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Edit File : crawler.cls.php \| Size : 40.64 KB
<?php /** * The crawler class * * @since 1.1.0 / namespace LiteSpeed; defined('WPINC') \|\| exit(); class Crawler extends Root { const LOG_TAG = '🕸️'; const TYPE_REFRESH_MAP = 'refresh_map'; const TYPE_EMPTY = 'empty'; const TYPE_BLACKLIST_EMPTY = 'blacklist_empty'; const TYPE_BLACKLIST_DEL = 'blacklist_del'; const TYPE_BLACKLIST_ADD = 'blacklist_add'; const TYPE_START = 'start'; const TYPE_RESET = 'reset'; const USER_AGENT = 'lscache_walker'; const FAST_USER_AGENT = 'lscache_runner'; const CHUNKS = 10000; const STATUS_WAIT = 'W'; const STATUS_HIT = 'H'; const STATUS_MISS = 'M'; const STATUS_BLACKLIST = 'B'; const STATUS_NOCACHE = 'N'; private $_sitemeta = 'meta.data'; private $_resetfile; private $_end_reason; private $_ncpu = 1; private $_server_ip; private $_crawler_conf = array( 'cookies' => array(), 'headers' => array(), 'ua' => '', ); private $_crawlers = array(); private $_cur_threads = -1; private $_max_run_time; private $_cur_thread_time; private $_map_status_list = array( 'H' => array(), 'M' => array(), 'B' => array(), 'N' => array(), ); protected $_summary; /* * Initialize crawler, assign sitemap path * * @since 1.1.0 / public function __construct() { if (is_multisite()) { $this->_sitemeta = 'meta' . get_current_blog_id() . '.data'; } $this->_resetfile = LITESPEED_STATIC_DIR . '/crawler/' . $this->_sitemeta . '.reset'; $this->_summary = self::get_summary(); $this->_ncpu = $this->_get_server_cpu(); $this->_server_ip = $this->conf(Base::O_SERVER_IP); self::debug('Init w/ CPU cores=' . $this->_ncpu); } /* * Try get server CPUs * @since 5.2 / private function _get_server_cpu() { $cpuinfo_file = '/proc/cpuinfo'; $setting_open_dir = ini_get('open_basedir'); if ($setting_open_dir) { return 1; } // Server has limit try { if (!@is_file($cpuinfo_file)) { return 1; } } catch (\Exception $e) { return 1; } $cpuinfo = file_get_contents($cpuinfo_file); preg_match_all('/^processor/m', $cpuinfo, $matches); return count($matches[0]) ?: 1; } /* * Check whether the current crawler is active/runable/useable/enabled/want it to work or not * * @since 4.3 / public function is_active($curr) { $bypass_list = self::get_option('bypass_list', array()); return !in_array($curr, $bypass_list); } /* * Toggle the current crawler's activeness state, i.e., runable/useable/enabled/want it to work or not, and return the updated state * * @since 4.3 / public function toggle_activeness($curr) { // param type: int $bypass_list = self::get_option('bypass_list', array()); if (in_array($curr, $bypass_list)) { // when the ith opt was off / in the bypassed list, turn it on / remove it from the list unset($bypass_list[array_search($curr, $bypass_list)]); $bypass_list = array_values($bypass_list); self::update_option('bypass_list', $bypass_list); return true; } else { // when the ith opt was on / not in the bypassed list, turn it off / add it to the list $bypass_list[] = (int) $curr; self::update_option('bypass_list', $bypass_list); return false; } } /* * Clear bypassed list * * @since 4.3 * @access public / public function clear_disabled_list() { self::update_option('bypass_list', array()); $msg = __('Crawler disabled list is cleared! All crawlers are set to active! ', 'litespeed-cache'); Admin_Display::note($msg); self::debug('All crawlers are set to active...... '); } /* * Overwrite get_summary to init elements * * @since 3.0 * @access public / public static function get_summary($field = false) { $_default = array( 'list_size' => 0, 'last_update_time' => 0, 'curr_crawler' => 0, 'curr_crawler_beginning_time' => 0, 'last_pos' => 0, 'last_count' => 0, 'last_crawled' => 0, 'last_start_time' => 0, 'last_status' => '', 'is_running' => 0, 'end_reason' => '', 'meta_save_time' => 0, 'pos_reset_check' => 0, 'done' => 0, 'this_full_beginning_time' => 0, 'last_full_time_cost' => 0, 'last_crawler_total_cost' => 0, 'crawler_stats' => array(), // this will store all crawlers hit/miss crawl status ); wp_cache_delete('alloptions', 'options'); // ensure the summary is current $summary = parent::get_summary(); $summary = array_merge($_default, $summary); if (!$field) { return $summary; } if (array_key_exists($field, $summary)) { return $summary[$field]; } return null; } /* * Overwrite save_summary * * @since 3.0 * @access public / public static function save_summary($data = false, $reload = false, $overwrite = false) { $instance = self::cls(); $instance->_summary['meta_save_time'] = time(); if (!$data) { $data = $instance->_summary; } parent::save_summary($data, $reload, $overwrite); File::save(LITESPEED_STATIC_DIR . '/crawler/' . $instance->_sitemeta, \json_encode($data), true); } /* * Cron start async crawling * * @since 5.5 / public static function start_async_cron() { Task::async_call('crawler'); } /* * Manually start async crawling * * @since 5.5 / public static function start_async() { Task::async_call('crawler_force'); $msg = __('Started async crawling', 'litespeed-cache'); Admin_Display::success($msg); } /* * Ajax crawl handler * * @since 5.5 / public static function async_handler($manually_run = false) { self::debug('------------async-------------start_async_handler'); // check_ajax_referer('async_crawler', 'nonce'); self::start($manually_run); } /* * Proceed crawling * * @since 1.1.0 * @access public / public static function start($manually_run = false) { if (!Router::can_crawl()) { self::debug('......crawler is NOT allowed by the server admin......'); return false; } if ($manually_run) { self::debug('......crawler manually ran......'); } self::cls()->_crawl_data($manually_run); } /* * Crawling start * * @since 1.1.0 * @access private / private function _crawl_data($manually_run) { if (!defined('LITESPEED_LANE_HASH')) { define('LITESPEED_LANE_HASH', Str::rrand(8)); } if ($this->_check_valid_lane()) { $this->_take_over_lane(); } else { self::debug('⚠️ lane in use'); return; // if ($manually_run) { // self::debug('......crawler started (manually_rund)......'); // // Log pid to prevent from multi running // if (defined('LITESPEED_CLI')) { // // Take over lane // self::debug('⚠️⚠️⚠️ Forced take over lane (CLI)'); // $this->_take_over_lane(); // } // } } self::debug('......crawler started......'); // for the first time running if (!$this->_summary \|\| !Data::cls()->tb_exist('crawler') \|\| !Data::cls()->tb_exist('crawler_blacklist')) { $this->cls('Crawler_Map')->gen(); } // if finished last time, regenerate sitemap if ($this->_summary['done'] === 'touchedEnd') { // check whole crawling interval $last_finished_at = $this->_summary['last_full_time_cost'] + $this->_summary['this_full_beginning_time']; if (!$manually_run && time() - $last_finished_at < $this->conf(Base::O_CRAWLER_CRAWL_INTERVAL)) { self::debug('Cron abort: cache warmed already.'); // if not reach whole crawling interval, exit $this->Release_lane(); return; } self::debug('TouchedEnd. regenerate sitemap....'); $this->cls('Crawler_Map')->gen(); } $this->list_crawlers(); // Skip the crawlers that in bypassed list while (!$this->is_active($this->_summary['curr_crawler']) && $this->_summary['curr_crawler'] < count($this->_crawlers)) { self::debug('Skipped the Crawler #' . $this->_summary['curr_crawler'] . ' ......'); $this->_summary['curr_crawler']++; } if ($this->_summary['curr_crawler'] >= count($this->_crawlers)) { $this->_end_reason = 'end'; $this->_terminate_running(); $this->Release_lane(); return; } // In case crawlers are all done but not reload, reload it if (empty($this->_summary['curr_crawler']) \|\| empty($this->_crawlers[$this->_summary['curr_crawler']])) { $this->_summary['curr_crawler'] = 0; $this->_summary['crawler_stats'][$this->_summary['curr_crawler']] = array(); } $res = $this->load_conf(); if (!$res) { self::debug('Load conf failed'); $this->_terminate_running(); $this->Release_lane(); return; } try { $this->_engine_start(); $this->Release_lane(); } catch (\Exception $e) { self::debug('🛑 ' . $e->getMessage()); } } /* * Load conf before running crawler * * @since 3.0 * @access private / private function load_conf() { $this->_crawler_conf['base'] = home_url(); $current_crawler = $this->_crawlers[$this->_summary['curr_crawler']]; /* * Check cookie crawler * @since 2.8 / foreach ($current_crawler as $k => $v) { if (strpos($k, 'cookie:') !== 0) { continue; } if ($v == '_null') { continue; } $this->_crawler_conf['cookies'][substr($k, 7)] = $v; } /* * Set WebP simulation * @since 1.9.1 / if (!empty($current_crawler['webp'])) { $this->_crawler_conf['headers'][] = 'Accept: image/' . ($this->conf(Base::O_IMG_OPTM_WEBP) == 2 ? 'avif' : 'webp') . ',/'; } /* * Set mobile crawler * @since 2.8 / if (!empty($current_crawler['mobile'])) { $this->_crawler_conf['ua'] = 'Mobile iPhone'; } /* * Limit delay to use server setting * @since 1.8.3 / $this->_crawler_conf['run_delay'] = 500; // microseconds if (defined('LITESPEED_CRAWLER_USLEEP') && LITESPEED_CRAWLER_USLEEP > $this->_crawler_conf['run_delay']) { $this->_crawler_conf['run_delay'] = LITESPEED_CRAWLER_USLEEP; } if (!empty($_SERVER[Base::ENV_CRAWLER_USLEEP]) && $_SERVER[Base::ENV_CRAWLER_USLEEP] > $this->_crawler_conf['run_delay']) { $this->_crawler_conf['run_delay'] = $_SERVER[Base::ENV_CRAWLER_USLEEP]; } $this->_crawler_conf['run_duration'] = $this->get_crawler_duration(); $this->_crawler_conf['load_limit'] = $this->conf(Base::O_CRAWLER_LOAD_LIMIT); if (!empty($_SERVER[Base::ENV_CRAWLER_LOAD_LIMIT_ENFORCE])) { $this->_crawler_conf['load_limit'] = $_SERVER[Base::ENV_CRAWLER_LOAD_LIMIT_ENFORCE]; } elseif (!empty($_SERVER[Base::ENV_CRAWLER_LOAD_LIMIT]) && $_SERVER[Base::ENV_CRAWLER_LOAD_LIMIT] < $this->_crawler_conf['load_limit']) { $this->_crawler_conf['load_limit'] = $_SERVER[Base::ENV_CRAWLER_LOAD_LIMIT]; } if ($this->_crawler_conf['load_limit'] == 0) { self::debug('🛑 Terminated crawler due to load limit set to 0'); return false; } /* * Set role simulation * @since 1.9.1 / if (!empty($current_crawler['uid'])) { if (!$this->_server_ip) { self::debug('🛑 Terminated crawler due to Server IP not set'); return false; } // Get role simulation vary name $vary_name = $this->cls('Vary')->get_vary_name(); $vary_val = $this->cls('Vary')->finalize_default_vary($current_crawler['uid']); $this->_crawler_conf['cookies'][$vary_name] = $vary_val; $this->_crawler_conf['cookies']['litespeed_hash'] = Router::cls()->get_hash($current_crawler['uid']); } return true; } /* * Get crawler duration allowance * * @since 7.0 / public function get_crawler_duration() { $RUN_DURATION = defined('LITESPEED_CRAWLER_DURATION') ? LITESPEED_CRAWLER_DURATION : 900; if ($RUN_DURATION > 900) { $RUN_DURATION = 900; // reset to default value if defined in conf file is higher than 900 seconds for security enhancement } return $RUN_DURATION; } /* * Start crawler * * @since 1.1.0 * @access private / private function _engine_start() { // check if is running // if ($this->_summary['is_running'] && time() - $this->_summary['is_running'] < $this->_crawler_conf['run_duration']) { // $this->_end_reason = 'stopped'; // self::debug('The crawler is running.'); // return; // } // check current load $this->_adjust_current_threads(); if ($this->_cur_threads == 0) { $this->_end_reason = 'stopped_highload'; self::debug('Stopped due to heavy load.'); return; } // log started time self::save_summary(array('last_start_time' => time())); // set time limit $maxTime = (int) ini_get('max_execution_time'); self::debug('ini_get max_execution_time=' . $maxTime); if ($maxTime == 0) { $maxTime = 300; // hardlimit } else { $maxTime -= 5; } if ($maxTime >= $this->_crawler_conf['run_duration']) { $maxTime = $this->_crawler_conf['run_duration']; self::debug('Use run_duration setting as max_execution_time=' . $maxTime); } elseif (ini_set('max_execution_time', $this->_crawler_conf['run_duration'] + 15) !