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| 1 | <?php |
| 2 | /** |
| 3 | * @license GPL-2.0-or-later |
| 4 | * @file |
| 5 | */ |
| 6 | namespace MediaWiki\Rest\Handler\Helper; |
| 7 | |
| 8 | use InvalidArgumentException; |
| 9 | use MediaWiki\Content\Content; |
| 10 | use MediaWiki\Content\IContentHandlerFactory; |
| 11 | use MediaWiki\Content\UnknownContentModelException; |
| 12 | use MediaWiki\Edit\ParsoidOutputStash; |
| 13 | use MediaWiki\Edit\ParsoidRenderID; |
| 14 | use MediaWiki\Edit\SelserContext; |
| 15 | use MediaWiki\Exception\HttpError; |
| 16 | use MediaWiki\Language\LanguageCode; |
| 17 | use MediaWiki\Language\LanguageFactory; |
| 18 | use MediaWiki\Logger\LoggerFactory; |
| 19 | use MediaWiki\MainConfigNames; |
| 20 | use MediaWiki\MediaWikiServices; |
| 21 | use MediaWiki\Page\PageIdentity; |
| 22 | use MediaWiki\Page\PageLookup; |
| 23 | use MediaWiki\Page\PageRecord; |
| 24 | use MediaWiki\Page\ParserOutputAccess; |
| 25 | use MediaWiki\Parser\ContentHolder; |
| 26 | use MediaWiki\Parser\ParserOptions; |
| 27 | use MediaWiki\Parser\ParserOutput; |
| 28 | use MediaWiki\Parser\Parsoid\Config\SiteConfig as ParsoidSiteConfig; |
| 29 | use MediaWiki\Parser\Parsoid\HtmlTransformFactory; |
| 30 | use MediaWiki\Parser\Parsoid\PageBundleParserOutputConverter; |
| 31 | use MediaWiki\Permissions\Authority; |
| 32 | use MediaWiki\Rest\Handler; |
| 33 | use MediaWiki\Rest\HttpException; |
| 34 | use MediaWiki\Rest\LocalizedHttpException; |
| 35 | use MediaWiki\Rest\ResponseInterface; |
| 36 | use MediaWiki\Revision\MutableRevisionRecord; |
| 37 | use MediaWiki\Revision\RevisionAccessException; |
| 38 | use MediaWiki\Revision\RevisionLookup; |
| 39 | use MediaWiki\Revision\RevisionRecord; |
| 40 | use MediaWiki\Revision\RevisionRenderer; |
| 41 | use MediaWiki\Revision\SlotRecord; |
| 42 | use MediaWiki\Status\Status; |
| 43 | use MediaWiki\Title\Title; |
| 44 | use RuntimeException; |
| 45 | use Wikimedia\Assert\Assert; |
| 46 | use Wikimedia\Bcp47Code\Bcp47Code; |
| 47 | use Wikimedia\Bcp47Code\Bcp47CodeValue; |
| 48 | use Wikimedia\Message\MessageValue; |
| 49 | use Wikimedia\ParamValidator\ParamValidator; |
| 50 | use Wikimedia\Parsoid\Core\ClientError; |
| 51 | use Wikimedia\Parsoid\Core\HtmlPageBundle; |
| 52 | use Wikimedia\Parsoid\Core\ResourceLimitExceededException; |
| 53 | use Wikimedia\Parsoid\DOM\DocumentFragment; |
| 54 | use Wikimedia\Parsoid\DOM\Element; |
| 55 | use Wikimedia\Parsoid\Parsoid; |
| 56 | use Wikimedia\Parsoid\Utils\DOMUtils; |
| 57 | use Wikimedia\Parsoid\Utils\WTUtils; |
| 58 | use Wikimedia\Stats\StatsFactory; |
| 59 | |
| 60 | /** |
| 61 | * Helper for getting output of a given wikitext page rendered by parsoid. |
| 62 | * |
| 63 | * @since 1.36 |
| 64 | * |
| 65 | * @unstable Pending consolidation of the Parsoid extension with core code. |
| 66 | */ |
| 67 | class HtmlOutputRendererHelper implements HtmlOutputHelper { |
| 68 | use RestAuthorizeTrait; |
| 69 | use RestStatusTrait; |
| 70 | |
| 71 | /** |
| 72 | * @internal |
| 73 | */ |
| 74 | public const CONSTRUCTOR_OPTIONS = [ |
| 75 | MainConfigNames::ParsoidCacheConfig |
| 76 | ]; |
| 77 | |
| 78 | private const OUTPUT_FLAVORS = [ 'view', 'stash', 'fragment', 'edit' ]; |
| 79 | |
| 80 | /** @var PageIdentity|null */ |
| 81 | private $page = null; |
| 82 | |
| 83 | /** @var RevisionRecord|int|null */ |
| 84 | private $revisionOrId = null; |
| 85 | |
| 86 | /** @var Bcp47Code|null */ |
| 87 | private $pageLanguage = null; |
| 88 | |
| 89 | /** @var ?string One of the flavors from OUTPUT_FLAVORS */ |
| 90 | private $flavor = null; |
| 91 | |
| 92 | /** @var bool */ |
| 93 | private $stash = false; |
| 94 | |
| 95 | /** @var Authority */ |
| 96 | private $authority; |
| 97 | |
| 98 | /** @var ParserOutput */ |
| 99 | private $parserOutput; |
| 100 | |
| 101 | /** @var ParserOutput */ |
| 102 | private $processedParserOutput; |
| 103 | |
| 104 | /** @var ?Bcp47Code */ |
| 105 | private $sourceLanguage = null; |
| 106 | |
| 107 | /** @var ?Bcp47Code */ |
| 108 | private $targetLanguage = null; |
| 109 | |
| 110 | /** |
| 111 | * Should we ignore mismatches between $page and the page that $revision belongs to? |
| 112 | * Usually happens because of page moves. This should be set to true only for internal API calls. |
| 113 | */ |
| 114 | private bool $lenientRevHandling = false; |
| 115 | |
| 116 | /** |
| 117 | * @see the $options parameter on Parsoid::wikitext2html |
| 118 | * @var array |
| 119 | */ |
| 120 | private $parsoidOptions = []; |
| 121 | |
| 122 | private ?ParserOptions $parserOptions = null; |
| 123 | |
| 124 | /** |
| 125 | * Whether the result can be cached in the parser cache and the web cache. |
| 126 | * Set to false when bespoke options are set. |
| 127 | * |
| 128 | * @var bool |
| 129 | */ |
| 130 | private $isCacheable = true; |
| 131 | |
| 132 | private ParsoidOutputStash $parsoidOutputStash; |
| 133 | private StatsFactory $statsFactory; |
