| 1 |
<?php |
| 2 |
|
| 3 |
if (!defined('ABSPATH')) die('No direct access allowed'); |
| 4 |
|
| 5 |
if (!class_exists('WP_Optimize_Load_Url_Task')) { |
| 6 |
require_once(WPO_PLUGIN_MAIN_PATH . 'cache/class-wpo-load-url-task.php'); |
| 7 |
} |
| 8 |
|
| 9 |
class WP_Optimize_Page_Cache_Preloader extends WP_Optimize_Preloader { |
| 10 |
|
| 11 |
/** |
| 12 |
* @var string |
| 13 |
*/ |
| 14 |
protected $preload_type = 'page_cache'; |
| 15 |
|
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/** |
| 17 |
* @var string |
| 18 |
*/ |
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protected $task_type = 'load-url-task'; |
| 20 |
|
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/** |
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* @var null | WP_Optimize_Page_Cache_Preloader |
| 23 |
*/ |
| 24 |
static protected $_instance = null; |
| 25 |
|
| 26 |
/** |
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* List of URLs for which a task will be created to preload them into cache |
| 28 |
* |
| 29 |
* @var array |
| 30 |
*/ |
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private $url_preload_list = array(); |
| 32 |
|
| 33 |
/** |
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* WP_Optimize_Page_Cache_Preloader constructor. |
| 35 |
*/ |
| 36 |
public function __construct() { |
| 37 |
parent::__construct(); |
| 38 |
|
| 39 |
add_action('wpo_page_cache_schedule_preload', array($this, 'run_scheduled_cache_preload')); |
| 40 |
add_action('wpo_page_cache_run_preload', array($this, 'run_preload_cron_job')); |
| 41 |
add_filter('wpo_preload_headers', array($this, 'preload_headers')); |
| 42 |
} |
| 43 |
|
| 44 |
/** |
| 45 |
* Check if cache is active. |
| 46 |
* |
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* @return bool |
| 48 |
*/ |
| 49 |
public function is_option_active() { |
| 50 |
return WP_Optimize()->get_page_cache()->is_enabled(); |
| 51 |
} |
| 52 |
|
| 53 |
/** |
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* Schedule or delete automatic preload action on cache settings update. |
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* |
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* @param array $new_settings The new settings |
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* @param array $previous_settings Settings before saving |
| 58 |
*/ |
| 59 |
public function cache_settings_updated($new_settings, $previous_settings) { |
| 60 |
if (!$new_settings['enable_page_caching']) { |
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wp_clear_scheduled_hook('wpo_page_cache_schedule_preload'); |
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wp_clear_scheduled_hook('wpo_page_cache_run_preload'); |
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$this->delete_preload_continue_action(); |
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return; |
| 65 |
} |
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|
| 67 |
if (!empty($new_settings['enable_schedule_preload'])) { |
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|
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$last_schedule_type = $previous_settings['preload_schedule_type']; |
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|
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$last_use_nighttime = (int) $this->options->get_option('page_cache_schedule_preload_nighttime'); |
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// By default, we schedule preload events to the nighttime. |
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$use_nighttime = apply_filters('wpo_page_cache_schedule_preload_use_nighttime', 1); |
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|
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$this->options->update_option('page_cache_schedule_preload_nighttime', $use_nighttime); |
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|
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if (wp_next_scheduled('wpo_page_cache_schedule_preload')) { |
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// if already scheduled this schedule type |
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if ($new_settings['preload_schedule_type'] === $last_schedule_type && ($last_use_nighttime === $use_nighttime)) { |
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// If the schedule type is cache lifespan, check if the cache lifespan changed. |
| 81 |
if ('wpo_use_cache_lifespan' === $new_settings['preload_schedule_type']) { |
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// Else, if the settings cache lifespan settings haven't changed, returns |
| 83 |
if ($new_settings['page_cache_length_value'] === $previous_settings['page_cache_length_value'] && $new_settings['page_cache_length_unit'] === $previous_settings['page_cache_length_unit']) { |
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return; |
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} |
