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Editing: optimize.cls.php
<?php // phpcs:ignoreFile /** * The optimize class. * * @since 1.2.2 */ namespace LiteSpeed; defined('WPINC') || exit(); class Optimize extends Base { const LOG_TAG = '🎢'; const LIB_FILE_CSS_ASYNC = 'assets/js/css_async.min.js'; const LIB_FILE_WEBFONTLOADER = 'assets/js/webfontloader.min.js'; const LIB_FILE_JS_DELAY = 'assets/js/js_delay.min.js'; const ITEM_TIMESTAMP_PURGE_CSS = 'timestamp_purge_css'; const DUMMY_CSS_REGEX = "#<link [ \w='\"/]*id=['\"]litespeed-cache-dummy-css['\"] href=['\"].+assets/css/litespeed-dummy\.css[?\w.=-]*['\"][ \w='\"/]*>#isU"; private $content; private $content_ori; private $cfg_css_min; private $cfg_css_comb; private $cfg_js_min; private $cfg_js_comb; private $cfg_css_async; private $cfg_js_delay_inc = array(); private $cfg_js_defer; private $cfg_js_defer_exc = false; private $cfg_ggfonts_async; private $_conf_css_font_display; private $cfg_ggfonts_rm; private $dns_prefetch; private $dns_preconnect; private $_ggfonts_urls = array(); private $_ccss; private $_ucss = false; private $__optimizer; private $html_foot = ''; // The html info append to <body> private $html_head = ''; // The html info append to <head> private $html_head_early = ''; // The html info prepend to top of head private static $_var_i = 0; private $_var_preserve_js = array(); private $_request_url; /** * Constructor * * @since 4.0 */ public function __construct() { self::debug('init'); $this->__optimizer = $this->cls('Optimizer'); } /** * Init optimizer * * @since 3.0 * @access protected */ public function init() { $this->cfg_css_async = defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_CSS_ASYNC); if ($this->cfg_css_async) { if (!$this->cls('Cloud')->activated()) { self::debug('❌ CCSS set to OFF due to QC not activated'); $this->cfg_css_async = false; } if ((defined('LITESPEED_GUEST_OPTM') || ($this->conf(self::O_OPTM_UCSS) && $this->conf(self::O_OPTM_CSS_COMB))) && $this->conf(self::O_OPTM_UCSS_INLINE)) { self::debug('⚠️ CCSS set to OFF due to UCSS Inline'); $this->cfg_css_async = false; } } $this->cfg_js_defer = $this->conf(self::O_OPTM_JS_DEFER); if (defined('LITESPEED_GUEST_OPTM')) { $this->cfg_js_defer = 2; } if ($this->cfg_js_defer == 2) { add_filter( 'litespeed_optm_cssjs', function ( $con, $file_type ) { if ($file_type == 'js') { $con = str_replace('DOMContentLoaded', 'DOMContentLiteSpeedLoaded', $con); // $con = str_replace( 'addEventListener("load"', 'addEventListener("litespeedLoad"', $con ); } return $con; }, 20, 2 ); } // To remove emoji from WP if ($this->conf(self::O_OPTM_EMOJI_RM)) { $this->_emoji_rm(); } if ($this->conf(self::O_OPTM_QS_RM)) { add_filter('style_loader_src', array( $this, 'remove_query_strings' ), 999); add_filter('script_loader_src', array( $this, 'remove_query_strings' ), 999); } // GM JS exclude @since 4.1 if (defined('LITESPEED_GUEST_OPTM')) { $this->cfg_js_defer_exc = apply_filters('litespeed_optm_gm_js_exc', $this->conf(self::O_OPTM_GM_JS_EXC)); } else { /** * Exclude js from deferred setting * * @since 1.5 */ if ($this->cfg_js_defer) { add_filter('litespeed_optm_js_defer_exc', array( $this->cls('Data'), 'load_js_defer_exc' )); $this->cfg_js_defer_exc = apply_filters('litespeed_optm_js_defer_exc', $this->conf(self::O_OPTM_JS_DEFER_EXC)); $this->cfg_js_delay_inc = apply_filters('litespeed_optm_js_delay_inc', $this->conf(self::O_OPTM_JS_DELAY_INC)); } } // Add vary filter for Role Excludes @since 1.6 add_filter('litespeed_vary', array( $this, 'vary_add_role_exclude' )); // DNS optm (Prefetch/Preconnect) @since 7.3 $this->_dns_optm_init(); add_filter('litespeed_buffer_finalize', array( $this, 'finalize' ), 20); // Inject a dummy CSS file to control final optimized data location in <head> wp_enqueue_style(Core::PLUGIN_NAME . '-dummy', LSWCP_PLUGIN_URL . 