // Specify extensions to load for templates.
|
||||
Funcs: []template.FuncMap{AppHelpers}, // Specify helper function maps for templates to access.
|
||||
Delims: render.Delims{"{[{", "}]}"}, // Sets delimiters to the specified strings.
|
||||
Charset: "UTF-8", // Sets encoding for content-types. Default is "UTF-8".
|
||||
DisableCharset: true, // Prevents the charset from being appended to the content type header.
|
||||
IndentJSON: true, // Output human readable JSON.
|
||||
IndentXML: true, // Output human readable XML.
|
||||
PrefixJSON: []byte(")]}',\n"), // Prefixes JSON responses with the given bytes.
|
||||
PrefixXML: []byte("<?xml version='1.0' encoding='UTF-8'?>"), // Prefixes XML responses with the given bytes.
|
||||
HTMLContentType: "application/xhtml+xml", // Output XHTML content type instead of default "text/html".
|
||||
IsDevelopment: true, // Render will now recompile the templates on every HTML response.
|
||||
UseMutexLock: true, // Overrides the default no lock implementation and uses the standard `sync.RWMutex` lock.
|
||||
UnEscapeHTML: true, // Replace ensure '&<>' are output correctly (JSON only).
|
||||
StreamingJSON: true, // Streams the JSON response via json.Encoder.
|
||||
RequirePartials: true, // Return an error if a template is missing a partial used in a layout.
|
||||
DisableHTTPErrorRendering: true, // Disables automatic rendering of http.StatusInternalServerError when an error occurs.
|
||||
})
|
||||
// ...
|
||||
~~~
|
||||
|
||||
### Default Options
|
||||
These are the preset options for Render:
|
||||
|
||||
~~~ go
|
||||
r := render.New()
|
||||
|
||||
// Is the same as the default configuration options:
|
||||
|
||||
r := render.New(render.Options{
|
||||
Directory: "templates",
|
||||
FileSystem: &LocalFileSystem{},
|
||||
Asset: nil,
|
||||
AssetNames: nil,
|
||||
Layout: "",
|
||||
Extensions: []string{".tmpl"},
|
||||
Funcs: []template.FuncMap{},
|
||||
Delims: render.Delims{"{{", "}}"},
|
||||
Charset: "UTF-8",
|
||||
DisableCharset: false,
|
||||
IndentJSON: false,
|
||||
IndentXML: false,
|
||||
PrefixJSON: []byte(""),
|
||||
PrefixXML: []byte(""),
|
||||
BinaryContentType: "application/octet-stream",
|
||||
HTMLContentType: "text/html",
|
||||
JSONContentType: "application/json",
|
||||
JSONPContentType: "application/javascript",
|
||||
TextContentType: "text/plain",
|
||||
XMLContentType: "application/xhtml+xml",
|
||||
IsDevelopment: false,
|
||||
UseMutexLock: false,
|
||||
UnEscapeHTML: false,
|
||||
StreamingJSON: false,
|
||||
RequirePartials: false,
|
||||
DisableHTTPErrorRendering: false,
|
||||
RenderPartialsWithoutPrefix: false,
|
||||
BufferPool: GenericBufferPool,
|
||||
})
|
||||
~~~
|
||||
|
||||
### JSON vs Streaming JSON
|
||||
By default, Render does **not** stream JSON to the `http.ResponseWriter`. It instead marshalls your object into a byte array, and if no errors occurred, writes that byte array to the `http.ResponseWriter`. If you would like to use the built it in streaming functionality (`json.Encoder`), you can set the `StreamingJSON` setting to `true`. This will stream the output directly to the `http.ResponseWriter`. Also note that streaming is only implemented in `render.JSON` and not `render.JSONP`, and the `UnEscapeHTML` and `Indent` options are ignored when streaming.
|
||||
|
||||
### Loading Templates
|
||||
By default Render will attempt to load templates with a '.tmpl' extension from the "templates" directory. Templates are found by traversing the templates directory and are named by path and basename. For instance, the following directory structure:
|
||||
|
||||
~~~
|
||||
templates/
|
||||
|
|
||||
|__ admin/
|
||||
| |
|
||||
| |__ index.tmpl
|
||||
| |
|
||||
| |__ edit.tmpl
|
||||
|
|
||||
|__ home.tmpl
|
||||
~~~
|
||||
|
||||
Will provide the following templates:
|
||||
~~~
|
||||
admin/index
|
||||
admin/edit
|
||||
home
|
||||
~~~
|
||||
|
||||
Templates can be loaded from an `embed.FS`.
|
||||
|
||||
~~~ go
|
||||
// ...
|
||||
|
||||
//go:embed templates/*.html templates/*.tmpl
|
||||
var embeddedTemplates embed.FS
|
||||
|
||||
// ...
|
||||
|
||||
r := render.New(render.Options{
|
||||
Directory: "templates",
|
||||
FileSystem: &render.EmbedFileSystem{
|
||||
FS: embeddedTemplates,
|
||||
},
|
||||
Extensions: []string{".html", ".tmpl"},
|
||||
})
|
||||
// ...
|
||||
~~~
|
||||
|
||||
You can also load templates from memory by providing the `Asset` and `AssetNames` options,
|
||||
e.g. when generating an asset file using [go-bindata](https://github.com/jteeuwen/go-bindata).
|
||||
|
||||
### Layouts
|
||||
Render provides `yield` and `partial` functions for layouts to access:
|
||||
~~~ go
|
||||
// ...
|
||||
r := render.New(render.Options{
|
||||
Layout: "layout",
|
||||
})
|
||||
// ...
|
||||
~~~
|
||||
|
||||
~~~ html
|
||||
<!-- templates/layout.tmpl -->
|
||||
<html>
|
||||
<head>
|
||||
<title>My Layout</title>
|
||||
<!-- Render the partial template called `css-$current_template` here -->
|
||||
{{ partial "css" }}
|
||||
</head>
|
||||
<body>
|
||||
<!-- render the partial template called `header-$current_template` here -->
|
||||
{{ partial "header" }}
|
||||
<!-- Render the current template here -->
|
||||
{{ yield }}
|
||||
<!-- render the partial template called `footer-$current_template` here -->
|
||||
{{ partial "footer" }}
|
||||
</body>
|
||||
</html>
|
||||
~~~
|
||||
|
||||
`current` can also be called to get the current template being rendered.
|
||||
~~~ html
|
||||
<!-- templates/layout.tmpl -->
|
||||
<html>
|
||||
<head>
|
||||
<title>My Layout</title>
|
||||
</head>
|
||||
<body>
|
||||
This is the {{ current }} page.
|
||||
</body>
|
||||
</html>
|
||||
~~~
|
||||
|
||||
Partials are defined by individual templates as seen below. The partial template's
|
||||
name needs to be defined as "{partial name}-{template name}".
|
||||
~~~ html
|
||||
<!-- templates/home.tmpl -->
|
||||
{{ define "header-home" }}
|
||||
<h1>Home</h1>
|
||||
{{ end }}
|
||||
|
||||
{{ define "footer-home"}}
|
||||
<p>The End</p>
|
||||
{{ end }}
|
||||
~~~
|
||||
|
||||
By default, the template is not required to define all partials referenced in the
|
||||
layout. If you want an error to be returned when a template does not define a
|
||||
partial, set `Options.RequirePartials = true`.
