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Editing: cdn.cls.php
<?php /** * The CDN class. * * @since 1.2.3 * @since 1.5 Moved into /inc * @package LiteSpeed * @subpackage LiteSpeed/inc * @author LiteSpeed Technologies <info@litespeedtech.com> */ namespace LiteSpeed; defined('WPINC') || exit(); class CDN extends Root { const BYPASS = 'LITESPEED_BYPASS_CDN'; private $content; private $_cfg_cdn; private $_cfg_url_ori; private $_cfg_ori_dir; private $_cfg_cdn_mapping = array(); private $_cfg_cdn_exclude; private $cdn_mapping_hosts = array(); /** * Init * * @since 1.2.3 */ public function init() { Debug2::debug2('[CDN] init'); if (defined(self::BYPASS)) { Debug2::debug2('CDN bypass'); return; } if (!Router::can_cdn()) { if (!defined(self::BYPASS)) { define(self::BYPASS, true); } return; } $this->_cfg_cdn = $this->conf(Base::O_CDN); if (!$this->_cfg_cdn) { if (!defined(self::BYPASS)) { define(self::BYPASS, true); } return; } $this->_cfg_url_ori = $this->conf(Base::O_CDN_ORI); // Parse cdn mapping data to array( 'filetype' => 'url' ) $mapping_to_check = array(Base::CDN_MAPPING_INC_IMG, Base::CDN_MAPPING_INC_CSS, Base::CDN_MAPPING_INC_JS); foreach ($this->conf(Base::O_CDN_MAPPING) as $v) { if (!$v[Base::CDN_MAPPING_URL]) { continue; } $this_url = $v[Base::CDN_MAPPING_URL]; $this_host = parse_url($this_url, PHP_URL_HOST); // Check img/css/js foreach ($mapping_to_check as $to_check) { if ($v[$to_check]) { Debug2::debug2('[CDN] mapping ' . $to_check . ' -> ' . $this_url); // If filetype to url is one to many, make url be an array $this->_append_cdn_mapping($to_check, $this_url); if (!in_array($this_host, $this->cdn_mapping_hosts)) { $this->cdn_mapping_hosts[] = $this_host; } } } // Check file types if ($v[Base::CDN_MAPPING_FILETYPE]) { foreach ($v[Base::CDN_MAPPING_FILETYPE] as $v2) { $this->_cfg_cdn_mapping[Base::CDN_MAPPING_FILETYPE] = true; // If filetype to url is one to many, make url be an array $this->_append_cdn_mapping($v2, $this_url); if (!in_array($this_host, $this->cdn_mapping_hosts)) { $this->cdn_mapping_hosts[] = $this_host; } } Debug2::debug2('[CDN] mapping ' . implode(',', $v[Base::CDN_MAPPING_FILETYPE]) . ' -> ' . $this_url); } } if (!$this->_cfg_url_ori || !$this->_cfg_cdn_mapping) { if (!defined(self::BYPASS)) { define(self::BYPASS, true); } return; } $this->_cfg_ori_dir = $this->conf(Base::O_CDN_ORI_DIR); // In case user customized upload path if (defined('UPLOADS')) { $this->_cfg_ori_dir[] = UPLOADS; } // Check if need preg_replace $this->_cfg_url_ori = Utility::wildcard2regex($this->_cfg_url_ori); $this->_cfg_cdn_exclude = $this->conf(Base::O_CDN_EXC); if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_IMG])) { // Hook to srcset if (function_exists('wp_calculate_image_srcset')) { add_filter('wp_calculate_image_srcset', array($this, 'srcset'), 999); } // Hook to mime icon add_filter('wp_get_attachment_image_src', array($this, 'attach_img_src'), 999); add_filter('wp_get_attachment_url', array($this, 'url_img'), 999); } if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_CSS])) { add_filter('style_loader_src', array($this, 'url_css'), 999); } if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_JS])) { add_filter('script_loader_src', array($this, 'url_js'), 999); } add_filter('litespeed_buffer_finalize', array($this, 'finalize'), 30); } /** * Associate all filetypes with url * * @since 2.0 * @access private */ private function _append_cdn_mapping($filetype, $url) { // If filetype to url is one to many, make url be an array if (empty($this->_cfg_cdn_mapping[$filetype])) { $this->_cfg_cdn_mapping[$filetype] = $url; } elseif (is_array($this->_cfg_cdn_mapping[$filetype])) { // Append url to filetype $this->_cfg_cdn_mapping[$filetype][] = $url; } else { // Convert _cfg_cdn_mapping from string to array $this->_cfg_cdn_mapping[$filetype] = array($this->_cfg_cdn_mapping[$filetype], $url); } } /** * If include css/js in CDN * * @since 1.6.2.1 * @return bool true if included in CDN */ public function inc_type($type) { if ($type == 'css' && !empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_CSS])) { return true; } if ($type == 'js' && !empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_JS])) { return true; } return false; } /** * Run CDN process * NOTE: As this is after cache finalized, can NOT set any cache control anymore * * @since 1.2.3 * @access public * @return string The content that is after optimization */ public function finalize($content) { $this->content = $content; $this->_finalize(); return $this->content; } /** * Replace CDN url * * @since 1.2.3 * @access private */ private function _finalize() { if (defined(self::BYPASS)) { return; } Debug2::debug('CDN _finalize'); // Start replacing img src if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_IMG])) { $this->_replace_img(); $this->_replace_inline_css(); } if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_FILETYPE])) { $this->_replace_file_types(); } } /** * Parse all file types * * @since 1.2.3 * @access private */ private function _replace_file_types() { $ele_to_check = $this->conf(Base::O_CDN_ATTR); foreach ($ele_to_check as $v) { if (!$v || strpos($v, '.') === false) { Debug2::debug2('[CDN] replace setting bypassed: no . attribute ' . $v); continue; } Debug2::debug2('[CDN] replace attribute ' . $v); $v = explode('.', $v); $attr = preg_quote($v[1], '#'); if ($v[0]) { $pattern = '#<' . preg_quote($v[0], '#') . '([^>]+)' . $attr . '=([\'"])(.+)\g{2}#iU'; } else { $pattern = '# ' . $attr . '=([\'"])(.+)\g{1}#iU'; } preg_match_all($pattern, $this->content, $matches); if (empty($matches[$v[0] ? 3 : 2])) { continue; } foreach ($matches[$v[0] ? 3 : 2] as $k2 => $url) { // Debug2::debug2( '[CDN] check ' . $url ); $postfix = '.' . pathinfo((string) parse_url($url, PHP_URL_PATH), PATHINFO_EXTENSION); if (!array_key_exists($postfix, $this->_cfg_cdn_mapping)) { // Debug2::debug2( '[CDN] non-existed postfix ' . $postfix ); continue; } Debug2::debug2('[CDN] matched file_type ' . $postfix . ' : ' . $url); if (!($url2 = $this->rewrite($url, Base::CDN_MAPPING_FILETYPE, $postfix))) { continue; } $attr = str_replace($url, $url2, $matches[0][$k2]); $this->content = str_replace($matches[0][$k2], $attr, $this->content); } } } /** * Parse all images * * @since 1.2.3 * @access private */ private function _replace_img() { preg_match_all('#<img([^>]+?)src=([\'"\\\]*)([^\'"\s\\\>]+)([\'"\\\]*)([^>]*)>#i', $this->content, $matches); foreach ($matches[3] as $k => $url) { // Check if is a DATA-URI if (strpos($url, 'data:image') !== false) { continue; } if (!($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_IMG))) { continue; } $html_snippet = sprintf('<img %1$s src=%2$s %3$s>', $matches[1][$k], $matches[2][$k] . $url2 . $matches[4][$k], $matches[5][$k]); $this->content = str_replace($matches[0][$k], $html_snippet, $this->content); } } /** * Parse and replace all inline styles containing url() * * @since 1.2.3 * @access private */ private function _replace_inline_css() { Debug2::debug2('[CDN] _replace_inline_css', $this->_cfg_cdn_mapping); /** * Excludes `\` from URL matching * @see #959152 - WordPress LSCache CDN Mapping causing malformed URLS * @see #685485 * @since 3.0 */ preg_match_all('/url\((?![\'"]?data)[\'"]?([^\)\'"\\\]+)[\'"]?\)/i', $this->content, $matches); foreach ($matches[1] as $k => $url) { $url = str_replace(array(' ', '\t', '\n', '\r', '\0', '\x0B', '"', "'", '"', '''), '', $url); // Parse file postfix $postfix = '.' . pathinfo(parse_url($url, PHP_URL_PATH), PATHINFO_EXTENSION); if (array_key_exists($postfix, $this->_cfg_cdn_mapping)) { Debug2::debug2('[CDN] matched file_type ' . $postfix . ' : ' . $url); if (!($url2 = $this->rewrite($url, Base::CDN_MAPPING_FILETYPE, $postfix))) { continue; } } elseif (in_array($postfix, array('jpg', 'jpeg', 'png', 'gif', 'svg', 'webp', 'avif'))) { if (!