== false) { $maxTime = $this->_crawler_conf['run_duration']; self::debug('ini_set max_execution_time=' . $maxTime); } self::debug('final max_execution_time=' . $maxTime); $this->_max_run_time = $maxTime + time(); // mark running $this->_prepare_running(); // run crawler $this->_do_running(); $this->_terminate_running(); } /* * Get server load * * @since 5.5 / public function get_server_load() { /* * If server is windows, exit * @see https://wordpress.org/support/topic/crawler-keeps-causing-crashes/ / if (!function_exists('sys_getloadavg')) { return -1; } $curload = sys_getloadavg(); $curload = $curload[0]; self::debug('Server load: ' . $curload); return $curload; } /* * Adjust threads dynamically * * @since 1.1.0 * @access private / private function _adjust_current_threads() { $curload = $this->get_server_load(); if ($curload == -1) { self::debug('set threads=0 due to func sys_getloadavg not exist!'); $this->_cur_threads = 0; return; } $curload /= $this->_ncpu; // $curload = 1; $CRAWLER_THREADS = defined('LITESPEED_CRAWLER_THREADS') ? LITESPEED_CRAWLER_THREADS : 3; if ($this->_cur_threads == -1) { // init if ($curload > $this->_crawler_conf['load_limit']) { $curthreads = 0; } elseif ($curload >= $this->_crawler_conf['load_limit'] - 1) { $curthreads = 1; } else { $curthreads = intval($this->_crawler_conf['load_limit'] - $curload); if ($curthreads > $CRAWLER_THREADS) { $curthreads = $CRAWLER_THREADS; } } } else { // adjust $curthreads = $this->_cur_threads; if ($curload >= $this->_crawler_conf['load_limit'] + 1) { sleep(5); // sleep 5 secs if ($curthreads >= 1) { $curthreads--; } } elseif ($curload >= $this->_crawler_conf['load_limit']) { // if ( $curthreads > 1 ) {// if already 1, keep $curthreads--; // } } elseif ($curload + 1 < $this->_crawler_conf['load_limit']) { if ($curthreads < $CRAWLER_THREADS) { $curthreads++; } } } // $log = 'set current threads = ' . $curthreads . ' previous=' . $this->_cur_threads // . ' max_allowed=' . $CRAWLER_THREADS . ' load_limit=' . $this->_crawler_conf[ 'load_limit' ] . ' current_load=' . $curload; $this->_cur_threads = $curthreads; $this->_cur_thread_time = time(); } /* * Mark running status * * @since 1.1.0 * @access private / private function _prepare_running() { $this->_summary['is_running'] = time(); $this->_summary['done'] = 0; // reset done status $this->_summary['last_status'] = 'prepare running'; $this->_summary['last_crawled'] = 0; // Current crawler starttime mark if ($this->_summary['last_pos'] == 0) { $this->_summary['curr_crawler_beginning_time'] = time(); } if ($this->_summary['curr_crawler'] == 0 && $this->_summary['last_pos'] == 0) { $this->_summary['this_full_beginning_time'] = time(); $this->_summary['list_size'] = $this->cls('Crawler_Map')->count_map(); } if ($this->_summary['end_reason'] == 'end' && $this->_summary['last_pos'] == 0) { $this->_summary['crawler_stats'][$this->_summary['curr_crawler']] = array(); } self::save_summary(); } /* * Take over lane * @since 6.1 / private function _take_over_lane() { self::debug('Take over lane as lane is free: ' . $this->json_local_path() . '.pid'); file::save($this->json_local_path() . '.pid', LITESPEED_LANE_HASH); } /* * Update lane file * @since 6.1 / private function _touch_lane() { touch($this->json_local_path() . '.pid'); } /* * Release lane file * @since 6.1 / public function Release_lane() { $lane_file = $this->json_local_path() . '.pid'; if (!file_exists($lane_file)) { return; } self::debug('Release lane'); unlink($lane_file); } /* * Check if lane is used by other crawlers * @since 6.1 / private function _check_valid_lane($strict_mode = false) { // Check lane hash $lane_file = $this->json_local_path() . '.pid'; if ($strict_mode) { if (!file_exists($lane_file)) { self::debug("lane file not existed, strict mode is false [file] $lane_file"); return false; } } $pid = file::read($lane_file); if ($pid && LITESPEED_LANE_HASH != $pid) { // If lane file is older than 1h, ignore if (time() - filemtime($lane_file) > 3600) { self::debug('Lane file is older than 1h, releasing lane'); $this->Release_lane(); return true; } return false; } return true; } /* * Test port for simulator * * @since 7.0 * @access private * @return bool true if success and can continue crawling, false if failed and need to stop / private function _test_port() { if (empty($this->_crawler_conf['cookies']) \|\| empty($this->_crawler_conf['cookies']['litespeed_hash'])) { return true; } if (!$this->_server_ip) { self::debug('❌ Server IP not set'); return false; } if (defined('LITESPEED_CRAWLER_LOCAL_PORT')) { self::debug('✅ LITESPEED_CRAWLER_LOCAL_PORT already defined'); return true; } // Don't repeat testing in 120s if (!empty($this->_summary['test_port_tts']) && time() - $this->_summary['test_port_tts'] < 120) { if (!empty($this->_summary['test_port'])) { self::debug('✅ Use tested local port: ' . $this->_summary['test_port']); define('LITESPEED_CRAWLER_LOCAL_PORT', $this->_summary['test_port']); return true; } return false; } $this->_summary['test_port_tts'] = time(); self::save_summary(); $options = $this->_get_curl_options(); $home = home_url(); File::save(LITESPEED_STATIC_DIR . '/crawler/test_port.txt', $home, true); $url = LITESPEED_STATIC_URL . '/crawler/test_port.txt'; $parsed_url = parse_url($url); if (empty($parsed_url['host'])) { self::debug('❌ Test port failed, invalid URL: ' . $url); return false; } $resolved = $parsed_url['host'] . ':443:' . $this->_server_ip; $options[CURLOPT_RESOLVE] = array($resolved); $options[CURLOPT_DNS_USE_GLOBAL_CACHE] = false; $options[CURLOPT_HEADER] = false; self::debug('Test local 443 port for ' . $resolved); $ch = curl_init(); curl_setopt_array($ch, $options); curl_setopt($ch, CURLOPT_URL, $url); $result = curl_exec($ch); $test_result = false; if (curl_errno($ch) \|\| $result !== $home) { if (curl_errno($ch)) { self::debug('❌ Test port curl error: [errNo] ' . curl_errno($ch) . ' [err] ' . curl_error($ch)); } elseif ($result !== $home) { self::debug('❌ Test port response is wrong: ' . $result); } self::debug('❌ Test local 443 port failed, try port 80'); // Try port 80 $resolved = $parsed_url['host'] . ':80:' . $this->_server_ip; $options[CURLOPT_RESOLVE] = array($resolved); $url = str_replace('https://', 'http://', $url); if (!in_array('X-Forwarded-Proto: https', $options[CURLOPT_HTTPHEADER])) { $options[CURLOPT_HTTPHEADER][] = 'X-Forwarded-Proto: https'; } // $options[CURLOPT_HTTPHEADER][] = 'X-Forwarded-SSL: on'; $ch = curl_init(); curl_setopt_array($ch, $options); curl_setopt($ch, CURLOPT_URL, $url); $result = curl_exec($ch); if (curl_errno($ch)) { self::debug('❌ Test port curl error: [errNo] ' . curl_errno($ch) . ' [err] ' . curl_error($ch)); } elseif ($result !== $home) { self::debug('❌ Test port response is wrong: ' . $result); } else { self::debug('✅ Test local 80 port successfully'); define('LITESPEED_CRAWLER_LOCAL_PORT', 80); $this->_summary['test_port'] = 80; $test_result = true; } // self::debug('Response data: ' . $result); // $this->Release_lane(); // exit($result); } else { self::debug('✅ Tested local 443 port successfully'); define('LITESPEED_CRAWLER_LOCAL_PORT', 443); $this->_summary['test_port'] = 443; $test_result = true; } self::save_summary(); curl_close($ch); return $test_result; } /* * Run crawler * * @since 1.1.0 * @access private / private function _do_running() { $options = $this->_get_curl_options(true); // If is role simulator and not defined local port, check port once $test_result = $this->_test_port(); if (!$test_result) { $this->_end_reason = 'port_test_failed'; self::debug('❌ Test port failed, crawler stopped.'); return; } while ($urlChunks = $this->cls('Crawler_Map')->list_map(self::CHUNKS, $this->_summary['last_pos'])) { // self::debug('$urlChunks=' . count($urlChunks) . ' $this->_cur_threads=' . $this->_cur_threads); // start crawling $urlChunks = array_chunk($urlChunks, $this->_cur_threads); // self::debug('$urlChunks after array_chunk: ' . count($urlChunks)); foreach ($urlChunks as $rows) { if (!$this->_check_valid_lane(true)) { $this->_end_reason = 'lane_invalid'; self::debug('🛑 The crawler lane is used by newer crawler.'); throw new \Exception('invalid crawler lane'); } // Update time $this->_touch_lane(); // self::debug('chunk fetching count($rows)= ' . count($rows)); // multi curl $rets = $this->_multi_request($rows, $options); // check result headers foreach ($rows as $row) { // self::debug('chunk fetching 553'); if (empty($rets[$row['id']])) { // If already in blacklist, no curl happened, no corresponding record continue; } // self::debug('chunk fetching 557'); // check response if ($rets[$row['id']]['code'] == 428) { // HTTP/1.1 428 Precondition Required (need to test) $this->_end_reason = 'crawler_disabled'; self::debug('crawler_disabled'); return; } $status = $this->_status_parse($rets[$row['id']]['header'], $rets[$row['id']]['code'], $row['url']); // B or H or M or N(nocache) self::debug('[status] ' . $this->_status2title($status) . "\t\t [url] " . $row['url']); $this->_map_status_list[$status][$row['id']] = array( 'url' => $row['url'], 'code' => $rets[$row['id']]['code'], // 201 or 200 or 404 ); if (empty($this->_summary['crawler_stats'][$this->_summary['curr_crawler']][$status])) { $this->_summary['crawler_stats'][$this->_summary['curr_crawler']][$status] = 0; } $this->_summary['crawler_stats'][$this->_summary['curr_crawler']][$status]++; } // update offset position $_time = time(); $this->_summary['last_count'] = count($rows); $this->_summary['last_pos'] += $this->_summary['last_count']; $this->_summary['last_crawled'] += $this->_summary['last_count']; $this->_summary['last_update_time'] = $_time; $this->_summary['last_status'] = 'updated position'; // self::debug("chunk fetching 604 last_pos:{$this->_summary['last_pos']} last_count:{$this->_summary['last_count']} last_crawled:{$this->_summary['last_crawled']}"); // check duration if ($this->_summary['last_update_time'] > $this->_max_run_time) { $this->_end_reason = 'stopped_maxtime'; self::debug('Terminated due to maxtime'); return; // return __('Stopped due to exceeding defined Maximum Run Time', 'litespeed-cache'); } // make sure at least each 10s save meta & map status once if ($_time - $this->_summary['meta_save_time'] > 10) { $this->_map_status_list = $this->cls('Crawler_Map')->save_map_status($this->_map_status_list, $this->_summary['curr_crawler']); self::save_summary(); } // self::debug('chunk fetching 597'); // check if need to reset pos each 5s if ($_time > $this->_summary['pos_reset_check']) { $this->_summary['pos_reset_check'] = $_time + 5; if (file_exists($this->_resetfile) && unlink($this->_resetfile)) { self::debug('Terminated due to reset file'); $this->_summary['last_pos'] = 0; $this->_summary['curr_crawler'] = 0; $this->_summary['crawler_stats'][$this->_summary['curr_crawler']] = array(); // reset done status $this->_summary['done'] = 0; $this->_summary['this_full_beginning_time'] = 0; $this->_end_reason = 'stopped_reset'; return; // return __('Stopped due to reset meta position', 'litespeed-cache'); } } // self::debug('chunk fetching 615'); // check loads if ($this->_summary['last_update_time'] - $this->_cur_thread_time > 60) { $this->_adjust_current_threads(); if ($this->_cur_threads == 0) { $this->_end_reason = 'stopped_highload'; self::debug('🛑 Terminated due to highload'); return; // return __('Stopped due to load over limit', 'litespeed-cache'); } } $this->_summary['last_status'] = 'sleeping ' . $this->_crawler_conf['run_delay'] . 'ms'; usleep($this->_crawler_conf['run_delay']); } // self::debug('chunk fetching done'); } // All URLs are done for current crawler $this->_end_reason = 'end'; $this->_summary['crawler_stats'][$this->_summary['curr_crawler']]['W'] = 0; self::debug('Crawler #' . $this->_summary['curr_crawler'] . ' touched end'); } /* * Send multi curl requests * If res=B, bypass request and won't return * * @since 1.1.0 * @access private / private function _multi_request($rows, $options) { if (!function_exists('curl_multi_init')) { exit('curl_multi_init disabled'); } $mh = curl_multi_init(); $CRAWLER_DROP_DOMAIN = defined('LITESPEED_CRAWLER_DROP_DOMAIN') ? LITESPEED_CRAWLER_DROP_DOMAIN : false; $curls = array(); foreach ($rows as $row) { if (substr($row['res'], $this->_summary['curr_crawler'], 1) == self::STATUS_BLACKLIST) { continue; } if (substr($row['res'], $this->_summary['curr_crawler'], 1) == self::STATUS_NOCACHE) { continue; } if (!function_exists('curl_init')) { exit('curl_init disabled'); } $curls[$row['id']] = curl_init(); // Append URL $url = $row['url']; if ($CRAWLER_DROP_DOMAIN) { $url = $this->_crawler_conf['base'] . $row['url']; } // IP resolve if (!empty($this->_crawler_conf['cookies']) && !empty($this->_crawler_conf['cookies']['litespeed_hash'])) { $parsed_url = parse_url($url); // self::debug('Crawl role simulator, required to use localhost for resolve'); if (!empty($parsed_url['host'])) { $dom = $parsed_url['host']; $port = defined('LITESPEED_CRAWLER_LOCAL_PORT') ? LITESPEED_CRAWLER_LOCAL_PORT : '443'; $resolved = $dom . ':' . $port . ':' . $this->_server_ip; $options[CURLOPT_RESOLVE] = array($resolved); $options[CURLOPT_DNS_USE_GLOBAL_CACHE] = false; // $options[CURLOPT_PORT] = $port; if ($port == 80) { $url = str_replace('https://', 'http://', $url); if (!in_array('X-Forwarded-Proto: https', $options[CURLOPT_HTTPHEADER])) { $options[CURLOPT_HTTPHEADER][] = 'X-Forwarded-Proto: https'; } } self::debug('Resolved DNS for ' . $resolved); } } curl_setopt($curls[$row['id']], CURLOPT_URL, $url); self::debug('Crawling [url] ' . $url . ($url == $row['url'] ? '' : ' [ori] ' . $row['url'])); curl_setopt_array($curls[$row['id']], $options); curl_multi_add_handle($mh, $curls[$row['id']]); } // execute curl if ($curls) { do { $status = curl_multi_exec($mh, $active); if ($active) { curl_multi_select($mh); } } while ($active && $status == CURLM_OK); } // curl done $ret = array(); foreach ($rows as $row) { if (substr($row['res'], $this->_summary['curr_crawler'], 1) == self::STATUS_BLACKLIST) { continue; } if (substr($row['res'], $this->_summary['curr_crawler'], 1) == self::STATUS_NOCACHE) { continue; } // self::debug('-----debug3'); $ch = $curls[$row['id']]; // Parse header $header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE); $content = curl_multi_getcontent($ch); $header = substr($content, 0, $header_size); $ret[$row['id']] = array( 'header' => $header, 'code' => curl_getinfo($ch, CURLINFO_HTTP_CODE), ); // self::debug('-----debug4'); curl_multi_remove_handle($mh, $ch); curl_close($ch); } // self::debug('-----debug5'); curl_multi_close($mh); // self::debug('-----debug6'); return $ret; } /* * Translate the status to title * @since 6.0 / private function _status2title($status) { if ($status == self::STATUS_HIT) { return '✅ Hit'; } if ($status == self::STATUS_MISS) { return '😊 Miss'; } if ($status == self::STATUS_BLACKLIST) { return '😅 Blacklisted'; } if ($status == self::STATUS_NOCACHE) { return '😅 Blacklisted'; } return '🛸 Unknown'; } /* * Check returned curl header to find if cached or not * * @since 2.0 * @access private / private function _status_parse($header, $code, $url) { // self::debug('http status code: ' . $code . ' [headers]', $header); if ($code == 201) { return self::STATUS_HIT; } if (stripos($header, 'X-Litespeed-Cache-Control: no-cache') !