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Editing: ucss.cls.php
<?php /** * The ucss class. * * @since 5.1 * @package LiteSpeed */ namespace LiteSpeed; defined( 'WPINC' ) || exit(); /** * UCSS optimization class. * * @since 5.1 */ class UCSS extends Base { const LOG_TAG = '[UCSS]'; const TYPE_GEN = 'gen'; const TYPE_CLEAR_Q = 'clear_q'; /** * Summary data. * * @var array */ protected $_summary; /** * UCSS whitelist selectors. * * @var array */ private $_ucss_whitelist; /** * Queue for UCSS generation. * * @var array */ private $_queue; /** * Init * * @since 3.0 */ public function __construct() { $this->_summary = self::get_summary(); add_filter( 'litespeed_ucss_whitelist', [ $this->cls( 'Data' ), 'load_ucss_whitelist' ] ); } /** * Uniform url tag for ucss usage * * @since 4.7 * * @param string|false $request_url The request URL. * @return string The URL tag. */ public static function get_url_tag( $request_url = false ) { $url_tag = $request_url; if (is_404()) { $url_tag = '404'; } elseif (apply_filters('litespeed_ucss_per_pagetype', false)) { $url_tag = Utility::page_type(); self::debug('litespeed_ucss_per_pagetype filter altered url to ' . $url_tag); } return $url_tag; } /** * Get UCSS path * * @since 4.0 * * @param string $request_url The request URL. * @param bool $dry_run Whether to run in dry mode. * @return string|false The UCSS filename or false. */ public function load( $request_url, $dry_run = false ) { // Check UCSS URI excludes $ucss_exc = apply_filters( 'litespeed_ucss_exc', $this->conf( self::O_OPTM_UCSS_EXC ) ); $hit = $ucss_exc ? Utility::str_hit_array( $request_url, $ucss_exc ) : false; if ( $hit ) { self::debug( 'UCSS bypassed due to UCSS URI Exclude setting: ' . $hit ); Core::comment( 'QUIC.cloud UCSS bypassed by setting' ); return false; } $filepath_prefix = $this->_build_filepath_prefix('ucss'); $url_tag = self::get_url_tag($request_url); $vary = $this->cls('Vary')->finalize_full_varies(); $filename = $this->cls('Data')->load_url_file($url_tag, $vary, 'ucss'); if ($filename) { $static_file = LITESPEED_STATIC_DIR . $filepath_prefix . $filename . '.css'; if (file_exists($static_file)) { self::debug2('existing ucss ' . $static_file); // Check if is error comment inside only $tmp = File::read($static_file); if ( '/*' === substr( $tmp, 0, 2 ) && '*/' === substr( trim( $tmp ), -2 ) ) { self::debug2('existing ucss is error only: ' . $tmp); Core::comment('QUIC.cloud UCSS bypassed due to generation error ❌ ' . $filepath_prefix . $filename . '.css'); return false; } Core::comment('QUIC.cloud UCSS loaded ✅ ' . $filepath_prefix . $filename . '.css' ); return $filename . '.css'; } } if ($dry_run) { return false; } Core::comment('QUIC.cloud UCSS in queue'); $uid = get_current_user_id(); $ua = $this->_get_ua(); // Store it for cron $this->_queue = $this->load_queue('ucss'); if (count($this->_queue) > 500) { self::debug('UCSS Queue is full - 500'); return false; } $queue_k = (strlen($vary) > 32 ? md5($vary) : $vary) . ' ' . $url_tag; $this->_queue[ $queue_k ] = [ 'url' => apply_filters( 'litespeed_ucss_url', $request_url ), 'user_agent' => substr( $ua, 0, 200 ), 'is_mobile' => $this->_separate_mobile(), 'is_webp' => $this->cls( 'Media' )->webp_support() ? 