jduff · May 5, 2010 00:53
diff --git a/unreal.html b/unreal.html
 <html>
  <head>
    <script src='http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js'></script>
    <script>
      $(document).ready(function(){
        function debug(str){ $("#debug").append("<p>" +  str + "</p>"); };
 	function send_msg_string(str) { 
 	    $("#msg").append("<p>[ OUT ]"+str+"</p>");
 	    ws.send(str+"\n");
 	}
 	function send_msg() {
 	    var args = Array.prototype.slice.call(arguments);
 	    send_msg_string(args.join("|"));
 	}
        var connected = false;
        var ws = new WebSocket("ws://localhost:8080/192.168.0.23");
        ws.onmessage = function(evt) { 
 	                  $("#msg").append("<p>[ IN  ] "+evt.data+"</p>"); 
 			  if (!connected) {
 			     if (evt.data == 'unreal connection lost') {
 				debug("The connection to unreal failed. We're borked.")
 			     } else {
 				connected = true
 				debug("unreal said hello.. starting.");
 				send_msg("INIT","JSBot","IronGuard","0");
 			     }
 			} else {
 			    arr = eval(evt.data)
 			    // Do something here stupid.
 			}
 		};
        ws.onclose = function() { debug("socket closed"); };
        ws.onopen = function() {
          debug("web socket connected...waiting for unreal to say hello.");
        };
      });
    </script>
  </head>
  <body>
    <div id="debug"></div>
    <div id="msg"></div>
  </body>
 </html>
diff --git a/unreal.rb b/unreal.rb
 require 'rubygems'
 require 'json'               # gem install json
 require 'em-websocket'       # gem install em-websocket
 require 'em-proxy/backend'   # gem install em-proxy
 DEBUG = true                 # make the proxy verbose, and probably a bit slower.
 
 # An EM thang that proxies a web socket connection to a UT3Bot backend.
 # Server Side
 #  ruby unreal.rb
 #
 # Expects that the ws:// url used to make the connection includes the hostname of the UT3Bot server in
 # the path part. 
 # Example: ws://localhost:8080/192.168.3.155
 #
 # sends UT3Bot messages back through the web socket as a JSON array string.
 #
 # See the example html file for JS side 
 #
 # Limitations/TODO
 #  - the example html file is NOT a fully functional bot.
 #    The JS code a presented will take you as far as connecting to, init-ing with, and receiving
 #    the initial SPAWNED message from the Unreal server.
 #    There is a not so politically correct comment in the JS code. That is where you write the
 #    the 'smarts' for your bot.
 #  - tested only on a Mac in Chrome 5.0.342.9
 #  - can't reconnect to the UT2Bot server if the backend connection is lost
 #  - JS example is very sloppy and could use some JS Guru luv.
 # 
 # Kudos to @igrigorik (http://github.com/igrigorik) for the rockin em-websocket and
 # em-proxy gems. And for a blog that is overflowing with awesome (http://www.igvita.com).
 
 class UnrealBackend
  def initialize(ws, options = {})
    @ws = ws
    @debug = options[:debug] || true
    @defer = EM::DefaultDeferrable.new
  end
  
  def start
    if self.host.size == 0
      @ws.send("error: no unreal host found in the websocket url path. This connection is toast.")
      @defer.callback {@ws.close_connection_after_writing}
    else
      debug :onopen, "connecting to Unreal"
      @server = EventMachine.connect(self.host, 4530, EventMachine::ProxyServer::Backend, @debug) do |c|
        c.name = :unreal
        c.plexer = self
      end
    end
  end
  
  def stop
    @server.close_connection if @server
  end
  
  def send(data)
    @server.send data
  end
  
  def host
    return @host if @host
    @host = @ws.request['Path']
    @host.slice! 0
    debug :host, "Host = #{@host.inspect}"
    @host
  end
  
  def relay_from_backend(name, data)
    @ws.send clean_message(data)
  end
  
  # called when backend unreal connection is established
  def connected(*args)
    # do nothing
  end
  # called when backend unreal connection closes
  def unbind_backend(*args)
    @ws.send("unreal connection lost")
    @defer.callback {ws.close_connection_after_writing}
  end
  
  def clean_message(data)
    msg = data.strip
    msg = $1 if msg =~/(.+)EOM$/
    msg.split('|').to_json
  end
  
  def debug(*data)
    if @debug
      require 'pp'
      pp data
      puts
    end
  end
  
 end
  
 EventMachine::WebSocket.start(:host => "0.0.0.0", :port => 8080, :debug => DEBUG) do |ws|
  @backend = UnrealBackend.new(ws, :debug => DEBUG)
  
