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| 1 | <?php |
| 2 | /** |
| 3 | * @license GPL-2.0-or-later |
| 4 | * @file |
| 5 | * @author Trevor Parscal |
| 6 | * @author Roan Kattouw |
| 7 | */ |
| 8 | |
| 9 | namespace MediaWiki\ResourceLoader; |
| 10 | |
| 11 | use InvalidArgumentException; |
| 12 | use LogicException; |
| 13 | use MediaWiki\Config\Config; |
| 14 | use MediaWiki\HookContainer\HookContainer; |
| 15 | use MediaWiki\MainConfigNames; |
| 16 | use MediaWiki\MediaWikiServices; |
| 17 | use MediaWiki\Utils\FileContentsHasher; |
| 18 | use Peast\Peast; |
| 19 | use Peast\Syntax\Exception as PeastSyntaxException; |
| 20 | use Psr\Log\LoggerAwareInterface; |
| 21 | use Psr\Log\LoggerInterface; |
| 22 | use Psr\Log\NullLogger; |
| 23 | use RuntimeException; |
| 24 | use Wikimedia\RelPath; |
| 25 | |
| 26 | /** |
| 27 | * Abstraction for ResourceLoader modules, with name registration and maxage functionality. |
| 28 | * |
| 29 | * @see $wgResourceModules for the available options when registering a module. |
| 30 | * @stable to extend |
| 31 | * @ingroup ResourceLoader |
| 32 | * @since 1.17 |
| 33 | */ |
| 34 | abstract class Module implements LoggerAwareInterface { |
| 35 | /** @var Config */ |
| 36 | protected $config; |
| 37 | /** @var LoggerInterface */ |
| 38 | protected $logger; |
| 39 | |
| 40 | private ?VueComponentParser $vueComponentParser = null; |
| 41 | |
| 42 | /** |
| 43 | * Script and style modules form a hierarchy of trustworthiness, with core modules |
| 44 | * like skins and jQuery as most trustworthy, and user scripts as least trustworthy. We can |
| 45 | * limit the types of scripts and styles we allow to load on, say, sensitive special |
| 46 | * pages like Special:UserLogin and Special:Preferences |
| 47 | * @var int |
| 48 | */ |
| 49 | protected $origin = self::ORIGIN_CORE_SITEWIDE; |
| 50 | |
| 51 | /** @var string|null Module name */ |
| 52 | protected $name = null; |
| 53 | /** @var string[]|null Skin names */ |
| 54 | protected $skins = null; |
| 55 | |
| 56 | /** @var array Map of (variant => indirect file dependencies) */ |
| 57 | protected $fileDeps = []; |
| 58 | /** @var array Map of (language => in-object cache for message blob) */ |
| 59 | protected $msgBlobs = []; |
| 60 | /** @var array Map of (context hash => cached module version hash) */ |
| 61 | protected $versionHash = []; |
| 62 | /** @var array Map of (context hash => cached module content) */ |
| 63 | protected $contents = []; |
| 64 | |
| 65 | /** @var HookRunner|null */ |
| 66 | private $hookRunner; |
| 67 | |
| 68 | /** @var string|bool Deprecation string or true if deprecated; false otherwise */ |
| 69 | protected $deprecated = false; |
| 70 | |
| 71 | /** @var string Scripts only */ |
| 72 | public const TYPE_SCRIPTS = 'scripts'; |
| 73 | /** @var string Styles only */ |
| 74 | public const TYPE_STYLES = 'styles'; |
| 75 | /** @var string Scripts and styles */ |
| 76 | public const TYPE_COMBINED = 'combined'; |
| 77 | |
| 78 | /** @var string */ |
| 79 | public const GROUP_SITE = 'site'; |
| 80 | /** @var string */ |
| 81 | public const GROUP_USER = 'user'; |
| 82 | /** @var string */ |
| 83 | public const GROUP_PRIVATE = 'private'; |
| 84 | /** @var string */ |
| 85 | public const GROUP_NOSCRIPT = 'noscript'; |
| 86 | |
| 87 | /** @var string Module only has styles (loaded via <style> or <link rel=stylesheet>) */ |
| 88 | public const LOAD_STYLES = 'styles'; |
| 89 | /** @var string Module may have other resources (loaded via mw.loader from a script) */ |
| 90 | public const LOAD_GENERAL = 'general'; |
| 91 | |
| 92 | /** @var int Sitewide core module like a skin file or jQuery component */ |
| 93 | public const ORIGIN_CORE_SITEWIDE = 1; |
| 94 | /** @var int Per-user module generated by the software */ |
| 95 | public const ORIGIN_CORE_INDIVIDUAL = 2; |
| 96 | /** |
| 97 | * Sitewide module generated from user-editable files, like MediaWiki:Common.js, |
| 98 | * or modules accessible to multiple users, such as those generated by the Gadgets extension. |
| 99 | * @var int |
| 100 | */ |
| 101 | public const ORIGIN_USER_SITEWIDE = 3; |
| 102 | /** @var int Per-user module generated from user-editable files, like User:Me/vector.js */ |
| 103 | public const ORIGIN_USER_INDIVIDUAL = 4; |
| 104 | /** @var int An access constant; make sure this is kept as the largest number in this group */ |
| 105 | public const ORIGIN_ALL = 10; |
| 106 | |
| 107 | /** @var int Cache version for user-script JS validation errors from validateScriptFile(). */ |
| 108 | private const USERJSPARSE_CACHE_VERSION = 4; |
| 109 | |
| 110 | /** |
| 111 | * Get this module's name. This is set when the module is registered |
| 112 | * with ResourceLoader::register() |
| 113 | * |
| 114 | * @return string|null Name (string) or null if no name was set |
| 115 | */ |
| 116 | public function getName() { |
| 117 | return $this->name; |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Set this module's name. This is called by ResourceLoader::register() |
| 122 | * when registering the module. Other code should not call this. |
| 123 | * |
| 124 | * @param string $name |
| 125 | */ |
| 126 | public function setName( $name ) { |
| 127 | $this->name = $name; |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * Provide overrides for skinStyles to modules that support that. |
