【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.endian = Endian.LITTLE_ENDIAN; packet.endian = Endian.LITTLE_ENDIAN; packetbody.endian = Endian.LITTLE_ENDIAN; return; }// end function public function writeBegin(param1:int, param2:int = 0, param3:int = 0) : void { param2 = SERVER_PACKET_VER; param3 = SERVER_SUBPACKET_VER; packetlen = 0; packet.position = 0; packet.length = 0; packetbody.position = 0; packetbody.length = 0; packet.writeMultiByte("AA", "gb2312"); packet.writeShort(param1); packet.writeByte(param2); packet.writeByte(param3); return; }// end function public function writeByte(param1:int) : void { packetlen = packetlen + 1; packetbody.writeByte(param1); return; }// end function public function writeInt(param1:int) : void { packetlen = packetlen + 4; packetbody.writeInt(param1); return; }// end function public function getbodylen() : int { readpacket.position = 6; return readpacket.readShort(); }// end function public function readUint() : uint { readpacket.position = readbodypos; readbodypos = readbodypos + 4; return readpacket.readUnsignedInt(); }// end function private function parse_header() : Boolean { var _loc_1:ByteArray; var _loc_2:int; _loc_1 = new ByteArray(); _loc_1.writeMultiByte("AA", "gb2132"); if (readpacket[0] != _loc_1[0] || readpacket[1] != _loc_1[1]) { _loc_1 = null; return false; }// end if _loc_1 = null; _loc_2 = getcmd(); if (_loc_2 <= 0 || _loc_2 >= 32000) { return false; }// end if nBodyLen = getbodylen(); if (nBodyLen >= 0 && nBodyLen < PACKET_BUFFER_SIZE - PACKET_HEADER_SIZE) { return true; }// end if return false; }// end function public function getcmd() : int { readpacket.position = 2; return readpacket.readShort(); }// end function public function getver() : int { readpacket.position = 4; return readpacket.readByte(); }// end function private function socketDataFun(param1:ProgressEvent) : void { var _loc_2:int; var _loc_3:mySocketEvent; ndx = 0; _loc_2 = socket.bytesAvailable; while (ndx < _loc_2 && nStatus != REQ_ERROR) { // label switch(nStatus) { case REQ_REQUEST: case REQ_HEADER: { if (!read_header(_loc_2)) { break; }// end if if (!parse_header()) { nStatus = REQ_ERROR; break; } else { nStatus = REQ_BODY; }// end case }// end else if case REQ_BODY: { if (parse_body(_loc_2)) { nStatus = REQ_DONE; }// end if break; }// end case default: { return; break; }// end default }// end switch if (nStatus == REQ_ERROR) { return; }// end if if (nStatus == REQ_DONE) { _loc_3 = new mySocketEvent(mySocketEvent.SYNC); dispatchEvent(_loc_3); _loc_3 = null; reset(); }// end if }// end while return; }// end function public function sendcmd() : void { if (connected) { socket.writeBytes(packet, 0, packetlen + PACKET_HEADER_SIZE); socket.flush(); }// end if return; }// end function private function parse_body(param1:int) : Boolean { var _loc_2:int; var _loc_3:int; var _loc_4:uint; var _loc_5:int; _loc_2 = nBodyLen + PACKET_HEADER_SIZE - nreadPos; _loc_3 = param1 - ndx; if (_loc_2 <= 0) { return true; }// end if if (_loc_3 <= 0) { return false; }// end if _loc_4 = _loc_3 < _loc_2 ? (_loc_3) : (_loc_2); _loc_5 = readpacket.length + _loc_4; if (_loc_5 > PACKET_BUFFER_SIZE) { return false; }// end if socket.readBytes(readpacket, readpacket.position, _loc_4); nreadPos = nreadPos + _loc_4; ndx = ndx + _loc_4; if (nreadPos < nBodyLen + PACKET_HEADER_SIZE) { readpacket.position = nreadPos; return false; }// end if return true; }// end function public function getsubver() : int { readpacket.position = 5; return readpacket.readByte(); }// end function private function securityerrfun(param1:SecurityErrorEvent) : void { close(); dispatchEvent(new mySocketEvent(mySocketEvent.SECURITYERROR)); return; }// end function public function readByte() : int { readpacket.position = readbodypos; readbodypos = readbodypos + 1; return readpacket.readByte(); }// end function public function readShort() : int { readpacket.position = readbodypos; readbodypos = readbodypos + 2; return readpacket.readShort(); }// end