go语言 tcp服务器,go语言实现 tcp客户端/服务端

/server.go/

package main

import (

"bufio"

"fmt"

"net"

"time"

)

func main() {

var tcpAddr *net.TCPAddr

tcpAddr, _ = net.ResolveTCPAddr("tcp", "127.0.0.1:9999")

tcpListener, _ := net.ListenTCP("tcp", tcpAddr)

defer tcpListener.Close()

for {

tcpConn, err := tcpListener.AcceptTCP()

if err != nil {

continue

}

fmt.Println("A client connected : " + tcpConn.RemoteAddr().String())

go tcpPipe(tcpConn)

}

}

func tcpPipe(conn *net.TCPConn) {

ipStr := conn.RemoteAddr().String()

defer func() {

fmt.Println("disconnected :" + ipStr)

conn.Close()

}()

reader := bufio.NewReader(conn)

for {

message, err := reader.ReadString('\n')

if err != nil {

return

}

fmt.Println(string(message))

msg := time.Now().String() + "\n"

b := []byte(msg)

conn.Write(b)

}

}

/client.go/

package main

import (

"bufio"

"fmt"

"net"

"time"

)

var quitSemaphore chan bool

func main() {

var tcpAddr *net.TCPAddr

tcpAddr, _ = net.ResolveTCPAddr("tcp", "127.0.0.1:9999")

conn, _ := net.DialTCP("tcp", nil, tcpAddr)

defer conn.Close()

fmt.Println("connected!")

go onMessageRecived(conn)

b := []byte("time\n")

conn.Write(b)

}

func onMessageRecived(conn *net.TCPConn) {

reader := bufio.NewReader(conn)

for {

msg, err := reader.ReadString('\n')

fmt.Println(msg)

if err != nil {

quitSemaphore

break

}

time.Sleep(time.Second)

b := []byte(msg)

conn.Write(b)

}

}