package http import ( "log" "net/http" "strings" "time" "github.com/Luzifer/go_helpers/accessLogger" ) type HTTPLogHandler struct { Handler http.Handler TrustedIPHeaders []string } func NewHTTPLogHandler(h http.Handler) http.Handler { return HTTPLogHandler{ Handler: h, TrustedIPHeaders: []string{"X-Forwarded-For", "RemoteAddr", "X-Real-IP"}, } } func (l HTTPLogHandler) ServeHTTP(res http.ResponseWriter, r *http.Request) { start := time.Now() ares := accessLogger.New(res) l.Handler.ServeHTTP(ares, r) log.Printf("%s - \"%s %s\" %d %d \"%s\" \"%s\" %s", l.findIP(r), r.Method, r.URL.Path, ares.StatusCode, ares.Size, r.Header.Get("Referer"), r.Header.Get("User-Agent"), time.Since(start), ) } func (l HTTPLogHandler) findIP(r *http.Request) string { remoteAddr := strings.SplitN(r.RemoteAddr, ":", 2)[0] for _, hdr := range l.TrustedIPHeaders { if value := r.Header.Get(hdr); value != "" { return strings.SplitN(value, ",", 2)[0] } } return remoteAddr }