== false) { // If is from DIVI, taken as miss if (defined('LITESPEED_CRAWLER_IGNORE_NONCACHEABLE') && LITESPEED_CRAWLER_IGNORE_NONCACHEABLE) { return self::STATUS_MISS; } // If blacklist is disabled if ((defined('LITESPEED_CRAWLER_DISABLE_BLOCKLIST') && LITESPEED_CRAWLER_DISABLE_BLOCKLIST) \|\| apply_filters('litespeed_crawler_disable_blocklist', false, $url)) { return self::STATUS_MISS; } return self::STATUS_NOCACHE; // Blacklist } $_cache_headers = array('x-qc-cache', 'x-lsadc-cache', 'x-litespeed-cache'); foreach ($_cache_headers as $_header) { if (stripos($header, $_header) !== false) { if (stripos($header, $_header . ': miss') !== false) { return self::STATUS_MISS; // Miss } return self::STATUS_HIT; // Hit } } // If blacklist is disabled if ((defined('LITESPEED_CRAWLER_DISABLE_BLOCKLIST') && LITESPEED_CRAWLER_DISABLE_BLOCKLIST) \|\| apply_filters('litespeed_crawler_disable_blocklist', false, $url)) { return self::STATUS_MISS; } return self::STATUS_BLACKLIST; // Blacklist } /* * Get curl_options * * @since 1.1.0 * @access private / private function _get_curl_options($crawler_only = false) { $CRAWLER_TIMEOUT = defined('LITESPEED_CRAWLER_TIMEOUT') ? LITESPEED_CRAWLER_TIMEOUT : 30; $options = array( CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => true, CURLOPT_CUSTOMREQUEST => 'GET', CURLOPT_FOLLOWLOCATION => false, CURLOPT_ENCODING => 'gzip', CURLOPT_CONNECTTIMEOUT => 10, CURLOPT_TIMEOUT => $CRAWLER_TIMEOUT, // Larger timeout to avoid incorrect blacklist addition #900171 CURLOPT_SSL_VERIFYHOST => 0, CURLOPT_SSL_VERIFYPEER => false, CURLOPT_NOBODY => false, CURLOPT_HTTPHEADER => $this->_crawler_conf['headers'], ); $options[CURLOPT_HTTPHEADER][] = 'Cache-Control: max-age=0'; /* * Try to enable http2 connection (only available since PHP7+) * @since 1.9.1 * @since 2.2.7 Commented due to cause no-cache issue * @since 2.9.1+ Fixed wrongly usage of CURL_HTTP_VERSION_1_1 const / $options[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_1; // $options[ CURL_HTTP_VERSION_2 ] = 1; // if is walker // $options[ CURLOPT_FRESH_CONNECT ] = true; // Referer if (isset($_SERVER['HTTP_HOST']) && isset($_SERVER['REQUEST_URI'])) { $options[CURLOPT_REFERER] = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; } // User Agent if ($crawler_only) { if (strpos($this->_crawler_conf['ua'], Crawler::FAST_USER_AGENT) !== 0) { $this->_crawler_conf['ua'] = Crawler::FAST_USER_AGENT . ' ' . $this->_crawler_conf['ua']; } } $options[CURLOPT_USERAGENT] = $this->_crawler_conf['ua']; // Cookies $cookies = array(); foreach ($this->_crawler_conf['cookies'] as $k => $v) { if (!$v) { continue; } $cookies[] = $k . '=' . urlencode($v); } if ($cookies) { $options[CURLOPT_COOKIE] = implode('; ', $cookies); } return $options; } /* * Self curl to get HTML content * * @since 3.3 / public function self_curl($url, $ua, $uid = false, $accept = false) { // $accept not in use yet $this->_crawler_conf['base'] = home_url(); $this->_crawler_conf['ua'] = $ua; if ($accept) { $this->_crawler_conf['headers'] = array('Accept: ' . $accept); } $options = $this->_get_curl_options(); if ($uid) { $this->_crawler_conf['cookies']['litespeed_flash_hash'] = Router::cls()->get_flash_hash($uid); $parsed_url = parse_url($url); if (!empty($parsed_url['host'])) { $dom = $parsed_url['host']; $port = defined('LITESPEED_CRAWLER_LOCAL_PORT') ? LITESPEED_CRAWLER_LOCAL_PORT : '443'; $resolved = $dom . ':' . $port . ':' . $this->_server_ip; $options[CURLOPT_RESOLVE] = array($resolved); $options[CURLOPT_DNS_USE_GLOBAL_CACHE] = false; $options[CURLOPT_PORT] = $port; self::debug('Resolved DNS for ' . $resolved); } } $options[CURLOPT_HEADER] = false; $options[CURLOPT_FOLLOWLOCATION] = true; $ch = curl_init(); curl_setopt_array($ch, $options); curl_setopt($ch, CURLOPT_URL, $url); $result = curl_exec($ch); $code = curl_getinfo($ch, CURLINFO_HTTP_CODE); curl_close($ch); if ($code != 200) { self::debug('❌ Response code is not 200 in self_curl() [code] ' . var_export($code, true)); return false; } return $result; } /* * Terminate crawling * * @since 1.1.0 * @access private / private function _terminate_running() { $this->_map_status_list = $this->cls('Crawler_Map')->save_map_status($this->_map_status_list, $this->_summary['curr_crawler']); if ($this->_end_reason == 'end') { // Current crawler is fully done // $end_reason = sprintf( __( 'Crawler %s reached end of sitemap file.', 'litespeed-cache' ), '#' . ( $this->_summary['curr_crawler'] + 1 ) ); $this->_summary['curr_crawler']++; // Jump to next crawler // $this->_summary[ 'crawler_stats' ][ $this->_summary[ 'curr_crawler' ] ] = array(); // reset this at next crawl time $this->_summary['last_pos'] = 0; // reset last position $this->_summary['last_crawler_total_cost'] = time() - $this->_summary['curr_crawler_beginning_time']; $count_crawlers = count($this->list_crawlers()); if ($this->_summary['curr_crawler'] >= $count_crawlers) { self::debug('_terminate_running Touched end, whole crawled. Reload crawler!'); $this->_summary['curr_crawler'] = 0; // $this->_summary[ 'crawler_stats' ][ $this->_summary[ 'curr_crawler' ] ] = array(); $this->_summary['done'] = 'touchedEnd'; // log done status $this->_summary['last_full_time_cost'] = time() - $this->_summary['this_full_beginning_time']; } } $this->_summary['last_status'] = 'stopped'; $this->_summary['is_running'] = 0; $this->_summary['end_reason'] = $this->_end_reason; self::save_summary(); } /* * List all crawlers ( tagA => [ valueA => titleA, ... ] ...) * * @since 1.9.1 * @access public / public function list_crawlers() { if ($this->_crawlers) { return $this->_crawlers; } $crawler_factors = array(); // Add default Guest crawler $crawler_factors['uid'] = array(0 => __('Guest', 'litespeed-cache')); // WebP on/off if ($this->conf(Base::O_IMG_OPTM_WEBP)) { $crawler_factors['webp'] = array(1 => $this->cls('Media')->next_gen_image_title()); if (apply_filters('litespeed_crawler_webp', false)) { $crawler_factors['webp'][0] = ''; } } // Guest Mode on/off if ($this->conf(Base::O_GUEST)) { $vary_name = $this->cls('Vary')->get_vary_name(); $vary_val = 'guest_mode:1'; if (!defined('LSCWP_LOG')) { $vary_val = md5($this->conf(Base::HASH) . $vary_val); } $crawler_factors['cookie:' . $vary_name] = array($vary_val => '', '_null' => '<font data-balloon-pos="up" aria-label="Guest Mode">👒</font>'); } // Mobile crawler if ($this->conf(Base::O_CACHE_MOBILE)) { $crawler_factors['mobile'] = array(1 => '<font data-balloon-pos="up" aria-label="Mobile">📱</font>', 0 => ''); } // Get roles set // List all roles foreach ($this->conf(Base::O_CRAWLER_ROLES) as $v) { $role_title = ''; $udata = get_userdata($v); if (isset($udata->roles) && is_array($udata->roles)) { $tmp = array_values($udata->roles); $role_title = array_shift($tmp); } if (!$role_title) { continue; } $crawler_factors['uid'][$v] = ucfirst($role_title); } // Cookie crawler foreach ($this->conf(Base::O_CRAWLER_COOKIES) as $v) { if (empty($v['name'])) { continue; } $this_cookie_key = 'cookie:' . $v['name']; $crawler_factors[$this_cookie_key] = array(); foreach ($v['vals'] as $v2) { $crawler_factors[$this_cookie_key][$v2] = $v2 == '_null' ? '' : '<font data-balloon-pos="up" aria-label="Cookie">🍪</font>' . esc_html($v['name']) . '=' . esc_html($v2); } } // Crossing generate the crawler list $this->_crawlers = $this->_recursive_build_crawler($crawler_factors); return $this->_crawlers; } /* * Build a crawler list recursively * * @since 2.8 * @access private / private function _recursive_build_crawler($crawler_factors, $group = array(), $i = 0) { $current_factor = array_keys($crawler_factors); $current_factor = $current_factor[$i]; $if_touch_end = $i + 1 >= count($crawler_factors); $final_list = array(); foreach ($crawler_factors[$current_factor] as $k => $v) { // Don't alter $group bcos of loop usage $item = $group; $item['title'] = !empty($group['title']) ? $group['title'] : ''; if ($v) { if ($item['title']) { $item['title'] .= ' - '; } $item['title'] .= $v; } $item[$current_factor] = $k; if ($if_touch_end) { $final_list[] = $item; } else { // Inception: next layer $final_list = array_merge($final_list, $this->_recursive_build_crawler($crawler_factors, $item, $i + 1)); } } return $final_list; } /* * Return crawler meta file local path * * @since 6.1 * @access public / public function json_local_path() { // if (!file_exists(LITESPEED_STATIC_DIR . '/crawler/' . $this->_sitemeta)) { // return false; // } return LITESPEED_STATIC_DIR . '/crawler/' . $this->_sitemeta; } /* * Return crawler meta file * * @since 1.1.0 * @access public / public function json_path() { if (!file_exists(LITESPEED_STATIC_DIR . '/crawler/' . $this->_sitemeta)) { return false; } return LITESPEED_STATIC_URL . '/crawler/' . $this->_sitemeta; } /* * Create reset pos file * * @since 1.1.0 * @access public / public function reset_pos() { File::save($this->_resetfile, time(), true); self::save_summary(array('is_running' => 0)); } /* * Display status based by matching crawlers order * * @since 3.0 * @access public / public function display_status($status_row, $reason_set) { if (!$status_row) { return ''; } $_status_list = array( '-' => 'default', self::STATUS_MISS => 'primary', self::STATUS_HIT => 'success', self::STATUS_BLACKLIST => 'danger', self::STATUS_NOCACHE => 'warning', ); $reason_set = explode(',', $reason_set); $status = ''; foreach (str_split($status_row) as $k => $v) { $reason = $reason_set[$k]; if ($reason == 'Man') { $reason = __('Manually added to blocklist', 'litespeed-cache'); } if ($reason == 'Existed') { $reason = __('Previously existed in blocklist', 'litespeed-cache'); } if ($reason) { $reason = 'data-balloon-pos="up" aria-label="' . $reason . '"'; } $status .= '<i class="litespeed-dot litespeed-bg-' . $_status_list[$v] . '" ' . $reason . '>' . ($k + 1) . '</i>'; } return $status; } /* * Output info and exit * * @since 1.1.0 * @access protected * @param string $error Error info / protected function output($msg) { if (defined('DOING_CRON')) { echo $msg; // exit(); } else { echo "<script>alert('" . htmlspecialchars($msg) . "');</script>"; // exit; } } /* * Handle all request actions from main cls * * @since 3.0 * @access public */ public function handler() { $type = Router::verify_type(); switch ($type) { case self::TYPE_REFRESH_MAP: $this->cls('Crawler_Map')->gen(true); break; case self::TYPE_EMPTY: $this->cls('Crawler_Map')->empty_map(); break; case self::TYPE_BLACKLIST_EMPTY: $this->cls('Crawler_Map')->blacklist_empty(); break; case self::TYPE_BLACKLIST_DEL: if (!empty($_GET['id'])) { $this->cls('Crawler_Map')->blacklist_del($_GET['id']); } break; case self::TYPE_BLACKLIST_ADD: if (!empty($_GET['id'])) { $this->cls('Crawler_Map')->blacklist_add($_GET['id']); } break; case self::TYPE_START: // Handle the ajax request to proceed crawler manually by admin self::start_async(); break; case self::TYPE_RESET: $this->reset_pos(); break; default: break; } Admin::redirect(); } } Back

