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| 1 | <?php |
| 2 | |
| 3 | use Automattic\Jetpack_Boost\Admin\Config as Boost_Admin_Config; |
| 4 | use Automattic\Jetpack_Boost\Lib\Minify; |
| 5 | use Automattic\Jetpack_Boost\Lib\Minify\Config; |
| 6 | use Automattic\Jetpack_Boost\Lib\Minify\File_Paths; |
| 7 | use Automattic\Jetpack_Boost\Lib\Minify\Utils; |
| 8 | |
| 9 | if ( ! defined( 'JETPACK_BOOST_STATIC_CACHE_404_TESTER_PATH' ) ) { |
| 10 | define( 'JETPACK_BOOST_STATIC_CACHE_404_TESTER_PATH', '/wp-content/boost-cache/static/testing_404.js' ); |
| 11 | } |
| 12 | |
| 13 | function jetpack_boost_handle_minify_request( $request_uri ) { |
| 14 | // We handle the cache here, tell other caches not to. |
| 15 | if ( ! defined( 'DONOTCACHEPAGE' ) ) { |
| 16 | define( 'DONOTCACHEPAGE', true ); |
| 17 | } |
| 18 | |
| 19 | $output = jetpack_boost_build_minify_output( $request_uri ); |
| 20 | $content = $output['content']; |
| 21 | $headers = $output['headers']; |
| 22 | |
| 23 | foreach ( $headers as $header ) { |
| 24 | header( $header ); |
| 25 | } |
| 26 | |
| 27 | // Check if we're on Atomic and take advantage of the Atomic Edge Cache. |
| 28 | if ( defined( 'ATOMIC_CLIENT_ID' ) ) { |
| 29 | header( 'A8c-Edge-Cache: cache' ); |
| 30 | } |
| 31 | |
| 32 | header( 'X-Page-Optimize: uncached' ); |
| 33 | header( 'Cache-Control: max-age=' . 31536000 ); |
| 34 | header( 'ETag: "' . md5( $content ) . '"' ); |
| 35 | |
| 36 | echo $content; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- We need to trust this unfortunately. |
| 37 | |
| 38 | // Cache the generated data, if possible. |
| 39 | $use_cache = Config::can_use_static_cache(); |
| 40 | if ( $use_cache ) { |
| 41 | $file_parts = jetpack_boost_minify_get_file_parts( $request_uri ); |
| 42 | if ( is_array( $file_parts ) && isset( $file_parts['file_name'] ) && isset( $file_parts['file_extension'] ) ) { |
| 43 | $cache_dir = Config::get_static_cache_dir_path(); |
| 44 | $cache_file_path = $cache_dir . '/' . $file_parts['file_name'] . '.min.' . $file_parts['file_extension']; |
| 45 | |
| 46 | // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_file_put_contents |
| 47 | file_put_contents( $cache_file_path, $content ); |
| 48 | } |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Using a crafted request, we can check if is_404() is working in wp-content/ |
| 54 | * The constant JETPACK_BOOST_STATIC_CACHE_404_TESTER_PATH is the path to the file that will be requested. |
| 55 | */ |
| 56 | function jetpack_boost_check_404_handler( $request_uri ) { |
| 57 | if ( ! str_contains( strtolower( $request_uri ), JETPACK_BOOST_STATIC_CACHE_404_TESTER_PATH ) ) { |
| 58 | return; |
| 59 | } |
| 60 | |
| 61 | if ( is_404() ) { |
| 62 | if ( ! is_dir( Config::get_static_cache_dir_path() ) ) { |
| 63 | mkdir( Config::get_static_cache_dir_path(), 0775, true ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_mkdir |
| 64 | } |
| 65 | file_put_contents( Config::get_static_cache_dir_path() . '/404', '1' ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_file_put_contents |
| 66 | return true; |
| 67 | } else { |
| 68 | wp_delete_file( Config::get_static_cache_dir_path() . '/404' ); |
