<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName

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/**

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* Module Name: Asset CDN

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* Module Description: Serve static files like CSS and JS from Jetpack’s global CDN for faster load times.

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* Sort Order: 26

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* Recommendation Order: 1

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* First Introduced: 6.6

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* Requires Connection: No

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* Auto Activate: No

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* Module Tags: Photos and Videos, Appearance, Recommended

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* Feature: Recommended, Appearance

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* Additional Search Queries: site accelerator, accelerate, static, assets, javascript, css, files, performance, cdn, bandwidth, content delivery network, pagespeed, combine js, optimize css

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*

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* @package automattic/jetpack

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*/

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use Automattic\Jetpack\Assets;

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if ( ! defined( 'ABSPATH' ) ) {

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exit( 0 );

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}

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$GLOBALS['concatenate_scripts'] = false; // phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited

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Assets::add_resource_hint( '//c0.wp.com', 'preconnect' );

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/**

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* Asset CDN module main class file.

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*/

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class Jetpack_Photon_Static_Assets_CDN {

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const CDN = 'https://c0.wp.com/';

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/**

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* Sets up action handlers needed for Jetpack CDN.

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*/

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public static function go() {

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add_action( 'wp_print_scripts', array( __CLASS__, 'cdnize_assets' ) );

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add_action( 'wp_print_styles', array( __CLASS__, 'cdnize_assets' ) );

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add_action( 'admin_print_scripts', array( __CLASS__, 'cdnize_assets' ) );

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add_action( 'admin_print_styles', array( __CLASS__, 'cdnize_assets' ) );

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add_action( 'wp_footer', array( __CLASS__, 'cdnize_assets' ) );

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add_filter( 'load_script_textdomain_relative_path', array( __CLASS__, 'fix_script_relative_path' ), 10, 2 );

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add_filter( 'load_script_translation_file', array( __CLASS__, 'fix_local_script_translation_path' ), 10, 3 );

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}

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/**

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* Sets up CDN URLs for assets that are enqueued by the WordPress Core.

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*/

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public static function cdnize_assets() {

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global $wp_scripts, $wp_styles, $wp_version;

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/*

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* Short-circuit if AMP since not relevant as custom JS is not allowed and CSS is inlined.

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* Note that it is not suitable to use the jetpack_force_disable_site_accelerator filter for this

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* because it will be applied before the wp action, which is the point at which the queried object

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* is available and we know whether the response will be AMP or not. This is particularly important

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* for AMP-first (native AMP) pages where there are no AMP-specific URLs.

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*/

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if ( class_exists( Jetpack_AMP_Support::class ) && Jetpack_AMP_Support::is_amp_request() ) {

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return;

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}

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/**

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* Filters Jetpack CDN's Core version number and locale. Can be used to override the values

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* that Jetpack uses to retrieve assets. Expects the values to be returned in an array.

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*

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* @module photon-cdn

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*

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* @since 6.6.0

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*

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* @param array $values array( $version = core assets version, i.e. 4.9.8, $locale = desired locale )

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*/

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list( $version, $locale ) = apply_filters( // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable

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'jetpack_cdn_core_version_and_locale',

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array( $wp_version, get_locale() )

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);

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if ( self::is_public_version( $version ) ) {

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$site_url = trailingslashit( site_url() );

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if ( $wp_scripts instanceof WP_Scripts && is_array( $wp_scripts->registered ) ) {

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foreach ( $wp_scripts->registered as $handle => $thing ) {

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if ( wp_startswith( $thing->src, self::CDN ) ) {

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continue;

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}

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if ( ! is_string( $thing->src ) ) {

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continue;

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}

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$src = ltrim( str_replace( $site_url, '', $thing->src ), '/' );

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if ( self::is_js_or_css_file( $src ) && in_array( substr( $src, 0, 9 ), array( 'wp-admin/', 'wp-includ' ), true ) ) {

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$wp_scripts->registered[ $handle ]->src = sprintf( self::CDN . 'c/%1$s/%2$s', $version, $src );

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$wp_scripts->registered[ $handle ]->ver = null;

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}

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}

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}

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if ( $wp_styles instanceof WP_Styles && is_array( $wp_styles->registered ) ) {

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foreach ( $wp_styles->registered as $handle => $thing ) {

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if ( wp_startswith( $thing->src, self::CDN ) ) {

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continue;

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}

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if ( ! is_string( $thing->src ) ) {

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continue;

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}

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$src = ltrim( str_replace( $site_url, '', $thing->src ), '/' );

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if ( self::is_js_or_css_file( $src ) && in_array( substr( $src, 0, 9 ), array( 'wp-admin/', 'wp-includ' ), true ) ) {

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$wp_styles->registered[ $handle ]->src = sprintf( self::CDN . 'c/%1$s/%2$s', $version, $src );

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$wp_styles->registered[ $handle ]->ver = null;

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}

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}

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}

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}

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self::cdnize_plugin_assets( 'jetpack', JETPACK__VERSION );

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if ( class_exists( 'WooCommerce' ) ) {

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self::cdnize_plugin_assets( 'woocommerce', WC_VERSION );

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}

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}

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/**

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* Ensure use of the correct relative path when determining the JavaScript file names.

