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<?php
/**
* The optimize class.
*
* @since 1.2.2
* @since 1.5 Moved into /inc
* @package LiteSpeed
* @subpackage LiteSpeed/inc
* @author LiteSpeed Technologies <info@litespeedtech.com>
*/
namespace LiteSpeed;
defined( 'WPINC' ) || exit;
class Optimize extends Base {
protected static $_instance;
const LIB_FILE_CSS_ASYNC = 'assets/js/css_async.min.js';
const LIB_FILE_WEBFONTLOADER = 'assets/js/webfontloader.min.js';
const ITEM_TIMESTAMP_PURGE_CSS = 'timestamp_purge_css';
private $content;
private $content_ori;
private $http2_headers = array();
private $cfg_http2_css;
private $cfg_http2_js;
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_inline_defer;
private $cfg_js_defer_exc = false;
private $cfg_ggfonts_async;
private $_conf_css_font_display;
private $cfg_ttl;
private $cfg_ggfonts_rm;
private $dns_prefetch;
private $_ggfonts_urls = array();
private $__data;
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();
/**
*
* @since 1.2.2
* @access protected
*/
protected function __construct() {
$this->__data = Data::get_instance();
}
/**
* Init optimizer
*
* @since 3.0
* @access protected
*/
public function init() {
$this->cfg_css_async = Conf::val( Base::O_OPTM_CSS_ASYNC );
if ( $this->cfg_css_async && ! Conf::val( Base::O_API_KEY ) ) {
Debug2::debug( '[Optm] ❌ CCSS set to OFF due to lack of domain key' );
$this->cfg_css_async = false;
}
$this->cfg_js_defer = Conf::val( Base::O_OPTM_JS_DEFER );
$this->cfg_js_inline_defer = Conf::val( Base::O_OPTM_JS_INLINE_DEFER );
if ( ! Router::can_optm() ) {
return;
}
// To remove emoji from WP
if ( Conf::val( Base::O_OPTM_EMOJI_RM ) ) {
$this->_emoji_rm();
}
if ( Conf::val( Base::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 );
}
/**
* Exclude js from deferred setting
* @since 1.5
*/
if ( $this->cfg_js_defer || $this->cfg_js_inline_defer ) {
add_filter( 'litespeed_optm_js_defer_exc', array( $this->__data, 'load_js_defer_exc' ) );
$this->cfg_js_defer_exc = apply_filters( 'litespeed_optm_js_defer_exc', Conf::val( Base::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();
}
/**
* Exclude role from optimization filter
*
* @since 1.6
* @access public
*/
public function vary_add_role_exclude( $vary ) {
if ( Conf::get_instance()->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' );
}
/**
* Check if the request is for static file
*
* @since 1.2.2
* @since 3.0 Renamed func. Changed access to public
* @access public
*/
public function serve_satic( $uri ) {
$this->cfg_css_min = Conf::val( Base::O_OPTM_CSS_MIN );
$this->cfg_css_comb = Conf::val( Base::O_OPTM_CSS_COMB );
$this->cfg_js_min = Conf::val( Base::O_OPTM_JS_MIN );
$this->cfg_js_comb = Conf::val( Base::O_OPTM_JS_COMB );
$this->cfg_ttl = Conf::val( Base::O_OPTM_TTL );
// If not turn on min files
if ( ! $this->cfg_css_min && ! $this->cfg_css_comb && ! $this->cfg_js_min && ! $this->cfg_js_comb ) {
return;
}
// try to match `xx.css`
if ( ! preg_match( '#^(\w+)\.(css|js)#U', $uri, $match ) ) {
return;
}
Debug2::debug( '[Optm] start minifying file' );
// Proceed css/js file generation
define( 'LITESPEED_MIN_FILE', true );
$file_type = $match[ 2 ];
$static_file = LITESPEED_STATIC_DIR . '/cssjs/' . $match[ 0 ];
// Even if hit PHP, still check if the file is valid to bypass minify process
if ( ! file_exists( $static_file ) || time() - filemtime( $static_file ) > $this->cfg_ttl ) {