| 86 |
} else { |
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return; |
| 88 |
} |
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} |
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// clear currently scheduled preload action. |
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wp_clear_scheduled_hook('wpo_page_cache_schedule_preload'); |
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} |
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|
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// schedule preload action. |
| 95 |
$timestamp = time() + $this->get_schedule_interval($new_settings['preload_schedule_type']); |
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|
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if ($use_nighttime) { |
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$timestamp = $this->make_nighttime($timestamp); |
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} |
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|
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wp_schedule_event($timestamp, $new_settings['preload_schedule_type'], 'wpo_page_cache_schedule_preload'); |
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} else { |
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wp_clear_scheduled_hook('wpo_page_cache_schedule_preload'); |
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} |
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|
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} |
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|
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/** |
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* Clear active preload tasks, reschedule preload action. |
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*/ |
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public function reschedule_preload() { |
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// clear scheduled action. |
| 113 |
if (wp_next_scheduled('wpo_page_cache_schedule_preload')) { |
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wp_clear_scheduled_hook('wpo_page_cache_schedule_preload'); |
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} |
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|
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// schedule preload action if need. |
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if ($this->is_scheduled_preload_enabled()) { |
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$preload_schedule_type = $this->get_cache_config('preload_schedule_type'); |
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// By default, we schedule preload events to the nighttime. |
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$use_nighttime = apply_filters('wpo_page_cache_schedule_preload_use_nighttime', 1); |
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|
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$timestamp = time() + $this->get_schedule_interval($preload_schedule_type); |
| 124 |
if ($use_nighttime) { |
| 125 |
$timestamp = $this->make_nighttime($timestamp); |
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} |
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|
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wp_schedule_event($timestamp, $preload_schedule_type, 'wpo_page_cache_schedule_preload'); |
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} |
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} |
| 131 |
|
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/** |
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* Reschedule preload action on plugin activation if page cache enabled. |
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* |
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* @return void |
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*/ |
| 137 |
public function maybe_reschedule_preload_on_activation() { |
| 138 |
if ($this->get_cache_config('enable_page_caching')) { |
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$this->reschedule_preload(); |
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} |
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} |
| 142 |
|
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/** |
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* Check if scheduled preload enabled. |
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* |
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* @return bool |
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*/ |
| 148 |
public function is_scheduled_preload_enabled() { |
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$enable_schedule_preload = $this->get_cache_config('enable_schedule_preload'); |
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return !empty($enable_schedule_preload); |
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} |
