Sitemap XML cakePHP - Part 2

<?php

App::uses('Xml', 'Utility');

class SitemapController extends AppController {

  var $components = array('RequestHandler');
  var $helpers = array('Time');

  function index() {
    Configure::write('debug', 1);
    /* turn off browser caching */
    header("Expires: Mon, 20 Dec 1998 01:00:00 GMT");
    header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
    header("Cache-Control: no-cache, must-revalidate");
    header("Pragma: no-cache");
    header("Content-Type: text/xml");
    $this->RequestHandler->respondAs('xml');
  }

}

?>