From 7a1fa1f91b60bd5dc86175d73c315bf9fad05129 Mon Sep 17 00:00:00 2001
From: Mikhail Golenkov <mikhailgolenkov@catalyst-au.net>
Date: Thu, 6 Feb 2020 18:02:59 +1100
Subject: [PATCH] Tweak regexp and exclude non-url entries #179.

---
 classes/local/controllers/maintenance_static_page_generator.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/classes/local/controllers/maintenance_static_page_generator.php b/classes/local/controllers/maintenance_static_page_generator.php
index 5164152..5cf0eba 100644
--- a/classes/local/controllers/maintenance_static_page_generator.php
+++ b/classes/local/controllers/maintenance_static_page_generator.php
@@ -148,7 +148,7 @@ class maintenance_static_page_generator {
         global $CFG;
 
         $contents = file_get_contents($filename);
-        if (!preg_match_all('#url\([\'"]?([^\'"\)]+)#', $contents, $matches)) {
+        if (!preg_match_all('#url\([\'"]?(?!data:)([^\'"\)]+)#', $contents, $matches)) {
             return;
         }
         foreach ($matches[1] as $originalurl) {