| 69 | return false; |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * This ensures that the 404 tester is only run once per day, espicially for multisite. |
| 75 | */ |
| 76 | function jetpack_boost_404_tester_cron() { |
| 77 | // If we see it's been executed within 24 hours, don't run |
| 78 | if ( ! jetpack_boost_should_run_daily_network_cron_job( '404_tester' ) ) { |
| 79 | return; |
| 80 | } |
| 81 | |
| 82 | jetpack_boost_404_tester(); |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * This function is used to test if is_404() is working in wp-content/ |
| 87 | * It sends a request to a non-existent URL, that will execute the 404 handler |
| 88 | * in jetpack_boost_check_404_handler(). |
| 89 | * Define the constant JETPACK_BOOST_DISABLE_404_TESTER to disable this. |
| 90 | * The constant JETPACK_BOOST_STATIC_CACHE_404_TESTER_PATH is the path to the file that will be requested. |
| 91 | * |
| 92 | * This function is called when the Minify_CSS or Minify_JS module is activated, and once per day. |
| 93 | */ |
| 94 | function jetpack_boost_404_tester() { |
| 95 | if ( defined( 'JETPACK_BOOST_DISABLE_404_TESTER' ) && JETPACK_BOOST_DISABLE_404_TESTER ) { |
| 96 | return; |
| 97 | } |
| 98 | |
| 99 | $minification_enabled = ''; |
| 100 | wp_remote_get( home_url( JETPACK_BOOST_STATIC_CACHE_404_TESTER_PATH ) ); |
| 101 | if ( file_exists( Config::get_static_cache_dir_path() . '/404' ) ) { |
| 102 | wp_delete_file( Config::get_static_cache_dir_path() . '/404' ); |
| 103 | $minification_enabled = 1; |
| 104 | } else { |
| 105 | $minification_enabled = 0; |
| 106 | } |
| 107 | update_site_option( 'jetpack_boost_static_minification', $minification_enabled ); |
| 108 | |
| 109 | return $minification_enabled; |
| 110 | } |
| 111 | |
| 112 | add_action( 'jetpack_boost_404_tester_cron', 'jetpack_boost_404_tester_cron' ); |
| 113 | |
| 114 | /** |
| 115 | * Setup the 404 tester. |
| 116 | * |
| 117 | * Schedule the 404 tester if the concatenation modules |
| 118 | * haven't been toggled since this feature was released. |
| 119 | * Only run this in wp-admin to avoid excessive updates to the option. |
| 120 | */ |
| 121 | function jetpack_boost_404_setup() { |
| 122 | // If we're on Atomic or Woa, don't setup the 404 tester. |
| 123 | if ( in_array( Boost_Admin_Config::get_hosting_provider(), array( 'atomic', 'woa' ), true ) ) { |
| 124 | return; |
| 125 | } |
| 126 | |
| 127 | if ( is_admin() && get_site_option( 'jetpack_boost_static_minification', 'na' ) === 'na' ) { |
| 128 | update_site_option( 'jetpack_boost_static_minification', 0 ); // Add a default value if not set to avoid an extra SQL query. |
| 129 | } |
| 130 | |
| 131 | jetpack_boost_page_optimize_schedule_404_tester(); |
| 132 | } |
| 133 | |
| 134 | /** |
| 135 | * This function is used to clean up the static cache folder. |
| 136 | * It removes files with the file extension passed in the $file_extension parameter. |
| 137 | * |
| 138 | * @param string $file_extension The file extension to clean up. |
| 139 | */ |
| 140 | function jetpack_boost_page_optimize_cleanup_cache( $file_extension ) { |
