XMLHttpRequest Listener

RequestListener.js

var XMLHttpRequest = window.XMLHttpRequest;

function RequestListener(objParameters) {
  var self = this
    , realRequest = this.realRequest = new XMLHttpRequest(objParameters)
    ;

  realRequest.onload = function() {
    if (self.onload) {
      self.onload.apply(realRequest, arguments);
    }

    return self;
  };

  realRequest.onerror = function() {
    if (self.onerror !== null) {
      self.onerror.apply(realRequest, arguments);
    }

    return self;
  };
}

RequestListener.prototype = {
  get status() {
    return this.realRequest.status;
  },
  get statusText() {
    return this.realRequest.statusText;
  },
  get response() {
    return this.realRequest.response;
  },
  get responseText() {
    return this.realRequest.responseText;
  },
  get responseType() {
    return this.realRequest.responseType;
  },
  get responseXML() {
    return this.realRequest.responseXML;
  },
  send: function() {
    this.realRequest.send();

    return this;
  },
  open: function(method, url, async, user, password) {
    this.realRequest.open(method, url, async, user, password);

    return this;
  },
  setRequestHeader: function(name, value) {
    this.realRequest.setRequestHeader(name, value);

    return this;
  },
  getAllResponseHeaders: function() {
    return this.realRequest.getAllResponseHeaders();
  },
  abort: function() {
    this.realRequest.abort();

    return this;
  }
};

window.XMLHttpRequest = RequestListener;