<?php

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/**

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* The object cache class

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*

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* @since 1.8

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* @package LiteSpeed

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* @subpackage LiteSpeed/inc

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* @author LiteSpeed Technologies <info@litespeedtech.com>

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*/

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namespace LiteSpeed;

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defined('WPINC') || exit();

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require_once dirname(__DIR__) . '/autoload.php';

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class Object_Cache extends Root

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{

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const O_DEBUG = 'debug';

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const O_OBJECT = 'object';

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const O_OBJECT_KIND = 'object-kind';

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const O_OBJECT_HOST = 'object-host';

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const O_OBJECT_PORT = 'object-port';

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const O_OBJECT_LIFE = 'object-life';

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const O_OBJECT_PERSISTENT = 'object-persistent';

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const O_OBJECT_ADMIN = 'object-admin';

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const O_OBJECT_TRANSIENTS = 'object-transients';

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const O_OBJECT_DB_ID = 'object-db_id';

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const O_OBJECT_USER = 'object-user';

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const O_OBJECT_PSWD = 'object-pswd';

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const O_OBJECT_GLOBAL_GROUPS = 'object-global_groups';

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const O_OBJECT_NON_PERSISTENT_GROUPS = 'object-non_persistent_groups';

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private $_conn;

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private $_cfg_debug;

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private $_cfg_enabled;

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private $_cfg_method;

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private $_cfg_host;

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private $_cfg_port;

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private $_cfg_life;

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private $_cfg_persistent;

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private $_cfg_admin;

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private $_cfg_transients;

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private $_cfg_db;

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private $_cfg_user;

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private $_cfg_pswd;

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private $_default_life = 360;

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private $_oc_driver = 'Memcached'; // Redis or Memcached

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private $_global_groups = array();

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private $_non_persistent_groups = array();

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/**

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* Init

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*

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* NOTE: this class may be included without initialized core

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*

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* @since 1.8

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*/

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public function __construct($cfg = false)

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{

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$this->debug_oc('-------------');

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$this->debug_oc('init');

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if ($cfg) {

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if (!is_array($cfg[Base::O_OBJECT_GLOBAL_GROUPS])) {

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$cfg[Base::O_OBJECT_GLOBAL_GROUPS] = explode("\n", $cfg[Base::O_OBJECT_GLOBAL_GROUPS]);

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}

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if (!is_array($cfg[Base::O_OBJECT_NON_PERSISTENT_GROUPS])) {

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$cfg[Base::O_OBJECT_NON_PERSISTENT_GROUPS] = explode("\n", $cfg[Base::O_OBJECT_NON_PERSISTENT_GROUPS]);

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}

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$this->_cfg_debug = $cfg[Base::O_DEBUG] ? $cfg[Base::O_DEBUG] : false;

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$this->_cfg_method = $cfg[Base::O_OBJECT_KIND] ? true : false;

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$this->_cfg_host = $cfg[Base::O_OBJECT_HOST];

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$this->_cfg_port = $cfg[Base::O_OBJECT_PORT];

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$this->_cfg_life = $cfg[Base::O_OBJECT_LIFE];

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$this->_cfg_persistent = $cfg[Base::O_OBJECT_PERSISTENT];

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$this->_cfg_admin = $cfg[Base::O_OBJECT_ADMIN];

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$this->_cfg_transients = $cfg[Base::O_OBJECT_TRANSIENTS];

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$this->_cfg_db = $cfg[Base::O_OBJECT_DB_ID];

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$this->_cfg_user = $cfg[Base::O_OBJECT_USER];

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$this->_cfg_pswd = $cfg[Base::O_OBJECT_PSWD];

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$this->_global_groups = $cfg[Base::O_OBJECT_GLOBAL_GROUPS];

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$this->_non_persistent_groups = $cfg[Base::O_OBJECT_NON_PERSISTENT_GROUPS];

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if ($this->_cfg_method) {

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$this->_oc_driver = 'Redis';