| 141 | $files = glob( Config::get_static_cache_dir_path() . "/*.min.{$file_extension}" ); |
| 142 | foreach ( $files as $file ) { |
| 143 | wp_delete_file( $file ); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * This function is used to clean up the static cache folder. |
| 149 | * It removes files that are stale and no longer needed. |
| 150 | * A file is considered stale if it's older than the files it depends on. |
| 151 | */ |
| 152 | function jetpack_boost_minify_remove_stale_static_files() { |
| 153 | $concat_files = glob( Config::get_static_cache_dir_path() . '/*.min.*' ); |
| 154 | foreach ( $concat_files as $concat_file ) { |
| 155 | if ( ! file_exists( $concat_file ) ) { |
| 156 | continue; |
| 157 | } |
| 158 | |
| 159 | $file_mtime = filemtime( $concat_file ); |
| 160 | $file_parts = pathinfo( $concat_file ); |
| 161 | $hash = substr( $file_parts['basename'], 0, strpos( $file_parts['basename'], '.' ) ); |
| 162 | $paths = File_Paths::get( $hash ); |
| 163 | if ( $paths ) { |
| 164 | $args = $paths->get_paths(); |
| 165 | if ( ! is_array( $args ) ) { |
| 166 | continue; |
| 167 | } |
| 168 | |
| 169 | // Get the site path relative to the webroot. |
| 170 | $site_url_path = wp_parse_url( site_url(), PHP_URL_PATH ); |
| 171 | if ( ! $site_url_path ) { |
| 172 | $site_url_path = ''; |
| 173 | } |
| 174 | |
| 175 | // Get the webroot path by removing the site path from the ABSPATH. In case it's a subdirectory install, webroot is different from ABSPATH. |
| 176 | $webroot = substr( ABSPATH, 0, - strlen( $site_url_path ) - 1 ); |
| 177 | |
| 178 | foreach ( $args as $dependency_filename ) { |
| 179 | if ( ! file_exists( $webroot . $dependency_filename ) || filemtime( $webroot . $dependency_filename ) > $file_mtime ) { |
| 180 | wp_delete_file( $concat_file ); // remove the file from the cache because it's stale. |
| 181 | } |
| 182 | } |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | function jetpack_boost_build_minify_output( $request_uri ) { |
| 188 | $utils = new Utils(); |
| 189 | $jetpack_boost_page_optimize_types = jetpack_boost_page_optimize_types(); |
| 190 | |
| 191 | // Config |
| 192 | $concat_max_files = jetpack_boost_minify_concat_max_files(); |
| 193 | $concat_unique = true; |
| 194 | |
| 195 | $file_parts = jetpack_boost_minify_get_file_parts( $request_uri ); |
| 196 | if ( ! $file_parts ) { |
| 197 | jetpack_boost_page_optimize_status_exit( 404 ); |
| 198 | } |
| 199 | |
| 200 | $file_paths = jetpack_boost_page_optimize_get_file_paths( $file_parts['file_name'] ); |
| 201 | |
| 202 | // file_paths contain something like array( '/foo/bar.css', '/foo1/bar/baz.css' ) |
| 203 | if ( count( $file_paths ) > $concat_max_files ) { |
| 204 | jetpack_boost_page_optimize_status_exit( 400 ); |
| 205 | } |
| 206 | |
| 207 | // If we're in a subdirectory context, use that as the root. |
| 208 | // We can't assume that the root serves the same content as the subdir. |
| 209 | $subdir_path_prefix = ''; |
| 210 | $request_path = $utils->parse_url( $request_uri, PHP_URL_PATH ); |
| 211 | $_static_index = strpos( $request_path, jetpack_boost_get_static_prefix() ); |
| 212 | if ( $_static_index > 0 ) { |