| 134 | private ParserOutputAccess $parserOutputAccess; |
| 135 | private PageLookup $pageLookup; |
| 136 | private RevisionLookup $revisionLookup; |
| 137 | private RevisionRenderer $revisionRenderer; |
| 138 | private ParsoidSiteConfig $parsoidSiteConfig; |
| 139 | private HtmlTransformFactory $htmlTransformFactory; |
| 140 | private IContentHandlerFactory $contentHandlerFactory; |
| 141 | private LanguageFactory $languageFactory; |
| 142 | |
| 143 | /** |
| 144 | * @param ParsoidOutputStash $parsoidOutputStash |
| 145 | * @param StatsFactory $statsFactory |
| 146 | * @param ParserOutputAccess $parserOutputAccess |
| 147 | * @param PageLookup $pageLookup |
| 148 | * @param RevisionLookup $revisionLookup |
| 149 | * @param RevisionRenderer $revisionRenderer |
| 150 | * @param ParsoidSiteConfig $parsoidSiteConfig |
| 151 | * @param HtmlTransformFactory $htmlTransformFactory |
| 152 | * @param IContentHandlerFactory $contentHandlerFactory |
| 153 | * @param LanguageFactory $languageFactory |
| 154 | * @param PageIdentity|null $page |
| 155 | * @param array $parameters |
| 156 | * @param Authority|null $authority |
| 157 | * @param RevisionRecord|int|null $revision |
| 158 | * @param bool $lenientRevHandling Should we ignore mismatches between |
| 159 | * $page and the page that $revision belongs to? Usually happens |
| 160 | * because of page moves. This should be set to true only for |
| 161 | * internal API calls. |
| 162 | * @param ParserOptions|null $parserOptions |
| 163 | * @note Since 1.43, setting $page and $authority arguments to null |
| 164 | * has been deprecated. |
| 165 | */ |
| 166 | public function __construct( |
| 167 | ParsoidOutputStash $parsoidOutputStash, |
| 168 | StatsFactory $statsFactory, |
| 169 | ParserOutputAccess $parserOutputAccess, |
| 170 | PageLookup $pageLookup, |
| 171 | RevisionLookup $revisionLookup, |
| 172 | RevisionRenderer $revisionRenderer, |
| 173 | ParsoidSiteConfig $parsoidSiteConfig, |
| 174 | HtmlTransformFactory $htmlTransformFactory, |
| 175 | IContentHandlerFactory $contentHandlerFactory, |
| 176 | LanguageFactory $languageFactory, |
| 177 | ?PageIdentity $page = null, |
| 178 | array $parameters = [], |
| 179 | ?Authority $authority = null, |
| 180 | $revision = null, |
| 181 | bool $lenientRevHandling = false, |
| 182 | ?ParserOptions $parserOptions = null |
| 183 | ) { |
| 184 | $this->parsoidOutputStash = $parsoidOutputStash; |
| 185 | $this->statsFactory = $statsFactory; |
| 186 | $this->parserOutputAccess = $parserOutputAccess; |
| 187 | $this->pageLookup = $pageLookup; |
| 188 | $this->revisionLookup = $revisionLookup; |
| 189 | $this->revisionRenderer = $revisionRenderer; |
| 190 | $this->parsoidSiteConfig = $parsoidSiteConfig; |
| 191 | $this->htmlTransformFactory = $htmlTransformFactory; |
| 192 | $this->contentHandlerFactory = $contentHandlerFactory; |
| 193 | $this->languageFactory = $languageFactory; |
| 194 | $this->lenientRevHandling = $lenientRevHandling; |
| 195 | $this->parserOptions = $parserOptions; |
| 196 | if ( $page === null || $authority === null ) { |
| 197 | // Constructing without $page and $authority parameters |
| 198 | // is deprecated since 1.43. |
| 199 | wfDeprecated( __METHOD__ . ' without $page or $authority', '1.43' ); |
| 200 | } else { |
| 201 | $this->initInternal( $page, $parameters, $authority, $revision ); |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * Sets the given flavor to use for Wikitext -> HTML transformations. |
| 207 | * |
| 208 | * Flavors may influence parser options, parsoid options, and DOM transformations. |
| 209 | * They will be reflected by the ETag returned by getETag(). |
| 210 | * |
| 211 | * @note This method should not be called if stashing mode is enabled. |
| 212 | * @see setStashingEnabled |
| 213 | * @see getFlavor() |
| 214 | * |
| 215 | * @param string $flavor |
| 216 | * |
| 217 | * @return void |
| 218 | */ |
| 219 | public function setFlavor( string $flavor ): void { |
| 220 | if ( !in_array( $flavor, self::OUTPUT_FLAVORS ) ) { |
| 221 | throw new InvalidArgumentException( 'Invalid flavor supplied' ); |
| 222 | } |
| 223 | |
| 224 | if ( $this->stash ) { |
| 225 | // XXX: throw? |
| 226 | $flavor = 'stash'; |
| 227 | } |
| 228 | |
| 229 | $this->flavor = $flavor; |
| 230 | } |
| 231 | |
| 232 | /** |
| 233 | * Returns the flavor of HTML that will be generated. |
| 234 | * @see setFlavor() |
| 235 | * @return string |
| 236 | */ |
| 237 | public function getFlavor(): string { |
| 238 | return $this->flavor; |
| 239 | } |
| 240 | |
| 241 | /** |
| 242 | * Set the desired Parsoid profile version for the output. |
| 243 | * The actual output version is selected to be compatible with the one given here, |
| 244 | * per the rules of semantic versioning. |
| 245 | * |
| 246 | * @note Will disable caching if the effective output version is different from the default. |
| 247 | * |
| 248 | * @param string $version |