Edit File : crawler.cls.php | Size : 40.64 KB

<?php

/**
 * The crawler class
 *
 * @since      	1.1.0
 */

namespace LiteSpeed;

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

class Crawler extends Root
{
	const LOG_TAG = '🕸️';

const TYPE_REFRESH_MAP = 'refresh_map';
	const TYPE_EMPTY = 'empty';
	const TYPE_BLACKLIST_EMPTY = 'blacklist_empty';
	const TYPE_BLACKLIST_DEL = 'blacklist_del';
	const TYPE_BLACKLIST_ADD = 'blacklist_add';
	const TYPE_START = 'start';
	const TYPE_RESET = 'reset';

const USER_AGENT = 'lscache_walker';
	const FAST_USER_AGENT = 'lscache_runner';
	const CHUNKS = 10000;

const STATUS_WAIT = 'W';
	const STATUS_HIT = 'H';
	const STATUS_MISS = 'M';
	const STATUS_BLACKLIST = 'B';
	const STATUS_NOCACHE = 'N';

private $_sitemeta = 'meta.data';
	private $_resetfile;
	private $_end_reason;
	private $_ncpu = 1;
	private $_server_ip;

private $_crawler_conf = array(
		'cookies' => array(),
		'headers' => array(),
		'ua' => '',
	);
	private $_crawlers = array();
	private $_cur_threads = -1;
	private $_max_run_time;
	private $_cur_thread_time;
	private $_map_status_list = array(
		'H' => array(),
		'M' => array(),
		'B' => array(),
		'N' => array(),
	);
	protected $_summary;

/**
	 * Initialize crawler, assign sitemap path
	 *
	 * @since    1.1.0
	 */
	public function __construct()
	{
		if (is_multisite()) {
			$this->_sitemeta = 'meta' . get_current_blog_id() . '.data';
		}

$this->_resetfile = LITESPEED_STATIC_DIR . '/crawler/' . $this->_sitemeta . '.reset';

$this->_summary = self::get_summary();

$this->_ncpu = $this->_get_server_cpu();
		$this->_server_ip = $this->conf(Base::O_SERVER_IP);

self::debug('Init w/ CPU cores=' . $this->_ncpu);
	}

/**
	 * Try get server CPUs
	 * @since 5.2
	 */
	private function _get_server_cpu()
	{
		$cpuinfo_file = '/proc/cpuinfo';
		$setting_open_dir = ini_get('open_basedir');
		if ($setting_open_dir) {
			return 1;
		} // Server has limit

try {
			if (!@is_file($cpuinfo_file)) {
				return 1;
			}
		} catch (\Exception $e) {
			return 1;
		}