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}

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$this->_cfg_enabled = $cfg[Base::O_OBJECT] && class_exists($this->_oc_driver) && $this->_cfg_host;

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$this->debug_oc('init with cfg result : ', $this->_cfg_enabled);

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}

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// If OC is OFF, will hit here to init OC after conf initialized

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elseif (defined('LITESPEED_CONF_LOADED')) {

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$this->_cfg_debug = $this->conf(Base::O_DEBUG) ? $this->conf(Base::O_DEBUG) : false;

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$this->_cfg_method = $this->conf(Base::O_OBJECT_KIND) ? true : false;

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$this->_cfg_host = $this->conf(Base::O_OBJECT_HOST);

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$this->_cfg_port = $this->conf(Base::O_OBJECT_PORT);

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$this->_cfg_life = $this->conf(Base::O_OBJECT_LIFE);

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$this->_cfg_persistent = $this->conf(Base::O_OBJECT_PERSISTENT);

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$this->_cfg_admin = $this->conf(Base::O_OBJECT_ADMIN);

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$this->_cfg_transients = $this->conf(Base::O_OBJECT_TRANSIENTS);

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$this->_cfg_db = $this->conf(Base::O_OBJECT_DB_ID);

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$this->_cfg_user = $this->conf(Base::O_OBJECT_USER);

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$this->_cfg_pswd = $this->conf(Base::O_OBJECT_PSWD);

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$this->_global_groups = $this->conf(Base::O_OBJECT_GLOBAL_GROUPS);

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$this->_non_persistent_groups = $this->conf(Base::O_OBJECT_NON_PERSISTENT_GROUPS);

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if ($this->_cfg_method) {

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$this->_oc_driver = 'Redis';

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}

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$this->_cfg_enabled = $this->conf(Base::O_OBJECT) && class_exists($this->_oc_driver) && $this->_cfg_host;

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} elseif (defined('self::CONF_FILE') && file_exists(WP_CONTENT_DIR . '/' . self::CONF_FILE)) {

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// Get cfg from _data_file

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// Use self::const to avoid loading more classes

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$cfg = \json_decode(file_get_contents(WP_CONTENT_DIR . '/' . self::CONF_FILE), true);

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if (!empty($cfg[self::O_OBJECT_HOST])) {

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$this->_cfg_debug = !empty($cfg[Base::O_DEBUG]) ? $cfg[Base::O_DEBUG] : false;

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$this->_cfg_method = !empty($cfg[self::O_OBJECT_KIND]) ? $cfg[self::O_OBJECT_KIND] : false;

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$this->_cfg_host = $cfg[self::O_OBJECT_HOST];

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$this->_cfg_port = $cfg[self::O_OBJECT_PORT];

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$this->_cfg_life = !empty($cfg[self::O_OBJECT_LIFE]) ? $cfg[self::O_OBJECT_LIFE] : $this->_default_life;

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$this->_cfg_persistent = !empty($cfg[self::O_OBJECT_PERSISTENT]) ? $cfg[self::O_OBJECT_PERSISTENT] : false;

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$this->_cfg_admin = !empty($cfg[self::O_OBJECT_ADMIN]) ? $cfg[self::O_OBJECT_ADMIN] : false;

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$this->_cfg_transients = !empty($cfg[self::O_OBJECT_TRANSIENTS]) ? $cfg[self::O_OBJECT_TRANSIENTS] : false;

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$this->_cfg_db = !empty($cfg[self::O_OBJECT_DB_ID]) ? $cfg[self::O_OBJECT_DB_ID] : 0;

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$this->_cfg_user = !empty($cfg[self::O_OBJECT_USER]) ? $cfg[self::O_OBJECT_USER] : '';

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$this->_cfg_pswd = !empty($cfg[self::O_OBJECT_PSWD]) ? $cfg[self::O_OBJECT_PSWD] : '';

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$this->_global_groups = !empty($cfg[self::O_OBJECT_GLOBAL_GROUPS]) ? $cfg[self::O_OBJECT_GLOBAL_GROUPS] : array();

