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<?php
/**
* The plugin purge class for X-LiteSpeed-Purge
*
* @since 1.1.3
* @since 2.2 Refactored. Changed access from public to private for most func and class variables.
*/
namespace LiteSpeed;
defined('WPINC') || exit();
class Purge extends Base
{
const LOG_TAG = '🧹';
protected $_pub_purge = array();
protected $_pub_purge2 = array();
protected $_priv_purge = array();
protected $_purge_related = false;
protected $_purge_single = false;
const X_HEADER = 'X-LiteSpeed-Purge';
const X_HEADER2 = 'X-LiteSpeed-Purge2';
const DB_QUEUE = 'queue';
const DB_QUEUE2 = 'queue2';
const TYPE_PURGE_ALL = 'purge_all';
const TYPE_PURGE_ALL_LSCACHE = 'purge_all_lscache';
const TYPE_PURGE_ALL_CSSJS = 'purge_all_cssjs';
const TYPE_PURGE_ALL_LOCALRES = 'purge_all_localres';
const TYPE_PURGE_ALL_CCSS = 'purge_all_ccss';
const TYPE_PURGE_ALL_UCSS = 'purge_all_ucss';
const TYPE_PURGE_ALL_LQIP = 'purge_all_lqip';
const TYPE_PURGE_ALL_AVATAR = 'purge_all_avatar';
const TYPE_PURGE_ALL_OBJECT = 'purge_all_object';
const TYPE_PURGE_ALL_OPCACHE = 'purge_all_opcache';
const TYPE_PURGE_FRONT = 'purge_front';
const TYPE_PURGE_UCSS = 'purge_ucss';
const TYPE_PURGE_FRONTPAGE = 'purge_frontpage';
const TYPE_PURGE_PAGES = 'purge_pages';
const TYPE_PURGE_ERROR = 'purge_error';
/**
* Init hooks
*
* @since 3.0
*/
public function init()
{
//register purge actions
$purge_post_events = array(
// 'edit_post',
// 'save_post',
'delete_post',
'wp_trash_post',
// 'clean_post_cache', // This will disable wc's not purge product when stock status not change setting
'wp_update_comment_count', // TODO: check if needed for non ESI
);
foreach ($purge_post_events as $event) {
// this will purge all related tags
add_action($event, array($this, 'purge_post'));
}
// Purge post only when status is/was publish
add_action('transition_post_status', array($this, 'purge_publish'), 10, 3);
add_action('wp_update_comment_count', array($this, 'purge_feeds'));
if ($this->conf(self::O_OPTM_UCSS)) {
add_action('edit_post', __NAMESPACE__ . '\Purge::purge_ucss');
}
}
/**
* Only purge publish related status post
*
* @since 3.0
* @access public
*/
public function purge_publish($new_status, $old_status, $post)
{
if ($new_status != 'publish' && $old_status != 'publish') {
return;
}
$this->purge_post($post->ID);
}
/**
* Handle all request actions from main cls
*
* @since 1.8
* @access public
*/
public function handler()
{
$type = Router::verify_type();
switch ($type) {
case self::TYPE_PURGE_ALL:
$this->_purge_all();
break;
case self::TYPE_PURGE_ALL_LSCACHE:
$this->_purge_all_lscache();
break;
case self::TYPE_PURGE_ALL_CSSJS:
$this->_purge_all_cssjs();
break;
case self::TYPE_PURGE_ALL_LOCALRES:
$this->_purge_all_localres();
break;
case self::TYPE_PURGE_ALL_CCSS:
$this->_purge_all_ccss();
break;
case self::TYPE_PURGE_ALL_UCSS:
$this->_purge_all_ucss();
break;
case self::TYPE_PURGE_ALL_LQIP:
$this->_purge_all_lqip();
break;
case self::TYPE_PURGE_ALL_AVATAR:
$this->_purge_all_avatar();
break;
case self::TYPE_PURGE_ALL_OBJECT:
$this->_purge_all_object();
break;
case self::TYPE_PURGE_ALL_OPCACHE:
$this->purge_all_opcache();
break;
case self::TYPE_PURGE_FRONT:
$this->_purge_front();
break;
case self::TYPE_PURGE_UCSS:
$this->_purge_ucss();
break;
case self::TYPE_PURGE_FRONTPAGE:
$this->_purge_frontpage();
break;
case self::TYPE_PURGE_PAGES:
$this->_purge_pages();
break;
case strpos($type, self::TYPE_PURGE_ERROR) === 0:
$this->_purge_error(substr($type, strlen(self::TYPE_PURGE_ERROR)));
break;
default:
break;
}
Admin::redirect();
}
/**
* Shortcut to purge all lscache
*
* @since 1.0.0
* @access public
*/
public static function purge_all($reason = false)
{
self::cls()->_purge_all($reason);
}
/**
* Purge all caches (lscache/op/oc)
*
