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- Patch #566494 by Dave Reid, chx, JoshuaRogers, David_Rothstein, Rob Loach, TheRec, moshe weitzman: cron image does a full bootstrap on every page request so changing to a Javascript-based solution instead. Important performance fix -- what were we smoking? ;-)

merge-requests/26/head
Dries Buytaert 2009-12-15 08:45:32 +00:00
parent b792a6df2d
commit 2d6b6d492f
6 changed files with 104 additions and 80 deletions
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8
includes/common.inc
View File

@ -3082,7 +3082,7 @@ function base_path() {
* which on normal pages is up through the preprocess step of theme('html').
* Adding a link will overwrite a prior link with the exact same 'rel' and
* 'href' attributes.
*
*
* @param $attributes
* Associative array of element attributes including 'href' and 'rel'.
* @param $header
@ -3482,7 +3482,7 @@ function drupal_load_stylesheet_content($contents, $optimize = FALSE) {
$contents = preg_replace('{
(?<=\\\\\*/)([^/\*]+/\*)([^\*/]+\*/) # Add a backslash also at the end ie-mac hack comment, so the next pass will not touch it.
# The added backshlash does not affect the effectiveness of the hack.
}x', '\1\\\\\2', $contents);
}x', '\1\\\\\2', $contents);
$contents = preg_replace('<
\s*([@{}:;,]|\)\s|\s\()\s* | # Remove whitespace around separators, but keep space around parentheses.
/\*[^*\\\\]*\*+([^/*][^*]*\*+)*/ | # Remove comments that are not CSS hacks.
@ -4571,6 +4571,10 @@ function drupal_page_set_cache() {
$header_names = _drupal_set_preferred_header_name();
foreach (drupal_get_http_header() as $name_lower => $value) {
$cache->headers[$header_names[$name_lower]] = $value;
if ($name_lower == 'expires') {
// Use the actual timestamp from an Expires header if available.
$cache->expire = strtotime($value);
}
}
if ($cache->data) {

2
modules/system/system.admin.inc
View File

@ -1496,7 +1496,7 @@ function system_site_information_settings_submit($form, &$form_state) {
// Clear caches when the cron threshold is changed to ensure that the cron
// image is not contained in cached pages.
$cron_threshold = variable_get('cron_safe_threshold', DRUPAL_CRON_DEFAULT_THRESHOLD);
if (($cron_threshold > 0 && $form_state['input']['cron_safe_threshold'] == 0) || ($cron_threshold == 0 && $form_state['input']['cron_safe_threshold'] > 0)) {
if ($cron_threshold != $form_state['input']['cron_safe_threshold']) {
cache_clear_all();
}
}

20
modules/system/system.cron.js Normal file
View File

@ -0,0 +1,20 @@
// $Id$
(function ($) {
/**
* Checks to see if the cron should be automatically run.
*/
Drupal.behaviors.cronCheck = {
attach: function(context, settings) {
if (settings.cronCheck || false) {
$('body').once('cron-check', function() {
// Only execute the cron check if its the right time.
if (Math.round(new Date().getTime() / 1000.0) > settings.cronCheck) {
$.get(settings.basePath + 'system/run-cron-check');
}
});
}
}
};
})(jQuery);

1
modules/system/system.js
View File

@ -211,4 +211,3 @@ Drupal.behaviors.machineReadableValue = {
};
})(jQuery);

