code: func AccessLog(rw http.ResponseWriter, req *http.Request, next http.HandlerFunc) {
  	start := time.Now()
  	w := &responseWriter{
  		ResponseWriter: rw,
  	}
  	next(w, req)
  	end := time.Now()
  
  	webgo.LOGHANDLER.Info(
  		fmt.Sprintf(
  			"%s %s %s %s %d",
  			end.Format("2006-01-02 15:04:05 -0700 MST"),
  			req.Method,
  			req.URL.String(),
  			end.Sub(start).String(),
  			w.code,
  		),
  	)
  }
docs: // AccessLog is a middleware which prints access log to stdout