refactor: separate API handlers into dedicated packages with improved HTTP utilities (#5127)

pkg/util/http/middleware.go

@@ -0,0 +1,40 @@
+// Copyright 2025 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package http
+
+import (
+	"net/http"
+
+	"github.com/fatedier/frp/pkg/util/log"
+)
+
+type responseWriter struct {
+	http.ResponseWriter
+	code int
+}
+
+func (rw *responseWriter) WriteHeader(code int) {
+	rw.code = code
+	rw.ResponseWriter.WriteHeader(code)
+}
+
+func NewRequestLogger(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		log.Infof("http request: [%s]", r.URL.Path)
+		rw := &responseWriter{ResponseWriter: w, code: http.StatusOK}
+		next.ServeHTTP(rw, r)
+		log.Infof("http response [%s]: code [%d]", r.URL.Path, rw.code)
+	})
+}