($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_IMG))) { continue; } } else { continue; } $attr = str_replace($matches[1][$k], $url2, $matches[0][$k]); $this->content = str_replace($matches[0][$k], $attr, $this->content); } Debug2::debug2('[CDN] _replace_inline_css done'); } /** * Hook to wp_get_attachment_image_src * * @since 1.2.3 * @since 1.7 Removed static from function * @access public * @param array $img The URL of the attachment image src, the width, the height * @return array */ public function attach_img_src($img) { if ($img && ($url = $this->rewrite($img[0], Base::CDN_MAPPING_INC_IMG))) { $img[0] = $url; } return $img; } /** * Try to rewrite one URL with CDN * * @since 1.7 * @access public */ public function url_img($url) { if ($url && ($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_IMG))) { $url = $url2; } return $url; } /** * Try to rewrite one URL with CDN * * @since 1.7 * @access public */ public function url_css($url) { if ($url && ($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_CSS))) { $url = $url2; } return $url; } /** * Try to rewrite one URL with CDN * * @since 1.7 * @access public */ public function url_js($url) { if ($url && ($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_JS))) { $url = $url2; } return $url; } /** * Hook to replace WP responsive images * * @since 1.2.3 * @since 1.7 Removed static from function * @access public * @param array $srcs * @return array */ public function srcset($srcs) { if ($srcs) { foreach ($srcs as $w => $data) { if (!($url = $this->rewrite($data['url'], Base::CDN_MAPPING_INC_IMG))) { continue; } $srcs[$w]['url'] = $url; } } return $srcs; } /** * Replace URL to CDN URL * * @since 1.2.3 * @access public * @param string $url * @return string Replaced URL */ public function rewrite($url, $mapping_kind, $postfix = false) { Debug2::debug2('[CDN] rewrite ' . $url); $url_parsed = parse_url($url); if (empty($url_parsed['path'])) { Debug2::debug2('[CDN] -rewrite bypassed: no path'); return false; } // Only images under wp-cotnent/wp-includes can be replaced $is_internal_folder = Utility::str_hit_array($url_parsed['path'], $this->_cfg_ori_dir); if (!$is_internal_folder) { Debug2::debug2('[CDN] -rewrite failed: path not match: ' . LSCWP_CONTENT_FOLDER); return false; } // Check if is external url if (!empty($url_parsed['host'])) { if (!Utility::internal($url_parsed['host']) && !$this->_is_ori_url($url)) { Debug2::debug2('[CDN] -rewrite failed: host not internal'); return false; } } $exclude = Utility::str_hit_array($url, $this->_cfg_cdn_exclude); if ($exclude) { Debug2::debug2('[CDN] -abort excludes ' . $exclude); return false; } // Fill full url before replacement if (empty($url_parsed['host'])) { $url = Utility::uri2url($url); Debug2::debug2('[CDN] -fill before rewritten: ' . $url); $url_parsed = parse_url($url); } $scheme = !empty($url_parsed['scheme']) ? $url_parsed['scheme'] . ':' : ''; if ($scheme) { // Debug2::debug2( '[CDN] -scheme from url: ' . $scheme ); } // Find the mapping url to be replaced to if (empty($this->_cfg_cdn_mapping[$mapping_kind])) { return false; } if ($mapping_kind !== Base::CDN_MAPPING_FILETYPE) { $final_url = $this->_cfg_cdn_mapping[$mapping_kind]; } else { // select from file type $final_url = $this->_cfg_cdn_mapping[$postfix]; } // If filetype to url is one to many, need to random one if (is_array($final_url)) { $final_url = $final_url[mt_rand(0, count($final_url) - 1)]; } // Now lets replace CDN url foreach ($this->_cfg_url_ori as $v) { if (strpos($v, '*') !== false) { $url = preg_replace('#' . $scheme . $v . '#iU', $final_url, $url); } else { $url = str_replace($scheme . $v, $final_url, $url); } } Debug2::debug2('[CDN] -rewritten: ' . $url); return $url; } /** * Check if is original URL of CDN or not * * @since 2.1 * @access private */ private function _is_ori_url($url) { $url_parsed = parse_url($url); $scheme = !empty($url_parsed['scheme']) ? $url_parsed['scheme'] . ':' : ''; foreach ($this->_cfg_url_ori as $v) { $needle = $scheme . $v; if (strpos($v, '*') !== false) { if (preg_match('#' . $needle . '#iU', $url)) { return true; } } else { if (strpos($url, $needle) === 0) { return true; } } } return false; } /** * Check if the host is the CDN internal host * * @since 1.2.3 * */ public static function internal($host) { if (defined(self::BYPASS)) { return false; } $instance = self::cls(); return in_array($host, $instance->cdn_mapping_hosts); // todo: can add $this->_is_ori_url() check in future } }
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