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*

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* @param string $relative The relative path of the script. False if it could not be determined.

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* @param string $src The full source url of the script.

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* @return string The expected relative path for the CDN-ed URL.

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*/

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public static function fix_script_relative_path( $relative, $src ) {

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// Note relevant in AMP responses. See note above.

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if ( class_exists( Jetpack_AMP_Support::class ) && Jetpack_AMP_Support::is_amp_request() ) {

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return $relative;

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}

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$strpos = strpos( $src, '/wp-includes/' );

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// We only treat URLs that have wp-includes in them. Cases like language textdomains

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// can also use this filter, they don't need to be touched because they are local paths.

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if ( false !== $strpos ) {

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return substr( $src, 1 + $strpos );

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}

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// Get the local path from a URL which was CDN'ed by cdnize_plugin_assets().

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if ( preg_match( '#^' . preg_quote( self::CDN, '#' ) . 'p/[^/]+/[^/]+/(.*)$#', $src, $m ) ) {

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return $m[1];

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}

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return $relative;

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}

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/**

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* Ensure use of the correct local path when loading the JavaScript translation file for a CDN'ed asset.

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*

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* @param string|false $file Path to the translation file to load. False if there isn't one.

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* @param string $handle The script handle.

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* @param string $domain The text domain.

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*

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* @return string The transformed local languages path.

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*/

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public static function fix_local_script_translation_path( $file, $handle, $domain ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable

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global $wp_scripts;

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// This is a rewritten plugin URL, so load the language file from the plugins path.

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if ( $file && isset( $wp_scripts->registered[ $handle ] ) && wp_startswith( $wp_scripts->registered[ $handle ]->src, self::CDN . 'p' ) ) {

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return WP_LANG_DIR . '/plugins/' . basename( $file );

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}

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return $file;

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}

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/**

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* Sets up CDN URLs for supported plugin assets.

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*

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* @param String $plugin_slug plugin slug string.

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* @param String $current_version plugin version string.

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* @return null|bool

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*/

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public static function cdnize_plugin_assets( $plugin_slug, $current_version ) {

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global $wp_scripts, $wp_styles;

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/**

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* Filters Jetpack CDN's plugin slug and version number. Can be used to override the values

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* that Jetpack uses to retrieve assets. For example, when testing a development version of Jetpack

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* the assets are not yet published, so you may need to override the version value to either

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* trunk, or the latest available version. Expects the values to be returned in an array.

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*

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* @module photon-cdn

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*

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* @since 6.6.0

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*

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* @param array $values array( $slug = the plugin repository slug, i.e. jetpack, $version = the plugin version, i.e. 6.6 )

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*/

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list( $plugin_slug, $current_version ) = apply_filters(

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'jetpack_cdn_plugin_slug_and_version',

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array( $plugin_slug, $current_version )

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);

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$assets = self::get_plugin_assets( $plugin_slug, $current_version );

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$plugin_directory_url = plugins_url() . '/' . $plugin_slug . '/';

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if ( is_wp_error( $assets ) || ! is_array( $assets ) ) {

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return false;

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}

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if ( $wp_scripts instanceof WP_Scripts && is_array( $wp_scripts->registered ) ) {

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foreach ( $wp_scripts->registered as $handle => $thing ) {

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if ( wp_startswith( $thing->src, self::CDN ) ) {

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continue;

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}

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if ( wp_startswith( $thing->src, $plugin_directory_url ) ) {

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$local_path = substr( $thing->src, strlen( $plugin_directory_url ) );

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if ( in_array( $local_path, $assets, true ) ) {

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$wp_scripts->registered[ $handle ]->src = sprintf( self::CDN . 'p/%1$s/%2$s/%3$s', $plugin_slug, $current_version, $local_path );

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$wp_scripts->registered[ $handle ]->ver = null;

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}

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}

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}

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}

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if ( $wp_styles instanceof WP_Styles && is_array( $wp_styles->registered ) ) {

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foreach ( $wp_styles->registered as $handle => $thing ) {

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if ( wp_startswith( $thing->src, self::CDN ) ) {

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continue;

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}

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if ( wp_startswith( $thing->src, $plugin_directory_url ) ) {

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$local_path = substr( $thing->src, strlen( $plugin_directory_url ) );

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if ( in_array( $local_path, $assets, true ) ) {

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$wp_styles->registered[ $handle ]->src = sprintf( self::CDN . 'p/%1$s/%2$s/%3$s', $plugin_slug, $current_version, $local_path );

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$wp_styles->registered[ $handle ]->ver = null;

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}

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}

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}

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}

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}

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/**

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* Returns cdn-able assets for a given plugin.