81
modules/system/system.module
View File

@ -190,9 +190,6 @@ function system_theme() {
'system_compact_link' => array(
'variables' => array(),
),
'system_run_cron_image' => array(
'variables' => array('image_path' => NULL),
),
'system_date_time_settings' => array(
'render element' => 'form',
'file' => 'system.admin.inc',
@ -530,10 +527,10 @@ function system_menu() {
'type' => MENU_CALLBACK,
'file' => 'system.admin.inc',
);
$items['system/run-cron-image'] = array(
$items['system/run-cron-check'] = array(
'title' => 'Execute cron',
'page callback' => 'system_run_cron_image',
'access callback' => 'system_run_cron_image_access',
'page callback' => 'system_run_cron_check',
'access callback' => 'system_run_cron_check_access',
'type' => MENU_CALLBACK,
'file' => 'system.admin.inc',
);
@ -2420,6 +2417,10 @@ function system_region_list($theme_key, $show = REGIONS_ALL) {
if (empty($list[$theme_key][$show])) {
$themes = list_themes();
if (!isset($themes[$theme_key])) {
$list[$theme_key][$show] = array();
return $list[$theme_key][$show];
}
$info = $themes[$theme_key]->info;
// If requested, suppress hidden regions. @see block_admin_display_form().
foreach ($info['regions'] as $name => $label) {
@ -3066,17 +3067,23 @@ function system_retrieve_file($url, $destination = NULL, $overwrite = TRUE) {
*/
function system_page_build(&$page) {
// Automatic cron runs.
// @see system_run_cron_image()
if (system_run_cron_image_access()) {
$cron_threshold = variable_get('cron_safe_threshold', DRUPAL_CRON_DEFAULT_THRESHOLD);
if ($cron_threshold) {
$page['page_bottom']['run_cron'] = array(
// Trigger cron run via AJAX.
'#attached' => array(
'js' => array(
'(function($){ $.get(' . drupal_json_encode(url('system/run-cron-image')) . '); })(jQuery);' => array('type' => 'inline', 'scope' => 'header'),
drupal_get_path('module', 'system') . '/system.cron.js' => array('weight' => JS_DEFAULT - 5),
array(
'data' => array(
// Add the timestamp for the next automatic cron run.
'cronCheck' => variable_get('cron_last', 0) + $cron_threshold,
),
'type' => 'setting',
),
),
),
// Trigger cron run for clients not supporting JavaScript (fall-back).
'#markup' => theme('system_run_cron_image', array('image_path' => 'system/run-cron-image')),
);
}
}
@ -3097,27 +3104,18 @@ function system_page_alter(&$page) {
}
/**
* Menu callback; executes cron via an image callback.
* Menu callback; executes cron via an AJAX callback.
*
* This callback runs cron in a separate HTTP request to prevent "mysterious"
* slow-downs of regular HTTP requests. It is either invoked via an AJAX request
* (if the client's browser supports JavaScript) or by an IMG tag directly in
* the page output (for clients not supporting JavaScript). For the latter case,
* we need to output a transparent 1x1 image, so the browser does not render the
* image's alternate text or a 'missing image placeholder'. The AJAX request
* slow-downs of regular HTTP requests. It is invoked via an AJAX request and
* does not process the returned output.
*
* @see system_page_alter()
* @see theme_system_run_cron_image()
* @see system_run_cron_image_access()
* @see system_run_cron_check_access()
*/
function system_run_cron_image() {
drupal_page_is_cacheable(FALSE);
// Output a transparent 1x1 image to the browser; required for clients not
// supporting JavaScript.
drupal_add_http_header('Content-Type', 'image/gif');
echo "\x47\x49\x46\x38\x39\x61\x1\x0\x1\x0\x80\xff\x0\xc0\xc0\xc0\x0\x0\x0\x21\xf9\x4\x1\x0\x0\x0\x0\x2c\x0\x0\x0\x0\x1\x0\x1\x0\x0\x2\x2\x44\x1\x0\x3b";
function system_run_cron_check() {
$cron_run = FALSE;
$cron_threshold = variable_get('cron_safe_threshold', DRUPAL_CRON_DEFAULT_THRESHOLD);
// Cron threshold semaphore is used to avoid errors every time the image
// callback is displayed when a previous cron is still running.
@ -3133,19 +3131,23 @@ function system_run_cron_image() {
}
}
else {
// Run cron automatically if it has never run or threshold was crossed.
$cron_last = variable_get('cron_last', NULL);
$cron_threshold = variable_get('cron_safe_threshold', DRUPAL_CRON_DEFAULT_THRESHOLD);
// Run cron automatically if it has never run or threshold was crossed.
if (!isset($cron_last) || (REQUEST_TIME - $cron_last > $cron_threshold)) {
// Lock cron threshold semaphore.
variable_set('cron_threshold_semaphore', REQUEST_TIME);
drupal_cron_run();
$cron_run = drupal_cron_run();
// Release the cron threshold semaphore.
variable_del('cron_threshold_semaphore');
}
}
drupal_exit();
// Add an expires header with the time of the next cron run.
$cron_last = variable_get('cron_last', NULL);
drupal_add_http_header('Expires', gmdate(DATE_RFC1123, $cron_last + $cron_threshold));
drupal_json_output(array('cron_run' => $cron_run));
drupal_page_footer();
}
/**
@ -3156,28 +3158,13 @@ function system_run_cron_image() {
* @return
* TRUE if cron threshold is enabled, FALSE otherwise.
*
* @see system_run_cron_image()
* @see system_run_cron_check()
* @see system_page_alter()
*/
function system_run_cron_image_access() {
function system_run_cron_check_access() {
return variable_get('cron_safe_threshold', DRUPAL_CRON_DEFAULT_THRESHOLD) > 0;
}
/**
* Display image used to run cron automatically.
*
* Renders an image pointing to the automatic cron run menu callback for
* graceful degradation when Javascript is not available. The wrapping NOSCRIPT
* tag ensures that only browsers not supporting JavaScript render the image.
*
* @see system_page_alter()
* @see system_run_cron_image()
* @ingroup themeable
*/
function theme_system_run_cron_image($variables) {
return '<noscript><div id="system-cron-image">' . theme('image', array('path' => $variables['image_path'], 'getsize' => FALSE)) . '</div></noscript>';
}
/**
* Get the list of available date types and attributes.
*