$concat_only = ! ( $file_type === 'css' ? $this->cfg_css_min : $this->cfg_js_min );
$res = Optimizer::get_instance()->serve( $match[ 0 ], $concat_only );
if ( ! $res ) {
Debug2::debug( '[Optm] Static file generation bypassed due to empty' );
return;
}
}
else {
// Load file from file based cache if not expired
Debug2::debug2( '[Optm] Static file available' );
}
$url = LITESPEED_STATIC_URL . '/cssjs/' . $match[ 0 ];
Debug2::debug( '[Optm] Redirect to ' . $url );
wp_redirect( $url );
exit;
}
/**
* Delete file-based cache folder
*
* @since 2.1
* @access public
*/
public function rm_cache_folder() {
if ( file_exists( LITESPEED_STATIC_DIR . '/cssjs' ) ) {
File::rrmdir( LITESPEED_STATIC_DIR . '/cssjs' );
}
}
/**
* 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 ( strpos( $src, '.js?' ) !== false || strpos( $src, '.css?' ) !== false ) {
$src = preg_replace( '/\?.*/', '', $src );
}
return $src;
}
/**
* Check if need db table or not
*
* @since 3.0
* @access public
*/
public static function need_db() {
if ( Conf::val( Base::O_OPTM_CSS_MIN ) ) {
return true;
}
if ( Conf::val( Base::O_OPTM_CSS_COMB ) ) {
return true;
}
if ( Conf::val( Base::O_OPTM_JS_MIN ) ) {
return true;
}
if ( Conf::val( Base::O_OPTM_JS_COMB ) ) {
return true;
}
return false;
}
/**
* 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 static function finalize( $content ) {
if ( defined( 'LITESPEED_MIN_FILE' ) ) {// Must have this to avoid css/js from optimization again ( But can be removed as mini file doesn't have LITESPEED_IS_HTML, keep for efficiency)
return $content;
}
if ( ! defined( 'LITESPEED_IS_HTML' ) ) {
Debug2::debug( '[Optm] bypass: Not frontend HTML type' );
return $content;
}
// Check if hit URI excludes
$excludes = Conf::val( Base::O_OPTM_EXC );
if ( ! empty( $excludes ) ) {
$result = Utility::str_hit_array( $_SERVER[ 'REQUEST_URI' ], $excludes );
if ( $result ) {
Debug2::debug( '[Optm] bypass: hit URI Excludes setting: ' . $result );
return $content;
}
}
// Check if is exclude optm roles ( Need to set Vary too )
if ( $result = Conf::get_instance()->in_optm_exc_roles() ) {
Debug2::debug( '[Optm] bypass: hit Role Excludes setting: ' . $result );
return $content;
}
Debug2::debug( '[Optm] start' );
$instance = self::get_instance();
$instance->content_ori = $instance->content = $content;
$instance->_optimize();
return $instance->content;
}
/**
* Optimize css src
*
* @since 1.2.2
* @access private
*/
private function _optimize() {
$this->cfg_http2_css = Conf::val( Base::O_OPTM_CSS_HTTP2 );
$this->cfg_http2_js = Conf::val( Base::O_OPTM_JS_HTTP2 );
$this->cfg_css_min = Conf::val( Base::O_OPTM_CSS_MIN );
$this->cfg_css_comb = Conf::val( Base::O_OPTM_CSS_COMB );
$this->cfg_js_min = Conf::val( Base::O_OPTM_JS_MIN );
$this->cfg_js_comb = Conf::val( Base::O_OPTM_JS_COMB );
$this->cfg_ggfonts_async = Conf::val( Base::O_OPTM_GGFONTS_ASYNC );
$this->_conf_css_font_display = Conf::val( Base::O_OPTM_CSS_FONT_DISPLAY );
if ( ! empty( Base::$CSS_FONT_DISPLAY_SET[ $this->_conf_css_font_display ] ) ) {
$this->_conf_css_font_display = Base::$CSS_FONT_DISPLAY_SET[ $this->_conf_css_font_display ];
}
$this->cfg_ttl = Conf::val( Base::O_OPTM_TTL );
$this->cfg_ggfonts_rm = Conf::val( Base::O_OPTM_GGFONTS_RM );
if ( ! Router::can_optm() ) {
Debug2::debug( '[Optm] bypass: admin/feed/preview' );