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*

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* @param string $plugin plugin slug string.

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* @param string $version plugin version number string.

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* @return array|bool Will return false if not a public version.

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*/

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public static function get_plugin_assets( $plugin, $version ) {

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if ( 'jetpack' === $plugin && JETPACK__VERSION === $version ) {

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if ( ! self::is_public_version( $version ) || ! file_exists( JETPACK__PLUGIN_DIR . 'modules/photon-cdn/jetpack-manifest.php' ) ) {

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return false;

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}

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$assets = array(); // The variable will be redefined in the included file.

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include JETPACK__PLUGIN_DIR . 'modules/photon-cdn/jetpack-manifest.php';

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return $assets;

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}

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/**

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* Used for other plugins to provide their bundled assets via filter to

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* prevent the need of storing them in an option or an external api request

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* to w.org.

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*

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* @module photon-cdn

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*

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* @since 6.6.0

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*

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* @param array $assets The assets array for the plugin.

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* @param string $version The version of the plugin being requested.

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*/

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$assets = apply_filters( "jetpack_cdn_plugin_assets-{$plugin}", null, $version ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores

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if ( is_array( $assets ) ) {

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return $assets;

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}

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if ( ! self::is_public_version( $version ) ) {

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return false;

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}

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$cache = Jetpack_Options::get_option( 'static_asset_cdn_files', array() );

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if ( isset( $cache[ $plugin ][ $version ] ) ) {

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if ( is_array( $cache[ $plugin ][ $version ] ) ) {

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return $cache[ $plugin ][ $version ];

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}

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if ( is_numeric( $cache[ $plugin ][ $version ] ) ) {

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// Cache an empty result for up to 24h.

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if ( (int) $cache[ $plugin ][ $version ] + DAY_IN_SECONDS > time() ) {

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return array();

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}

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}

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}

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$url = sprintf( 'http://downloads.wordpress.org/plugin-checksums/%s/%s.json', $plugin, $version );

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if ( wp_http_supports( array( 'ssl' ) ) ) {

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$url = set_url_scheme( $url, 'https' );

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}

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$response = wp_remote_get( $url );

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$body = trim( wp_remote_retrieve_body( $response ) );

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$body = json_decode( $body, true );

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$return = time();

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if ( is_array( $body ) ) {

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$return = array_filter( array_keys( $body['files'] ), array( __CLASS__, 'is_js_or_css_file' ) );

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}

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$cache[ $plugin ] = array();

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$cache[ $plugin ][ $version ] = $return;

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Jetpack_Options::update_option( 'static_asset_cdn_files', $cache, true );

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return $return;

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}

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/**

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* Checks a path whether it is a JS or CSS file.

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*

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* @param String $path file path.

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* @return Boolean whether the file is a JS or CSS.

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*/

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public static function is_js_or_css_file( $path ) {

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return ( ! str_contains( $path, '?' ) ) && in_array( substr( $path, -3 ), array( 'css', '.js' ), true );

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}

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/**

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* Checks whether the version string indicates a production version.

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*

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* @param String $version the version string.

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* @param Boolean $include_beta_and_rc whether to count beta and RC versions as production.

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* @return Boolean

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*/

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public static function is_public_version( $version, $include_beta_and_rc = false ) {

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if ( preg_match( '/^\d+(\.\d+)+$/', $version ) ) {

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/** Example matches: `1`, `1.2`, `1.2.3`. */

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return true;

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} elseif ( $include_beta_and_rc && preg_match( '/^\d+(\.\d+)+(-(beta|rc|pressable)\d?)$/i', $version ) ) {

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/** Example matches: `1.2.3`, `1.2.3-beta`, `1.2.3-pressable`, `1.2.3-beta1`, `1.2.3-rc`, `1.2.3-rc2`. */

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return true;

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}

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// Unrecognized version.

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return false;

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}

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}

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/**

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* Allow plugins to short-circuit the Asset CDN, even when the module is on.

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*

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* @module photon-cdn

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*

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* @since 6.7.0

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*

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* @param false bool Should the Asset CDN be blocked? False by default.

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*/

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if ( true !== apply_filters( 'jetpack_force_disable_site_accelerator', false ) ) {

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Jetpack_Photon_Static_Assets_CDN::go();

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}

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