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Shermie-Proxy

Function

• Support http, https, ws, wss, tcp, socket5 protocol data receiving and sending, only need to monitor one port
• Support data interception and custom modification
• Automatically identify inbound protocols, and process them according to different protocols identified by message headers
• Support adding upper-level tcp proxy, only first-level

TODO：

• tcp connection multiplexing

How to use

• Install

go get github.com/kxg3030/shermie-proxy

• Listen

package main

import (
	"bufio"
	"compress/gzip"
	"flag"
	"github.com/kxg3030/shermie-proxy/Core"
	"github.com/kxg3030/shermie-proxy/Core/Websocket"
	"github.com/kxg3030/shermie-proxy/Log"
	"io"
	"net/http"
	"strings"
)

func init() {
	Log.NewLogger().Init()
	// Initialize the root certificate
	err := Core.NewCertificate().Init()
	if err != nil {
		return
	}
}

func main() {
	port  := flag.String("port", "9090", "listen port")
	nagle := flag.Bool("nagle", true, "connect remote use nagle algorithm")
	proxy := flag.String("proxy", "", "prxoy remote host")
	to    := flag.String("to", "", "tcp remote host")
	flag.Parse()
	if *port == "0" {
		Log.Log.Fatal("port required")
		return
	}
	// start service
	s := Core.NewProxyServer(*port, *nagle, *proxy, *to)
	
	// Register tcp connection event
	s.OnTcpConnectEvent = func(conn net.Conn) {

	}
	// Register tcp close event
	s.OnTcpCloseEvent = func(conn net.Conn) {

	}
	
	s.OnHttpRequestEvent = func(message []byte, request *http.Request, resolve Core.ResolveHttpRequest, conn net.Conn) bool {
		Log.Log.Println("HttpRequestEvent：" + conn.RemoteAddr().String())
		// Data modification can be done here
		resolve(message, request)
		// If normal processing must return true, if there is no need to return data to the client, return false, which is generally used when operating conn by yourself
		return true
	}
	
	s.OnHttpResponseEvent = func(body []byte, response *http.Response, resolve Core.ResolveHttpResponse, conn net.Conn) bool {
		mimeType := response.Header.Get("Content-Type")
		if strings.Contains(mimeType, "json") {
			Log.Log.Println("HttpResponseEvent：" + string(body))
		}
		// Data modification can be done here
		resolve(body, response)
		// If normal processing must return true, if there is no need to return data to the client, return false, which is generally used when operating conn by yourself
		return true
	}


	s.OnSocks5ResponseEvent = func(message []byte, resolve Core.ResolveSocks5, conn net.Conn) (int, error) {
		Log.Log.Println("Socks5ResponseEvent：" + string(message))
		// Data modification can be done here
		return resolve(message)
	}


	s.OnSocks5RequestEvent = func(message []byte, resolve Core.ResolveSocks5, conn net.Conn) (int, error) {
		Log.Log.Println("Socks5RequestEvent：" + string(message))
		// Data modification can be done here
		return resolve(message)
	}


	s.OnWsRequestEvent = func(msgType int, message []byte, resolve Core.ResolveWs, conn net.Conn) error {
		Log.Log.Println("WsRequestEvent：" + string(message))
		// Data modification can be done here
		return resolve(msgType, message)
	}


	s.OnWsResponseEvent = func(msgType int, message []byte, resolve Core.ResolveWs, conn net.Conn) error {
		Log.Log.Println("WsResponseEvent：" + string(message))
		// Data modification can be done here
		return resolve(msgType, message)
	}


	s.OnTcpClientStreamEvent = func(message []byte, resolve Core.ResolveTcp, conn net.Conn) (int, error) {
		Log.Log.Println("TcpClientStreamEvent：" + string(message))
		// Data modification can be done here
		return resolve(message)
	}


	s.OnTcpServerStreamEvent = func(message []byte, resolve Core.ResolveTcp, conn net.Conn) (int, error) {
		Log.Log.Println("TcpServerStreamEvent：" + string(message))
		// Data modification can be done here
		return resolve(message)
	}

	_ = s.Start()
}

• parameter

  --port: the port that the proxy service listens to, default is 9090

  --to: when proxying tcp service, the ip and port of the destination server, the default is 0, only used by tcp proxy

  --proxy: upper-level tcp proxy

  --nagle: whether to enable the nagle data merging algorithm, default is true