| 249 | * |
| 250 | * @throws HttpException If the given version is not supported (status 406) |
| 251 | */ |
| 252 | public function setOutputProfileVersion( $version ) { |
| 253 | $outputContentVersion = Parsoid::resolveContentVersion( $version ); |
| 254 | |
| 255 | if ( !$outputContentVersion ) { |
| 256 | throw new LocalizedHttpException( |
| 257 | new MessageValue( "rest-unsupported-profile-version", [ $version ] ), 406 |
| 258 | ); |
| 259 | } |
| 260 | |
| 261 | // Only set the option if the value isn't the default! |
| 262 | if ( $outputContentVersion !== Parsoid::defaultHTMLVersion() ) { |
| 263 | throw new LocalizedHttpException( |
| 264 | new MessageValue( "rest-unsupported-profile-version", [ $version ] ), 406 |
| 265 | ); |
| 266 | |
| 267 | // TODO: (T347426) At some later point, we may reintroduce support for |
| 268 | // non-default content versions as part of work on the content |
| 269 | // negotiation protocol. |
| 270 | // |
| 271 | // // See Parsoid::wikitext2html |
| 272 | // $this->parsoidOptions['outputContentVersion'] = $outputContentVersion; |
| 273 | // $this->isCacheable = false; |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | /** |
| 278 | * Determine whether stashing should be applied. |
| 279 | * |
| 280 | * @param bool $stash |
| 281 | * |
| 282 | * @return void |
| 283 | */ |
| 284 | public function setStashingEnabled( bool $stash ): void { |
| 285 | $this->stash = $stash; |
| 286 | |
| 287 | if ( $stash ) { |
| 288 | $this->setFlavor( 'stash' ); |
| 289 | } elseif ( $this->flavor === 'stash' ) { |
| 290 | $this->setFlavor( 'view' ); |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * Set the revision to render. |
| 296 | * |
| 297 | * This can take a fake RevisionRecord when rendering for previews |
| 298 | * or when switching the editor from source mode to visual mode. |
| 299 | * |
| 300 | * In that case, $revisionOrId->getId() must return 0 to indicate |
| 301 | * that the ParserCache should be bypassed. Stashing may still apply. |
| 302 | * |
| 303 | * @param RevisionRecord|int $revisionOrId |
| 304 | */ |
| 305 | public function setRevision( $revisionOrId ): void { |
| 306 | Assert::parameterType( [ RevisionRecord::class, 'integer' ], $revisionOrId, '$revision' ); |
| 307 | |
| 308 | if ( is_int( $revisionOrId ) && $revisionOrId <= 0 ) { |
| 309 | throw new HttpError( 400, "Bad revision ID: $revisionOrId" ); |
| 310 | } |
| 311 | |
| 312 | $this->revisionOrId = $revisionOrId; |
| 313 | |
| 314 | if ( $this->getRevisionId() === null ) { |
| 315 | // If we have a RevisionRecord but no revision ID, we are dealing with a fake |
| 316 | // revision used for editor previews or mode switches. The wikitext is coming |
| 317 | // from the request, not the database, so the result is not cacheable for re-use |
| 318 | // by others (though it can be stashed for use by the same client). |
| 319 | $this->isCacheable = false; |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | /** |
| 324 | * Set the content to render. Useful when rendering for previews |
| 325 | * or when switching the editor from source mode to visual mode. |
| 326 | * |
| 327 | * This will create a fake revision for rendering, the revision ID will be 0. |
| 328 | * |
| 329 | * @see setRevision |
| 330 | * @see setContentSource |
| 331 | * |
| 332 | * @param Content $content |
| 333 | */ |
| 334 | public function setContent( Content $content ): void { |
| 335 | $rev = new MutableRevisionRecord( $this->page ); |
| 336 | $rev->setId( 0 ); |
| 337 | $rev->setPageId( $this->page->getId() ); |
| 338 | $rev->setContent( SlotRecord::MAIN, $content ); |
| 339 | $this->setRevision( $rev ); |
| 340 | } |
| 341 | |
| 342 | /** |
| 343 | * Set the content to render. Useful when rendering for previews |
| 344 | * or when switching the editor from source mode to visual mode. |
| 345 | * |
| 346 | * This will create a fake revision for rendering. The revision ID will be 0. |
| 347 | * |
| 348 | * @param string $source The source data, e.g. wikitext |
| 349 | * @param string $model The content model indicating how to interpret $source, e.g. CONTENT_MODEL_WIKITEXT |
| 350 | * |
| 351 | * @see setRevision |
| 352 | * @see setContent |
| 353 | */ |
| 354 | public function setContentSource( string $source, string $model ): void { |
| 355 | try { |
| 356 | $handler = $this->contentHandlerFactory->getContentHandler( $model ); |
| 357 | $content = $handler->unserializeContent( $source ); |
| 358 | $this->setContent( $content ); |
| 359 | } catch ( UnknownContentModelException ) { |
| 360 | throw new LocalizedHttpException( new MessageValue( "rest-bad-content-model", [ $model ] ), 400 ); |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | /** |
| 365 | * This is equivalent to 'pageLanguageOverride' in PageConfigFactory |
| 366 | * For example, when clients call the REST API with the 'content-language' |
| 367 | * header to affect language variant conversion. |
