Your IP : 3.21.43.26
<?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( 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;
}
}
else {
if ( ! $url2 = $this->rewrite( $url, Base::CDN_MAPPING_INC_IMG ) ) {
continue;
}
}
$attr = str_replace( $matches[ 1 ][ $k ], $url2, $matches[ 0 ][ $k ] );
$this->content = str_replace( $matches[ 0 ][ $k ], $attr, $this->content );
}
}
/**
* 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 orignal 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
}
}