frp/models/plugin/http2https.go

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// Copyright 2019 fatedier, fatedier@gmail.com
//
// 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 plugin
import (
"crypto/tls"
"fmt"
"io"
"net"
"net/http"
"net/http/httputil"
"strings"
frpNet "github.com/fatedier/frp/utils/net"
)
const PluginHTTP2HTTPS = "http2https"
func init() {
Register(PluginHTTP2HTTPS, NewHTTP2HTTPSPlugin)
}
type HTTP2HTTPSPlugin struct {
hostHeaderRewrite string
localAddr string
headers map[string]string
l *Listener
s *http.Server
}
func NewHTTP2HTTPSPlugin(params map[string]string) (Plugin, error) {
localAddr := params["plugin_local_addr"]
hostHeaderRewrite := params["plugin_host_header_rewrite"]
headers := make(map[string]string)
for k, v := range params {
if !strings.HasPrefix(k, "plugin_header_") {
continue
}
if k = strings.TrimPrefix(k, "plugin_header_"); k != "" {
headers[k] = v
}
}
if localAddr == "" {
return nil, fmt.Errorf("plugin_local_addr is required")
}
listener := NewProxyListener()
p := &HTTPS2HTTPPlugin{
localAddr: localAddr,
hostHeaderRewrite: hostHeaderRewrite,
headers: headers,
l: listener,
}
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
rp := &httputil.ReverseProxy{
Director: func(req *http.Request) {
req.URL.Scheme = "https"
req.URL.Host = p.localAddr
if p.hostHeaderRewrite != "" {
req.Host = p.hostHeaderRewrite
}
for k, v := range p.headers {
req.Header.Set(k, v)
}
},
Transport: tr,
}
p.s = &http.Server{
Handler: rp,
}
go p.s.Serve(listener)
return p, nil
}
func (p *HTTP2HTTPSPlugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, extraBufToLocal []byte) {
wrapConn := frpNet.WrapReadWriteCloserToConn(conn, realConn)
p.l.PutConn(wrapConn)
}
func (p *HTTP2HTTPSPlugin) Name() string {
return PluginHTTP2HTTPS
}
func (p *HTTP2HTTPSPlugin) Close() error {
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if err := p.s.Close();err != nil {
return err
}
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return nil
}