$cpuinfo = file_get_contents($cpuinfo_file);
		preg_match_all('/^processor/m', $cpuinfo, $matches);
		return count($matches[0]) ?: 1;
	}

/**
	 * Check whether the current crawler is active/runable/useable/enabled/want it to work or not
	 *
	 * @since  4.3
	 */
	public function is_active($curr)
	{
		$bypass_list = self::get_option('bypass_list', array());
		return !in_array($curr, $bypass_list);
	}

/**
	 * Toggle the current crawler's activeness state, i.e., runable/useable/enabled/want it to work or not, and return the updated state
	 *
	 * @since  4.3
	 */
	public function toggle_activeness($curr)
	{
		// param type: int
		$bypass_list = self::get_option('bypass_list', array());
		if (in_array($curr, $bypass_list)) {
			// when the ith opt was off / in the bypassed list, turn it on / remove it from the list
			unset($bypass_list[array_search($curr, $bypass_list)]);
			$bypass_list = array_values($bypass_list);
			self::update_option('bypass_list', $bypass_list);
			return true;
		} else {
			// when the ith opt was on / not in the bypassed list, turn it off / add it to the list
			$bypass_list[] = (int) $curr;
			self::update_option('bypass_list', $bypass_list);
			return false;
		}
	}

/**
	 * Clear bypassed list
	 *
	 * @since  4.3
	 * @access public
	 */
	public function clear_disabled_list()
	{
		self::update_option('bypass_list', array());

$msg = __('Crawler disabled list is cleared! All crawlers are set to active! ', 'litespeed-cache');
		Admin_Display::note($msg);

self::debug('All crawlers are set to active...... ');
	}

/**
	 * Overwrite get_summary to init elements
	 *
	 * @since  3.0
	 * @access public
	 */
	public static function get_summary($field = false)
	{
		$_default = array(
			'list_size' => 0,
			'last_update_time' => 0,
			'curr_crawler' => 0,
			'curr_crawler_beginning_time' => 0,
			'last_pos' => 0,
			'last_count' => 0,
			'last_crawled' => 0,
			'last_start_time' => 0,
			'last_status' => '',
			'is_running' => 0,
			'end_reason' => '',
			'meta_save_time' => 0,
			'pos_reset_check' => 0,
			'done' => 0,
			'this_full_beginning_time' => 0,
			'last_full_time_cost' => 0,
			'last_crawler_total_cost' => 0,
			'crawler_stats' => array(), // this will store all crawlers hit/miss crawl status
		);

wp_cache_delete('alloptions', 'options'); // ensure the summary is current
		$summary = parent::get_summary();
		$summary = array_merge($_default, $summary);

if (!$field) {
			return $summary;
		}

if (array_key_exists($field, $summary)) {
			return $summary[$field];
		}

return null;
	}

/**
	 * Overwrite save_summary
	 *
	 * @since  3.0
	 * @access public
	 */
	public static function save_summary($data = false, $reload = false, $overwrite = false)
	{
		$instance = self::cls();
		$instance->_summary['meta_save_time'] = time();

if (!$data) {
			$data = $instance->_summary;
		}

parent::save_summary($data, $reload, $overwrite);

File::save(LITESPEED_STATIC_DIR . '/crawler/' . $instance->_sitemeta, \json_encode($data), true);
	}

/**
	 * Cron start async crawling
	 *
	 * @since 5.5
	 */
	public static function start_async_cron()
	{
		Task::async_call('crawler');
	}

/**
	 * Manually start async crawling
	 *
	 * @since 5.5
	 */
	public static function start_async()
	{
		Task::async_call('crawler_force');

$msg = __('Started async crawling', 'litespeed-cache');
		Admin_Display::success($msg);
	}

/**
	 * Ajax crawl handler
	 *
	 * @since 5.5
	 */
	public static function async_handler($manually_run = false)
	{
		self::debug('------------async-------------start_async_handler');
		// check_ajax_referer('async_crawler', 'nonce');
		self::start($manually_run);
	}

/**
	 * Proceed crawling
	 *
	 * @since    1.1.0
	 * @access public
	 */
	public static function start($manually_run = false)
	{
		if (!Router::can_crawl()) {
			self::debug('......crawler is NOT allowed by the server admin......');
			return false;
		}

if ($manually_run) {
			self::debug('......crawler manually ran......');
		}

self::cls()->_crawl_data($manually_run);
	}

/**
	 * Crawling start
	 *
	 * @since    1.1.0
	 * @access   private
	 */
	private function _crawl_data($manually_run)
	{
		if (!defined('LITESPEED_LANE_HASH')) {
			define('LITESPEED_LANE_HASH', Str::rrand(8));
		}
		if ($this->_check_valid_lane()) {
			$this->_take_over_lane();
		} else {
			self::debug('⚠️ lane in use');
			return;
			// if ($manually_run) {
			// 	self::debug('......crawler started (manually_rund)......');
			// 	// Log pid to prevent from multi running
			// 	if (defined('LITESPEED_CLI')) {
			// 		// Take over lane
			// 		self::debug('⚠️⚠️⚠️ Forced take over lane (CLI)');
			// 		$this->_take_over_lane();
			// 	}
			// }
		}
		self::debug('......crawler started......');

// for the first time running
		if (!$this->_summary || !Data::cls()->tb_exist('crawler') || !Data::cls()->tb_exist('crawler_blacklist')) {
			$this->cls('Crawler_Map')->gen();
		}

// if finished last time, regenerate sitemap
		if ($this->_summary['done'] === 'touchedEnd') {
			// check whole crawling interval
			$last_finished_at = $this->_summary['last_full_time_cost'] + $this->_summary['this_full_beginning_time'];
			if (!$manually_run && time() - $last_finished_at < $this->conf(Base::O_CRAWLER_CRAWL_INTERVAL)) {
				self::debug('Cron abort: cache warmed already.');
				// if not reach whole crawling interval, exit
				$this->Release_lane();
				return;
			}
			self::debug('TouchedEnd. regenerate sitemap....');
			$this->cls('Crawler_Map')->gen();
		}

$this->list_crawlers();

// Skip the crawlers that in bypassed list
		while (!$this->is_active($this->_summary['curr_crawler']) && $this->_summary['curr_crawler'] < count($this->_crawlers)) {
			self::debug('Skipped the Crawler #' . $this->_summary['curr_crawler'] . ' ......');
			$this->_summary['curr_crawler']++;
		}
		if ($this->_summary['curr_crawler'] >= count($this->_crawlers)) {
			$this->_end_reason = 'end';
			$this->_terminate_running();
			$this->Release_lane();
			return;
		}

// In case crawlers are all done but not reload, reload it
		if (empty($this->_summary['curr_crawler']) || empty($this->_crawlers[$this->_summary['curr_crawler']])) {
			$this->_summary['curr_crawler'] = 0;
			$this->_summary['crawler_stats'][$this->_summary['curr_crawler']] = array();
		}

$res = $this->load_conf();
		if (!$res) {
			self::debug('Load conf failed');
			$this->_terminate_running();
			$this->Release_lane();
			return;
		}

try {
			$this->_engine_start();
			$this->Release_lane();
		} catch (\Exception $e) {
			self::debug('🛑 ' . $e->getMessage());
		}
	}

/**
	 * Load conf before running crawler
	 *
	 * @since  3.0
	 * @access private
	 */
	private function load_conf()
	{
		$this->_crawler_conf['base'] = home_url();

$current_crawler = $this->_crawlers[$this->_summary['curr_crawler']];

/**
		 * Check cookie crawler
		 * @since  2.8
		 */
		foreach ($current_crawler as $k => $v) {
			if (strpos($k, 'cookie:') !== 0) {
				continue;
			}

if ($v == '_null') {
				continue;
			}

$this->_crawler_conf['cookies'][substr($k, 7)] = $v;
		}

/**
		 * Set WebP simulation
		 * @since  1.9.1
		 */
		if (!empty($current_crawler['webp'])) {
			$this->_crawler_conf['headers'][] = 'Accept: image/' . ($this->conf(Base::O_IMG_OPTM_WEBP) == 2 ? 'avif' : 'webp') . ',*/*';
		}

/**
		 * Set mobile crawler
		 * @since  2.8
		 */
		if (!empty($current_crawler['mobile'])) {
			$this->_crawler_conf['ua'] = 'Mobile iPhone';
		}

/**
		 * Limit delay to use server setting
		 * @since 1.8.3
		 */
		$this->_crawler_conf['run_delay'] = 500; // microseconds
		if (defined('LITESPEED_CRAWLER_USLEEP') && LITESPEED_CRAWLER_USLEEP > $this->_crawler_conf['run_delay']) {
			$this->_crawler_conf['run_delay'] = LITESPEED_CRAWLER_USLEEP;
		}
		if (!empty($_SERVER[Base::ENV_CRAWLER_USLEEP]) && $_SERVER[Base::ENV_CRAWLER_USLEEP] > $this->_crawler_conf['run_delay']) {
			$this->_crawler_conf['run_delay'] = $_SERVER[Base::ENV_CRAWLER_USLEEP];
		}

$this->_crawler_conf['run_duration'] = $this->get_crawler_duration();

$this->_crawler_conf['load_limit'] = $this->conf(Base::O_CRAWLER_LOAD_LIMIT);
		if (!empty($_SERVER[Base::ENV_CRAWLER_LOAD_LIMIT_ENFORCE])) {
			$this->_crawler_conf['load_limit'] = $_SERVER[Base::ENV_CRAWLER_LOAD_LIMIT_ENFORCE];
		} elseif (!empty($_SERVER[Base::ENV_CRAWLER_LOAD_LIMIT]) && $_SERVER[Base::ENV_CRAWLER_LOAD_LIMIT] < $this->_crawler_conf['load_limit']) {
			$this->_crawler_conf['load_limit'] = $_SERVER[Base::ENV_CRAWLER_LOAD_LIMIT];
		}
		if ($this->_crawler_conf['load_limit'] == 0) {
			self::debug('🛑 Terminated crawler due to load limit set to 0');
			return false;
		}

/**
		 * Set role simulation
		 * @since 1.9.1
		 */
		if (!empty($current_crawler['uid'])) {
			if (!$this->_server_ip) {
				self::debug('🛑 Terminated crawler due to Server IP not set');
				return false;
			}
			// Get role simulation vary name
			$vary_name = $this->cls('Vary')->get_vary_name();
			$vary_val = $this->cls('Vary')->finalize_default_vary($current_crawler['uid']);
			$this->_crawler_conf['cookies'][$vary_name] = $vary_val;
			$this->_crawler_conf['cookies']['litespeed_hash'] = Router::cls()->get_hash($current_crawler['uid']);
		}

return true;
	}

/**
	 * Get crawler duration allowance
	 *
	 * @since 7.0
	 */
	public function get_crawler_duration()
	{
		$RUN_DURATION = defined('LITESPEED_CRAWLER_DURATION') ? LITESPEED_CRAWLER_DURATION : 900;
		if ($RUN_DURATION > 900) {
			$RUN_DURATION = 900; // reset to default value if defined in conf file is higher than 900 seconds for security enhancement
		}
		return $RUN_DURATION;
	}