| 368 | * |
| 369 | * @param Bcp47Code|string $pageLanguage the page language, as a Bcp47Code |
| 370 | * or a BCP-47 string. |
| 371 | */ |
| 372 | public function setPageLanguage( $pageLanguage ): void { |
| 373 | if ( is_string( $pageLanguage ) ) { |
| 374 | $pageLanguage = new Bcp47CodeValue( $pageLanguage ); |
| 375 | } |
| 376 | $this->pageLanguage = $pageLanguage; |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * Initializes the helper with the given parameters like the page |
| 381 | * we're dealing with, parameters gotten from the request inputs, |
| 382 | * and the revision if any is available. |
| 383 | * |
| 384 | * @param PageIdentity $page |
| 385 | * @param array $parameters |
| 386 | * @param Authority $authority |
| 387 | * @param RevisionRecord|int|null $revision |
| 388 | * @deprecated since 1.43, use parameters in constructor instead |
| 389 | */ |
| 390 | public function init( |
| 391 | PageIdentity $page, |
| 392 | array $parameters, |
| 393 | Authority $authority, |
| 394 | $revision = null |
| 395 | ) { |
| 396 | wfDeprecated( __METHOD__, '1.43' ); |
| 397 | $this->initInternal( $page, $parameters, $authority, $revision ); |
| 398 | } |
| 399 | |
| 400 | /** |
| 401 | * @param PageIdentity $page |
| 402 | * @param array $parameters |
| 403 | * @param Authority $authority |
| 404 | * @param int|RevisionRecord|null $revision |
| 405 | */ |
| 406 | private function initInternal( |
| 407 | PageIdentity $page, |
| 408 | array $parameters, |
| 409 | Authority $authority, |
| 410 | $revision = null |
| 411 | ) { |
| 412 | $this->page = $page; |
| 413 | $this->authority = $authority; |
| 414 | $this->stash = $parameters['stash'] ?? false; |
| 415 | |
| 416 | if ( $revision !== null ) { |
| 417 | $this->setRevision( $revision ); |
| 418 | } |
| 419 | |
| 420 | if ( $this->stash ) { |
| 421 | $this->setFlavor( 'stash' ); |
| 422 | } else { |
| 423 | $this->setFlavor( $parameters['flavor'] ?? 'view' ); |
| 424 | } |
| 425 | $this->parserOptions ??= ParserOptions::newFromAnon(); |
| 426 | } |
| 427 | |
| 428 | /** |
| 429 | * @inheritDoc |
| 430 | */ |
| 431 | public function setVariantConversionLanguage( |
| 432 | $targetLanguage, |
| 433 | $sourceLanguage = null |
| 434 | ): void { |
| 435 | if ( is_string( $targetLanguage ) ) { |
| 436 | $targetLanguage = $this->getAcceptedTargetLanguage( $targetLanguage ); |
| 437 | $targetLanguage = LanguageCode::normalizeNonstandardCodeAndWarn( |
| 438 | $targetLanguage |
| 439 | ); |
| 440 | } |
| 441 | if ( is_string( $sourceLanguage ) ) { |
| 442 | $sourceLanguage = LanguageCode::normalizeNonstandardCodeAndWarn( |
| 443 | $sourceLanguage |
| 444 | ); |
| 445 | } |
| 446 | $this->targetLanguage = $targetLanguage; |
| 447 | $this->sourceLanguage = $sourceLanguage; |
| 448 | } |
| 449 | |
| 450 | /** |
| 451 | * Get a target language from an accept header |
| 452 | */ |
| 453 | public static function getAcceptedTargetLanguage( string $targetLanguage ): string { |
| 454 | // We could try to identify the most desirable language here, |
| 455 | // following the rules for Accept-Language headers in RFC9100. |
| 456 | // For now, just take the first language code. |
| 457 | |
| 458 | if ( preg_match( '/^\s*([-\w]+)/', $targetLanguage, $m ) ) { |
| 459 | return $m[1]; |
| 460 | } else { |
| 461 | // "undetermined" per RFC5646 |
| 462 | return 'und'; |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | /** |
| 467 | * @inheritDoc |
| 468 | */ |
| 469 | public function getHtml(): ParserOutput { |
| 470 | if ( $this->processedParserOutput ) { |
| 471 | return $this->processedParserOutput; |
| 472 | } |
| 473 | |
| 474 | $parserOutput = $this->getParserOutput(); |
| 475 | |
| 476 | if ( $this->stash ) { |
| 477 | $this->authorizeWriteOrThrow( $this->authority, 'stashbasehtml', $this->page ); |
| 478 | |
| 479 | $isFakeRevision = $this->getRevisionId() === null; |
| 480 | $parsoidStashKey = ParsoidRenderID::newFromParserOutput( $parserOutput ); |
| 481 | $stashSuccess = $this->parsoidOutputStash->set( |
| 482 | $parsoidStashKey, |
| 483 | new SelserContext( |
| 484 | PageBundleParserOutputConverter::htmlPageBundleFromParserOutput( $parserOutput ), |
| 485 | $parsoidStashKey->getRevisionID(), |
| 486 | $isFakeRevision ? $this->revisionOrId->getContent( SlotRecord::MAIN ) : null |
| 487 | ) |
| 488 | ); |
| 489 | if ( !$stashSuccess ) { |
| 490 | $this->statsFactory->getCounter( 'htmloutputrendererhelper_stash_total' ) |
| 491 | ->setLabel( 'status', 'fail' ) |
| 492 | ->increment(); |
| 493 | |
| 494 | $errorData = [ 'parsoid-stash-key' => $parsoidStashKey ]; |
| 495 | LoggerFactory::getInstance( 'HtmlOutputRendererHelper' )->error( |
| 496 | "Parsoid stash failure", |
| 497 | $errorData |
| 498 | ); |
| 499 | throw new LocalizedHttpException( |
| 500 | MessageValue::new( 'rest-html-stash-failure' ), |
| 501 | 500, |
| 502 | $errorData |
| 503 | ); |
| 504 | } |