'assets/css/litespeed-dummy.css'); } /** * Exclude role from optimization filter * * @since 1.6 * @access public */ public function vary_add_role_exclude( $vary ) { if ($this->cls('Conf')->in_optm_exc_roles()) { $vary['role_exclude_optm'] = 1; } return $vary; } /** * Remove emoji from WP * * @since 1.4 * @since 2.9.8 Changed to private * @access private */ private function _emoji_rm() { remove_action('wp_head', 'print_emoji_detection_script', 7); remove_action('admin_print_scripts', 'print_emoji_detection_script'); remove_filter('the_content_feed', 'wp_staticize_emoji'); remove_filter('comment_text_rss', 'wp_staticize_emoji'); /** * Added for better result * * @since 1.6.2.1 */ remove_action('wp_print_styles', 'print_emoji_styles'); remove_action('admin_print_styles', 'print_emoji_styles'); remove_filter('wp_mail', 'wp_staticize_emoji_for_email'); } /** * Delete file-based cache folder * * @since 2.1 * @access public */ public function rm_cache_folder( $subsite_id = false ) { if ($subsite_id) { file_exists(LITESPEED_STATIC_DIR . '/css/' . $subsite_id) && File::rrmdir(LITESPEED_STATIC_DIR . '/css/' . $subsite_id); file_exists(LITESPEED_STATIC_DIR . '/js/' . $subsite_id) && File::rrmdir(LITESPEED_STATIC_DIR . '/js/' . $subsite_id); return; } file_exists(LITESPEED_STATIC_DIR . '/css') && File::rrmdir(LITESPEED_STATIC_DIR . '/css'); file_exists(LITESPEED_STATIC_DIR . '/js') && File::rrmdir(LITESPEED_STATIC_DIR . '/js'); } /** * Remove QS * * @since 1.3 * @access public */ public function remove_query_strings( $src ) { if (strpos($src, '_litespeed_rm_qs=0') || strpos($src, '/recaptcha')) { return $src; } if (!Utility::is_internal_file($src)) { return $src; } if (strpos($src, '.js?') !== false || strpos($src, '.css?') !== false) { $src = preg_replace('/\?.*/', '', $src); } return $src; } /** * Run optimize process * NOTE: As this is after cache finalized, can NOT set any cache control anymore * * @since 1.2.2 * @access public * @return string The content that is after optimization */ public function finalize( $content ) { $content = $this->_finalize($content); // Fallback to replace dummy css placeholder if (false !== preg_match(self::DUMMY_CSS_REGEX, $content)) { self::debug('Fallback to drop dummy CSS'); $content = preg_replace( self::DUMMY_CSS_REGEX, '', $content ); } return $content; } private function _finalize( $content ) { if (defined('LITESPEED_NO_PAGEOPTM')) { self::debug2('bypass: NO_PAGEOPTM const'); return $content; } if (!defined('LITESPEED_IS_HTML')) { self::debug('bypass: Not frontend HTML type'); return $content; } if (!defined('LITESPEED_GUEST_OPTM')) { if (!Control::is_cacheable()) { self::debug('bypass: Not cacheable'); return $content; } // Check if hit URI excludes add_filter('litespeed_optm_uri_exc', array( $this->cls('Data'), 'load_optm_uri_exc' )); $excludes = apply_filters('litespeed_optm_uri_exc', $this->conf(self::O_OPTM_EXC)); $result = Utility::str_hit_array($_SERVER['REQUEST_URI'], $excludes); if ($result) { self::debug('bypass: hit URI Excludes setting: ' . $result); return $content; } } self::debug('start'); $this->content_ori = $this->content = $content; $this->_optimize(); return $this->content; } /** * Optimize css src * * @since 1.2.2 * @access private */ private function _optimize() { global $wp; // get current request url $permalink_structure = get_option( 'permalink_structure' ); if ( ! empty( $permalink_structure ) ) { $this->_request_url = trailingslashit( home_url( $wp->request ) ); } else { $qs_add = $wp->query_string ? '?' . (string) $wp->query_string : '' ; $this->_request_url = home_url( $wp->request ) . $qs_add; } $this->cfg_css_min = defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_CSS_MIN); $this->cfg_css_comb = defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_CSS_COMB); $this->cfg_js_min = defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_JS_MIN); $this->cfg_js_comb = defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_JS_COMB); $this->cfg_ggfonts_rm = defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_GGFONTS_RM); $this->cfg_ggfonts_async = !defined('LITESPEED_GUEST_OPTM') && $this->conf(self::O_OPTM_GGFONTS_ASYNC); // forced rm already $this->_conf_css_font_display = !defined('LITESPEED_GUEST_OPTM') && $this->conf(self::O_OPTM_CSS_FONT_DISPLAY); if (!$this->cls('Router')->can_optm()) { self::debug('bypass: admin/feed/preview'); return; } if ($this->cfg_css_async) { $this->_ccss = $this->cls('CSS')->prepare_ccss(); if (!$this->_ccss) { self::debug('❌ CCSS set to OFF due to CCSS not generated yet'); $this->cfg_css_async = false; } elseif (strpos($this->_ccss, '<style id="litespeed-ccss" data-error') === 0) { self::debug('❌ CCSS set to OFF due to CCSS failed to generate'); $this->cfg_css_async = false; } } do_action('litespeed_optm'); // Parse css from content $src_list = false; if ($this->cfg_css_min || $this->cfg_css_comb || $this->cfg_ggfonts_rm || $this->cfg_css_async || $this->cfg_ggfonts_async || $this->_conf_css_font_display) { add_filter('litespeed_optimize_css_excludes', array( $this->cls('Data'), 'load_css_exc' )); list($src_list, $html_list) = $this->_parse_css(); } // css optimizer if ($this->cfg_css_min || $this->cfg_css_comb) { if ($src_list) { // IF combine if ($this->cfg_css_comb) { // Check if has inline UCSS enabled or not if ((defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_UCSS)) && $this->conf(self::O_OPTM_UCSS_INLINE)) { $filename = $this->cls('UCSS')->load($this->_request_url, true); if ($filename) { $filepath_prefix = $this->_build_filepath_prefix('ucss'); $this->_ucss = File::read(LITESPEED_STATIC_DIR . $filepath_prefix . $filename); // Drop all css $this->content = str_replace($html_list, '', $this->content); } } if (!