frp/pkg/util/http/handler.go

67 lines
1.7 KiB
Go

// 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 (
"encoding/json"
"net/http"
"github.com/fatedier/frp/pkg/util/log"
)
type GeneralResponse struct {
Code int
Msg string
}
// APIHandler is a handler function that returns a response object or an error.
type APIHandler func(ctx *Context) (any, error)
// MakeHTTPHandlerFunc turns a normal APIHandler into a http.HandlerFunc.
func MakeHTTPHandlerFunc(handler APIHandler) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
ctx := NewContext(w, r)
res, err := handler(ctx)
if err != nil {
log.Warnf("http response [%s]: error: %v", r.URL.Path, err)
code := http.StatusInternalServerError
if e, ok := err.(*Error); ok {
code = e.Code
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(code)
_ = json.NewEncoder(w).Encode(GeneralResponse{Code: code, Msg: err.Error()})
return
}
if res == nil {
w.WriteHeader(http.StatusOK)
return
}
switch v := res.(type) {
case []byte:
_, _ = w.Write(v)
case string:
_, _ = w.Write([]byte(v))
default:
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
_ = json.NewEncoder(w).Encode(v)
}
}
}