glg is simple golang logging library
Go 1.16
go get github.com/kpango/glgpackage main
import (
"net/http"
"time"
"github.com/kpango/glg"
)
// NetWorkLogger sample network logger
type NetWorkLogger struct{}
func (n NetWorkLogger) Write(b []byte) (int, error) {
// http.Post("localhost:8080/log", "", bytes.NewReader(b))
http.Get("http://127.0.0.1:8080/log")
glg.Success("Requested")
glg.Infof("RawString is %s", glg.RawString(b))
return 1, nil
}
func main() {
// var errWriter io.Writer
// var customWriter io.Writer
infolog := glg.FileWriter("/tmp/info.log", 0666)
customTag := "FINE"
customErrTag := "CRIT"
errlog := glg.FileWriter("/tmp/error.log", 0666)
defer infolog.Close()
defer errlog.Close()
glg.Get().
SetMode(glg.BOTH). // default is STD
// DisableColor().
// SetMode(glg.NONE).
// SetMode(glg.WRITER).
// SetMode(glg.BOTH).
// InitWriter().
// AddWriter(customWriter).
// SetWriter(customWriter).
// AddLevelWriter(glg.LOG, customWriter).
// AddLevelWriter(glg.INFO, customWriter).
// AddLevelWriter(glg.WARN, customWriter).
// AddLevelWriter(glg.ERR, customWriter).
// SetLevelWriter(glg.LOG, customWriter).
// SetLevelWriter(glg.INFO, customWriter).
// SetLevelWriter(glg.WARN, customWriter).
// SetLevelWriter(glg.ERR, customWriter).
// EnableJSON().
SetLineTraceMode(glg.TraceLineNone).
AddLevelWriter(glg.INFO, infolog). // add info log file destination
AddLevelWriter(glg.ERR, errlog). // add error log file destination
AddLevelWriter(glg.WARN, rotate) // add error log file destination
glg.Info("info")
glg.Infof("%s : %s", "info", "formatted")
glg.Log("log")
glg.Logf("%s : %s", "info", "formatted")
glg.Debug("debug")
glg.Debugf("%s : %s", "info", "formatted")
glg.Trace("Trace")
glg.Tracef("%s : %s", "tracef", "formatted")
glg.Warn("warn")
glg.Warnf("%s : %s", "info", "formatted")
glg.Error("error")
glg.Errorf("%s : %s", "info", "formatted")
glg.Success("ok")
glg.Successf("%s : %s", "info", "formatted")
glg.Fail("fail")
glg.Failf("%s : %s", "info", "formatted")
glg.Print("Print")
glg.Println("Println")
glg.Printf("%s : %s", "printf", "formatted")
// set global log level to ERR level
glg.Info("before setting level to ERR this message will show")
glg.Get().SetLevel(glg.ERR)
glg.Info("after setting level to ERR this message will not show")
glg.Error("this log is ERR level this will show")
glg.Get().SetLevel(glg.DEBG)
glg.Info("log level is now DEBG, this INFO level log will show")
glg.Get().
AddStdLevel(customTag, glg.STD, false). // user custom log level
AddErrLevel(customErrTag, glg.STD, true). // user custom error log level
SetLevelColor(glg.TagStringToLevel(customTag), glg.Cyan). // set color output to user custom level
SetLevelColor(glg.TagStringToLevel(customErrTag), glg.Red) // set color output to user custom level
glg.CustomLog(customTag, "custom logging")
glg.CustomLog(customErrTag, "custom error logging")
// glg.Info("kpango's glg supports disable timestamp for logging")
glg.Get().DisableTimestamp()
glg.Info("timestamp disabled")
glg.Warn("timestamp disabled")
glg.Log("timestamp disabled")
glg.Get().EnableTimestamp()
glg.Info("timestamp enabled")
glg.Warn("timestamp enabled")
glg.Log("timestamp enabled")
glg.Info("kpango's glg support line trace logging")
glg.Error("error log shows short line trace by default")
glg.Info("error log shows none trace by default")
glg.Get().SetLineTraceMode(glg.TraceLineShort)
glg.Error("after configure TraceLineShort, error log shows short line trace")
glg.Info("after configure TraceLineShort, info log shows short line trace")
glg.Get().DisableTimestamp()
glg.Error("after configure TraceLineShort and DisableTimestamp, error log shows short line trace without timestamp")
glg.Info("after configure TraceLineShort and DisableTimestamp, info log shows short line trace without timestamp")
glg.Get().EnableTimestamp()
glg.Get().SetLineTraceMode(glg.TraceLineLong)
glg.Error("after configure TraceLineLong, error log shows long line trace")
glg.Info("after configure TraceLineLong, info log shows long line trace")
glg.Get().DisableTimestamp()
glg.Error("after configure TraceLineLong and DisableTimestamp, error log shows long line trace without timestamp")
glg.Info("after configure TraceLineLong and DisableTimestamp, info log shows long line trace without timestamp")
glg.Get().EnableTimestamp()
glg.Get().SetLineTraceMode(glg.TraceLineNone)
glg.Error("after configure TraceLineNone, error log without line trace")
glg.Info("after configure TraceLineNone, info log without line trace")
glg.Get().SetLevelLineTraceMode(glg.INFO, glg.TraceLineLong)
glg.Info("after configure Level trace INFO=TraceLineLong, only info log shows long line trace")
glg.Error("after configure Level trace INFO=TraceLineLong, error log without long line trace")
glg.Get().SetLevelLineTraceMode(glg.ERR, glg.TraceLineShort)
glg.Info("after configure Level trace ERR=TraceLineShort, info log still shows long line trace")
glg.Error("after configure Level trace ERR=TraceLineShort, error log now shows short line trace")
glg.Get().SetLineTraceMode(glg.TraceLineNone)
glg.Info("kpango's glg support json logging")
glg.Get().EnableJSON()
err := glg.Warn("kpango's glg", "support", "json", "logging")
if err != nil {
glg.Get().DisableJSON()
glg.Error(err)
glg.Get().EnableJSON()
}
err = glg.Info("hello", struct {
Name string
Age int
Gender string
}{
Name: "kpango",
Age: 28,
Gender: "male",
}, 2020)
if err != nil {
glg.Get().DisableJSON()
glg.Error(err)
glg.Get().EnableJSON()
} glg.CustomLog(customTag, "custom logging")
glg.CustomLog(customErrTag, "custom error logging")
glg.Get().AddLevelWriter(glg.DEBG, NetWorkLogger{}) // add info log file destination
http.Handle("/glg", glg.HTTPLoggerFunc("glg sample", func(w http.ResponseWriter, r *http.Request) {
glg.New().
AddLevelWriter(glg.Info, NetWorkLogger{}).
AddLevelWriter(glg.Info, w).
Info("glg HTTP server logger sample")
}))
http.ListenAndServe("port", nil)
// fatal logging
glg.Fatalln("fatal")
}
- Fork it ( https://github.com/kpango/glg/fork )
- Create your feature branch (git checkout -b my-new-feature)
- Commit your changes (git commit -am 'Add some feature')
- Push to the branch (git push origin my-new-feature)
- Create new Pull Request
glg released under MIT license, refer LICENSE file.