| 213 | $subdir_path_prefix = substr( $request_path, 0, $_static_index ); |
| 214 | } |
| 215 | unset( $request_path, $_static_index ); |
| 216 | |
| 217 | $last_modified = 0; |
| 218 | $pre_output = ''; |
| 219 | $output = ''; |
| 220 | |
| 221 | $mime_type = ''; |
| 222 | |
| 223 | foreach ( $file_paths as $uri ) { |
| 224 | $fullpath = jetpack_boost_page_optimize_get_path( $uri ); |
| 225 | |
| 226 | if ( ! file_exists( $fullpath ) ) { |
| 227 | jetpack_boost_page_optimize_status_exit( 404 ); |
| 228 | } |
| 229 | |
| 230 | $mime_type = jetpack_boost_page_optimize_get_mime_type( $fullpath ); |
| 231 | if ( ! in_array( $mime_type, $jetpack_boost_page_optimize_types, true ) ) { |
| 232 | jetpack_boost_page_optimize_status_exit( 400 ); |
| 233 | } |
| 234 | |
| 235 | if ( $concat_unique ) { |
| 236 | if ( ! isset( $last_mime_type ) ) { |
| 237 | $last_mime_type = $mime_type; |
| 238 | } |
| 239 | |
| 240 | if ( $last_mime_type !== $mime_type ) { |
| 241 | jetpack_boost_page_optimize_status_exit( 400 ); |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | $stat = stat( $fullpath ); |
| 246 | if ( false === $stat ) { |
| 247 | jetpack_boost_page_optimize_status_exit( 500 ); |
| 248 | } |
| 249 | |
| 250 | if ( $stat['mtime'] > $last_modified ) { |
| 251 | $last_modified = $stat['mtime']; |
| 252 | } |
| 253 | |
| 254 | // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents |
| 255 | $buf = file_get_contents( $fullpath ); |
| 256 | if ( false === $buf ) { |
| 257 | jetpack_boost_page_optimize_status_exit( 500 ); |
| 258 | } |
| 259 | |
| 260 | if ( 'text/css' === $mime_type ) { |
| 261 | $dirpath = jetpack_boost_strip_parent_path( $subdir_path_prefix, dirname( $uri ) ); |
| 262 | |
| 263 | // url(relative/path/to/file) -> url(/absolute/and/not/relative/path/to/file) |
| 264 | $buf = jetpack_boost_page_optimize_relative_path_replace( $buf, $dirpath ); |
| 265 | |
| 266 | // phpcs:ignore Squiz.PHP.CommentedOutCode.Found |
| 267 | // This regex changes things like AlphaImageLoader(...src='relative/path/to/file'...) to AlphaImageLoader(...src='/absolute/path/to/file'...) |
| 268 | $buf = preg_replace( |
| 269 | '/(Microsoft.AlphaImageLoader\s*\([^\)]*src=(?:\'|")?)([^\/\'"\s\)](?:(?<!http:|https:).)*)\)/isU', |
| 270 | '$1' . ( $dirpath === '/' ? '/' : $dirpath . '/' ) . '$2)', |
| 271 | $buf |
| 272 | ); |
| 273 | |
| 274 | // The @charset rules must be on top of the output |
| 275 | if ( str_starts_with( $buf, '@charset' ) ) { |
| 276 | $buf = preg_replace_callback( |
| 277 | '/(?P<charset_rule>@charset\s+[\'"][^\'"]+[\'"];)/i', |
| 278 | function ( $match ) use ( &$pre_output ) { |
| 279 | if ( str_starts_with( $pre_output, '@charset' ) ) { |
| 280 | return ''; |
| 281 | } |
| 282 | |
| 283 | $pre_output = $match[0] . "\n" . $pre_output; |
| 284 | |
| 285 | return ''; |
| 286 | }, |
| 287 | $buf |
| 288 | ); |
| 289 | } |
| 290 | |
| 291 | // Move the @import rules on top of the concatenated output. |
| 292 | // Only @charset rule are allowed before them. |
| 293 | if ( str_contains( $buf, '@import' ) ) { |
| 294 | $buf = preg_replace_callback( |
| 295 | '/(?P<pre_path>@import\s+(?:url\s*\()?[\'"\s]*)(?P<path>[^\'"\s](?:https?:\/\/.+\/?)?.+?)(?P<post_path>[\'"\s\)]*;)/i', |
