MDL-58119 files: Use immutable Cache-Control extension.

2017-07-15 00:18:48 +02:00
parent bcaee8da27
commit 2168357af1
10 changed files with 25 additions and 10 deletions
@@ -62,7 +62,7 @@ if ($allowcache) {
    // Set it to expire a year later. Note that this means we should never get
    // If-Modified-Since requests so there is no need to handle them specially.
    header('Expires: ' . date('r', time() + 365 * 24 * 3600));
-    header('Cache-Control: max-age=' . 365 * 24 * 3600);
+    header('Cache-Control: max-age=' . 365 * 24 * 3600 . ', immutable');
    // Pragma is set to no-cache by default so must be overridden.
    header('Pragma:');
 }