/**
	 * Start crawler
	 *
	 * @since  1.1.0
	 * @access private
	 */
	private function _engine_start()
	{
		// check if is running
		// if ($this->_summary['is_running'] && time() - $this->_summary['is_running'] < $this->_crawler_conf['run_duration']) {
		// 	$this->_end_reason = 'stopped';
		// 	self::debug('The crawler is running.');
		// 	return;
		// }

// check current load
		$this->_adjust_current_threads();
		if ($this->_cur_threads == 0) {
			$this->_end_reason = 'stopped_highload';
			self::debug('Stopped due to heavy load.');
			return;
		}

// log started time
		self::save_summary(array('last_start_time' => time()));

// set time limit
		$maxTime = (int) ini_get('max_execution_time');
		self::debug('ini_get max_execution_time=' . $maxTime);
		if ($maxTime == 0) {
			$maxTime = 300; // hardlimit
		} else {
			$maxTime -= 5;
		}
		if ($maxTime >= $this->_crawler_conf['run_duration']) {
			$maxTime = $this->_crawler_conf['run_duration'];
			self::debug('Use run_duration setting as max_execution_time=' . $maxTime);
		} elseif (ini_set('max_execution_time', $this->_crawler_conf['run_duration'] + 15) !== false) {
			$maxTime = $this->_crawler_conf['run_duration'];
			self::debug('ini_set max_execution_time=' . $maxTime);
		}
		self::debug('final max_execution_time=' . $maxTime);
		$this->_max_run_time = $maxTime + time();

// mark running
		$this->_prepare_running();
		// run crawler
		$this->_do_running();
		$this->_terminate_running();
	}

/**
	 * Get server load
	 *
	 * @since 5.5
	 */
	public function get_server_load()
	{
		/**
		 * If server is windows, exit
		 * @see  https://wordpress.org/support/topic/crawler-keeps-causing-crashes/
		 */
		if (!function_exists('sys_getloadavg')) {
			return -1;
		}

$curload = sys_getloadavg();
		$curload = $curload[0];
		self::debug('Server load: ' . $curload);
		return $curload;
	}

/**
	 * Adjust threads dynamically
	 *
	 * @since  1.1.0
	 * @access private
	 */
	private function _adjust_current_threads()
	{
		$curload = $this->get_server_load();
		if ($curload == -1) {
			self::debug('set threads=0 due to func sys_getloadavg not exist!');
			$this->_cur_threads = 0;
			return;
		}

$curload /= $this->_ncpu;
		// $curload = 1;
		$CRAWLER_THREADS = defined('LITESPEED_CRAWLER_THREADS') ? LITESPEED_CRAWLER_THREADS : 3;

if ($this->_cur_threads == -1) {
			// init
			if ($curload > $this->_crawler_conf['load_limit']) {
				$curthreads = 0;
			} elseif ($curload >= $this->_crawler_conf['load_limit'] - 1) {
				$curthreads = 1;
			} else {
				$curthreads = intval($this->_crawler_conf['load_limit'] - $curload);
				if ($curthreads > $CRAWLER_THREADS) {
					$curthreads = $CRAWLER_THREADS;
				}
			}
		} else {
			// adjust
			$curthreads = $this->_cur_threads;
			if ($curload >= $this->_crawler_conf['load_limit'] + 1) {
				sleep(5); // sleep 5 secs
				if ($curthreads >= 1) {
					$curthreads--;
				}
			} elseif ($curload >= $this->_crawler_conf['load_limit']) {
				// if ( $curthreads > 1 ) {// if already 1, keep
				$curthreads--;
				// }
			} elseif ($curload + 1 < $this->_crawler_conf['load_limit']) {
				if ($curthreads < $CRAWLER_THREADS) {
					$curthreads++;
				}
			}
		}

// $log = 'set current threads = ' . $curthreads . ' previous=' . $this->_cur_threads
		// 	. ' max_allowed=' . $CRAWLER_THREADS . ' load_limit=' . $this->_crawler_conf[ 'load_limit' ] . ' current_load=' . $curload;

$this->_cur_threads = $curthreads;
		$this->_cur_thread_time = time();
	}

/**
	 * Mark running status
	 *
	 * @since  1.1.0
	 * @access private
	 */
	private function _prepare_running()
	{
		$this->_summary['is_running'] = time();
		$this->_summary['done'] = 0; // reset done status
		$this->_summary['last_status'] = 'prepare running';
		$this->_summary['last_crawled'] = 0;

// Current crawler starttime mark
		if ($this->_summary['last_pos'] == 0) {
			$this->_summary['curr_crawler_beginning_time'] = time();
		}

if ($this->_summary['curr_crawler'] == 0 && $this->_summary['last_pos'] == 0) {
			$this->_summary['this_full_beginning_time'] = time();
			$this->_summary['list_size'] = $this->cls('Crawler_Map')->count_map();
		}

if ($this->_summary['end_reason'] == 'end' && $this->_summary['last_pos'] == 0) {
			$this->_summary['crawler_stats'][$this->_summary['curr_crawler']] = array();
		}

self::save_summary();
	}

/**
	 * Take over lane
	 * @since 6.1
	 */
	private function _take_over_lane()
	{
		self::debug('Take over lane as lane is free: ' . $this->json_local_path() . '.pid');
		file::save($this->json_local_path() . '.pid', LITESPEED_LANE_HASH);
	}

/**
	 * Update lane file
	 * @since 6.1
	 */
	private function _touch_lane()
	{
		touch($this->json_local_path() . '.pid');
	}

/**
	 * Release lane file
	 * @since 6.1
	 */
	public function Release_lane()
	{
		$lane_file = $this->json_local_path() . '.pid';
		if (!file_exists($lane_file)) {
			return;
		}

self::debug('Release lane');
		unlink($lane_file);
	}

/**
	 * Check if lane is used by other crawlers
	 * @since 6.1
	 */
	private function _check_valid_lane($strict_mode = false)
	{
		// Check lane hash
		$lane_file = $this->json_local_path() . '.pid';
		if ($strict_mode) {
			if (!file_exists($lane_file)) {
				self::debug("lane file not existed, strict mode is false [file] $lane_file");
				return false;
			}
		}
		$pid = file::read($lane_file);
		if ($pid && LITESPEED_LANE_HASH != $pid) {
			// If lane file is older than 1h, ignore
			if (time() - filemtime($lane_file) > 3600) {
				self::debug('Lane file is older than 1h, releasing lane');
				$this->Release_lane();
				return true;
			}
			return false;
		}
		return true;
	}

/**
	 * Test port for simulator
	 *
	 * @since  7.0
	 * @access private
	 * @return bool true if success and can continue crawling, false if failed and need to stop
	 */
	private function _test_port()
	{
		if (empty($this->_crawler_conf['cookies']) || empty($this->_crawler_conf['cookies']['litespeed_hash'])) {
			return true;
		}
		if (!$this->_server_ip) {
			self::debug('❌ Server IP not set');
			return false;
		}
		if (defined('LITESPEED_CRAWLER_LOCAL_PORT')) {
			self::debug('✅ LITESPEED_CRAWLER_LOCAL_PORT already defined');
			return true;
		}
		// Don't repeat testing in 120s
		if (!empty($this->_summary['test_port_tts']) && time() - $this->_summary['test_port_tts'] < 120) {
			if (!empty($this->_summary['test_port'])) {
				self::debug('✅ Use tested local port: ' . $this->_summary['test_port']);
				define('LITESPEED_CRAWLER_LOCAL_PORT', $this->_summary['test_port']);
				return true;
			}
			return false;
		}
		$this->_summary['test_port_tts'] = time();
		self::save_summary();

$options = $this->_get_curl_options();
		$home = home_url();
		File::save(LITESPEED_STATIC_DIR . '/crawler/test_port.txt', $home, true);
		$url = LITESPEED_STATIC_URL . '/crawler/test_port.txt';
		$parsed_url = parse_url($url);
		if (empty($parsed_url['host'])) {
			self::debug('❌ Test port failed, invalid URL: ' . $url);
			return false;
		}
		$resolved = $parsed_url['host'] . ':443:' . $this->_server_ip;
		$options[CURLOPT_RESOLVE] = array($resolved);
		$options[CURLOPT_DNS_USE_GLOBAL_CACHE] = false;
		$options[CURLOPT_HEADER] = false;
		self::debug('Test local 443 port for ' . $resolved);

$ch = curl_init();
		curl_setopt_array($ch, $options);
		curl_setopt($ch, CURLOPT_URL, $url);
		$result = curl_exec($ch);
		$test_result = false;
		if (curl_errno($ch) || $result !== $home) {
			if (curl_errno($ch)) {
				self::debug('❌ Test port curl error: [errNo] ' . curl_errno($ch) . ' [err] ' . curl_error($ch));
			} elseif ($result !== $home) {
				self::debug('❌ Test port response is wrong: ' . $result);
			}
			self::debug('❌ Test local 443 port failed, try port 80');

// Try port 80
			$resolved = $parsed_url['host'] . ':80:' . $this->_server_ip;
			$options[CURLOPT_RESOLVE] = array($resolved);
			$url = str_replace('https://', 'http://', $url);
			if (!in_array('X-Forwarded-Proto: https', $options[CURLOPT_HTTPHEADER])) {
				$options[CURLOPT_HTTPHEADER][] = 'X-Forwarded-Proto: https';
			}
			// $options[CURLOPT_HTTPHEADER][] = 'X-Forwarded-SSL: on';
			$ch = curl_init();
			curl_setopt_array($ch, $options);
			curl_setopt($ch, CURLOPT_URL, $url);
			$result = curl_exec($ch);
			if (curl_errno($ch)) {
				self::debug('❌ Test port curl error: [errNo] ' . curl_errno($ch) . ' [err] ' . curl_error($ch));
			} elseif ($result !== $home) {
				self::debug('❌ Test port response is wrong: ' . $result);
			} else {
				self::debug('✅ Test local 80 port successfully');
				define('LITESPEED_CRAWLER_LOCAL_PORT', 80);
				$this->_summary['test_port'] = 80;
				$test_result = true;
			}
			// self::debug('Response data: ' . $result);
			// $this->Release_lane();
			// exit($result);
		} else {
			self::debug('✅ Tested local 443 port successfully');
			define('LITESPEED_CRAWLER_LOCAL_PORT', 443);
			$this->_summary['test_port'] = 443;
			$test_result = true;
		}
		self::save_summary();
		curl_close($ch);
		return $test_result;
	}

/**
	 * Run crawler
	 *
	 * @since  1.1.0
	 * @access private
	 */
	private function _do_running()
	{
		$options = $this->_get_curl_options(true);

// If is role simulator and not defined local port, check port once
		$test_result = $this->_test_port();
		if (!$test_result) {
			$this->_end_reason = 'port_test_failed';
			self::debug('❌ Test port failed, crawler stopped.');
			return;
		}

while ($urlChunks = $this->cls('Crawler_Map')->list_map(self::CHUNKS, $this->_summary['last_pos'])) {
			// self::debug('$urlChunks=' . count($urlChunks) . ' $this->_cur_threads=' . $this->_cur_threads);
			// start crawling
			$urlChunks = array_chunk($urlChunks, $this->_cur_threads);
			// self::debug('$urlChunks after array_chunk: ' . count($urlChunks));
			foreach ($urlChunks as $rows) {
				if (!$this->_check_valid_lane(true)) {
					$this->_end_reason = 'lane_invalid';
					self::debug('🛑 The crawler lane is used by newer crawler.');
					throw new \Exception('invalid crawler lane');
				}
				// Update time
				$this->_touch_lane();

