_summary = self::get_summary(); add_filter( 'litespeed_ucss_whitelist', array( $this->cls( 'Data' ), 'load_ucss_whitelist' ) ); } /** * Build the static filepath * * @since 4.3 Elevated to root.cls * @since 4.3 Have to keep till v4.5 for compatibility when upgrade from v4.2 to v4.3 */ protected function _build_filepath_prefix( $type ) { $filepath_prefix = '/' . $type . '/'; if ( is_multisite() ) { $filepath_prefix .= get_current_blog_id() . '/'; } return $filepath_prefix; } /** * Clear all waiting queues * * @since 4.3 Elevated to root.cls * @since 4.3 Have to keep till v4.5 for compatibility when upgrade from v4.2 to v4.3 */ public function clear_q( $type ) { $filepath_prefix = $this->_build_filepath_prefix( $type ); $static_path = LITESPEED_STATIC_DIR . $filepath_prefix . '.litespeed_conf.dat'; if ( file_exists( $static_path ) ) { unlink( $static_path ); } $msg = __( 'Queue cleared successfully.', 'litespeed-cache' ); Admin_Display::succeed( $msg ); } /** * HTML lazyload CSS * @since 4.0 */ public function prepare_html_lazy() { return ''; } /** * Output critical css * * @since 1.3 * @access public */ public function prepare_ccss() { // Get critical css for current page // Note: need to consider mobile $rules = $this->_ccss(); if ( ! $rules ) { return null; } $error_tag = ''; if ( substr( $rules, 0, 2 ) == '/*' && substr( $rules, -2 ) == '*/' ) { $error_tag = ' data-error="failed to generate"'; } // Append default critical css $rules .= $this->conf( self::O_OPTM_CCSS_CON ); return ''; } /** * Generate CCSS url tag * * @since 4.0 */ private function _gen_ccss_file_tag( $request_url ) { if ( is_404() ) { return '404'; } if ( $this->conf( self::O_OPTM_CCSS_PER_URL ) ) { return $request_url; } $sep_uri = $this->conf( self::O_OPTM_CCSS_SEP_URI ); if ( $sep_uri && $hit = Utility::str_hit_array( $request_url, $sep_uri ) ) { Debug2::debug( '[CCSS] Separate CCSS due to separate URI setting: ' . $hit ); return $request_url; } $pt = Utility::page_type(); $sep_pt = $this->conf( self::O_OPTM_CCSS_SEP_POSTTYPE ); if ( in_array( $pt, $sep_pt ) ) { Debug2::debug( '[CCSS] Separate CCSS due to posttype setting: ' . $pt ); return $request_url; } // Per posttype return $pt; } /** * The critical css content of the current page * * @since 2.3 */ private function _ccss() { global $wp; $request_url = home_url( $wp->request ); $filepath_prefix = $this->_build_filepath_prefix( 'ccss' ); $url_tag = $this->_gen_ccss_file_tag( $request_url ); $vary = $this->cls( 'Vary' )->finalize_full_varies(); $filename = $this->cls( 'Data' )->load_url_file( $url_tag, $vary, 'ccss' ); if ( $filename ) { $static_file = LITESPEED_STATIC_DIR . $filepath_prefix . $filename . '.css'; if ( file_exists( $static_file ) ) { Debug2::debug2( '[CSS] existing ccss ' . $static_file ); return File::read( $static_file ); } } $uid = get_current_user_id(); $ua = ! empty( $_SERVER[ 'HTTP_USER_AGENT' ] ) ? $_SERVER[ 'HTTP_USER_AGENT' ] : ''; // Store it to prepare for cron $this->_queue = $this->load_queue( 'ccss' ); if ( count( $this->_queue ) > 500 ) { Debug2::debug( '[CSS] CCSS Queue is full - 500' ); return null; } $queue_k = ( strlen( $vary ) > 32 ? md5( $vary ) : $vary ) . ' ' . $url_tag; $this->_queue[ $queue_k ] = array( 'url' => $request_url, 'user_agent' => substr( $ua, 0, 200 ), 'is_mobile' => $this->_separate_mobile_ccss(), '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( 'ccss', $this->_queue ); Debug2::debug( '[CSS] Added queue_ccss [url_tag] ' . $url_tag . ' [UA] ' . $ua . ' [vary] ' . $vary . ' [uid] ' . $uid ); // Prepare cache tag for later purge Tag::add( 'CCSS.' . md5( $queue_k ) ); // For v4.1- clean up if ( isset( $this->_summary[ 'ccss_type_history' ] ) || isset( $this->_summary[ 'ccss_history' ] ) || isset( $this->_summary[ 'queue_ccss' ] ) ) { if ( isset( $this->_summary[ 