|
||||
|
||||
### Character Encodings
|
||||
Render will automatically set the proper Content-Type header based on which function you call. See below for an example of what the default settings would output (note that UTF-8 is the default, and binary data does not output the charset):
|
||||
~~~ go
|
||||
// main.go
|
||||
package main
|
||||
|
||||
import (
|
||||
"encoding/xml"
|
||||
"net/http"
|
||||
|
||||
"github.com/unrolled/render"
|
||||
)
|
||||
|
||||
type ExampleXml struct {
|
||||
XMLName xml.Name `xml:"example"`
|
||||
One string `xml:"one,attr"`
|
||||
Two string `xml:"two,attr"`
|
||||
}
|
||||
|
||||
func main() {
|
||||
r := render.New(render.Options{})
|
||||
mux := http.NewServeMux()
|
||||
|
||||
// This will set the Content-Type header to "application/octet-stream".
|
||||
// Note that this does not receive a charset value.
|
||||
mux.HandleFunc("/data", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.Data(w, http.StatusOK, []byte("Some binary data here."))
|
||||
})
|
||||
|
||||
// This will set the Content-Type header to "application/json; charset=UTF-8".
|
||||
mux.HandleFunc("/json", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.JSON(w, http.StatusOK, map[string]string{"hello": "json"})
|
||||
})
|
||||
|
||||
// This will set the Content-Type header to "text/xml; charset=UTF-8".
|
||||
mux.HandleFunc("/xml", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.XML(w, http.StatusOK, ExampleXml{One: "hello", Two: "xml"})
|
||||
})
|
||||
|
||||
// This will set the Content-Type header to "text/plain; charset=UTF-8".
|
||||
mux.HandleFunc("/text", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.Text(w, http.StatusOK, "Plain text here")
|
||||
})
|
||||
|
||||
// This will set the Content-Type header to "text/html; charset=UTF-8".
|
||||
mux.HandleFunc("/html", func(w http.ResponseWriter, req *http.Request) {
|
||||
// Assumes you have a template in ./templates called "example.tmpl"
|
||||
// $ mkdir -p templates && echo "<h1>Hello {{.}}.</h1>" > templates/example.tmpl
|
||||
r.HTML(w, http.StatusOK, "example", "World")
|
||||
})
|
||||
|
||||
http.ListenAndServe("127.0.0.1:3000", mux)
|
||||
}
|
||||
~~~
|
||||
|
||||
In order to change the charset, you can set the `Charset` within the `render.Options` to your encoding value:
|
||||
~~~ go
|
||||
// main.go
|
||||
package main
|
||||
|
||||
import (
|
||||
"encoding/xml"
|
||||
"net/http"
|
||||
|
||||
"github.com/unrolled/render"
|
||||
)
|
||||
|
||||
type ExampleXml struct {
|
||||
XMLName xml.Name `xml:"example"`
|
||||
One string `xml:"one,attr"`
|
||||
Two string `xml:"two,attr"`
|
||||
}
|
||||
|
||||
func main() {
|
||||
r := render.New(render.Options{
|
||||
Charset: "ISO-8859-1",
|
||||
})
|
||||
mux := http.NewServeMux()
|
||||
|
||||
// This will set the Content-Type header to "application/octet-stream".
|
||||
// Note that this does not receive a charset value.
|
||||
mux.HandleFunc("/data", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.Data(w, http.StatusOK, []byte("Some binary data here."))
|
||||
})
|
||||
|
||||
// This will set the Content-Type header to "application/json; charset=ISO-8859-1".
|
||||
mux.HandleFunc("/json", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.JSON(w, http.StatusOK, map[string]string{"hello": "json"})
|
||||
})
|
||||
|
||||
// This will set the Content-Type header to "text/xml; charset=ISO-8859-1".
|
||||
mux.HandleFunc("/xml", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.XML(w, http.StatusOK, ExampleXml{One: "hello", Two: "xml"})
|
||||
})
|
||||
|
||||
// This will set the Content-Type header to "text/plain; charset=ISO-8859-1".
|
||||
mux.HandleFunc("/text", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.Text(w, http.StatusOK, "Plain text here")
|
||||
})
|
||||
|
||||
// This will set the Content-Type header to "text/html; charset=ISO-8859-1".
|
||||
mux.HandleFunc("/html", func(w http.ResponseWriter, req *http.Request) {
|
||||
// Assumes you have a template in ./templates called "example.tmpl"
|
||||
// $ mkdir -p templates && echo "<h1>Hello {{.}}.</h1>" > templates/example.tmpl
|
||||
r.HTML(w, http.StatusOK, "example", "World")
|
||||
})
|
||||
|
||||
http.ListenAndServe("127.0.0.1:3000", mux)
|
||||
}
|
||||
~~~
|
||||
|
||||
### Error Handling
|
||||
|
||||
The rendering functions return any errors from the rendering engine.
|
||||
By default, they will also write the error to the HTTP response and set the status code to 500. You can disable
|
||||
this behavior so that you can handle errors yourself by setting
|
||||
`Options.DisableHTTPErrorRendering: true`.
|
||||
|
||||
~~~go
|
||||
r := render.New(render.Options{
|
||||
DisableHTTPErrorRendering: true,
|
||||
})
|
||||
|
||||
//...
|
||||
|
||||
err := r.HTML(w, http.StatusOK, "example", "World")
|
||||
if err != nil{
|
||||
http.Redirect(w, r, "/my-custom-500", http.StatusFound)
|
||||
}
|
||||
~~~
|
||||
|
||||
## Integration Examples
|
||||
|
||||
### [Echo](https://github.com/labstack/echo)
|
||||
~~~ go
|
||||
// main.go
|
||||
package main
|
||||
|
||||
import (
|
||||
"io"
|
||||
"net/http"
|
||||
|
||||
"github.com/labstack/echo"
|
||||
"github.com/unrolled/render"
|
||||
)
|
||||
|
||||
type RenderWrapper struct { // We need to wrap the renderer because we need a different signature for echo.
|
||||
rnd *render.Render
|
||||
}
|
||||
|
||||
func (r *RenderWrapper) Render(w io.Writer, name string, data interface{},c echo.Context) error {
|
||||
return r.rnd.HTML(w, 0, name, data) // The zero status code is overwritten by echo.
|
||||
}
|
||||
|
||||
func main() {
|
||||
r := &RenderWrapper{render.New()}
|
||||
|
||||
e := echo.New()
|
||||
|
||||
e.Renderer = r
|
||||
|
||||
e.GET("/", func(c echo.Context) error {
|
||||
return c.Render(http.StatusOK, "TemplateName", "TemplateData")
|
||||
})
|
||||
|
||||
e.Logger.Fatal(e.Start("127.0.0.1:8080"))
|
||||
}
|
||||
~~~
|
||||
|
||||
### [Gin](https://github.com/gin-gonic/gin)
|
||||
~~~ go
|
||||
// main.go
|
||||
package main
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
|
||||
"github.com/gin-gonic/gin"
|
||||
"github.com/unrolled/render"
|
||||
)
|
||||
|
||||
func main() {
|
||||
r := render.New(render.Options{
|
||||
IndentJSON: true,
|
||||
})
|
||||
|
||||
router := gin.Default()
|
||||
|
||||
router.GET("/", func(c *gin.Context) {
|
||||
r.JSON(c.Writer, http.StatusOK, map[string]string{"welcome": "This is rendered JSON!"})
|
||||
})
|
||||
|
||||
router.Run("127.0.0.1:8080")
|
||||
}
|
||||
~~~
|
||||
|
||||
### [Goji](https://github.com/zenazn/goji)
|
||||
~~~ go
|
||||
// main.go
|
||||
package main
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
|
||||
"github.com/zenazn/goji"
|
||||
"github.com/zenazn/goji/web"
|
||||
"github.com/unrolled/render"
|
||||
)
|
||||
|
||||
func main() {
|
||||
r := render.New(render.Options{
|
||||
IndentJSON: true,
|
||||
})
|
||||
|
||||
goji.Get("/", func(c web.C, w http.ResponseWriter, req *http.Request) {
|
||||
r.JSON(w, http.StatusOK, map[string]string{"welcome": "This is rendered JSON!"})
|
||||
})
|
||||
goji.Serve() // Defaults to ":8000".
