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)

<-quitSemaphore

}

func onMessageRecived(conn *net.TCPConn) {
reader := bufio.NewReader(conn)
for {
msg, err := reader.ReadString('\n')
fmt.Println(msg)
if err != nil {
quitSemaphore <- true
break
}
time.Sleep(time.Second)
b := []byte(msg)
conn.Write(b)
}
}