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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_delay_inc = array();
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 $dns_preconnect;
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));
$this->cfg_js_delay_inc = apply_filters('litespeed_optm_js_delay_inc', $this->conf(self::O_OPTM_JS_DELAY_INC));
}
}
/**
* Add vary filter for Role Excludes
* @since 1.6
*/
add_filter('litespeed_vary', array($this, 'vary_add_role_exclude'));
/**
* Prefetch DNS
* @since 1.7.1
*/
$this->_dns_prefetch_init();
/**
* Preconnect
* @since 5.6.1
*/
$this->_dns_preconnect_init();
add_filter('litespeed_buffer_finalize', array($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');
$this->cfg_css_async = false;
} elseif (strpos($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 || $this->cfg_js_delay_inc) {
add_filter('litespeed_optimize_js_excludes', array($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, $this->content);
}
} elseif ($this->cfg_js_delay_inc) {
$deferred = $this->_js_delay($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 || Utility::str_hit_array($src, $this->cfg_js_delay_inc)) {
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 && !$this->cfg_js_delay_inc) {
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'));
}
}
/**
* Preconnect init
*
* @since 5.6.1
*/
private function _dns_preconnect_init()
{
$this->dns_preconnect = $this->conf(self::O_OPTM_DNS_PRECONNECT);
if ($this->dns_preconnect) {
add_action('litespeed_optm', array($this, 'dns_preconnect_output'));
}
}
/**
* Prefetch DNS hook for WP
*
* @since 1.7.1
* @access public
*/
public function dns_prefetch_filter($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="' . $v . '" />';
}
}
}
/**
* Preconnect
*
* @since 5.6.1
* @access public
*/
public function dns_preconnect_output()
{
foreach ($this->dns_preconnect as $v) {
if ($v) {
$this->html_head .= '<link rel="preconnect" 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);
if (!apply_filters('litespeed_optm_js_comb_ext_inl', true)) {
Debug2::debug2('[Optm] js_comb_ext_inl bypassed via litespeed_optm_js_comb_ext_inl filter');
$combine_ext_inl = false;
}
$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);
if (!apply_filters('litespeed_optm_css_comb_ext_inl', true)) {
Debug2::debug2('[Optm] css_comb_ext_inl bypassed via litespeed_optm_css_comb_ext_inl filter');
$combine_ext_inl = false;
}
$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 = preg_replace('# async(?:=([\'"])(?:[^\1]+)\1)?#isU', '', $ori);
}
if (strpos($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 || Utility::str_hit_array($src, $this->cfg_js_delay_inc)) {
if (strpos($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>', $ori);
}
/**
* Delay JS for included setting
*
* @since 5.6
*/
private function _js_delay($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;
}
if (!Utility::str_hit_array($src, $this->cfg_js_delay_inc)) {
return;
}
if (strpos($ori, ' type=') !== false) {
$ori = preg_replace('# type=([\'"])([^\1]+)\1#isU', '', $ori);
}
return str_replace(' src=', ' type="litespeed/javascript" data-src=', $ori);
}
}