| 296 | function ( $match ) use ( $dirpath, &$pre_output ) { |
| 297 | if ( ! str_starts_with( $match['path'], 'http' ) && '/' !== $match['path'][0] ) { |
| 298 | $pre_output .= $match['pre_path'] . ( $dirpath === '/' ? '/' : $dirpath . '/' ) . |
| 299 | $match['path'] . $match['post_path'] . "\n"; |
| 300 | } else { |
| 301 | $pre_output .= $match[0] . "\n"; |
| 302 | } |
| 303 | |
| 304 | return ''; |
| 305 | }, |
| 306 | $buf |
| 307 | ); |
| 308 | } |
| 309 | |
| 310 | // If filename indicates it's already minified, don't minify it again. |
| 311 | if ( ! jetpack_boost_page_optimize_is_already_minified( $fullpath ) ) { |
| 312 | // Minify CSS. |
| 313 | $buf = Minify::css( $buf ); |
| 314 | } |
| 315 | $output .= "$buf"; |
| 316 | } else { |
| 317 | // If filename indicates it's already minified, don't minify it again. |
| 318 | if ( ! jetpack_boost_page_optimize_is_already_minified( $fullpath ) ) { |
| 319 | // Minify JS |
| 320 | $buf = Minify::js( $buf ); |
| 321 | } |
| 322 | |
| 323 | $output .= "$buf;\n"; |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | // Don't let trailing whitespace ruin everyone's day. Seems to get stripped by batcache |
| 328 | // resulting in ns_error_net_partial_transfer errors. |
| 329 | $output = rtrim( $output ); |
| 330 | |
| 331 | $headers = array( |
| 332 | 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s', $last_modified ) . ' GMT', |
| 333 | "Content-Type: $mime_type", |
| 334 | ); |
| 335 | |
| 336 | return array( |
| 337 | 'headers' => $headers, |
| 338 | 'content' => $pre_output . $output, |
| 339 | ); |
| 340 | } |
| 341 | |
| 342 | /** |
| 343 | * Get the file name and extension from the request URI. |
| 344 | * |
| 345 | * @param string $request_uri The request URI. |
| 346 | * @return array|false The file name and extension, or false if the request URI is invalid. |
| 347 | */ |
| 348 | function jetpack_boost_minify_get_file_parts( $request_uri ) { |
| 349 | $utils = new Utils(); |
| 350 | $request_uri = $utils->unslash( $request_uri ); |
| 351 | |
| 352 | $file_path = $utils->parse_url( $request_uri, PHP_URL_PATH ); |
| 353 | if ( $file_path === false ) { |
| 354 | return false; |
| 355 | } |
| 356 | |
| 357 | $file_info = pathinfo( $file_path ); |
| 358 | |
| 359 | $minify_path = $utils->parse_url( jetpack_boost_get_minify_url(), PHP_URL_PATH ); |
| 360 | if ( trailingslashit( $file_info['dirname'] ) !== $minify_path ) { |
| 361 | return false; |
| 362 | } |
| 363 | |
| 364 | $allowed_extensions = array_keys( jetpack_boost_page_optimize_types() ); |
| 365 | if ( ! isset( $file_info['extension'] ) || ! in_array( $file_info['extension'], $allowed_extensions, true ) ) { |
| 366 | return false; |
| 367 | } |
| 368 | |
| 369 | // The base name (without the extension) might contain ".min". |
| 370 | // Example - 777873a36e.min |
| 371 | $file_name_parts = explode( '.', $file_info['basename'] ); |
| 372 | $file_name = $file_name_parts[0]; |
| 373 | |
| 374 | return array( |
| 375 | 'file_name' => $file_name, |
| 376 | 'file_extension' => $file_info['extension'] ?? '', |
| 377 | ); |
| 378 | } |