Flash / Flex / ActionScript/Network/Socket

Close the Socket in Finally branch

   <source lang="java">

package {

   import flash.display.Sprite;
   import flash.errors.IOError;
   import flash.net.Socket;
   public class Main extends Sprite
   {
       public function Main()
       {
           try
           {
               var s:Socket = new Socket();
               s.connect("http://www.cmu.edu/", 80);
           } catch(error:IOError) {
               trace("I/O Error:", error.message);
           } catch(error:SecurityError) {
               trace("Security Error:", error.message);
           } finally {
               s.close();
           }
       }
   }

}

       </source>
   
  

Connecting to a Socket Server

   <source lang="java">

package {

 import flash.display.Sprite;
 import flash.events.*;
 import flash.net.Socket;
 public class Main extends Sprite {
 
   private var socket:Socket;
 
   public function Main(  ) {
     socket = new Socket(  );
     
     socket.addEventListener( Event.CONNECT, onConnect );
     
     socket.connect( "localhost", 2900 );
   }
   
   private function onConnect( event:Event ):void {
     trace( "The socket is now connected..." );  
   }
   
 }

}

       </source>
   
  

Handling a Built-in Exception

   <source lang="java">

package{

 import flash.display.Sprite;
 
 public class Main extends Sprite{
   public function Main(){
       var socket:Socket = new Socket(  );
       
       try {
         socket.connect("example.ru", userPort);
       } catch (e:SecurityError) {
       }
   }
 }

}

       </source>
   
  

Handling Asynchronous Errors: IOErrorEvent

   <source lang="java">

package {

   import flash.display.Sprite;
   import flash.net.Socket;
   import flash.events.Event;
   import flash.events.IOErrorEvent;
   public class Main extends Sprite
   {
       protected var sock:Socket = new Socket();
       public function Main()
       {
           super();
           sock.addEventListener(Event.CONNECT, onSocketOpen);
           sock.addEventListener(IOErrorEvent.IO_ERROR, onIOError);
           sock.connect("www.cmu.edu", 80);
       }
       protected function onSocketOpen(event:Event):void
       {
           trace("Connected succesfully!");
           sock.close();
       }
       protected function onIOError(event:IOErrorEvent):void
       {
           trace(event.text);
           //Error #2031: Socket Error. URL: www.cmu.edu
           sock.close();
       }
   }

}

       </source>
   
  

Receiving Data

   <source lang="java">

Socket read methods for various datatypes package {

 import flash.display.Sprite;
 import flash.events.ProgressEvent;
 import flash.net.Socket;
 public class SocketExample extends Sprite {
 
   private var socket:Socket;
 
   public function SocketExample(  ) {
     socket = new Socket(  );
     
     socket.addEventListener( ProgressEvent.SOCKET_DATA, onSocketData );
     socket.connect( "localhost", 2900 );
   }
   private function onSocketData( event:ProgressEvent ):void {
     trace( "Socket received " + socket.bytesAvailable + " byte(s) of data:" );
     while ( socket.bytesAvailable ) {
       var data:int = socket.readByte(  );
       trace( data );
     }
   }
 }

}

       </source>
   
  

Sending Data

   <source lang="java">

package{

 import flash.display.Sprite;
 import flash.net.*;
 public class Main extends Sprite{
   public function Main(){
       var socket:Socket = new Socket(  );
       socket.writeMultiByte("example", "unicode");
       socket.writeUTFBytes("USER exampleUsername\n");
       
       socket.writeByte(1);
       socket.writeByte(5);
       socket.writeByte(4);
       socket.writeByte(8);
       socket.flush(  );
   }
 }

}

       </source>