fc8b22dd7c
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61 lines
1.2 KiB
Go
61 lines
1.2 KiB
Go
package main
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import (
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"log"
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"net/http"
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"time"
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)
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// Wir bauen unseren eigenen ResponseWriter, der den Status-Code "mitschreibt"
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type StatusRecorder struct {
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http.ResponseWriter
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Status int
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}
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// Überschreiben der WriteHeader Methode, um den Code abzufangen
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func (r *StatusRecorder) WriteHeader(status int) {
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r.Status = status
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r.ResponseWriter.WriteHeader(status)
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}
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// Die eigentliche Middleware Funktion
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func Logger(next http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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// 1. Startzeit messen
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start := time.Now()
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// 2. Recorder initialisieren (Standard ist 200 OK)
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recorder := &StatusRecorder{
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ResponseWriter: w,
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Status: http.StatusOK,
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}
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// 3. Den echten Handler aufrufen (mit unserem Recorder)
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next(recorder, r)
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// 4. Dauer berechnen
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duration := time.Since(start)
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// 5. Loggen
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// Format: [METHODE] PFAD | STATUS | DAUER | IP
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// Beispiel: [POST] /api/validate | 200 | 1.2ms | 127.0.0.1
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icon := "✅"
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if recorder.Status >= 400 {
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icon = "⚠️"
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}
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if recorder.Status >= 500 {
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icon = "🔥"
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}
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log.Printf("%s [%s] %s | %d | %v | %s",
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icon,
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r.Method,
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r.URL.Path,
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recorder.Status,
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duration,
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r.RemoteAddr,
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)
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}
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}
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