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|
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/** |
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* Check if we need run cache preload and run it. |
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*/ |
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public function run_scheduled_cache_preload() { |
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|
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$schedule_type = WPO_Cache_Config::instance()->get_option('preload_schedule_type'); |
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if (!$schedule_type) return; |
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|
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// Don't run preload if cache lifespan option enabled and cache not expired yet. |
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if ('wpo_use_cache_lifespan' === $schedule_type) { |
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|
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/** |
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* Filters the allowed time difference between the cache exiry and the current time, in seconds. |
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* If the cache expires in less than $allowed_time_difference, preload. Otherwise leave it. |
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* |
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* @param integer $allowed_time_difference The time difference, in seconds (default is same as changed time limit) |
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*/ |
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$time_limit = (defined('WP_OPTIMIZE_SET_TIME_LIMIT') && WP_OPTIMIZE_SET_TIME_LIMIT > 15) ? WP_OPTIMIZE_SET_TIME_LIMIT : 1800; |
| 171 |
|
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$allowed_time_difference = apply_filters('wpo_preload_allowed_time_difference', $time_limit); |
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$page_cache_lifespan = WPO_Cache_Config::instance()->get_option('page_cache_length', 0); |
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$last_preload_time = $this->options->get_option('wpo_last_page_cache_preload', 0); |
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$time_since_last_preload = time() - $last_preload_time; |
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$minimum_time_to_next_schedule_preload = $page_cache_lifespan - $allowed_time_difference; |
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// Skip this if the last preload is not as old as the cache lifespan minus $allowed_time_difference |
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if ($page_cache_lifespan > 0 && $time_since_last_preload < $minimum_time_to_next_schedule_preload) return; |
| 179 |
} |
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|
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$this->run(); |
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} |
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|
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/** |
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* Runs manual cache preload and reschedules if scheduled preload is enabled |
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* |
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* @return void |
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*/ |
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public function run_preload_cron_job() { |
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$wpo_page_cache = WP_Optimize()->get_page_cache(); |
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|
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if ($this->is_scheduled_preload_enabled()) { |
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$this->cancel_preload(); |
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$this->reschedule_preload(); |
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$this->run('scheduled', null, true); |
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} elseif ($wpo_page_cache->should_auto_preload_purged_contents()) { |
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$this->run('manual', null, true); |
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} |
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} |
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|
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/** |
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* Get cache config option value. |
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* |
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* @param string $option |
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* |
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* @return mixed |
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*/ |