| 132 | * |
| 133 | * This MUST be called after self::setName(). |
| 134 | * |
| 135 | * @since 1.37 |
| 136 | * @see $wgResourceModuleSkinStyles |
| 137 | * @param array $moduleSkinStyles |
| 138 | */ |
| 139 | public function setSkinStylesOverride( array $moduleSkinStyles ): void { |
| 140 | // Stub, only supported by FileModule currently. |
| 141 | } |
| 142 | |
| 143 | /** |
| 144 | * Get this module's origin. This is set when the module is registered |
| 145 | * with ResourceLoader::register() |
| 146 | * |
| 147 | * @return int Module class constant, the subclass default if not set manually |
| 148 | */ |
| 149 | public function getOrigin() { |
| 150 | return $this->origin; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * @param Context $context |
| 155 | * @return bool |
| 156 | */ |
| 157 | public function getFlip( Context $context ) { |
| 158 | return MediaWikiServices::getInstance()->getContentLanguage()->getDir() !== |
| 159 | $context->getDirection(); |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * Get the deprecation warning, if any |
| 164 | * |
| 165 | * @since 1.41 |
| 166 | * @return string|null |
| 167 | */ |
| 168 | public function getDeprecationWarning() { |
| 169 | if ( !$this->deprecated ) { |
| 170 | return null; |
| 171 | } |
| 172 | $name = $this->getName(); |
| 173 | $warning = 'This page is using the deprecated ResourceLoader module "' . $name . '".'; |
| 174 | if ( is_string( $this->deprecated ) ) { |
| 175 | $warning .= "\n" . $this->deprecated; |
| 176 | } |
| 177 | return $warning; |
| 178 | } |
| 179 | |
| 180 | /** |
| 181 | * Get all JS for this module for a given language and skin. |
| 182 | * Includes all relevant JS except loader scripts. |
| 183 | * |
| 184 | * For multi-file modules where require() is used to load one file from |
| 185 | * another file, this should return an array structured as follows: |
| 186 | * ``` |
| 187 | * [ |
| 188 | * 'files' => [ |
| 189 | * 'file1.js' => [ 'type' => 'script', 'content' => 'JS code' ], |
| 190 | * 'file2.js' => [ 'type' => 'script', 'content' => 'JS code' ], |
| 191 | * 'data.json' => [ 'type' => 'data', 'content' => array ] |
| 192 | * ], |
| 193 | * 'main' => 'file1.js' |
| 194 | * ] |
| 195 | * ``` |
| 196 | * For plain concatenated scripts, this can either return a string, or an |
| 197 | * associative array similar to the one used for package files: |
| 198 | * ``` |
| 199 | * [ |
| 200 | * 'plainScripts' => [ |
| 201 | * [ 'content' => 'JS code' ], |
| 202 | * [ 'content' => 'JS code' ], |
| 203 | * ], |
| 204 | * ] |
| 205 | * ``` |
| 206 | * @stable to override |
| 207 | * @param Context $context |
| 208 | * @return string|array JavaScript code (string), or multi-file array with the |
| 209 | * following keys: |
| 210 | * - files: An associative array mapping file name to file info structure |
| 211 | * - main: The name of the main script, a key in the files array |
| 212 | * - plainScripts: An array of file info structures to be concatenated and |
| 213 | * executed when the module is loaded. |
| 214 | * Each file info structure has the following keys: |
| 215 | * - type: May be "script", "script-vue" or "data". Optional, default "script". |
| 216 | * - content: The string content of the file |
| 217 | * - filePath: A FilePath object describing the location of the source file. |
| 218 | * This will be used to construct the source map during minification. |
| 219 | */ |
| 220 | public function getScript( Context $context ) { |
| 221 | // Stub, override expected |
| 222 | return ''; |
| 223 | } |
| 224 | |
| 225 | /** |
| 226 | * Takes named templates by the module and returns an array mapping. |
| 227 | * |
| 228 | * @stable to override |
| 229 | * @return string[] Array of templates mapping template alias to content |
| 230 | */ |
| 231 | public function getTemplates() { |
| 232 | // Stub, override expected. |
| 233 | return []; |
| 234 | } |
| 235 | |
| 236 | /** |
| 237 | * @return Config |
| 238 | * @since 1.24 |
| 239 | */ |
| 240 | public function getConfig() { |
| 241 | if ( $this->config === null ) { |
| 242 | throw new RuntimeException( 'Config accessed before it is set' ); |
| 243 | } |
| 244 | |
| 245 | return $this->config; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * @param Config $config |
| 250 | * @since 1.24 |
| 251 | */ |
| 252 | public function setConfig( Config $config ) { |
| 253 | $this->config = $config; |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * @since 1.27 |
| 258 | * @param LoggerInterface $logger |
| 259 | */ |
| 260 | public function setLogger( LoggerInterface $logger ): void { |
| 261 | $this->logger = $logger; |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * @since 1.27 |
| 266 | * @return LoggerInterface |
| 267 | */ |
| 268 | protected function getLogger(): LoggerInterface { |
| 269 | if ( !$this->logger ) { |
| 270 | $this->logger = new NullLogger(); |
| 271 | } |
| 272 | return $this->logger; |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * @internal For use only by ResourceLoader::getModule |
| 277 | * @param HookContainer $hookContainer |
| 278 | */ |
| 279 | public function setHookContainer( HookContainer $hookContainer ): void { |
