Golang網絡編程-Socket

Socket程序示例1

Server

package main

import (
	"io"
	"log"
	"net"
	"time"
)

func main() {
	listener, err := net.Listen("tcp", "localhost:8000")
	if err != nil {
		log.Fatal(err)
	}
	for {
		conn, err := listener.Accept()
		if err != nil {
			log.Print(err)
			continue
		}
		go handleConn(conn)
	}
}

func handleConn(c net.Conn) {
	defer c.Close()
	for {
		_, err := io.WriteString(c, "hello... \n")
		if err != nil {
			return
		}
		time.Sleep(1 * time.Second)
	}
}

Client

package main

import (
	"io"
	"log"
	"net"
	"os"
)

func main() {
	conn, err := net.Dial("tcp", "localhost:8000")
	if err != nil {
		log.Fatal(err)
	}
	defer conn.Close()
	supposedCopy(os.Stdout, conn)
}

func supposedCopy(dst io.Writer, src io.Reader) {
	if _, err := io.Copy(dst, src); err != nil {
		log.Fatal(err)
	}
}

程序運行

控制檯分別運行命令

go run tryTimeServer.go

go run tryTimeClient.go

運行效果

運行效果如下圖所示

Socket程序示例2

tryTimeServer.go

package main

import (
	"io"
	"log"
	"net"
	"time"
)

func main() {
	listener, err := net.Listen("tcp", "localhost:8000")
	if err != nil {
		log.Fatal(err)
	}
	for {
		conn, err := listener.Accept()
		if err != nil {
			log.Print(err)
			continue
		}
		go handleConn(conn)
	}
}

func handleConn(c net.Conn) {
	defer c.Close()
	for {
		_, err := io.WriteString(c, time.Now().Format("2006/01/02 15:04:05\r\n"))
		//_, err1 := io.WriteString(c, timestr + "hello... \n")
		if err != nil {
			return
		}
		time.Sleep(1 * time.Second)
	}
}

tryTimeClient.go

package main

import (
	"io"
	"log"
	"net"
	"os"
)

func main() {
	conn, err := net.Dial("tcp", "localhost:8000")
	if err != nil {
		log.Fatal(err)
	}
	defer conn.Close()
	supposedCopy(os.Stdout, conn)
}

func supposedCopy(dst io.Writer, src io.Reader) {
	if _, err := io.Copy(dst, src); err != nil {
		log.Fatal(err)
	}
}

運行效果