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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.


Built from https://develop.svn.wordpress.org/trunk@37944


git-svn-id: http://core.svn.wordpress.org/trunk@37885 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Gary Pendergast 2016-07-04 04:02:31 +00:00
parent e5fcbb3514
commit 2d6b9ca91b
3 changed files with 1 additions and 4 deletions
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1
wp-admin/includes/ajax-actions.php
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@ -174,7 +174,6 @@ function wp_ajax_wp_compression_test() {
header( 'Expires: Wed, 11 Jan 1984 05:00:00 GMT' ); header( 'Expires: Wed, 11 Jan 1984 05:00:00 GMT' );
header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s' ) . ' GMT' ); header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s' ) . ' GMT' );
header( 'Cache-Control: no-cache, must-revalidate, max-age=0' ); header( 'Cache-Control: no-cache, must-revalidate, max-age=0' );
header( 'Pragma: no-cache' );
header('Content-Type: application/javascript; charset=UTF-8'); header('Content-Type: application/javascript; charset=UTF-8');
$force_gzip = ( defined('ENFORCE_GZIP') && ENFORCE_GZIP ); $force_gzip = ( defined('ENFORCE_GZIP') && ENFORCE_GZIP );
$test_str = '"wpCompressionTest Lorem ipsum dolor sit amet consectetuer mollis sapien urna ut a. Eu nonummy condimentum fringilla tempor pretium platea vel nibh netus Maecenas. Hac molestie amet justo quis pellentesque est ultrices interdum nibh Morbi. Cras mattis pretium Phasellus ante ipsum ipsum ut sociis Suspendisse Lorem. Ante et non molestie. Porta urna Vestibulum egestas id congue nibh eu risus gravida sit. Ac augue auctor Ut et non a elit massa id sodales. Elit eu Nulla at nibh adipiscing mattis lacus mauris at tempus. Netus nibh quis suscipit nec feugiat eget sed lorem et urna. Pellentesque lacus at ut massa consectetuer ligula ut auctor semper Pellentesque. Ut metus massa nibh quam Curabitur molestie nec mauris congue. Volutpat molestie elit justo facilisis neque ac risus Ut nascetur tristique. Vitae sit lorem tellus et quis Phasellus lacus tincidunt nunc Fusce. Pharetra wisi Suspendisse mus sagittis libero lacinia Integer consequat ac Phasellus. Et urna ac cursus tortor aliquam Aliquam amet tellus volutpat Vestibulum. Justo interdum condimentum In augue congue tellus sollicitudin Quisque quis nibh."'; $test_str = '"wpCompressionTest Lorem ipsum dolor sit amet consectetuer mollis sapien urna ut a. Eu nonummy condimentum fringilla tempor pretium platea vel nibh netus Maecenas. Hac molestie amet justo quis pellentesque est ultrices interdum nibh Morbi. Cras mattis pretium Phasellus ante ipsum ipsum ut sociis Suspendisse Lorem. Ante et non molestie. Porta urna Vestibulum egestas id congue nibh eu risus gravida sit. Ac augue auctor Ut et non a elit massa id sodales. Elit eu Nulla at nibh adipiscing mattis lacus mauris at tempus. Netus nibh quis suscipit nec feugiat eget sed lorem et urna. Pellentesque lacus at ut massa consectetuer ligula ut auctor semper Pellentesque. Ut metus massa nibh quam Curabitur molestie nec mauris congue. Volutpat molestie elit justo facilisis neque ac risus Ut nascetur tristique. Vitae sit lorem tellus et quis Phasellus lacus tincidunt nunc Fusce. Pharetra wisi Suspendisse mus sagittis libero lacinia Integer consequat ac Phasellus. Et urna ac cursus tortor aliquam Aliquam amet tellus volutpat Vestibulum. Justo interdum condimentum In augue congue tellus sollicitudin Quisque quis nibh."';

2
wp-includes/functions.php
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@ -1099,7 +1099,6 @@ function wp_get_nocache_headers() {
$headers = array( $headers = array(
'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT', 'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
'Cache-Control' => 'no-cache, must-revalidate, max-age=0', 'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
'Pragma' => 'no-cache',
); );
if ( function_exists('apply_filters') ) { if ( function_exists('apply_filters') ) {
@ -1115,7 +1114,6 @@ function wp_get_nocache_headers() {
* *
* @type string $Expires Expires header. * @type string $Expires Expires header.
* @type string $Cache-Control Cache-Control header. * @type string $Cache-Control Cache-Control header.
* @type string $Pragma Pragma header.
* } * }
*/ */
$headers = (array) apply_filters( 'nocache_headers', $headers ); $headers = (array) apply_filters( 'nocache_headers', $headers );

2
wp-includes/version.php
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@ -4,7 +4,7 @@
* *
* @global string $wp_version * @global string $wp_version
*/ */
$wp_version = '4.6-beta1-37943'; $wp_version = '4.6-beta1-37944';
/** /**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema. * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.