Node + SoundCloud = XML Playlist

playlist.js

//MUSIC
app.get('/playlist', function(req, res){

  var artist = "artistName";
  var key = "1234567yourKeyHere";

  var url = "http://api.soundcloud.com/users/" + artist + "/tracks.json?consumer_key=" + key;
  var response = [];
  
  var options = {
    host: 'api.soundcloud.com',
    port: 80,
    path: "/users/" + artist + "/tracks.json?consumer_key=" + key,
    method: 'GET'
  };

  var req = http.request(options, function(res) {

    res.setEncoding('utf8');
    res.on('data', function(chunk) {
      response += chunk;
    });
    
    res.on('end', function () {
      renderStack(response);
    
    }); 
     
  });

  req.on('error', function(e) {
    console.log('problem with request: ' + e.message);
  });


     
  function renderStack(txt) {
  
      var j = JSON.parse(txt);
      var count = j.length;
      var stack = [];
      
      for(var i = 0; i < count; i++) {
       
        stack.push([
          j[i]['title'],
          j[i]['uri'] + "/stream?oauth_consumer_key=" + key,
          j[i]['artwork_url']
        ]);
      
      }
    
    
      res.contentType('text/xml');
      res.render('playlist',{
         stack: stack
      });

  }

  req.end(); 

});