golang实现简单的socket(含简单微信聊天代码实现)

golang实现简单的socket

简单使用，直接上代码

服务端：

package main

import (
	"fmt"
	"net"
)

func main() {
	// 创建服务器地址
	addr, _ := net.ResolveTCPAddr("tcp4", "localhost:8089")
	// 创建监听器
	tcp, _ := net.ListenTCP("tcp4", addr)
	fmt.Println("启动")
	// 获取数据
	// 关闭连接
	for{
		accept, _ := tcp.Accept()
		go func(){
		bytes := make([]byte, 1024)
		n, _ := accept.Read(bytes)
		fmt.Println("获取到的数据为：" ,string(bytes[:n]))
		accept.Write(append([]byte("服务器返回来的消息:"), bytes[:n]...))
		accept.Close()
		}()
	}
}

客户端：

package main

import (
	"fmt"
	"net"
)

func main() {
	addr, _ := net.ResolveTCPAddr("tcp4", "localhost:8089")

	conn, _ := net.DialTCP("tcp4", nil, addr)
	conn.Write([]byte("客户端发送数据"))
	b:=make([]byte,1024)
	count, _ := conn.Read(b)
	fmt.Println("server:", string(b[:count]))
	conn.Close()

}

这个就是简单socket
下面是一个类似于微信聊天的服务，可以启动玩一玩
服务端

package main

import (
	"fmt"
	"net"
	"strings"
)

type User struct {
	UserName      string
	OtherUserName string
	Msg           string
	ServerMsg     string
}
var (
	userMap = make(map[string]net.Conn)
	user = new(User)
)
 func main(){
 	// 创建地址
 	addr,_:=net.ResolveTCPAddr("tcp4","localhost:8899")
 	// 创建监听器
 	tcp, _ := net.ListenTCP("tcp4", addr)
	 for {
	 	// 通过监听器创建连接对象
	 	conn,_:=tcp.Accept()
	 	go func() {
	 		for{
				// 读取数据
				b:=make([]byte,1024)
				// 获取连接
				n, _ := conn.Read(b)
				array := strings.Split(string(b[:n]), "-")
				user.UserName = array[0]
				user.OtherUserName = array[1]
				user.Msg = array[2]
				user.ServerMsg = array[3]
				userMap[user.UserName] = conn
				if v,ok:=userMap[user.OtherUserName];ok&&v!=nil{

					n, err := v.Write([]byte (fmt.Sprintf("%s-%s-%s-%s", user.UserName,user.OtherUserName,user.Msg,user.ServerMsg)))
					if n <= 0 || err != nil{
						delete(userMap,user.OtherUserName)
						// 关闭连接
						conn.Close()
						v.Close()
						fmt.Println("if....")
						break
					}
					fmt.Println("发送消息成功")
				}else {
					user.ServerMsg = "对方不在线"
					conn.Write([]byte (fmt.Sprintf("%s-%s-%s-%s", user.UserName,user.OtherUserName,user.Msg,user.ServerMsg)))
				}
			}

		}()

	 }

 }

客户端：

package main

import (
	"fmt"
	"net"
	"os"
	"strings"
	"sync"
)

type User struct {
	UserName      string
	OtherUserName string
	Msg           string
	ServerMsg     string
}

var (
	user = new(User)
	wg sync.WaitGroup
)
func main()  {
	wg.Add(1)
	fmt.Println("请输入账号")
	fmt.Scanln(&user.UserName)
	fmt.Println("请输入要给谁发送消息：")
	fmt.Scanln(&user.OtherUserName)
	addr, _ := net.ResolveTCPAddr("tcp4", "localhost:8899")
	conn, _ := net.DialTCP("tcp4", nil, addr)
	// sendMsg
	go func() {
		fmt.Println("请输入您要发送的消息： ")
		for{
			fmt.Scanln(&user.Msg)
			if user.Msg == "exit" {
				conn.Close()
				wg.Done()
				os.Exit(0)
			}
			conn.Write([]byte (fmt.Sprintf("%s-%s-%s-%s", user.UserName,user.OtherUserName,user.Msg,user.ServerMsg)))
		}
	}()
	// 接受消息
	go func() {
		for{
			b := make([]byte, 1024)
			count, _ := conn.Read(b)
			array := strings.Split(string(b[:count]),"-")
			user2 := new(User)
			user2.UserName = array[0]
			user2.OtherUserName = array[1]
			user2.Msg = array[2]
			user2.ServerMsg = array[3]
			if user2.ServerMsg != ""{
				fmt.Println("\t\t服务器的消息：",user2.ServerMsg)
			}else{
				fmt.Println("\t\t",user2.UserName,":",user2.Msg)
			}
		}


	}()
	wg.Wait()
}