1 : 0, 'uid' => $uid, 'vary' => $vary, 'url_tag' => $url_tag, ]; // Current UA will be used to request $this->save_queue('ucss', $this->_queue); self::debug('Added queue_ucss [url_tag] ' . $url_tag . ' [UA] ' . $ua . ' [vary] ' . $vary . ' [uid] ' . $uid); // Prepare cache tag for later purge Tag::add('UCSS.' . md5($queue_k)); return false; } /** * Get User Agent * * @since 5.3 * * @return string The user agent string. */ private function _get_ua() { return ! empty( $_SERVER['HTTP_USER_AGENT'] ) ? sanitize_text_field( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) ) : ''; } /** * Add rows to q * * @since 5.3 * * @param array $url_files Array of URL file data. * @return false|void False if queue is full. */ public function add_to_q( $url_files ) { // Store it for cron $this->_queue = $this->load_queue('ucss'); if (count($this->_queue) > 500) { self::debug('UCSS Queue is full - 500'); return false; } $ua = $this->_get_ua(); foreach ($url_files as $url_file) { $vary = $url_file['vary']; $request_url = $url_file['url']; $is_mobile = $url_file['mobile']; $is_webp = $url_file['webp']; $url_tag = self::get_url_tag($request_url); $queue_k = (strlen($vary) > 32 ? md5($vary) : $vary) . ' ' . $url_tag; $q = [ 'url' => apply_filters( 'litespeed_ucss_url', $request_url ), 'user_agent' => substr( $ua, 0, 200 ), 'is_mobile' => $is_mobile, 'is_webp' => $is_webp, 'uid' => false, 'vary' => $vary, 'url_tag' => $url_tag, ]; // Current UA will be used to request self::debug('Added queue_ucss [url_tag] ' . $url_tag . ' [UA] ' . $ua . ' [vary] ' . $vary . ' [uid] false'); $this->_queue[$queue_k] = $q; } $this->save_queue('ucss', $this->_queue); } /** * Generate UCSS * * @since 4.0 * * @param bool $keep_going Whether to continue processing. * @return mixed The cron handler result. */ public static function cron( $keep_going = false ) { $_instance = self::cls(); return $_instance->_cron_handler( $keep_going ); } /** * Handle UCSS cron * * @since 4.2 * * @param bool $keep_going Whether to continue processing. * @return mixed The redirect result or void. */ private function _cron_handler( $keep_going ) { $this->_queue = $this->load_queue( 'ucss' ); if ( empty( $this->_queue ) ) { return; } // For cron, need to check request interval too if ( ! $keep_going ) { if (!empty($this->_summary['curr_request']) && time() - $this->_summary['curr_request'] < 300 && !$this->conf(self::O_DEBUG)) { self::debug('Last request not done'); return; } } $i = 0; foreach ($this->_queue as $k => $v) { if (!empty($v['_status'])) { continue; } self::debug('cron job [tag] ' . $k . ' [url] ' . $v['url'] . ($v['is_mobile'] ? ' 📱 ' : '') . ' [UA] ' . $v['user_agent']); if (!isset($v['is_webp'])) { $v['is_webp'] = false; } ++$i; $res = $this->_send_req($v['url'], $k, $v['uid'], $v['user_agent'], $v['vary'], $v['url_tag'], $v['is_mobile'], $v['is_webp']); if (!$res) { // Status is wrong, drop this this->_queue $this->_queue = $this->load_queue('ucss'); unset($this->_queue[$k]); $this->save_queue('ucss', $this->_queue); if ( ! $keep_going ) { return; } if ( $i > 3 ) { GUI::print_loading( count( $this->_queue ), 'UCSS' ); return Router::self_redirect( Router::ACTION_UCSS, self::TYPE_GEN ); } continue; } // Exit queue if out of quota or service is hot if ( 'out_of_quota' === $res || 'svc_hot' === $res ) { return; } $this->_queue = $this->load_queue( 'ucss' ); $this->_queue[ $k ]['_status'] = 'requested'; $this->save_queue( 'ucss', $this->_queue ); self::debug( 'Saved to queue [k] ' . $k ); // only request first one if ( ! $keep_going ) { return; } if ($i > 3) { GUI::print_loading(count($this->_queue), 'UCSS'); return Router::self_redirect(Router::ACTION_UCSS, self::TYPE_GEN); } } } /** * Send to QC API to generate UCSS * * @since 2.3 * @access private * * @param string $request_url The request URL. * @param string $queue_k The queue key. * @param int|false $uid The user ID. * @param string $user_agent The user agent. * @param string $vary The vary string. * @param string $url_tag The URL tag. * @param bool $is_mobile Whether is mobile. * @param bool $is_webp Whether supports webp. * @return string|bool|null The result status. */ private function _send_req( $request_url, $queue_k, $uid, $user_agent, $vary, $url_tag, $is_mobile, $is_webp ) { // Check if has credit to push or not $err = false; $allowance = $this->cls('Cloud')->allowance(Cloud::SVC_UCSS, $err); if (!