Done

backend/middleware/audit.go

@@ -0,0 +1,21 @@
+package middleware
+
+import (
+	"log"
+	"net/http"
+	"time"
+)
+
+// 审计日志中间件
+func AuditLog(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+		next.ServeHTTP(w, r)
+		log.Printf(
+			"Method=%s Path=%s Duration=%s",
+			r.Method,
+			r.URL.Path,
+			time.Since(start),
+		)
+	})
+}