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public function get_cache_config($option) { |
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static $config = null; |
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|
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if (null === $config) $config = WPO_Page_Cache::instance()->config->get(); |
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|
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if (is_array($config) && array_key_exists($option, $config)) { |
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return $config[$option]; |
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} |
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|
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return false; |
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} |
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|
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/** |
| 221 |
* Create tasks (WP_Optimize_Load_Url_Task) for preload all urls from site. |
| 222 |
* |
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* @param string $type The preload type (currently: scheduled, manual) |
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* @return void |
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*/ |
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public function create_tasks_for_preload_site_urls($type) { |
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$urls = $this->get_site_urls(); |
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|
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if (!empty($urls)) { |
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|
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$this->log(__('Creating tasks for preload site urls.', 'wp-optimize')); |
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|
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$wpo_cache_specific_urls_only = wpo_cache_specific_urls_only(); |
| 234 |
|
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foreach ($urls as $url) { |
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if (!$wpo_cache_specific_urls_only && wpo_url_in_exceptions($url)) continue; |
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|
| 238 |
if ($this->url_is_already_cached($url, $type)) { |
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continue; |
| 240 |
} |
| 241 |
|
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// this description is being used for internal purposes. |
| 243 |
$description = 'Preload - '.$url; |
| 244 |
$options = array('url' => $url, 'preload_type' => $type, 'anonymous_user_allowed' => (defined('DOING_CRON') && DOING_CRON) || (defined('WP_CLI') && WP_CLI)); |
| 245 |
|
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WP_Optimize_Load_Url_Task::create_task($this->task_type, $description, $options, 'WP_Optimize_Load_Url_Task'); |
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} |
| 248 |
|
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$this->log(__('Tasks for preload site urls created.', 'wp-optimize')); |
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} |
| 251 |
} |
| 252 |
|
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/** |
| 254 |
* Preload mobile version from $url. |
| 255 |
* |
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* @param string $url |
| 257 |
* |
| 258 |
* @return void |
| 259 |
*/ |
| 260 |
public function preload_mobile($url) { |
| 261 |
static $is_mobile_caching_enabled; |
| 262 |
if (!isset($is_mobile_caching_enabled)) { |
| 263 |
$is_mobile_caching_enabled = $this->get_cache_config('enable_mobile_caching'); |
| 264 |
} |
| 265 |
|
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// Only run if option is active |
| 267 |
if (!$is_mobile_caching_enabled) return; |
| 268 |
|
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$mobile_args = array( |
| 270 |
'httpversion' => '1.1', |
| 271 |
'user-agent' => WP_Optimize_Utils::get_user_agent('mobile'), |
| 272 |
'timeout' => 10, |
| 273 |
'headers' => apply_filters('wpo_preload_headers', array()), |
| 274 |
); |
| 275 |
|
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$mobile_args = apply_filters('wpo_page_cache_preloader_mobile_args', $mobile_args, $url); |
| 277 |
|
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$this->log('preload_mobile - ' . $url); |
| 279 |
|
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wp_remote_get($url, $mobile_args); |
| 281 |
} |
| 282 |
|
| 283 |
/** |
| 284 |
* Preload amp version from $url. |
| 285 |
* |
| 286 |
* @param string $url |
| 287 |
* |
| 288 |
* @return void |
| 289 |
*/ |
| 290 |
public function preload_amp($url) { |
| 291 |
if (!apply_filters('wpo_should_preload_amp', false, $url)) return; |
| 292 |
|
| 293 |
$amp_args = array( |
| 294 |
'httpversion' => '1.1', |
| 295 |
'user-agent' => WP_Optimize_Utils::get_user_agent(), |
