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| 1 | <?php |
| 2 | |
| 3 | namespace Automattic\Jetpack_Boost\Modules\Optimizations\Page_Cache; |
| 4 | |
| 5 | use Automattic\Jetpack_Boost\Lib\Analytics; |
| 6 | use Automattic\Jetpack_Boost\Lib\Super_Cache_Config_Compatibility; |
| 7 | use Automattic\Jetpack_Boost\Modules\Optimizations\Page_Cache\Pre_WordPress\Boost_Cache_Error; |
| 8 | use Automattic\Jetpack_Boost\Modules\Optimizations\Page_Cache\Pre_WordPress\Boost_Cache_Settings; |
| 9 | use Automattic\Jetpack_Boost\Modules\Optimizations\Page_Cache\Pre_WordPress\Filesystem_Utils; |
| 10 | use Automattic\Jetpack_Boost\Modules\Optimizations\Page_Cache\Pre_WordPress\Logger; |
| 11 | use Automattic\Jetpack_Boost\Modules\Optimizations\Page_Cache\Pre_WordPress\Path_Actions\Simple_Delete; |
| 12 | |
| 13 | class Page_Cache_Setup { |
| 14 | |
| 15 | private static $notices = array(); |
| 16 | |
| 17 | /** |
| 18 | * Runs setup steps and returns whether setup was successful or not. |
| 19 | * |
| 20 | * @return bool|\WP_Error |
| 21 | */ |
| 22 | public static function run_setup() { |
| 23 | // Steps that are only for cache system verification. They don't change anything. |
| 24 | $verification_steps = array( |
| 25 | 'verify_wp_content_writable', |
| 26 | 'verify_permalink_setting', |
| 27 | ); |
| 28 | |
| 29 | foreach ( $verification_steps as $step ) { |
| 30 | $result = self::run_step( $step ); |
| 31 | |
| 32 | if ( is_wp_error( $result ) ) { |
| 33 | return $result; |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | /* |
| 38 | * Steps that may change something to setup the cache system. |
| 39 | * Each of them should return the result in following format: |
| 40 | * - true if the step was successful and changes were made |
| 41 | * - false if the step was successful but no changes were made |
| 42 | * - WP_Error if the step failed |
| 43 | */ |
| 44 | $setup_steps = array( |
| 45 | 'create_settings_file', |
| 46 | 'create_advanced_cache', |
| 47 | 'add_wp_cache_define', |
| 48 | 'enable_caching', |
| 49 | ); |
| 50 | |
| 51 | $changes_made = false; |
| 52 | foreach ( $setup_steps as $step ) { |
| 53 | $result = self::run_step( $step ); |
| 54 | |
| 55 | if ( is_wp_error( $result ) ) { |
| 56 | return $result; |
| 57 | } |
| 58 | |
| 59 | if ( $result === true ) { |
| 60 | $changes_made = true; |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | if ( $changes_made ) { |
| 65 | Analytics::record_user_event( 'page_cache_setup_succeeded' ); |
| 66 | } |
| 67 | return true; |
| 68 | } |
| 69 | |
| 70 | public static function get_notices() { |
| 71 | return self::$notices; |
| 72 | } |
| 73 | |
| 74 | private static function add_notice( $title, $message ) { |
| 75 | self::$notices[] = array( |
| 76 | 'title' => $title, |
| 77 | 'message' => $message, |
| 78 | ); |
| 79 | } |
| 80 | |
| 81 | private static function run_step( $step ) { |
| 82 | $result = self::$step(); |
| 83 | |
| 84 | if ( $result instanceof Boost_Cache_Error ) { |
| 85 | Analytics::record_user_event( 'page_cache_setup_failed', array( 'error_code' => $result->get_error_code() ) ); |
| 86 | return $result->to_wp_error(); |
| 87 | } |
| 88 | |
| 89 | if ( is_wp_error( $result ) ) { |
| 90 | Analytics::record_user_event( 'page_cache_setup_failed', array( 'error_code' => $result->get_error_code() ) ); |
| 91 | return $result; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Enable caching step of setup. |
| 97 | * |
| 98 | * @return Boost_Cache_Error|bool - True on success, false if it was already enabled, error otherwise. |
