From 143d1b31a87c3c6de34dadb2215132eb8e122066 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <fox@madoka.volgo-balt.ru>
Date: Thu, 16 Aug 2012 15:43:52 +0400
Subject: [PATCH] routing: check if created handler is a subclass of Handler

---
 backend.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/backend.php b/backend.php
index b670451a4..13568d165 100644
--- a/backend.php
+++ b/backend.php
@@ -136,7 +136,7 @@
 	if (class_exists($op)) {
 		$handler = new $op($link, $_REQUEST);
 
-		if ($handler) {
+		if ($handler && is_subclass_of($handler, 'Handler')) {
 			if (validate_csrf($csrf_token) || $handler->csrf_ignore($method)) {
 				if ($handler->before($method)) {
 					if ($method && method_exists($handler, $method)) {