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log.go
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log.go
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/* -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.
* File Name : log.go
* Purpose :
* Creation Date : 08-27-2017
* Last Modified : Sun Aug 27 17:44:33 2017
* Created By : Kiyor
_._._._._._._._._._._._._._._._._._._._._.*/
package main
import (
"context"
"fmt"
"log"
"net/http"
"time"
)
type statusWriter struct {
http.ResponseWriter
status int
length int
}
func (w *statusWriter) WriteHeader(status int) {
w.status = status
w.ResponseWriter.WriteHeader(status)
}
func (w *statusWriter) Write(b []byte) (int, error) {
if w.status == 0 {
w.status = 200
}
w.length = len(b)
return w.ResponseWriter.Write(b)
}
func LogHandler(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
t1 := time.Now()
ctx := context.Background()
writer := statusWriter{w, 0, 0}
r = r.WithContext(ctx)
next.ServeHTTP(&writer, r)
rang := r.Header.Get("Range")
if len(rang) == 0 {
rang = "-"
}
res := fmt.Sprintf("%v %v %v %v %v %v %v", r.RemoteAddr, writer.status, writer.length, r.Method, r.Host+r.RequestURI, rang, time.Since(t1))
log.Println(res)
})
}