| 99 | */ |
| 100 | private static function enable_caching() { |
| 101 | $settings = Boost_Cache_Settings::get_instance(); |
| 102 | $previous_value = $settings->get_enabled(); |
| 103 | |
| 104 | if ( $previous_value === true ) { |
| 105 | return false; |
| 106 | } |
| 107 | |
| 108 | $enabled_result = $settings->set( array( 'enabled' => true ) ); |
| 109 | |
| 110 | if ( $enabled_result === true ) { |
| 111 | Logger::debug( 'Caching enabled in cache config' ); |
| 112 | } |
| 113 | |
| 114 | return $enabled_result; |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Returns true if the wp-content directory is writeable. |
| 119 | */ |
| 120 | private static function verify_wp_content_writable() { |
| 121 | $filename = WP_CONTENT_DIR . '/' . uniqid() . '.txt'; |
| 122 | $result = @file_put_contents( $filename, 'test' ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_file_put_contents, WordPress.PHP.NoSilencedErrors.Discouraged |
| 123 | wp_delete_file( $filename ); |
| 124 | |
| 125 | if ( $result === false ) { |
| 126 | return new \WP_Error( 'wp-content-not-writable' ); |
| 127 | } |
| 128 | |
| 129 | return true; |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * Returns true if WordPress is using a proper permalink setup. WP_Error if not. |
| 134 | */ |
| 135 | private static function verify_permalink_setting() { |
| 136 | global $wp_rewrite; |
| 137 | |
| 138 | if ( ! $wp_rewrite || ! $wp_rewrite->using_permalinks() ) { |
| 139 | return new \WP_Error( 'not-using-permalinks' ); |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | /** |
| 144 | * Create a settings file, if one does not already exist. |
| 145 | * |
| 146 | * @return bool|\WP_Error - True if the file was created, WP_Error if there was a problem, or false if the file already exists. |
| 147 | */ |
| 148 | private static function create_settings_file() { |
| 149 | $result = Boost_Cache_Settings::get_instance()->create_settings_file(); |
| 150 | return $result; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * Get the path to the advanced-cache.php file. |
| 155 | * |
| 156 | * @return string The full path to the advanced-cache.php file. |
| 157 | */ |
| 158 | public static function get_advanced_cache_path() { |
| 159 | return WP_CONTENT_DIR . '/advanced-cache.php'; |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * Creates the advanced-cache.php file. |
| 164 | * |
| 165 | * Returns true if the files were setup correctly, or WP_Error if there was a problem. |
| 166 | * |
| 167 | * @return bool|\WP_Error |
| 168 | */ |
| 169 | private static function create_advanced_cache() { |
| 170 | $advanced_cache_filename = self::get_advanced_cache_path(); |
| 171 | |
| 172 | if ( file_exists( $advanced_cache_filename ) ) { |
| 173 | $content = file_get_contents( $advanced_cache_filename ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents |
| 174 | |
| 175 | if ( strpos( $content, 'WP SUPER CACHE' ) !== false ) { |
| 176 | // advanced-cache.php is already in use by WP Super Cache. |
| 177 | |
| 178 | if ( Super_Cache_Config_Compatibility::is_compatible() ) { |
| 179 | $deactivation = new Data_Sync_Actions\Deactivate_WPSC(); |
| 180 | $deactivation->handle(); |
| 181 | self::add_notice( |
| 182 | __( 'WP Super Cache Has Been Deactivated', 'jetpack-boost' ), |
| 183 | __( 'To ensure optimal performance, WP Super Cache has been automatically deactivated because Jetpack Boost\'s Cache is now active. Only one caching system can be used at a time.', 'jetpack-boost' ) |
| 184 | ); |
