golang 并行转串行透明代理

放在这里做个备份

package main
import (
	"fmt"
	"log"
	"net"
)
const (
	realServer = "127.0.0.1:9002"
	selfPort = 9010
)
type gameConn struct {
	ClientConn net.Conn
	PkgBuf [maxPkgSize]byte
	PkgLen int
	Channel chan int
}
var gbChannel chan int
var connMap map[int](*gameConn)
func main() {
	// Listen on TCP port 2000 on all interfaces.
	ip := net.ParseIP("0.0.0.0")
	addr := net.TCPAddr{ip, selfPort}
	l, err := net.ListenTCP("tcp", &addr)
	if err != nil {
		log.Fatal(err)
	}
	serverConn, err := net.Dial("tcp", realServer)
	if err != nil {
		fmt.Println(err)
		return
	}
	log.Printf("starting server...")
	gbChannel = make(chan int)
	connMap = make(map[int](*gameConn))
	index := 0
	go redisProcess(serverConn)
	for {
		// Wait for a connection.
		conn, err := l.AcceptTCP()
		if err != nil {
			log.Fatal(err)
		}
		go start(conn, index)
		index++
	}
}

package main
import (
	"fmt"
	"net"
)
const (
	maxPkgSize = (4 * 1024 * 1024)
)
func start(netConn net.Conn, id int) {
	connInfo := new(gameConn)
	connInfo.ClientConn = netConn
	connInfo.Channel = make(chan int)
	connMap[id] = connInfo
	var err error
	connInfo.PkgLen, err = netConn.Read(connInfo.PkgBuf[:])
	if err != nil {
		fmt.Println(err)
		return
	} else if connInfo.PkgLen >= maxPkgSize {
		fmt.Printf("too long:%i\n", connInfo.PkgLen)
	} else {
		//		fmt.Printf("length:%i\n", length)
	}
	gbChannel <- id
	for {
		<-connInfo.Channel
		connInfo.PkgLen, err = netConn.Read(connInfo.PkgBuf[:])
		if err != nil {
			fmt.Println(err)
			return
		} else if connInfo.PkgLen >= maxPkgSize {
			fmt.Printf("too long:%i\n", connInfo.PkgLen)
		} else {
			//			fmt.Printf("length:%i\n", length)
		}
		gbChannel <- id
	}
}
func redisProcess(serverConn net.Conn) {
	var pGameConn *gameConn
	var id int
	for {
		id = <-gbChannel
		pGameConn = connMap[id]
		if pGameConn == nil {
			continue
		}
		length, err := serverConn.Write(pGameConn.PkgBuf[:pGameConn.PkgLen])
		if err != nil {
			fmt.Println(err)
			continue
		}
		length, err = serverConn.Read(pGameConn.PkgBuf[:])
		if err != nil {
			fmt.Println(err)
			continue
		} else if length >= maxPkgSize {
			fmt.Printf("too long:%i\n", length)
		} else {
			//		fmt.Printf("length:%i\n", length)
		}
		length, err = pGameConn.ClientConn.Write(pGameConn.PkgBuf[:length])
		if err != nil {
			fmt.Println(err)
			continue
		}
		pGameConn.Channel <- 1
	}
}

本文来自:CSDN博客

感谢作者:xtxy

查看原文:golang 并行转串行透明代理

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