// self::debug('chunk fetching count($rows)= ' . count($rows));
				// multi curl
				$rets = $this->_multi_request($rows, $options);

// check result headers
				foreach ($rows as $row) {
					// self::debug('chunk fetching 553');
					if (empty($rets[$row['id']])) {
						// If already in blacklist, no curl happened, no corresponding record
						continue;
					}
					// self::debug('chunk fetching 557');
					// check response
					if ($rets[$row['id']]['code'] == 428) {
						// HTTP/1.1 428 Precondition Required (need to test)
						$this->_end_reason = 'crawler_disabled';
						self::debug('crawler_disabled');
						return;
					}

$status = $this->_status_parse($rets[$row['id']]['header'], $rets[$row['id']]['code'], $row['url']); // B or H or M or N(nocache)
					self::debug('[status] ' . $this->_status2title($status) . "\t\t [url] " . $row['url']);
					$this->_map_status_list[$status][$row['id']] = array(
						'url' => $row['url'],
						'code' => $rets[$row['id']]['code'], // 201 or 200 or 404
					);
					if (empty($this->_summary['crawler_stats'][$this->_summary['curr_crawler']][$status])) {
						$this->_summary['crawler_stats'][$this->_summary['curr_crawler']][$status] = 0;
					}
					$this->_summary['crawler_stats'][$this->_summary['curr_crawler']][$status]++;
				}

// update offset position
				$_time = time();
				$this->_summary['last_count'] = count($rows);
				$this->_summary['last_pos'] += $this->_summary['last_count'];
				$this->_summary['last_crawled'] += $this->_summary['last_count'];
				$this->_summary['last_update_time'] = $_time;
				$this->_summary['last_status'] = 'updated position';
				// self::debug("chunk fetching 604 last_pos:{$this->_summary['last_pos']} last_count:{$this->_summary['last_count']} last_crawled:{$this->_summary['last_crawled']}");
				// check duration
				if ($this->_summary['last_update_time'] > $this->_max_run_time) {
					$this->_end_reason = 'stopped_maxtime';
					self::debug('Terminated due to maxtime');
					return;
					// return __('Stopped due to exceeding defined Maximum Run Time', 'litespeed-cache');
				}

// make sure at least each 10s save meta & map status once
				if ($_time - $this->_summary['meta_save_time'] > 10) {
					$this->_map_status_list = $this->cls('Crawler_Map')->save_map_status($this->_map_status_list, $this->_summary['curr_crawler']);
					self::save_summary();
				}
				// self::debug('chunk fetching 597');
				// check if need to reset pos each 5s
				if ($_time > $this->_summary['pos_reset_check']) {
					$this->_summary['pos_reset_check'] = $_time + 5;
					if (file_exists($this->_resetfile) && unlink($this->_resetfile)) {
						self::debug('Terminated due to reset file');

$this->_summary['last_pos'] = 0;
						$this->_summary['curr_crawler'] = 0;
						$this->_summary['crawler_stats'][$this->_summary['curr_crawler']] = array();
						// reset done status
						$this->_summary['done'] = 0;
						$this->_summary['this_full_beginning_time'] = 0;
						$this->_end_reason = 'stopped_reset';
						return;
						// return __('Stopped due to reset meta position', 'litespeed-cache');
					}
				}
				// self::debug('chunk fetching 615');
				// check loads
				if ($this->_summary['last_update_time'] - $this->_cur_thread_time > 60) {
					$this->_adjust_current_threads();
					if ($this->_cur_threads == 0) {
						$this->_end_reason = 'stopped_highload';
						self::debug('🛑 Terminated due to highload');
						return;
						// return __('Stopped due to load over limit', 'litespeed-cache');
					}
				}

$this->_summary['last_status'] = 'sleeping ' . $this->_crawler_conf['run_delay'] . 'ms';

usleep($this->_crawler_conf['run_delay']);
			}
			// self::debug('chunk fetching done');
		}

// All URLs are done for current crawler
		$this->_end_reason = 'end';
		$this->_summary['crawler_stats'][$this->_summary['curr_crawler']]['W'] = 0;
		self::debug('Crawler #' . $this->_summary['curr_crawler'] . ' touched end');
	}

/**
	 * Send multi curl requests
	 * If res=B, bypass request and won't return
	 *
	 * @since  1.1.0
	 * @access private
	 */
	private function _multi_request($rows, $options)
	{
		if (!function_exists('curl_multi_init')) {
			exit('curl_multi_init disabled');
		}
		$mh = curl_multi_init();
		$CRAWLER_DROP_DOMAIN = defined('LITESPEED_CRAWLER_DROP_DOMAIN') ? LITESPEED_CRAWLER_DROP_DOMAIN : false;
		$curls = array();
		foreach ($rows as $row) {
			if (substr($row['res'], $this->_summary['curr_crawler'], 1) == self::STATUS_BLACKLIST) {
				continue;
			}
			if (substr($row['res'], $this->_summary['curr_crawler'], 1) == self::STATUS_NOCACHE) {
				continue;
			}

if (!function_exists('curl_init')) {
				exit('curl_init disabled');
			}

$curls[$row['id']] = curl_init();

// Append URL
			$url = $row['url'];
			if ($CRAWLER_DROP_DOMAIN) {
				$url = $this->_crawler_conf['base'] . $row['url'];
			}

// IP resolve
			if (!empty($this->_crawler_conf['cookies']) && !empty($this->_crawler_conf['cookies']['litespeed_hash'])) {
				$parsed_url = parse_url($url);
				// self::debug('Crawl role simulator, required to use localhost for resolve');

if (!empty($parsed_url['host'])) {
					$dom = $parsed_url['host'];
					$port = defined('LITESPEED_CRAWLER_LOCAL_PORT') ? LITESPEED_CRAWLER_LOCAL_PORT : '443';
					$resolved = $dom . ':' . $port . ':' . $this->_server_ip;
					$options[CURLOPT_RESOLVE] = array($resolved);
					$options[CURLOPT_DNS_USE_GLOBAL_CACHE] = false;
					// $options[CURLOPT_PORT] = $port;
					if ($port == 80) {
						$url = str_replace('https://', 'http://', $url);
						if (!in_array('X-Forwarded-Proto: https', $options[CURLOPT_HTTPHEADER])) {
							$options[CURLOPT_HTTPHEADER][] = 'X-Forwarded-Proto: https';
						}
					}
					self::debug('Resolved DNS for ' . $resolved);
				}
			}

curl_setopt($curls[$row['id']], CURLOPT_URL, $url);
			self::debug('Crawling [url] ' . $url . ($url == $row['url'] ? '' : ' [ori] ' . $row['url']));

curl_setopt_array($curls[$row['id']], $options);

curl_multi_add_handle($mh, $curls[$row['id']]);
		}

// execute curl
		if ($curls) {
			do {
				$status = curl_multi_exec($mh, $active);
				if ($active) {
					curl_multi_select($mh);
				}
			} while ($active && $status == CURLM_OK);
		}

// curl done
		$ret = array();
		foreach ($rows as $row) {
			if (substr($row['res'], $this->_summary['curr_crawler'], 1) == self::STATUS_BLACKLIST) {
				continue;
			}
			if (substr($row['res'], $this->_summary['curr_crawler'], 1) == self::STATUS_NOCACHE) {
				continue;
			}
			// self::debug('-----debug3');
			$ch = $curls[$row['id']];

// Parse header
			$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
			$content = curl_multi_getcontent($ch);
			$header = substr($content, 0, $header_size);

$ret[$row['id']] = array(
				'header' => $header,
				'code' => curl_getinfo($ch, CURLINFO_HTTP_CODE),
			);
			// self::debug('-----debug4');
			curl_multi_remove_handle($mh, $ch);
			curl_close($ch);
		}
		// self::debug('-----debug5');
		curl_multi_close($mh);
		// self::debug('-----debug6');
		return $ret;
	}

/**
	 * Translate the status to title
	 * @since 6.0
	 */
	private function _status2title($status)
	{
		if ($status == self::STATUS_HIT) {
			return '✅ Hit';
		}
		if ($status == self::STATUS_MISS) {
			return '😊 Miss';
		}
		if ($status == self::STATUS_BLACKLIST) {
			return '😅 Blacklisted';
		}
		if ($status == self::STATUS_NOCACHE) {
			return '😅 Blacklisted';
		}
		return '🛸 Unknown';
	}

/**
	 * Check returned curl header to find if cached or not
	 *
	 * @since  2.0
	 * @access private
	 */
	private function _status_parse($header, $code, $url)
	{
		// self::debug('http status code: ' . $code . ' [headers]', $header);
		if ($code == 201) {
			return self::STATUS_HIT;
		}

if (stripos($header, 'X-Litespeed-Cache-Control: no-cache') !== false) {
			// If is from DIVI, taken as miss
			if (defined('LITESPEED_CRAWLER_IGNORE_NONCACHEABLE') && LITESPEED_CRAWLER_IGNORE_NONCACHEABLE) {
				return self::STATUS_MISS;
			}

// If blacklist is disabled
			if ((defined('LITESPEED_CRAWLER_DISABLE_BLOCKLIST') && LITESPEED_CRAWLER_DISABLE_BLOCKLIST) || apply_filters('litespeed_crawler_disable_blocklist', false, $url)) {
				return self::STATUS_MISS;
			}

return self::STATUS_NOCACHE; // Blacklist
		}

$_cache_headers = array('x-qc-cache', 'x-lsadc-cache', 'x-litespeed-cache');

foreach ($_cache_headers as $_header) {
			if (stripos($header, $_header) !== false) {
				if (stripos($header, $_header . ': miss') !== false) {
					return self::STATUS_MISS; // Miss
				}
				return self::STATUS_HIT; // Hit
			}
		}

// If blacklist is disabled
		if ((defined('LITESPEED_CRAWLER_DISABLE_BLOCKLIST') && LITESPEED_CRAWLER_DISABLE_BLOCKLIST) || apply_filters('litespeed_crawler_disable_blocklist', false, $url)) {
			return self::STATUS_MISS;
		}

return self::STATUS_BLACKLIST; // Blacklist
	}

/**
	 * Get curl_options
	 *
	 * @since  1.1.0
	 * @access private
	 */
	private function _get_curl_options($crawler_only = false)
	{
		$CRAWLER_TIMEOUT = defined('LITESPEED_CRAWLER_TIMEOUT') ? LITESPEED_CRAWLER_TIMEOUT : 30;
		$options = array(
			CURLOPT_RETURNTRANSFER => true,
			CURLOPT_HEADER => true,
			CURLOPT_CUSTOMREQUEST => 'GET',
			CURLOPT_FOLLOWLOCATION => false,
			CURLOPT_ENCODING => 'gzip',
			CURLOPT_CONNECTTIMEOUT => 10,
			CURLOPT_TIMEOUT => $CRAWLER_TIMEOUT, // Larger timeout to avoid incorrect blacklist addition #900171
			CURLOPT_SSL_VERIFYHOST => 0,
			CURLOPT_SSL_VERIFYPEER => false,
			CURLOPT_NOBODY => false,
			CURLOPT_HTTPHEADER => $this->_crawler_conf['headers'],
		);
		$options[CURLOPT_HTTPHEADER][] = 'Cache-Control: max-age=0';

