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115 lines
2.7 KiB
115 lines
2.7 KiB
// Copyright 2019 fatedier, fatedier@gmail.com
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package plugin
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import (
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"crypto/tls"
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"fmt"
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"io"
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"net/http"
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"net/http/httputil"
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frpNet "github.com/fatedier/frp/utils/net"
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)
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const PluginHTTPS2HTTP = "https2http"
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func init() {
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Register(PluginHTTPS2HTTP, NewHTTPS2HTTPPlugin)
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}
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type HTTPS2HTTPPlugin struct {
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crtPath string
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keyPath string
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hostHeaderRewrite string
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localAddr string
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l *Listener
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s *http.Server
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}
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func NewHTTPS2HTTPPlugin(params map[string]string) (Plugin, error) {
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crtPath := params["plugin_crt_path"]
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keyPath := params["plugin_key_path"]
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localAddr := params["plugin_local_addr"]
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hostHeaderRewrite := params["plugin_host_header_rewrite"]
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if crtPath == "" {
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return nil, fmt.Errorf("plugin_crt_path is required")
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}
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if keyPath == "" {
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return nil, fmt.Errorf("plugin_key_path is required")
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}
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if localAddr == "" {
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return nil, fmt.Errorf("plugin_local_addr is required")
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}
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listener := NewProxyListener()
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p := &HTTPS2HTTPPlugin{
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crtPath: crtPath,
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keyPath: keyPath,
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localAddr: localAddr,
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hostHeaderRewrite: hostHeaderRewrite,
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l: listener,
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}
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rp := &httputil.ReverseProxy{
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Director: func(req *http.Request) {
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req.URL.Scheme = "http"
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req.URL.Host = p.localAddr
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if p.hostHeaderRewrite != "" {
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req.Host = p.hostHeaderRewrite
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}
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},
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}
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p.s = &http.Server{
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Handler: rp,
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}
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tlsConfig, err := p.genTLSConfig()
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if err != nil {
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return nil, fmt.Errorf("gen TLS config error: %v", err)
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}
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ln := tls.NewListener(listener, tlsConfig)
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go p.s.Serve(ln)
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return p, nil
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}
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func (p *HTTPS2HTTPPlugin) genTLSConfig() (*tls.Config, error) {
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cert, err := tls.LoadX509KeyPair(p.crtPath, p.keyPath)
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if err != nil {
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return nil, err
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}
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config := &tls.Config{Certificates: []tls.Certificate{cert}}
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return config, nil
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}
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func (p *HTTPS2HTTPPlugin) Handle(conn io.ReadWriteCloser, realConn frpNet.Conn, extraBufToLocal []byte) {
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wrapConn := frpNet.WrapReadWriteCloserToConn(conn, realConn)
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p.l.PutConn(wrapConn)
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}
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func (p *HTTPS2HTTPPlugin) Name() string {
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return PluginHTTPS2HTTP
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}
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func (p *HTTPS2HTTPPlugin) Close() error {
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return nil
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}
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