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// Copyright 2024 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.
//go:build !frps
package plugin
import (
"context"
"io"
stdlog "log"
"net"
"net/http"
"net/http/httputil"
"github.com/fatedier/golib/pool"
v1 "github.com/fatedier/frp/pkg/config/v1"
"github.com/fatedier/frp/pkg/util/log"
netpkg "github.com/fatedier/frp/pkg/util/net"
)
func init() {
Register(v1.PluginHTTP2HTTP, NewHTTP2HTTPPlugin)
}
type HTTP2HTTPPlugin struct {
opts *v1.HTTP2HTTPPluginOptions
l *Listener
s *http.Server
}
func NewHTTP2HTTPPlugin(options v1.ClientPluginOptions) (Plugin, error) {
opts := options.(*v1.HTTP2HTTPPluginOptions)
listener := NewProxyListener()
p := &HTTP2HTTPPlugin{
opts: opts,
l: listener,
}
rp := &httputil.ReverseProxy{
Rewrite: func(r *httputil.ProxyRequest) {
req := r.Out
req.URL.Scheme = "http"
req.URL.Host = p.opts.LocalAddr
if p.opts.HostHeaderRewrite != "" {
req.Host = p.opts.HostHeaderRewrite
}
for k, v := range p.opts.RequestHeaders.Set {
req.Header.Set(k, v)
}
},
BufferPool: pool.NewBuffer(32 * 1024),
ErrorLog: stdlog.New(log.NewWriteLogger(log.WarnLevel, 2), "", 0),
}
p.s = &http.Server{
Handler: rp,
ReadHeaderTimeout: 0,
}
go func() {
_ = p.s.Serve(listener)
}()
return p, nil
}
func (p *HTTP2HTTPPlugin) Handle(_ context.Context, conn io.ReadWriteCloser, realConn net.Conn, _ *ExtraInfo) {
wrapConn := netpkg.WrapReadWriteCloserToConn(conn, realConn)
_ = p.l.PutConn(wrapConn)
}
func (p *HTTP2HTTPPlugin) Name() string {
return v1.PluginHTTP2HTTP
}
func (p *HTTP2HTTPPlugin) Close() error {
return p.s.Close()
}