* @since 2.2
* @access private
*/
private function _purge_all($reason = false)
{
// if ( defined( 'LITESPEED_CLI' ) ) {
// // Can't send, already has output, need to save and wait for next run
// self::update_option( self::DB_QUEUE, $curr_built );
// self::debug( 'CLI request, queue stored: ' . $curr_built );
// }
// else {
$this->_purge_all_lscache(true);
$this->_purge_all_cssjs(true);
$this->_purge_all_localres(true);
// $this->_purge_all_ccss( true );
// $this->_purge_all_lqip( true );
$this->_purge_all_object(true);
$this->purge_all_opcache(true);
// }
if (!is_string($reason)) {
$reason = false;
}
if ($reason) {
$reason = "( $reason )";
}
self::debug('Purge all ' . $reason, 3);
$msg = __('Purged all caches successfully.', 'litespeed-cache');
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed($msg);
do_action('litespeed_purged_all');
}
/**
* Alerts LiteSpeed Web Server to purge all pages.
*
* For multisite installs, if this is called by a site admin (not network admin),
* it will only purge all posts associated with that site.
*
* @since 2.2
* @access public
*/
private function _purge_all_lscache($silence = false)
{
$this->_add('*');
if (!$silence) {
$msg = __('Notified LiteSpeed Web Server to purge all LSCache entries.', 'litespeed-cache');
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed($msg);
}
}
/**
* Delete all critical css
*
* @since 2.3
* @access private
*/
private function _purge_all_ccss($silence = false)
{
do_action('litespeed_purged_all_ccss');
$this->cls('CSS')->rm_cache_folder('ccss');
$this->cls('Data')->url_file_clean('ccss');
if (!$silence) {
$msg = __('Cleaned all Critical CSS files.', 'litespeed-cache');
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed($msg);
}
}
/**
* Delete all unique css
*
* @since 2.3
* @access private
*/
private function _purge_all_ucss($silence = false)
{
do_action('litespeed_purged_all_ucss');
$this->cls('CSS')->rm_cache_folder('ucss');
$this->cls('Data')->url_file_clean('ucss');
if (!$silence) {
$msg = __('Cleaned all Unique CSS files.', 'litespeed-cache');
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed($msg);
}
}
/**
* Purge one UCSS by URL
*
* @since 4.5
* @access public
*/
public static function purge_ucss($post_id_or_url)
{
self::debug('Purge a single UCSS: ' . $post_id_or_url);
// If is post_id, generate URL
if (!preg_match('/\D/', $post_id_or_url)) {
$post_id_or_url = get_permalink($post_id_or_url);
}
$post_id_or_url = untrailingslashit($post_id_or_url);
$existing_url_files = Data::cls()->mark_as_expired($post_id_or_url, true);
if ($existing_url_files) {
// Add to UCSS Q
self::cls('UCSS')->add_to_q($existing_url_files);
}
}
/**
* Delete all LQIP images
*
* @since 3.0
* @access private
*/
private function _purge_all_lqip($silence = false)
{
do_action('litespeed_purged_all_lqip');
$this->cls('Placeholder')->rm_cache_folder('lqip');
if (!$silence) {
$msg = __('Cleaned all LQIP files.', 'litespeed-cache');
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed($msg);
}
}
/**
* Delete all avatar images
*
* @since 3.0
* @access private
*/
private function _purge_all_avatar($silence = false)
{
do_action('litespeed_purged_all_avatar');
$this->cls('Avatar')->rm_cache_folder('avatar');
if (!$silence) {
$msg = __('Cleaned all Gravatar files.', 'litespeed-cache');
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed($msg);
}
}
/**
* Delete all localized JS
*
* @since 3.3
* @access private
*/
private function _purge_all_localres($silence = false)
{
do_action('litespeed_purged_all_localres');
$this->_add(Tag::TYPE_LOCALRES);
if (!$silence) {
$msg = __('Cleaned all localized resource entries.', 'litespeed-cache');
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed($msg);
}
}
/**
* Alerts LiteSpeed Web Server to purge pages.
