extracting opengraph metadata serverside

extract-opengraph.js

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);
            });
        }
    });
}