Go UDP write receive example

udp_client.go

package main

import (
  "net"
)

func main(){
  message := []byte("Hello world")
  localAddress, _ := net.ResolveUDPAddr("udp", "127.0.0.1:0")
  remoteAddress, _ := net.ResolveUDPAddr("udp", "127.0.0.1:1936")
  conn, err := net.DialUDP("udp", localAddress, remoteAddress)
  if err != nil {panic(err)}
  defer conn.Close()

  n, err := conn.Write(message)
  if err != nil {
    panic(err)
  }
  println("---> Send message", n)
}

udp_server.go

package main

import (
  "net"
  "io/ioutil"
)

func main(){
  var buf []byte = make([]byte, 512)
  addr, _ := net.ResolveUDPAddr("udp", ":1936")
  conn, _ := net.ListenUDP("udp", addr)
  defer conn.Close()

  for {
    n, _, _ := conn.ReadFromUDP(buf)
    println("---> Received", buf[0:n])
    ioutil.WriteFile("message.txt", buf, 0644)
  }
}