Javascript array element not changing

I am working through learnyounode from NodeSchool.

In this problem we are provided with three URLs as the first three command-line arguments. We must collect the complete content provided to us by each of the URLs and print it to the console (stdout). We don't need to print out the length, just the data as a String; one line per URL. The catch is that we must print them out in the same order as the URLs are provided to us as command-line arguments.

Here is my current attempt at a solution, however, there seems to be an issue. The program enters an infinite loop, and I can not figure out why. It appears that the Promise objects in the promiseQueue do not seem to update themselves upon their corresponding response.on('end', ...). Any help would be much appreciated.

var http = require('http');

// Wraps an http GET request.
// Three attributes
//    - data : String
//    - resolved : boolean
//    - error : Error
function Promise(url) {
  this.resolved = false;
  this.error = null;
  this.data = '';

  var self = this;
  http.get(url, function(response) {
    response.setEncoding('utf8');
    response.on('data', function(data) {
      self.data += data;
    });
    response.on('error', function(error) {
      self.error = error;
      self.resolved = true;
    });
    response.on('end', function() {
      self.resolved = true;
    });
  });
}

var urls = process.argv.slice(2);
var promiseQueue = urls.map(function(url) {
  return new Promise(url);
});

var promise;
while (promiseQueue.length) {
  if (promiseQueue[0].resolved) {
    promise = promiseQueue.shift();
    console.log(promise.data);
  }
}