name : optimizer.cls.php <?php /** * The optimize4 class. * * @since 1.9 * @package LiteSpeed * @subpackage LiteSpeed/inc * @author LiteSpeed Technologies <info@litespeedtech.com> */ namespace LiteSpeed; defined('WPINC') || exit(); class Optimizer extends Root { private $_conf_css_font_display; /** * Init optimizer * * @since 1.9 */ public function __construct() { $this->_conf_css_font_display = $this->conf(Base::O_OPTM_CSS_FONT_DISPLAY); } /** * Run HTML minify process and return final content * * @since 1.9 * @access public */ public function html_min($content, $force_inline_minify = false) { if (!apply_filters('litespeed_html_min', true)) { Debug2::debug2('[Optmer] html_min bypassed via litespeed_html_min filter'); return $content; } $options = array(); if ($force_inline_minify) { $options['jsMinifier'] = __CLASS__ . '::minify_js'; } $skip_comments = $this->conf(Base::O_OPTM_HTML_SKIP_COMMENTS); if ($skip_comments) { $options['skipComments'] = $skip_comments; } /** * Added exception capture when minify * @since 2.2.3 */ try { $obj = new Lib\HTML_MIN($content, $options); $content_final = $obj->process(); // check if content from minification is empty if ($content_final == '') { Debug2::debug('Failed to minify HTML: HTML minification resulted in empty HTML'); return $content; } if (!defined('LSCACHE_ESI_SILENCE')) { $content_final .= "\n" . '<!-- Page optimized by LiteSpeed Cache @' . date('Y-m-d H:i:s', time() + LITESPEED_TIME_OFFSET) . ' -->'; } return $content_final; } catch (\Exception $e) { Debug2::debug('******[Optmer] html_min failed: ' . $e->getMessage()); error_log('****** LiteSpeed Optimizer html_min failed: ' . $e->getMessage()); return $content; } } /** * Run minify process and save content * * @since 1.9 * @access public */ public function serve($request_url, $file_type, $minify, $src_list) { // Try Unique CSS if ($file_type == 'css') { $content = false; if (defined('LITESPEED_GUEST_OPTM') || $this->conf(Base::O_OPTM_UCSS)) { $filename = $this->cls('UCSS')->load($request_url); if ($filename) { return array($filename, 'ucss'); } } } // Before generated, don't know the contented hash filename yet, so used url hash as tmp filename $file_path_prefix = $this->_build_filepath_prefix($file_type); $url_tag = $request_url; $url_tag_for_file = md5($request_url); if (is_404()) { $url_tag_for_file = $url_tag = '404'; } elseif ($file_type == 'css' && apply_filters('litespeed_ucss_per_pagetype', false)) { $url_tag_for_file = $url_tag = Utility::page_type(); } $static_file = LITESPEED_STATIC_DIR . $file_path_prefix . $url_tag_for_file . '.' . $file_type; // Create tmp file to avoid conflict $tmp_static_file = $static_file . '.tmp'; if (file_exists($tmp_static_file) && time() - filemtime($tmp_static_file) <= 600) { // some other request is generating return false; } // File::save( $tmp_static_file, '/* ' . ( is_404() ? '404' : $request_url ) . ' */', true ); // Can't use this bcos this will get filecon md5 changed File::save($tmp_static_file, '', true); // Load content $real_files = array(); foreach ($src_list as $src_info) { $is_min = false; if (!empty($src_info['inl'])) { // Load inline $content = $src_info['src']; } else { // Load file $content = $this->load_file($src_info['src'], $file_type); if (!$content) { continue; } $is_min = $this->is_min($src_info['src']); } $content = $this->optm_snippet($content, $file_type, $minify && !$is_min, $src_info['src'], !empty($src_info['media']) ? $src_info['media'] : false); // Write to file File::save($tmp_static_file, $content, true, true); } // validate md5 $filecon_md5 = md5_file($tmp_static_file); $final_file_path = $file_path_prefix . $filecon_md5 . '.' . $file_type; $realfile = LITESPEED_STATIC_DIR . $final_file_path; if (!file_exists($realfile)) { rename($tmp_static_file, $realfile); Debug2::debug2('[Optmer] Saved static file [path] ' . $realfile); } else { unlink($tmp_static_file); } $vary = $this->cls('Vary')->finalize_full_varies(); Debug2::debug2("[Optmer] Save URL to file for [file_type] $file_type [file] $filecon_md5 [vary] $vary "); $this->cls('Data')->save_url($url_tag, $vary, $file_type, $filecon_md5, dirname($realfile)); return array($filecon_md5 . '.' . $file_type, $file_type); } /** * Load a single file * @since 4.0 */ public function optm_snippet($content, $file_type, $minify, $src, $media = false) { // CSS related features if ($file_type == 'css') { // Font optimize if ($this->_conf_css_font_display) { $content = preg_replace('#(@font\-face\s*\{)#isU', '${1}font-display:swap;', $content); } $content = preg_replace('/@charset[^;]+;\\s*/', '', $content); if ($media) { $content = '@media ' . $media . '{' . $content . "\n}"; } if ($minify) { $content = self::minify_css($content); } $content = $this->cls('CDN')->finalize($content); if ((defined('LITESPEED_GUEST_OPTM') || $this->conf(Base::O_IMG_OPTM_WEBP)) && $this->cls('Media')->webp_support()) { $content = $this->cls('Media')->replace_background_webp($content); } } else { if ($minify) { $content = self::minify_js($content); } else { $content = $this->_null_minifier($content); } $content .= "\n;"; } // Add filter $content = apply_filters('litespeed_optm_cssjs', $content, $file_type, $src); return $content; } /** * Load remote resource from cache if existed * * @since 4.7 */ private function load_cached_file($url, $file_type) { $file_path_prefix = $this->_build_filepath_prefix($file_type); $folder_name = LITESPEED_STATIC_DIR . $file_path_prefix; $to_be_deleted_folder = $folder_name . date('Ymd', strtotime('-2 days')); if (file_exists($to_be_deleted_folder)) { Debug2::debug('[Optimizer] ❌ Clearning folder [name] ' . $to_be_deleted_folder); File::rrmdir($to_be_deleted_folder); } $today_file = $folder_name . date('Ymd') . '/' . md5($url); if (file_exists($today_file)) { return File::read($today_file); } // Write file $res = wp_remote_get($url); $res_code = wp_remote_retrieve_response_code($res); if (is_wp_error($res) || $res_code != 200) { Debug2::debug2('[Optimizer] ❌ Load Remote error [code] ' . $res_code); return false; } $con = wp_remote_retrieve_body($res); if (!$con) { return false; } Debug2::debug('[Optimizer] ✅ Save remote file to cache [name] ' . $today_file); File::save($today_file, $con, true); return $con; } /** * Load remote/local resource * * @since 3.5 */ public function load_file($src, $file_type = 'css') { $real_file = Utility::is_internal_file($src); $postfix = pathinfo(parse_url($src, PHP_URL_PATH), PATHINFO_EXTENSION); if (!$real_file || $postfix != $file_type) { Debug2::debug2('[CSS] Load Remote [' . $file_type . '] ' . $src); $this_url = substr($src, 0, 2) == '//' ? set_url_scheme($src) : $src; $con = $this->load_cached_file($this_url, $file_type); if ($file_type == 'css') { $dirname = dirname($this_url) . '/'; $con = Lib\CSS_MIN\UriRewriter::prepend($con, $dirname); } } else { Debug2::debug2('[CSS] Load local [' . $file_type . '] ' . $real_file[0]); $con = File::read($real_file[0]); if ($file_type == 'css') { $dirname = dirname($real_file[0]); $con = Lib\CSS_MIN\UriRewriter::rewrite($con, $dirname); } } return $con; } /** * Minify CSS * * @since 2.2.3 * @access private */ public static function minify_css($data) { try { $obj = new Lib\CSS_MIN\Minifier(); return $obj->run($data); } catch (\Exception $e) { Debug2::debug('******[Optmer] minify_css failed: ' . $e->getMessage()); error_log('****** LiteSpeed Optimizer minify_css failed: ' . $e->getMessage()); return $data; } } /** * Minify JS * * Added exception capture when minify * * @since 2.2.3 * @access private */ public static function minify_js($data, $js_type = '') { // For inline JS optimize, need to check if it's js type if ($js_type) { preg_match('#type=([\'"])(.+)\g{1}#isU', $js_type, $matches); if ($matches && $matches[2] != 'text/javascript') { Debug2::debug('******[Optmer] minify_js bypass due to type: ' . $matches[2]); return $data; } } try { $data = Lib\JSMin::minify($data); return $data; } catch (\Exception $e) { Debug2::debug('******[Optmer] minify_js failed: ' . $e->getMessage()); // error_log( '****** LiteSpeed Optimizer minify_js failed: ' . $e->getMessage() ); return $data; } } /** * Basic minifier * * @access private */ private function _null_minifier($content) { $content = str_replace("\r\n", "\n", $content); return trim($content); } /** * Check if the file is already min file * * @since 1.9 */ public function is_min($filename) { $basename = basename($filename); if (preg_match('/[-\.]min\.(?:[a-zA-Z]+)$/i', $basename)) { return true; } return false; } }