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<?php
/**
* The optimize class.
*
* @since 1.2.2
*/
namespace LiteSpeed;
defined( 'WPINC' ) || exit;
class Optimize extends Base {
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';
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_defer;
private $cfg_js_defer_exc = false;
private $cfg_ggfonts_async;
private $_conf_css_font_display;
private $cfg_ggfonts_rm;
private $dns_prefetch;
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 prepend to <body>
private static $_var_i = 0;
private $_var_preserve_js = array();
private $_request_url;
/**
* Constructor
* @since 4.0
*/
public function __construct() {
Debug2::debug( '[Optm] 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->conf( self::O_API_KEY ) ) {
Debug2::debug( '[Optm] ❌ CCSS set to OFF due to missing domain key' );
$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 ) ) {
Debug2::debug( '[Optm] ❌ 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 ) );
}
}
/**
* Add vary filter for Role Excludes
* @since 1.6
*/
add_filter( 'litespeed_vary', array( $this, 'vary_add_role_exclude' ) );
/**
* Prefetch DNS
* @since 1.7.1
*/
$this->_dns_prefetch_init();
add_filter( 'litespeed_buffer_finalize', array( $this, 'finalize' ), 20 );
}
/**
* 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 ) {
if ( defined( 'LITESPEED_NO_PAGEOPTM' ) ) {
Debug2::debug2( '[Optm] bypass: NO_PAGEOPTM const' );
return $content;
}
if ( ! defined( 'LITESPEED_IS_HTML' ) ) {
Debug2::debug( '[Optm] bypass: Not frontend HTML type' );
return $content;
}
if ( ! defined( 'LITESPEED_GUEST_OPTM' ) ) {
if ( ! Control::is_cacheable() ) {
Debug2::debug( '[Optm] 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 ) {
Debug2::debug( '[Optm] bypass: hit URI Excludes setting: ' . $result );
return $content;
}
}
Debug2::debug( '[Optm] 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;
$this->_request_url = home_url( $wp->request );
$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() ) {
Debug2::debug( '[Optm] bypass: admin/feed/preview' );
return;
}
if ( $this->cfg_css_async ) {
$this->_ccss = $this->cls( 'CSS' )->prepare_ccss();
if ( ! $this->_ccss ) {
Debug2::debug( '[Optm] ❌ CCSS set to OFF due to CCSS not generated yet' );
$this->cfg_css_async = false;
}
else if ( strpos( $this->_ccss, '<style id="litespeed-ccss" data-error' ) === 0 ) {
Debug2::debug( '[Optm] ❌ 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="' . $url . '" />'; // todo: How to use " in attr wrapper "
}
else {
$this->html_head .= '<link data-optimized="2" rel="stylesheet" href="' . $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 ) {
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
else {
if ( $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 );
}
}
}
}
}
}
// 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>';
Debug2::debug2( '[Optm] 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, 'litespeed-css-async-lib' ); // 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 = 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 be after charset
if ( strpos( $this->content, '<meta charset' ) !== false ) {
$this->content = preg_replace( '#<meta charset([^>]*)>#isU', '<meta charset$1>' . $this->html_head , $this->content, 1 );
}
else {
$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 );
}
// 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 ) {
return '<script data-optimized="1" type="litespeed/javascript" data-src="' . $src . '"></script>';
}
if ( $this->cfg_js_defer ) {
return '<script data-optimized="1" src="' . $src . '" defer></script>';
}
return '<script data-optimized="1" src="' . $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 ) {
return;
}
$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;
}
Debug2::debug2( '[Optm] google fonts async found: ', $this->_ggfonts_urls );
$html = '<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' ] ) ) {
Debug2::debug( '[Optm] ERR ggfonts failed to find family: ' . $v );
continue;
}
$subset = empty( $qs[ 'subset' ] ) ? '' : ':' . $qs[ 'subset' ];
foreach ( array_filter( explode( '|', $qs[ 'family' ] ) ) as $v2 ) {