return;
}
do_action( 'litespeed_optm' );
// Parse css from content
if ( $this->cfg_css_min || $this->cfg_css_comb || $this->cfg_http2_css || $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->__data, 'load_css_exc' ) );
list( $src_list, $html_list ) = $this->_parse_css();
}
// css optimizer
if ( $this->cfg_css_min || $this->cfg_css_comb || $this->cfg_http2_css ) {
if ( $src_list ) {
// IF combine
if ( $this->cfg_css_comb ) {
$url = $this->_build_hash_url( $src_list );
// 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 );
// Add to HTTP2
$this->append_http2( $url );
}
// 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;
}
$this->append_http2( $src_info[ 'src' ] );
}
}
}
}
// 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
if ( $this->cfg_js_min || $this->cfg_js_comb || $this->cfg_http2_js || $this->cfg_js_defer || $this->cfg_js_inline_defer ) {
add_filter( 'litespeed_optimize_js_excludes', array( $this->__data, 'load_js_exc' ) );
list( $src_list, $html_list ) = $this->_parse_js();
}
// js optimizer
if ( $this->cfg_js_min || $this->cfg_js_comb || $this->cfg_http2_js ) {
if ( $src_list ) {
// IF combine
if ( $this->cfg_js_comb ) {
$url = $this->_build_hash_url( $src_list, 'js' );
$this->html_foot .= '<script data-optimized="1" src="' . $url . '" ' . ( $this->cfg_js_defer ? 'defer' : '' ) . '></script>';
// Add to HTTP2
$this->append_http2( $url, 'js' );
// 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
else {
foreach ( $src_list as $src_info ) {
if ( ! empty( $src_info[ 'inl' ] ) ) {
continue;
}
$this->append_http2( $src_info[ 'src' ], 'js' );
}
}
}
}
// Handle js defer if not handled defer yet
if ( $this->cfg_js_defer && ! $this->cfg_js_min && ! $this->cfg_js_comb ) {
// defer html
$html_list2 = $this->_js_defer_list( $html_list, $src_list );
// Replace async js
$this->content = str_replace( $html_list, $html_list2, $this->content );
}
// Handle Inline JS defer if not combined
if ( $this->cfg_js_inline_defer && ! $this->cfg_js_comb ) {
$this->_js_inline_defer_handler( $src_list, $html_list );
}
// Append JS inline var for preserved ESI
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 ( Conf::val( Base::O_OPTM_CSS_ASYNC_INLINE ) ) {
$this->html_head .= '<script id="litespeed-css-async-lib">' . File::read( LSCWP_DIR . self::LIB_FILE_CSS_ASYNC ) . '</script>';
}
else {
$css_async_lib_url = LSWCP_PLUGIN_URL . self::LIB_FILE_CSS_ASYNC;
$this->html_head .= '<script id="litespeed-css-async-lib" src="' . $css_async_lib_url . '" ' . ( $this->cfg_js_defer ? 'defer' : '' ) . '></script>';// Don't exclude it from defer for now
$this->append_http2( $css_async_lib_url, 'js' ); // async lib will be http/2 pushed always
}
}
/**
* 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();
/**
* Localize GG/FB JS/Fonts
* @since 3.3
*/
$this->content = Localization::get_instance()->finalize( $this->content );
// Check if there is any critical css rules setting
if ( $this->cfg_css_async ) {
$this->html_head = CSS::prepend_ccss( $this->html_head );
}
// Replace html head part
$this->html_head = apply_filters( 'litespeed_optm_html_head', $this->html_head );
if ( $this->html_head ) {
// 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 ( Conf::val( Base::O_OPTM_NOSCRIPT_RM ) ) {
// $this->content = preg_replace( '#<noscript>.*</noscript>#isU', '', $this->content );
}
