68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
// Copyright 2020 guylewin, guy@lewin.co.il
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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 vhost
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import (
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"bufio"
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"fmt"
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"io"
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"net"
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"net/http"
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"time"
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)
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type TcpHttpTunnelMuxer struct {
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*VhostMuxer
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}
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func NewTcpHttpTunnelMuxer(listener net.Listener, timeout time.Duration) (*TcpHttpTunnelMuxer, error) {
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mux, err := NewVhostMuxer(listener, getHostFromHttpConnect, nil, sendHttpOk, timeout)
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return &TcpHttpTunnelMuxer{mux}, err
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}
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func readHttpConnectRequest(rd io.Reader) (host string, err error) {
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bufioReader := bufio.NewReader(rd)
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req, err := http.ReadRequest(bufioReader)
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if err != nil {
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return
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}
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if req.Method != "CONNECT" {
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err = fmt.Errorf("connections to tcp vhost must be of method CONNECT")
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return
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}
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host = getHostFromAddr(req.Host)
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return
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}
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func sendHttpOk(c net.Conn, _ string) (_ net.Conn, err error) {
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okResp := okResponse()
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err = okResp.Write(c)
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return c, err
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}
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func getHostFromHttpConnect(c net.Conn) (_ net.Conn, _ map[string]string, err error) {
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reqInfoMap := make(map[string]string, 0)
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host, err := readHttpConnectRequest(c)
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if err != nil {
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return nil, reqInfoMap, err
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}
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reqInfoMap["Host"] = host
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reqInfoMap["Scheme"] = "tcp"
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return c, reqInfoMap, nil
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}
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