Ember ajax wrapper

coffeescript

App.ajax = (url, settings)->
  deferred = $.Deferred()
  settings.xhr = ->
    xhr = $.ajaxSettings.xhr()
    if 'onprogress' of xhr
      context = this
      xhr.onprogress = (e)->
        Ember.run(deferred, deferred.notifyWith, context, [e.loaded/e.total])
    xhr
  jqXHR = $.ajax(url, settings)
  jqXHR.done ->
    Ember.run(deferred, deferred.resolveWith, this, arguments)
  jqXHR.fail ->
    Ember.run(deferred, deferred.rejectWith, this, arguments)
  deferred.promise()

javascript

App.ajax = function(url, settings) {
  var deferred, jqXHR;
  deferred = $.Deferred();
  settings.xhr = function() {
    var context, xhr;
    xhr = $.ajaxSettings.xhr();
    if ('onprogress' in xhr) {
      context = this;
      xhr.onprogress = function(e) {
        return Ember.run(deferred, deferred.notifyWith, context, [e.loaded / e.total]);
      };
    }
    return xhr;
  };
  jqXHR = $.ajax(url, settings);
  jqXHR.done(function() {
    return Ember.run(deferred, deferred.resolveWith, this, arguments);
  });
  jqXHR.fail(function() {
    return Ember.run(deferred, deferred.rejectWith, this, arguments);
  });
  return deferred.promise();
};