Changeset 37944

Timestamp:

07/04/2016 04:01:19 AM (8 years ago)

Author:

pento

Message:

General: Remove the Pragma header from responses.

Pragma is supposed to be a request header, but we've been including it in responses since the beginning of time.

This is a relic dating all the way back to b2, probably originally added because Internet Explorer version 5 and earlier didn't understand the Cache-Control header in responses, but they did (incorrectly) obey the Pragma header.

Internet Explorer 6 and 7 will obey the Pragma response header only if no other cache-related response headers are present (in our case, they are always present), and all other browsers ignore the Pragma response header.

Props geekysoft.
Fixes #37250.

Location:

trunk/src

Files:

• wp-admin/includes/ajax-actions.php (modified) (1 diff)
• wp-includes/functions.php (modified) (2 diffs)

trunk/src/wp-admin/includes/ajax-actions.php

@@ -175 +175 @@
         header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s' ) . ' GMT' );
         header( 'Cache-Control: no-cache, must-revalidate, max-age=0' );
-        header( 'Pragma: no-cache' );
         header('Content-Type: application/javascript; charset=UTF-8');
         $force_gzip = ( defined('ENFORCE_GZIP') && ENFORCE_GZIP );

trunk/src/wp-includes/functions.php

@@ -1100 +1100 @@
         'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
         'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
-        'Pragma' => 'no-cache',
     );
 
@@ -1116 +1115 @@
          *     @type string $Expires       Expires header.
          *     @type string $Cache-Control Cache-Control header.
-         *     @type string $Pragma        Pragma header.
          * }
          */