|
||||
}
|
||||
~~~
|
||||
|
||||
### [Negroni](https://github.com/codegangsta/negroni)
|
||||
~~~ go
|
||||
// main.go
|
||||
package main
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
|
||||
"github.com/urfave/negroni"
|
||||
"github.com/unrolled/render"
|
||||
)
|
||||
|
||||
func main() {
|
||||
r := render.New(render.Options{
|
||||
IndentJSON: true,
|
||||
})
|
||||
mux := http.NewServeMux()
|
||||
|
||||
mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.JSON(w, http.StatusOK, map[string]string{"welcome": "This is rendered JSON!"})
|
||||
})
|
||||
|
||||
n := negroni.Classic()
|
||||
n.UseHandler(mux)
|
||||
n.Run("127.0.0.1:8080")
|
||||
}
|
||||
~~~
|
||||
|
||||
### [Traffic](https://github.com/pilu/traffic)
|
||||
~~~ go
|
||||
// main.go
|
||||
package main
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
|
||||
"github.com/pilu/traffic"
|
||||
"github.com/unrolled/render"
|
||||
)
|
||||
|
||||
func main() {
|
||||
r := render.New(render.Options{
|
||||
IndentJSON: true,
|
||||
})
|
||||
|
||||
router := traffic.New()
|
||||
router.Get("/", func(w traffic.ResponseWriter, req *traffic.Request) {
|
||||
r.JSON(w, http.StatusOK, map[string]string{"welcome": "This is rendered JSON!"})
|
||||
})
|
||||
|
||||
router.Run() // Defaults to "127.0.0.1:3000".
|
||||
}
|
||||
~~~
|
||||
|
|
@ -0,0 +1,55 @@
|
|||
/*Package render is a package that provides functionality for easily rendering JSON, XML, binary data, and HTML templates.
|
||||
|
||||
package main
|
||||
|
||||
import (
|
||||
"encoding/xml"
|
||||
"net/http"
|
||||
|
||||
"github.com/unrolled/render"
|
||||
)
|
||||
|
||||
type ExampleXml struct {
|
||||
XMLName xml.Name `xml:"example"`
|
||||
One string `xml:"one,attr"`
|
||||
Two string `xml:"two,attr"`
|
||||
}
|
||||
|
||||
func main() {
|
||||
r := render.New()
|
||||
mux := http.NewServeMux()
|
||||
|
||||
mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
|
||||
w.Write([]byte("Welcome, visit sub pages now."))
|
||||
})
|
||||
|
||||
mux.HandleFunc("/data", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.Data(w, http.StatusOK, []byte("Some binary data here."))
|
||||
})
|
||||
|
||||
mux.HandleFunc("/text", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.Text(w, http.StatusOK, "Plain text here")
|
||||
})
|
||||
|
||||
mux.HandleFunc("/json", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.JSON(w, http.StatusOK, map[string]string{"hello": "json"})
|
||||
})
|
||||
|
||||
mux.HandleFunc("/jsonp", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.JSONP(w, http.StatusOK, "callbackName", map[string]string{"hello": "jsonp"})
|
||||
})
|
||||
|
||||
mux.HandleFunc("/xml", func(w http.ResponseWriter, req *http.Request) {
|
||||
r.XML(w, http.StatusOK, ExampleXml{One: "hello", Two: "xml"})
|
||||
})
|
||||
|
||||
mux.HandleFunc("/html", func(w http.ResponseWriter, req *http.Request) {
|
||||
// Assumes you have a template in ./templates called "example.tmpl".
|
||||
// $ mkdir -p templates && echo "<h1>Hello HTML world.</h1>" > templates/example.tmpl
|
||||
r.HTML(w, http.StatusOK, "example", nil)
|
||||
})
|
||||
|
||||
http.ListenAndServe("127.0.0.1:3000", mux)
|
||||
}
|
||||
*/
|
||||
package render
|
||||
|
|
@ -0,0 +1,222 @@
|
|||
package render
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"encoding/json"
|
||||
"encoding/xml"
|
||||
"html/template"
|
||||
"io"
|
||||
"net/http"
|
||||
)
|
||||
|
||||
// Engine is the generic interface for all responses.
|
||||
type Engine interface {
|
||||
Render(io.Writer, interface{}) error
|
||||
}
|
||||
|
||||
// Head defines the basic ContentType and Status fields.
|
||||
type Head struct {
|
||||
ContentType string
|
||||
Status int
|
||||
}
|
||||
|
||||
// Data built-in renderer.
|
||||
type Data struct {
|
||||
Head
|
||||
}
|
||||
|
||||
// HTML built-in renderer.
|
||||
type HTML struct {
|
||||
Head
|
||||
Name string
|
||||
Templates *template.Template
|
||||
|
||||
bp GenericBufferPool
|
||||
}
|
||||
|
||||
// JSON built-in renderer.
|
||||
type JSON struct {
|
||||
Head
|
||||
Indent bool
|
||||
UnEscapeHTML bool
|
||||
Prefix []byte
|
||||
StreamingJSON bool
|
||||
}
|
||||
|
||||
// JSONP built-in renderer.
|
||||
type JSONP struct {
|
||||
Head
|
||||
Indent bool
|
||||
Callback string
|
||||
}
|
||||
|
||||
// Text built-in renderer.
|
||||
type Text struct {
|
||||
Head
|
||||
}
|
||||
|
||||
// XML built-in renderer.
|
||||
type XML struct {
|
||||
Head
|
||||
Indent bool
|
||||
Prefix []byte
|
||||
}
|
||||
|
||||
// Write outputs the header content.
|
||||
func (h Head) Write(w http.ResponseWriter) {
|
||||
w.Header().Set(ContentType, h.ContentType)
|
||||
w.WriteHeader(h.Status)
|
||||
}
|
||||
|
||||
// Render a data response.
|
||||
func (d Data) Render(w io.Writer, v interface{}) error {
|
||||
if hw, ok := w.(http.ResponseWriter); ok {
|
||||
c := hw.Header().Get(ContentType)
|
||||
if c != "" {
|
||||
d.Head.ContentType = c
|
||||
}
|
||||
d.Head.Write(hw)
|
||||
}
|
||||
|
||||
_, _ = w.Write(v.([]byte))
|
||||
return nil
|
||||
}
|
||||
|
||||
// Render a HTML response.
|
||||
func (h HTML) Render(w io.Writer, binding interface{}) error {
|
||||
var buf *bytes.Buffer
|
||||
if h.bp != nil {
|
||||
// If we have a bufferpool, allocate from it
|
||||
buf = h.bp.Get()
|
||||
defer h.bp.Put(buf)
|
||||
}
|
||||
|
||||
err := h.Templates.ExecuteTemplate(buf, h.Name, binding)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if hw, ok := w.(http.ResponseWriter); ok {
|
||||
h.Head.Write(hw)
|
||||
}
|
||||
_, _ = buf.WriteTo(w)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Render a JSON response.
