1package negroni 2 3import ( 4 "log" 5 "net/http" 6 "os" 7 "time" 8) 9 10// Logger is a middleware handler that logs the request as it goes in and the response as it goes out. 11type Logger struct { 12 // Logger inherits from log.Logger used to log messages with the Logger middleware 13 *log.Logger 14} 15 16// NewLogger returns a new Logger instance 17func NewLogger() *Logger { 18 return &Logger{log.New(os.Stdout, "[negroni] ", 0)} 19} 20 21func (l *Logger) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) { 22 start := time.Now() 23 l.Printf("Started %s %s", r.Method, r.URL.Path) 24 25 next(rw, r) 26 27 res := rw.(ResponseWriter) 28 l.Printf("Completed %v %s in %v", res.Status(), http.StatusText(res.Status()), time.Since(start)) 29} 30