/**
		 * Try to enable http2 connection (only available since PHP7+)
		 * @since  1.9.1
		 * @since  2.2.7 Commented due to cause no-cache issue
		 * @since  2.9.1+ Fixed wrongly usage of CURL_HTTP_VERSION_1_1 const
		 */
		$options[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_1;
		// 	$options[ CURL_HTTP_VERSION_2 ] = 1;

// if is walker
		// $options[ CURLOPT_FRESH_CONNECT ] = true;

// Referer
		if (isset($_SERVER['HTTP_HOST']) && isset($_SERVER['REQUEST_URI'])) {
			$options[CURLOPT_REFERER] = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
		}

// User Agent
		if ($crawler_only) {
			if (strpos($this->_crawler_conf['ua'], Crawler::FAST_USER_AGENT) !== 0) {
				$this->_crawler_conf['ua'] = Crawler::FAST_USER_AGENT . ' ' . $this->_crawler_conf['ua'];
			}
		}
		$options[CURLOPT_USERAGENT] = $this->_crawler_conf['ua'];

// Cookies
		$cookies = array();
		foreach ($this->_crawler_conf['cookies'] as $k => $v) {
			if (!$v) {
				continue;
			}
			$cookies[] = $k . '=' . urlencode($v);
		}
		if ($cookies) {
			$options[CURLOPT_COOKIE] = implode('; ', $cookies);
		}

return $options;
	}

/**
	 * Self curl to get HTML content
	 *
	 * @since  3.3
	 */
	public function self_curl($url, $ua, $uid = false, $accept = false)
	{
		// $accept not in use yet
		$this->_crawler_conf['base'] = home_url();
		$this->_crawler_conf['ua'] = $ua;
		if ($accept) {
			$this->_crawler_conf['headers'] = array('Accept: ' . $accept);
		}
		$options = $this->_get_curl_options();

if ($uid) {
			$this->_crawler_conf['cookies']['litespeed_flash_hash'] = Router::cls()->get_flash_hash($uid);
			$parsed_url = parse_url($url);

$options[CURLOPT_HEADER] = false;
		$options[CURLOPT_FOLLOWLOCATION] = true;

$ch = curl_init();
		curl_setopt_array($ch, $options);
		curl_setopt($ch, CURLOPT_URL, $url);
		$result = curl_exec($ch);
		$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
		curl_close($ch);

if ($code != 200) {
			self::debug('❌ Response code is not 200 in self_curl() [code] ' . var_export($code, true));
			return false;
		}

return $result;
	}

/**
	 * Terminate crawling
	 *
	 * @since  1.1.0
	 * @access private
	 */
	private function _terminate_running()
	{
		$this->_map_status_list = $this->cls('Crawler_Map')->save_map_status($this->_map_status_list, $this->_summary['curr_crawler']);

if ($this->_end_reason == 'end') {
			// Current crawler is fully done
			// $end_reason = sprintf( __( 'Crawler %s reached end of sitemap file.', 'litespeed-cache' ), '#' . ( $this->_summary['curr_crawler'] + 1 ) );
			$this->_summary['curr_crawler']++; // Jump to next crawler
			// $this->_summary[ 'crawler_stats' ][ $this->_summary[ 'curr_crawler' ] ] = array(); // reset this at next crawl time
			$this->_summary['last_pos'] = 0; // reset last position
			$this->_summary['last_crawler_total_cost'] = time() - $this->_summary['curr_crawler_beginning_time'];
			$count_crawlers = count($this->list_crawlers());
			if ($this->_summary['curr_crawler'] >= $count_crawlers) {
				self::debug('_terminate_running Touched end, whole crawled. Reload crawler!');
				$this->_summary['curr_crawler'] = 0;
				// $this->_summary[ 'crawler_stats' ][ $this->_summary[ 'curr_crawler' ] ] = array();
				$this->_summary['done'] = 'touchedEnd'; // log done status
				$this->_summary['last_full_time_cost'] = time() - $this->_summary['this_full_beginning_time'];
			}
		}
		$this->_summary['last_status'] = 'stopped';
		$this->_summary['is_running'] = 0;
		$this->_summary['end_reason'] = $this->_end_reason;
		self::save_summary();
	}

/**
	 * List all crawlers ( tagA => [ valueA => titleA, ... ] ...)
	 *
	 * @since    1.9.1
	 * @access   public
	 */
	public function list_crawlers()
	{
		if ($this->_crawlers) {
			return $this->_crawlers;
		}

$crawler_factors = array();

// Add default Guest crawler
		$crawler_factors['uid'] = array(0 => __('Guest', 'litespeed-cache'));

// WebP on/off
		if ($this->conf(Base::O_IMG_OPTM_WEBP)) {
			$crawler_factors['webp'] = array(1 => $this->cls('Media')->next_gen_image_title());
			if (apply_filters('litespeed_crawler_webp', false)) {
				$crawler_factors['webp'][0] = '';
			}
		}

// Guest Mode on/off
		if ($this->conf(Base::O_GUEST)) {
			$vary_name = $this->cls('Vary')->get_vary_name();
			$vary_val = 'guest_mode:1';
			if (!defined('LSCWP_LOG')) {
				$vary_val = md5($this->conf(Base::HASH) . $vary_val);
			}
			$crawler_factors['cookie:' . $vary_name] = array($vary_val => '', '_null' => '<font data-balloon-pos="up" aria-label="Guest Mode">👒</font>');
		}

// Mobile crawler
		if ($this->conf(Base::O_CACHE_MOBILE)) {
			$crawler_factors['mobile'] = array(1 => '<font data-balloon-pos="up" aria-label="Mobile">📱</font>', 0 => '');
		}

// Get roles set
		// List all roles
		foreach ($this->conf(Base::O_CRAWLER_ROLES) as $v) {
			$role_title = '';
			$udata = get_userdata($v);
			if (isset($udata->roles) && is_array($udata->roles)) {
				$tmp = array_values($udata->roles);
				$role_title = array_shift($tmp);
			}
			if (!$role_title) {
				continue;
			}

$crawler_factors['uid'][$v] = ucfirst($role_title);
		}

// Cookie crawler
		foreach ($this->conf(Base::O_CRAWLER_COOKIES) as $v) {
			if (empty($v['name'])) {
				continue;
			}

$this_cookie_key = 'cookie:' . $v['name'];

$crawler_factors[$this_cookie_key] = array();

foreach ($v['vals'] as $v2) {
				$crawler_factors[$this_cookie_key][$v2] =
					$v2 == '_null' ? '' : '<font data-balloon-pos="up" aria-label="Cookie">🍪</font>' . esc_html($v['name']) . '=' . esc_html($v2);
			}
		}

// Crossing generate the crawler list
		$this->_crawlers = $this->_recursive_build_crawler($crawler_factors);

return $this->_crawlers;
	}

/**
	 * Build a crawler list recursively
	 *
	 * @since 2.8
	 * @access private
	 */
	private function _recursive_build_crawler($crawler_factors, $group = array(), $i = 0)
	{
		$current_factor = array_keys($crawler_factors);
		$current_factor = $current_factor[$i];

$if_touch_end = $i + 1 >= count($crawler_factors);

$final_list = array();

foreach ($crawler_factors[$current_factor] as $k => $v) {
			// Don't alter $group bcos of loop usage
			$item = $group;
			$item['title'] = !empty($group['title']) ? $group['title'] : '';
			if ($v) {
				if ($item['title']) {
					$item['title'] .= ' - ';
				}
				$item['title'] .= $v;
			}
			$item[$current_factor] = $k;

if ($if_touch_end) {
				$final_list[] = $item;
			} else {
				// Inception: next layer
				$final_list = array_merge($final_list, $this->_recursive_build_crawler($crawler_factors, $item, $i + 1));
			}
		}

return $final_list;
	}

/**
	 * Return crawler meta file local path
	 *
	 * @since    6.1
	 * @access public
	 */
	public function json_local_path()
	{
		// if (!file_exists(LITESPEED_STATIC_DIR . '/crawler/' . $this->_sitemeta)) {
		// 	return false;
		// }

return LITESPEED_STATIC_DIR . '/crawler/' . $this->_sitemeta;
	}

/**
	 * Return crawler meta file
	 *
	 * @since    1.1.0
	 * @access public
	 */
	public function json_path()
	{
		if (!file_exists(LITESPEED_STATIC_DIR . '/crawler/' . $this->_sitemeta)) {
			return false;
		}

return LITESPEED_STATIC_URL . '/crawler/' . $this->_sitemeta;
	}

/**
	 * Create reset pos file
	 *
	 * @since    1.1.0
	 * @access public
	 */
	public function reset_pos()
	{
		File::save($this->_resetfile, time(), true);

self::save_summary(array('is_running' => 0));
	}

/**
	 * Display status based by matching crawlers order
	 *
	 * @since  3.0
	 * @access public
	 */
	public function display_status($status_row, $reason_set)
	{
		if (!$status_row) {
			return '';
		}

$_status_list = array(
			'-' => 'default',
			self::STATUS_MISS => 'primary',
			self::STATUS_HIT => 'success',
			self::STATUS_BLACKLIST => 'danger',
			self::STATUS_NOCACHE => 'warning',
		);

$reason_set = explode(',', $reason_set);

$status = '';
		foreach (str_split($status_row) as $k => $v) {
			$reason = $reason_set[$k];
			if ($reason == 'Man') {
				$reason = __('Manually added to blocklist', 'litespeed-cache');
			}
			if ($reason == 'Existed') {
				$reason = __('Previously existed in blocklist', 'litespeed-cache');
			}
			if ($reason) {
				$reason = 'data-balloon-pos="up" aria-label="' . $reason . '"';
			}
			$status .= '<i class="litespeed-dot litespeed-bg-' . $_status_list[$v] . '" ' . $reason . '>' . ($k + 1) . '</i>';
		}

return $status;
	}

/**
	 * Output info and exit
	 *
	 * @since    1.1.0
	 * @access protected
	 * @param  string $error Error info
	 */
	protected function output($msg)
	{
		if (defined('DOING_CRON')) {
			echo $msg;
			// exit();
		} else {
			echo "<script>alert('" . htmlspecialchars($msg) . "');</script>";
			// exit;
		}
	}

/**
	 * Handle all request actions from main cls
	 *
	 * @since  3.0
	 * @access public
	 */
	public function handler()
	{
		$type = Router::verify_type();

switch ($type) {
			case self::TYPE_REFRESH_MAP:
				$this->cls('Crawler_Map')->gen(true);
				break;

case self::TYPE_EMPTY:
				$this->cls('Crawler_Map')->empty_map();
				break;

case self::TYPE_BLACKLIST_EMPTY:
				$this->cls('Crawler_Map')->blacklist_empty();
				break;

case self::TYPE_BLACKLIST_DEL:
				if (!empty($_GET['id'])) {
					$this->cls('Crawler_Map')->blacklist_del($_GET['id']);
				}
				break;

case self::TYPE_BLACKLIST_ADD:
				if (!empty($_GET['id'])) {
					$this->cls('Crawler_Map')->blacklist_add($_GET['id']);
				}
				break;

case self::TYPE_START: // Handle the ajax request to proceed crawler manually by admin
				self::start_async();
				break;

case self::TYPE_RESET:
				$this->reset_pos();
				break;

default:
				break;
		}

Admin::redirect();
	}
}

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