$allowance) { self::debug('❌ No credit: ' . $err); $err && Admin_Display::error(Error::msg($err)); return 'out_of_quota'; } set_time_limit(120); // Update css request status $this->_summary['curr_request'] = time(); self::save_summary(); // Gather guest HTML to send $html = $this->cls('CSS')->prepare_html($request_url, $user_agent, $uid); if (!$html) { return false; } // Parse HTML to gather all CSS content before requesting $css = false; list(, $html) = $this->prepare_css($html, $is_webp, true); // Use this to drop CSS from HTML as we don't need those CSS to generate UCSS $filename = $this->cls('Data')->load_url_file($url_tag, $vary, 'css'); $filepath_prefix = $this->_build_filepath_prefix('css'); $static_file = LITESPEED_STATIC_DIR . $filepath_prefix . $filename . '.css'; self::debug('Checking combined file ' . $static_file); if (file_exists($static_file)) { $css = File::read($static_file); } if (!$css) { self::debug('❌ No combined css'); return false; } $data = [ 'url' => $request_url, 'queue_k' => $queue_k, 'user_agent' => $user_agent, 'is_mobile' => $is_mobile ? 1 : 0, // todo:compatible w/ tablet 'is_webp' => $is_webp ? 1 : 0, 'html' => $html, 'css' => $css, ]; if (!isset($this->_ucss_whitelist)) { $this->_ucss_whitelist = $this->_filter_whitelist(); } $data['whitelist'] = $this->_ucss_whitelist; self::debug('Generating: ', $data); $json = Cloud::post(Cloud::SVC_UCSS, $data, 30); if (!is_array($json)) { return $json; } // Old version compatibility if (empty($json['status'])) { if (!empty($json['ucss'])) { $this->_save_con('ucss', $json['ucss'], $queue_k, $is_mobile, $is_webp); } // Delete the row return false; } // Unknown status, remove this line if ( 'queued' !== $json['status'] ) { return false; } // Save summary data $this->_summary['last_spent'] = time() - $this->_summary['curr_request']; $this->_summary['last_request'] = $this->_summary['curr_request']; $this->_summary['curr_request'] = 0; self::save_summary(); return true; } /** * Save UCSS content * * @since 4.2 * * @param string $type The content type. * @param string $css The CSS content. * @param string $queue_k The queue key. * @param bool $is_mobile Whether is mobile. * @param bool $is_webp Whether supports webp. */ private function _save_con( $type, $css, $queue_k, $is_mobile, $is_webp ) { // Add filters $css = apply_filters('litespeed_' . $type, $css, $queue_k); // Sanitize: CSS must not contain HTML tags $css = wp_strip_all_tags( $css ); self::debug2('con: ', $css); if ( '/*' === substr( $css, 0, 2 ) && '*/' === substr( $css, -2 ) ) { self::debug('❌ empty ' . $type . ' [content] ' . $css); // continue; // Save the error info too } // Write to file $filecon_md5 = md5($css); $filepath_prefix = $this->_build_filepath_prefix($type); $static_file = LITESPEED_STATIC_DIR . $filepath_prefix . $filecon_md5 . '.css'; File::save($static_file, $css, true); $url_tag = $this->_queue[$queue_k]['url_tag']; $vary = $this->_queue[$queue_k]['vary']; self::debug2("Save URL to file [file] $static_file [vary] $vary"); $this->cls('Data')->save_url($url_tag, $vary, $type, $filecon_md5, dirname($static_file), $is_mobile, $is_webp); Purge::add(strtoupper($type) . '.' . md5($queue_k)); } /** * Prepare CSS from HTML for CCSS generation only. UCSS will used combined CSS directly. * Prepare refined HTML for both CCSS and UCSS. * * @since 3.4.3 * * @param string $html The HTML content. * @param bool $is_webp Whether supports webp. * @param bool $dryrun Whether to run in dry mode. * @return array Array of CSS and HTML. */ public function prepare_css( $html, $is_webp = false, $dryrun = false ) { $css = ''; preg_match_all('#<link ([^>]+)/?