*
* @since 1.2.2
* @access private
*/
private function _purge_all_cssjs($silence = false)
{
if (defined('DOING_CRON') || defined('LITESPEED_DID_send_headers')) {
self::debug('❌ Bypassed cssjs delete as header sent (lscache purge after this point will fail) or doing cron');
return;
}
$this->_purge_all_lscache($silence); // Purge CSSJS must purge lscache too to avoid 404
do_action('litespeed_purged_all_cssjs');
Optimize::update_option(Optimize::ITEM_TIMESTAMP_PURGE_CSS, time());
$this->_add(Tag::TYPE_MIN);
$this->cls('CSS')->rm_cache_folder('css');
$this->cls('CSS')->rm_cache_folder('js');
$this->cls('Data')->url_file_clean('css');
$this->cls('Data')->url_file_clean('js');
// Clear UCSS queue as it used combined CSS to generate
$this->clear_q('ucss', true);
if (!$silence) {
$msg = __('Notified LiteSpeed Web Server to purge CSS/JS entries.', 'litespeed-cache');
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed($msg);
}
}
/**
* Purge opcode cache
*
* @since 1.8.2
* @access public
*/
public function purge_all_opcache($silence = false)
{
if (!Router::opcache_enabled()) {
self::debug('Failed to reset opcode cache due to opcache not enabled');
if (!$silence) {
$msg = __('Opcode cache is not enabled.', 'litespeed-cache');
Admin_Display::error($msg);
}
return false;
}
// Purge opcode cache
opcache_reset();
self::debug('Reset opcode cache');
if (!$silence) {
$msg = __('Reset the entire opcode cache successfully.', 'litespeed-cache');
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed($msg);
}
return true;
}
/**
* Purge object cache
*
* @since 3.4
* @access public
*/
public static function purge_all_object($silence = true)
{
self::cls()->_purge_all_object($silence);
}
/**
* Purge object cache
*
* @since 1.8
* @access private
*/
private function _purge_all_object($silence = false)
{
if (!defined('LSCWP_OBJECT_CACHE')) {
self::debug('Failed to flush object cache due to object cache not enabled');
if (!$silence) {
$msg = __('Object cache is not enabled.', 'litespeed-cache');
Admin_Display::error($msg);
}
return false;
}
do_action('litespeed_purged_all_object');
$this->cls('Object_Cache')->flush();
self::debug('Flushed object cache');
if (!$silence) {
$msg = __('Purge all object caches successfully.', 'litespeed-cache');
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed($msg);
}
return true;
}
/**
* Adds new public purge tags to the array of purge tags for the request.
*
* @since 1.1.3
* @access public
* @param mixed $tags Tags to add to the list.