// HTML minify
if ( Conf::val( Base::O_OPTM_HTML_MIN ) ) {
$this->content = Optimizer::get_instance()->html_min( $this->content );
}
if ( $this->http2_headers ) {
@header( 'Link: ' . implode( ',', $this->http2_headers ), false );
}
}
/**
* 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' />
*/
$html .='<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;
}
}
$html .= '"' . implode( '","', $families ) . ( $this->_conf_css_font_display ? '&display=' . $this->_conf_css_font_display : '' ) . '"';
$html .= ']}};';
// if webfontloader lib was loaded before WebFontConfig variable, call WebFont.load
$html .= 'if ( typeof WebFont === "object" && typeof WebFont.load === "function" ) { WebFont.load( WebFontConfig ); }';
$html .= '</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
// TODO: make defer optional
$html .= '<script id="litespeed-webfont-lib" src="' . $webfont_lib_url . '" ' . ( $this->cfg_js_defer ? 'defer' : 'async' ) . '></script>';
$this->append_http2( $webfont_lib_url, 'js' ); // async lib will be http/2 pushed always
// 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=' . $this->_conf_css_font_display, $this->html_head );
$this->html_foot = str_replace( $v, $v . '&display=' . $this->_conf_css_font_display, $this->html_foot );
$this->content = str_replace( $v, $v . '&display=' . $this->_conf_css_font_display, $this->content );
}
}
/**
* Prefetch DNS
*
* @since 1.7.1
* @access private
*/
private function _dns_prefetch_init() {
// Widely enable link DNS prefetch
if ( Conf::val( Base::O_OPTM_DNS_PREFETCH_CTRL ) ) {
add_filter( 'litespeed_optm_html_head', array( $this, 'dns_prefetch_xmeta' ), 999 );
}
$this->dns_prefetch = Conf::val( Base::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' ) );
}
}
/**
* Append wide prefetch DNS meta
*
* @since 3.0
* @access public
*/
public function dns_prefetch_xmeta( $content ) {
$content .= '<meta http-equiv="x-dns-prefetch-control" content="on">';
return $content;
}
/**
* 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;
$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' ] );
}
else {
$code = Optimizer::minify_js( $src_info[ 'src' ] );
}
$snippet = str_replace( $src_info[ 'src' ], $code, $html_list[ $key ] );
}
else {
$url = $this->_build_hash_url( $src_info[ 'src' ], $file_type );
$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' ] );
}
// Add to HTTP2
$this->append_http2( $url, $file_type );
}
$snippet = str_replace( "<$tag ", '<' . $tag . ' data-optimized="1" ', $snippet );
$html_list[ $key ] = $snippet;
}
$this->content = str_replace( $html_list_ori, $html_list, $this->content );
}
/**
* Generate full URL path with hash for a list of src
*
* @since 1.2.2
* @access private
* @return string The final URL
*/
private function _build_hash_url( $src, $file_type = 'css', $url_sensitive = false ) {
// $url_sensitive = Conf::val( Base::O_OPTM_CSS_UNIQUE ) && $file_type == 'css'; // If need to keep unique CSS per URI
global $wp;
$request_url = home_url( $wp->request );
if ( ! is_array( $src ) ) {
$src = array( $src );
}
// Replace preserved ESI (before generating hash)
if ( $file_type == 'js' ) {
foreach ( $src as $k => $v ) {
if ( empty( $v[ 'inl' ] ) ) {
continue;
}
if ( ! empty( $v[ 'src' ] ) ) {
$src[ $k ][ 'src' ] = $this->_preserve_esi( $v[ 'src' ] );
}
}
}
// Query string hash
