GO socket编程

服务端

package main

import (
	"fmt"
	"log"
	"net"
	"time"
)

type Server struct{}

func NewServer() *Server {
	return &Server{}
}

var DafaultServer = NewServer()

func (s *Server) Accept(lis net.Listener) {
	for {
		conn, err := lis.Accept()
		if err != nil {
			log.Println("server : accept error:", err)
			return
		}
		go s.Hanlder(conn)
	}
}

func Accept(lis net.Listener) {
	DafaultServer.Accept(lis)
}
func (s *Server) Hanlder(conn net.Conn) {
	defer func() {
		conn.Close()
	}()
	for {
		buf := make([]byte, 1024)
		log.Printf("服务端在等待客户端%s 发送信息\n ", conn.RemoteAddr().String())
		n, err := conn.Read(buf)
		if err != nil {
			fmt.Println("客户端断开链接")
			return
		}
		log.Println(string(buf[:n]), "time ", time.Now().String())
	}
}

func main() {
	//addr, _ := net.ResolveTCPAddr("tcp", ":999")
	l, err := net.Listen("tcp", ":999")
	if err != nil {
		log.Fatalln("network error:", err)
	}
	log.Println("start server on", l.Addr())
	Accept(l)
}

客户端

package main

import (
	"bufio"
	"fmt"
	"log"
	"net"
	"os"
	"strings"
)

func main() {

	conn, err := net.Dial("tcp", "127.0.0.1:999")
	defer func() {
		conn.Close()
	}()
	if err != nil {
		log.Fatal("client dial err = ", err)
		return
	}
	reader := bufio.NewReader(os.Stdin)
	for {
		line, err := reader.ReadString('\n')
		if err != nil {
			fmt.Println("readString err= ", err)
		}
		line = strings.Trim(line, "\r\n")
		if line == "exit" {
			log.Println("客户端退出")
			break
		}
		_, err = conn.Write([]byte(line))
		if err != nil {
			log.Println("conn err")
			break
		}
		log.Println("客户端发送", line)
	}

}