|
||||
func (j JSON) Render(w io.Writer, v interface{}) error {
|
||||
if j.StreamingJSON {
|
||||
return j.renderStreamingJSON(w, v)
|
||||
}
|
||||
|
||||
var result []byte
|
||||
var err error
|
||||
|
||||
if j.Indent {
|
||||
result, err = json.MarshalIndent(v, "", " ")
|
||||
result = append(result, '\n')
|
||||
} else {
|
||||
result, err = json.Marshal(v)
|
||||
}
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// Unescape HTML if needed.
|
||||
if j.UnEscapeHTML {
|
||||
result = bytes.ReplaceAll(result, []byte("\\u003c"), []byte("<"))
|
||||
result = bytes.ReplaceAll(result, []byte("\\u003e"), []byte(">"))
|
||||
result = bytes.ReplaceAll(result, []byte("\\u0026"), []byte("&"))
|
||||
}
|
||||
|
||||
// JSON marshaled fine, write out the result.
|
||||
if hw, ok := w.(http.ResponseWriter); ok {
|
||||
j.Head.Write(hw)
|
||||
}
|
||||
if len(j.Prefix) > 0 {
|
||||
_, _ = w.Write(j.Prefix)
|
||||
}
|
||||
_, _ = w.Write(result)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (j JSON) renderStreamingJSON(w io.Writer, v interface{}) error {
|
||||
if hw, ok := w.(http.ResponseWriter); ok {
|
||||
j.Head.Write(hw)
|
||||
}
|
||||
if len(j.Prefix) > 0 {
|
||||
_, _ = w.Write(j.Prefix)
|
||||
}
|
||||
|
||||
return json.NewEncoder(w).Encode(v)
|
||||
}
|
||||
|
||||
// Render a JSONP response.
|
||||
func (j JSONP) Render(w io.Writer, v interface{}) error {
|
||||
var result []byte
|
||||
var err error
|
||||
|
||||
if j.Indent {
|
||||
result, err = json.MarshalIndent(v, "", " ")
|
||||
} else {
|
||||
result, err = json.Marshal(v)
|
||||
}
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// JSON marshaled fine, write out the result.
|
||||
if hw, ok := w.(http.ResponseWriter); ok {
|
||||
j.Head.Write(hw)
|
||||
}
|
||||
_, _ = w.Write([]byte(j.Callback + "("))
|
||||
_, _ = w.Write(result)
|
||||
_, _ = w.Write([]byte(");"))
|
||||
|
||||
// If indenting, append a new line.
|
||||
if j.Indent {
|
||||
_, _ = w.Write([]byte("\n"))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// Render a text response.
|
||||
func (t Text) Render(w io.Writer, v interface{}) error {
|
||||
if hw, ok := w.(http.ResponseWriter); ok {
|
||||
c := hw.Header().Get(ContentType)
|
||||
if c != "" {
|
||||
t.Head.ContentType = c
|
||||
}
|
||||
t.Head.Write(hw)
|
||||
}
|
||||
|
||||
_, _ = w.Write([]byte(v.(string)))
|
||||
return nil
|
||||
}
|
||||
|
||||
// Render an XML response.
|
||||
func (x XML) Render(w io.Writer, v interface{}) error {
|
||||
var result []byte
|
||||
var err error
|
||||
|
||||
if x.Indent {
|
||||
result, err = xml.MarshalIndent(v, "", " ")
|
||||
result = append(result, '\n')
|
||||
} else {
|
||||
result, err = xml.Marshal(v)
|
||||
}
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// XML marshaled fine, write out the result.
|
||||
if hw, ok := w.(http.ResponseWriter); ok {
|
||||
x.Head.Write(hw)
|
||||
}
|
||||
if len(x.Prefix) > 0 {
|
||||
_, _ = w.Write(x.Prefix)
|
||||
}
|
||||
_, _ = w.Write(result)
|
||||
return nil
|
||||
}
|
||||
|
|
@ -0,0 +1,21 @@
|
|||
package render
|
||||
|
||||
import (
|
||||
"io/ioutil"
|
||||
"path/filepath"
|
||||
)
|
||||
|
||||
type FileSystem interface {
|
||||
Walk(root string, walkFn filepath.WalkFunc) error
|
||||
ReadFile(filename string) ([]byte, error)
|
||||
}
|
||||
|
||||
type LocalFileSystem struct{}
|
||||
|
||||
func (LocalFileSystem) Walk(root string, walkFn filepath.WalkFunc) error {
|
||||
return filepath.Walk(root, walkFn)
|
||||
}
|
||||
|
||||
func (LocalFileSystem) ReadFile(filename string) ([]byte, error) {
|
||||
return ioutil.ReadFile(filename)
|
||||
}
|
||||
|
|
@ -0,0 +1,31 @@
|
|||
// +build go1.16
|
||||
|
||||
package render
|
||||
|
||||
import (
|
||||
"embed"
|
||||
"io/fs"
|
||||
"path/filepath"
|
||||
)
|
||||
|
||||
// EmbedFileSystem implements FileSystem on top of an embed.FS
|
||||
type EmbedFileSystem struct {
|
||||
embed.FS
|
||||
}
|
||||
|
||||
var _ FileSystem = &EmbedFileSystem{}
|
||||
|
||||
func (e *EmbedFileSystem) Walk(root string, walkFn filepath.WalkFunc) error {
|
||||
return fs.WalkDir(e.FS, root, func(path string, d fs.DirEntry, _ error) error {
|
||||
if d == nil {
|
||||
return nil
|
||||
}
|
||||
|
||||
info, err := d.Info()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return walkFn(path, info, err)
|
||||
})
|
||||
}
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
package render
|
||||
|
||||
import "bytes"
|
||||
|
||||
// GenericBufferPool abstracts buffer pool implementations
|
||||
type GenericBufferPool interface {
|
||||
Get() *bytes.Buffer
|
||||
Put(*bytes.Buffer)
|
||||
}
|
||||
|
|
@ -0,0 +1,19 @@
|
|||
package render
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"html/template"
|
||||
)
|
||||
|
||||
// Included helper functions for use when rendering HTML.
|
||||
var helperFuncs = template.FuncMap{
|
||||
"yield": func() (string, error) {
|
||||
return "", fmt.Errorf("yield called with no layout defined")
|
||||
},
|
||||
"partial": func() (string, error) {
|
||||
return "", fmt.Errorf("block called with no layout defined")
|
||||
},
|
||||
"current": func() (string, error) {
|
||||
return "", nil
|
||||
},
|
||||
}
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
package render
|
||||
|
||||
import "sync"
|
||||
|
||||
// rwLock represents an interface for sync.RWMutex.
|
||||
type rwLock interface {
|
||||
Lock()
|
||||
Unlock()
|
||||
RLock()
|
||||
RUnlock()
|
||||
}
|
||||
|
||||
var (
|
||||
// Ensure our interface is correct.
|
||||
_ rwLock = &sync.RWMutex{}
|
||||
_ rwLock = emptyLock{}
|
||||
)
|
||||
|
||||
// emptyLock is a noop RWLock implementation.
|
||||
type emptyLock struct{}
|
||||
|
||||
func (emptyLock) Lock() {}
|
||||
func (emptyLock) Unlock() {}
|
||||
func (emptyLock) RLock() {}
|
||||
func (emptyLock) RUnlock() {}
|
||||
|
|
@ -0,0 +1,535 @@
|
|||
package render
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
"html/template"
|
||||
"io"
|
||||
"log"
|
||||
"net/http"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"strings"
|
||||
"sync"
|
||||
|
||||
"github.com/fsnotify/fsnotify"
|
||||
)
|
||||
|
||||
const (
|
||||
// ContentBinary header value for binary data.
