Viewing file:  criticalcss.php (9.54 KB) -rw-r--r--
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<?php
/*
* SPEEDYCACHE
* https://speedycache.com/
* (c) SpeedyCache Team
*/
namespace SpeedyCache;
if(!defined('ABSPATH')){
die('Hacking Attempt');
}
class CriticalCss extends CommonCss{
static function generate($urls){
global $speedycache;
$time = time() + 50;
set_time_limit(60);
$api = self::get_endpoint();
if(empty($urls)){
self::log('speedycache_ccss_logs', 'URL not found');
return false;
}
if(empty($speedycache->license['license']) || empty($speedycache->license['active'])){
self::log('speedycache_ccss_logs', 'License Not found or inactive, please link your License');
return false;
}
$path = speedycache_cache_path('critical-css/');
$error = ''; // To hold errors when single Critical CSS is generated
$attempted_url = []; // Keeping track of URL that have been proccessed to generate CriticalCSS to handle in case of Timeout
if(!is_dir($path)){
mkdir($path);
touch($path . 'index.html');
}
$license = $speedycache->license['license'];
foreach($urls as $url){
// Handeling php timeout here
if($time < time()){
$urls = array_diff($urls, $attempted_url);
self::schedule($urls);
return;
}
$url = trim($url, '/');
$attempted_url[] = $url;
$basename = md5($url);
$file_name = $path . $basename . '.css';
$last_request = get_transient('speedycache_critical_css_time');
// Make the request wait for atleast 10 seconds
if(!empty($last_request) && (time() - $last_request) < 10){
return;
}
set_transient('speedycache_critical_css_time', time(), 90);
$response = wp_remote_post($api, array(
'timeout' => 30,
'body' => array(
'url' => $url,
'license' => $license,
),
'sslverify' => false,
));
if(is_wp_error($response)){
$error = $response->get_error_message();
self::log('speedycache_ccss_logs', $response->get_error_message(), $url);
continue;
}
$body = json_decode(wp_remote_retrieve_body($response), true);
if(empty($body)){
$error = __('The response recieved is empty.', 'speedycache');
self::log('speedycache_ccss_logs', __('The response recieved is empty.', 'speedycache'), $url);
continue;
}
if(empty($body['success'])){
$error = !empty($body['message']) ? wp_strip_all_tags($body['message']) : __('Unable to extract CriticalCss', 'speedycache');
self::log('speedycache_ccss_logs', !empty($body['message']) ? wp_strip_all_tags($body['message']) : __('Unable to extract CriticalCss', 'speedycache'), $url);
continue;
}
if(empty($body['css']) || strlen($body['css']) < 20){
$error = __('Was unable to generate Critical CSS', 'speedycache');
self::log('speedycache_ccss_logs', __('Was unable to generate Critical CSS', 'speedycache'), $url);
continue;
}
if(!is_dir($path)){
mkdir($path);
}
file_put_contents($file_name, $body['css']);
self::update_css($url, $body['css']);
self::log('speedycache_ccss_logs', 'success', $url); //Updates the log on success
if(!empty($error)){
return $error;
}
return true;
}
}
// Builds up the list to schedule URLs
static function get_url_list(){
global $blog_id;
$pages = get_pages(array('child_of' => 0, 'number' => 9));
if(empty($pages)){
return false;
}
$page_to_crawl = [];
$url = get_home_url(!empty($blog_id) ? $blog_id : null);
if(!empty($url)){
$page_to_crawl['home'] = $url;
}
foreach($pages as $p){
$page_to_crawl[$p->ID] = get_page_link($p->ID);
}
return $page_to_crawl;
}
// Adds the generated css and asynchronyses the css includes
static function update_css($url, $css){
global $speedycache;
if(empty($url)){
return false;
}
if(empty($css) && file_exists(speedycache_cache_path('critical-css/') . md5($url) . '.css')){
$css = file_get_contents(speedycache_cache_path('critical-css/') . md5($url) . '.css');
}
if(empty($css)){
return false;
}
$css = '<style id="speedycache-generated-criticalcss">'. "\n". wp_strip_all_tags($css) . '</style>';
$url = parse_url($url);
$uri = !empty($url['path']) ? $url['path'] : '';
$cache_loc = $uri . '/index.html';
if(empty($cache_loc)){
return;
}
if(!empty($_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_USER_AGENT'] === 'SpeedyCacheTest'){
$cache_path = speedycache_cache_path('test' . $cache_loc);
} else {
$cache_path = speedycache_cache_path('all' . $cache_loc);
}
$cache_path = rtrim($cache_path, '/');
// For Desktop
\SpeedyCache\CriticalCss::update_cached($cache_path, $css);
if(!empty($speedycache->options['mobile_theme']) && $_SERVER['HTTP_USER_AGENT'] !== 'SpeedyCacheTest'){