| 505 | $this->statsFactory->getCounter( 'htmloutputrendererhelper_stash_total' ) |
| 506 | ->setLabel( 'status', 'save' ) |
| 507 | ->increment(); |
| 508 | } |
| 509 | |
| 510 | if ( $this->flavor === 'edit' ) { |
| 511 | $pb = $this->getPageBundle(); |
| 512 | |
| 513 | // Inject data-parsoid and data-mw attributes. |
| 514 | $parserOutput->setContentHolderText( $pb->toInlineAttributeHtml( |
| 515 | siteConfig: $this->parsoidSiteConfig |
| 516 | ) ); |
| 517 | } |
| 518 | |
| 519 | // Check if variant conversion has to be performed |
| 520 | // NOTE: Variant conversion is performed on the fly, and kept outside the stash. |
| 521 | if ( $this->targetLanguage ) { |
| 522 | $languageVariantConverter = $this->htmlTransformFactory->getLanguageVariantConverter( $this->page ); |
| 523 | $parserOutput = $languageVariantConverter->convertParserOutputVariant( |
| 524 | $parserOutput, |
| 525 | $this->targetLanguage, |
| 526 | $this->sourceLanguage |
| 527 | ); |
| 528 | } |
| 529 | |
| 530 | $this->processedParserOutput = $parserOutput; |
| 531 | return $parserOutput; |
| 532 | } |
| 533 | |
| 534 | /** |
| 535 | * @inheritDoc |
| 536 | */ |
| 537 | public function getETag( string $suffix = '' ): ?string { |
| 538 | $parserOutput = $this->getParserOutput(); |
| 539 | |
| 540 | $renderID = ParsoidRenderID::newFromParserOutput( $parserOutput )->getKey(); |
| 541 | |
| 542 | if ( $suffix !== '' ) { |
| 543 | $eTag = "$renderID/{$this->flavor}/$suffix"; |
| 544 | } else { |
| 545 | $eTag = "$renderID/{$this->flavor}"; |
| 546 | } |
| 547 | |
| 548 | if ( $this->targetLanguage ) { |
| 549 | $eTag .= "+lang:{$this->targetLanguage->toBcp47Code()}"; |
| 550 | } |
| 551 | |
| 552 | return "\"{$eTag}\""; |
| 553 | } |
| 554 | |
| 555 | private function isLatest(): bool { |
| 556 | $revId = $this->getRevisionId(); |
| 557 | |
| 558 | if ( $revId === null ) { |
| 559 | return false; // un-saved revision |
| 560 | } |
| 561 | |
| 562 | if ( $revId === 0 ) { |
| 563 | return true; // latest revision |
| 564 | } |
| 565 | |
| 566 | $page = $this->getPageRecord(); |
| 567 | |
| 568 | if ( !$page ) { |
| 569 | return false; // page doesn't exist. shouldn't happen. |
| 570 | } |
| 571 | |
| 572 | return $revId === $page->getLatest(); |
| 573 | } |
| 574 | |
| 575 | /** |
| 576 | * @inheritDoc |
| 577 | */ |
| 578 | public function getLastModified(): ?string { |
| 579 | if ( $this->isLatest() ) { |
| 580 | $page = $this->getPageRecord(); |
| 581 | |
| 582 | // $page should never be null here. |
| 583 | // If it's null, getParserOutput() will fail nicely below. |
| 584 | if ( $page ) { |
| 585 | // Using the touch timestamp for this purpose is in line with |
| 586 | // the behavior of ViewAction::show(). However, |
| 587 | // OutputPage::checkLastModified() applies a lot of additional |
| 588 | // limitations. |
| 589 | return $page->getTouched(); |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | return $this->getParserOutput()->getCacheTime(); |
| 594 | } |
| 595 | |
| 596 | /** |
| 597 | * @inheritDoc |
| 598 | */ |
| 599 | public static function getParamSettings(): array { |
| 600 | return [ |
| 601 | 'stash' => [ |
| 602 | Handler::PARAM_SOURCE => 'query', |
| 603 | ParamValidator::PARAM_TYPE => 'boolean', |
| 604 | ParamValidator::PARAM_DEFAULT => false, |
| 605 | ParamValidator::PARAM_REQUIRED => false, |
| 606 | Handler::PARAM_DESCRIPTION => new MessageValue( 'rest-param-desc-html-output-stash' ) |
| 607 | ], |
| 608 | 'flavor' => [ |
| 609 | Handler::PARAM_SOURCE => 'query', |
| 610 | ParamValidator::PARAM_TYPE => self::OUTPUT_FLAVORS, |
| 611 | ParamValidator::PARAM_DEFAULT => 'view', |
| 612 | ParamValidator::PARAM_REQUIRED => false, |
| 613 | Handler::PARAM_DESCRIPTION => new MessageValue( 'rest-param-desc-html-output-flavor' ) |
| 614 | ], |
| 615 | ]; |
| 616 | } |
| 617 | |
| 618 | private function getDefaultPageLanguage(): Bcp47Code { |
| 619 | // NOTE: keep in sync with Parser::getTargetLanguage! |
| 620 | |
| 621 | // XXX: Inject a TitleFactory just for this?! We need a better way to determine the page language... |
| 622 | $title = Title::castFromPageIdentity( $this->page ); |
| 623 | |
| 624 | if ( $this->parserOptions->getInterfaceMessage() ) { |
| 625 | return $this->parserOptions->getUserLangObj(); |
| 626 | } |
| 627 | |
| 628 | return $title->getPageLanguage(); |
| 629 | } |
| 630 | |
| 631 | // See ParserOptions::optionsHash |
| 632 | private function getDefaultVariant(): Bcp47Code { |
| 633 | $services = MediaWikiServices::getInstance(); |
| 634 | $lang = Title::castFromPageIdentity( $this->page )->getPageLanguage(); |
| 635 | $converter = $services->getLanguageConverterFactory()->getLanguageConverter( $lang ); |
| 636 | return $this->languageFactory->getLanguage( |
| 637 | $converter->getPreferredVariant() |
| 638 | ); |
| 639 | } |
| 640 | |
| 641 | private function getParserOutput(): ParserOutput { |
| 642 | if ( !$this->parserOutput ) { |
