private static var pack_len : int;  private static var buffer : ByteArray;    private static function OnSocketData (event:ProgressEvent) : void  {      while (socket.bytesAvailable > 0)      {          if (pack_len == -1)          {              pack_len = socket.readShort();                buffer = new ByteArray();          }            socket.readBytes(buffer, 0, pack_len - buffer.length);            if (buffer.length == pack_len)          {              ParseSocketData(buffer);                pack_len = -1;          }      }  }