$qs_hash = substr( md5( json_encode( $src ) . self::get_option( self::ITEM_TIMESTAMP_PURGE_CSS ) ), -5 );
// Drop query strings
foreach ( $src as $k => $v ) {
if ( ! empty( $v[ 'inl' ] ) ) {
continue;
}
if ( ! empty( $v[ 'src' ] ) ) {
$src[ $k ][ 'src' ] = $this->remove_query_strings( $v[ 'src' ] ); // CSS/JS combine
}
else {
$src[ $k ] = $this->remove_query_strings( $v );
}
}
// $src = array_values( $src );
$hash = md5( json_encode( $src ) );
$filename = substr( $hash, -5 ) . '.' . $file_type;
// Need to check conflicts
// If short hash exists
$existed = false;
if ( $optm_data = $this->__data->optm_hash2src( $filename ) ) {
// If conflicts
if ( $optm_data[ 'src' ] === $src && ( ! $url_sensitive || $optm_data[ 'refer' ] === $request_url ) ) {
$existed = true;
}
else {
$filename = $hash . '.' . $file_type;
}
}
// Need to insert the record
if ( ! $existed ) {
$this->__data->optm_save_src( $filename, $src, $request_url );
}
// Generate static files
$static_file = LITESPEED_STATIC_DIR . "/cssjs/$filename";
// Check if the file is valid to bypass minify process
if ( ! file_exists( $static_file ) || time() - filemtime( $static_file ) > $this->cfg_ttl ) {
$concat_only = ! ( $file_type === 'css' ? $this->cfg_css_min : $this->cfg_js_min );
Optimizer::get_instance()->serve( $filename, $concat_only, $src, $request_url );
}
return LITESPEED_STATIC_URL . '/cssjs/' . $filename . '?' . $qs_hash;
}
/**
* Parse js src
*
* @since 1.2.2
* @access private
*/
private function _parse_js() {
$excludes = apply_filters( 'litespeed_optimize_js_excludes', Conf::val( Base::O_OPTM_JS_EXC ) );
$combine_ext_inl = Conf::val( Base::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[ '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 = $excludes ? Utility::str_hit_array( $attrs[ 'src' ], $excludes ) : false;
$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 != $match[ 0 ] ) {
$this->content = str_replace( $match[ 0 ], $deferred, $this->content );
}
}
if ( $is_internal ) {
$this->append_http2( $attrs[ 'src' ], 'js' );
}
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 ) {
if ( $is_internal ) {
$this->append_http2( $attrs[ 'src' ], 'js' );
}
continue;
}
if ( strpos( $attrs[ 'src' ], 'instant_click' ) !== false ) {
if ( $is_internal ) {
$this->append_http2( $attrs[ 'src' ], 'js' );
}
continue;
}
$this_src_arr[ 'src' ] = $attrs[ 'src' ];
}
// Inline JS
elseif ( ! empty( $match[ 2 ] ) ) {
// Debug2::debug( '🌹🌹🌹 ' . $match[2] . '🌹' );
// Exclude check
$js_excluded = $excludes ? Utility::str_hit_array( $match[ 2 ], $excludes ) : false;
if ( $js_excluded || ! $combine_ext_inl ) {
// Maybe defer
if ( $this->cfg_js_inline_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 ];
}
}
$src_list[] = $this_src_arr;
$html_list[] = $match[ 0 ];
}
return array( $src_list, $html_list );
}
/**
* Handle inline JS defer if no combined
*
* @since 3.5
*/
private function _js_inline_defer_handler( $src_list, $html_list ) {
foreach ( $src_list as $k => $src_info ) {
if ( empty( $src_info[ 'inl' ] ) ) {
continue;
}
$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 );
}
}
}
/**
* Inline JS defer
*
* @since 3.0
* @access private
*/
private function _js_inline_defer( $con, $attrs ) {
if ( strpos( $attrs, 'data-no-defer' ) !== false ) {
Debug2::debug2( '[Optm] bypass: attr api data-no-defer' );
return;
}
if ( $this->cfg_js_defer_exc ) {
