让ie6也支持websocket采用flash封装实现

package { 
import flash.display.Stage; 
import flash.display.Sprite; 
import flash.events.*; 
import flash.external.ExternalInterface; 
import flash.system.Security; 
import flash.utils.Timer; 
import flash.net.Socket; 
import flash.utils.ByteArray; 
import flash.utils.Endian; 
public class websocket4ie extends Sprite { 
public static function main():void 
{ 
var websocket4ie:websocket4ie = new websocket4ie(); 
} 
private var debugEnabled:Boolean; 
private var movieName:String; 
private var handlers:String; 
private var server:String; 
private var port:Number; 
private var isDebug:Number; 
private var socket:Socket; 
private var socketBuffer:ByteArray = new ByteArray(); 
public function websocket4ie() { 
Security.allowDomain("*"); 
var counter:Number = 0; 
root.addEventListener(Event.ENTER_FRAME, function ():void { if (++counter > 100) counter = 0; }); 
this.movieName = root.loaderInfo.parameters.movieName; 
this.handlers = root.loaderInfo.parameters.handlers; 
this.server = root.loaderInfo.parameters.server; 
this.port = root.loaderInfo.parameters.port; 
this.isDebug = root.loaderInfo.parameters.debug; 
this.debug(this.port+''+this.server); 
try { 
this.debugEnabled = root.loaderInfo.parameters.debugEnabled == "true" ? true : false; 
} catch (ex:Object) { 
this.debugEnabled = false; 
} 
this.connectServer(); 
ExternalInterface.addCallback("sendData", this.sendData); 
} 
public function connectServer():void { 
socket = new Socket(); 
socket.endian = Endian.BIG_ENDIAN; 
socket.addEventListener(Event.CONNECT, onConnect); 
socket.addEventListener(Event.CLOSE, onClose); 
socket.addEventListener(IOErrorEvent.IO_ERROR, onIOError); 
socket.addEventListener(SecurityErrorEvent.SECURITY_ERROR, onSecurityError); 
socket.addEventListener(ProgressEvent.SOCKET_DATA, onSocketData); 
socket.connect(this.server, this.port); 
this.socket = socket; 
} 
public function onConnect(e:Event):void { 
//握手 
var headers:Array = new Array(); 
headers.push("GET /chat HTTP/1.1\r\n"); 
headers.push("Upgrade: websocket\r\n"); 
headers.push("Connection: Upgrade\r\n"); 
headers.push("Host: "+this.server+":"+this.port+"\r\n"); 
headers.push("Origin: null\r\n"); 
headers.push("Sec-WebSocket-Key: 6z4ezNfATjW5/FEMYpqRuw==\r\n"); 
headers.push("Sec-WebSocket-Version: 13\r\n\r\n\r\n"); 
this.socket.writeUTFBytes(headers.join('')); 
this.socket.flush(); 
} 
public function onTrueConnect():void { 
ExternalInterface.call(this.handlers+".onConnect",this.movieName); 
} 
public function onClose(e:Event):void { 
ExternalInterface.call(this.handlers+".onClose",this.movieName,'1'); 
} 
public function onIOError(e:IOErrorEvent):void { 
ExternalInterface.call(this.handlers+".onClose",this.movieName,'2'); 
} 
public function onSecurityError(e:SecurityErrorEvent):void { 
ExternalInterface.call(this.handlers+".onClose",this.movieName,'3'); 
} 
public var step:String = "head"; 
public var position:Number = 0; 
public function readOnData():void { 
var tmpPos:Number = this.position; 
this.socketBuffer.position = this.position; 
//read 一个 0x81 
if(this.socketBuffer.bytesAvailable>=1) { 
var h:Number = this.socketBuffer.readUnsignedByte(); 
this.debug("头:"+h); 
this.position += 1; 
if(this.socketBuffer.bytesAvailable>=1) { 
var len:Number = this.socketBuffer.readUnsignedByte(); 
this.debug("长度:"+len); 
this.position += 1; 
if(len<=125) { 
if(this.socketBuffer.bytesAvailable>=len) { 
this.onText(this.socketBuffer.readUTFBytes(len)); 
this.position += len; 
this.readOnData(); 
} else { 
this.position = tmpPos; 
return; 
} 
} else if(len==126) { 
if(this.socketBuffer.bytesAvailable>=2) { 
