go实现udp数据通信

代码展示

服务端

package main

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

func main(){
    Conn,err:=net.ListenUDP("udp",&net.UDPAddr{
        IP: net.IPv4(127,0,0,1),
        Port: 40000,
    })
    if err != nil {
        fmt.Println("listen udp is error")
        return
    }
    var data [1024]byte
    for {
        n,Addr,_:=Conn.ReadFromUDP(data[:])
        msg:=string(data[:n])
        newmsg:=strings.ToUpper(msg)
        Conn.WriteToUDP([]byte(newmsg),Addr)
    }
}

客户端代码

package main

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

func main(){
    socket,err:=net.DialUDP("udp",nil,&net.UDPAddr{
        IP : net.IPv4(0,0,0,0),
        Port: 40000,
    })
    if err != nil {
        log.Fatal("is erros")
    }
    defer socket.Close()
    var reply [1024]byte
    for {
        reader:= bufio.NewReader(os.Stdin)
        msg,_:= reader.ReadString('\n')
        socket.Write([]byte(msg))

        n,_,err:= socket.ReadFromUDP(reply[:])

        if err != nil {
            fmt.Println("is error")
        }
        msgData:= string(reply[:n])
        fmt.Printf("%v\n",msgData)
    }
}