mirror of https://github.com/fatedier/frp
support multilevel subdomain, fix #1132
fatedier
6 years ago
parent
6b61cb3742
commit
9be24db410
@ -1,235 +0,0 @@
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// Copyright 2016 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 vhost
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import (
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"bufio"
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"bytes"
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"encoding/base64"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"strings"
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"time"
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frpNet "github.com/fatedier/frp/utils/net"
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gnet "github.com/fatedier/golib/net"
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"github.com/fatedier/golib/pool"
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)
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type HttpMuxer struct {
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*VhostMuxer
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}
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func GetHttpRequestInfo(c frpNet.Conn) (_ frpNet.Conn, _ map[string]string, err error) {
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reqInfoMap := make(map[string]string, 0)
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sc, rd := gnet.NewSharedConn(c)
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request, err := http.ReadRequest(bufio.NewReader(rd))
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if err != nil {
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return nil, reqInfoMap, err
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}
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// hostName
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tmpArr := strings.Split(request.Host, ":")
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reqInfoMap["Host"] = tmpArr[0]
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reqInfoMap["Path"] = request.URL.Path
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reqInfoMap["Scheme"] = request.URL.Scheme
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// Authorization
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authStr := request.Header.Get("Authorization")
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if authStr != "" {
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reqInfoMap["Authorization"] = authStr
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}
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request.Body.Close()
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return frpNet.WrapConn(sc), reqInfoMap, nil
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}
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func NewHttpMuxer(listener frpNet.Listener, timeout time.Duration) (*HttpMuxer, error) {
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mux, err := NewVhostMuxer(listener, GetHttpRequestInfo, HttpAuthFunc, ModifyHttpRequest, timeout)
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return &HttpMuxer{mux}, err
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}
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func ModifyHttpRequest(c frpNet.Conn, rewriteHost string) (_ frpNet.Conn, err error) {
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sc, rd := gnet.NewSharedConn(c)
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var buff []byte
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remoteIP := strings.Split(c.RemoteAddr().String(), ":")[0]
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if buff, err = hostNameRewrite(rd, rewriteHost, remoteIP); err != nil {
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return nil, err
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}
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err = sc.ResetBuf(buff)
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return frpNet.WrapConn(sc), err
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}
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func hostNameRewrite(request io.Reader, rewriteHost string, remoteIP string) (_ []byte, err error) {
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buf := pool.GetBuf(1024)
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defer pool.PutBuf(buf)
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var n int
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n, err = request.Read(buf)
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if err != nil {
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return
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}
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retBuffer, err := parseRequest(buf[:n], rewriteHost, remoteIP)
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return retBuffer, err
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}
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func parseRequest(org []byte, rewriteHost string, remoteIP string) (ret []byte, err error) {
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tp := bytes.NewBuffer(org)
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// First line: GET /index.html HTTP/1.0
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var b []byte
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if b, err = tp.ReadBytes('\n'); err != nil {
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return nil, err
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}
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req := new(http.Request)
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// we invoked ReadRequest in GetHttpHostname before, so we ignore error
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req.Method, req.RequestURI, req.Proto, _ = parseRequestLine(string(b))
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rawurl := req.RequestURI
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// CONNECT www.google.com:443 HTTP/1.1
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justAuthority := req.Method == "CONNECT" && !strings.HasPrefix(rawurl, "/")
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if justAuthority {
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rawurl = "http://" + rawurl
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}
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req.URL, _ = url.ParseRequestURI(rawurl)
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if justAuthority {
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// Strip the bogus "http://" back off.
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req.URL.Scheme = ""
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}
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// RFC2616: first case
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// GET /index.html HTTP/1.1
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// Host: www.google.com
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if req.URL.Host == "" {
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var changedBuf []byte
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if rewriteHost != "" {
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changedBuf, err = changeHostName(tp, rewriteHost)
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}
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buf := new(bytes.Buffer)
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buf.Write(b)
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buf.WriteString(fmt.Sprintf("X-Forwarded-For: %s\r\n", remoteIP))
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buf.WriteString(fmt.Sprintf("X-Real-IP: %s\r\n", remoteIP))
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if len(changedBuf) == 0 {
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tp.WriteTo(buf)
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} else {
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buf.Write(changedBuf)
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}
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return buf.Bytes(), err
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}
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// RFC2616: second case
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// GET http://www.google.com/index.html HTTP/1.1
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// Host: doesntmatter
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// In this case, any Host line is ignored.
