From c234a70476ce4b210fc922f6bf1d61d0a5af16db Mon Sep 17 00:00:00 2001
From: Nathan Nguyen <nathannguyen@catalyst-au.net>
Date: Fri, 16 Nov 2018 10:40:08 +1100
Subject: [PATCH] Fix problem with loading stylesheet in preview mode

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

diff --git a/lib.php b/lib.php
index dfda31a..9a11d89 100644
--- a/lib.php
+++ b/lib.php
@@ -75,7 +75,7 @@ function auth_outage_get_climaintenance_resource_file($file) {
 
     // Protect against path traversal attacks.
     $basename = basename($file);
-    if ($basename !== $file) {
+    if ($basename !== $file && $file !== 'preview/' . $basename) {
         // @codingStandardsIgnoreStart
         if (!PHPUNIT_TEST) {
             error_log('Possible attempt for Path Traversal Attack (only filename expected): '.$file);