新增http代理模式

client.go

@@ -103,6 +103,7 @@ func (s *TRPClient) dealChan() error {
 	//与目标建立连接
 	server, err := net.Dial("tcp", host)
 	if err != nil {
+		fmt.Println(err)
 		return err
 	}
 	//创建成功后io.copy

conn.go

@@ -7,6 +7,9 @@ import (
 	"fmt"
 	"io"
 	"net"
+	"net/url"
+	"regexp"
+	"strings"
 	"time"
 )
 
@@ -95,6 +98,38 @@ func (s *Conn) SetAlive() {
 	conn.SetKeepAlivePeriod(time.Duration(2 * time.Second))
 }
 
+//从tcp报文中解析出host
+func (s *Conn) GetHost() (method, address string, rb []byte, err error) {
+	var b [2048]byte
+	var n int
+	var host string
+	if n, err = s.Read(b[:]); err != nil {
+		return
+	}
+	rb = b[:n]
+	//TODO：某些不规范报文可能会有问题
+	fmt.Sscanf(string(b[:n]), "%s", &method)
+	reg, err := regexp.Compile(`(\w+:\/\/)([^/:]+)(:\d*)?`)
+	if err != nil {
+		return
+	}
+	host = string(reg.Find(b[:]))
+	hostPortURL, err := url.Parse(host)
+	if err != nil {
+		return
+	}
+	if hostPortURL.Opaque == "443" { //https访问
+		address = hostPortURL.Scheme + ":443"
+	} else { //http访问
+		if strings.Index(hostPortURL.Host, ":") == -1 { //host不带端口， 默认80
+			address = hostPortURL.Host + ":80"
+		} else {
+			address = hostPortURL.Host
+		}
+	}
+	return
+}
+
 func (s *Conn) Close() error {
 	return s.conn.Close()
 }

main.go

@@ -47,13 +47,14 @@ func main() {
 				log.Fatalln(err)
 			}
 		} else if *rpMode == "tunnelServer" {
-			svr := NewTunnelModeServer(*tcpPort, *httpPort, *tunnelTarget)
-			if err := svr.Start(); err != nil {
-				log.Fatalln(err)
-			}
+			svr := NewTunnelModeServer(*tcpPort, *httpPort, *tunnelTarget, ProcessTunnel)
+			svr.Start()
 		} else if *rpMode == "sock5Server" {
 			svr := NewSock5ModeServer(*tcpPort, *httpPort)
 			svr.Start()
+		} else if *rpMode == "httpProxyServer" {
+			svr := NewTunnelModeServer(*tcpPort, *httpPort, *tunnelTarget, ProcessHttp)
+			svr.Start()
 		}
 	}
 }

server.go

@@ -125,19 +125,22 @@ func (s *HttpModeServer) writeResponse(w http.ResponseWriter, c *Conn) error {
 	return nil
 }
 
+type process func(c *Conn, s *TunnelModeServer) error
 type TunnelModeServer struct {
 	Tunnel
 	httpPort     int
 	tunnelTarget string
+	process      process
 }
 
-func NewTunnelModeServer(tcpPort, httpPort int, tunnelTarget string) *TunnelModeServer {
+func NewTunnelModeServer(tcpPort, httpPort int, tunnelTarget string, process process) *TunnelModeServer {
 	s := new(TunnelModeServer)
 	s.tunnelPort = tcpPort
 	s.httpPort = httpPort
 	s.tunnelTarget = tunnelTarget
 	s.tunnelList = make(chan *Conn, 1000)
 	s.signalList = make(chan *Conn, 10)
+	s.process = process
 	return s
 }
 
@@ -164,21 +167,43 @@ func (s *TunnelModeServer) startTunnelServer() {
 			log.Println(err)
 			continue
 		}
-		go s.process(NewConn(conn))
+		go s.process(NewConn(conn), s)
 	}
 }
 
-//监听连接处理
-func (s *TunnelModeServer) process(c *Conn) error {
+//TODO：这种实现方式……
+//tcp隧道模式
+func ProcessTunnel(c *Conn, s *TunnelModeServer) error {
 retry:
-	if len(s.tunnelList) < 10 { //新建通道
-		go s.newChan()
-	}
-	link := <-s.tunnelList
+	link := s.GetTunnel()
 	if _, err := link.WriteHost(s.tunnelTarget); err != nil {
+		link.Close()
 		goto retry
 	}
 	go relay(link.conn, c.conn)
 	relay(c.conn, link.conn)
 	return nil
 }
+
+//http代理模式
+func ProcessHttp(c *Conn, s *TunnelModeServer) error {
+	method, addr, rb, err := c.GetHost()
+	if err != nil {
+		c.Close()
+		return err
+	}
+retry:
+	link := s.GetTunnel()
+	if _, err := link.WriteHost(addr); err != nil {
+		link.Close()
+		goto retry
+	}
+	if method == "CONNECT" {
+		fmt.Fprint(c, "HTTP/1.1 200 Connection established\r\n")
+	} else {
+		link.Write(rb)
+	}
+	go relay(link.conn, c.conn)
+	relay(c.conn, link.conn)
+	return nil
+}

tunnel.go

@@ -3,7 +3,6 @@ package main
 import (
 	"bytes"
 	"errors"
-	"fmt"
 	"log"
 	"net"
 	"sync"
@@ -91,8 +90,15 @@ retry:
 	connPass := <-s.signalList
 	_, err := connPass.conn.Write([]byte("chan"))
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		goto retry
 	}
 	s.signalList <- connPass
 }
+
+func (s *Tunnel) GetTunnel() *Conn {
+	if len(s.tunnelList) < 10 { //新建通道
+		go s.newChan()
+	}
+	return <-s.tunnelList
+}

util.go

@@ -8,7 +8,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"log"
 	"net"
 	"net/http"
 	"net/http/httputil"
@@ -21,15 +20,10 @@ var (
 	disabledRedirect = errors.New("disabled redirect.")
 )
 
-
-
-
 func BadRequest(w http.ResponseWriter) {
 	http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
 }
 
-
-
 //发送请求并转为bytes
 func GetEncodeResponse(req *http.Request) ([]byte, error) {
 	var respBytes []byte
@@ -52,7 +46,6 @@ func GetEncodeResponse(req *http.Request) ([]byte, error) {
 	return respBytes, nil
 }
 
-
 // 将request 的处理
 func EncodeRequest(r *http.Request) ([]byte, error) {
 	raw := bytes.NewBuffer([]byte{})
@@ -91,6 +84,7 @@ func DecodeRequest(data []byte) (*http.Request, error) {
 		scheme = "https"
 	}
 	req.URL, _ = url.Parse(fmt.Sprintf("%s://%s%s", scheme, req.Host, req.RequestURI))
+	fmt.Println(req.URL)
 	req.RequestURI = ""
 	return req, nil
 }
@@ -151,8 +145,6 @@ func replaceHost(resp []byte) []byte {
 }
 
 func relay(in, out net.Conn) {
-	if _, err := io.Copy(in, out); err != nil {
-		log.Println("copy error:", err)
-	}
-	in.Close() //
+	io.Copy(in, out);
+	in.Close()
 }