| 280 | $this->hookRunner = new HookRunner( $hookContainer ); |
| 281 | } |
| 282 | |
| 283 | /** |
| 284 | * Get a HookRunner for running core hooks. |
| 285 | * |
| 286 | * @internal For use only within core Module subclasses. Hook interfaces may be removed |
| 287 | * without notice. |
| 288 | * @return HookRunner |
| 289 | */ |
| 290 | protected function getHookRunner(): HookRunner { |
| 291 | return $this->hookRunner; |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * Whether this module supports URL loading. If this function returns false, |
| 296 | * getScript() will be used even in cases (debug mode, no only param) where |
| 297 | * getScriptURLsForDebug() would normally be used instead. |
| 298 | * |
| 299 | * @stable to override |
| 300 | * @return bool |
| 301 | */ |
| 302 | public function supportsURLLoading() { |
| 303 | return true; |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * Get all CSS for this module for a given skin. |
| 308 | * |
| 309 | * @stable to override |
| 310 | * @param Context $context |
| 311 | * @return array List of CSS strings or array of CSS strings keyed by media type. |
| 312 | * like [ 'screen' => '.foo { width: 0 }' ]; |
| 313 | * or [ 'screen' => [ '.foo { width: 0 }' ] ]; |
| 314 | */ |
| 315 | public function getStyles( Context $context ) { |
| 316 | // Stub, override expected |
| 317 | return []; |
| 318 | } |
| 319 | |
| 320 | /** |
| 321 | * Get the URL or URLs to load for this module's CSS in debug mode. |
| 322 | * The default behavior is to return a load.php?only=styles URL for |
| 323 | * the module, but file-based modules will want to override this to |
| 324 | * load the files directly |
| 325 | * |
| 326 | * This function must only be called when: |
| 327 | * |
| 328 | * 1. We're in debug mode, |
| 329 | * 2. There is no `only=` parameter and, |
| 330 | * 3. self::supportsURLLoading() returns true. |
| 331 | * |
| 332 | * |
| 333 | * @stable to override |
| 334 | * @param Context $context |
| 335 | * @return array [ mediaType => [ URL1, URL2, ... ], ... ] |
| 336 | */ |
| 337 | public function getStyleURLsForDebug( Context $context ) { |
| 338 | $resourceLoader = $context->getResourceLoader(); |
| 339 | $derivative = new DerivativeContext( $context ); |
| 340 | $derivative->setModules( [ $this->getName() ] ); |
| 341 | $derivative->setOnly( 'styles' ); |
| 342 | |
| 343 | $url = $resourceLoader->createLoaderURL( |
| 344 | $this->getSource(), |
| 345 | $derivative |
| 346 | ); |
| 347 | |
| 348 | return [ 'all' => [ $url ] ]; |
| 349 | } |
| 350 | |
| 351 | /** |
| 352 | * Get the messages needed for this module. |
| 353 | * |
| 354 | * To get a JSON blob with messages, use MessageBlobStore::get() |
| 355 | * |
| 356 | * @stable to override |
| 357 | * @return string[] List of message keys. Keys may occur more than once |
| 358 | */ |
| 359 | public function getMessages() { |
| 360 | // Stub, override expected |
| 361 | return []; |
| 362 | } |
| 363 | |
| 364 | /** |
| 365 | * Specifies the group this module is in. |
| 366 | * |
| 367 | * Return one of the Module::GROUP_ constants for reserved group names with special behavior, |
| 368 | * or a freeform string. |
| 369 | * Refer to https://www.mediawiki.org/wiki/ResourceLoader/Architecture#Groups for documentation. |
| 370 | * |
| 371 | * @stable to override |
| 372 | * @return string|null Group name |
| 373 | */ |
| 374 | public function getGroup() { |
| 375 | // Stub, override expected |
| 376 | return null; |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * Get the source of this module. Should only be overridden for foreign modules. |
| 381 | * |
| 382 | * @stable to override |
| 383 | * @return string Source name, 'local' for local modules |
| 384 | */ |
| 385 | public function getSource() { |
| 386 | // Stub, override expected |
| 387 | return 'local'; |
| 388 | } |
| 389 | |
| 390 | /** |
| 391 | * Get a list of modules this module depends on. |
| 392 | * |
| 393 | * Dependency information is taken into account when loading a module |
| 394 | * on the client side. |
| 395 | * |
| 396 | * Note: It is expected that $context will be made non-optional in the near |
| 397 | * future. |
| 398 | * |
| 399 | * @stable to override |
| 400 | * @param Context|null $context |
| 401 | * @return string[] List of module names as strings |
| 402 | */ |
| 403 | public function getDependencies( ?Context $context = null ) { |
| 404 | // Stub, override expected |
| 405 | return []; |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * Get list of skins for which this module must be available to load. |
| 410 | * |
| 411 | * By default, modules are available to all skins. |
| 412 | * |
| 413 | * This information may be used by the startup module to optimise registrations |
| 414 | * based on the current skin. |
| 415 | * |
| 416 | * @stable to override |
| 417 | * @since 1.39 |
| 418 | * @return string[]|null |
| 419 | */ |
| 420 | public function getSkins(): ?array { |
| 421 | return $this->skins; |
| 422 | } |
| 423 | |
| 424 | /** |
| 425 | * Get the module's load type. |
| 426 | * |
| 427 | * @stable to override |
| 428 | * @since 1.28 |
| 429 | * @return string Module LOAD_* constant |
| 430 | */ |
| 431 | public function getType() { |
| 432 | return self::LOAD_GENERAL; |
