photon-cdn.php
| 1 | <?php |
| 2 | /** |
| 3 | * Module Name: Asset CDN |
| 4 | * Module Description: Jetpack’s Site Accelerator loads your site faster by optimizing your images and serving your images and static files from our global network of servers. |
| 5 | * Sort Order: 26 |
| 6 | * Recommendation Order: 1 |
| 7 | * First Introduced: 6.6 |
| 8 | * Requires Connection: No |
| 9 | * Auto Activate: No |
| 10 | * Module Tags: Photos and Videos, Appearance, Recommended |
| 11 | * Feature: Recommended, Appearance |
| 12 | * Additional Search Queries: site accelerator, accelerate, static, assets, javascript, css, files, performance, cdn, bandwidth, content delivery network, pagespeed, combine js, optimize css |
| 13 | */ |
| 14 | |
| 15 | use Automattic\Jetpack\Assets; |
| 16 | |
| 17 | $GLOBALS['concatenate_scripts'] = false; |
| 18 | |
| 19 | Assets::add_resource_hint( '//c0.wp.com', 'dns-prefetch' ); |
| 20 | |
| 21 | class Jetpack_Photon_Static_Assets_CDN { |
| 22 | const CDN = 'https://c0.wp.com/'; |
| 23 | |
| 24 | /** |
| 25 | * Sets up action handlers needed for Jetpack CDN. |
| 26 | */ |
| 27 | public static function go() { |
| 28 | add_action( 'wp_print_scripts', array( __CLASS__, 'cdnize_assets' ) ); |
| 29 | add_action( 'wp_print_styles', array( __CLASS__, 'cdnize_assets' ) ); |
| 30 | add_action( 'admin_print_scripts', array( __CLASS__, 'cdnize_assets' ) ); |
| 31 | add_action( 'admin_print_styles', array( __CLASS__, 'cdnize_assets' ) ); |
| 32 | add_action( 'wp_footer', array( __CLASS__, 'cdnize_assets' ) ); |
| 33 | add_filter( 'load_script_textdomain_relative_path', array( __CLASS__, 'fix_script_relative_path' ), 10, 2 ); |
| 34 | add_filter( 'load_script_translation_file', array( __CLASS__, 'fix_local_script_translation_path' ), 10, 3 ); |
| 35 | } |
| 36 | |
| 37 | /** |
| 38 | * Sets up CDN URLs for assets that are enqueued by the WordPress Core. |
| 39 | */ |
| 40 | public static function cdnize_assets() { |
| 41 | global $wp_scripts, $wp_styles, $wp_version; |
| 42 | |
| 43 | /* |
| 44 | * Short-circuit if AMP since not relevant as custom JS is not allowed and CSS is inlined. |
| 45 | * Note that it is not suitable to use the jetpack_force_disable_site_accelerator filter for this |
| 46 | * because it will be applied before the wp action, which is the point at which the queried object |
| 47 | * is available and we know whether the response will be AMP or not. This is particularly important |
| 48 | * for AMP-first (native AMP) pages where there are no AMP-specific URLs. |
| 49 | */ |
| 50 | if ( Jetpack_AMP_Support::is_amp_request() ) { |
| 51 | return; |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Filters Jetpack CDN's Core version number and locale. Can be used to override the values |
| 56 | * that Jetpack uses to retrieve assets. Expects the values to be returned in an array. |
| 57 | * |
| 58 | * @module photon-cdn |
| 59 | * |
| 60 | * @since 6.6.0 |
| 61 | * |
| 62 | * @param array $values array( $version = core assets version, i.e. 4.9.8, $locale = desired locale ) |
| 63 | */ |
| 64 | list( $version, $locale ) = apply_filters( |
| 65 | 'jetpack_cdn_core_version_and_locale', |
| 66 | array( $wp_version, get_locale() ) |
| 67 | ); |
| 68 | |
| 69 | if ( self::is_public_version( $version ) ) { |
| 70 | $site_url = trailingslashit( site_url() ); |
| 71 | foreach ( $wp_scripts->registered as $handle => $thing ) { |
| 72 | if ( wp_startswith( $thing->src, self::CDN ) ) { |
| 73 | continue; |
| 74 | } |
| 75 | $src = ltrim( str_replace( $site_url, '', $thing->src ), '/' ); |
