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<?php
namespace SpeedyCache;
if(!defined('ABSPATH')){
die('HACKING ATTEMPT!');
}
class CDN{
static $allowed_types = [];
static $cdn_url = '';
static $specific = [];
static $excludes = [];
static function rewrite(&$content){
global $speedycache;
self::$cdn_url = $speedycache->cdn['cdn_url'];
self::$allowed_types = $speedycache->cdn['file_types'];
self::$excludes = $speedycache->cdn['excludekeywords'];
self::$specific = $speedycache->cdn['keywords'];
if(empty(self::$cdn_url) || empty(self::$allowed_types)){
return;
}
// Define the patterns to match specific URLs (e.g., images, CSS, JS)
$patterns = [
'/'. preg_quote(home_url('/wp-content/uploads/'), '/') . '([^"\']+)/i', // Uploads directory
'/'. preg_quote(home_url('/wp-includes/'), '/') . '([^"\']+)/i', // WordPress core assets
'/'. preg_quote(home_url('/wp-content/themes/'), '/') . '([^"\']+)/i', // Theme assets
'/'. preg_quote(home_url('/wp-content/plugins/'), '/') . '([^"\']+)/i', // Plugin assets
'/'. preg_quote(home_url('/wp-content/cache/'), '/') . '([^"\']+)/i', // Cache files
];
// Loop through each pattern and replace only URLs with the specified file types
foreach($patterns as $pattern){
$content = preg_replace_callback($pattern, '\SpeedyCache\CDN::replace_urls', $content);
}
}
static function replace_urls($matches) {
global $speedycache;
// Get the file extension
$file_url = preg_replace('/\?.*$/', '', $matches[0]);
if(empty($file_url)){
$file_url = $matches[0];
}
$file_url = trim($file_url, '/');
if(self::is_excluded($file_url)){
return $matches[0];
}
// To rewrite just some specific files only
if(!empty(self::$specific) && is_array(self::$specific)){
$is_specific = false;
foreach(self::$specific as $required_source){
if(preg_match('/'.preg_quote($required_source).'/i', $file_url)){
$is_specific = true;
break;
}
}
if(empty($is_specific)){
return $matches[0];
}
}
$file_extension = pathinfo($file_url, PATHINFO_EXTENSION);
// Check if the file extension is in the allowed list
if(in_array(strtolower($file_extension), self::$allowed_types)){
$home_url = home_url();
// Rewrite the URL to use the CDN
return str_replace($home_url, self::$cdn_url, $matches[0]);
}
// If not in the allowed list, return the original URL
return $matches[0];
}
static function is_excluded($url){
if(empty($url)){
return false;
}
// array check if just to make sure things dont break for 1.2.0 in which we rewrote the plugin
if(empty(self::$excludes) || !is_array(self::$excludes)){
return false;
}
foreach(self::$excludes as $exclude){
if(preg_match('/'.preg_quote($exclude).'/i', $url)){
return true;
}
}
return false;
}
static function purge(){
global $speedycache;
// Only cloudflare and Bunny can be purged, that too we only want that to happen if CDN is enabled.