| 296 |
'timeout' => 10, |
| 297 |
'headers' => array( |
| 298 |
'X-WP-Optimize-Cache-Preload' => 'Yes', |
| 299 |
), |
| 300 |
); |
| 301 |
|
| 302 |
$url = untrailingslashit($url) . '/amp/'; |
| 303 |
|
| 304 |
$amp_args = apply_filters('wpo_page_cache_preloader_amp_args', $amp_args, $url); |
| 305 |
|
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$this->log('preload_amp - ' . $url); |
| 307 |
|
| 308 |
wp_remote_get($url, $amp_args); |
| 309 |
} |
| 310 |
|
| 311 |
/** |
| 312 |
* Check if sitemap exists then returns list of urls from sitemap file otherwise returns all posts urls. |
| 313 |
* |
| 314 |
* @return array |
| 315 |
*/ |
| 316 |
public function get_site_urls() { |
| 317 |
|
| 318 |
$urls = $this->get_sitemap_urls(); |
| 319 |
|
| 320 |
if (!empty($urls)) { |
| 321 |
$this->options->update_option('wpo_last_page_cache_preload_type', 'sitemap'); |
| 322 |
} else { |
| 323 |
$urls = $this->get_post_urls(); |
| 324 |
$this->options->update_option('wpo_last_page_cache_preload_type', 'posts'); |
| 325 |
} |
| 326 |
|
| 327 |
// translators: %d: Number of URLs found |
| 328 |
$this->log(sprintf(_n('%d url found.', '%d urls found.', count($urls), 'wp-optimize'), count($urls))); |
| 329 |
|
| 330 |
/** |
| 331 |
* Filter the URLs which will be preloaded |
| 332 |
* |
| 333 |
* @param array $urls |
| 334 |
* @return array |
| 335 |
*/ |
| 336 |
$filtered_urls = apply_filters('wpo_preload_get_site_urls', $urls); |
| 337 |
return is_array($filtered_urls) ? $filtered_urls : $urls; |
| 338 |
} |
| 339 |
|
| 340 |
/** |
| 341 |
* Loads sitemap file and returns list of urls. |
| 342 |
* |
| 343 |
* @param string $sitemap_url |
| 344 |
* |
| 345 |
* @return array|bool |
| 346 |
*/ |
| 347 |
public function get_sitemap_urls($sitemap_url = '') { |
| 348 |
|
| 349 |
$urls = array(); |
| 350 |
|
| 351 |
// if sitemap url is empty then use main sitemap file name. |
| 352 |
$sitemap_url = ('' === $sitemap_url) ? site_url('/'.$this->get_sitemap_filename()) : $sitemap_url; |
| 353 |
|
| 354 |
// if simplexml_load_string not available then we don't load sitemap. |
| 355 |
if (!function_exists('simplexml_load_string')) { |
| 356 |
return $urls; |
| 357 |
} |
| 358 |
|
| 359 |
// load sitemap file. |
| 360 |
$response = wp_remote_get($sitemap_url, array('timeout' => 30)); |
| 361 |
|
| 362 |
// if we get error then |
| 363 |
// sometimes returns error due to timeout |
| 364 |
if (is_wp_error($response)) { |
| 365 |
$response = @file_get_contents($sitemap_url); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged -- suppress warnings when there is network error |
| 366 |
|
| 367 |
// if response is empty then try load from file. |
| 368 |
if (empty($response)) { |
| 369 |
$sitemap_file = $this->get_local_sitemap_file(); |
| 370 |
|
| 371 |
if (is_file($sitemap_file)) { |
| 372 |
$response = file_get_contents($sitemap_file); |
| 373 |
} |
| 374 |
} |
| 375 |
|
| 376 |
if (empty($response)) return $urls; |
| 377 |
|
| 378 |
$xml = @simplexml_load_string($response); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged -- suppress warnings when error found in XML data |
| 379 |
} else { |
| 380 |
// parse xml answer. |
| 381 |
$xml = @simplexml_load_string(wp_remote_retrieve_body($response)); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged -- suppress warnings when error found in XML data |
| 382 |
} |
| 383 |
|
| 384 |
// xml file has not valid xml content then return false. |
| 385 |
if (false === $xml) return false; |
| 386 |
|
| 387 |
// if exists urls then return them. |
| 388 |
if (isset($xml->url)) { |
| 389 |
foreach ($xml->url as $element) { |
| 390 |
if (!isset($element->loc)) continue; |
| 391 |
$urls[] = (string) $element->loc; |
| 392 |
} |
| 393 |
} elseif (isset($xml->sitemap)) { |
| 394 |
// if has links to other sitemap files then get urls from them. |
| 395 |
foreach ($xml->sitemap as $element) { |
| 396 |
if (!isset($element->loc)) continue; |
| 397 |
|
| 398 |
$sitemap_urls = $this->get_sitemap_urls($element->loc); |
| 399 |
|
| 400 |
if (is_array($sitemap_urls)) { |
| 401 |
$urls = array_merge($urls, $sitemap_urls); |
| 402 |
} |
| 403 |
} |
| 404 |
} |
| 405 |
|
| 406 |
return $urls; |
| 407 |
} |
| 408 |
|
| 409 |
/** |
| 410 |
* Get all posts of any post type and returns urls for them. |
| 411 |
* |
| 412 |
* @return array |
| 413 |
*/ |
| 414 |
public function get_post_urls() { |
| 415 |
global $post; |
| 416 |
|
| 417 |
$offset = 0; |
| 418 |
$posts_per_page = 1000; |
| 419 |
$urls = array(); |
| 420 |
|
| 421 |
$urls[] = site_url('/'); |
| 422 |
|
| 423 |
do { |
| 424 |
$query = new WP_Query(array( |
| 425 |
'post_type' => 'any', |
| 426 |
'post_status' => 'publish', |
| 427 |
'posts_per_page' => $posts_per_page, |
| 428 |
'offset' => $offset, |
| 429 |
'orderby' => 'ID', |
| 430 |
'order' => 'ASC', |
| 431 |
'cache_results' => false, // disable cache to avoid memory error. |
