From b0e82d2cc4f97823083637215d292d8c5f94734a Mon Sep 17 00:00:00 2001
From: Peter Wilson <wilson@peterwilson.cc>
Date: Sat, 22 Jun 2019 11:13:51 +0000
Subject: [PATCH] Cron API: Prevent caching of WP Cron requests.

Add `Cache-Control` and `Expires` HTTP headers to prevent caching of requests to WP Cron on systems supporting fastcgi_finish_request().

The fastcgi_finish_request() call prevents the setting of further HTTP headers by caching plugins subsequently loaded.

Props kingkero.
Fixes 47396.


Built from https://develop.svn.wordpress.org/trunk@45560


git-svn-id: http://core.svn.wordpress.org/trunk@45371 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-cron.php             | 2 ++
 wp-includes/version.php | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/wp-cron.php b/wp-cron.php
index 1d848c3b35..7853e79e96 100644
--- a/wp-cron.php
+++ b/wp-cron.php
@@ -20,6 +20,8 @@ ignore_user_abort( true );
 
 /* Don't make the request block till we finish, if possible. */
 if ( function_exists( 'fastcgi_finish_request' ) && version_compare( phpversion(), '7.0.16', '>=' ) ) {
+	header( 'Expires: Wed, 11 Jan 1984 05:00:00 GMT' );
+	header( 'Cache-Control: no-cache, must-revalidate, max-age=0' );
 	fastcgi_finish_request();
 }
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index c7847b398f..80456a0e0e 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-45559';
+$wp_version = '5.3-alpha-45560';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.