*/
public static function add($tags, $purge2 = false)
{
self::cls()->_add($tags, $purge2);
}
/**
* Add tags to purge
*
* @since 2.2
* @access private
*/
private function _add($tags, $purge2 = false)
{
if (!is_array($tags)) {
$tags = array($tags);
}
$tags = $this->_prepend_bid($tags);
if (!array_diff($tags, $purge2 ? $this->_pub_purge2 : $this->_pub_purge)) {
return;
}
if ($purge2) {
$this->_pub_purge2 = array_merge($this->_pub_purge2, $tags);
$this->_pub_purge2 = array_unique($this->_pub_purge2);
} else {
$this->_pub_purge = array_merge($this->_pub_purge, $tags);
$this->_pub_purge = array_unique($this->_pub_purge);
}
self::debug('added ' . implode(',', $tags) . ($purge2 ? ' [Purge2]' : ''), 8);
// Send purge header immediately
$curr_built = $this->_build($purge2);
if (defined('LITESPEED_CLI')) {
// Can't send, already has output, need to save and wait for next run
self::update_option($purge2 ? self::DB_QUEUE2 : self::DB_QUEUE, $curr_built);
self::debug('CLI request, queue stored: ' . $curr_built);
} else {
@header($curr_built);
if (defined('DOING_CRON') || defined('LITESPEED_DID_send_headers') || apply_filters('litespeed_delay_purge', false)) {
self::update_option($purge2 ? self::DB_QUEUE2 : self::DB_QUEUE, $curr_built);
self::debug('Output existed, queue stored: ' . $curr_built);
}
self::debug($curr_built);
}
}
/**
* Adds new private purge tags to the array of purge tags for the request.
*
* @since 1.1.3
* @access public
* @param mixed $tags Tags to add to the list.
*/
public static function add_private($tags)
{
self::cls()->_add_private($tags);
}
/**
* Add private ESI tag to purge list
*
* @since 3.0
* @access public
*/
public static function add_private_esi($tag)
{
self::add_private(Tag::TYPE_ESI . $tag);
}
/**
* Add private all tag to purge list
*
* @since 3.0
* @access public
*/
public static function add_private_all()
{
self::add_private('*');
}
/**
* Add tags to private purge
*
* @since 2.2
* @access private
*/
private function _add_private($tags)
{
if (!is_array($tags)) {
$tags = array($tags);
}
$tags = $this->_prepend_bid($tags);
if (!array_diff($tags, $this->_priv_purge)) {
return;
}
self::debug('added [private] ' . implode(',', $tags), 3);
$this->_priv_purge = array_merge($this->_priv_purge, $tags);
$this->_priv_purge = array_unique($this->_priv_purge);
// Send purge header immediately
@header($this->_build());
}
/**
* Incorporate blog_id into purge tags for multisite
*
* @since 4.0
* @access private
* @param mixed $tags Tags to add to the list.
*/
private function _prepend_bid($tags)
{
if (in_array('*', $tags)) {
return array('*');
}
$curr_bid = is_multisite() ? get_current_blog_id() : '';
foreach ($tags as $k => $v) {
$tags[$k] = $curr_bid . '_' . $v;
}
return $tags;
}
/**
* Activate `purge related tags` for Admin QS.
*
* @since 1.1.3
* @access public
*/
public static function set_purge_related()
{
self::cls()->_purge_related = true;
}
/**
* Activate `purge single url tag` for Admin QS.
*
* @since 1.1.3
* @access public
*/
public static function set_purge_single()
{
self::cls()->_purge_single = true;
}
/**
* Purge frontend url
*
* @since 1.3
* @since 2.2 Renamed from `frontend_purge`; Access changed from public
* @access private
*/
private function _purge_front()
{
if (empty($_SERVER['HTTP_REFERER'])) {
exit('no referer');
}
$this->purge_url($_SERVER['HTTP_REFERER']);
do_action('litespeed_purged_front', $_SERVER['HTTP_REFERER']);
wp_redirect($_SERVER['HTTP_REFERER']);
exit();
}
/**
* Purge single UCSS
* @since 4.7
*/
private function _purge_ucss()
{
if (empty($_SERVER['HTTP_REFERER'])) {
exit('no referer');
}
$url_tag = empty($_GET['url_tag']) ? $_SERVER['HTTP_REFERER'] : $_GET['url_tag'];
self::debug('Purge ucss [url_tag] ' . $url_tag);
do_action('litespeed_purge_ucss', $url_tag);
$this->purge_url($_SERVER['HTTP_REFERER']);
wp_redirect($_SERVER['HTTP_REFERER']);
exit();
}
/**
* Alerts LiteSpeed Web Server to purge the front page.