$this->_ucss) { $url = $this->_build_hash_url($src_list); if ($url) { // Handle css async load if ($this->cfg_css_async) { $this->html_head .= '<link rel="preload" data-asynced="1" data-optimized="2" as="style" onload="this.onload=null;this.rel=\'stylesheet\'" href="' . Str::trim_quotes($url) . '" />'; // todo: How to use " in attr wrapper " } else { $this->html_head .= '<link data-optimized="2" rel="stylesheet" href="' . Str::trim_quotes($url) . '" />'; // use 2 as combined } // Move all css to top $this->content = str_replace($html_list, '', $this->content); } } } // Only minify elseif ($this->cfg_css_min) { // will handle async css load inside $this->_src_queue_handler($src_list, $html_list); } // Only HTTP2 push else { foreach ($src_list as $src_info) { if (!empty($src_info['inl'])) { continue; } } } } } // Handle css lazy load if not handled async loaded yet if ($this->cfg_css_async && !$this->cfg_css_min && !$this->cfg_css_comb) { // async html $html_list_async = $this->_async_css_list($html_list, $src_list); // Replace async css $this->content = str_replace($html_list, $html_list_async, $this->content); } // Parse js from buffer as needed $src_list = false; if ($this->cfg_js_min || $this->cfg_js_comb || $this->cfg_js_defer || $this->cfg_js_delay_inc) { add_filter('litespeed_optimize_js_excludes', array( $this->cls('Data'), 'load_js_exc' )); list($src_list, $html_list) = $this->_parse_js(); } // js optimizer if ($src_list) { // IF combine if ($this->cfg_js_comb) { $url = $this->_build_hash_url($src_list, 'js'); if ($url) { $this->html_foot .= $this->_build_js_tag($url); // Will move all JS to bottom combined one $this->content = str_replace($html_list, '', $this->content); } } // Only minify elseif ($this->cfg_js_min) { // Will handle js defer inside $this->_src_queue_handler($src_list, $html_list, 'js'); } // Only HTTP2 push and Defer else { foreach ($src_list as $k => $src_info) { // Inline JS if (!empty($src_info['inl'])) { if ($this->cfg_js_defer) { $attrs = !empty($src_info['attrs']) ? $src_info['attrs'] : ''; $deferred = $this->_js_inline_defer($src_info['src'], $attrs); if ($deferred) { $this->content = str_replace($html_list[$k], $deferred, $this->content); } } } // JS files elseif ($this->cfg_js_defer) { $deferred = $this->_js_defer($html_list[$k], $src_info['src']); if ($deferred) { $this->content = str_replace($html_list[$k], $deferred, $this->content); } } elseif ($this->cfg_js_delay_inc) { $deferred = $this->_js_delay($html_list[$k], $src_info['src']); if ($deferred) { $this->content = str_replace($html_list[$k], $deferred, $this->content); } } } } } // Append JS inline var for preserved ESI // Shouldn't give any optm (defer/delay) @since 4.4 if ($this->_var_preserve_js) { $this->html_head .= '<script>var ' . implode(',', $this->_var_preserve_js) . ';</script>'; self::debug2('Inline JS defer vars', $this->_var_preserve_js); } // Append async compatibility lib to head if ($this->cfg_css_async) { // Inline css async lib if ($this->conf(self::O_OPTM_CSS_ASYNC_INLINE)) { $this->html_head .= $this->_build_js_inline(File::read(LSCWP_DIR . self::LIB_FILE_CSS_ASYNC), true); } else { $css_async_lib_url = LSWCP_PLUGIN_URL . self::LIB_FILE_CSS_ASYNC; $this->html_head .= $this->_build_js_tag($css_async_lib_url); // Don't exclude it from defer for now } } /** * Handle google fonts async * This will result in a JS snippet in head, so need to put it in the end to avoid being replaced by JS parser */ $this->_async_ggfonts(); /** * Font display optm * * @since 3.0 */ $this->_font_optm(); // Inject JS Delay lib $this->_maybe_js_delay(); /** * HTML Lazyload */ if ($this->conf(self::O_OPTM_HTML_LAZY)) { $this->html_head = $this->cls('CSS')->prepare_html_lazy() . $this->html_head; } // Maybe prepend inline UCSS if ($this->_ucss) { $this->html_head = '<style id="litespeed-ucss">' . $this->_ucss . '</style>' . $this->html_head; } // Check if there is any critical css rules setting if ($this->cfg_css_async && $this->_ccss) { $this->html_head = $this->_ccss . $this->html_head; } // Replace html head part $this->html_head_early = apply_filters('litespeed_optm_html_head_early', $this->html_head_early); if ($this->html_head_early) { // Put header content to be after charset if (false !