| 432 |
)); |
| 433 |
|
| 434 |
$posts_loaded = $query->post_count; |
| 435 |
|
| 436 |
while ($query->have_posts()) { |
| 437 |
$query->the_post(); |
| 438 |
$permalink = get_permalink(); |
| 439 |
$urls[] = $permalink; |
| 440 |
|
| 441 |
// check page separators in the post content |
| 442 |
preg_match_all('/\<\!--nextpage--\>/', $post->post_content, $matches); |
| 443 |
// if there any separators add urls for each page |
| 444 |
if (count($matches[0])) { |
| 445 |
$prefix = strpos($permalink, '?') ? '&page=' : ''; |
| 446 |
for ($page = 0; $page < count($matches[0]); $page++) { |
| 447 |
if ('' !== $prefix) { |
| 448 |
$urls[] = $permalink . $prefix . ($page+2); |
| 449 |
} else { |
| 450 |
$urls[] = trailingslashit($permalink) . ($page+2); |
| 451 |
} |
| 452 |
} |
| 453 |
} |
| 454 |
} |
| 455 |
|
| 456 |
$offset += $posts_loaded; |
| 457 |
} while ($posts_loaded > 0); |
| 458 |
|
| 459 |
/** |
| 460 |
* If domain mapping enabled then replace domains in urls. |
| 461 |
*/ |
| 462 |
if ($this->is_domain_mapping_enabled()) { |
| 463 |
$blog_id = get_current_blog_id(); |
| 464 |
|
| 465 |
$mapped_domain = $this->get_mapped_domain($blog_id); |
| 466 |
$blog_details = get_blog_details($blog_id); |
| 467 |
|
| 468 |
if ($mapped_domain) { |
| 469 |
foreach ($urls as $i => $url) { |
| 470 |
$urls[$i] = preg_replace('/'.$blog_details->domain.'/i', $mapped_domain, $url, 1); |
| 471 |
} |
| 472 |
} |
| 473 |
} |
| 474 |
|
| 475 |
wp_reset_postdata(); |
| 476 |
|
| 477 |
return $urls; |
| 478 |
} |
| 479 |
|
| 480 |
/** |
| 481 |
* Check if domain mapping enabled. |
| 482 |
* |
| 483 |
* @return bool |
| 484 |
*/ |
| 485 |
public function is_domain_mapping_enabled() { |
| 486 |
// SUNRISE constant is defined with installation WordPress MU Domain Mapping plugin. |
| 487 |
$enabled = is_multisite() && defined('SUNRISE') && 'on' === strtolower(SUNRISE); |
| 488 |
|
| 489 |
/** |
| 490 |
* Filters if Multisite Domain mapping is enabled. |
| 491 |
* Currently, we can only detect if the WordPress MU Domain Mapping plugin is in use. |
| 492 |
* Using the WP Core functionality should not require this, unless if the domain name is set somewhere else but in the site url option. |
| 493 |
*/ |
| 494 |
return apply_filters('wpo_is_domain_mapping_enabled', $enabled); |
| 495 |
} |
| 496 |
|
| 497 |
/** |
| 498 |
* Return mapped domain by $blog_id. |
| 499 |
* |
| 500 |
* @param int $blog_id |
| 501 |
* |
| 502 |
* @return string |
| 503 |
*/ |
| 504 |
public function get_mapped_domain($blog_id) { |
| 505 |
global $wpdb; |
| 506 |
|
| 507 |
$domain = ''; |
| 508 |
$multisite_plugin_table_name = $wpdb->base_prefix.'domain_mapping'; |
| 509 |
// Check if table exists |
| 510 |
if ($wpdb->get_var("SHOW TABLES LIKE '" . esc_sql($multisite_plugin_table_name) . "'") !== $multisite_plugin_table_name) { |
| 511 |
// This table created in WordPress MU Domain Mapping plugin. |
| 512 |
$row = $wpdb->get_row($wpdb->prepare("SELECT `domain` FROM " .esc_sql($multisite_plugin_table_name) . " WHERE `blog_id` = %d AND `active` = %d", $blog_id, 1), ARRAY_A); |
| 513 |
if (!empty($row)) { |
| 514 |
$domain = $row['domain']; |
| 515 |
} |
| 516 |
} else { |
| 517 |
// When using the WP Core method, the site url option contains the mapped domain. |
| 518 |
$domain = get_site_url($blog_id); |
| 519 |
} |
| 520 |
|
| 521 |
/** |
| 522 |
* Filters the mapped domain name |
| 523 |
* |
| 524 |
* @param string $domain The domain name |
| 525 |
* @param integer $blog_id The blog ID |
| 526 |
*/ |
| 527 |
return apply_filters('wpo_get_mapped_domain', $domain, $blog_id); |
| 528 |
} |
| 529 |
|
| 530 |
/** |
| 531 |
* Actually add the URLs to be preloaded into cache during `shutdown` hook |
| 532 |
* |
| 533 |
* @return void |
| 534 |
*/ |
| 535 |
public function create_tasks_for_auto_preload_urls() { |
| 536 |
$wpo_cache_specific_urls_only = wpo_cache_specific_urls_only(); |
| 537 |
foreach ($this->url_preload_list as $url) { |
| 538 |
if (!$wpo_cache_specific_urls_only && wpo_url_in_exceptions($url)) continue; |
| 539 |
|
| 540 |
$description = 'Preload - '.$url; |
| 541 |
$options = array('url' => $url, 'preload_type' => 'manual', 'anonymous_user_allowed' => (defined('DOING_CRON') && DOING_CRON) || (defined('WP_CLI') && WP_CLI)); |
| 542 |
|
| 543 |
WP_Optimize_Load_Url_Task::create_task($this->task_type, $description, $options, 'WP_Optimize_Load_Url_Task'); |
| 544 |
} |
| 545 |
|
| 546 |
$this->run('manual', null, true); |
| 547 |
} |
| 548 |
|
| 549 |
/** |
| 550 |
* Prepare the URL list that will need to be tasked to be preloaded |
| 551 |
* |
| 552 |
* @param string $url The URL to be preloaded |
| 553 |
* @return void |
| 554 |
*/ |
| 555 |
public function add_url_to_preload_list($url) { |
| 556 |
$this->url_preload_list[] = $url; |
| 557 |
} |
| 558 |
|
| 559 |
/** |
| 560 |
* Captures and logs any interesting messages |
| 561 |
* |
| 562 |
* @param string $message - the error message |
