【收藏】Flex数据通讯

Flex/Flash 支持的数据通讯方式有：
http URLLoader
SOAP(webservice)
json
xml
flash remoting / AMF3
xmlsocket
socket(二进制)(自定义协议)
高并发的应用中用户状态可以用cookie，不用session
如果是多人实时交互如聊天系统，多人在线互动等应用模块　需要用socket进行通讯(与服务器建立长连接)，服务器端可以自己写多线程Socket Server也可以基于现有开源的Socket lib进行开发，比如QuickServer和XSocket.
读取非实时交互数据如房间列表，游戏列表，用户信息等数据，目前推荐用flash remoting AMF3协议
以下是一个FLASH AS3写的Socket通讯类
package net
{
import flash.events.*;
import flash.net.*;
import flash.utils.*;

public class mySocket extends EventDispatcher
{
private var nStatus:int = 0;
private var ndx:int = 0;
private var packet:ByteArray;
private const REQ_PROCESS:int = 4;
private var packetlen:uint = 0;
public var port:int;
private var readpacket:ByteArray;
public var connected:Boolean = false;
private const REQ_DONE:int = 3;
public var host:String;
private var packetbody:ByteArray;
private var readbodypos:int = 8;
private const REQ_REQUEST:int = 0;
private var nreadPos:int = 0;
private const PACKET_HEADER_SIZE:int = 8;
private const REQ_BODY:int = 2;
private var nBodyLen:uint = 0;
private const REQ_ERROR:int = 5;
private const PACKET_BUFFER_SIZE:int = 16384;
private const REQ_HEADER:int = 1;
private var socket:Socket;

public function mySocket(param1:Boolean = false, param2:String = "String")
{
packetlen = 0;
nStatus = 0;
nreadPos = 0;
nBodyLen = 0;
ndx = 0;
connected = false;
readbodypos = PACKET_HEADER_SIZE;
packet = new ByteArray();
packetbody = new ByteArray();
readpacket = new ByteArray();
readpacket.end