*
* @since 1.0.3
* @since 2.2 Access changed from public to private, renamed from `_purge_front`
* @access private
*/
private function _purge_frontpage()
{
$this->_add(Tag::TYPE_FRONTPAGE);
if (LITESPEED_SERVER_TYPE !== 'LITESPEED_SERVER_OLS') {
$this->_add_private(Tag::TYPE_FRONTPAGE);
}
$msg = __('Notified LiteSpeed Web Server to purge the front page.', 'litespeed-cache');
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed($msg);
}
/**
* Alerts LiteSpeed Web Server to purge pages.
*
* @since 1.0.15
* @access private
*/
private function _purge_pages()
{
$this->_add(Tag::TYPE_PAGES);
$msg = __('Notified LiteSpeed Web Server to purge all pages.', 'litespeed-cache');
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed($msg);
}
/**
* Alerts LiteSpeed Web Server to purge error pages.
*
* @since 1.0.14
* @access private
*/
private function _purge_error($type = false)
{
$this->_add(Tag::TYPE_HTTP);
if (!$type || !in_array($type, array('403', '404', '500'))) {
return;
}
$this->_add(Tag::TYPE_HTTP . $type);
$msg = __('Notified LiteSpeed Web Server to purge error pages.', 'litespeed-cache');
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed($msg);
}
/**
* Callback to add purge tags if admin selects to purge selected category pages.
*
* @since 1.0.7
* @access public
*/
public function purge_cat($value)
{
$val = trim($value);
if (empty($val)) {
return;
}
if (preg_match('/^[a-zA-Z0-9-]+$/', $val) == 0) {
self::debug("$val cat invalid");
return;
}
$cat = get_category_by_slug($val);
if ($cat == false) {
self::debug("$val cat not existed/published");
return;
}
self::add(Tag::TYPE_ARCHIVE_TERM . $cat->term_id);
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed(sprintf(__('Purge category %s', 'litespeed-cache'), $val));
}
/**
* Callback to add purge tags if admin selects to purge selected tag pages.
*
* @since 1.0.7
* @access public
*/
public function purge_tag($val)
{
$val = trim($val);
if (empty($val)) {
return;
}
if (preg_match('/^[a-zA-Z0-9-]+$/', $val) == 0) {
self::debug("$val tag invalid");
return;
}
$term = get_term_by('slug', $val, 'post_tag');
if ($term == 0) {
self::debug("$val tag not exist");
return;
}
self::add(Tag::TYPE_ARCHIVE_TERM . $term->term_id);
!defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed(sprintf(__('Purge tag %s', 'litespeed-cache'), $val));
}
/**
* Callback to add purge tags if admin selects to purge selected urls.
*
* @since 1.0.7
* @access public
*/
public function purge_url($url, $purge2 = false, $quite = false)
{
$val = trim($url);
if (empty($val)) {
return;
}
if (strpos($val, '<') !== false) {
self::debug("$val url contains <");
return;
}
$val = Utility::make_relative($val);
$hash = Tag::get_uri_tag($val);
if ($hash === false) {
self::debug("$val url invalid");
return;
}
self::add($hash, $purge2);
!$quite && !defined('LITESPEED_PURGE_SILENT') && Admin_Display::succeed(sprintf(__('Purge url %s', 'litespeed-cache'), $val));
}
/**
* Purge a list of pages when selected by admin. This method will look at the post arguments to determine how and what to purge.
*
* @since 1.0.7
* @access public
*/
public function purge_list()
{
if (!isset($_REQUEST[Admin_Display::PURGEBYOPT_SELECT]) || !isset($_REQUEST[Admin_Display::PURGEBYOPT_LIST])) {
return;
}
$sel = $_REQUEST[Admin_Display::PURGEBYOPT_SELECT];
$list_buf = $_REQUEST[Admin_Display::PURGEBYOPT_LIST];
if (empty($list_buf)) {
return;
}
$list_buf = str_replace(',', "\n", $list_buf); // for cli
$list = explode("\n", $list_buf);
switch ($sel) {
case Admin_Display::PURGEBY_CAT:
$cb = 'purge_cat';
break;
case Admin_Display::PURGEBY_PID:
$cb = 'purge_post';
break;
case Admin_Display::PURGEBY_TAG:
$cb = 'purge_tag';
break;
case Admin_Display::PURGEBY_URL:
$cb = 'purge_url';
break;
default:
return;
}
array_map(array($this, $cb), $list);
// for redirection
$_GET[Admin_Display::PURGEBYOPT_SELECT] = $sel;
}
/**
* Purge ESI
*
* @since 3.0
* @access public
*/
public static function purge_esi($tag)
{
self::add(Tag::TYPE_ESI . $tag);
}
/**
* Purge a certain post type
*
* @since 3.0
* @access public
*/
public static function purge_posttype($post_type)
{
self::add(Tag::TYPE_ARCHIVE_POSTTYPE . $post_type);
self::add($post_type);
}
/**
* Purge all related tags to a post.