72
modules/system/system.test
View File

@ -415,47 +415,61 @@ class CronRunTestCase extends DrupalWebTestCase {
}
/**
* Follow every image paths in the previously retrieved content.
*/
function drupalGetAllImages() {
foreach ($this->xpath('//img') as $image) {
$this->drupalGet($this->getAbsoluteUrl($image['src']));
}
}
/**
* Ensure that the cron image callback to run it automatically is working.
* Ensure that the automatic cron run callback is working.
*
* In these tests we do not use REQUEST_TIME to track start time, because we
* need the exact time when cron is triggered.
*/
function testCronThreshold() {
function testAutomaticCron() {
// Ensure cron does not run when the cron threshold is enabled and was
// not passed.
$start_cron_last = time();
variable_set('cron_last', $start_cron_last);
variable_set('cron_safe_threshold', 10);
$cron_last = time();
$cron_safe_threshold = 100;
variable_set('cron_last', $cron_last);
variable_set('cron_safe_threshold', $cron_safe_threshold);
$this->drupalGet('');
// Follow every image path on the page.
$this->drupalGetAllImages();
$this->assertTrue($start_cron_last == variable_get('cron_last', NULL), t('Cron does not run when the cron threshold is not passed.'));
$this->assertRaw('"cronCheck":' . ($cron_last + $cron_safe_threshold));
$this->drupalGet('system/run-cron-check');
$this->assertExpiresHeader($cron_last + $cron_safe_threshold);
$this->assertTrue($cron_last == variable_get('cron_last', NULL), t('Cron does not run when the cron threshold is not passed.'));
// Test if cron runs when the cron threshold was passed.
$start_cron_last = time() - 15;
variable_set('cron_last', $start_cron_last);
$cron_last = time() - 200;
variable_set('cron_last', $cron_last);
$this->drupalGet('');
// Follow every image path on the page.
$this->drupalGetAllImages();
$this->assertTrue(variable_get('cron_last', NULL) > $start_cron_last, t('Cron runs when the cron threshold is passed.'));
$this->assertRaw('"cronCheck":' . ($cron_last + $cron_safe_threshold));
sleep(1);
$this->drupalGet('system/run-cron-check');
$this->assertExpiresHeader(variable_get('cron_last', NULL) + $cron_safe_threshold);
$this->assertTrue($cron_last < variable_get('cron_last', NULL), t('Cron runs when the cron threshold is passed.'));
// Test if cron does not run when the cron threshold was is disabled.
$start_cron_last = time() - 15;
variable_set('cron_safe_threshold', 0);
variable_set('cron_last', $start_cron_last);
// Disable the cron threshold through the interface.
$admin_user = $this->drupalCreateUser(array('administer site configuration'));
$this->drupalLogin($admin_user);
$this->drupalPost('admin/config/system/site-information', array('cron_safe_threshold' => 0), t('Save configuration'));
$this->assertText(t('The configuration options have been saved.'));
$this->drupalLogout();
// Test if cron does not run when the cron threshold is disabled.
$cron_last = time() - 200;
variable_set('cron_last', $cron_last);
$this->drupalGet('');
// Follow every image path on the page.
$this->drupalGetAllImages();
$this->assertTrue($start_cron_last == variable_get('cron_last', NULL), t('Cron does not run when the cron threshold is disabled.'));
$this->assertNoRaw('cronCheck');
$this->drupalGet('system/run-cron-check');
$this->assertResponse(403);
$this->assertTrue($cron_last == variable_get('cron_last', NULL), t('Cron does not run when the cron threshold is disabled.'));
}
/**
* Assert that the Expires header is a specific timestamp.
*
* @param $timestamp
* The timestamp value to match against the header.
*/
private function assertExpiresHeader($timestamp) {
$expires = $this->drupalGetHeader('Expires');
$expires = strtotime($expires);
$this->assertEqual($expires, $timestamp, t('Expires header expected @expected got @actual.', array('@expected' => $timestamp, '@actual' => $expires)));
}
/**