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MDL-40563 fix race condition in debug styles when purging caches

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This commit is contained in:
Petr Škoda 2013-07-12 23:25:45 +02:00
parent ef201c966f
commit 2428de82b6
1 changed files with 17 additions and 8 deletions
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25
theme/styles_debug.php
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@ -22,6 +22,9 @@
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
// Disable moodle specific debug messages and any errors in output,
// comment out when debugging or better look into error log!
define('NO_DEBUG_DISPLAY', true);
define('ABORT_AFTER_CONFIG', true);
require('../config.php'); // this stops immediately at the beginning of lib/setup.php
@ -54,16 +57,22 @@ if ($usesvg) {
$candidatesheet = "$CFG->cachedir/theme/$themename/designer_nosvg.ser";
}
if (!file_exists($candidatesheet)) {
css_send_css_not_found();
$css = false;
if (is_readable($candidatesheet) and filemtime($candidatesheet) > time() - THEME_DESIGNER_CACHE_LIFETIME) {
$css = @unserialize(file_get_contents($candidatesheet));
}
if (!$css = file_get_contents($candidatesheet)) {
css_send_css_not_found();
}
if (!is_array($css)) {
// Ok, we need to start normal moodle script, we need to load all libs and $DB.
define('ABORT_AFTER_CONFIG_CANCEL', true);
$css = unserialize($css);
define('NO_MOODLE_COOKIES', true); // Session not used here.
define('NO_UPGRADE_CHECK', true); // Ignore upgrade check.
require("$CFG->dirroot/lib/setup.php");
$theme = theme_config::load($themename);
$css = $theme->css_content();
}
if ($type === 'editor') {
if (isset($css['editor'])) {
@ -112,4 +121,4 @@ if ($type === 'editor') {
css_send_uncached_css($css['theme'][$sheet]);
}
}
css_send_css_not_found();
css_send_css_not_found();