clarle/index.html

## index.html
<!doctype html>
<html>
  <head>
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            $('#user-submit').click(function () {
                var payload = {
                    name: $('#user-name').val(),
                    msg: $('#user-msg').val()
                };

                $.ajax({
                    url: "/users",
                    type: "POST",
                    contentType: "application/json",
                    processData: false,
                    data: JSON.stringify(payload),
                    complete: function (data) {
                        $('#output').html(data.responseText);
                    }
                });
            });

            $('#left-submit').click(function () {
                var url = "/messages/" + $('#left-name').val();

                $.ajax({
                    url: url,
                    complete: function (data) {
                        $('#output').html(data.responseText);
                    }
                });
            });
        });
    </script>
  </head>
  <body>
    <h3>Enter a username and message to enter into the database:</h3>
    <input id="user-name" type="text" placeholder="Username"/>
    <input id="user-msg" type="text" placeholder="Message"/>
    <input id="user-submit" type="submit" />
    <h3>Enter a username to get the message they left:</h3>
    <input id="left-name" type="text" placeholder="Username"/>
    <input id="left-submit" type="submit" />
    <p id="output"></p>
  </body>
</html>

## server.js
var express = require('express'),
    Y       = require('yui/cache');

var app = module.exports = express();

// Database setup

var db = new Y.Cache({max: 5});

// Configuration

app.use(express.bodyParser());

// Main route sends our HTML file

app.get('/', function(req, res) {
    res.sendfile(__dirname + '/index.html');
});

// Get our messages

app.get('/messages/:user', function (req, res) {
    var data = db.retrieve(req.params.user);
    res.send(req.params.user + ' said: ' + data.response);
});

// Update database

app.post('/users', function (req, res) {
    db.add(req.body.name, req.body.msg);
    res.send(req.body.name + ' was added to the database');
});

// Begin listening

app.listen(3000);
console.log('Server running!');
	<!doctype html>
	<html>
	<head>
	<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
	<script type="text/javascript">
	$(document).ready(function () {
	$('#user-submit').click(function () {
	var payload = {
	name: $('#user-name').val(),
	msg: $('#user-msg').val()
	};

	$.ajax({
	url: "/users",
	type: "POST",
	contentType: "application/json",
	processData: false,
	data: JSON.stringify(payload),
	complete: function (data) {
	$('#output').html(data.responseText);
	}
	});
	});

	$('#left-submit').click(function () {
	var url = "/messages/" + $('#left-name').val();

	$.ajax({
	url: url,
	complete: function (data) {
	$('#output').html(data.responseText);
	}
	});
	});
	});
	</script>
	</head>
	<body>
	<h3>Enter a username and message to enter into the database:</h3>
	<input id="user-name" type="text" placeholder="Username"/>
	<input id="user-msg" type="text" placeholder="Message"/>
	<input id="user-submit" type="submit" />
	<h3>Enter a username to get the message they left:</h3>
	<input id="left-name" type="text" placeholder="Username"/>
	<input id="left-submit" type="submit" />
	<p id="output"></p>
	</body>
	</html>
	var express = require('express'),
	Y = require('yui/cache');

	var app = module.exports = express();

	// Database setup

	var db = new Y.Cache({max: 5});

	// Configuration

	app.use(express.bodyParser());

	// Main route sends our HTML file

	app.get('/', function(req, res) {
	res.sendfile(__dirname + '/index.html');
	});

	// Get our messages

	app.get('/messages/:user', function (req, res) {
	var data = db.retrieve(req.params.user);
	res.send(req.params.user + ' said: ' + data.response);
	});

	// Update database

	app.post('/users', function (req, res) {
	db.add(req.body.name, req.body.msg);
	res.send(req.body.name + ' was added to the database');
	});

	// Begin listening

	app.listen(3000);
	console.log('Server running!');