course/networkProgram/UDP/udp_client.go

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package main
import (
"bufio"
"fmt"
"log"
"net"
"os"
)
//UDP client
func main() {
socket, err := net.DialUDP("udp", nil, &net.UDPAddr{
IP: net.IPv4(127, 0, 0, 1),
Port: 40000,
})
if err != nil {
log.Fatal("连接服务端失败err", err)
return
}
defer socket.Close()
reader := bufio.NewReader(os.Stdin)
reply := make([]byte, 512)
for {
fmt.Print("> ")
msg, _ := reader.ReadString('\n')
socket.Write([]byte(msg))
//收回复的数据
n, _, err := socket.ReadFromUDP(reply)
if err != nil {
fmt.Println("read reply msg failed:", err)
return
}
fmt.Print(string(reply[:n]))
}
}