== strpos($this->content, '<meta charset')) { self::debug('Put early optm data to be after <meta charset>'); $this->content = preg_replace('#<meta charset([^>]*)>#isU', '<meta charset$1>' . $this->html_head_early, $this->content, 1); } else { self::debug('Put early optm data to be right after <head>'); $this->content = preg_replace('#<head([^>]*)>#isU', '<head$1>' . $this->html_head_early, $this->content, 1); } } $this->html_head = apply_filters('litespeed_optm_html_head', $this->html_head); if ($this->html_head) { if (apply_filters('litespeed_optm_html_after_head', false)) { $this->content = str_replace('</head>', $this->html_head . '</head>', $this->content); } else { // Put header content to dummy css position if (false !== preg_match(self::DUMMY_CSS_REGEX, $this->content)) { self::debug('Put optm data to dummy css location'); $this->content = preg_replace( self::DUMMY_CSS_REGEX, $this->html_head, $this->content ); } // Fallback: try to be after charset elseif (strpos($this->content, '<meta charset') !== false) { self::debug('Put optm data to be after <meta charset>'); $this->content = preg_replace('#<meta charset([^>]*)>#isU', '<meta charset$1>' . $this->html_head, $this->content, 1); } else { self::debug('Put optm data to be after <head>'); $this->content = preg_replace('#<head([^>]*)>#isU', '<head$1>' . $this->html_head, $this->content, 1); } } } // Replace html foot part $this->html_foot = apply_filters('litespeed_optm_html_foot', $this->html_foot); if ($this->html_foot) { $this->content = str_replace('</body>', $this->html_foot . '</body>', $this->content); } // Drop noscript if enabled if ($this->conf(self::O_OPTM_NOSCRIPT_RM)) { // $this->content = preg_replace( '#<noscript>.*</noscript>#isU', '', $this->content ); } // Inline font-face optimize $this->content = $this->__optimizer->optm_font_face( $this->content ); // HTML minify if (defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_HTML_MIN)) { $this->content = $this->__optimizer->html_min($this->content); } } /** * Build a full JS tag * * @since 4.0 */ private function _build_js_tag( $src ) { if ($this->cfg_js_defer === 2 || Utility::str_hit_array($src, $this->cfg_js_delay_inc)) { return '<script data-optimized="1" type="litespeed/javascript" data-src="' . Str::trim_quotes($src) . '"></script>'; } if ($this->cfg_js_defer) { return '<script data-optimized="1" src="' . Str::trim_quotes($src) . '" defer></script>'; } return '<script data-optimized="1" src="' . Str::trim_quotes($src) . '"></script>'; } /** * Build a full inline JS snippet * * @since 4.0 */ private function _build_js_inline( $script, $minified = false ) { if ($this->cfg_js_defer) { $deferred = $this->_js_inline_defer($script, false, $minified); if ($deferred) { return $deferred; } } return '<script>' . $script . '</script>'; } /** * Load JS delay lib * * @since 4.0 */ private function _maybe_js_delay() { if ($this->cfg_js_defer !== 2 && !$this->cfg_js_delay_inc) { return; } if (!defined('LITESPEED_JS_DELAY_LIB_LOADED')) { define('LITESPEED_JS_DELAY_LIB_LOADED', true); $this->html_foot .= '<script>' . File::read(LSCWP_DIR . self::LIB_FILE_JS_DELAY) . '</script>'; } } /** * Google font async * * @since 2.7.3 * @access private */ private function _async_ggfonts() { if (!$this->cfg_ggfonts_async || !$this->_ggfonts_urls) { return; } self::debug2('google fonts async found: ', $this->_ggfonts_urls); $this->html_head_early .= '<link rel="preconnect" href="https://fonts.gstatic.com/" crossorigin />'; /** * Append fonts * * Could be multiple fonts * * <link rel='stylesheet' href='//fonts.googleapis.com/css?family=Open+Sans%3A400%2C600%2C700%2C800%2C300&ver=4.9.8' type='text/css' media='all' /> * <link rel='stylesheet' href='//fonts.googleapis.com/css?family=PT+Sans%3A400%2C700%7CPT+Sans+Narrow%3A400%7CMontserrat%3A600&subset=latin&ver=4.9.8' type='text/css' media='all' /> * -> family: PT Sans:400,700|PT Sans Narrow:400|Montserrat:600 * <link rel='stylesheet' href='https://fonts.googleapis.com/css?family=Source+Sans+Pro:400,300,300italic,400italic,600,700,900&subset=latin%2Clatin-ext' /> */ $script = 'WebFontConfig={google:{families:['; $families = array(); foreach ($this->_ggfonts_urls as $v) { $qs = wp_specialchars_decode($v); $qs = urldecode($qs); $qs = parse_url($qs, PHP_URL_QUERY); parse_str($qs, $qs); if (empty($qs['family'])) { self::debug('ERR ggfonts failed to find family: ' . $v); continue; } $subset = empty($qs['subset']) ? '' : ':' . $qs['subset']; foreach (array_filter(explode('|', $qs['family'])) as $v2) { $families[] = Str::trim_quotes($v2 . $subset); } } $script .