| 76 | if ( self::is_js_or_css_file( $src ) && in_array( substr( $src, 0, 9 ), array( 'wp-admin/', 'wp-includ' ) ) ) { |
| 77 | $wp_scripts->registered[ $handle ]->src = sprintf( self::CDN . 'c/%1$s/%2$s', $version, $src ); |
| 78 | $wp_scripts->registered[ $handle ]->ver = null; |
| 79 | } |
| 80 | } |
| 81 | foreach ( $wp_styles->registered as $handle => $thing ) { |
| 82 | if ( wp_startswith( $thing->src, self::CDN ) ) { |
| 83 | continue; |
| 84 | } |
| 85 | $src = ltrim( str_replace( $site_url, '', $thing->src ), '/' ); |
| 86 | if ( self::is_js_or_css_file( $src ) && in_array( substr( $src, 0, 9 ), array( 'wp-admin/', 'wp-includ' ) ) ) { |
| 87 | $wp_styles->registered[ $handle ]->src = sprintf( self::CDN . 'c/%1$s/%2$s', $version, $src ); |
| 88 | $wp_styles->registered[ $handle ]->ver = null; |
| 89 | } |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | self::cdnize_plugin_assets( 'jetpack', JETPACK__VERSION ); |
| 94 | if ( class_exists( 'WooCommerce' ) ) { |
| 95 | self::cdnize_plugin_assets( 'woocommerce', WC_VERSION ); |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Ensure use of the correct relative path when determining the JavaScript file names. |
| 101 | * |
| 102 | * @param string $relative The relative path of the script. False if it could not be determined. |
| 103 | * @param string $src The full source url of the script. |
| 104 | * @return string The expected relative path for the CDN-ed URL. |
| 105 | */ |
| 106 | public static function fix_script_relative_path( $relative, $src ) { |
| 107 | |
| 108 | // Note relevant in AMP responses. See note above. |
| 109 | if ( Jetpack_AMP_Support::is_amp_request() ) { |
| 110 | return $relative; |
| 111 | } |
| 112 | |
| 113 | $strpos = strpos( $src, '/wp-includes/' ); |
| 114 | |
| 115 | // We only treat URLs that have wp-includes in them. Cases like language textdomains |
| 116 | // can also use this filter, they don't need to be touched because they are local paths. |
| 117 | if ( false !== $strpos ) { |
| 118 | return substr( $src, 1 + $strpos ); |
| 119 | } |
| 120 | |
| 121 | // Get the local path from a URL which was CDN'ed by cdnize_plugin_assets(). |
| 122 | if ( preg_match( '#^' . preg_quote( self::CDN, '#' ) . 'p/[^/]+/[^/]+/(.*)$#', $src, $m ) ) { |
| 123 | return $m[1]; |
| 124 | } |
| 125 | |
| 126 | return $relative; |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Ensure use of the correct local path when loading the JavaScript translation file for a CDN'ed asset. |
| 131 | * |
| 132 | * @param string|false $file Path to the translation file to load. False if there isn't one. |
| 133 | * @param string $handle The script handle. |
| 134 | * @param string $domain The text domain. |
| 135 | * |
| 136 | * @return string The transformed local languages path. |
| 137 | */ |
| 138 | public static function fix_local_script_translation_path( $file, $handle, $domain ) { |
| 139 | global $wp_scripts; |
| 140 | |
| 141 | // This is a rewritten plugin URL, so load the language file from the plugins path. |
| 142 | if ( $file && isset( $wp_scripts->registered[ $handle ] ) && wp_startswith( $wp_scripts->registered[ $handle ]->src, self::CDN . 'p' ) ) { |
| 143 | return WP_LANG_DIR . '/plugins/' . basename( $file ); |
| 144 | } |
| 145 | |
| 146 | return $file; |
| 147 | } |
| 148 | |
| 149 | /** |
| 150 | * Sets up CDN URLs for supported plugin assets. |
| 151 | * |
| 152 | * @param String $plugin_slug plugin slug string. |
| 153 | * @param String $current_version plugin version string. |
| 154 | * @return null|bool |