|
||||
ContentBinary = "application/octet-stream"
|
||||
// ContentHTML header value for HTML data.
|
||||
ContentHTML = "text/html"
|
||||
// ContentJSON header value for JSON data.
|
||||
ContentJSON = "application/json"
|
||||
// ContentJSONP header value for JSONP data.
|
||||
ContentJSONP = "application/javascript"
|
||||
// ContentLength header constant.
|
||||
ContentLength = "Content-Length"
|
||||
// ContentText header value for Text data.
|
||||
ContentText = "text/plain"
|
||||
// ContentType header constant.
|
||||
ContentType = "Content-Type"
|
||||
// ContentXHTML header value for XHTML data.
|
||||
ContentXHTML = "application/xhtml+xml"
|
||||
// ContentXML header value for XML data.
|
||||
ContentXML = "text/xml"
|
||||
// Default character encoding.
|
||||
defaultCharset = "UTF-8"
|
||||
)
|
||||
|
||||
// helperFuncs had to be moved out. See helpers.go|helpers_pre16.go files.
|
||||
|
||||
// Delims represents a set of Left and Right delimiters for HTML template rendering.
|
||||
type Delims struct {
|
||||
// Left delimiter, defaults to {{.
|
||||
Left string
|
||||
// Right delimiter, defaults to }}.
|
||||
Right string
|
||||
}
|
||||
|
||||
// Options is a struct for specifying configuration options for the render.Render object.
|
||||
type Options struct {
|
||||
// Directory to load templates. Default is "templates".
|
||||
Directory string
|
||||
// FileSystem to access files
|
||||
FileSystem FileSystem
|
||||
// Asset function to use in place of directory. Defaults to nil.
|
||||
Asset func(name string) ([]byte, error)
|
||||
// AssetNames function to use in place of directory. Defaults to nil.
|
||||
AssetNames func() []string
|
||||
// Layout template name. Will not render a layout if blank (""). Defaults to blank ("").
|
||||
Layout string
|
||||
// Extensions to parse template files from. Defaults to [".tmpl"].
|
||||
Extensions []string
|
||||
// Funcs is a slice of FuncMaps to apply to the template upon compilation. This is useful for helper functions. Defaults to empty map.
|
||||
Funcs []template.FuncMap
|
||||
// Delims sets the action delimiters to the specified strings in the Delims struct.
|
||||
Delims Delims
|
||||
// Appends the given character set to the Content-Type header. Default is "UTF-8".
|
||||
Charset string
|
||||
// If DisableCharset is set to true, it will not append the above Charset value to the Content-Type header. Default is false.
|
||||
DisableCharset bool
|
||||
// Outputs human readable JSON.
|
||||
IndentJSON bool
|
||||
// Outputs human readable XML. Default is false.
|
||||
IndentXML bool
|
||||
// Prefixes the JSON output with the given bytes. Default is false.
|
||||
PrefixJSON []byte
|
||||
// Prefixes the XML output with the given bytes.
|
||||
PrefixXML []byte
|
||||
// Allows changing the binary content type.
|
||||
BinaryContentType string
|
||||
// Allows changing the HTML content type.
|
||||
HTMLContentType string
|
||||
// Allows changing the JSON content type.
|
||||
JSONContentType string
|
||||
// Allows changing the JSONP content type.
|
||||
JSONPContentType string
|
||||
// Allows changing the Text content type.
|
||||
TextContentType string
|
||||
// Allows changing the XML content type.
|
||||
XMLContentType string
|
||||
// If IsDevelopment is set to true, this will recompile the templates on every request. Default is false.
|
||||
IsDevelopment bool
|
||||
// If UseMutexLock is set to true, the standard `sync.RWMutex` lock will be used instead of the lock free implementation. Default is false.
|
||||
// Note that when `IsDevelopment` is true, the standard `sync.RWMutex` lock is always used. Lock free is only a production feature.
|
||||
UseMutexLock bool
|
||||
// Unescape HTML characters "&<>" to their original values. Default is false.
|
||||
UnEscapeHTML bool
|
||||
// Streams JSON responses instead of marshalling prior to sending. Default is false.
|
||||
StreamingJSON bool
|
||||
// Require that all partials executed in the layout are implemented in all templates using the layout. Default is false.
|
||||
RequirePartials bool
|
||||
// Deprecated: Use the above `RequirePartials` instead of this. As of Go 1.6, blocks are built in. Default is false.
|
||||
RequireBlocks bool
|
||||
// Disables automatic rendering of http.StatusInternalServerError when an error occurs. Default is false.
|
||||
DisableHTTPErrorRendering bool
|
||||
// Enables using partials without the current filename suffix which allows use of the same template in multiple files. e.g {{ partial "carosuel" }} inside the home template will match carosel-home or carosel.
|
||||
// ***NOTE*** - This option should be named RenderPartialsWithoutSuffix as that is what it does. "Prefix" is a typo. Maintaining the existing name for backwards compatibility.
|
||||
RenderPartialsWithoutPrefix bool
|
||||
// BufferPool to use when rendering HTML templates. If none is supplied
|
||||
// defaults to SizedBufferPool of size 32 with 512KiB buffers.
|
||||
BufferPool GenericBufferPool
|
||||
}
|
||||
|
||||
// HTMLOptions is a struct for overriding some rendering Options for specific HTML call.
|
||||
type HTMLOptions struct {
|
||||
// Layout template name. Overrides Options.Layout.
|
||||
Layout string
|
||||
// Funcs added to Options.Funcs.
|
||||
Funcs template.FuncMap
|
||||
}
|
||||
|
||||
// Render is a service that provides functions for easily writing JSON, XML,
|
||||
// binary data, and HTML templates out to a HTTP Response.
|
||||
type Render struct {
|
||||
lock rwLock
|
||||
|
||||
// Customize Secure with an Options struct.
|
||||
opt Options
|
||||
templates *template.Template
|
||||
compiledCharset string
|
||||
hasWatcher bool
|
||||
}
|
||||
|
||||
// New constructs a new Render instance with the supplied options.
|
||||
func New(options ...Options) *Render {
|
||||
var o Options
|
||||
if len(options) > 0 {
|
||||
o = options[0]
|
||||
}
|
||||
|
||||
r := Render{opt: o}
|
||||
|
||||
r.prepareOptions()
|
||||
r.CompileTemplates()
|
||||
|
||||
return &r
|
||||
}
|
||||
|
||||
func (r *Render) prepareOptions() {
|
||||
// Fill in the defaults if need be.
