Web components

<?php
// Load configuration
require_once('../config.php');
$config = Config::instance();
$webRoot = $config->webRoot();
 
// Read requset for DTD
$name = @$_GET['name'];
if (!isNameValid($name)) {
  // Script not found
  ClassFactory::importClass('Redirect');
  header('Content-type: text/html', true, 404);
  Redirect::redirect($webRoot.'/NavigationError-UnknownDTD', LangSelect::singleton()->getLang());
}
 
Header('Content-type: text/plain');
Header('Content-length: '.filesize($name));
readfile($name);
 
/**
 * @return Return true if request for DTD is valid.
 */
function isNameValid($name) {
  if (false === ereg('^[A-Za-z_][A-Za-z0-9_]*.dtd$', $name))
    return false;
  if (!file_exists($name))
    return false;
 
  return true;
}
?>