$families[] = $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;
}
Debug2::debug2( '[Optm] 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
* @access private
*/
private function _dns_prefetch_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 );
if ( ! $this->dns_prefetch ) {
return;
}
if ( function_exists( 'wp_resource_hints' ) ) {
add_filter( 'wp_resource_hints', array( $this, 'dns_prefetch_filter' ), 10, 2 );
}
else {
add_action( 'litespeed_optm', array( $this, 'dns_prefetch_output' ) );
}
}
/**
* Prefetch DNS hook for WP
*
* @since 1.7.1
* @access public
*/
public function dns_prefetch_filter( $urls, $relation_type ) {
if ( $relation_type !== 'dns-prefetch' ) {
return $urls;
}
foreach ( $this->dns_prefetch as $v ) {
if ( $v ) {
$urls[] = $v;
}
}
return $urls;
}
/**
* Prefetch DNS
*
* @since 1.7.1
* @access public
*/
public function dns_prefetch_output() {
foreach ( $this->dns_prefetch as $v ) {
if ( $v ) {
$this->html_head .= '<link rel="dns-prefetch" href="' . $v . '" />';
}
}
}
/**
* 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 = ( defined( 'LITESPEED_GUEST_OPTM' ) || $this->conf( Base::O_IMG_OPTM_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 alreay realted 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 );
$src_list = array();
$html_list = array();
$content = preg_replace( '#<!--.*-->#sU', '', $this->content );
preg_match_all( '#<script([^>]*)>(.*)</script>#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 );
}
}
Debug2::debug2( '[Optm] _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 ] ) ) {
// Debug2::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 );
}
}
Debug2::debug2( '[Optm] _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
Debug2::debug2( '[Optm] 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 ) {
Debug2::debug2( '[Optm] bypass: attr api data-no-defer' );
return false;
}
$hit = Utility::str_hit_array( $con, $this->cfg_js_defer_exc );
if ( $hit ) {
Debug2::debug2( '[Optm] 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
if ( strpos( $attrs, ' type=' ) !== false ) {
$attrs = preg_replace( '# type=([\'"])([^\1]+)\1#isU', '', $attrs );
}
// 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 ) );
$combine_ext_inl = $this->conf( self::O_OPTM_CSS_COMB_EXT_INL );
$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' );
$content = preg_replace( array( '#<!--.*-->#sU', '#<script([^>]*)>.*</script>#isU', '#<noscript([^>]*)>.*</noscript>#isU' ), '', $this->content );
preg_match_all( '#<link ([^>]+)/?>|<style([^>]*)>([^<]+)</style>#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 ) ) {
Debug2::debug2( '[Optm] _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 ) ) {
Debug2::debug( '[Optm] 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 ( Utility::str_hit_array( $attrs[ 'href' ], $ucss_file_exc_inline ) ) {
Debug2::debug( '[Optm] 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 ) {
Debug2::debug( '[Optm] 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 ) {
Debug2::debug2( '[Optm] 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 ) {
Debug2::debug2( '[Optm] 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 ) {
Debug2::debug2( '[Optm] bypass: attr data-asynced exist' );
return $ori;
}
if ( strpos( $ori, 'data-no-async' ) !== false ) {
Debug2::debug2( '[Optm] 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 ) {
if ( strpos( $ori, ' async' ) !== false ) {
$ori = str_replace( ' async', '', $ori );
}
if ( strpos( $ori, 'defer' ) !== false ) {
return false;
}
if ( strpos( $ori, 'data-deferred' ) !== false ) {
Debug2::debug2( '[Optm] bypass: attr data-deferred exist' );
return false;
}
if ( strpos( $ori, 'data-no-defer' ) !== false ) {
Debug2::debug2( '[Optm] 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 ) ) {
Debug2::debug( '[Optm] js defer exclude ' . $src );
return false;
}
if ( $this->cfg_js_defer === 2 ) {
if ( strpos( $ori, ' type=' ) !== false ) {
$ori = preg_replace( '# type=([\'"])([^\1]+)\1#isU', '', $ori );
}
return str_replace( ' src=', ' type="litespeed/javascript" data-src=', $ori );
}
return str_replace( '></script>', ' defer data-deferred="1"></script>', $ori );
}
}