function private function connectFun(param1:Event) : void { connected = true; clearEvent(); socket.addEventListener(ProgressEvent.SOCKET_DATA, socketDataFun); socket.addEventListener(Event.CLOSE, closeFun); dispatchEvent(new mySocketEvent(mySocketEvent.CONNECT)); return; }// end function private function reset() : void { nStatus = REQ_REQUEST; nreadPos = 0; nBodyLen = 0; readpacket.position = 0; readpacket.length = 0; return; }// end function public function readbegin() : void { readbodypos = PACKET_HEADER_SIZE; return; }// end function private function read_header(param1:int) : Boolean { while (nreadPos < PACKET_HEADER_SIZE && ndx < param1) { // label socket.readBytes(readpacket, nreadPos, 1); nreadPos++; ndx++; }// end while if (nreadPos < PACKET_HEADER_SIZE) { return false; }// end if return true; }// end function public function writeString(param1:String) : void { var _loc_2:ByteArray; _loc_2 = new ByteArray(); _loc_2.writeMultiByte(param1, "utf-8"); packetbody.writeUnsignedInt(_loc_2.length + 1); packetlen = packetlen + 4; packetbody.writeBytes(_loc_2); packetbody.writeByte(int("0")); packetlen = packetlen + (_loc_2.length + 1); _loc_2 = null; return; }// end function public function readgb2132String() : String { var _loc_1:uint; readpacket.position = readbodypos; readbodypos = readbodypos + 4; _loc_1 = readpacket.readUnsignedInt(); readpacket.position = readbodypos; readbodypos = readbodypos + _loc_1; return readpacket.readMultiByte(_loc_1, "gb2132"); }// end function public function writeUint(param1:uint) : void { packetlen = packetlen + 4; packetbody.writeUnsignedInt(param1); return; }// end function public function writeShort(param1:int) : void { packetlen = packetlen + 2; packetbody.writeShort(param1); return; }// end function private function errorFun(param1:IOErrorEvent) : void { close(); dispatchEvent(new mySocketEvent(mySocketEvent.ERROR)); return; }// end function public function readString() : String { var _loc_1:uint; readpacket.position = readbodypos; readbodypos = readbodypos + 4; _loc_1 = readpacket.readUnsignedInt(); readpacket.position = readbodypos; readbodypos = readbodypos + _loc_1; return readpacket.readMultiByte(_loc_1, "utf-8"); }// end function public function connect(param1:String, param2:int) : void { host = param1; port = param2; if (connected) { socket.close(); }// end if socket = new Socket(); socket.endian = Endian.LITTLE_ENDIAN; socket.connect(host, port); reset(); socket.addEventListener(IOErrorEvent.IO_ERROR, errorFun); socket.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityerrfun); socket.addEventListener(Event.CONNECT, connectFun); return; }// end function private function clearEvent() : void { if (socket != null) { if (socket.hasEventListener(IOErrorEvent.IO_ERROR)) { socket.removeEventListener(IOErrorEvent.IO_ERROR, errorFun); }// end if if (socket.hasEventListener(Event.CONNECT)) { socket.removeEventListener(Event.CONNECT, connectFun); }// end if if (socket.hasEventListener(ProgressEvent.SOCKET_DATA)) { socket.removeEventListener(ProgressEvent.SOCKET_DATA, socketDataFun); }// end if if (socket.hasEventListener(Event.CLOSE)) { socket.removeEventListener(Event.CLOSE, closeFun); }// end if if (socket.hasEventListener(SecurityErrorEvent.SECURITY_ERROR)) { socket.removeEventListener(SecurityErrorEvent.SECURITY_ERROR, securityerrfun); }// end if }// end if return; }// end function private function closeFun(param1:Event) : void { connected = false; dispatchEvent(new mySocketEvent(mySocketEvent.CLOSE)); return; }// end function public function readInt() : int { readpacket.position = readbodypos; readbodypos = readbodypos + 4; return readpacket.readInt(); }// end function public function writeEnd() : void { packet.writeShort(packetlen); packet.writeBytes(packetbody, 0, packetlen); return; }// end function public function close() : void { clearEvent(); if (connected) { connected = false; socket.close(); socket = null; }// end if return; }// end function } }