app.js

/**
 * Module dependencies.
 */

var express = require('express'),
    jsdom = require('jsdom');

var app = module.exports = express.createServer();

// Configuration

app.configure(function(){
    app.set('views', __dirname + '/views');
    app.set('view engine', 'jade');
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(app.router);
    app.use(express.static(__dirname + '/public'));
});

app.configure('development', function(){
    app.use(express.errorHandler({ dumpExceptions: true, showStack: true })); 
});

app.configure('production', function(){
    app.use(express.errorHandler()); 
});

// Quick and dirty 

function extractOpenGraph(url, fn) {
    var og = [];
    jsdom.env({
        html: url,
        done: function(errors, window) {
            jsdom.jQueryify(window, 'http://code.jquery.com/jquery-1.4.2.min.js' , function() {
                window.$('meta[property^=og]').each(function(i, tem) {
                    og.push([ tem.getAttribute('property'), tem.getAttribute('content')]);
                });
                fn(og);
            });
        }
    });
}

// Routes

app.get('/', function(req, res){
    if (req.query.url) {
        var url = req.query.url;
        extractOpenGraph(url, function(data) {
            res.render('data', {
                title: "Results",
                data: data,
                url: url
            });
        });
    
    } else {
        res.render('index', {
            title: 'OG Parser'
        });
    }
});

var port = process.env.PORT || 3000;
app.listen(port);

console.log("Express server listening on port %d", app.address().port);