| 643 | $this->parserOptions->setRenderReason( __METHOD__ ); |
| 644 | |
| 645 | $defaultLanguage = $this->getDefaultPageLanguage(); |
| 646 | $defaultVariant = $this->getDefaultVariant(); |
| 647 | |
| 648 | if ( $this->pageLanguage |
| 649 | && ( !$this->pageLanguage->isSameCodeAs( $defaultLanguage ) || |
| 650 | // T418549: if we're asking for the base but the URL |
| 651 | // specifies a variant, we need to fork the cache |
| 652 | // T267067 should fix this properly. |
| 653 | !$this->pageLanguage->isSameCodeAs( $defaultVariant ) ) |
| 654 | ) { |
| 655 | $languageObj = $this->languageFactory->getLanguage( $this->pageLanguage ); |
| 656 | $this->parserOptions->setTargetLanguage( $languageObj ); |
| 657 | // Ensure target language splits the parser cache, when |
| 658 | // non-default; targetLanguage is not in |
| 659 | // ParserOptions::$cacheVaryingOptionsHash for the legacy |
| 660 | // parser. |
| 661 | $this->parserOptions->addExtraKey( 'target=' . $languageObj->getCode() ); |
| 662 | } |
| 663 | |
| 664 | try { |
| 665 | $status = $this->getParserOutputInternal(); |
| 666 | } catch ( RevisionAccessException $e ) { |
| 667 | throw new LocalizedHttpException( |
| 668 | MessageValue::new( 'rest-nonexistent-title' ), |
| 669 | 404, |
| 670 | [ 'reason' => $e->getMessage() ] |
| 671 | ); |
| 672 | } |
| 673 | |
| 674 | if ( !$status->isOK() ) { |
| 675 | if ( $status->hasMessage( 'parsoid-client-error' ) ) { |
| 676 | $this->throwExceptionForStatus( $status, 'rest-html-backend-error', 400 ); |
| 677 | } elseif ( $status->hasMessage( 'parsoid-resource-limit-exceeded' ) ) { |
| 678 | $this->throwExceptionForStatus( $status, 'rest-resource-limit-exceeded', 413 ); |
| 679 | } elseif ( $status->hasMessage( 'missing-revision-permission' ) ) { |
| 680 | $this->throwExceptionForStatus( $status, 'rest-permission-denied-revision', 403 ); |
| 681 | } elseif ( $status->hasMessage( 'parsoid-revision-access' ) ) { |
| 682 | $this->throwExceptionForStatus( $status, 'rest-specified-revision-unavailable', 404 ); |
| 683 | } else { |
| 684 | $this->logStatusError( $status, 'Parsoid backend error', 'HtmlOutputRendererHelper' ); |
| 685 | $this->throwExceptionForStatus( $status, 'rest-html-backend-error', 500 ); |
| 686 | } |
| 687 | } |
| 688 | |
| 689 | $this->parserOutput = $status->getValue(); |
| 690 | } |
| 691 | |
| 692 | Assert::invariant( $this->parserOutput->getRenderId() !== null, "no render id" ); |
| 693 | return $this->parserOutput; |
| 694 | } |
| 695 | |
| 696 | /** |
| 697 | * The content language of the HTML output after parsing. |
| 698 | * |
| 699 | * @return Bcp47Code The language, as a BCP-47 code |
| 700 | */ |
| 701 | public function getHtmlOutputContentLanguage(): Bcp47Code { |
| 702 | $contentLanguage = $this->getHtml()->getLanguage(); |
| 703 | |
| 704 | // This shouldn't happen, but don't crash if it does: |
| 705 | if ( !$contentLanguage ) { |
| 706 | if ( $this->pageLanguage ) { |
| 707 | LoggerFactory::getInstance( 'HtmlOutputRendererHelper' )->warning( |
| 708 | "ParserOutput does not specify a language" |
| 709 | ); |
| 710 | |
| 711 | $contentLanguage = $this->pageLanguage; |
| 712 | } else { |
| 713 | LoggerFactory::getInstance( 'HtmlOutputRendererHelper' )->warning( |
| 714 | "ParserOutput does not specify a language and no page language set in helper.", |
| 715 | // (T387453) Add a stack trace to help debug the sources of this issue |
| 716 | [ 'fauxerror' => new RuntimeException( 'Dummy error for a trace' ) ] |
| 717 | ); |
| 718 | |
| 719 | $title = Title::newFromPageIdentity( $this->page ); |
| 720 | $contentLanguage = $title->getPageLanguage(); |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | return $contentLanguage; |
| 725 | } |
| 726 | |
| 727 | /** |
| 728 | * @inheritDoc |
| 729 | */ |
| 730 | public function putHeaders( ResponseInterface $response, bool $forHtml = true ): void { |
| 731 | if ( $forHtml ) { |
| 732 | // For HTML, we want to set the Content-Language. For JSON, we probably don't. |
| 733 | $response->setHeader( 'Content-Language', $this->getHtmlOutputContentLanguage()->toBcp47Code() ); |
| 734 | |
| 735 | $pb = $this->getPageBundle(); |
| 736 | ParsoidFormatHelper::setContentType( $response, ParsoidFormatHelper::FORMAT_HTML, $pb->version ); |
| 737 | } |
| 738 | |
| 739 | if ( $this->targetLanguage ) { |
| 740 | $response->addHeader( 'Vary', 'Accept-Language' ); |
| 741 | } |
| 742 | |
| 743 | // XXX: if Parsoid returns Vary headers, set them here?! |
| 744 | |
| 745 | if ( !$this->isCacheable ) { |
| 746 | $response->setHeader( 'Cache-Control', 'private,no-cache,s-maxage=0' ); |
| 747 | } |
| 748 | |
| 749 | // TODO: cache control for stable HTML? See ContentHelper::setCacheControl |
| 750 | |
| 751 | if ( $this->getRevisionId() ) { |
| 752 | $response->setHeader( 'Content-Revision-Id', (string)$this->getRevisionId() ); |
| 753 | } |
| 754 | } |
| 755 | |
| 756 | /** |
| 757 | * Returns the rendered HTML as a HtmlPageBundle object. |