| 185 | |
| 186 | Analytics::record_user_event( |
| 187 | 'switch_to_boost_cache', |
| 188 | array( |
| 189 | 'type' => 'silent', |
| 190 | 'reason' => 'super_cache_compatible', |
| 191 | ) |
| 192 | ); |
| 193 | } else { |
| 194 | return new \WP_Error( 'advanced-cache-for-super-cache' ); |
| 195 | } |
| 196 | } elseif ( strpos( $content, Page_Cache::ADVANCED_CACHE_SIGNATURE ) === false ) { |
| 197 | // advanced-cache.php is in use by another plugin. |
| 198 | return new \WP_Error( 'advanced-cache-incompatible' ); |
| 199 | } |
| 200 | |
| 201 | if ( strpos( $content, Page_Cache::ADVANCED_CACHE_VERSION ) !== false ) { |
| 202 | // The advanced-cache.php file belongs to current version of Boost Cache. |
| 203 | return false; |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | $plugin_dir_name = untrailingslashit( str_replace( JETPACK_BOOST_PLUGIN_FILENAME, '', JETPACK_BOOST_PLUGIN_BASE ) ); |
| 208 | $boost_cache_filename = WP_CONTENT_DIR . '/plugins/' . $plugin_dir_name . '/app/modules/optimizations/page-cache/pre-wordpress/class-boost-cache.php'; |
| 209 | if ( ! file_exists( $boost_cache_filename ) ) { |
| 210 | return new \WP_Error( 'boost-cache-file-not-found' ); |
| 211 | } |
| 212 | $contents = '<?php |
| 213 | // ' . Page_Cache::ADVANCED_CACHE_SIGNATURE . ' - ' . Page_Cache::ADVANCED_CACHE_VERSION . ' |
| 214 | if ( ! file_exists( \'' . $boost_cache_filename . '\' ) ) { |
| 215 | return; |
| 216 | } |
| 217 | require_once( \'' . $boost_cache_filename . '\'); |
| 218 | $boost_cache = new Automattic\Jetpack_Boost\Modules\Optimizations\Page_Cache\Pre_WordPress\Boost_Cache(); |
| 219 | $boost_cache->init_actions(); |
| 220 | $boost_cache->serve(); |
| 221 | '; |
| 222 | |
| 223 | $write_advanced_cache = Filesystem_Utils::write_to_file( $advanced_cache_filename, $contents ); |
| 224 | if ( $write_advanced_cache instanceof Boost_Cache_Error ) { |
| 225 | return new \WP_Error( 'unable-to-write-to-advanced-cache', $write_advanced_cache->get_error_code() ); |
| 226 | } |
| 227 | self::clear_opcache( $advanced_cache_filename ); |
| 228 | |
| 229 | Logger::debug( 'Advanced cache file created' ); |
| 230 | |
| 231 | return true; |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Adds the WP_CACHE define to wp-config.php |
| 236 | */ |
| 237 | private static function add_wp_cache_define() { |
| 238 | $config_file = self::find_wp_config(); |
| 239 | if ( $config_file === false ) { |
| 240 | return new \WP_Error( 'wp-config-not-found' ); |
| 241 | } |
| 242 | |
| 243 | // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents |
| 244 | $content = file_get_contents( $config_file ); |
| 245 | if ( preg_match( '#^\s*(define\s*\(\s*[\'"]WP_CACHE[\'"]|const\s+WP_CACHE\s*=)#m', $content ) === 1 ) { |
| 246 | /* |
| 247 | * wp-settings.php checks "if ( WP_CACHE )" so it may be truthy and |
| 248 | * not === true to pass that check. |
| 249 | * Later, it is defined as false in default-constants.php, but |
| 250 | * it may have been defined manually as true using "true", 1, or "1" |
| 251 | * in wp-config.php. |
| 252 | */ |
| 253 | if ( defined( 'WP_CACHE' ) && ! WP_CACHE ) { |
| 254 | return new \WP_Error( 'wp-cache-defined-not-true' ); |
| 255 | } |
| 256 | |
| 257 | return false; // WP_CACHE already added. |
| 258 | } |
| 259 | $content = preg_replace( |
| 260 | '#^<\?php#', |
| 261 | '<?php |
| 262 | define( \'WP_CACHE\', true ); // ' . Page_Cache::ADVANCED_CACHE_SIGNATURE, |
| 263 | $content |
| 264 | ); |
| 265 | |
| 266 | $result = self::write_to_file_direct( $config_file, $content ); |