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if rewriteHost != "" {
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hostPort := strings.Split(req.URL.Host, ":")
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if len(hostPort) == 1 {
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req.URL.Host = rewriteHost
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} else if len(hostPort) == 2 {
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req.URL.Host = fmt.Sprintf("%s:%s", rewriteHost, hostPort[1])
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}
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}
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firstLine := req.Method + " " + req.URL.String() + " " + req.Proto
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buf := new(bytes.Buffer)
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buf.WriteString(firstLine)
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buf.WriteString(fmt.Sprintf("X-Forwarded-For: %s\r\n", remoteIP))
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buf.WriteString(fmt.Sprintf("X-Real-IP: %s\r\n", remoteIP))
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tp.WriteTo(buf)
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return buf.Bytes(), err
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}
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// parseRequestLine parses "GET /foo HTTP/1.1" into its three parts.
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func parseRequestLine(line string) (method, requestURI, proto string, ok bool) {
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s1 := strings.Index(line, " ")
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s2 := strings.Index(line[s1+1:], " ")
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if s1 < 0 || s2 < 0 {
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return
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}
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s2 += s1 + 1
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return line[:s1], line[s1+1 : s2], line[s2+1:], true
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}
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func changeHostName(buff *bytes.Buffer, rewriteHost string) (_ []byte, err error) {
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retBuf := new(bytes.Buffer)
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peek := buff.Bytes()
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for len(peek) > 0 {
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i := bytes.IndexByte(peek, '\n')
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if i < 3 {
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// Not present (-1) or found within the next few bytes,
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// implying we're at the end ("\r\n\r\n" or "\n\n")
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return nil, err
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}
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kv := peek[:i]
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j := bytes.IndexByte(kv, ':')
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if j < 0 {
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return nil, fmt.Errorf("malformed MIME header line: " + string(kv))
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}
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if strings.Contains(strings.ToLower(string(kv[:j])), "host") {
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var hostHeader string
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portPos := bytes.IndexByte(kv[j+1:], ':')
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if portPos == -1 {
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hostHeader = fmt.Sprintf("Host: %s\r\n", rewriteHost)
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} else {
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hostHeader = fmt.Sprintf("Host: %s:%s\r\n", rewriteHost, kv[j+portPos+2:])
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}
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retBuf.WriteString(hostHeader)
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peek = peek[i+1:]
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break
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} else {
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retBuf.Write(peek[:i])
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retBuf.WriteByte('\n')
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}
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peek = peek[i+1:]
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}
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retBuf.Write(peek)
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return retBuf.Bytes(), err
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}
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func HttpAuthFunc(c frpNet.Conn, userName, passWord, authorization string) (bAccess bool, err error) {
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s := strings.SplitN(authorization, " ", 2)
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if len(s) != 2 {
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res := noAuthResponse()
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res.Write(c)
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return
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}
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b, err := base64.StdEncoding.DecodeString(s[1])
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if err != nil {
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return
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}
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pair := strings.SplitN(string(b), ":", 2)
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if len(pair) != 2 {
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return
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}
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if pair[0] != userName || pair[1] != passWord {
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return
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}
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return true, nil
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}
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func noAuthResponse() *http.Response {
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header := make(map[string][]string)
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header["WWW-Authenticate"] = []string{`Basic realm="Restricted"`}
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res := &http.Response{
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Status: "401 Not authorized",
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StatusCode: 401,
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Proto: "HTTP/1.1",
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ProtoMajor: 1,
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ProtoMinor: 1,
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Header: header,
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}
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return res
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}
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