>|<style([^>]*)>([^<]+)</style>#isU', $html, $matches, PREG_SET_ORDER); foreach ($matches as $match) { $debug_info = ''; if (strpos($match[0], '<link') === 0) { $attrs = Utility::parse_attr($match[1]); if (empty($attrs['rel'])) { continue; } if ( 'stylesheet' !== $attrs['rel'] ) { if ( 'preload' !== $attrs['rel'] || empty( $attrs['as'] ) || 'style' !== $attrs['as'] ) { continue; } } if (!empty($attrs['media']) && strpos($attrs['media'], 'print') !== false) { continue; } if (empty($attrs['href'])) { continue; } // Check Google fonts hit if (strpos($attrs['href'], 'fonts.googleapis.com') !== false) { $html = str_replace($match[0], '', $html); continue; } $debug_info = $attrs['href']; // Load CSS content if (!$dryrun) { // Dryrun will not load CSS but just drop them $con = $this->cls('Optimizer')->load_file($attrs['href']); if (!$con) { continue; } } else { $con = ''; } } else { // Inline style $attrs = Utility::parse_attr($match[2]); if (!empty($attrs['media']) && strpos($attrs['media'], 'print') !== false) { continue; } Debug2::debug2('[CSS] Load inline CSS ' . substr($match[3], 0, 100) . '...', $attrs); $con = $match[3]; $debug_info = '__INLINE__'; } $con = Optimizer::minify_css($con); if ($is_webp && $this->cls('Media')->webp_support()) { $con = $this->cls('Media')->replace_background_webp($con); } if ( ! empty( $attrs['media'] ) && 'all' !== $attrs['media'] ) { $con = '@media ' . $attrs['media'] . '{' . $con . "}\n"; } else { $con = $con . "\n"; } $con = '/* ' . $debug_info . ' */' . $con; $css .= $con; $html = str_replace($match[0], '', $html); } return [ $css, $html ]; } /** * Filter the comment content, add quotes to selector from whitelist. Return the json * * @since 3.3 */ private function _filter_whitelist() { $whitelist = []; $list = apply_filters('litespeed_ucss_whitelist', $this->conf(self::O_OPTM_UCSS_SELECTOR_WHITELIST)); foreach ($list as $k => $v) { if (substr($v, 0, 2) === '//') { continue; } $whitelist[] = $v; } return $whitelist; } /** * Notify finished from server * * @since 5.1 */ public function notify() { $post_data = \json_decode( file_get_contents( 'php://input' ), true ); if ( is_null( $post_data ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing -- This is a callback from QUIC.cloud, verified by extract_msg() $post_data = $_POST; } self::debug('notify() data', $post_data); $this->_queue = $this->load_queue('ucss'); list($post_data) = $this->cls('Cloud')->extract_msg($post_data, 'ucss'); $notified_data = $post_data['data']; if (empty($notified_data) || !is_array($notified_data)) { self::debug('❌ notify exit: no notified data'); return Cloud::err('no notified data'); } // Check if its in queue or not $valid_i = 0; foreach ($notified_data as $v) { if (empty($v['request_url'])) { self::debug('❌ notify bypass: no request_url', $v); continue; } if (empty($v['queue_k'])) { self::debug('❌ notify bypass: no queue_k', $v); continue; } if (empty($this->_queue[$v['queue_k']])) { self::debug('❌ notify bypass: no this queue [q_k]' . $v['queue_k']); continue; } // Save data if (!empty($v['data_ucss'])) { $is_mobile = $this->_queue[$v['queue_k']]['is_mobile']; $is_webp = $this->_queue[$v['queue_k']]['is_webp']; $this->_save_con('ucss', $v['data_ucss'], $v['queue_k'], $is_mobile, $is_webp); ++$valid_i; } unset($this->_queue[$v['queue_k']]); self::debug('notify data handled, unset queue [q_k] ' . $v['queue_k']); } $this->save_queue('ucss', $this->_queue); self::debug('notified'); return Cloud::ok( [ 'count' => $valid_i ] ); } /** * Handle all request actions from main cls * * @since 2.3 * @access public */ public function handler() { $type = Router::verify_type(); switch ($type) { case self::TYPE_GEN: self::cron(true); break; case self::TYPE_CLEAR_Q: $this->clear_q('ucss'); break; default: break; } Admin::redirect(); } }
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