= '"' . implode('","', $families) . ($this->_conf_css_font_display ? '&display=swap' : '') . '"'; $script .= ']}};'; // if webfontloader lib was loaded before WebFontConfig variable, call WebFont.load $script .= 'if ( typeof WebFont === "object" && typeof WebFont.load === "function" ) { WebFont.load( WebFontConfig ); }'; $html = $this->_build_js_inline($script); // https://cdnjs.cloudflare.com/ajax/libs/webfont/1.6.28/webfontloader.js $webfont_lib_url = LSWCP_PLUGIN_URL . self::LIB_FILE_WEBFONTLOADER; // default async, if js defer set use defer $html .= $this->_build_js_tag($webfont_lib_url); // Put this in the very beginning for preconnect $this->html_head = $html . $this->html_head; } /** * Font optm * * @since 3.0 * @access private */ private function _font_optm() { if (!$this->_conf_css_font_display || !$this->_ggfonts_urls) { return; } self::debug2('google fonts optm ', $this->_ggfonts_urls); foreach ($this->_ggfonts_urls as $v) { if (strpos($v, 'display=')) { continue; } $this->html_head = str_replace($v, $v . '&display=swap', $this->html_head); $this->html_foot = str_replace($v, $v . '&display=swap', $this->html_foot); $this->content = str_replace($v, $v . '&display=swap', $this->content); } } /** * Prefetch DNS * * @since 1.7.1 DNS prefetch * @since 5.6.1 DNS preconnect * @access private */ private function _dns_optm_init() { // Widely enable link DNS prefetch if (defined('LITESPEED_GUEST_OPTM') || $this->conf(self::O_OPTM_DNS_PREFETCH_CTRL)) { @header('X-DNS-Prefetch-Control: on'); } $this->dns_prefetch = $this->conf(self::O_OPTM_DNS_PREFETCH); $this->dns_preconnect = $this->conf(self::O_OPTM_DNS_PRECONNECT); if (!$this->dns_prefetch && !$this->dns_preconnect) { return; } if (function_exists('wp_resource_hints')) { add_filter('wp_resource_hints', array( $this, 'dns_optm_filter' ), 10, 2); } else { add_action('litespeed_optm', array( $this, 'dns_optm_output' )); } } /** * DNS optm hook for WP * * @since 1.7.1 * @access public */ public function dns_optm_filter( $urls, $relation_type ) { if ('dns-prefetch' === $relation_type) { foreach ($this->dns_prefetch as $v) { if ($v) { $urls[] = $v; } } } if ('preconnect' === $relation_type) { foreach ($this->dns_preconnect as $v) { if ($v) { $urls[] = $v; } } } return $urls; } /** * DNS optm output directly * * @since 1.7.1 DNS prefetch * @since 5.6.1 DNS preconnect * @access public */ public function dns_optm_output() { foreach ($this->dns_prefetch as $v) { if ($v) { $this->html_head_early .= '<link rel="dns-prefetch" href="' . Str::trim_quotes($v) . '" />'; } } foreach ($this->dns_preconnect as $v) { if ($v) { $this->html_head_early .= '<link rel="preconnect" href="' . Str::trim_quotes($v) . '" crossorigin />'; } } } /** * Run minify with src queue list * * @since 1.2.2 * @access private */ private function _src_queue_handler( $src_list, $html_list, $file_type = 'css' ) { $html_list_ori = $html_list; $can_webp = $this->cls('Media')->webp_support(); $tag = $file_type == 'css' ? 'link' : 'script'; foreach ($src_list as $key => $src_info) { // Minify inline CSS/JS if (!empty($src_info['inl'])) { if ($file_type == 'css') { $code = Optimizer::minify_css($src_info['src']); $can_webp && ($code = $this->cls('Media')->replace_background_webp($code)); $snippet = str_replace($src_info['src'], $code, $html_list[$key]); } else { // Inline defer JS if ($this->cfg_js_defer) { $attrs = !empty($src_info['attrs']) ? $src_info['attrs'] : ''; $snippet = $this->_js_inline_defer($src_info['src'], $attrs) ?: $html_list[$key]; } else { $code = Optimizer::minify_js($src_info['src']); $snippet = str_replace($src_info['src'], $code, $html_list[$key]); } } } // CSS/JS files else { $url = $this->_build_single_hash_url($src_info['src'], $file_type); if ($url) { $snippet = str_replace($src_info['src'], $url, $html_list[$key]); } // Handle css async load if ($file_type == 'css' && $this->cfg_css_async) { $snippet = $this->_async_css($snippet); } // Handle js defer if ($file_type === 'js' && $this->cfg_js_defer) { $snippet = $this->_js_defer($snippet, $src_info['src']) ?: $snippet; } } $snippet = str_replace("<$tag ", '<' . $tag . ' data-optimized="1" ', $snippet); $html_list[$key] = $snippet; } $this->content = str_replace($html_list_ori, $html_list, $this->content); } /** * Build a single URL mapped filename (This will not save in DB) * * @since 4.0 */ private function _build_single_hash_url( $src, $file_type = 'css' ) { $content = $this->__optimizer->load_file($src, $file_type); $is_min = $this->__optimizer->is_min($src); $content = $this->__optimizer->optm_snippet($content, $file_type, !