Disallow qqq as interface language

Any page on translatewiki with param setlang=qqq times out. All messages
get parsed recursively until parser-template-loop-warning is reached.
uselang=qqq is already ignored, see RequestContext::sanitizeLangCode.

There is a counterpart to this patch in ULS, where it is changed
to use Language::isSupportedLanguage.

Bug: T104987
Change-Id: Ie77fe18681dfd5f9089fbaa8090dd9cc1c206da4

diff --git a/languages/Language.php b/languages/Language.php
index 93dd239..b698beb 100644 (file)
--- a/languages/Language.php
+++ b/languages/Language.php
@@ -254,10 +254,16 @@ class Language {
         * @since 1.21
         */
        public static function isSupportedLanguage( $code ) {
-               return self::isValidBuiltInCode( $code )
-                       && ( is_readable( self::getMessagesFileName( $code ) )
-                               || is_readable( self::getJsonMessagesFileName( $code ) )
-               );
+               if ( !self::isValidBuiltInCode( $code ) ) {
+                       return false;
+               }
+
+               if ( $code === 'qqq' ) {
+                       return false;
+               }
+
+               return is_readable( self::getMessagesFileName( $code ) ) ||
+                       is_readable( self::getJsonMessagesFileName( $code ) );
        }
 
        /**