| 433 | } |
| 434 | |
| 435 | /** |
| 436 | * Get the skip function. |
| 437 | * |
| 438 | * Modules that provide fallback functionality can provide a "skip function". This |
| 439 | * function, if provided, will be passed along to the module registry on the client. |
| 440 | * When this module is loaded (either directly or as a dependency of another module), |
| 441 | * then this function is executed first. If the function returns true, the module will |
| 442 | * instantly be considered "ready" without requesting the associated module resources. |
| 443 | * |
| 444 | * The value returned here must be valid javascript for execution in a private function. |
| 445 | * It must not contain the "function () {" and "}" wrapper though. |
| 446 | * |
| 447 | * @stable to override |
| 448 | * @return string|null A JavaScript function body returning a boolean value, or null |
| 449 | */ |
| 450 | public function getSkipFunction() { |
| 451 | return null; |
| 452 | } |
| 453 | |
| 454 | /** |
| 455 | * Whether the module requires ES6 support in the client. |
| 456 | * |
| 457 | * If the client does not support ES6, attempting to load a module that requires ES6 will |
| 458 | * result in an error. |
| 459 | * |
| 460 | * @deprecated since 1.41, ignored by ResourceLoader |
| 461 | * @since 1.36 |
| 462 | * @return bool |
| 463 | */ |
| 464 | public function requiresES6() { |
| 465 | return true; |
| 466 | } |
| 467 | |
| 468 | /** |
| 469 | * Get the indirect dependencies for this module pursuant to the skin/language context |
| 470 | * |
| 471 | * These are only image files referenced by the module's stylesheet |
| 472 | * |
| 473 | * If neither setFileDependencies() nor setDependencyAccessCallbacks() was called, |
| 474 | * this will simply return a placeholder with an empty file list |
| 475 | * |
| 476 | * @see Module::setFileDependencies() |
| 477 | * @see Module::saveFileDependencies() |
| 478 | * @param Context $context |
| 479 | * @return string[] List of relative file paths |
| 480 | */ |
| 481 | protected function getFileDependencies( Context $context ) { |
| 482 | $variant = self::getVary( $context ); |
| 483 | |
| 484 | if ( !isset( $this->fileDeps[$variant] ) ) { |
| 485 | $depStore = $context->getResourceLoader()->getDependencyStore(); |
| 486 | $moduleName = $this->getName(); |
| 487 | $styleDependencies = $depStore->retrieve( "$moduleName|$variant" ); |
| 488 | $this->fileDeps[$variant] = $styleDependencies['paths']; |
| 489 | } |
| 490 | |
| 491 | return $this->fileDeps[$variant]; |
| 492 | } |
| 493 | |
| 494 | /** |
| 495 | * Set the indirect dependencies for this module pursuant to the skin/language context |
| 496 | * |
| 497 | * These are only image files referenced by the module's stylesheet |
| 498 | * |
| 499 | * @see Module::getFileDependencies() |
| 500 | * @see Module::saveFileDependencies() |
| 501 | * @param Context $context |
| 502 | * @param string[] $paths List of relative file paths |
| 503 | */ |
| 504 | public function setFileDependencies( Context $context, array $paths ) { |
| 505 | $variant = self::getVary( $context ); |
| 506 | $this->fileDeps[$variant] = $paths; |
| 507 | } |
| 508 | |
| 509 | /** |
| 510 | * Save the indirect dependencies for this module pursuant to the skin/language context |
| 511 | * |
| 512 | * @param Context $context |
| 513 | * @param string[] $curFileRefs List of newly computed indirect file dependencies |
| 514 | * @since 1.27 |
| 515 | */ |
| 516 | protected function saveFileDependencies( Context $context, array $curFileRefs ) { |
| 517 | // Pitfalls and performance considerations: |
| 518 | // 1. Don't keep updating the tracked paths due to duplicates or sorting. |
| 519 | // 2. Use relative paths to avoid ghost entries when $IP changes. (T111481) |
| 520 | // 3. Don't needlessly replace tracked paths with the same value |
| 521 | // just because $IP changed (e.g. when upgrading a wiki). |
| 522 | // 4. Don't create an endless replace loop on every request for this |
| 523 | // module when '../' is used anywhere. Even though both are expanded |
| 524 | // (one expanded by getFileDependencies from the DB, the other is |
| 525 | // still raw as originally read by RL), the latter has not |
| 526 | // been normalized yet. |
| 527 | |
| 528 | $paths = self::getRelativePaths( $curFileRefs ); |
| 529 | $priorPaths = $this->getFileDependencies( $context ); |
| 530 | |
| 531 | if ( array_diff( $paths, $priorPaths ) || array_diff( $priorPaths, $paths ) ) { |
| 532 | $depStore = $context->getResourceLoader()->getDependencyStore(); |
| 533 | $variant = self::getVary( $context ); |
| 534 | $moduleName = $this->getName(); |
| 535 | $depStore->storeMulti( [ "$moduleName|$variant" => $paths ] ); |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | /** |
| 540 | * Make file paths relative to MediaWiki directory. |
| 541 | * |
| 542 | * This is used to make file paths safe for storing in a database without the paths |
| 543 | * becoming stale or incorrect when MediaWiki is moved or upgraded (T111481). |
| 544 | * |
| 545 | * @since 1.27 |
| 546 | * @param array $filePaths |
| 547 | * @return array |
| 548 | */ |
| 549 | public static function getRelativePaths( array $filePaths ) { |
| 550 | global $IP; |
| 551 | return array_map( static function ( $path ) use ( $IP ) { |
