前段时间在flashseer看到有人提到:可以通过socket方式传送swf文件,让用户无法获取到swf文件… 当时还没有出as3的反编译,所以对程序的保护没有在意.随着反编译程序的平民化,不希望别人看到源代码的朋友就比较着急…

通过socket方式传送swf文件来避免泄漏源代码的思路(只适用as3): 让主程序的loader(前台swf)通过socket连接到后台程序,然后请求需要的主程序文件.后台读取主程序数据通过socket发送给主程序的 loader.前台swf适用Loader.loadBytes方法显示主程序文件.

下面是测试的源程序:

package {import flash.display.Sprite;import flash.NET.Socket;import flash.events.*;import flash.errors.IOError;import flash.display.Loader;public class SocketTest extends Sprite {  public function SocketTest() {  var socket = new Socket();  socket.connect("localhost", 5277);  socket.addEventListener(Event.CLOSE, closeHandler);  socket.addEventListener(Event.CONNECT, connectHandler);  socket.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);  socket.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);  socket.addEventListener(ProgressEvent.SOCKET_DATA, socketDataHandler);  var response:String;  function writeln(str:String):void {   str+="";   try {   socket.writeUTFBytes(str);   } catch (e:IOError) {   trace(e);   }  }  function sendRequest():void {   trace("sendRequest");   response="";   writeln('bin');   socket.flush();  }  function readResponse():void {   //接受数据   var str:String=socket.readUTFBytes(socket.bytesAvailable);   response+=str;   //当数据以end结束的时候,数据传输结束   if (StringUtil.endsWith(str,'end')) {   response=response.substr(0,response.length-3);   //把字符串转换为ByteArray   var ba=Base64.decodeToByteArray(response);   //trace('bytearray=====',ba);   var l:Loader = new Loader();   //从 ByteArray 对象中所存储的二进制数据中加载。   l.loadBytes(ba);   //trace(l.content);   addChild(l);   }  }  function closeHandler(e:Event):void {   trace("Socket closed! ");  }  function connectHandler(e:Event):void {   trace("Socket connected!");   sendRequest();  }  function ioErrorHandler(e:IOErrorEvent):void {   trace("IOError!");  }  function securityErrorHandler(e:SecurityErrorEvent):void {   trace("SecurityError!");  }  function socketDataHandler(e:ProgressEvent):void {   trace("Socket have data!");   readResponse();  }  }}}

php:

//后台scoket程序,由于适用php写比较简单,就用php写了.//error_reporting(E_ALL);error_reporting(0);set_time_limit(0);ob_implicit_flush();$address = 'localhost';$port = 5277;if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) < 0) {echo 'socket_create() failed: reason: ' . socket_strerror($sock) . '/n';}if (($ret = socket_bind($sock, $address, $port)) < 0) {echo 'socket_bind() failed: reason: ' . socket_strerror($ret) . '/n';}if (($ret = socket_listen($sock, 5)) < 0) {echo 'socket_listen() failed: reason: ' . socket_strerror($ret) . '/n';}echo 'connect…………….';do {if (($msgsock = socket_accept($sock)) < 0) {  echo 'socket_accept() failed: reason: ' . socket_strerror($msgsock) . '/n';  break;}do {  socket_recv($msgsock, $buf, 2048, 0);  if ($buf == "") {  socket_close($msgsock);  echo "some one quit";  break;  } else if ($buf == "bin") {  //读取主程序数据  $f = fopen('main.swf','r');  $data = fread($f,filesize('main.swf'));  fclose($f);  //转换为字符串  //echo base64_encode($data);  $talkback = base64_encode($data).'end';  }  //发送  socket_send($msgsock, $talkback, strlen($talkback),0);} while (true);socket_close($msgsock);} while (true);socket_close($sock);

php技术：php与flash as3 socket通信传送文件实现代码，转载需保留来源！

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