| 155 | */ |
| 156 | public static function cdnize_plugin_assets( $plugin_slug, $current_version ) { |
| 157 | global $wp_scripts, $wp_styles; |
| 158 | |
| 159 | /** |
| 160 | * Filters Jetpack CDN's plugin slug and version number. Can be used to override the values |
| 161 | * that Jetpack uses to retrieve assets. For example, when testing a development version of Jetpack |
| 162 | * the assets are not yet published, so you may need to override the version value to either |
| 163 | * trunk, or the latest available version. Expects the values to be returned in an array. |
| 164 | * |
| 165 | * @module photon-cdn |
| 166 | * |
| 167 | * @since 6.6.0 |
| 168 | * |
| 169 | * @param array $values array( $slug = the plugin repository slug, i.e. jetpack, $version = the plugin version, i.e. 6.6 ) |
| 170 | */ |
| 171 | list( $plugin_slug, $current_version ) = apply_filters( |
| 172 | 'jetpack_cdn_plugin_slug_and_version', |
| 173 | array( $plugin_slug, $current_version ) |
| 174 | ); |
| 175 | |
| 176 | $assets = self::get_plugin_assets( $plugin_slug, $current_version ); |
| 177 | $plugin_directory_url = plugins_url() . '/' . $plugin_slug . '/'; |
| 178 | |
| 179 | if ( is_wp_error( $assets ) || ! is_array( $assets ) ) { |
| 180 | return false; |
| 181 | } |
| 182 | |
| 183 | foreach ( $wp_scripts->registered as $handle => $thing ) { |
| 184 | if ( wp_startswith( $thing->src, self::CDN ) ) { |
| 185 | continue; |
| 186 | } |
| 187 | if ( wp_startswith( $thing->src, $plugin_directory_url ) ) { |
| 188 | $local_path = substr( $thing->src, strlen( $plugin_directory_url ) ); |
| 189 | if ( in_array( $local_path, $assets, true ) ) { |
| 190 | $wp_scripts->registered[ $handle ]->src = sprintf( self::CDN . 'p/%1$s/%2$s/%3$s', $plugin_slug, $current_version, $local_path ); |
| 191 | $wp_scripts->registered[ $handle ]->ver = null; |
| 192 | } |
| 193 | } |
| 194 | } |
| 195 | foreach ( $wp_styles->registered as $handle => $thing ) { |
| 196 | if ( wp_startswith( $thing->src, self::CDN ) ) { |
| 197 | continue; |
| 198 | } |
| 199 | if ( wp_startswith( $thing->src, $plugin_directory_url ) ) { |
| 200 | $local_path = substr( $thing->src, strlen( $plugin_directory_url ) ); |
| 201 | if ( in_array( $local_path, $assets, true ) ) { |
| 202 | $wp_styles->registered[ $handle ]->src = sprintf( self::CDN . 'p/%1$s/%2$s/%3$s', $plugin_slug, $current_version, $local_path ); |
| 203 | $wp_styles->registered[ $handle ]->ver = null; |
| 204 | } |
| 205 | } |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * Returns cdn-able assets for a given plugin. |
| 211 | * |
| 212 | * @param string $plugin plugin slug string. |
| 213 | * @param string $version plugin version number string. |
| 214 | * @return array|bool Will return false if not a public version. |
| 215 | */ |
| 216 | public static function get_plugin_assets( $plugin, $version ) { |
| 217 | if ( 'jetpack' === $plugin && JETPACK__VERSION === $version ) { |
| 218 | if ( ! self::is_public_version( $version ) ) { |
| 219 | return false; |
| 220 | } |
| 221 | |
| 222 | $assets = array(); // The variable will be redefined in the included file. |
| 223 | |
| 224 | include JETPACK__PLUGIN_DIR . 'modules/photon-cdn/jetpack-manifest.php'; |
| 225 | return $assets; |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * Used for other plugins to provide their bundled assets via filter to |
| 230 | * prevent the need of storing them in an option or an external api request |
| 231 | * to w.org. |
| 232 | * |
| 233 | * @module photon-cdn |
| 234 | * |
| 235 | * @since 6.6.0 |