'ccss_type_history' ] ) ) { unset( $this->_summary[ 'ccss_type_history' ] ); } if ( isset( $this->_summary[ 'ccss_history' ] ) ) { unset( $this->_summary[ 'ccss_history' ] ); } if ( isset( $this->_summary[ 'queue_ccss' ] ) ) { unset( $this->_summary[ 'queue_ccss' ] ); } self::save_summary(); } return null; } /** * Get UCSS path * * @since 4.0 */ public function load_ucss( $request_url, $dry_run = false ) { // Check UCSS URI excludes $ucss_exc = apply_filters( 'litespeed_ucss_exc', $this->conf( self::O_OPTM_UCSS_EXC ) ); if ( $ucss_exc && $hit = Utility::str_hit_array( $request_url, $ucss_exc ) ) { Debug2::debug( '[CSS] UCSS bypassed due to UCSS URI Exclude setting: ' . $hit ); return false; } $filepath_prefix = $this->_build_filepath_prefix( 'ucss' ); $url_tag = is_404() ? '404' : $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 ) ) { Debug2::debug2( '[UCSS] existing ucss ' . $static_file ); // Check if is error comment inside only $tmp = File::read( $static_file ); if ( substr( $tmp, 0, 2 ) == '/*' && substr( $tmp, -2 ) == '*/' ) { Debug2::debug2( '[UCSS] existing ucss is error only: ' . $tmp ); return false; } return $filename . '.css'; } } if ( $dry_run ) { return false; } $uid = get_current_user_id(); $ua = ! empty( $_SERVER[ 'HTTP_USER_AGENT' ] ) ? $_SERVER[ 'HTTP_USER_AGENT' ] : ''; // Store it for cron $this->_queue = $this->load_queue( 'ucss' ); if ( count( $this->_queue ) > 500 ) { Debug2::debug( '[CSS] UCSS Queue is full - 500' ); return false; } $queue_k = ( strlen( $vary ) > 32 ? md5( $vary ) : $vary ) . ' ' . $url_tag; $this->_queue[ $queue_k ] = array( 'url' => $request_url, 'user_agent' => substr( $ua, 0, 200 ), 'is_mobile' => $this->_separate_mobile_ccss(), '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 ); Debug2::debug( '[CSS] 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 ) ); // For v4.1- clean up if ( isset( $this->_summary[ 'ucss_history' ] ) || isset( $this->_summary[ 'queue_ucss' ] ) ) { if ( isset( $this->_summary[ 'ucss_history' ] ) ) { unset( $this->_summary[ 'ucss_history' ] ); } if ( isset( $this->_summary[ 'queue_ucss' ] ) ) { unset( $this->_summary[ 'queue_ucss' ] ); } self::save_summary(); } return false; } /** * Check if need to separate ccss for mobile * * @since 2.6.4 * @access private */ private function _separate_mobile_ccss() { return ( wp_is_mobile() || apply_filters( 'litespeed_is_mobile', false ) ) && $this->conf( self::O_CACHE_MOBILE ); } /** * Cron ccss generation * * @since 2.3 * @access private */ public static function cron_ccss( $continue = false ) { $_instance = self::cls(); return $_instance->_cron_handler( 'ccss', $continue ); } /** * Generate UCSS * * @since 4.0 */ public static function cron_ucss( $continue = false ) { $_instance = self::cls(); return $_instance->_cron_handler( 'ucss', $continue ); } /** * Handle UCSS/CCSS cron * * @since 4.2 */ private function _cron_handler( $type, $continue ) { $this->_queue = $this->load_queue( $type ); if ( empty( $this->_queue ) ) { return; } $type_tag = strtoupper( $type ); // For cron, need to check request interval too if ( ! $continue ) { if ( ! empty( $this->_summary[ 'curr_request_' . $type ] ) && time() - $this->_summary[ 'curr_request_' . $type ] < 300 && ! $this->conf( self::O_DEBUG ) ) { Debug2::debug( '[' . $type_tag . '] Last request not done' ); return; } } $i = 0; foreach ( $this->_queue as $k => $v ) { if ( ! empty( $v[ '_status' ] ) ) { continue; } Debug2::debug( '[' . $type_tag . '] cron job [tag] ' . $k . ' [url] ' . $v[ 'url' ] . ( $v[ 'is_mobile' ] ? ' 📱 ' : '' ) . ' [UA] ' . $v[ 'user_agent' ] ); if ( $type == 'ccss' && empty( $v[ 'url_tag' ] ) ) { unset( $this->_queue[ $k ] ); $this->save_queue( $type, $this->_queue ); Debug2::debug( '[CCSS] wrong queue_ccss format' ); continue; } 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' ], $type, $v[ 