| 563 |
* @param string $error_type - the error type |
| 564 |
*/ |
| 565 |
public function log($message, $error_type = 'info') { |
| 566 |
|
| 567 |
if (isset($this->loggers)) { |
| 568 |
foreach ($this->loggers as $logger) { |
| 569 |
$logger->log($message, $error_type); |
| 570 |
} |
| 571 |
} |
| 572 |
} |
| 573 |
|
| 574 |
/** |
| 575 |
* Instance of WP_Optimize_Page_Cache_Preloader. |
| 576 |
* |
| 577 |
* @return WP_Optimize_Page_Cache_Preloader |
| 578 |
*/ |
| 579 |
public static function instance() { |
| 580 |
if (empty(self::$_instance)) { |
| 581 |
self::$_instance = new WP_Optimize_Page_Cache_Preloader(); |
| 582 |
} |
| 583 |
|
| 584 |
return self::$_instance; |
| 585 |
} |
| 586 |
|
| 587 |
/** |
| 588 |
* Check if the URL is already cached, or needs to be preloaded |
| 589 |
* |
| 590 |
* @param string $url The preloaded url |
| 591 |
* @param string $preload_type The preload type (manual | scheduled) |
| 592 |
* @return boolean |
| 593 |
*/ |
| 594 |
private function url_is_already_cached($url, $preload_type) { |
| 595 |
static $files = array(); |
| 596 |
$regenerate_count = 0; |
| 597 |
$folder = trailingslashit(WPO_CACHE_FILES_DIR) . wpo_get_url_path($url); |
| 598 |
// If the folder does not exist, consider the URL as cleared |
| 599 |
if (!is_dir($folder)) return false; |
| 600 |
|
| 601 |
if (empty($files)) { |
| 602 |
// Check only the base files |
| 603 |
$files[] = 'index.html'; |
| 604 |
|
| 605 |
if (WPO_Cache_Config::instance()->get_option('enable_mobile_caching')) { |
| 606 |
$files[] = 'mobile.index.html'; |
| 607 |
} |
| 608 |
$files = apply_filters('wpo_maybe_clear_files_list', $files); |
| 609 |
} |
| 610 |
|
| 611 |
foreach ($files as $file) { |
| 612 |
$file_path = trailingslashit($folder).$file; |
| 613 |
if (!file_exists($file_path)) { |
| 614 |
// The file does not exist, count it as "deleted" |
| 615 |
$regenerate_count++; |
| 616 |
continue; |
| 617 |
} |
| 618 |
|
| 619 |
if ($this->should_regenerate_file($file_path, $preload_type)) { |
| 620 |
// delete the expired cache file |
| 621 |
wp_delete_file($file_path); |
| 622 |
$regenerate_count++; |
| 623 |
} |
| 624 |
} |
| 625 |
|
| 626 |
// if 0 == $regenerate_count, nothing all the expected files exist, and none were deleted. |
| 627 |
return 0 === $regenerate_count; |
| 628 |
} |
| 629 |
|
| 630 |
/** |
| 631 |
* Determine if a file should be regenerated |
| 632 |
* |
| 633 |
* @param string $path The file to check |
| 634 |
* @param string $preload_type The preload type (manual | scheduled) |
| 635 |
* |
| 636 |
* @return boolean |
| 637 |
*/ |
| 638 |
private function should_regenerate_file($path, $preload_type) { |
| 639 |
// Store the variables, as they'll be used for each file and each file |
| 640 |
static $is_preloader_scheduled = null; |
| 641 |
static $lifespan = null; |
| 642 |
static $schedule_type = null; |
| 643 |
static $schedule_interval = null; |
| 644 |
static $lifespan_expiry_threshold = null; |
| 645 |
static $always_regenerate_file_if_preload_is_manual = null; |
| 646 |
static $always_regenerate_file_if_preload_is_scheduled = null; |
| 647 |
static $regenerate_file_when_no_expiry_date = null; |
| 648 |
|
| 649 |
// Sets the variables once per request: |
| 650 |
if (null === $is_preloader_scheduled) { |
| 651 |
$is_preloader_scheduled = WPO_Cache_Config::instance()->get_option('enable_schedule_preload'); |
| 652 |
$schedule_type = WPO_Cache_Config::instance()->get_option('preload_schedule_type'); |
| 653 |
$lifespan = (int) WPO_Cache_Config::instance()->get_option('page_cache_length'); |
| 654 |
$schedule_interval = $this->get_schedule_interval($schedule_type); |
| 655 |
|
| 656 |
/** |
| 657 |
* Expiry threshold: the current file will be considered stale if within the threshold. Default: 600s (10min) |
| 658 |
*/ |
| 659 |
$lifespan_expiry_threshold = apply_filters('wpo_lifespan_expiry_threshold', 600); |
| 660 |
|
| 661 |
/** |
| 662 |
* Filters if a cache should systematically be regenerated when running a manual preload. Default: false |
| 663 |
*/ |
| 664 |
$always_regenerate_file_if_preload_is_manual = apply_filters('wpo_always_regenerate_file_if_preload_is_manual', false); |
| 665 |
|
| 666 |
/** |
| 667 |
* Filters if a cache should systematically be regenerated when running a scheduled preload. Default: false |
| 668 |
*/ |
| 669 |
$always_regenerate_file_if_preload_is_scheduled = apply_filters('wpo_always_regenerate_file_if_preload_is_scheduled', false); |
| 670 |
|
| 671 |
/** |
| 672 |
* Filters if a cache should systematically be regenerated when running a preload and no schedule is set, and cache does not expire. Default: true |
| 673 |
*/ |
| 674 |
$regenerate_file_when_no_expiry_date = apply_filters('wpo_regenerate_file_when_no_expiry_date', true); |
| 675 |
} |
| 676 |
|
| 677 |
if (($always_regenerate_file_if_preload_is_manual && 'manual' === $preload_type) || ($always_regenerate_file_if_preload_is_scheduled && 'scheduled' === $preload_type)) { |
