Communicate between Flash and Ruby over sockets

socket_sample_server.rb

require 'rubygems'
require 'eventmachine'

module SocketSampleServer
  def post_init
    puts "Connecting: someone connected to the echo server!"
  end
  
  def receive_data data
    send_data "Received: #{data}"
  end
end

EventMachine::run do
  EventMachine::start_server "127.0.0.1", 8081, SocketSampleServer
end

SocketSample.as

package {
  import flash.display.Sprite;
  import flash.net.Socket;
  import flash.events.Event;
  import flash.events.IOErrorEvent;
  import flash.events.ProgressEvent;

  public class SocketSample extends Sprite {
    private var socket:Socket;

    public function SocketSample() {
      socket = new Socket();

      socket.addEventListener(Event.CONNECT, onConnect);
      socket.addEventListener(Event.CLOSE, onClose);
      socket.addEventListener(IOErrorEvent.IO_ERROR, onError);
      socket.addEventListener(ProgressEvent.SOCKET_DATA, onResponse);

      socket.connect("localhost", 8081);
    }
    private function onConnect(e:Event):void {
      trace("Connected!");

      socket.writeUTFBytes("Sending: Hello, world!");
      socket.flush();
    }
    private function onResponse(e:ProgressEvent):void {
      trace(socket.readUTFBytes(socket.bytesAvailable));
    }
    private function onError(e:IOErrorEvent):void {}
    private function onClose(e:Event):void {}
  }
}