*
* @since 1.0.0
* @access public
*/
public function purge_post($pid)
{
$pid = intval($pid);
// ignore the status we don't care
if (!$pid || !in_array(get_post_status($pid), array('publish', 'trash', 'private', 'draft'))) {
return;
}
$purge_tags = $this->_get_purge_tags_by_post($pid);
if (!$purge_tags) {
return;
}
self::add($purge_tags);
if ($this->conf(self::O_CACHE_REST)) {
self::add(Tag::TYPE_REST);
}
// $this->cls( 'Control' )->set_stale();
}
/**
* Hooked to the load-widgets.php action.
* Attempts to purge a single widget from cache.
* If no widget id is passed in, the method will attempt to find the widget id.
*
* @since 1.1.3
* @access public
*/
public static function purge_widget($widget_id = null)
{
if (is_null($widget_id)) {
$widget_id = $_POST['widget-id'];
if (is_null($widget_id)) {
return;
}
}
self::add(Tag::TYPE_WIDGET . $widget_id);
self::add_private(Tag::TYPE_WIDGET . $widget_id);
}
/**
* Hooked to the wp_update_comment_count action.
* Purges the comment widget when the count is updated.
*
* @access public
* @since 1.1.3
* @global type $wp_widget_factory
*/
public static function purge_comment_widget()
{
global $wp_widget_factory;
if (!isset($wp_widget_factory->widgets['WP_Widget_Recent_Comments'])) {
return;
}
$recent_comments = $wp_widget_factory->widgets['WP_Widget_Recent_Comments'];
if (!is_null($recent_comments)) {
self::add(Tag::TYPE_WIDGET . $recent_comments->id);
self::add_private(Tag::TYPE_WIDGET . $recent_comments->id);
}
}
/**
* Purges feeds on comment count update.
*
* @since 1.0.9
* @access public
*/
public function purge_feeds()
{
if ($this->conf(self::O_CACHE_TTL_FEED) > 0) {
self::add(Tag::TYPE_FEED);
}
}
/**
* Purges all private cache entries when the user logs out.
*
* @access public
* @since 1.1.3
*/
public static function purge_on_logout()
{
self::add_private('*');
}
/**
* Generate all purge tags before output
*
* @access private
* @since 1.1.3
*/
private function _finalize()
{
// Make sure header output only run once
if (!defined('LITESPEED_DID_' . __FUNCTION__)) {
define('LITESPEED_DID_' . __FUNCTION__, true);
} else {
return;
}
do_action('litespeed_purge_finalize');
// Append unique uri purge tags if Admin QS is `PURGESINGLE`
if ($this->_purge_single) {
$this->_pub_purge[] = Tag::build_uri_tag(); // TODO: add private tag too
}
// Append related purge tags if Admin QS is `PURGE`
if ($this->_purge_related) {
// Before this, tags need to be finalized
$tags_related = Tag::output_tags();
// NOTE: need to remove the empty item `B1_` to avoid purging all
$tags_related = array_filter($tags_related);
if ($tags_related) {
$this->_pub_purge = array_merge($this->_pub_purge, $tags_related);
}
}
if (!empty($this->_pub_purge)) {
$this->_pub_purge = array_unique($this->_pub_purge);
}
if (!empty($this->_priv_purge)) {
$this->_priv_purge = array_unique($this->_priv_purge);
}
}
/**
* Gathers all the purge headers.