| 678 |
$result = true; |
| 679 |
} else { |
| 680 |
|
| 681 |
$modified_time = (int) filemtime($path); |
| 682 |
|
| 683 |
// cache lifespan is set. |
| 684 |
if (0 !== $lifespan) { |
| 685 |
$expiry_time = $modified_time + $lifespan - $lifespan_expiry_threshold; |
| 686 |
$result = time() > $expiry_time; |
| 687 |
} elseif ($is_preloader_scheduled) { |
| 688 |
$expiry_time = $modified_time + $schedule_interval - $lifespan_expiry_threshold; |
| 689 |
$result = time() > $expiry_time; |
| 690 |
} else { |
| 691 |
$result = $regenerate_file_when_no_expiry_date; |
| 692 |
} |
| 693 |
|
| 694 |
} |
| 695 |
|
| 696 |
return apply_filters('wpo_preloader_should_regenerate_file', $result, $path, $preload_type); |
| 697 |
} |
| 698 |
|
| 699 |
/** |
| 700 |
* Add preloader headers |
| 701 |
* |
| 702 |
* @param array $headers Preload headers |
| 703 |
*/ |
| 704 |
public function preload_headers($headers) { |
| 705 |
$headers['X-WP-Optimize-Cache-Preload'] = 'Yes'; |
| 706 |
return $headers; |
| 707 |
} |
| 708 |
|
| 709 |
/** |
| 710 |
* Option disabled error message |
| 711 |
* |
| 712 |
* @return array |
| 713 |
*/ |
| 714 |
protected function get_option_disabled_error() { |
| 715 |
return array( |
| 716 |
'success' => false, |
| 717 |
'error' => __('Page cache is disabled.', 'wp-optimize') |
| 718 |
); |
| 719 |
} |
| 720 |
|
| 721 |
/** |
| 722 |
* Get preload already running error message |
| 723 |
* |
| 724 |
* @return array |
| 725 |
*/ |
| 726 |
protected function get_preload_already_running_error() { |
| 727 |
return array( |
| 728 |
'success' => false, |
| 729 |
'error' => __('Probably page cache preload is running already.', 'wp-optimize') |
| 730 |
); |
| 731 |
} |
| 732 |
|
| 733 |
/** |
| 734 |
* Returns preload data |
| 735 |
* |
| 736 |
* @return array |
| 737 |
*/ |
| 738 |
protected function get_preload_data() { |
| 739 |
return WP_Optimize()->get_page_cache()->get_cache_size(); |
| 740 |
} |
| 741 |
|
| 742 |
/** |
| 743 |
* Returns preloading message |
| 744 |
* |
| 745 |
* @param array $cache_size |
| 746 |
* |
| 747 |
* @return array |
| 748 |
*/ |
| 749 |
protected function get_preloading_message($cache_size) { |
| 750 |
return array( |
| 751 |
'done' => false, |
| 752 |
'message' => __('Loading URLs...', 'wp-optimize'), |
| 753 |
'size' => WP_Optimize()->format_size($cache_size['size']), |
| 754 |
'file_count' => $cache_size['file_count'] |
| 755 |
); |
| 756 |
} |
| 757 |
|
| 758 |
/** |
| 759 |
* Returns last preload message |
| 760 |
* |
| 761 |
* @param array $cache_size |
| 762 |
* @param string $last_preload_time_str |
| 763 |
* |
| 764 |
* @return array |
| 765 |
*/ |
| 766 |
protected function get_last_preload_message($cache_size, $last_preload_time_str) { |
| 767 |
return array( |
| 768 |
'done' => true, |
| 769 |
// translators: %s is the last preload time |
| 770 |
'message' => sprintf(__('Last preload finished at %s', 'wp-optimize'), $last_preload_time_str), |
| 771 |
'size' => WP_Optimize()->format_size($cache_size['size']), |
| 772 |
'file_count' => $cache_size['file_count'] |
| 773 |
); |
| 774 |
} |
| 775 |
|
| 776 |
/** |
| 777 |
* Returns preload success message |
| 778 |
* |
| 779 |
* @param array $cache_size |
| 780 |
* |
| 781 |
* @return array |
| 782 |
*/ |
| 783 |
protected function get_preload_success_message($cache_size) { |
| 784 |
return array( |
| 785 |
'done' => true, |
| 786 |
'size' => WP_Optimize()->format_size($cache_size['size']), |
| 787 |
'file_count' => $cache_size['file_count'] |
| 788 |
); |
| 789 |
} |
| 790 |
|
| 791 |
/** |
| 792 |
* Returns preload progress message |
| 793 |
* |
| 794 |
* @param array $cache_size |
| 795 |
* @param string $preloaded_message |
| 796 |
* @param int $preload_resuming_in |
| 797 |
* |
| 798 |
* @return array |
| 799 |
*/ |
| 800 |
protected function get_preload_progress_message($cache_size, $preloaded_message, $preload_resuming_in) { |
| 801 |
return array( |
| 802 |
'done' => false, |
| 803 |
'message' => $preloaded_message, |
| 804 |
'size' => WP_Optimize()->format_size($cache_size['size']), |
| 805 |
'file_count' => $cache_size['file_count'], |
| 806 |
'resume_in' => $preload_resuming_in |
| 807 |
); |
| 808 |
} |
| 809 |
|
| 810 |
/** |
| 811 |
* Shifts the given timestamp to nighttime. |
| 812 |
* |
| 813 |
* @param int $time |
| 814 |
* |
| 815 |
* @return int |
| 816 |
*/ |
| 817 |
private function make_nighttime($time) { |
| 818 |
|
| 819 |
$gmt_offset = WP_Optimize_Utils::get_gmt_offset(); |
| 820 |
|
| 821 |
// Set time to random time from 1 a.m. to 4:59 a.m. |
| 822 |
$random_time = sprintf('%02d:%02d', wp_rand(1, 4), wp_rand(0, 59)); |
| 823 |
$nighttime = strtotime(gmdate("Y-m-d {$random_time}:00", $time)) - $gmt_offset; |
| 824 |
|
| 825 |
if ($nighttime < time()) $nighttime += 24 * 3600; |
| 826 |
|
| 827 |
return $nighttime; |
| 828 |
} |
| 829 |
} |
| 830 |
|