if(
empty($speedycache->cdn['enabled']) ||
empty($speedycache->cdn['cdn_key']) ||
empty($speedycache->cdn['cdn_type']) ||
$speedycache->cdn['cdn_type'] == 'other'
){
return;
}
if($speedycache->cdn['cdn_type'] == 'bunny'){
self::purge_bunny($speedycache->cdn);
}elseif($speedycache->cdn['cdn_type'] == 'cloudflare'){
self::purge_cloudflare($speedycache->cdn);
}
}
// Get unique pull ID to purge cache on CDN
static function bunny_get_pull_id(&$cdn){
global $speedycache;
$pull_zone = $cdn['cdn_url']; // bunny cdn calls it cdn url as pull zone
$access_key = $cdn['cdn_key'];
if(empty($access_key)){
return array('success' => false, 'message' => __('Bunny CDN Access Key not found', 'speedycache'));
}
$options = array(
'headers' => array(
'AccessKey' => $access_key,
'accept' => 'application/json'
)
);
$res = wp_remote_get('https://api.bunny.net/pullzone', $options);
if(is_wp_error($res) || empty($res)){
if(empty($res)){
return array('success' => false, 'message' => __('Bunny CDN retuned an empty response', 'speedycache'));
}
return array('success' => false, 'message' => 'Something Went Wrong: ' . $res->get_error_message());
}
$res_code = wp_remote_retrieve_response_code($res);
if(substr($res_code, 0, 1) != 2){
return array('success' => false, 'message' => __('Something Went Wrong: Getting Pull ID was unsuccessful ', 'speedycache') . $res_code);
}
$res_body = wp_remote_retrieve_body($res);
if(empty($res_body)){
return array('success' => false, 'message' => __('Bunny CDN pull ID response body is empty', 'speedycache'));
}
$res_body = json_decode($res_body, true);
foreach($res_body as $pull_zones){
if($pull_zones['OriginUrl'] == $cdn['origin_url']){
return $pull_zones['Id'];
}
}
return array('success' => false, 'message' => __('Bunny Pull Zone not found', 'speedycache'));
}
static function purge_bunny($cdn){
if(empty($cdn['cdn_key']) || empty($cdn['cdn_url'])){
return false;
}
$pull_zone = $cdn['cdn_url']; // bunny cdn calls it cdn url as pull zone
$access_key = $cdn['cdn_key'];
$pull_id = !empty($cdn['bunny_pull_id']) ? $cdn['bunny_pull_id'] : '';
if(empty($access_key) || empty($pull_id)){
return false;
}
$options = array(
'headers' => array(
'AccessKey' => $access_key,
'content-type' => 'application/json'
)
);
$res = wp_remote_post('https://api.bunny.net/pullzone/'.$pull_id.'/purgeCache', $options);
if(is_wp_error($res) || empty($res)){
if(empty($res)){
return __('Bunny CDN retuned an empty response', 'speedycache');
}
return 'Something Went Wrong: ' . $res->get_error_message();
}
$res_code = wp_remote_retrieve_response_code($res);
if($res_code != 204){
return esc_html__('Something Went Wrong: Purge was unsuccessful with response code of ') . $res_code;
}
return esc_html__('Success: Bunny CDN purged successfully', 'speedycache');
}
static function cloudflare_zone_id(&$cdn){
if(empty($cdn['cdn_key'])){
return false;
}
$api_token = $cdn['cdn_key'];
$domain = parse_url(home_url(), PHP_URL_HOST);
$url = 'https://api.cloudflare.com/client/v4/zones?name='.$domain;
$args = [
'headers' => [
'Authorization' => 'Bearer ' . $api_token,
'Content-Type' => 'application/json',
],
];
$response = wp_remote_get($url, $args);
if (is_wp_error($response)) {
return 'Error: ' . $response->get_error_message();
}
$body = json_decode(wp_remote_retrieve_body($response), true);
if($body && isset($body['result'][0]['id'])){
return $body['result'][0]['id']; // This is the Zone ID
}
return false;
}
static function purge_cloudflare($cdn){
if(empty($cdn['cloudflare_zone_id']) || empty($cdn['cdn_key'])){
return;
}
$zone_id = $cdn['cloudflare_zone_id'];
$api_token = $cdn['cdn_key'];
$url = 'https://api.cloudflare.com/client/v4/zones/'.$zone_id.'/purge_cache';
$args = [
'headers' => [
'Authorization' => 'Bearer ' . $api_token,
'Content-Type' => 'application/json',
],
'body' => json_encode([
'purge_everything' => true, // Set to true to purge all cache
]),
];
$response = wp_remote_post($url, $args);
if (is_wp_error($response)) {
return 'Error: ' . $response->get_error_message();
}
$body = json_decode(wp_remote_retrieve_body($response), true);
if ($body && isset($body['success']) && $body['success'] === true) {
return esc_html__('Cloudflare cache purged successfully.', 'speedycache');
}
return 'Failed to purge Cloudflare cache. ' . $body['errors'][0]['message'] ?? '';
}
}