| 267 | if ( $result === false ) { |
| 268 | return new \WP_Error( 'wp-config-not-writable' ); |
| 269 | } |
| 270 | self::clear_opcache( $config_file ); |
| 271 | |
| 272 | Logger::debug( 'WP_CACHE constant added to wp-config.php' ); |
| 273 | |
| 274 | return true; |
| 275 | } |
| 276 | |
| 277 | /** |
| 278 | * Checks if page cache can be run or not. |
| 279 | * |
| 280 | * @return bool True if the advanced-cache.php file doesn't exist or belongs to Boost, false otherwise. |
| 281 | */ |
| 282 | public static function can_run_cache() { |
| 283 | $advanced_cache_path = self::get_advanced_cache_path(); |
| 284 | if ( ! file_exists( $advanced_cache_path ) ) { |
| 285 | return true; |
| 286 | } |
| 287 | |
| 288 | $content = file_get_contents( $advanced_cache_path ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents |
| 289 | return strpos( $content, Page_Cache::ADVANCED_CACHE_SIGNATURE ) !== false; |
| 290 | } |
| 291 | |
| 292 | /** |
| 293 | * Removes the advanced-cache.php file and the WP_CACHE define from wp-config.php |
| 294 | * Fired when the plugin is deactivated. |
| 295 | */ |
| 296 | public static function deactivate() { |
| 297 | $advanced_cache_deleted = self::delete_advanced_cache(); |
| 298 | // Only remove constant if Boost was the last to run caching. |
| 299 | // This is to avoid breaking caching for other plugins. |
| 300 | if ( $advanced_cache_deleted ) { |
| 301 | self::delete_wp_cache_constant(); |
| 302 | } else { |
| 303 | self::cleanup_wp_cache_constant(); |
| 304 | } |
| 305 | |
| 306 | return true; |
| 307 | } |
| 308 | |
| 309 | /** |
| 310 | * Removes the boost-cache directory, removing all cached files and the config file. |
| 311 | * Fired when the plugin is uninstalled. |
| 312 | */ |
| 313 | public static function uninstall() { |
| 314 | self::deactivate(); |
| 315 | // Call the Cache Preload module deactivation here to ensure it's cleaned up properly. |
| 316 | Cache_Preload::deactivate(); |
| 317 | $result = Filesystem_Utils::iterate_directory( WP_CONTENT_DIR . '/boost-cache', new Simple_Delete() ); |
| 318 | if ( $result instanceof Boost_Cache_Error ) { |
| 319 | return $result->to_wp_error(); |
| 320 | } |
| 321 | |
| 322 | return true; |
| 323 | } |
| 324 | |
| 325 | /** |
| 326 | * Deletes the file advanced-cache.php if it exists. |
| 327 | */ |
| 328 | public static function delete_advanced_cache() { |
| 329 | $advanced_cache_filename = self::get_advanced_cache_path(); |
| 330 | |
| 331 | if ( ! file_exists( $advanced_cache_filename ) ) { |
| 332 | return false; |
| 333 | } |
| 334 | |
| 335 | $deleted_file = false; |
| 336 | $content = file_get_contents( $advanced_cache_filename ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents |
| 337 | if ( strpos( $content, Page_Cache::ADVANCED_CACHE_SIGNATURE ) !== false ) { |
| 338 | wp_delete_file( $advanced_cache_filename ); |
| 339 | |
| 340 | // wp_delete_file doesn't return anything |
| 341 | // so we manually check if the file was deleted. |
| 342 | $deleted_file = ! file_exists( $advanced_cache_filename ); |
| 343 | } |
| 344 | |
| 345 | self::clear_opcache( $advanced_cache_filename ); |
| 346 | |
| 347 | return $deleted_file; |
| 348 | } |
| 349 | |
| 350 | /** |
| 351 | * Deletes the WP_CACHE define from wp-config.php |
| 352 | * |
| 353 | * @return \WP_Error if an error occurred. |
| 354 | */ |
| 355 | public static function delete_wp_cache_constant() { |
| 356 | $config_file = self::find_wp_config(); |
| 357 | if ( $config_file === false ) { |
| 358 | return; |