$cache_mobile = speedycache_cache_path('mobile-cache' . $cache_loc);
// For Mobile Cache
if(file_exists($cache_mobile)){
\SpeedyCache\CriticalCss::update_cached($cache_mobile, $css);
}
}
}
// Updates the content of the cached file
static function update_content($content, $css){
if(strpos($content, 'speedycache-generated-criticalcss') !== FALSE){
$content = preg_replace('/<style id="speedycache-generated-criticalcss">(.*)<\/style>/sU', $css, $content);
} else{
$content = preg_replace('#</title>#iU', "</title>\n". $css, $content);
}
$content = \SpeedyCache\CriticalCss::make_css_defer($content);
return $content;
}
/**
* This extracts the stylesheet links and convertes them to preload to make them async,
* and add the stylesheet links in noscript if js is disabled in some browsers
*/
static function make_css_defer($content){
$css_links = '/(?=<link[^>]*\s(rel\s*=\s*[\'"]stylesheet["\']))<link[^>]*\shref\s*=\s*[\'"]([^\'"]+)[\'"](.*)>/iU';
preg_match_all($css_links, $content, $matches, PREG_SET_ORDER, 0);
if(empty($matches)){
return $content;
}
$noscript_wrap = '<noscript>';
foreach($matches as $tag){
$preload = str_replace('stylesheet', 'preload', $tag[1]);
$onload = preg_replace('~' . preg_quote($tag[3], '~') . '~iU', ' as="style" onload="" ' . $tag[3] . '>', $tag[3]);
$new_tag = str_replace($tag[3] . '>', $onload, $tag[0]);
$new_tag = str_replace($tag[1], $preload, $new_tag);
$new_tag = str_replace('onload=""', 'onload="this.onload=null;this.rel=\'stylesheet\'"', $new_tag);
$new_tag = preg_replace('/(id\s*=\s*[\"\'](?:[^\"\']*)*[\"\'])/i', '', $new_tag);
$content = str_replace($tag[0], $new_tag, $content);
$noscript_wrap .= $tag[0];
}
$noscript_wrap .= '</noscript>';
$content = str_replace($noscript_wrap, '', $content);
return str_replace('</body>', $noscript_wrap . '</body>', $content);
}
static function status_modal(){
$html = '<!--SpeedyCache Critical CSS Logs Modal Starts Here-->
<div modal-id="speedycache_critical_css" class="speedycache-modal">
<div class="speedycache-modal-wrap">
<div class="speedycache-modal-header">
<div>'.esc_html__('Critical Cache Logs', 'speedycache').'</div>
<div title="Close Modal" class="speedycache-close-modal">
<span class="dashicons dashicons-no"></span>
</div>
</div>
<div class="speedycache-modal-content" style="min-height:50vh;">
<div class="speedycache-critical-css-status">';
$generate_ccss = get_option('speedycache_ccss_logs', []);
$scheduled = self::get_schedule(array('speedycache_generate_ccss'));
if(!empty($scheduled)){
$time = 'now';
if(!empty($scheduled[0]['time']) && ($scheduled[0]['time'] - time()) > 0){
$time = 'in ' . ($scheduled[0]['time'] - time()) . 's';
}
$html .= '<p style="color:rgb(1, 67, 97); background-color: rgb(229, 246, 253); padding: 10px; border-radius: 6px; font-family: monospace;">'. esc_html__('A process has been scheduled and will be executed', 'speedycache'). ' <strong>' . esc_html($time).'</strong></p>';
}
if(!is_array($generate_ccss) || count($generate_ccss) < 1){
$html .= '<span>'.esc_html__('No Logs found for CriticalCss', 'speedycache').'</span>';
} else {
$html .='<table style="margin:auto; width: 100%;">
<thead>
<tr>
<th class="speedycache-table-hitem" scope="col">'.esc_html__('Time', 'speedycache').'</th>
<th class="speedycache-table-hitem" scope="col">'. esc_html__('URLs', 'speedycache').'</th>
<th class="speedycache-table-hitem" scope="col">'. esc_html__('Status', 'speedycache').'</th>
</tr>
</thead>
<tbody>';
$generate_ccss = array_reverse($generate_ccss);
foreach($generate_ccss as $url => $status){
$parsed_url = wp_parse_url($url);
$path = !empty($parsed_url['path']) ? $parsed_url['path'] : '/';
if($status['message'] == 'success'){
$status_html = '<span class="dashicons dashicons-yes-alt" style="color: #198754;" title="Success"></span>';
} else {
$status_html = '<div class="speedycache-tt"><span class="dashicons dashicons-info" style="color:#DC3545;"></span><span class="speedycache-tt-text">'.esc_html($status['message']).'</span></div>';
}
$html .= '<tr><td class="speedycache-table-item">'.esc_html($status['time']).'</td>
<td class="speedycache-table-item">'.esc_html($path).'</td>
<td class="speedycache-table-item" style="text-align:right;">'.wp_kses_post($status_html).'</td></tr>';
}
$html .= '</tbody>
</table>';
}
$html .= '</div>
</div>
</div>
</div>';
return $html;
}
}
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