$is_min, $src); $filepath_prefix = $this->_build_filepath_prefix($file_type); // Save to file $filename = $filepath_prefix . md5($this->remove_query_strings($src)) . '.' . $file_type; $static_file = LITESPEED_STATIC_DIR . $filename; File::save($static_file, $content, true); // QS is required as $src may contains version info $qs_hash = substr(md5($src), -5); return LITESPEED_STATIC_URL . "$filename?ver=$qs_hash"; } /** * Generate full URL path with hash for a list of src * * @since 1.2.2 * @access private */ private function _build_hash_url( $src_list, $file_type = 'css' ) { // $url_sensitive = $this->conf( self::O_OPTM_CSS_UNIQUE ) && $file_type == 'css'; // If need to keep unique CSS per URI // Replace preserved ESI (before generating hash) if ($file_type == 'js') { foreach ($src_list as $k => $v) { if (empty($v['inl'])) { continue; } $src_list[$k]['src'] = $this->_preserve_esi($v['src']); } } $minify = $file_type === 'css' ? $this->cfg_css_min : $this->cfg_js_min; $filename_info = $this->__optimizer->serve($this->_request_url, $file_type, $minify, $src_list); if (!$filename_info) { return false; // Failed to generate } list($filename, $type) = $filename_info; // Add cache tag in case later file deleted to avoid lscache served stale non-existed files @since 4.4.1 Tag::add(Tag::TYPE_MIN . '.' . $filename); $qs_hash = substr(md5(self::get_option(self::ITEM_TIMESTAMP_PURGE_CSS)), -5); // As filename is already related to filecon md5, no need QS anymore $filepath_prefix = $this->_build_filepath_prefix($type); return LITESPEED_STATIC_URL . $filepath_prefix . $filename . '?ver=' . $qs_hash; } /** * Parse js src * * @since 1.2.2 * @access private */ private function _parse_js() { $excludes = apply_filters('litespeed_optimize_js_excludes', $this->conf(self::O_OPTM_JS_EXC)); $combine_ext_inl = $this->conf(self::O_OPTM_JS_COMB_EXT_INL); if (!apply_filters('litespeed_optm_js_comb_ext_inl', true)) { self::debug2('js_comb_ext_inl bypassed via litespeed_optm_js_comb_ext_inl filter'); $combine_ext_inl = false; } $src_list = array(); $html_list = array(); // V7 added: (?:\r\n?|\n?) to fix replacement leaving empty new line $content = preg_replace('#<!--.*-->(?:\r\n?|\n?)#sU', '', $this->content); preg_match_all('#<script([^>]*)>(.*)</script>(?:\r\n?|\n?)#isU', $content, $matches, PREG_SET_ORDER); foreach ($matches as $match) { $attrs = empty($match[1]) ? array() : Utility::parse_attr($match[1]); if (isset($attrs['data-optimized'])) { continue; } if (!empty($attrs['data-no-optimize'])) { continue; } if (!empty($attrs['data-cfasync']) && $attrs['data-cfasync'] === 'false') { continue; } if (!empty($attrs['type']) && $attrs['type'] != 'text/javascript') { continue; } // to avoid multiple replacement if (in_array($match[0], $html_list)) { continue; } $this_src_arr = array(); // JS files if (!empty($attrs['src'])) { // Exclude check $js_excluded = Utility::str_hit_array($attrs['src'], $excludes); $is_internal = Utility::is_internal_file($attrs['src']); $is_file = substr($attrs['src'], 0, 5) != 'data:'; $ext_excluded = !$combine_ext_inl && !$is_internal; if ($js_excluded || $ext_excluded || !$is_file) { // Maybe defer if ($this->cfg_js_defer) { $deferred = $this->_js_defer($match[0], $attrs['src']); if ($deferred) { $this->content = str_replace($match[0], $deferred, $this->content); } } self::debug2('_parse_js bypassed due to ' . ($js_excluded ? 'js files excluded [hit] ' . $js_excluded : 'external js')); continue; } if (strpos($attrs['src'], '/localres/') !== false) { continue; } if (strpos($attrs['src'], 'instant_click') !== false) { continue; } $this_src_arr['src'] = $attrs['src']; } // Inline JS elseif (!empty($match[2])) { // self::debug( '🌹🌹🌹 ' . $match[2] . '🌹' ); // Exclude check $js_excluded = Utility::str_hit_array($match[2], $excludes); if ($js_excluded || !$combine_ext_inl) { // Maybe defer if ($this->cfg_js_defer) { $deferred = $this->_js_inline_defer($match[2], $match[1]); if ($deferred) { $this->content = str_replace($match[0], $deferred, $this->content); } } self::debug2('_parse_js bypassed due to ' . ($js_excluded ? 