| 359 | } |
| 360 | |
| 361 | $lines = file( $config_file ); |
| 362 | $found = false; |
| 363 | foreach ( $lines as $key => $line ) { |
| 364 | if ( preg_match( '#define\s*\(\s*[\'"]WP_CACHE[\'"]#', $line ) === 1 && strpos( $line, Page_Cache::ADVANCED_CACHE_SIGNATURE ) !== false ) { |
| 365 | unset( $lines[ $key ] ); |
| 366 | $found = true; |
| 367 | } |
| 368 | } |
| 369 | if ( ! $found ) { |
| 370 | return; |
| 371 | } |
| 372 | $content = implode( '', $lines ); |
| 373 | Filesystem_Utils::write_to_file( $config_file, $content ); |
| 374 | self::clear_opcache( $config_file ); |
| 375 | } |
| 376 | |
| 377 | /** |
| 378 | * Removes the comment after WP_CACHE defined in wp-config.php (if any). |
| 379 | * |
| 380 | * @return void |
| 381 | */ |
| 382 | public static function cleanup_wp_cache_constant() { |
| 383 | $config_file = self::find_wp_config(); |
| 384 | if ( $config_file === false ) { |
| 385 | return; |
| 386 | } |
| 387 | |
| 388 | $lines = file( $config_file ); |
| 389 | $found = false; |
| 390 | foreach ( $lines as $key => $line ) { |
| 391 | if ( preg_match( '#define\s*\(\s*[\'"]WP_CACHE[\'"]#', $line ) === 1 && strpos( $line, Page_Cache::ADVANCED_CACHE_SIGNATURE ) !== false ) { |
| 392 | $lines[ $key ] = preg_replace( '#\s*?\/\/.*$#', '', $line ); |
| 393 | $found = true; |
| 394 | } |
| 395 | } |
| 396 | if ( ! $found ) { |
| 397 | return; |
| 398 | } |
| 399 | $content = implode( '', $lines ); |
| 400 | Filesystem_Utils::write_to_file( $config_file, $content ); |
| 401 | self::clear_opcache( $config_file ); |
| 402 | } |
| 403 | |
| 404 | /** |
| 405 | * Find location of wp-config.php file. |
| 406 | * |
| 407 | * @return string|false - The path to the wp-config.php file, or false if it was not found. |
| 408 | */ |
| 409 | private static function find_wp_config() { |
| 410 | if ( file_exists( ABSPATH . 'wp-config.php' ) ) { |
| 411 | return ABSPATH . 'wp-config.php'; |
| 412 | } elseif ( file_exists( dirname( ABSPATH ) . '/wp-config.php' ) && ! file_exists( dirname( ABSPATH ) . '/wp-settings.php' ) ) { |
| 413 | // While checking one directory up, check for wp-settings.php as well similar to WordPress core, to avoid nested WordPress installations. |
| 414 | return dirname( ABSPATH ) . '/wp-config.php'; |
| 415 | } |
| 416 | |
| 417 | return false; |
| 418 | } |
| 419 | |
| 420 | /** |
| 421 | * Clear opcache for a file. |
| 422 | */ |
| 423 | private static function clear_opcache( $file ) { |
| 424 | // If API functions are restricted, we can't do anything. |
| 425 | if ( ini_get( 'opcache.restrict_api' ) ) { |
| 426 | return; |
| 427 | } |
| 428 | |
| 429 | if ( function_exists( 'opcache_invalidate' ) ) { |
| 430 | opcache_invalidate( $file, true ); |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | private static function write_to_file_direct( $file, $content ) { |
| 435 | $filesystem = self::get_wp_filesystem(); |
| 436 | $chmod = $filesystem->getchmod( $file ); |
| 437 | if ( $chmod === false ) { |
| 438 | $chmod = 0644; // Default to a common permission for files |
| 439 | } else { |
| 440 | $chmod = intval( '0' . $chmod, 8 ); // Ensure leading zero |
| 441 | } |
| 442 | return $filesystem->put_contents( $file, $content, $chmod ); |
| 443 | } |
| 444 | |
| 445 | private static function get_wp_filesystem() { |
| 446 | require_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-base.php'; |
| 447 | require_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-direct.php'; |
| 448 | return new \WP_Filesystem_Direct( null ); |
| 449 | } |
| 450 | } |