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$this->_non_persistent_groups = !empty($cfg[self::O_OBJECT_NON_PERSISTENT_GROUPS]) ? $cfg[self::O_OBJECT_NON_PERSISTENT_GROUPS] : array();

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if ($this->_cfg_method) {

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$this->_oc_driver = 'Redis';

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}

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$this->_cfg_enabled = class_exists($this->_oc_driver) && $this->_cfg_host;

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} else {

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$this->_cfg_enabled = false;

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}

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} else {

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$this->_cfg_enabled = false;

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}

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}

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/**

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* Add debug.

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*

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* @since 6.3

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* @access private

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*/

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private function debug_oc($text, $show_error = false)

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{

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if (defined('LSCWP_LOG')) {

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Debug2::debug($text);

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return;

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}

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if (!$show_error && !$this->_cfg_debug) {

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return;

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}

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error_log(gmdate('m/d/y H:i:s') . ' - ' . $text . PHP_EOL, 3, WP_CONTENT_DIR . '/debug.log');

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}

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/**

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* Get `Store Transients` setting value

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*

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* @since 1.8.3

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* @access public

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*/

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public function store_transients($group)

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{

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return $this->_cfg_transients && $this->_is_transients_group($group);

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}

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/**

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* Check if the group belongs to transients or not

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*

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* @since 1.8.3

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* @access private

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*/

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private function _is_transients_group($group)

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{

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return in_array($group, array('transient', 'site-transient'));

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}

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/**

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* Update WP object cache file config

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*

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* @since 1.8

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* @access public

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*/

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public function update_file($options)

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{

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$changed = false;

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// NOTE: When included in oc.php, `LSCWP_DIR` will show undefined, so this must be assigned/generated when used

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$_oc_ori_file = LSCWP_DIR . 'lib/object-cache.php';

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$_oc_wp_file = WP_CONTENT_DIR . '/object-cache.php';

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// Update cls file

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if (!file_exists($_oc_wp_file) || md5_file($_oc_wp_file) !== md5_file($_oc_ori_file)) {

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$this->debug_oc('copying object-cache.php file to ' . $_oc_wp_file);

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copy($_oc_ori_file, $_oc_wp_file);

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$changed = true;

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}

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/**

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* Clear object cache

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*/

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if ($changed) {

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$this->_reconnect($options);

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}

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}

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/**

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* Remove object cache file

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*

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* @since 1.8.2

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* @access public

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*/

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public function del_file()

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{

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// NOTE: When included in oc.php, `LSCWP_DIR` will show undefined, so this must be assigned/generated when used

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$_oc_ori_file = LSCWP_DIR . 'lib/object-cache.php';

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$_oc_wp_file = WP_CONTENT_DIR . '/object-cache.php';

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if (file_exists($_oc_wp_file) && md5_file($_oc_wp_file) === md5_file($_oc_ori_file)) {

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$this->debug_oc('removing ' . $_oc_wp_file);

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unlink($_oc_wp_file);

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}

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}

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/**

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* Try to build connection

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*

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* @since 1.8

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* @access public

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*/

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public function test_connection()

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{

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return $this->_connect();

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}

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/**

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* Force to connect with this setting

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*

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* @since 1.8

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* @access private

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*/

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private function _reconnect($cfg)

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{

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$this->debug_oc('Reconnecting');

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if (isset($this->_conn)) {

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// error_log( 'Object: Quitting existing connection!' );

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$this->debug_oc('Quitting existing connection');

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$this->flush();

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$this->_conn = null;

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$this->cls(false, true);

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}

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$cls = $this->cls(false, false, $cfg);

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$cls->_connect();

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if (isset($cls->_conn)) {

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$cls->flush();

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}

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}

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/**

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* Connect to Memcached/Redis server

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*

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* @since 1.8

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* @access private

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*/

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private function _connect()

