resourceloader: Add must-revalidate to Cache-Control

Bug: T105255
Change-Id: Ifdd32560335dee3bdd3a2844c8169e5b963b18c5

diff --git a/includes/resourceloader/ResourceLoader.php b/includes/resourceloader/ResourceLoader.php
index 508be2f..bf34c22 100644 (file)
--- a/includes/resourceloader/ResourceLoader.php
+++ b/includes/resourceloader/ResourceLoader.php
@@ -810,7 +810,7 @@ class ResourceLoader implements LoggerAwareInterface {
                        header( 'Cache-Control: private, no-cache, must-revalidate' );
                        header( 'Pragma: no-cache' );
                } else {
-                       header( "Cache-Control: public, max-age=$maxage, s-maxage=$smaxage" );
+                       header( "Cache-Control: public, must-revalidate, max-age=$maxage, s-maxage=$smaxage" );
                        $exp = min( $maxage, $smaxage );
                        header( 'Expires: ' . wfTimestamp( TS_RFC2822, $exp + time() ) );
                }