| 552 | return RelPath::getRelativePath( $path, $IP ); |
| 553 | }, $filePaths ); |
| 554 | } |
| 555 | |
| 556 | /** |
| 557 | * Expand directories relative to $IP. |
| 558 | * |
| 559 | * @since 1.27 |
| 560 | * @param array $filePaths |
| 561 | * @return array |
| 562 | */ |
| 563 | public static function expandRelativePaths( array $filePaths ) { |
| 564 | global $IP; |
| 565 | return array_map( static function ( $path ) use ( $IP ) { |
| 566 | return RelPath::joinPath( $IP, $path ); |
| 567 | }, $filePaths ); |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * Get the hash of the message blob. |
| 572 | * |
| 573 | * @stable to override |
| 574 | * @since 1.27 |
| 575 | * @param Context $context |
| 576 | * @return string|null JSON blob or null if module has no messages |
| 577 | * @return-taint none -- do not propagate taint from $context->getLanguage() |
| 578 | */ |
| 579 | protected function getMessageBlob( Context $context ) { |
| 580 | if ( !$this->getMessages() ) { |
| 581 | // Don't bother consulting MessageBlobStore |
| 582 | return null; |
| 583 | } |
| 584 | // Message blobs may only vary language, not by context keys |
| 585 | $lang = $context->getLanguage(); |
| 586 | if ( !isset( $this->msgBlobs[$lang] ) ) { |
| 587 | $this->getLogger()->warning( 'Message blob for {module} should have been preloaded', [ |
| 588 | 'module' => $this->getName(), |
| 589 | ] ); |
| 590 | $store = $context->getResourceLoader()->getMessageBlobStore(); |
| 591 | $this->msgBlobs[$lang] = $store->getBlob( $this, $lang ); |
| 592 | } |
| 593 | return $this->msgBlobs[$lang]; |
| 594 | } |
| 595 | |
| 596 | /** |
| 597 | * Set in-object cache for message blobs. |
| 598 | * |
| 599 | * Used to allow fetching of message blobs in batches. See ResourceLoader::preloadModuleInfo(). |
| 600 | * |
| 601 | * @since 1.27 |
| 602 | * @param string|null $blob JSON blob or null |
| 603 | * @param string $lang Language code |
| 604 | */ |
| 605 | public function setMessageBlob( $blob, $lang ) { |
| 606 | $this->msgBlobs[$lang] = $blob; |
| 607 | } |
| 608 | |
| 609 | /** |
| 610 | * Get headers to send as part of a module web response. |
| 611 | * |
| 612 | * It is not supported to send headers through this method that are |
| 613 | * required to be unique or otherwise sent once in an HTTP response |
| 614 | * because clients may make batch requests for multiple modules (as |
| 615 | * is the default behaviour for ResourceLoader clients). |
| 616 | * |
| 617 | * For exclusive or aggregated headers, see ResourceLoader::sendResponseHeaders(). |
| 618 | * |
| 619 | * @since 1.30 |
| 620 | * @param Context $context |
| 621 | * @return string[] Array of HTTP response headers |
| 622 | */ |
| 623 | final public function getHeaders( Context $context ) { |
| 624 | $formattedLinks = []; |
| 625 | foreach ( $this->getPreloadLinks( $context ) as $url => $attribs ) { |
| 626 | $link = "<{$url}>;rel=preload"; |
| 627 | foreach ( $attribs as $key => $val ) { |
| 628 | $link .= ";{$key}={$val}"; |
| 629 | } |
| 630 | $formattedLinks[] = $link; |
| 631 | } |
| 632 | if ( $formattedLinks ) { |
| 633 | return [ 'Link: ' . implode( ',', $formattedLinks ) ]; |
| 634 | } |
| 635 | return []; |
| 636 | } |
| 637 | |
| 638 | /** |
| 639 | * Get a list of resources that web browsers may preload. |
| 640 | * |
| 641 | * Behaviour of rel=preload link is specified at <https://www.w3.org/TR/preload/>. |
| 642 | * |
| 643 | * Use case for ResourceLoader originally part of T164299. |
| 644 | * |
| 645 | * @par Example |
| 646 | * @code |
| 647 | * protected function getPreloadLinks() { |
| 648 | * return [ |
| 649 | * 'https://example.org/script.js' => [ 'as' => 'script' ], |
| 650 | * 'https://example.org/image.png' => [ 'as' => 'image' ], |
| 651 | * ]; |
| 652 | * } |
| 653 | * @endcode |
| 654 | * |
| 655 | * @par Example using HiDPI image variants |
| 656 | * @code |
| 657 | * protected function getPreloadLinks() { |
| 658 | * return [ |
| 659 | * 'https://example.org/logo.png' => [ |
| 660 | * 'as' => 'image', |
| 661 | * 'media' => 'not all and (min-resolution: 2dppx)', |
| 662 | * ], |
| 663 | * 'https://example.org/logo@2x.png' => [ |
| 664 | * 'as' => 'image', |
| 665 | * 'media' => '(min-resolution: 2dppx)', |
| 666 | * ], |
| 667 | * ]; |
| 668 | * } |
| 669 | * @endcode |
| 670 | * |
| 671 | * @see Module::getHeaders |
| 672 | * |
| 673 | * @stable to override |
| 674 | * @since 1.30 |
| 675 | * @param Context $context |
| 676 | * @return array Keyed by url, values must be an array containing |
| 677 | * at least an 'as' key. Optionally a 'media' key as well. |
| 678 | */ |
| 679 | protected function getPreloadLinks( Context $context ) { |
| 680 | return []; |
| 681 | } |
| 682 | |
| 683 | /** |
| 684 | * Get module-specific LESS variables, if any. |
| 685 | * |
| 686 | * @stable to override |
| 687 | * @since 1.27 |
| 688 | * @param Context $context |
| 689 | * @return array Module-specific LESS variables. |
| 690 | */ |
| 691 | protected function getLessVars( Context $context ) { |
| 692 | return []; |
| 693 | } |
| 694 | |
| 695 | /** |
| 696 | * Get an array of this module's resources. Ready for serving to the web. |
| 697 | * |
| 698 | * @since 1.26 |
| 699 | * @param Context $context |
