golang学习笔记之UDP:server端与client端

最新推荐文章于 2025-05-06 22:15:47 发布

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最新推荐文章于 2025-05-06 22:15:47 发布

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CC 4.0 BY-SA版权

文章标签：网络 golang

原文链接：http://www.cnblogs.com/yin5th/p/9274518.html

本文提供了一个简单的UDP通信实例，包括服务器端和客户端的Go语言实现。服务器监听9090端口接收消息并回应，客户端则发送消息并接收服务器反馈。

server端

main.go

package main

import (
	"fmt"
	"net"
)

func main() {
	listen, err := net.ListenUDP("udp", &net.UDPAddr{
		IP:   net.IPv4(0, 0, 0, 0),
		Port: 9090,
	})

	if err != nil {
		fmt.Printf("listen failed, err:%v\n", err)
		return
	}

	for {
		var data [1024]byte
		n, addr, err := listen.ReadFromUDP(data[:])
		if err != nil {
			fmt.Printf("read failed from addr: %v, err: %v\n", addr, err)
			break
		}

		fmt.Printf("addr: %v data: %v  count: %v\n", addr, string(data[:n]), n)

		_, err = listen.WriteToUDP([]byte("received success!"), addr)
		if err != nil {
			fmt.Printf("write failed, err: %v\n", err)
			continue
		}
	}
}

client端

main.go

package main

import (
	"fmt"
	"net"
)

func main() {
	//connect server
	conn, err := net.DialUDP("udp", nil, &net.UDPAddr{
		IP:   net.IPv4(127, 0, 0, 1),
		Port: 9090,
	})

	if err != nil {
		fmt.Printf("connect failed, err: %v\n", err)
		return
	}

	//send data
	_, err = conn.Write([]byte("hello server!"))
	if err != nil {
		fmt.Printf("send data failed, err : %v\n", err)
		return
	}

	//receive data from server
	result := make([]byte, 4096)
	n, remoteAddr, err := conn.ReadFromUDP(result)
	if err != nil {
		fmt.Printf("receive data failed, err: %v\n", err)
		return
	}
	fmt.Printf("receive from addr: %v  data: %v\n", remoteAddr, string(result[:n]))
}

分别编译执行server端和client端

转载于:https://www.cnblogs.com/yin5th/p/9274518.html