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{

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if (isset($this->_conn)) {

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// error_log( 'Object: _connected' );

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return true;

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}

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if (!class_exists($this->_oc_driver) || !$this->_cfg_host) {

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return null;

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}

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if (defined('LITESPEED_OC_FAILURE')) {

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return false;

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}

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$this->debug_oc('Init ' . $this->_oc_driver . ' connection');

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$this->debug_oc('connecting to ' . $this->_cfg_host . ':' . $this->_cfg_port);

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$failed = false;

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/**

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* Connect to Redis

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*

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* @since 1.8.1

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* @see https://github.com/phpredis/phpredis/#example-1

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*/

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if ($this->_oc_driver == 'Redis') {

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set_error_handler('litespeed_exception_handler');

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try {

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$this->_conn = new \Redis();

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// error_log( 'Object: _connect Redis' );

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if ($this->_cfg_persistent) {

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if ($this->_cfg_port) {

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$this->_conn->pconnect($this->_cfg_host, $this->_cfg_port);

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} else {

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$this->_conn->pconnect($this->_cfg_host);

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}

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} else {

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if ($this->_cfg_port) {

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$this->_conn->connect($this->_cfg_host, $this->_cfg_port);

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} else {

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$this->_conn->connect($this->_cfg_host);

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}

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}

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if ($this->_cfg_pswd) {

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if ($this->_cfg_user) {

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$this->_conn->auth(array($this->_cfg_user, $this->_cfg_pswd));

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} else {

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$this->_conn->auth($this->_cfg_pswd);

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}

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}

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if ($this->_cfg_db) {

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$this->_conn->select($this->_cfg_db);

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}

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$res = $this->_conn->ping();

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if ($res != '+PONG') {

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$failed = true;

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}

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} catch (\Exception $e) {

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$this->debug_oc('Redis connect exception: ' . $e->getMessage(), true);

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$failed = true;

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} catch (\ErrorException $e) {

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$this->debug_oc('Redis connect error: ' . $e->getMessage(), true);

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$failed = true;

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}

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restore_error_handler();

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} /**

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* Connect to Memcached

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*/ else {

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if ($this->_cfg_persistent) {

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$this->_conn = new \Memcached($this->_get_mem_id());

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// Check memcached persistent connection

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if ($this->_validate_mem_server()) {

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// error_log( 'Object: _validate_mem_server' );

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$this->debug_oc('Got persistent ' . $this->_oc_driver . ' connection');

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return true;

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}

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$this->debug_oc('No persistent ' . $this->_oc_driver . ' server list!');

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} else {

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// error_log( 'Object: new memcached!' );

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$this->_conn = new \Memcached();

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}

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$this->_conn->addServer($this->_cfg_host, (int) $this->_cfg_port);

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/**

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* Add SASL auth

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* @since 1.8.1

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* @since 2.9.6 Fixed SASL connection @see https://www.litespeedtech.com/support/wiki/doku.php/litespeed_wiki:lsmcd:new_sasl

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*/

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if ($this->_cfg_user && $this->_cfg_pswd && method_exists($this->_conn, 'setSaslAuthData')) {

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$this->_conn->setOption(\Memcached::OPT_BINARY_PROTOCOL, true);

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$this->_conn->setOption(\Memcached::OPT_COMPRESSION, false);

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$this->_conn->setSaslAuthData($this->_cfg_user, $this->_cfg_pswd);

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}

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// Check connection

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if (!$this->_validate_mem_server()) {

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$failed = true;

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}

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}

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// If failed to connect

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if ($failed) {

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$this->debug_oc('❌ Failed to connect ' . $this->_oc_driver . ' server!', true);

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$this->_conn = null;

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$this->_cfg_enabled = false;

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!defined('LITESPEED_OC_FAILURE') && define('LITESPEED_OC_FAILURE', true);

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// error_log( 'Object: false!' );

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return false;

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}

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$this->debug_oc('Connected');

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return true;

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}

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/**

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* Check if the connected memcached host is the one in cfg