'is_mobile' ], $v[ 'is_webp' ] ); if ( ! $res ) { // Status is wrong, drop this this->_queue unset( $this->_queue[ $k ] ); $this->save_queue( $type, $this->_queue ); if ( ! $continue ) { return; } if ( $i > 3 ) { $this->_print_loading( count( $this->_queue ), $type_tag ); return Router::self_redirect( Router::ACTION_CSS, $type == 'ccss' ? CSS::TYPE_GEN_CCSS : CSS::TYPE_GEN_UCSS ); } continue; } // Exit queue if out of quota if ( $res == 'out_of_quota' ) { return; } $this->_queue[ $k ][ '_status' ] = 'requested'; $this->save_queue( $type, $this->_queue ); // only request first one if ( ! $continue ) { return; } if ( $i > 3 ) { $this->_print_loading( count( $this->_queue ), $type_tag ); return Router::self_redirect( Router::ACTION_CSS, $type == 'ccss' ? CSS::TYPE_GEN_CCSS : CSS::TYPE_GEN_UCSS ); } } } /** * Send to QC API to generate CCSS/UCSS * * @since 2.3 * @access private */ private function _send_req( $request_url, $queue_k, $uid, $user_agent, $vary, $url_tag, $type, $is_mobile, $is_webp ) { $svc = $type == 'ccss' ? Cloud::SVC_CCSS : Cloud::SVC_UCSS; // Check if has credit to push or not $err = false; $allowance = $this->cls( 'Cloud' )->allowance( $svc, $err ); if ( ! $allowance ) { Debug2::debug( '[CCSS] ❌ 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_' . $type ] = time(); self::save_summary(); // Gather guest HTML to send $html = $this->prepare_html( $request_url, $user_agent, $uid ); if ( ! $html ) { return false; } // Parse HTML to gather all CSS content before requesting $css = false; if ( $type == 'ccss' ) { list( $css, $html ) = $this->prepare_css( $html, $is_webp ); } else { 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'; Debug2::debug( '[UCSS] Checking combined file ' . $static_file ); if ( file_exists( $static_file ) ) { $css = File::read( $static_file ); } } if ( ! $css ) { Debug2::debug( '[UCSS] ❌ No combined css' ); return false; } // Generate critical css $data = array( // 'type' => strtoupper( $type ), // Backward compatibility for v4.1- '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 ( $type == 'ucss' ) { if ( ! isset( $this->_ucss_whitelist ) ) { $this->_ucss_whitelist = $this->_filter_whitelist(); } $data[ 'whitelist' ] = $this->_ucss_whitelist; } Debug2::debug( '[CSS] Generating: ', $data ); $json = Cloud::post( $svc, $data, 30 ); if ( ! is_array( $json ) ) { return false; } // Old version compatibility if ( empty( $json[ 'status' ] ) ) { if ( ! empty( $json[ $type ] ) ) { $this->_save_con( $type, $json[ $type ], $queue_k ); } // Delete the row return false; } // Unknown status, remove this line if ( $json[ 'status' ] != 'queued' ) { return false; } // Save summary data $this->_summary[ 'last_spent_' . $type ] = time() - $this->_summary[ 'curr_request_' . $type ]; $this->_summary[ 'last_request_' . $type ] = $this->_summary[ 'curr_request_' . $type ]; $this->_summary[ 'curr_request_' . $type ] = 0; self::save_summary(); return true; } /** * Save CCSS/UCSS content * * @since 4.2 */ private function _save_con( $type, $css, $queue_k ) { // Add filters $css = apply_filters( 'litespeed_' . $type, $css, $queue_k ); Debug2::debug2( '[CSS] con: ' . $css ); if ( substr( $css, 0, 2 ) == '/*' && substr( $css, -2 ) == '*/' ) { Debug2::debug( '[CSS] ❌ 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' ]; Debug2::debug2( "[CSS] Save URL to file [file] $static_file [vary] $vary" ); $this->cls( 'Data' )->save_url( $url_tag, $vary, $type, $filecon_md5, dirname( $static_file ) ); Purge::add( strtoupper( $type ) . '.' . md5( $queue_k ) ); } /** * Notify CCSS/UCSS * * @since 4.2 */ public function notify( $type ) { $post_data = json_decode( file_get_contents( 'php://input' ), true ); if( is_null( $post_data ) ) { $post_data = $_POST; } if ( empty( $post_data[ 'data' ] ) ) { Debug2::debug( '[CSS] ❌ empty data ' . $type ); return; } if ( empty( $post_data[ 'status' ] ) ) { Debug2::debug( '[CSS] ❌ empty status' ); return; } Debug2::debug( '[CSS] Received notification [Type] ' . $type . ' [Count] ' . count( $post_data[ 'data' ] ) ); $this->_queue = $this->load_queue( $type ); // Clear existing queues $valid_count = 0; if ( $post_data[ 'status' ] == 'clear' ) { foreach ( $post_data[ 'data' ] as $queue_k ) { if ( ! empty( $this->_queue[ $queue_k ] ) ) { unset( $this->_queue[ $queue_k ] ); } } } // Append done list elseif ( $post_data[ 'status' ] == 'done' ) { foreach ( $post_data[ 'data' ] as $queue_k => $css ) { if ( empty( $this->_queue[ $queue_k ] ) ) { continue; } $this->_save_con( $type, $css, $queue_k ); unset( $this->_queue[ $queue_k ] ); $valid_count++; } } $this->save_queue( $type, $this->_queue ); Debug2::debug( '[CSS] Saved result [valid count] ' . $valid_count ); return array( 'count' => $valid_count ); } /** * Print a loading message when redirecting CCSS/UCSS page to aviod whiteboard confusion */ private function _print_loading( $counter, $type ) { echo '

'; echo "

"; echo sprintf( __( '%1$s %2$s files left in queue', 'litespeed-cache' ), $counter, $type ); echo '

' . __( 'Cancel', 'litespeed-cache' ) . '

'; echo '

'; } /** * Play for fun * * @since 3.4.3 */ public function test_url( $request_url ) { $user_agent = $_SERVER[ 'HTTP_USER_AGENT' ]; $html = $this->prepare_html( $request_url, $user_agent ); list( $css, $html ) = $this->prepare_css( $html, true, true ); // var_dump( $css ); // $html = << $request_url, 'ccss_type' => 'test', 'user_agent' => $user_agent, 'is_mobile' => 0, 'html' => $html, 'css' => $css, 'type' => 'CCSS', ); // Debug2::debug( '[CSS] Generating: ', $data ); $json = Cloud::post( Cloud::SVC_CCSS, $data, 180 ); var_dump($json); } /** * Prepare HTML from URL * * @since 3.4.3 */ public function prepare_html( $request_url, $user_agent, $uid = false ) { $html = $this->cls( 'Crawler' )->self_curl( add_query_arg( 'LSCWP_CTRL', 'before_optm', $request_url ), $user_agent, $uid ); Debug2::debug2( '[CSS] self_curl result....', $html ); $html = $this->cls( 'Optimizer' )->html_min( $html, true ); // Drop $html = preg_replace( '##isU', '', $html ); return $html; } /** * 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 */ public function prepare_css( $html, $is_webp = false, $dryrun = false ) { $css = ''; preg_match_all( '#]+)/?>|]*)>([^<]+)#isU', $html, $matches, PREG_SET_ORDER ); foreach ( $matches as $match ) { $debug_info = ''; if ( strpos( $match[ 0 ], '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 ) { $con = $this->cls( 'Media' )->replace_background_webp( $con ); } if ( ! empty( $attrs[ 'media' ] ) && $attrs[ 'media' ] !== 'all' ) { $con = '@media ' . $attrs[ 'media' ] . '{' . $con . "}\n"; } else { $con = $con . "\n"; } $con = '/* ' . $debug_info . ' */' . $con; $css .= $con; $html = str_replace( $match[ 0 ], '', $html ); } return array( $css, $html ); } /** * Filter the comment content, add quotes to selector from whitelist. Return the json * * @since 3.3 */ private function _filter_whitelist() { $whitelist = array(); $list = apply_filters( 'litespeed_ucss_whitelist', $this->conf( self::O_OPTM_UCSS_WHITELIST ) ); foreach ( $list as $k => $v ) { if ( substr( $v, 0, 2 ) === '//' ) { continue; } // Wrap in quotes for selectors if ( substr( $v, 0, 1 ) !== '/' && strpos( $v, '"' ) === false && strpos( $v, "'" ) === false ) { // $v = "'$v'"; } $whitelist[] = $v; } return $whitelist; } /** * 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_UCSS: self::cron_ucss( true ); break; case self::TYPE_GEN_CCSS: self::cron_ccss( true ); break; case self::TYPE_CLEAR_Q_UCSS: $this->clear_q( 'ucss' ); break; case self::TYPE_CLEAR_Q_CCSS: $this->clear_q( 'ccss' ); break; default: break; } Admin::redirect(); } }