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<?php |
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/** |
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* Module Name: Photon |
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* Module Description: Serve images from our servers |
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* Jumpstart Description: Mirrors and serves your images from our free and fast image CDN, improving your site’s performance with no additional load on your servers. |
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* Sort Order: 25 |
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* Recommendation Order: 1 |
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* First Introduced: 2.0 |
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* Requires Connection: Yes |
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* Auto Activate: No |
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* Module Tags: Photos and Videos, Appearance, Recommended |
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* Feature: Recommended, Jumpstart, Appearance |
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* Additional Search Queries: photon, image, cdn, performance, speed |
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*/ |
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Jetpack::dns_prefetch( array( |
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'//i0.wp.com', |
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'//i1.wp.com', |
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'//i2.wp.com', |
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'//c0.wp.com', |
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) ); |
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Jetpack_Photon::instance(); |
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class Jetpack_Photon_Static_Assets_CDN { |
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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( 'wp_footer', array( __CLASS__, 'cdnize_assets' ) ); |
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} |
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public static function cdnize_assets() { |
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global $wp_scripts, $wp_styles, $wp_version; |
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$known_core_files = self::get_core_checksums(); |
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$site_url = trailingslashit( site_url() ); |
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View Code Duplication |
foreach ( $wp_scripts->registered as $handle => $thing ) { |
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if ( wp_startswith( $thing->src, 'https://c0.wp.com/' ) ) { |
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continue; |
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} |
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$src = ltrim( str_replace( $site_url, '', $thing->src ), '/' ); |
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if ( isset( $known_core_files[ $src ] ) ) { |
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$wp_scripts->registered[ $handle ]->src = sprintf('https://c0.wp.com/c/%1$s/%2$s', $wp_version, $src ); |
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$wp_scripts->registered[ $handle ]->ver = null; |
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wp_script_add_data( $handle, 'integrity', 'md5-' . base64_encode( $known_core_files[ $src ] ) ); |
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} |
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} |
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View Code Duplication |
foreach ( $wp_styles->registered as $handle => $thing ) { |
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if ( wp_startswith( $thing->src, 'https://c0.wp.com/' ) ) { |
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continue; |
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} |
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$src = ltrim( str_replace( $site_url, '', $thing->src ), '/' ); |
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if ( isset( $known_core_files[ $src ] ) ) { |
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$wp_styles->registered[ $handle ]->src = sprintf('https://c0.wp.com/c/%1$s/%2$s', $wp_version, $src ); |
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$wp_styles->registered[ $handle ]->ver = null; |
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wp_style_add_data( $handle, 'integrity', 'md5-' . base64_encode( $known_core_files[ $src ] ) ); |
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} |
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} |
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self::cdnize_plugin_assets( 'jetpack', JETPACK__VERSION ); |
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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, $wp_styles; |
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$supported_versions = self::get_plugin_versions( $plugin_slug ); |
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if ( ! in_array( $current_version, $supported_versions ) ) { |
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return false; |
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} |
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$asset_hashes = self::get_plugin_checksums( $current_version, $plugin_slug ); |
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$plugin_directory_url = plugins_url() . '/' . $plugin_slug . '/'; |
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View Code Duplication |
foreach ( $wp_scripts->registered as $handle => $thing ) { |
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if ( wp_startswith( $thing->src, 'https://c0.wp.com/' ) ) { |
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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 ( isset( $asset_hashes[ $local_path ] ) ) { |
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$wp_scripts->registered[ $handle ]->src = sprintf('https://c0.wp.com/p/%1$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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wp_script_add_data( $handle, 'integrity', 'sha256-' . base64_encode( $asset_hashes[ $local_path ] ) ); |
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} |
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} |
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} |
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View Code Duplication |
foreach ( $wp_styles->registered as $handle => $thing ) { |
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if ( wp_startswith( $thing->src, 'https://c0.wp.com/' ) ) { |
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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 ( isset( $asset_hashes[ $local_path ] ) ) { |
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$wp_styles->registered[ $handle ]->src = sprintf('https://c0.wp.com/p/%1$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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wp_style_add_data( $handle, 'integrity', 'sha256-' . base64_encode( $asset_hashes[ $local_path ] ) ); |
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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 MD5 checksums (boo, hiss) |
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* @todo CACHING |
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* |
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* @param null $version |
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* @param null $locale |
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* @return array|bool |
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*/ |
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public static function get_core_checksums( $version = null, $locale = null ) { |
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if ( empty( $version ) ) { |
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$version = $GLOBALS['wp_version']; |
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} |
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if ( empty( $locale ) ) { |
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$locale = get_locale(); |
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} |
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require_once( ABSPATH . 'wp-admin/includes/update.php' ); |
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return get_core_checksums( $version, $locale ); |
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} |
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/** |
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* @todo CACHING |
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* |
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* @param string $plugin |
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* @return array |
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*/ |
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public static function get_plugin_versions( $plugin = 'jetpack' ) { |
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$response = wp_remote_get( sprintf( 'https://api.wordpress.org/plugins/info/1.0/%s.json', esc_url( $plugin ) ) ); |
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$body = trim( wp_remote_retrieve_body( $response ) ); |
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$body = json_decode( $body, true ); |
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return array_keys( $body['versions'] ); |
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} |
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/** |
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* Returns SHA-256 checksums |
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* @todo CACHING |
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* |
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* @param null $version |
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* @param string $plugin |
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* @return array |
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*/ |
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public static function get_plugin_checksums( $version = null, $plugin = 'jetpack' ) { |
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if ( empty( $version ) ) { |
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$version = JETPACK__VERSION; |
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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 = array(); |
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foreach ( $body['files'] as $file => $hashes ) { |
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if ( in_array( substr( $file, -3 ), array( 'css', '.js' ) ) ) { |
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$return[ $file ] = $hashes['sha256']; |
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} |
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} |
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return $return; |
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} |
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} |
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Jetpack_Photon_Static_Assets_CDN::go(); |
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Automattic /
jetpack