| 700 | * @return array |
| 701 | */ |
| 702 | public function getModuleContent( Context $context ) { |
| 703 | $contextHash = $context->getHash(); |
| 704 | // Cache this expensive operation. This calls builds the scripts, styles, and messages |
| 705 | // content which typically involves filesystem and/or database access. |
| 706 | if ( !array_key_exists( $contextHash, $this->contents ) ) { |
| 707 | $this->contents[$contextHash] = $this->buildContent( $context ); |
| 708 | } |
| 709 | return $this->contents[$contextHash]; |
| 710 | } |
| 711 | |
| 712 | /** |
| 713 | * Bundle all resources attached to this module into an array. |
| 714 | * |
| 715 | * @since 1.26 |
| 716 | * @param Context $context |
| 717 | * @return array |
| 718 | */ |
| 719 | final protected function buildContent( Context $context ) { |
| 720 | $statsFactory = MediaWikiServices::getInstance()->getStatsFactory(); |
| 721 | $timer = $statsFactory->getTiming( 'resourceloader_build_seconds' ) |
| 722 | ->setLabel( 'name', strtr( $this->getName(), '.', '_' ) ) |
| 723 | ->start(); |
| 724 | |
| 725 | // This MUST build both scripts and styles, regardless of whether $context->getOnly() |
| 726 | // is 'scripts' or 'styles' because the result is used by getVersionHash which |
| 727 | // must be consistent regardless of the 'only' filter on the current request. |
| 728 | // Also, when introducing new module content resources (e.g. templates, headers), |
| 729 | // these should only be included in the array when they are non-empty so that |
| 730 | // existing modules not using them do not get their cache invalidated. |
| 731 | $content = []; |
| 732 | |
| 733 | // Scripts |
| 734 | $scripts = $this->getScript( $context ); |
| 735 | if ( is_string( $scripts ) ) { |
| 736 | $scripts = [ 'plainScripts' => [ [ 'content' => $scripts ] ] ]; |
| 737 | } |
| 738 | $content['scripts'] = $scripts; |
| 739 | |
| 740 | $styles = []; |
| 741 | // Don't create empty stylesheets like [ '' => '' ] for modules |
| 742 | // that don't *have* any stylesheets (T40024). |
| 743 | $stylePairs = $this->getStyles( $context ); |
| 744 | if ( count( $stylePairs ) ) { |
| 745 | // If we are in debug mode without &only= set, we'll want to return an array of URLs |
| 746 | // See comment near shouldIncludeScripts() for more details |
| 747 | if ( $context->getDebug() && !$context->getOnly() && $this->supportsURLLoading() ) { |
| 748 | $styles = [ |
| 749 | 'url' => $this->getStyleURLsForDebug( $context ) |
| 750 | ]; |
| 751 | } else { |
| 752 | // Minify CSS before embedding in mw.loader.impl call |
| 753 | // (unless in debug mode) |
| 754 | if ( !$context->getDebug() ) { |
| 755 | foreach ( $stylePairs as $media => $style ) { |
| 756 | // Can be either a string or an array of strings. |
| 757 | if ( is_array( $style ) ) { |
| 758 | $stylePairs[$media] = []; |
| 759 | foreach ( $style as $cssText ) { |
| 760 | if ( is_string( $cssText ) ) { |
| 761 | $stylePairs[$media][] = |
| 762 | ResourceLoader::filter( 'minify-css', $cssText ); |
| 763 | } |
| 764 | } |
| 765 | } elseif ( is_string( $style ) ) { |
| 766 | $stylePairs[$media] = ResourceLoader::filter( 'minify-css', $style ); |
| 767 | } |
| 768 | } |
| 769 | } |
| 770 | // Wrap styles into @media groups as needed and flatten into a numerical array |
| 771 | $styles = [ |
| 772 | 'css' => ResourceLoader::makeCombinedStyles( $stylePairs ) |
| 773 | ]; |
| 774 | } |
| 775 | } |
| 776 | $content['styles'] = $styles; |
| 777 | |
| 778 | // Messages |
| 779 | $blob = $this->getMessageBlob( $context ); |
| 780 | if ( $blob ) { |
| 781 | $content['messagesBlob'] = $blob; |
| 782 | } |
| 783 | |
| 784 | $templates = $this->getTemplates(); |
| 785 | if ( $templates ) { |
| 786 | $content['templates'] = $templates; |
| 787 | } |
| 788 | |
| 789 | $headers = $this->getHeaders( $context ); |
| 790 | if ( $headers ) { |
| 791 | $content['headers'] = $headers; |
| 792 | } |
| 793 | |
| 794 | $deprecationWarning = $this->getDeprecationWarning(); |
| 795 | if ( $deprecationWarning !== null ) { |
| 796 | $content['deprecationWarning'] = $deprecationWarning; |
| 797 | } |
| 798 | |
| 799 | $timer->stop(); |
| 800 | |
| 801 | return $content; |
| 802 | } |
| 803 | |
| 804 | /** |
| 805 | * Get a string identifying the current version of this module in a given context. |
| 806 | * |
| 807 | * Whenever anything happens that changes the module's response (e.g. scripts, styles, and |
| 808 | * messages) this value must change. This value is used to store module responses in caches, |
| 809 | * both server-side (by a CDN, or other HTTP cache), and client-side (in `mw.loader.store`, |
| 810 | * and in the browser's own HTTP cache). |
| 811 | * |
| 812 | * The underlying methods called here for any given module should be quick because this |
| 813 | * is called for potentially thousands of module bundles in the same request as part of the |
| 814 | * StartUpModule, which is how we invalidate caches and propagate changes to clients. |
| 815 | * |
| 816 | * @since 1.26 |
| 817 | * @see self::getDefinitionSummary for how to customize version computation. |
| 818 | * @param Context $context |
| 819 | * @return string Hash formatted by ResourceLoader::makeHash |
| 820 | */ |
| 821 | final public function getVersionHash( Context $context ) { |