'js excluded [hit] ' . $js_excluded : 'inline js')); continue; } $this_src_arr['inl'] = true; $this_src_arr['src'] = $match[2]; if ($match[1]) { $this_src_arr['attrs'] = $match[1]; } } else { // Compatibility to those who changed src to data-src already self::debug2('No JS src or inline JS content'); continue; } $src_list[] = $this_src_arr; $html_list[] = $match[0]; } return array( $src_list, $html_list ); } /** * Inline JS defer * * @since 3.0 * @access private */ private function _js_inline_defer( $con, $attrs = false, $minified = false ) { if (strpos($attrs, 'data-no-defer') !== false) { self::debug2('bypass: attr api data-no-defer'); return false; } $hit = Utility::str_hit_array($con, $this->cfg_js_defer_exc); if ($hit) { self::debug2('inline js defer excluded [setting] ' . $hit); return false; } $con = trim($con); // Minify JS first if (!$minified) { // && $this->cfg_js_defer !== 2 $con = Optimizer::minify_js($con); } if (!$con) { return false; } // Check if the content contains ESI nonce or not $con = $this->_preserve_esi($con); if ($this->cfg_js_defer === 2) { // Drop type attribute from $attrs $attrs = Utility::remove_attr( $attrs, 'type' ); // Replace DOMContentLoaded $con = str_replace('DOMContentLoaded', 'DOMContentLiteSpeedLoaded', $con); return '<script' . $attrs . ' type="litespeed/javascript">' . $con . '</script>'; // return '<script' . $attrs . ' type="litespeed/javascript" src="data:text/javascript;base64,' . base64_encode( $con ) . '"></script>'; // return '<script' . $attrs . ' type="litespeed/javascript">' . $con . '</script>'; } return '<script' . $attrs . ' src="data:text/javascript;base64,' . base64_encode($con) . '" defer></script>'; } /** * Replace ESI to JS inline var (mainly used to avoid nonce timeout) * * @since 3.5.1 */ private function _preserve_esi( $con ) { $esi_placeholder_list = $this->cls('ESI')->contain_preserve_esi($con); if (!$esi_placeholder_list) { return $con; } foreach ($esi_placeholder_list as $esi_placeholder) { $js_var = '__litespeed_var_' . self::$_var_i++ . '__'; $con = str_replace($esi_placeholder, $js_var, $con); $this->_var_preserve_js[] = $js_var . '=' . $esi_placeholder; } return $con; } /** * Parse css src and remove to-be-removed css * * @since 1.2.2 * @access private * @return array All the src & related raw html list */ private function _parse_css() { $excludes = apply_filters('litespeed_optimize_css_excludes', $this->conf(self::O_OPTM_CSS_EXC)); $ucss_file_exc_inline = apply_filters('litespeed_optimize_ucss_file_exc_inline', $this->conf(self::O_OPTM_UCSS_FILE_EXC_INLINE)); // Append dummy css to exclude list $excludes[] = 'litespeed-dummy.css'; $combine_ext_inl = $this->conf(self::O_OPTM_CSS_COMB_EXT_INL); if (!apply_filters('litespeed_optm_css_comb_ext_inl', true)) { self::debug2('css_comb_ext_inl bypassed via litespeed_optm_css_comb_ext_inl filter'); $combine_ext_inl = false; } $css_to_be_removed = apply_filters('litespeed_optm_css_to_be_removed', array()); $src_list = array(); $html_list = array(); // $dom = new \PHPHtmlParser\Dom; // $dom->load( $content );return $val; // $items = $dom->find( 'link' ); // V7 added: (?:\r\n?|\n?) to fix replacement leaving empty new line $content = preg_replace( array( '#<!--.*-->(?:\r\n?|\n?)#sU', '#<script([^>]*)>.*</script>(?:\r\n?|\n?)#isU', '#<noscript([^>]*)>.*</noscript>(?:\r\n?|\n?)#isU' ), '', $this->content ); preg_match_all('#<link ([^>]+)/?>|<style([^>]*)>([^<]+)</style>(?:\r\n?|\n?)#isU', $content, $matches, PREG_SET_ORDER); foreach ($matches as $match) { // to avoid multiple replacement if (in_array($match[0], $html_list)) { continue; } if ($exclude = Utility::str_hit_array($match[0], $excludes)) { self::debug2('_parse_css bypassed exclude ' . $exclude); continue; } $this_src_arr = array(); if (strpos($match[0], '<link') === 0) { $attrs = Utility::parse_attr($match[1]); if (empty($attrs['rel']) || $attrs['rel'] !== 'stylesheet') { continue; } if (empty($attrs['href'])) { continue; } // Check if need to remove this css if (Utility::str_hit_array($attrs['href'], $css_to_be_removed)) { self::debug('rm css snippet ' . $attrs['href']); // Delete this css snippet from orig html $this->content = str_replace($match[0], '', $this->content); continue; } // Check if need to inline this css file if ($this->conf(self::O_OPTM_UCSS) && Utility::str_hit_array($attrs['href'], $ucss_file_exc_inline)) { self::debug('ucss_file_exc_inline hit ' . $attrs['href']); // Replace this css to inline from orig html $inline_script = '<style>' . $this->__optimizer->load_file($attrs['href']) . '</style>'; $this->content = str_replace($match[0], $inline_script, $this->content); continue; } // Check Google fonts hit if (strpos($attrs['href'], 'fonts.googleapis.com') !