From 9d81cef5cc2a0a197a0223206ba3d9a687065886 Mon Sep 17 00:00:00 2001
From: Meitar Moscovitz <meitarm@gmail.com>
Date: Mon, 16 Feb 2009 15:45:18 +1100
Subject: [PATCH] Add framebusting JavaScript to help avoid clickjacking
 attacks.

---
 lib/action.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/action.php b/lib/action.php
index cd0db53999..48d5821a17 100644
--- a/lib/action.php
+++ b/lib/action.php
@@ -205,6 +205,9 @@ class Action extends HTMLOutputter // lawsuit
                 $this->element('script', array('type' => 'text/javascript',
                                                'src' => common_path('js/util.js?version='.LACONICA_VERSION)),
                                ' ');
+                // Frame-busting code to avoid clickjacking attacks.
+                $this->element('script', array('type' => 'text/javascript'),
+                               'if (window.top !== window.self) { window.top.location.href = window.self.location.href; }');
                 Event::handle('EndShowLaconicaScripts', array($this));
             }
             Event::handle('EndShowScripts', array($this));