|
||||
if len(r.opt.Charset) == 0 {
|
||||
r.opt.Charset = defaultCharset
|
||||
}
|
||||
if !r.opt.DisableCharset {
|
||||
r.compiledCharset = "; charset=" + r.opt.Charset
|
||||
}
|
||||
if len(r.opt.Directory) == 0 {
|
||||
r.opt.Directory = "templates"
|
||||
}
|
||||
if r.opt.FileSystem == nil {
|
||||
r.opt.FileSystem = &LocalFileSystem{}
|
||||
}
|
||||
if len(r.opt.Extensions) == 0 {
|
||||
r.opt.Extensions = []string{".tmpl"}
|
||||
}
|
||||
if len(r.opt.BinaryContentType) == 0 {
|
||||
r.opt.BinaryContentType = ContentBinary
|
||||
}
|
||||
if len(r.opt.HTMLContentType) == 0 {
|
||||
r.opt.HTMLContentType = ContentHTML
|
||||
}
|
||||
if len(r.opt.JSONContentType) == 0 {
|
||||
r.opt.JSONContentType = ContentJSON
|
||||
}
|
||||
if len(r.opt.JSONPContentType) == 0 {
|
||||
r.opt.JSONPContentType = ContentJSONP
|
||||
}
|
||||
if len(r.opt.TextContentType) == 0 {
|
||||
r.opt.TextContentType = ContentText
|
||||
}
|
||||
if len(r.opt.XMLContentType) == 0 {
|
||||
r.opt.XMLContentType = ContentXML
|
||||
}
|
||||
if r.opt.BufferPool == nil {
|
||||
r.opt.BufferPool = NewSizedBufferPool(32, 1<<19) // 32 buffers of size 512KiB each
|
||||
}
|
||||
if r.opt.IsDevelopment || r.opt.UseMutexLock {
|
||||
r.lock = &sync.RWMutex{}
|
||||
} else {
|
||||
r.lock = &emptyLock{}
|
||||
}
|
||||
}
|
||||
|
||||
func (r *Render) CompileTemplates() {
|
||||
if r.opt.Asset == nil || r.opt.AssetNames == nil {
|
||||
r.compileTemplatesFromDir()
|
||||
return
|
||||
}
|
||||
|
||||
r.compileTemplatesFromAsset()
|
||||
}
|
||||
|
||||
func (r *Render) compileTemplatesFromDir() {
|
||||
dir := r.opt.Directory
|
||||
tmpTemplates := template.New(dir)
|
||||
tmpTemplates.Delims(r.opt.Delims.Left, r.opt.Delims.Right)
|
||||
|
||||
var watcher *fsnotify.Watcher
|
||||
if r.opt.IsDevelopment {
|
||||
var err error
|
||||
watcher, err = fsnotify.NewWatcher()
|
||||
if err != nil {
|
||||
log.Printf("Unable to create new watcher for template files. Templates will be recompiled on every render. Error: %v\n", err)
|
||||
}
|
||||
}
|
||||
|
||||
// Walk the supplied directory and compile any files that match our extension list.
|
||||
_ = r.opt.FileSystem.Walk(dir, func(path string, info os.FileInfo, _ error) error {
|
||||
// Fix same-extension-dirs bug: some dir might be named to: "users.tmpl", "local.html".
|
||||
// These dirs should be excluded as they are not valid golang templates, but files under
|
||||
// them should be treat as normal.
|
||||
// If is a dir, return immediately (dir is not a valid golang template).
|
||||
if info != nil && watcher != nil {
|
||||
_ = watcher.Add(path)
|
||||
}
|
||||
if info == nil || info.IsDir() {
|
||||
return nil
|
||||
}
|
||||
|
||||
rel, err := filepath.Rel(dir, path)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
ext := ""
|
||||
if strings.Contains(rel, ".") {
|
||||
ext = filepath.Ext(rel)
|
||||
}
|
||||
|
||||
for _, extension := range r.opt.Extensions {
|
||||
if ext == extension {
|
||||
buf, err := r.opt.FileSystem.ReadFile(path)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
name := (rel[0 : len(rel)-len(ext)])
|
||||
tmpl := tmpTemplates.New(filepath.ToSlash(name))
|
||||
|
||||
// Add our funcmaps.
|
||||
for _, funcs := range r.opt.Funcs {
|
||||
tmpl.Funcs(funcs)
|
||||
}
|
||||
|
||||
// Break out if this parsing fails. We don't want any silent server starts.
|
||||
template.Must(tmpl.Funcs(helperFuncs).Parse(string(buf)))
|
||||
break
|
||||
}
|
||||
}
|
||||
return nil
|
||||
})
|
||||
|
||||
r.lock.Lock()
|
||||
defer r.lock.Unlock()
|
||||
r.templates = tmpTemplates
|
||||
if r.hasWatcher = watcher != nil; r.hasWatcher {
|
||||
go func() {
|
||||
select {
|
||||
case _, ok := <-watcher.Events:
|
||||
if !ok {
|
||||
return
|
||||
}
|
||||
case _, ok := <-watcher.Errors:
|
||||
if !ok {
|
||||
return
|
||||
}
|
||||
}
|
||||
watcher.Close()
|
||||
r.CompileTemplates()
|
||||
}()
|
||||
}
|
||||
}
|
||||
|
||||
func (r *Render) compileTemplatesFromAsset() {
|
||||
dir := r.opt.Directory
|
||||
tmpTemplates := template.New(dir)
|
||||
tmpTemplates.Delims(r.opt.Delims.Left, r.opt.Delims.Right)
|
||||
|
||||
for _, path := range r.opt.AssetNames() {
|
||||
if !strings.HasPrefix(path, dir) {
|
||||
continue
|
||||
}
|
||||
|
||||
rel, err := filepath.Rel(dir, path)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
ext := ""
|
||||
if strings.Contains(rel, ".") {
|
||||
ext = "." + strings.Join(strings.Split(rel, ".")[1:], ".")
|
||||
}
|
||||
|
||||
for _, extension := range r.opt.Extensions {
|
||||
if ext == extension {
|
||||
buf, err := r.opt.Asset(path)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
name := (rel[0 : len(rel)-len(ext)])
|
||||
tmpl := tmpTemplates.New(filepath.ToSlash(name))
|
||||
|
||||
// Add our funcmaps.
|
||||
for _, funcs := range r.opt.Funcs {
|
||||
tmpl.Funcs(funcs)
|
||||
}
|
||||
|
||||
// Break out if this parsing fails. We don't want any silent server starts.
|
||||
template.Must(tmpl.Funcs(helperFuncs).Parse(string(buf)))
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
r.lock.Lock()
|
||||
defer r.lock.Unlock()
|
||||
r.templates = tmpTemplates
|
||||
}
|
||||
|
||||
// TemplateLookup is a wrapper around template.Lookup and returns
|
||||
// the template with the given name that is associated with t, or nil
|
||||
// if there is no such template.
|
||||
func (r *Render) TemplateLookup(t string) *template.Template {
|
||||
r.lock.RLock()
|
||||
defer r.lock.RUnlock()
|
||||
return r.templates.Lookup(t)
|
||||
}
|
||||
|
||||
func (r *Render) execute(templates *template.Template, name string, binding interface{}) (*bytes.Buffer, error) {
|
||||
buf := new(bytes.Buffer)
|
||||
return buf, templates.ExecuteTemplate(buf, name, binding)
|
||||
}
|
||||
|
||||
func (r *Render) layoutFuncs(templates *template.Template, name string, binding interface{}) template.FuncMap {
|
||||
return template.FuncMap{
|
||||
"yield": func() (template.HTML, error) {
|
||||
buf, err := r.execute(templates, name, binding)
|
||||
// Return safe HTML here since we are rendering our own template.
|
||||
return template.HTML(buf.String()), err
|
||||
},
|
||||
"current": func() (string, error) {
|
||||
return name, nil
|
||||
},
|
||||
"block": func(partialName string) (template.HTML, error) {
|
||||
log.Println("Render's `block` implementation is now depericated. Use `partial` as a drop in replacement.")
|
||||
fullPartialName := fmt.Sprintf("%s-%s", partialName, name)
|
||||
if templates.Lookup(fullPartialName) == nil && r.opt.RenderPartialsWithoutPrefix {
|
||||
fullPartialName = partialName
|
||||
}
|
||||
if r.opt.RequireBlocks || templates.Lookup(fullPartialName) != nil {
|
||||
buf, err := r.execute(templates, fullPartialName, binding)
|
||||
// Return safe HTML here since we are rendering our own template.