| 236 | * |
| 237 | * @param array $assets The assets array for the plugin. |
| 238 | * @param string $version The version of the plugin being requested. |
| 239 | */ |
| 240 | $assets = apply_filters( "jetpack_cdn_plugin_assets-{$plugin}", null, $version ); |
| 241 | if ( is_array( $assets ) ) { |
| 242 | return $assets; |
| 243 | } |
| 244 | |
| 245 | if ( ! self::is_public_version( $version ) ) { |
| 246 | return false; |
| 247 | } |
| 248 | |
| 249 | $cache = Jetpack_Options::get_option( 'static_asset_cdn_files', array() ); |
| 250 | if ( isset( $cache[ $plugin ][ $version ] ) ) { |
| 251 | if ( is_array( $cache[ $plugin ][ $version ] ) ) { |
| 252 | return $cache[ $plugin ][ $version ]; |
| 253 | } |
| 254 | if ( is_numeric( $cache[ $plugin ][ $version ] ) ) { |
| 255 | // Cache an empty result for up to 24h. |
| 256 | if ( (int) $cache[ $plugin ][ $version ] + DAY_IN_SECONDS > time() ) { |
| 257 | return array(); |
| 258 | } |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | $url = sprintf( 'http://downloads.wordpress.org/plugin-checksums/%s/%s.json', $plugin, $version ); |
| 263 | |
| 264 | if ( wp_http_supports( array( 'ssl' ) ) ) { |
| 265 | $url = set_url_scheme( $url, 'https' ); |
| 266 | } |
| 267 | |
| 268 | $response = wp_remote_get( $url ); |
| 269 | |
| 270 | $body = trim( wp_remote_retrieve_body( $response ) ); |
| 271 | $body = json_decode( $body, true ); |
| 272 | |
| 273 | $return = time(); |
| 274 | if ( is_array( $body ) ) { |
| 275 | $return = array_filter( array_keys( $body['files'] ), array( __CLASS__, 'is_js_or_css_file' ) ); |
| 276 | } |
| 277 | |
| 278 | $cache[ $plugin ] = array(); |
| 279 | $cache[ $plugin ][ $version ] = $return; |
| 280 | Jetpack_Options::update_option( 'static_asset_cdn_files', $cache, true ); |
| 281 | |
| 282 | return $return; |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * Checks a path whether it is a JS or CSS file. |
| 287 | * |
| 288 | * @param String $path file path. |
| 289 | * @return Boolean whether the file is a JS or CSS. |
| 290 | */ |
| 291 | public static function is_js_or_css_file( $path ) { |
| 292 | return ( false === strpos( $path, '?' ) ) && in_array( substr( $path, -3 ), array( 'css', '.js' ), true ); |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * Checks whether the version string indicates a production version. |
| 297 | * |
| 298 | * @param String $version the version string. |
| 299 | * @param Boolean $include_beta_and_rc whether to count beta and RC versions as production. |
| 300 | * @return Boolean |
| 301 | */ |
| 302 | public static function is_public_version( $version, $include_beta_and_rc = false ) { |
| 303 | if ( preg_match( '/^\d+(\.\d+)+$/', $version ) ) { |
| 304 | // matches `1` `1.2` `1.2.3`. |
| 305 | return true; |
| 306 | } elseif ( $include_beta_and_rc && preg_match( '/^\d+(\.\d+)+(-(beta|rc|pressable)\d?)$/i', $version ) ) { |
| 307 | // matches `1.2.3` `1.2.3-beta` `1.2.3-pressable` `1.2.3-beta1` `1.2.3-rc` `1.2.3-rc2`. |
| 308 | return true; |
| 309 | } |
| 310 | // unrecognized version. |
| 311 | return false; |
| 312 | } |
| 313 | } |
| 314 | /** |
| 315 | * Allow plugins to short-circuit the Asset CDN, even when the module is on. |
| 316 | * |
| 317 | * @module photon-cdn |
| 318 | * |
| 319 | * @since 6.7.0 |
| 320 | * |
| 321 | * @param false bool Should the Asset CDN be blocked? False by default. |
| 322 | */ |
| 323 | if ( true !== apply_filters( 'jetpack_force_disable_site_accelerator', false ) ) { |
| 324 | Jetpack_Photon_Static_Assets_CDN::go(); |
| 325 | } |
| 326 |