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*

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* @since 1.8

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* @access private

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*/

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private function _validate_mem_server()

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{

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$mem_list = $this->_conn->getStats();

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if (empty($mem_list)) {

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return false;

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}

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foreach ($mem_list as $k => $v) {

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if (substr($k, 0, strlen($this->_cfg_host)) != $this->_cfg_host) {

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continue;

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}

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if (!empty($v['pid']) || !empty($v['curr_connections'])) {

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return true;

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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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* Get memcached unique id to be used for connecting

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*

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* @since 1.8

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* @access private

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*/

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private function _get_mem_id()

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{

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$mem_id = 'litespeed';

[430] Fix | Delete

if (is_multisite()) {

[431] Fix | Delete

$mem_id .= '_' . get_current_blog_id();

[432] Fix | Delete

}

[433] Fix | Delete

[434] Fix | Delete

return $mem_id;

[435] Fix | Delete

}

[436] Fix | Delete

[437] Fix | Delete

/**

[438] Fix | Delete

* Get cache

[439] Fix | Delete

*

[440] Fix | Delete

* @since 1.8

[441] Fix | Delete

* @access public

[442] Fix | Delete

*/

[443] Fix | Delete

public function get($key)

[444] Fix | Delete

{

[445] Fix | Delete

if (!$this->_cfg_enabled) {

[446] Fix | Delete

return null;

[447] Fix | Delete

}

[448] Fix | Delete

[449] Fix | Delete

if (!$this->_can_cache()) {

[450] Fix | Delete

return null;

[451] Fix | Delete

}

[452] Fix | Delete

[453] Fix | Delete

if (!$this->_connect()) {

[454] Fix | Delete

return null;

[455] Fix | Delete

}

[456] Fix | Delete

[457] Fix | Delete

$res = $this->_conn->get($key);

[458] Fix | Delete

[459] Fix | Delete

return $res;

[460] Fix | Delete

}

[461] Fix | Delete

[462] Fix | Delete

/**

[463] Fix | Delete

* Set cache

[464] Fix | Delete

*

[465] Fix | Delete

* @since 1.8

[466] Fix | Delete

* @access public

[467] Fix | Delete

*/

[468] Fix | Delete

public function set($key, $data, $expire)

[469] Fix | Delete

{

[470] Fix | Delete

if (!$this->_cfg_enabled) {

[471] Fix | Delete

return null;

[472] Fix | Delete

}

[473] Fix | Delete

[474] Fix | Delete

/**

[475] Fix | Delete

* To fix the Cloud callback cached as its frontend call but the hash is generated in backend

[476] Fix | Delete

* Bug found by Stan at Jan/10/2020

[477] Fix | Delete

*/

[478] Fix | Delete

// if ( ! $this->_can_cache() ) {

[479] Fix | Delete

// return null;

[480] Fix | Delete

// }

[481] Fix | Delete

[482] Fix | Delete

if (!$this->_connect()) {

[483] Fix | Delete

return null;

[484] Fix | Delete

}

[485] Fix | Delete

$ttl = $expire ?: $this->_cfg_life;

[486] Fix | Delete

[487] Fix | Delete

if ($this->_oc_driver == 'Redis') {

[488] Fix | Delete

try {

[489] Fix | Delete

$res = $this->_conn->setEx($key, $ttl, $data);

[490] Fix | Delete

} catch (\RedisException $ex) {

[491] Fix | Delete

$res = false;

[492] Fix | Delete

$msg = sprintf(__('Redis encountered a fatal error: %s (code: %d)', 'litespeed-cache'), $ex->getMessage(), $ex->getCode());

[493] Fix | Delete

$this->debug_oc($msg);

[494] Fix | Delete

Admin_Display::error($msg);

[495] Fix | Delete

}

[496] Fix | Delete

} else {

[497] Fix | Delete

$res = $this->_conn->set($key, $data, $ttl);

[498] Fix | Delete

}

[499] Fix | Delete