mirror of
https://github.com/WordPress/WordPress.git
synced 2024-08-17 11:02:55 +02:00
This should make cron spawning faster on LSAPI by ensuring that cron requests return immediately. To avoid code repetition, the no caching headers are relocated and always sent. Caching plugins attempting to set these headers later will replace those set by WordPress Core. Follow up to [44488]. Props maximej, johnbillion. Fixes #54668. Built from https://develop.svn.wordpress.org/trunk@53653 git-svn-id: http://core.svn.wordpress.org/trunk@53212 1a063a9b-81f0-0310-95a4-ce76da25c4cd
155 lines
3.9 KiB
PHP
155 lines
3.9 KiB
PHP
<?php
|
|
/**
|
|
* A pseudo-cron daemon for scheduling WordPress tasks.
|
|
*
|
|
* WP-Cron is triggered when the site receives a visit. In the scenario
|
|
* where a site may not receive enough visits to execute scheduled tasks
|
|
* in a timely manner, this file can be called directly or via a server
|
|
* cron daemon for X number of times.
|
|
*
|
|
* Defining DISABLE_WP_CRON as true and calling this file directly are
|
|
* mutually exclusive and the latter does not rely on the former to work.
|
|
*
|
|
* The HTTP request to this file will not slow down the visitor who happens to
|
|
* visit when a scheduled cron event runs.
|
|
*
|
|
* @package WordPress
|
|
*/
|
|
|
|
ignore_user_abort( true );
|
|
|
|
if ( ! headers_sent() ) {
|
|
header( 'Expires: Wed, 11 Jan 1984 05:00:00 GMT' );
|
|
header( 'Cache-Control: no-cache, must-revalidate, max-age=0' );
|
|
}
|
|
|
|
/* Don't make the request block till we finish, if possible. */
|
|
if ( PHP_VERSION_ID >= 70016 && function_exists( 'fastcgi_finish_request' ) ) {
|
|
fastcgi_finish_request();
|
|
} elseif ( function_exists( 'litespeed_finish_request' ) ) {
|
|
litespeed_finish_request();
|
|
}
|
|
|
|
if ( ! empty( $_POST ) || defined( 'DOING_AJAX' ) || defined( 'DOING_CRON' ) ) {
|
|
die();
|
|
}
|
|
|
|
/**
|
|
* Tell WordPress we are doing the cron task.
|
|
*
|
|
* @var bool
|
|
*/
|
|
define( 'DOING_CRON', true );
|
|
|
|
if ( ! defined( 'ABSPATH' ) ) {
|
|
/** Set up WordPress environment */
|
|
require_once __DIR__ . '/wp-load.php';
|
|
}
|
|
|
|
/**
|
|
* Retrieves the cron lock.
|
|
*
|
|
* Returns the uncached `doing_cron` transient.
|
|
*
|
|
* @ignore
|
|
* @since 3.3.0
|
|
*
|
|
* @global wpdb $wpdb WordPress database abstraction object.
|
|
*
|
|
* @return string|int|false Value of the `doing_cron` transient, 0|false otherwise.
|
|
*/
|
|
function _get_cron_lock() {
|
|
global $wpdb;
|
|
|
|
$value = 0;
|
|
if ( wp_using_ext_object_cache() ) {
|
|
/*
|
|
* Skip local cache and force re-fetch of doing_cron transient
|
|
* in case another process updated the cache.
|
|
*/
|
|
$value = wp_cache_get( 'doing_cron', 'transient', true );
|
|
} else {
|
|
$row = $wpdb->get_row( $wpdb->prepare( "SELECT option_value FROM $wpdb->options WHERE option_name = %s LIMIT 1", '_transient_doing_cron' ) );
|
|
if ( is_object( $row ) ) {
|
|
$value = $row->option_value;
|
|
}
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
$crons = wp_get_ready_cron_jobs();
|
|
if ( empty( $crons ) ) {
|
|
die();
|
|
}
|
|
|
|
$gmt_time = microtime( true );
|
|
|
|
// The cron lock: a unix timestamp from when the cron was spawned.
|
|
$doing_cron_transient = get_transient( 'doing_cron' );
|
|
|
|
// Use global $doing_wp_cron lock, otherwise use the GET lock. If no lock, try to grab a new lock.
|
|
if ( empty( $doing_wp_cron ) ) {
|
|
if ( empty( $_GET['doing_wp_cron'] ) ) {
|
|
// Called from external script/job. Try setting a lock.
|
|
if ( $doing_cron_transient && ( $doing_cron_transient + WP_CRON_LOCK_TIMEOUT > $gmt_time ) ) {
|
|
return;
|
|
}
|
|
$doing_wp_cron = sprintf( '%.22F', microtime( true ) );
|
|
$doing_cron_transient = $doing_wp_cron;
|
|
set_transient( 'doing_cron', $doing_wp_cron );
|
|
} else {
|
|
$doing_wp_cron = $_GET['doing_wp_cron'];
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The cron lock (a unix timestamp set when the cron was spawned),
|
|
* must match $doing_wp_cron (the "key").
|
|
*/
|
|
if ( $doing_cron_transient !== $doing_wp_cron ) {
|
|
return;
|
|
}
|
|
|
|
foreach ( $crons as $timestamp => $cronhooks ) {
|
|
if ( $timestamp > $gmt_time ) {
|
|
break;
|
|
}
|
|
|
|
foreach ( $cronhooks as $hook => $keys ) {
|
|
|
|
foreach ( $keys as $k => $v ) {
|
|
|
|
$schedule = $v['schedule'];
|
|
|
|
if ( $schedule ) {
|
|
wp_reschedule_event( $timestamp, $schedule, $hook, $v['args'] );
|
|
}
|
|
|
|
wp_unschedule_event( $timestamp, $hook, $v['args'] );
|
|
|
|
/**
|
|
* Fires scheduled events.
|
|
*
|
|
* @ignore
|
|
* @since 2.1.0
|
|
*
|
|
* @param string $hook Name of the hook that was scheduled to be fired.
|
|
* @param array $args The arguments to be passed to the hook.
|
|
*/
|
|
do_action_ref_array( $hook, $v['args'] );
|
|
|
|
// If the hook ran too long and another cron process stole the lock, quit.
|
|
if ( _get_cron_lock() !== $doing_wp_cron ) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( _get_cron_lock() === $doing_wp_cron ) {
|
|
delete_transient( 'doing_cron' );
|
|
}
|
|
|
|
die();
|