ben-bradley/varan.js

## varan.js
/* http://en.wikipedia.org/wiki/Varan */
var Faye = require('faye'),
		express = require('express'),
		ping = require('ping');

var bayeux = new Faye.NodeAdapter({ mount: '/faye', timeout: 45 }),
		client = bayeux.getClient(),
		app = express();

app.configure(function() {
	app.use(express.bodyParser());
	app.use(express.static(__dirname + '/ui'));
});

client.subscribe('/ping', function(msg) {
	ping.sys.probe(msg.host, function(alive) {
		msg.alive = alive;
		client.publish('/pong', msg);
	});
});

var server = app.listen(8000);
bayeux.attach(server);

## varan_ui_index.html
<html>
	<head>
		<script src='js/lib/jquery-2.1.0.min.js'></script>
		<script src='faye/client.js'></script>
	</head>
	<body>
		<h1>Chat Client</h1>
		<div id='messages'></div>
		<input type='text' id='host' />
		<input type='button' value='Ping' id='ping' />
		<script type='text/javascript'>
			$(function() {
				var client = new Faye.Client('/faye', { timeout: 20 });
				client.subscribe('/pong', function(message) {
					$('#messages').append('<p>'+message.host+' is '+message.alive+'</p>');
				});

				var $host = $('#host');
				$('#ping').on('click', function() {
					client.publish('/ping', { host: $host.val() });
				});
			});
		</script>
	</body>
</html>
	/* http://en.wikipedia.org/wiki/Varan */
	var Faye = require('faye'),
	express = require('express'),
	ping = require('ping');

	var bayeux = new Faye.NodeAdapter({ mount: '/faye', timeout: 45 }),
	client = bayeux.getClient(),
	app = express();

	app.configure(function() {
	app.use(express.bodyParser());
	app.use(express.static(__dirname + '/ui'));
	});

	client.subscribe('/ping', function(msg) {
	ping.sys.probe(msg.host, function(alive) {
	msg.alive = alive;
	client.publish('/pong', msg);
	});
	});

	var server = app.listen(8000);
	bayeux.attach(server);
	<html>
	<head>
	<script src='js/lib/jquery-2.1.0.min.js'></script>
	<script src='faye/client.js'></script>
	</head>
	<body>
	<h1>Chat Client</h1>
	<div id='messages'></div>
	<input type='text' id='host' />
	<input type='button' value='Ping' id='ping' />
	<script type='text/javascript'>
	$(function() {
	var client = new Faye.Client('/faye', { timeout: 20 });
	client.subscribe('/pong', function(message) {
	$('#messages').append('<p>'+message.host+' is '+message.alive+'</p>');
	});

	var $host = $('#host');
	$('#ping').on('click', function() {
	client.publish('/ping', { host: $host.val() });
	});
	});
	</script>
	</body>
	</html>