fix(HTMLPurifier): set cache folder in folder cache/HTMLPurifier

Author: J9rem

includes/services/HtmlPurifierService.php

@@ -13,6 +13,8 @@
 
 class HtmlPurifierService
 {
+    public const HTMLPURIFIER_CACHE_FODLER = "cache/HTMLpurifier";
+
     protected $params;
     protected $wiki;
     private $purifier;
@@ -47,6 +49,13 @@ public function cleanHTML(string $dirty_html): string
                 '_top',
             ]);
 
+            // set the cache folder
+            // doc : http://htmlpurifier.org/live/configdoc/plain.html#Cache.SerializerPath
+            if (!is_dir(self::HTMLPURIFIER_CACHE_FODLER)) {
+                mkdir(self::HTMLPURIFIER_CACHE_FODLER, 0777, true);
+            }
+            $config->set('Cache.SerializerPath', realpath(self::HTMLPURIFIER_CACHE_FODLER));
+
             $this->purifier = new HTMLPurifier($config);
         }