| 758 | */ |
| 759 | public function getPageBundle(): HtmlPageBundle { |
| 760 | // XXX: converting between HtmlPageBundle and ParserOutput is inefficient! |
| 761 | $parserOutput = $this->getParserOutput(); |
| 762 | $pb = PageBundleParserOutputConverter::htmlPageBundleFromParserOutput( $parserOutput ); |
| 763 | |
| 764 | // Check if variant conversion has to be performed |
| 765 | // NOTE: Variant conversion is performed on the fly, and kept outside the stash. |
| 766 | if ( $this->targetLanguage ) { |
| 767 | $languageVariantConverter = $this->htmlTransformFactory->getLanguageVariantConverter( $this->page ); |
| 768 | $pb = $languageVariantConverter->convertPageBundleVariant( |
| 769 | $pb, |
| 770 | $this->targetLanguage, |
| 771 | $this->sourceLanguage |
| 772 | ); |
| 773 | } |
| 774 | |
| 775 | return $pb; |
| 776 | } |
| 777 | |
| 778 | /** |
| 779 | * Returns the ID of the revision that is being rendered. |
| 780 | * |
| 781 | * This will return 0 if no revision has been specified, so the current revision |
| 782 | * will be rendered. |
| 783 | * |
| 784 | * This wil return null if RevisionRecord has been set but that RevisionRecord |
| 785 | * does not have a revision ID, e.g. when rendering a preview. |
| 786 | */ |
| 787 | public function getRevisionId(): ?int { |
| 788 | if ( !$this->revisionOrId ) { |
| 789 | // If we don't have a revision set, or it's 0, we are rendering the current revision. |
| 790 | return 0; |
| 791 | } |
| 792 | |
| 793 | if ( $this->revisionOrId instanceof RevisionRecord ) { |
| 794 | // NOTE: return null even if getId() gave us 0 |
| 795 | return $this->revisionOrId->getId() ?: null; |
| 796 | } |
| 797 | |
| 798 | // It's a revision ID, just return it |
| 799 | return (int)$this->revisionOrId; |
| 800 | } |
| 801 | |
| 802 | /** |
| 803 | * Strip Parsoid's section wrappers |
| 804 | * |
| 805 | * TODO: Should we move this to Parsoid's ContentUtils class? |
| 806 | * There already is a stripUnnecessaryWrappersAndSyntheticNodes but |
| 807 | * it targets html2wt and does a lot more than just section unwrapping. |
| 808 | */ |
| 809 | private function stripParsoidSectionTags( DocumentFragment|Element $elt ): void { |
| 810 | $n = $elt->firstChild; |
| 811 | while ( $n ) { |
| 812 | $next = $n->nextSibling; |
| 813 | if ( $n instanceof Element ) { |
| 814 | // Recurse into subtree before stripping this |
| 815 | $this->stripParsoidSectionTags( $n ); |
| 816 | // Strip <section> tags and synthetic extended-annotation-region wrappers |
| 817 | if ( WTUtils::isParsoidSectionTag( $n ) ) { |
| 818 | $parent = $n->parentNode; |
| 819 | // Help out phan |
| 820 | '@phan-var Element $parent'; |
| 821 | DOMUtils::migrateChildren( $n, $parent, $n ); |
| 822 | $parent->removeChild( $n ); |
| 823 | } |
| 824 | } |
| 825 | $n = $next; |
| 826 | } |
| 827 | } |
| 828 | |
| 829 | /** |
| 830 | * Returns the page record, or null if no page is known or the page does not exist. |
| 831 | * |
| 832 | * @return PageRecord|null |
| 833 | */ |
| 834 | private function getPageRecord(): ?PageRecord { |
| 835 | if ( $this->page === null ) { |
| 836 | return null; |
| 837 | } |
| 838 | |
| 839 | if ( !$this->page instanceof PageRecord ) { |
| 840 | $page = $this->pageLookup->getPageByReference( $this->page ); |
| 841 | if ( !$page ) { |
| 842 | return null; |
| 843 | } |
| 844 | |
| 845 | $this->page = $page; |
| 846 | } |
| 847 | |
| 848 | return $this->page; |
| 849 | } |
| 850 | |
| 851 | private function getParserOutputInternal(): Status { |
| 852 | // NOTE: ParserOutputAccess::getParserOutput() should be used for revisions |
| 853 | // that come from the database. Either this revision is null to indicate |
| 854 | // the current revision or the revision must have an ID. |
| 855 | // If we have a revision and the ID is 0 or null, then it's a fake revision |
| 856 | // representing a preview. |
| 857 | $parsoidOptions = $this->parsoidOptions; |
| 858 | |
| 859 | if ( $this->getRevisionId() === null ) { |
| 860 | $this->isCacheable = false; |
| 861 | } |
| 862 | |
| 863 | $parserOutputAccessOptions = [ |
| 864 | // Use pool counter (T387478). |
| 865 | // Use it even if the output is not cacheable, to protect against |
| 866 | // load spikes. |
| 867 | ParserOutputAccess::OPT_POOL_COUNTER => |
| 868 | ParserOutputAccess::POOL_COUNTER_REST_API |
| 869 | ]; |
| 870 | |
| 871 | // Find page |
| 872 | $pageRecord = $this->getPageRecord(); |
| 873 | $revision = $this->revisionOrId; |
| 874 | |
| 875 | // NOTE: If we have a RevisionRecord already and this is |
| 876 | // not cacheable, just use it, there is no need to |
| 877 | // resolve $page to a PageRecord (and it may not be |
| 878 | // possible if the page doesn't exist). |
| 879 | if ( $this->isCacheable ) { |
| 880 | if ( !$pageRecord ) { |
| 881 | if ( $this->page ) { |
| 882 | throw new RevisionAccessException( |
| 883 | 'Page {name} not found', |