  ws.onopen { @backend.start  }
  
  ws.onmessage { |msg| @backend.send msg }
  
  ws.onclose { @backend.stop }
  
 end
	<html>
	<head>
	<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js'></script>
	<script>
	$(document).ready(function(){
	function debug(str){ $("#debug").append("<p>" + str + "</p>"); };
	function send_msg_string(str) {
	$("#msg").append("<p>[ OUT ]"+str+"</p>");
	ws.send(str+"\n");
	}
	function send_msg() {
	var args = Array.prototype.slice.call(arguments);
	send_msg_string(args.join("\|"));
	}
	var connected = false;
	var ws = new WebSocket("ws://localhost:8080/192.168.0.23");
	ws.onmessage = function(evt) {
	$("#msg").append("<p>[ IN ] "+evt.data+"</p>");
	if (!connected) {
	if (evt.data == 'unreal connection lost') {
	debug("The connection to unreal failed. We're borked.")
	} else {
	connected = true
	debug("unreal said hello.. starting.");
	send_msg("INIT","JSBot","IronGuard","0");
	}
	} else {
	arr = eval(evt.data)
	// Do something here stupid.
	}
	};
	ws.onclose = function() { debug("socket closed"); };
	ws.onopen = function() {
	debug("web socket connected...waiting for unreal to say hello.");
	};
	});
	</script>
	</head>
	<body>
	<div id="debug"></div>
	<div id="msg"></div>
	</body>
	</html>
	require 'rubygems'
	require 'json' # gem install json
	require 'em-websocket' # gem install em-websocket
	require 'em-proxy/backend' # gem install em-proxy
	DEBUG = true # make the proxy verbose, and probably a bit slower.

	# An EM thang that proxies a web socket connection to a UT3Bot backend.
	# Server Side
	# ruby unreal.rb
	#
	# Expects that the ws:// url used to make the connection includes the hostname of the UT3Bot server in
	# the path part.
	# Example: ws://localhost:8080/192.168.3.155
	#
	# sends UT3Bot messages back through the web socket as a JSON array string.
	#
	# See the example html file for JS side
	#
	# Limitations/TODO
	# - the example html file is NOT a fully functional bot.
	# The JS code a presented will take you as far as connecting to, init-ing with, and receiving
	# the initial SPAWNED message from the Unreal server.
	# There is a not so politically correct comment in the JS code. That is where you write the
	# the 'smarts' for your bot.
	# - tested only on a Mac in Chrome 5.0.342.9
	# - can't reconnect to the UT2Bot server if the backend connection is lost
	# - JS example is very sloppy and could use some JS Guru luv.
	#
	# Kudos to @igrigorik (http://github.com/igrigorik) for the rockin em-websocket and
	# em-proxy gems. And for a blog that is overflowing with awesome (http://www.igvita.com).

	class UnrealBackend
	def initialize(ws, options = {})
	@ws = ws
	@debug = options[:debug] \|\| true
	@defer = EM::DefaultDeferrable.new
	end

	def start
	if self.host.size == 0
	@ws.send("error: no unreal host found in the websocket url path. This connection is toast.")
	@defer.callback {@ws.close_connection_after_writing}
	else
	debug :onopen, "connecting to Unreal"
	@server = EventMachine.connect(self.host, 4530, EventMachine::ProxyServer::Backend, @debug) do \|c\|
	c.name = :unreal
	c.plexer = self
	end
	end
	end

	def stop
	@server.close_connection if @server
	end

	def send(data)
	@server.send data
	end

	def host
	return @host if @host
	@host = @ws.request['Path']
	@host.slice! 0
	debug :host, "Host = #{@host.inspect}"
	@host
	end

	def relay_from_backend(name, data)
	@ws.send clean_message(data)
	end

	# called when backend unreal connection is established
	def connected(*args)
	# do nothing
	end
	# called when backend unreal connection closes
	def unbind_backend(*args)
	@ws.send("unreal connection lost")
	@defer.callback {ws.close_connection_after_writing}
	end

	def clean_message(data)
	msg = data.strip
	msg = $1 if msg =~/(.+)EOM$/
	msg.split('\|').to_json
	end

	def debug(*data)
	if @debug
	require 'pp'
	pp data
	puts
	end
	end

	end

	EventMachine::WebSocket.start(:host => "0.0.0.0", :port => 8080, :debug => DEBUG) do \|ws\|
	@backend = UnrealBackend.new(ws, :debug => DEBUG)

	ws.onopen { @backend.start }

	ws.onmessage { \|msg\| @backend.send msg }

	ws.onclose { @backend.stop }

	end