Node.js wait until request is done
<p>I'm trying to make a simple app that requests some data from an API. I'm building it with express and I have the following code that does the request:</p>

<pre><code>module.exports = {
    getPrevMatches: function(){
        request({
            uri: 'http://worldcup.sfg.io/matches',
            json: true
        }, this.process);
    },
    process: function(error, response, body){
        if(response.statusCode === 200){
            return body;
        }
    }
}
</code></pre>

<p>And the following in my express script:</p>

<pre><code>app.get('/previous', function (req, res){
    var prevMatches = worldcup.getPrevMatches();

    console.log(prevMatches);

    res.render('prev.html', {
        prevMatches: prevMatches
    });
});
</code></pre>

<p>prevMatches is always undefined at this point. I thought that the request package would wait until, well, the request was finished and then proceed with my code. Is this not the case?</p>

<p>Thanks.</p>