| 822 | if ( $context->getDebug() ) { |
| 823 | // In debug mode, make uncached startup module extra fast by not computing any hashes. |
| 824 | // Server responses from load.php for individual modules already have no-cache so |
| 825 | // we don't need them. This also makes breakpoint debugging easier, as each module |
| 826 | // gets its own consistent URL. (T235672) |
| 827 | return ''; |
| 828 | } |
| 829 | |
| 830 | // Cache this somewhat expensive operation. Especially because some classes |
| 831 | // (e.g. startup module) iterate more than once over all modules to get versions. |
| 832 | $contextHash = $context->getHash(); |
| 833 | if ( !array_key_exists( $contextHash, $this->versionHash ) ) { |
| 834 | if ( $this->enableModuleContentVersion() ) { |
| 835 | // Detect changes directly by hashing the module contents. |
| 836 | $str = json_encode( $this->getModuleContent( $context ) ); |
| 837 | } else { |
| 838 | // Infer changes based on definition and other metrics |
| 839 | $summary = $this->getDefinitionSummary( $context ); |
| 840 | if ( !isset( $summary['_class'] ) ) { |
| 841 | throw new LogicException( 'getDefinitionSummary must call parent method' ); |
| 842 | } |
| 843 | $str = json_encode( $summary ); |
| 844 | } |
| 845 | |
| 846 | $this->versionHash[$contextHash] = ResourceLoader::makeHash( $str ); |
| 847 | } |
| 848 | return $this->versionHash[$contextHash]; |
| 849 | } |
| 850 | |
| 851 | /** |
| 852 | * Whether to generate version hash based on module content. |
| 853 | * |
| 854 | * If a module requires database or file system access to build the module |
| 855 | * content, consider disabling this in favour of manually tracking relevant |
| 856 | * aspects in getDefinitionSummary(). See getVersionHash() for how this is used. |
| 857 | * |
| 858 | * @stable to override |
| 859 | * @return bool |
| 860 | */ |
| 861 | public function enableModuleContentVersion() { |
| 862 | return false; |
| 863 | } |
| 864 | |
| 865 | /** |
| 866 | * Get the definition summary for this module. |
| 867 | * |
| 868 | * This is the method subclasses are recommended to use to track data that |
| 869 | * should influence the module's version hash. |
| 870 | * |
| 871 | * Subclasses must call the parent getDefinitionSummary() and add to the |
| 872 | * returned array. It is recommended that each subclass appends its own array, |
| 873 | * to prevent clashes or accidental overwrites of array keys from the parent |
| 874 | * class. This gives each subclass a clean scope. |
| 875 | * |
| 876 | * @code |
| 877 | * $summary = parent::getDefinitionSummary( $context ); |
| 878 | * $summary[] = [ |
| 879 | * 'foo' => 123, |
| 880 | * 'bar' => 'quux', |
| 881 | * ]; |
| 882 | * return $summary; |
| 883 | * @endcode |
| 884 | * |
| 885 | * Return an array that contains all significant properties that define the |
| 886 | * module. The returned data should be deterministic and only change when |
| 887 | * the generated module response would change. Prefer content hashes over |
| 888 | * modified timestamps because timestamps may change for unrelated reasons |
| 889 | * and are not deterministic (T102578). For example, because timestamps are |
| 890 | * not stored in Git, each branch checkout would cause all files to appear as |
| 891 | * new. Timestamps also tend to not match between servers causing additional |
| 892 | * ever-lasting churning of the version hash. |
| 893 | * |
| 894 | * Be careful not to normalise the data too much in an effort to be deterministic. |
| 895 | * For example, if a module concatenates files together (order is significant), |
| 896 | * then the definition summary could be a list of file names, and a list of |
| 897 | * file hashes. These lists should not be sorted as that would mean the cache |
| 898 | * is not invalidated when the order changes (T39812). |
| 899 | * |
| 900 | * This data structure must exclusively contain primitive "scalar" values, |
| 901 | * as it will be serialised using `json_encode`. |
| 902 | * |
| 903 | * @stable to override |
| 904 | * @since 1.23 |
| 905 | * @param Context $context |
| 906 | * @return array|null |
| 907 | */ |
| 908 | public function getDefinitionSummary( Context $context ) { |
| 909 | return [ |
| 910 | '_class' => static::class, |
| 911 | // Make sure that when filter cache for minification is invalidated, |
| 912 | // we also change the HTTP urls and mw.loader.store keys (T176884). |
| 913 | '_cacheVersion' => ResourceLoader::CACHE_VERSION, |
| 914 | ]; |
| 915 | } |
| 916 | |
| 917 | /** |
| 918 | * Check whether this module is known to be empty. If a child class |
| 919 | * has an easy and cheap way to determine that this module is |
| 920 | * definitely going to be empty, it should override this method to |
| 921 | * return true in that case. Callers may optimize the request for this |
| 922 | * module away if this function returns true. |
| 923 | * |
| 924 | * @stable to override |
| 925 | * @param Context $context |
| 926 | * @return bool |
| 927 | */ |
| 928 | public function isKnownEmpty( Context $context ) { |
| 929 | return false; |
| 930 | } |
| 931 | |
| 932 | /** |
| 933 | * Check whether this module should be embedded rather than linked |
| 934 | * |
| 935 | * Modules returning true here will be embedded rather than loaded by |
