[ActionScript 3.0] UDP通信

package com.controls.socket
{
    import flash.events.DatagramSocketDataEvent;
    import flash.events.Event;
    import flash.events.EventDispatcher;
    import flash.net.DatagramSocket;
    import flash.utils.ByteArray;

    /**
     * @author: Frost.Yen
     * @E-mail: 871979853@qq.com
     * @create: 2017-11-25 下午2:55:53
     *
     */
    public class DatagramSocketManager extends EventDispatcher
    {
        private var _datagramSocket:DatagramSocket = new DatagramSocket();
        private static var _instance:DatagramSocketManager;
        public var data:String;
        public function DatagramSocketManager(s:S)
        {
        }
        public static function getInstance():DatagramSocketManager
        {
            if(!_instance){
                _instance = new DatagramSocketManager(new S());
            }
            return _instance;
        }
        
        public function send(msg:Object,address:String,port:int):void{
            //Create a message in a ByteArray
            var data:ByteArray = new ByteArray();
            
            if(msg is String){
                data.writeUTFBytes( msg as String );
            }else{
                data.writeUTFBytes( JSON.stringify(msg) );
            }
            //Send a datagram to the target
            try
            {
                _datagramSocket.send( data, 0, 0, address, port); 
                log( "Sent message to " + address + ":" +port);
                
            }
            catch ( error:Error )
            {
                log( error.message );
            }
        }
        
        public function bind(port:int,ip:String):void
        {
            if( _datagramSocket.bound ) 
            {
                _datagramSocket.close();
                _datagramSocket = new DatagramSocket();
                
            }
            _datagramSocket.bind(port, ip );
            _datagramSocket.addEventListener( DatagramSocketDataEvent.DATA, dataReceived );
            _datagramSocket.receive();
            log( "Bound to: " + _datagramSocket.localAddress + ":" + _datagramSocket.localPort );
        }
        private function dataReceived( event:DatagramSocketDataEvent ):void
        {
            //Read the data from the datagram
            data = event.data.readUTFBytes( event.data.bytesAvailable ) ;
            log("Received from " + event.srcAddress + ":" + event.srcPort + "> " + data);
            
            this.dispatchEvent(new Event(Event.CHANGE));
        }
        
        public function log(message:String):void
        {
            trace(message);
        }
    }
}
class S{};

用法：

DatagramSocketManager.getInstance().bind(8090,"127.0.0.1");
DatagramSocketManager.getInstance().addEventListener(Event.CHANGE,onGetUDPMsg);

private function onGetUDPMsg(e:Event):void{
    trace("接收到服务器发送过来的消息",DatagramSocketManager.getInstance().data);
    try
    {
        var data:Object = JSON.parse(DatagramSocketManager.getInstance().data);
    } 
    catch(error:Error) 
    {
                
    }
}