/**
* On every URL that generates a 404, we'll capture it here and see if we can
* find an old URL that it should be redirecting to.
*
* @param SS_HTTPResponse $request The request object
* @throws SS_HTTPResponse_Exception
*/
public function onBeforeHTTPError404($request)
{
// We need to get the URL ourselves because $request->allParams() only has a max of 4 params
$params = preg_split('|/+|', $request->getURL());
$getvars = $request->getVars();
unset($getvars['url']);
$page = self::find_old_page($params);
if ($page) {
$res = new SS_HTTPResponse();
$res->redirect(Controller::join_links($page, $getvars ? '?' . http_build_query($getvars) : null), 301);
throw new SS_HTTPResponse_Exception($res);
}
}