var trueLen:Number = this.socketBuffer.readUnsignedShort(); 
if(this.socketBuffer.bytesAvailable>=trueLen) { 
this.onText(this.socketBuffer.readUTFBytes(trueLen)); 
this.position += trueLen; 
this.readOnData(); 
} 
} else { 
this.position = tmpPos; 
return; 
} 
} 
} else { 
this.position = tmpPos; 
return; 
} 
} else { 
this.position = tmpPos; 
return; 
} 
} 
public function onText(text:String):void { 
ExternalInterface.call(this.handlers+".onData",this.movieName,text); 
} 
public function writeBytes(bytes:ByteArray):void { 
this.socketBuffer.position = this.socketBuffer.length; 
this.socketBuffer.writeBytes(bytes,0,bytes.length); 
this.debug("buffer数据:"+this.socketBuffer.length); 
this.readOnData(); 
} 
public var is_head:Boolean = true; 
public var header:ByteArray = new ByteArray(); 
public var headers:Array = new Array(); 
public function onSocketData(e:Event):void { 
var bytes:ByteArray = new ByteArray(); 
if(this.is_head) { 
while(this.socket.bytesAvailable) { 
var x:Number = this.socket.readUnsignedByte(); 
if(x==0x81) { 
this.is_head = false; 
bytes.writeByte(0x81); 
this.debug(this.headers); 
break; 
} else { 
this.header.writeByte(x); 
if(x==10) { 
this.header.position = 0; 
this.headers.push(this.header.readUTFBytes(this.header.length)); 
if(this.header.length==2) { 
this.onTrueConnect(); 
} 
this.header = new ByteArray(); 
} 
continue; 
} 
} 
if(this.socket.bytesAvailable) { 
this.socket.readBytes(bytes,1,this.socket.bytesAvailable); 
} 
} else { 
this.socket.readBytes(bytes,0,this.socket.bytesAvailable); 
} 
bytes.position = 0; 
this.writeBytes(bytes); 
} 
public function sendData(text:String):void { 
var head:ByteArray = new ByteArray(); 
head.writeByte(0x81); 
var body:ByteArray = new ByteArray(); 
body.writeUTFBytes(text); 
var len:Number = body.length; 
if(len<=125) { 
head.writeByte(len); 
} else if(len<65536){ 
head.writeByte(126); 
head.writeShort(len); 
} else { 
head.writeByte(127); 
head.writeUnsignedInt(len); 
} 
body.position = 0; 
head.position = 0; 
this.socket.writeBytes(head); 
this.socket.writeBytes(body); 
this.socket.flush(); 
} 
public function debug(str:*):void { 
if(this.isDebug) { 
ExternalInterface.call(this.handlers+".debug",this.movieName,str); 
} 
} 
} 
}

var handlers = { 
'connects':[], 
'onClose':function(index,flag) { 
this.connects[index.replace("socket_","")].onClose(); 
}, 
'onConnect':function(index) { 
this.connects[index.replace("socket_","")].onConnect(); 
}, 
'onData':function(index,text) { 
this.connects[index.replace("socket_","")].onData(text); 
}, 
'debug':function(index,str) { 
console.log(str); 
} 
}; 
function socket4ie() { 
this.debug = 0; 
this.init = function() { 
this.index = handlers.connects.length; 
handlers.connects.push(this); 
} 
this.connect = function(domain,port) { 
this.createFlash(domain,port); 
} 
this.createFlash = function(domain,port) { 
var html = '<object id="socket_'+this.index+'" type="application/x-shockwave-flash" data="websocket4ie.swf" width=0 height=0 class="swfupload">\ 
<param name="wmode" value="window">\ 
<param name="movie" value="websocket4ie.swf">\ 
<param name="quality" value="high">\ 
<param name="menu" value="false">\ 
<param name="allowScriptAccess" value="always">\ 
<param name="flashvars" value="movieName=socket_'+this.index+'&handlers=handlers&server='+domain+'&port='+port+'&debug='+this.debug+'"></object>'; 
var div = document.createElement('div'); 
div.id = "flash_"+this.index; 
div.innerHTML = html; 
document.body.appendChild(div); 
} 
this.onClose = function() { 
} 
this.onConnect = function() { 
} 
this.onData = function(text) { 
} 
this.init(); 
}