http-server-status/main.go
2023-07-21 11:52:30 +02:00

132 lines
No EOL
2.9 KiB
Go

package main
import (
_ "embed"
"encoding/json"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
checks "http-server-status/internal/pkg/checks"
"net/http"
"os"
"sync"
"text/template"
)
//go:embed template/index.html
var s string
var (
version = "development"
)
var checkList []checks.Check
func init() {
readConfig()
pp := log.Output(zerolog.ConsoleWriter{Out: os.Stdout})
multi := zerolog.MultiLevelWriter(pp)
log.Logger = zerolog.New(multi).With().Timestamp().Caller().Logger()
checkList = append(checkList, checks.HDD{c.Checks.HDD}, checks.Memory{Config: c.Checks.Memory}, checks.Load{Config: c.Checks.Load}, checks.Systemd{Config: c.Checks.Systemd}, checks.Version{Config: c.Checks.Version})
}
func auth(fn http.HandlerFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
if c.Auth.Enabled {
user, pass, _ := r.BasicAuth()
if !check(user, pass) {
w.Header().Set("WWW-Authenticate", `Basic realm="MY REALM"`)
http.Error(w, "Unauthorized.", 401)
return
}
}
fn(w, r)
}
}
func check(u, p string) bool {
if u == c.Auth.Username && p == c.Auth.Password {
return true
}
return false
}
func main() {
http.HandleFunc("/", auth(func(writer http.ResponseWriter, request *http.Request) {
res, gloableRes := checkSystem()
if gloableRes == false {
writer.WriteHeader(http.StatusInternalServerError)
}
t, err := template.New("todos").Parse(s)
if err != nil {
panic(err)
}
t.Execute(writer, map[string]interface{}{"checks":res, "version": version})
//writer.Write([]byte(s))
}))
http.HandleFunc("/data.json", auth(handler))
err := http.ListenAndServe(c.HTTP.Listen, nil)
log.Fatal().Err(err).Msg("Shutdown")
}
func handler(w http.ResponseWriter, r *http.Request) {
res, gloableRes := checkSystem()
httpResposne := struct {
Checks map[string]ResultReturn
Config Config
}{Checks: res, Config: c}
resJson, err := json.Marshal(httpResposne)
if err != nil {
log.Fatal().Err(err).Interface("httpResponse", ResultReturn{}).Msg("Check Error")
}
if gloableRes {
w.Write(resJson)
return
}
http.Error(w, string(resJson), http.StatusInternalServerError)
}
type ResultReturn struct {
Success bool `json:"success"`
Data interface{} `json:"data"`
}
func checkSystem() (map[string]ResultReturn, bool) {
globaleResult := true
wg := sync.WaitGroup{}
res := make(map[string]ResultReturn)
mutex := sync.Mutex{}
for _, c := range checkList {
wg.Add(1)
go func(check checks.Check) {
defer wg.Done()
s, data, err := check.Execute()
if err != nil {
log.Error().Err(err).Msg("Cant execute check")
return
}
log.Debug().Str("check", check.Name()).Bool("status", s).Interface("Data", data).Msg("Executed Check, got Results")
if s == false {
globaleResult = false
}
mutex.Lock()
res[check.Name()] = ResultReturn{
Success: s,
Data: data,
}
mutex.Unlock()
}(c)
}
wg.Wait()
return res, globaleResult
}