*
* This will collect all site wide purge tags as well as third party plugin defined purge tags.
*
* @since 1.1.0
* @access public
* @return string the built purge header
*/
public static function output()
{
$instance = self::cls();
$instance->_finalize();
return $instance->_build();
}
/**
* Build the current purge headers.
*
* @since 1.1.5
* @access private
* @return string the built purge header
*/
private function _build($purge2 = false)
{
if ($purge2) {
if (empty($this->_pub_purge2)) {
return;
}
} else {
if (empty($this->_pub_purge) && empty($this->_priv_purge)) {
return;
}
}
$purge_header = '';
// Handle purge2 @since 4.4.1
if ($purge2) {
$public_tags = $this->_append_prefix($this->_pub_purge2);
if (empty($public_tags)) {
return;
}
$purge_header = self::X_HEADER2 . ': public,';
if (Control::is_stale()) {
$purge_header .= 'stale,';
}
$purge_header .= implode(',', $public_tags);
return $purge_header;
}
$private_prefix = self::X_HEADER . ': private,';
if (!empty($this->_pub_purge)) {
$public_tags = $this->_append_prefix($this->_pub_purge);
if (empty($public_tags)) {
// If this ends up empty, private will also end up empty
return;
}
$purge_header = self::X_HEADER . ': public,';
if (Control::is_stale()) {
$purge_header .= 'stale,';
}
$purge_header .= implode(',', $public_tags);
$private_prefix = ';private,';
}
// Handle priv purge tags
if (!empty($this->_priv_purge)) {
$private_tags = $this->_append_prefix($this->_priv_purge, true);
$purge_header .= $private_prefix . implode(',', $private_tags);
}
return $purge_header;
}
/**
* Append prefix to an array of purge headers
*
* @since 1.1.0
* @access private
*/
private function _append_prefix($purge_tags, $is_private = false)
{
$curr_bid = is_multisite() ? get_current_blog_id() : '';
if (!in_array('*', $purge_tags)) {
$tags = array();
foreach ($purge_tags as $val) {
$tags[] = LSWCP_TAG_PREFIX . $val;
}
return $tags;
}
// Purge All need to check if need to reset crawler or not
if (!$is_private && $this->conf(self::O_CRAWLER)) {
Crawler::cls()->reset_pos();
}
if (defined('LSWCP_EMPTYCACHE') || $is_private) {
return array('*');
}
if (is_multisite() && !$this->_is_subsite_purge()) {
$blogs = Activation::get_network_ids();
if (empty($blogs)) {
self::debug('build_purge_headers: blog list is empty');
return '';
}
$tags = array();
foreach ($blogs as $blog_id) {
$tags[] = LSWCP_TAG_PREFIX . $blog_id . '_';
}
return $tags;
} else {
return array(LSWCP_TAG_PREFIX . $curr_bid . '_');
}
}
/**
* Check if this purge blongs to a subsite purge
*
* @since 4.0
*/
private function _is_subsite_purge()
{
if (!is_multisite()) {
return false;
}
if (is_network_admin()) {
return false;
}
if (defined('LSWCP_EMPTYCACHE')) {
return false;
}
// Would only use multisite and network admin except is_network_admin is false for ajax calls, which is used by wordpress updates v4.6+
if (Router::is_ajax() && (check_ajax_referer('updates', false, false) || check_ajax_referer('litespeed-purgeall-network', false, false))) {
return false;
}
return true;
}
/**
* Gets all the purge tags correlated with the post about to be purged.
*
* If the purge all pages configuration is set, all pages will be purged.
*
* This includes site wide post types (e.g. front page) as well as any third party plugin specific post tags.
*
* @since 1.0.0
* @access private
*/
private function _get_purge_tags_by_post($post_id)
{
// If this is a valid post we want to purge the post, the home page and any associated tags & cats
// If not, purge everything on the site.
