Aether/backend/pkg/middleware/logger.go

package middleware

import (
	"net/http"
	"time"

	"github.com/rs/zerolog"
	"github.com/rs/zerolog/log"
)

func Logger(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		start := time.Now()
		ww := &responseWriter{ResponseWriter: w, status: http.StatusOK}

		next.ServeHTTP(ww, r)

		level := zerolog.InfoLevel
		if ww.status >= 500 {
			level = zerolog.ErrorLevel
		} else if ww.status >= 400 {
			level = zerolog.WarnLevel
		}

		log.WithLevel(level).
			Str("method", r.Method).
			Str("path", r.URL.Path).
			Int("status", ww.status).
			Dur("duration", time.Since(start)).
			Str("ip", r.RemoteAddr).
			Msg("")
	})
}

type responseWriter struct {
	http.ResponseWriter
	status int
}

func (rw *responseWriter) WriteHeader(status int) {
	rw.status = status
	rw.ResponseWriter.WriteHeader(status)
}