| 936 | * ClientHtml. |
| 937 | * |
| 938 | * @since 1.30 |
| 939 | * @stable to override |
| 940 | * @param Context $context |
| 941 | * @return bool |
| 942 | */ |
| 943 | public function shouldEmbedModule( Context $context ) { |
| 944 | return $this->getGroup() === self::GROUP_PRIVATE; |
| 945 | } |
| 946 | |
| 947 | /** |
| 948 | * Whether to skip the structure test ResourcesTest::testRespond() for this |
| 949 | * module. |
| 950 | * |
| 951 | * @since 1.42 |
| 952 | * @stable to override |
| 953 | * @return bool |
| 954 | */ |
| 955 | public function shouldSkipStructureTest() { |
| 956 | return $this->getGroup() === self::GROUP_PRIVATE; |
| 957 | } |
| 958 | |
| 959 | /** |
| 960 | * Validate a user-provided JavaScript blob. |
| 961 | * |
| 962 | * @param string $fileName Page title |
| 963 | * @param string $contents JavaScript code |
| 964 | * @return string JavaScript code, either the original content or a replacement |
| 965 | * that uses `mw.log.error()` to communicate a syntax error. |
| 966 | */ |
| 967 | protected function validateScriptFile( $fileName, $contents ) { |
| 968 | if ( !$this->getConfig()->get( MainConfigNames::ResourceLoaderValidateJS ) ) { |
| 969 | return $contents; |
| 970 | } |
| 971 | $cache = MediaWikiServices::getInstance()->getMainWANObjectCache(); |
| 972 | // Cache potentially slow parsing of JavaScript code during the critical path. |
| 973 | // This happens during load.php requests for modules=site, modules=user, and Gadgets. |
| 974 | $error = $cache->getWithSetCallback( |
| 975 | // A content hash is included in the cache key so that this is immediately |
| 976 | // correct and re-computed after edits without relying on TTL or purges. |
| 977 | // |
| 978 | // We avoid accidental or abusive conflicts with other pages by including the |
| 979 | // wiki (makeKey vs makeGlobalKey) and page, because hashes are not unique. |
| 980 | $cache->makeKey( |
| 981 | 'resourceloader-userjsparse', |
| 982 | self::USERJSPARSE_CACHE_VERSION, |
| 983 | md5( $contents ), |
| 984 | $fileName |
| 985 | ), |
| 986 | $cache::TTL_WEEK, |
| 987 | static function () use ( $contents ) { |
| 988 | try { |
| 989 | Peast::ES2017( $contents )->parse(); |
| 990 | } catch ( PeastSyntaxException $e ) { |
| 991 | return $e->getMessage() . " on line " . $e->getPosition()->getLine(); |
| 992 | } |
| 993 | // Cache success as null |
| 994 | return null; |
| 995 | } |
| 996 | ); |
| 997 | |
| 998 | if ( $error ) { |
| 999 | // Send the error to the browser console client-side. |
| 1000 | // By returning this as replacement for the actual script, |
| 1001 | // we ensure user-provided scripts are safe to serve to a browser, |
| 1002 | // without breaking unrelated modules in the same response. |
| 1003 | return 'mw.log.error(' . |
| 1004 | json_encode( |
| 1005 | "Parse error: $error in $fileName" |
| 1006 | ) . |
| 1007 | ');'; |
| 1008 | } |
| 1009 | return $contents; |
| 1010 | } |
| 1011 | |
| 1012 | /** |
| 1013 | * @param Context $context |
| 1014 | * @param string $content |
| 1015 | * @return array |
| 1016 | * @throws InvalidArgumentException If the input is invalid |
| 1017 | */ |
| 1018 | protected function parseVueContent( Context $context, string $content ): array { |
| 1019 | $this->vueComponentParser ??= new VueComponentParser; |
| 1020 | $parsedComponent = $this->vueComponentParser->parse( |
| 1021 | $content, |
| 1022 | [ 'minifyTemplate' => !$context->getDebug() ] |
| 1023 | ); |
| 1024 | $encodedTemplate = json_encode( $parsedComponent['template'] ); |
| 1025 | if ( $context->getDebug() ) { |
| 1026 | // Replace \n (backslash-n) with space + backslash-n + backslash-newline in debug mode |
| 1027 | // The \n has to be preserved to prevent Vue parser issues (T351771) |
| 1028 | // We only replace \n if not preceded by a backslash, to avoid breaking '\\n' |
| 1029 | $encodedTemplate = preg_replace( '/(?<!\\\\)\\\\n/', " \\n\\\n", $encodedTemplate ); |
| 1030 | // Expand \t to real tabs in debug mode |
| 1031 | $encodedTemplate = strtr( $encodedTemplate, [ "\\t" => "\t" ] ); |
| 1032 | } |
| 1033 | return [ |
| 1034 | 'script' => $parsedComponent['script'] . |
| 1035 | ";\nmodule.exports.template = $encodedTemplate;", |
| 1036 | 'style' => $parsedComponent['style'] ?? '', |
| 1037 | 'styleLang' => $parsedComponent['styleLang'] ?? 'css' |
| 1038 | ]; |
| 1039 | } |
| 1040 | |
| 1041 | /** |
| 1042 | * Compute a non-cryptographic string hash of a file's contents. |
| 1043 | * If the file does not exist or cannot be read, returns an empty string. |
| 1044 | * |
| 1045 | * @since 1.26 Uses MD4 instead of SHA1. |
| 1046 | * @param string $filePath |
| 1047 | * @return string Hash |
| 1048 | */ |
| 1049 | protected static function safeFileHash( $filePath ) { |
| 1050 | return FileContentsHasher::getFileContentsHash( $filePath ); |
| 1051 | } |
| 1052 | |
| 1053 | /** |
| 1054 | * Get vary string. |
| 1055 | * |
| 1056 | * @internal For internal use only. |
| 1057 | * @param Context $context |
| 1058 | * @return string |
| 1059 | */ |
| 1060 | public static function getVary( Context $context ) { |
| 1061 | return implode( '|', [ |
| 1062 | $context->getSkin(), |
| 1063 | $context->getLanguage(), |
| 1064 | ] ); |
| 1065 | } |
| 1066 | } |