|
||||
return template.HTML(buf.String()), err
|
||||
}
|
||||
return "", nil
|
||||
},
|
||||
"partial": func(partialName string) (template.HTML, error) {
|
||||
fullPartialName := fmt.Sprintf("%s-%s", partialName, name)
|
||||
if templates.Lookup(fullPartialName) == nil && r.opt.RenderPartialsWithoutPrefix {
|
||||
fullPartialName = partialName
|
||||
}
|
||||
if r.opt.RequirePartials || templates.Lookup(fullPartialName) != nil {
|
||||
buf, err := r.execute(templates, fullPartialName, binding)
|
||||
// Return safe HTML here since we are rendering our own template.
|
||||
return template.HTML(buf.String()), err
|
||||
}
|
||||
return "", nil
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
func (r *Render) prepareHTMLOptions(htmlOpt []HTMLOptions) HTMLOptions {
|
||||
layout := r.opt.Layout
|
||||
funcs := template.FuncMap{}
|
||||
|
||||
for _, tmp := range r.opt.Funcs {
|
||||
for k, v := range tmp {
|
||||
funcs[k] = v
|
||||
}
|
||||
}
|
||||
|
||||
if len(htmlOpt) > 0 {
|
||||
opt := htmlOpt[0]
|
||||
if len(opt.Layout) > 0 {
|
||||
layout = opt.Layout
|
||||
}
|
||||
|
||||
for k, v := range opt.Funcs {
|
||||
funcs[k] = v
|
||||
}
|
||||
}
|
||||
|
||||
return HTMLOptions{
|
||||
Layout: layout,
|
||||
Funcs: funcs,
|
||||
}
|
||||
}
|
||||
|
||||
// Render is the generic function called by XML, JSON, Data, HTML, and can be called by custom implementations.
|
||||
func (r *Render) Render(w io.Writer, e Engine, data interface{}) error {
|
||||
err := e.Render(w, data)
|
||||
if hw, ok := w.(http.ResponseWriter); err != nil && !r.opt.DisableHTTPErrorRendering && ok {
|
||||
http.Error(hw, err.Error(), http.StatusInternalServerError)
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
// Data writes out the raw bytes as binary data.
|
||||
func (r *Render) Data(w io.Writer, status int, v []byte) error {
|
||||
head := Head{
|
||||
ContentType: r.opt.BinaryContentType,
|
||||
Status: status,
|
||||
}
|
||||
|
||||
d := Data{
|
||||
Head: head,
|
||||
}
|
||||
|
||||
return r.Render(w, d, v)
|
||||
}
|
||||
|
||||
// HTML builds up the response from the specified template and bindings.
|
||||
func (r *Render) HTML(w io.Writer, status int, name string, binding interface{}, htmlOpt ...HTMLOptions) error {
|
||||
// If we are in development mode, recompile the templates on every HTML request.
|
||||
r.lock.RLock() // rlock here because we're reading the hasWatcher
|
||||
if r.opt.IsDevelopment && !r.hasWatcher {
|
||||
r.lock.RUnlock() // runlock here because CompileTemplates will lock
|
||||
r.CompileTemplates()
|
||||
r.lock.RLock()
|
||||
}
|
||||
templates := r.templates
|
||||
r.lock.RUnlock()
|
||||
|
||||
opt := r.prepareHTMLOptions(htmlOpt)
|
||||
if tpl := templates.Lookup(name); tpl != nil {
|
||||
if len(opt.Layout) > 0 {
|
||||
tpl.Funcs(r.layoutFuncs(templates, name, binding))
|
||||
name = opt.Layout
|
||||
}
|
||||
|
||||
if len(opt.Funcs) > 0 {
|
||||
tpl.Funcs(opt.Funcs)
|
||||
}
|
||||
}
|
||||
|
||||
head := Head{
|
||||
ContentType: r.opt.HTMLContentType + r.compiledCharset,
|
||||
Status: status,
|
||||
}
|
||||
|
||||
h := HTML{
|
||||
Head: head,
|
||||
Name: name,
|
||||
Templates: templates,
|
||||
bp: r.opt.BufferPool,
|
||||
}
|
||||
|
||||
return r.Render(w, h, binding)
|
||||
}
|
||||
|
||||
// JSON marshals the given interface object and writes the JSON response.
|
||||
func (r *Render) JSON(w io.Writer, status int, v interface{}) error {
|
||||
head := Head{
|
||||
ContentType: r.opt.JSONContentType + r.compiledCharset,
|
||||
Status: status,
|
||||
}
|
||||
|
||||
j := JSON{
|
||||
Head: head,
|
||||
Indent: r.opt.IndentJSON,
|
||||
Prefix: r.opt.PrefixJSON,
|
||||
UnEscapeHTML: r.opt.UnEscapeHTML,
|
||||
StreamingJSON: r.opt.StreamingJSON,
|
||||
}
|
||||
|
||||
return r.Render(w, j, v)
|
||||
}
|
||||
|
||||
// JSONP marshals the given interface object and writes the JSON response.
|
||||
func (r *Render) JSONP(w io.Writer, status int, callback string, v interface{}) error {
|
||||
head := Head{
|
||||
ContentType: r.opt.JSONPContentType + r.compiledCharset,
|
||||
Status: status,
|
||||
}
|
||||
|
||||
j := JSONP{
|
||||
Head: head,
|
||||
Indent: r.opt.IndentJSON,
|
||||
Callback: callback,
|
||||
}
|
||||
|
||||
return r.Render(w, j, v)
|
||||
}
|
||||
|
||||
// Text writes out a string as plain text.
|
||||
func (r *Render) Text(w io.Writer, status int, v string) error {
|
||||
head := Head{
|
||||
ContentType: r.opt.TextContentType + r.compiledCharset,
|
||||
Status: status,
|
||||
}
|
||||
|
||||
t := Text{
|
||||
Head: head,
|
||||
}
|
||||
|
||||
return r.Render(w, t, v)
|
||||
}
|
||||
|
||||
// XML marshals the given interface object and writes the XML response.
|
||||
func (r *Render) XML(w io.Writer, status int, v interface{}) error {
|
||||
head := Head{
|
||||
ContentType: r.opt.XMLContentType + r.compiledCharset,
|
||||
Status: status,
|
||||
}
|
||||
|
||||
x := XML{
|
||||
Head: head,
|
||||
Indent: r.opt.IndentXML,
|
||||
Prefix: r.opt.PrefixXML,
|
||||
}
|
||||
|
||||
return r.Render(w, x, v)
|
||||
}
|
||||
|
|
@ -0,0 +1,62 @@
|
|||
package render
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
)
|
||||
|
||||
// Pulled from the github.com/oxtoacart/bpool package (Apache licensed).
|
||||
|
||||
// SizedBufferPool implements a pool of bytes.Buffers in the form of a bounded
|
||||
// channel. Buffers are pre-allocated to the requested size.
|
||||
type SizedBufferPool struct {
|
||||
c chan *bytes.Buffer
|
||||
a int
|
||||
}
|
||||
|
||||
// NewSizedBufferPool creates a new BufferPool bounded to the given size.
|
||||
// size defines the number of buffers to be retained in the pool and alloc sets
|
||||
// the initial capacity of new buffers to minimize calls to make().
|
||||
//
|
||||
// The value of alloc should seek to provide a buffer that is representative of
|
||||
// most data written to the the buffer (i.e. 95th percentile) without being
|
||||
// overly large (which will increase static memory consumption). You may wish to
|
||||
// track the capacity of your last N buffers (i.e. using an []int) prior to
|
||||
// returning them to the pool as input into calculating a suitable alloc value.
