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Cron spawning improvement, see #9005

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git-svn-id: https://develop.svn.wordpress.org/trunk@10521 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Andrew Ozz 2009-02-07 13:32:34 +00:00
parent 0603592697
commit ccaf039e0d
3 changed files with 63 additions and 56 deletions
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30
wp-cron.php
View File

@ -11,27 +11,31 @@
ignore_user_abort(true);
if ( !empty($_POST) || defined('DOING_AJAX') || defined('DOING_CRON') )
die();
/**
* Tell WordPress we are doing the CRON task.
*
* @var bool
*/
define('DOING_CRON', true);
/** Setup WordPress environment */
require_once('./wp-load.php');
$local_time = time();
$crons = _get_cron_array();
$keys = array_keys( $crons );
if (!is_array($crons) || $keys[0] > $local_time) {
set_transient('doing_cron', 0);
return;
if ( !defined('ABSPATH') ) {
/** Setup WordPress environment */
require_once('./wp-load.php');
}
foreach ($crons as $timestamp => $cronhooks) {
if ( false === $crons = _get_cron_array() )
die();
$keys = array_keys( $crons );
$local_time = time();
if ( isset($keys[0]) && $keys[0] > $local_time )
die();
foreach ($crons as $timestamp => $cronhooks) {
if ( $timestamp > $local_time )
break;
@ -53,8 +57,4 @@ foreach ($crons as $timestamp => $cronhooks) {
}
}
set_transient('doing_cron', 0);
die();
?>

85
wp-includes/cron.php
View File

@ -160,7 +160,13 @@ function wp_next_scheduled( $hook, $args = array() ) {
*
* @return null Cron could not be spawned, because it is not needed to run.
*/
function spawn_cron( $local_time ) {
function spawn_cron( $local_time = 0 ) {
if ( !$local_time )
$local_time = time();
if ( defined('DOING_CRON') || isset($_GET['doing_wp_cron']) )
return;
/*
* do not even start the cron if local server timer has drifted
@ -170,37 +176,50 @@ function spawn_cron( $local_time ) {
if ( !$timer_accurate )
return;
//sanity check
$crons = _get_cron_array();
if ( !is_array($crons) )
return;
$keys = array_keys( $crons );
$timestamp = $keys[0];
if ( $timestamp > $local_time )
return;
/*
* multiple processes on multiple web servers can run this code concurrently
* try to make this as atomic as possible by setting doing_cron switch
*/
$flag = get_transient('doing_cron');
// clean up potential invalid value resulted from various system chaos
if ( $flag != 0 ) {
if ( $flag > $local_time + 10*60 || $flag < $local_time - 10*60 ) {
set_transient('doing_cron', 0);
if ( $flag > $local_time + 10*60 )
$flag = 0;
}
}
//don't run if another process is currently running it
if ( $flag > $local_time )
// don't run if another process is currently running it or more than once every 60 sec.
if ( $flag + 60 > $local_time )
return;
set_transient( 'doing_cron', $local_time + 30 );
//sanity check
$crons = _get_cron_array();
if ( !is_array($crons) )
return;
add_action('wp_head', 'spawn_cron_request');
$keys = array_keys( $crons );
if ( isset($keys[0]) && $keys[0] > $local_time )
return;
if ( defined('ALTERNATE_WP_CRON') && ALTERNATE_WP_CRON ) {
if ( !empty($_POST) || defined('DOING_AJAX') )
return;
set_transient( 'doing_cron', $local_time );
ob_start();
wp_redirect( add_query_arg('doing_wp_cron', '', stripslashes($_SERVER['REQUEST_URI'])) );
echo ' ';
// flush any buffers and send the headers
while ( @ob_end_flush() );
flush();
@include_once(ABSPATH . 'wp-cron.php');
return;
}
set_transient( 'doing_cron', $local_time );
$cron_url = get_option( 'siteurl' ) . '/wp-cron.php?doing_wp_cron';
wp_remote_post( $cron_url, array('timeout' => 0.01, 'blocking' => false) );
}
/**
@ -213,19 +232,17 @@ function spawn_cron( $local_time ) {
function wp_cron() {
// Prevent infinite loops caused by lack of wp-cron.php
if ( strpos($_SERVER['REQUEST_URI'], '/wp-cron.php') !== false )
if ( strpos($_SERVER['REQUEST_URI'], '/wp-cron.php') !== false || ( defined('DISABLE_WP_CRON') && DISABLE_WP_CRON ) )
return;
$crons = _get_cron_array();
if ( !is_array($crons) )
return;
$keys = array_keys( $crons );
if ( isset($keys[0]) && $keys[0] > time() )
if ( false === $crons = _get_cron_array() )
return;
$local_time = time();
$keys = array_keys( $crons );
if ( isset($keys[0]) && $keys[0] > $local_time )
return;
$schedules = wp_get_schedules();
foreach ( $crons as $timestamp => $cronhooks ) {
if ( $timestamp > $local_time ) break;
@ -370,14 +387,4 @@ function check_server_timer( $local_time ) {
return true;
}
function spawn_cron_request() {
?>
<script type="text/javascript">
/* <![CDATA[ */
window.setTimeout(function(){var x;if(window.XMLHttpRequest){x=new XMLHttpRequest();}else{try{x=new ActiveXObject('Msxml2.XMLHTTP');}catch(e){try{x=new ActiveXObject('Microsoft.XMLHTTP');}catch(e){};}}if(x){x.open('GET','<?php echo get_option('siteurl'); ?>/wp-cron.php?'+(new Date()).getTime(), true);x.send('');}},10);
/* ]]> */
</script>
<?php
}
?>

2
wp-includes/default-filters.php
View File

@ -176,7 +176,7 @@ add_action('wp_head', 'wp_print_head_scripts', 9);
add_action('wp_head', 'wp_generator');
add_action('wp_footer', 'wp_print_footer_scripts');
if(!defined('DOING_CRON'))
add_action('init', 'wp_cron');
add_action('sanitize_comment_cookies', 'wp_cron');
add_action('do_feed_rdf', 'do_feed_rdf', 10, 1);
add_action('do_feed_rss', 'do_feed_rss', 10, 1);
add_action('do_feed_rss2', 'do_feed_rss2', 10, 1);