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<?php |
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/** |
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* Module Name: Asset CDN |
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* Module Description: Serve static assets from our servers |
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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: photon, image, cdn, performance, speed, assets |
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*/ |
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|
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$GLOBALS['concatenate_scripts'] = false; |
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|
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Jetpack::dns_prefetch( array( |
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'//c0.wp.com', |
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) ); |
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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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/** |
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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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} |
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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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/** |
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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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* @since 6.6 |
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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( |
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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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|
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if ( self::is_public_version( $version ) ) { |
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$site_url = trailingslashit( site_url() ); |
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foreach ( $wp_scripts->registered as $handle => $thing ) { |
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if ( wp_startswith( $thing->src, self::CDN ) ) { |
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continue; |
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} |
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$src = ltrim( str_replace( $site_url, '', $thing->src ), '/' ); |
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if ( self::is_js_or_css_file( $src ) && in_array( substr( $src, 0, 9 ), array( 'wp-admin/', 'wp-includ' ) ) ) { |
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$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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foreach ( $wp_styles->registered as $handle => $thing ) { |
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if ( wp_startswith( $thing->src, self::CDN ) ) { |
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continue; |
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} |
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$src = ltrim( str_replace( $site_url, '', $thing->src ), '/' ); |
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if ( self::is_js_or_css_file( $src ) && in_array( substr( $src, 0, 9 ), array( 'wp-admin/', 'wp-includ' ) ) ) { |
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$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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/** |
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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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/** |
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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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* @since 6.6 |
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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, $current_version ) |
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); |
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|
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$assets = self::get_plugin_assets( $plugin_slug, $current_version ); |
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$plugin_directory_url = plugins_url() . '/' . $plugin_slug . '/'; |
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|
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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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|
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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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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 |
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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 === $version ) { |
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$assets = array(); // The variable will be redefined in the included file. |
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|
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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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/** |
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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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* @since 6.6 |
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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 ); |
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if ( is_array( $assets ) ) { |
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return $assets; |
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} |
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|
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if ( ! self::is_public_version( $version ) ) { |
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return false; |
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} |
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|
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$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 ( intval( $cache[ $plugin ][ $version ] ) + DAY_IN_SECONDS > time() ) { |
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return array(); |
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} |
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} |
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} |
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|
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$url = sprintf( 'http://downloads.wordpress.org/plugin-checksums/%s/%s.json', $plugin, $version ); |
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|
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if ( wp_http_supports( array( 'ssl' ) ) ) { |
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$url = set_url_scheme( $url, 'https' ); |
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} |
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|
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$response = wp_remote_get( $url ); |
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|
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$body = trim( wp_remote_retrieve_body( $response ) ); |
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$body = json_decode( $body, true ); |
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|
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$return = time(); |
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if ( is_array( $body ) ) { |
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$return = array_filter( array_keys( $body['files'] ), array( __CLASS__, 'is_js_or_css_file' ) ); |
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} |
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|
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$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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|
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return $return; |
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} |
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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 ( false === strpos( $path, '?' ) ) && in_array( substr( $path, -3 ), array( 'css', '.js' ), true ); |
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} |
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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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// matches `1` `1.2` `1.2.3`. |
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return true; |
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} elseif ( $include_beta_and_rc && preg_match( '/^\d+(\.\d+)+(-(beta|rc)\d?)$/i', $version ) ) { |
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// matches `1.2.3` `1.2.3-beta` `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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Jetpack_Photon_Static_Assets_CDN::go(); |
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|