| 884 | [ 'name' => "{$this->page}" ] |
| 885 | ); |
| 886 | } else { |
| 887 | throw new RevisionAccessException( "No page" ); |
| 888 | } |
| 889 | } |
| 890 | |
| 891 | $revision ??= $pageRecord->getLatest(); |
| 892 | |
| 893 | if ( is_int( $revision ) ) { |
| 894 | $revId = $revision; |
| 895 | $revision = $this->revisionLookup->getRevisionById( $revId ); |
| 896 | |
| 897 | if ( !$revision ) { |
| 898 | throw new RevisionAccessException( |
| 899 | 'Revision {revId} not found', |
| 900 | [ 'revId' => $revId ] |
| 901 | ); |
| 902 | } |
| 903 | } |
| 904 | |
| 905 | if ( $pageRecord->getId() !== $revision->getPageId() ) { |
| 906 | if ( $this->lenientRevHandling ) { |
| 907 | $pageRecord = $this->pageLookup->getPageById( $revision->getPageId() ); |
| 908 | if ( !$pageRecord ) { |
| 909 | // This should ideally never trigger! |
| 910 | throw new \RuntimeException( |
| 911 | "Unexpected NULL page for pageid " . $revision->getPageId() . |
| 912 | " from revision " . $revision->getId() |
| 913 | ); |
| 914 | } |
| 915 | // Don't cache this! |
| 916 | $parserOutputAccessOptions[ ParserOutputAccess::OPT_NO_UPDATE_CACHE ] = true; |
| 917 | } else { |
| 918 | throw new RevisionAccessException( |
| 919 | 'Revision {revId} does not belong to page {name}', |
| 920 | [ 'name' => $pageRecord->getDBkey(), 'revId' => $revision->getId() ] |
| 921 | ); |
| 922 | } |
| 923 | } |
| 924 | } |
| 925 | |
| 926 | $contentModel = $revision->getMainContentModel(); |
| 927 | if ( $this->parsoidSiteConfig->supportsContentModel( $contentModel ) ) { |
| 928 | $this->parserOptions->setUseParsoid(); |
| 929 | } |
| 930 | if ( $this->isCacheable ) { |
| 931 | // phan can't tell that we must have used the block above to |
| 932 | // resolve $pageRecord to a PageRecord if we've made it to this block. |
| 933 | '@phan-var PageRecord $pageRecord'; |
| 934 | try { |
| 935 | $status = $this->parserOutputAccess->getParserOutput( |
| 936 | $pageRecord, $this->parserOptions, $revision, $parserOutputAccessOptions |
| 937 | ); |
| 938 | } catch ( ClientError $e ) { |
| 939 | $status = Status::newFatal( 'parsoid-client-error', $e->getMessage() ); |
| 940 | } catch ( ResourceLimitExceededException $e ) { |
| 941 | $status = Status::newFatal( 'parsoid-resource-limit-exceeded', $e->getMessage() ); |
| 942 | } |
| 943 | } else { |
| 944 | '@phan-var RevisionRecord $revision'; |
| 945 | $status = $this->parseUncacheable( $revision ); |
| 946 | } |
| 947 | if ( $status->isOK() && $this->flavor === 'fragment' ) { |
| 948 | // Unwrap sections and return body_only content |
| 949 | // NOTE: This introduces an extra html -> dom -> html roundtrip |
| 950 | // This will get addressed once HtmlHolder work is complete |
| 951 | $parserOutput = $status->getValue(); |
| 952 | $body = $parserOutput->getContentHolder()->getAsDom( |
| 953 | ContentHolder::BODY_FRAGMENT |
| 954 | ); |
| 955 | '@phan-var DocumentFragment $body'; |
| 956 | $this->stripParsoidSectionTags( $body ); |
| 957 | } |
| 958 | Assert::invariant( $status->isOK() ? $status->getValue()->getRenderId() !== null : true, "no render id" ); |
| 959 | return $status; |
| 960 | } |
| 961 | |
| 962 | // See ParserOutputAccess::renderRevision() -- but of course this method |
| 963 | // bypasses any caching. |
| 964 | private function parseUncacheable( RevisionRecord $revision ): Status { |
| 965 | // Enforce caller expectation |
| 966 | $revId = $revision->getId(); |
| 967 | if ( $revId !== 0 && $revId !== null ) { |
| 968 | return Status::newFatal( 'parsoid-revision-access', |
| 969 | "parseUncacheable should not be called for a real revision" ); |
| 970 | } |
| 971 | try { |
| 972 | $renderedRev = $this->revisionRenderer->getRenderedRevision( |
| 973 | $revision, |
| 974 | $this->parserOptions, |
| 975 | // ParserOutputAccess uses 'null' for the authority and |
| 976 | // 'audience' => RevisionRecord::RAW, presumably because |
| 977 | // the access checks are already handled by the |
| 978 | // RestAuthorizeTrait |
| 979 | $this->authority, |
| 980 | [ 'audience' => RevisionRecord::RAW ] |
| 981 | ); |
| 982 | if ( $renderedRev === null ) { |
| 983 | return Status::newFatal( 'parsoid-revision-access' ); |
| 984 | } |
| 985 | $parserOutput = $renderedRev->getRevisionParserOutput(); |
| 986 | // Ensure this isn't accidentally cached |
| 987 | $parserOutput->updateCacheExpiry( 0, 'uncacheable-render' ); |
| 988 | return Status::newGood( $parserOutput ); |
| 989 | } catch ( ClientError $e ) { |
| 990 | return Status::newFatal( 'parsoid-client-error', $e->getMessage() ); |
| 991 | } catch ( ResourceLimitExceededException $e ) { |
| 992 | return Status::newFatal( 'parsoid-resource-limit-exceeded', $e->getMessage() ); |
| 993 | } |
| 994 | } |
| 995 | |
| 996 | public function isParsoidContent(): bool { |
| 997 | return PageBundleParserOutputConverter::hasPageBundle( |
| 998 | $this->getParserOutput() |
| 999 | ); |
| 1000 | } |
| 1001 | |
| 1002 | } |