$purge_tags = array();
if ($this->conf(self::O_PURGE_POST_ALL)) {
// ignore the rest if purge all
return array('*');
}
// now do API hook action for post purge
do_action('litespeed_api_purge_post', $post_id);
// post
$purge_tags[] = Tag::TYPE_POST . $post_id;
$post_status = get_post_status($post_id);
if (function_exists('is_post_status_viewable')) {
$viewable = is_post_status_viewable($post_status);
if ($viewable) {
$purge_tags[] = Tag::get_uri_tag(wp_make_link_relative(get_permalink($post_id)));
}
}
// for archive of categories|tags|custom tax
global $post;
$original_post = $post;
$post = get_post($post_id);
$post_type = $post->post_type;
global $wp_widget_factory;
// recent_posts
$recent_posts = isset($wp_widget_factory->widgets['WP_Widget_Recent_Posts']) ? $wp_widget_factory->widgets['WP_Widget_Recent_Posts'] : null;
if (!is_null($recent_posts)) {
$purge_tags[] = Tag::TYPE_WIDGET . $recent_posts->id;
}
// get adjacent posts id as related post tag
if ($post_type == 'post') {
$prev_post = get_previous_post();
$next_post = get_next_post();
if (!empty($prev_post->ID)) {
$purge_tags[] = Tag::TYPE_POST . $prev_post->ID;
self::debug('--------purge_tags prev is: ' . $prev_post->ID);
}
if (!empty($next_post->ID)) {
$purge_tags[] = Tag::TYPE_POST . $next_post->ID;
self::debug('--------purge_tags next is: ' . $next_post->ID);
}
}
if ($this->conf(self::O_PURGE_POST_TERM)) {
$taxonomies = get_object_taxonomies($post_type);
//self::debug('purge by post, check tax = ' . var_export($taxonomies, true));
foreach ($taxonomies as $tax) {
$terms = get_the_terms($post_id, $tax);
if (!empty($terms)) {
foreach ($terms as $term) {
$purge_tags[] = Tag::TYPE_ARCHIVE_TERM . $term->term_id;
}
}
}
}
if ($this->conf(self::O_CACHE_TTL_FEED)) {
$purge_tags[] = Tag::TYPE_FEED;
}
// author, for author posts and feed list
if ($this->conf(self::O_PURGE_POST_AUTHOR)) {
$purge_tags[] = Tag::TYPE_AUTHOR . get_post_field('post_author', $post_id);
}
// archive and feed of post type
// todo: check if type contains space
if ($this->conf(self::O_PURGE_POST_POSTTYPE)) {
if (get_post_type_archive_link($post_type)) {
$purge_tags[] = Tag::TYPE_ARCHIVE_POSTTYPE . $post_type;
$purge_tags[] = $post_type;
}
}
if ($this->conf(self::O_PURGE_POST_FRONTPAGE)) {
$purge_tags[] = Tag::TYPE_FRONTPAGE;
}
if ($this->conf(self::O_PURGE_POST_HOMEPAGE)) {
$purge_tags[] = Tag::TYPE_HOME;
}
if ($this->conf(self::O_PURGE_POST_PAGES)) {
$purge_tags[] = Tag::TYPE_PAGES;
}
if ($this->conf(self::O_PURGE_POST_PAGES_WITH_RECENT_POSTS)) {
$purge_tags[] = Tag::TYPE_PAGES_WITH_RECENT_POSTS;
}
// if configured to have archived by date
$date = $post->post_date;
$date = strtotime($date);
if ($this->conf(self::O_PURGE_POST_DATE)) {
$purge_tags[] = Tag::TYPE_ARCHIVE_DATE . date('Ymd', $date);
}
if ($this->conf(self::O_PURGE_POST_MONTH)) {
$purge_tags[] = Tag::TYPE_ARCHIVE_DATE . date('Ym', $date);
}
if ($this->conf(self::O_PURGE_POST_YEAR)) {
$purge_tags[] = Tag::TYPE_ARCHIVE_DATE . date('Y', $date);
}
// Set back to original post as $post_id might affecting the global $post value
$post = $original_post;
return array_unique($purge_tags);
}
/**
* The dummy filter for purge all
*
* @since 1.1.5
* @access public
* @param string $val The filter value
* @return string The filter value
*/
public static function filter_with_purge_all($val)
{
self::purge_all();
return $val;
}
}