|
||||
func NewSizedBufferPool(size int, alloc int) (bp *SizedBufferPool) {
|
||||
return &SizedBufferPool{
|
||||
c: make(chan *bytes.Buffer, size),
|
||||
a: alloc,
|
||||
}
|
||||
}
|
||||
|
||||
// Get gets a Buffer from the SizedBufferPool, or creates a new one if none are
|
||||
// available in the pool. Buffers have a pre-allocated capacity.
|
||||
func (bp *SizedBufferPool) Get() (b *bytes.Buffer) {
|
||||
select {
|
||||
case b = <-bp.c:
|
||||
// reuse existing buffer
|
||||
default:
|
||||
// create new buffer
|
||||
b = bytes.NewBuffer(make([]byte, 0, bp.a))
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
// Put returns the given Buffer to the SizedBufferPool.
|
||||
func (bp *SizedBufferPool) Put(b *bytes.Buffer) {
|
||||
b.Reset()
|
||||
|
||||
// Release buffers over our maximum capacity and re-create a pre-sized
|
||||
// buffer to replace it.
|
||||
// Note that the cap(b.Bytes()) provides the capacity from the read off-set
|
||||
// only, but as we've called b.Reset() the full capacity of the underlying
|
||||
// byte slice is returned.
|
||||
if cap(b.Bytes()) > bp.a {
|
||||
b = bytes.NewBuffer(make([]byte, 0, bp.a))
|
||||
}
|
||||
|
||||
select {
|
||||
case bp.c <- b:
|
||||
default: // Discard the buffer if the pool is full.
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1 @@
|
|||
<h1>Admin {{.}}</h1>
|
||||
3
vendor/github.com/unrolled/render/testdata/basic/another_layout.tmpl
generated
vendored
Normal file
3
vendor/github.com/unrolled/render/testdata/basic/another_layout.tmpl
generated
vendored
Normal file
|
|
@ -0,0 +1,3 @@
|
|||
another head
|
||||
{{ yield }}
|
||||
another foot
|
||||
|
|
@ -0,0 +1 @@
|
|||
<h1>{{ . }}</h1>
|
||||
3
vendor/github.com/unrolled/render/testdata/basic/current_layout.tmpl
generated
vendored
Normal file
3
vendor/github.com/unrolled/render/testdata/basic/current_layout.tmpl
generated
vendored
Normal file
|
|
@ -0,0 +1,3 @@
|
|||
{{ current }} head
|
||||
{{ yield }}
|
||||
{{ current }} foot
|
||||
|
|
@ -0,0 +1 @@
|
|||
<h1>Hello {[{.}]}</h1>
|
||||
|
|
@ -0,0 +1 @@
|
|||
<h1>Hello {{.}}</h1>
|
||||
|
|
@ -0,0 +1 @@
|
|||
Hypertext!
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
head
|
||||
{{ yield }}
|
||||
foot
|
||||
1
vendor/github.com/unrolled/render/testdata/blocks/content-partial.tmpl
generated
vendored
Normal file
1
vendor/github.com/unrolled/render/testdata/blocks/content-partial.tmpl
generated
vendored
Normal file
|
|
@ -0,0 +1 @@
|
|||
{{define "after-content-partial"}}after {{ . }}{{end}}
|
||||
|
|
@ -0,0 +1,2 @@
|
|||
{{define "before-content"}}before {{ . }}{{end}}
|
||||
{{define "after-content"}}after {{ . }}{{end}}
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
{{ block "before" }}
|
||||
<h1>during</h1>
|
||||
{{ block "after" }}
|
||||
|
|
@ -0,0 +1 @@
|
|||
{{ myCustomFunc }}
|
||||
1
vendor/github.com/unrolled/render/testdata/partials/content-partial.tmpl
generated
vendored
Normal file
1
vendor/github.com/unrolled/render/testdata/partials/content-partial.tmpl
generated
vendored
Normal file
|
|
@ -0,0 +1 @@
|
|||
{{define "after-content-partial"}}after {{ . }}{{end}}
|
||||
|
|
@ -0,0 +1,2 @@
|
|||
{{define "before-content"}}before {{ . }}{{end}}
|
||||
{{define "after-content"}}after {{ . }}{{end}}
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
{{ partial "before" }}
|
||||
<h1>during</h1>
|
||||
{{ partial "after" }}
|
||||
0
vendor/github.com/unrolled/render/testdata/template-dir-test/0.tmpl
generated
vendored
Normal file
0
vendor/github.com/unrolled/render/testdata/template-dir-test/0.tmpl
generated
vendored
Normal file
0
vendor/github.com/unrolled/render/testdata/template-dir-test/dedicated.tmpl/notbad.tmpl
generated
vendored
Normal file
0
vendor/github.com/unrolled/render/testdata/template-dir-test/dedicated.tmpl/notbad.tmpl
generated
vendored
Normal file
0
vendor/github.com/unrolled/render/testdata/template-dir-test/subdir/1.tmpl
generated
vendored
Normal file
0
vendor/github.com/unrolled/render/testdata/template-dir-test/subdir/1.tmpl
generated
vendored
Normal file
|
|
@ -0,0 +1,3 @@
|
|||
# This source code refers to The Go Authors for copyright purposes.
|
||||
# The master list of authors is in the main Go distribution,
|
||||
# visible at http://tip.golang.org/AUTHORS.
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
# This source code was written by the Go contributors.
|
||||
# The master list of contributors is in the main Go distribution,
|
||||
# visible at http://tip.golang.org/CONTRIBUTORS.
|
||||
|
|
@ -0,0 +1,27 @@
|
|||
Copyright (c) 2009 The Go Authors. All rights reserved.
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are
|
||||
met:
|
||||
|
||||
* Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
* Redistributions in binary form must reproduce the above
|
||||
copyright notice, this list of conditions and the following disclaimer
|
||||
in the documentation and/or other materials provided with the
|
||||
distribution.
|
||||
* Neither the name of Google Inc. nor the names of its
|
||||
contributors may be used to endorse or promote products derived from
|
||||
this software without specific prior written permission.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
|
@ -0,0 +1,22 @@
|
|||
Additional IP Rights Grant (Patents)
|
||||
|
||||
"This implementation" means the copyrightable works distributed by
|
||||
Google as part of the Go project.
|
||||
|
||||
Google hereby grants to You a perpetual, worldwide, non-exclusive,
|
||||
no-charge, royalty-free, irrevocable (except as stated in this section)
|
||||
patent license to make, have made, use, offer to sell, sell, import,
|
||||
transfer and otherwise run, modify and propagate the contents of this
|
||||
implementation of Go, where such license applies only to those patent
|
||||
claims, both currently owned or controlled by Google and acquired in
|
||||
the future, licensable by Google that are necessarily infringed by this
|
||||
implementation of Go. This grant does not include claims that would be
|
||||
infringed only as a consequence of further modification of this
|
||||
implementation. If you or your agent or exclusive licensee institute or
|
||||
order or agree to the institution of patent litigation against any
|
||||
entity (including a cross-claim or counterclaim in a lawsuit) alleging
|
||||
that this implementation of Go or any code incorporated within this
|
||||
implementation of Go constitutes direct or contributory patent
|
||||
infringement, or inducement of patent infringement, then any patent
|
||||
rights granted to you under this License for this implementation of Go
|
||||
shall terminate as of the date such litigation is filed.
|
||||
Some files were not shown because too many files have changed in this diff Show More
Loading…
Reference in New Issue