== false) { /** * For async gg fonts, will add webfont into head, hence remove it from buffer and store the matches to use later * * @since 2.7.3 * @since 3.0 For font display optm, need to parse google fonts URL too */ if (!in_array($attrs['href'], $this->_ggfonts_urls)) { $this->_ggfonts_urls[] = $attrs['href']; } if ($this->cfg_ggfonts_rm || $this->cfg_ggfonts_async) { self::debug('rm css snippet [Google fonts] ' . $attrs['href']); $this->content = str_replace($match[0], '', $this->content); continue; } } if (isset($attrs['data-optimized'])) { // $this_src_arr[ 'exc' ] = true; continue; } elseif (!empty($attrs['data-no-optimize'])) { // $this_src_arr[ 'exc' ] = true; continue; } $is_internal = Utility::is_internal_file($attrs['href']); $ext_excluded = !$combine_ext_inl && !$is_internal; if ($ext_excluded) { self::debug2('Bypassed due to external link'); // Maybe defer if ($this->cfg_css_async) { $snippet = $this->_async_css($match[0]); if ($snippet != $match[0]) { $this->content = str_replace($match[0], $snippet, $this->content); } } continue; } if (!empty($attrs['media']) && $attrs['media'] !== 'all') { $this_src_arr['media'] = $attrs['media']; } $this_src_arr['src'] = $attrs['href']; } else { // Inline style if (!$combine_ext_inl) { self::debug2('Bypassed due to inline'); continue; } $attrs = Utility::parse_attr($match[2]); if (!empty($attrs['data-no-optimize'])) { continue; } if (!empty($attrs['media']) && $attrs['media'] !== 'all') { $this_src_arr['media'] = $attrs['media']; } $this_src_arr['inl'] = true; $this_src_arr['src'] = $match[3]; } $src_list[] = $this_src_arr; $html_list[] = $match[0]; } return array( $src_list, $html_list ); } /** * Replace css to async loaded css * * @since 1.3 * @access private */ private function _async_css_list( $html_list, $src_list ) { foreach ($html_list as $k => $ori) { if (!empty($src_list[$k]['inl'])) { continue; } $html_list[$k] = $this->_async_css($ori); } return $html_list; } /** * Async CSS snippet * * @since 3.5 */ private function _async_css( $ori ) { if (strpos($ori, 'data-asynced') !== false) { self::debug2('bypass: attr data-asynced exist'); return $ori; } if (strpos($ori, 'data-no-async') !== false) { self::debug2('bypass: attr api data-no-async'); return $ori; } // async replacement $v = str_replace('stylesheet', 'preload', $ori); $v = str_replace('<link', '<link data-asynced="1" as="style" onload="this.onload=null;this.rel=\'stylesheet\'" ', $v); // Append to noscript content if (!defined('LITESPEED_GUEST_OPTM') && !$this->conf(self::O_OPTM_NOSCRIPT_RM)) { $v .= '<noscript>' . preg_replace('/ id=\'[\w-]+\' /U', ' ', $ori) . '</noscript>'; } return $v; } /** * Defer JS snippet * * @since 3.5 */ private function _js_defer( $ori, $src ) { $ori = Utility::remove_attr( $ori, 'async' ); if (strpos($ori, 'defer') !== false) { return false; } if (strpos($ori, 'data-deferred') !== false) { self::debug2('bypass: attr data-deferred exist'); return false; } if (strpos($ori, 'data-no-defer') !== false) { self::debug2('bypass: attr api data-no-defer'); return false; } /** * Exclude JS from setting * * @since 1.5 */ if (Utility::str_hit_array($src, $this->cfg_js_defer_exc)) { self::debug('js defer exclude ' . $src); return false; } if ($this->cfg_js_defer === 2 || Utility::str_hit_array($src, $this->cfg_js_delay_inc)) { $ori = Utility::remove_attr( $ori, 'type' ); return str_replace(' src=', ' type="litespeed/javascript" data-src=', $ori); } return str_replace('></script>', ' defer data-deferred="1"></script>', $ori); } /** * Delay JS for included setting * * @since 5.6 */ private function _js_delay( $ori, $src ) { $ori = Utility::remove_attr( $ori, 'async' ); if (strpos($ori, 'defer') !== false) { return false; } if (strpos($ori, 'data-deferred') !== false) { self::debug2('bypass: attr data-deferred exist'); return false; } if (strpos($ori, 'data-no-defer') !== false) { self::debug2('bypass: attr api data-no-defer'); return false; } if (!Utility::str_hit_array($src, $this->cfg_js_delay_inc)) { return; } $ori = Utility::remove_attr( $ori, 'type' ); return str_replace(' src=', ' type="litespeed/javascript" data-src=', $ori); } }
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