$hit = Utility::str_hit_array( $con, $this->cfg_js_defer_exc );
if ( $hit ) {
Debug2::debug2( '[Optm] inline js defer excluded [setting] ' . $hit );
return;
}
}
$con = trim( $con );
// Minify JS first
$con = Optimizer::minify_js( $con );
if ( ! $con ) {
return;
}
if ( $this->cfg_js_inline_defer === 2 ) {
// Check if the content contains ESI nonce or not
$con = $this->_preserve_esi( $con );
return '<script' . $attrs . ' src="data:text/javascript;base64,' . base64_encode( $con ) . '" defer></script>';
}
else {
// Prevent var scope issue
if ( strpos( $con, 'var ' ) !== false && strpos( $con, '{' ) === false ) {
return;
}
if ( strpos( $con, 'var ' ) !== false && strpos( $con, '{' ) !== false && strpos( $con, '{' ) > strpos( $con, 'var ' ) ) {
return;
}
if ( strpos( $con, 'document.addEventListener' ) !== false ) {
return;
}
// $con = str_replace( 'var ', 'window.', $con );
return '<script' . $attrs . '>document.addEventListener("DOMContentLoaded",function(){' . $con . '});</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 = ESI::get_instance()->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', Conf::val( Base::O_OPTM_CSS_EXC ) );
$combine_ext_inl = Conf::val( Base::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 ( $excludes && $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 ( $css_to_be_removed && 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 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 fotn 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::debug2( '[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[ '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 ( ! Conf::val( Base::O_OPTM_NOSCRIPT_RM ) ) {
$v .= '<noscript>' . $ori . '</noscript>';
}
return $v;
}
/**
* Add defer to JS
*
* @since 1.3
* @access private
*/
private function _js_defer_list( $html_list, $src_list ) {
foreach ( $html_list as $k => $v ) {
if ( ! empty( $src_list[ $k ][ 'inl' ] ) ) {
continue;
}
$html_list[ $k ] = $this->_js_defer( $v, $src_list[ $k ][ 'src' ] );
}
return $html_list;
}
/**
* Defer JS snippet
*
* @since 3.5
*/
private function _js_defer( $ori, $src ) {
if ( strpos( $ori, 'async' ) !== false ) {
return $ori;
}
if ( strpos( $ori, 'defer' ) !== false ) {
return $ori;
}
if ( strpos( $ori, 'data-deferred' ) !== false ) {
Debug2::debug2( '[Optm] bypass: attr data-deferred exist' );
return $ori;
}
if ( strpos( $ori, 'data-no-defer' ) !== false ) {
Debug2::debug2( '[Optm] bypass: attr api data-no-defer' );
return $ori;
}
/**
* Exclude JS from setting
* @since 1.5
*/
if ( $this->cfg_js_defer_exc && Utility::str_hit_array( $src, $this->cfg_js_defer_exc ) ) {
Debug2::debug( '[Optm] js defer exclude ' . $src );
return $ori;
}
$v = str_replace( '></script>', ' defer data-deferred="1"></script>', $ori );
return $v;
}
/**
* Append to HTTP2 header
*
* @since 1.2.2
* @access private
*/
private function append_http2( $url, $file_type = 'css' ) {
if ( ! ( $file_type === 'css' ? $this->cfg_http2_css : $this->cfg_http2_js ) ) {
return;
}
/**
* For CDN enabled ones, bypass http/2 push
* @since 1.6.2.1
*/
if ( CDN::inc_type( $file_type ) ) {
return;
}
/**
* Keep QS for constance by set 2nd param to true
* @since 1.6.2.1
*/
$uri = Utility::url2uri( $url, true );
if ( ! $uri ) {
return;
}
$this->http2_headers[] = '<' . $uri . '>; rel=preload; as=' . ( $file_type === 'css' ? 'style' : 'script' );
}
}