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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Rest\Handler; |
| 4 | |
| 5 | use LogicException; |
| 6 | use MediaWiki\Page\PageReference; |
| 7 | use MediaWiki\Rest\Handler\Helper\PageContentHelper; |
| 8 | use MediaWiki\Rest\Handler\Helper\PageRedirectHelper; |
| 9 | use MediaWiki\Rest\Handler\Helper\PageRestHelperFactory; |
| 10 | use MediaWiki\Rest\LocalizedHttpException; |
| 11 | use MediaWiki\Rest\Response; |
| 12 | use MediaWiki\Rest\SimpleHandler; |
| 13 | use MediaWiki\Title\TitleFormatter; |
| 14 | use Wikimedia\Message\MessageValue; |
| 15 | |
| 16 | /** |
| 17 | * Handler class for Core REST API Page Source endpoint with the following routes: |
| 18 | * - /page/{title} |
| 19 | * - /page/{title}/bare |
| 20 | */ |
| 21 | class PageSourceHandler extends SimpleHandler { |
| 22 | |
| 23 | private TitleFormatter $titleFormatter; |
| 24 | private PageRestHelperFactory $helperFactory; |
| 25 | private PageContentHelper $contentHelper; |
| 26 | |
| 27 | public function __construct( |
| 28 | TitleFormatter $titleFormatter, |
| 29 | PageRestHelperFactory $helperFactory |
| 30 | ) { |
| 31 | $this->titleFormatter = $titleFormatter; |
| 32 | $this->contentHelper = $helperFactory->newPageContentHelper(); |
| 33 | $this->helperFactory = $helperFactory; |
| 34 | } |
| 35 | |
| 36 | private function getRedirectHelper(): PageRedirectHelper { |
| 37 | return $this->helperFactory->newPageRedirectHelper( |
| 38 | $this->getResponseFactory(), |
| 39 | $this->getRouter(), |
| 40 | $this->getPath(), |
| 41 | $this->getRequest() |
| 42 | ); |
| 43 | } |
| 44 | |
| 45 | protected function postValidationSetup() { |
| 46 | $this->contentHelper->init( $this->getAuthority(), $this->getValidatedParams() ); |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * @param PageReference $page |
| 51 | * @return string |
| 52 | */ |
| 53 | private function constructHtmlUrl( PageReference $page ): string { |
| 54 | return $this->getRouter()->getRouteUrl( |
| 55 | '/v1/page/{title}/html', |
| 56 | [ 'title' => $this->titleFormatter->getPrefixedText( $page ) ] |
| 57 | ); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * @return Response |
| 62 | * @throws LocalizedHttpException |
| 63 | */ |
| 64 | public function run(): Response { |
| 65 | $this->contentHelper->checkAccess(); |
| 66 | $page = $this->contentHelper->getPageIdentity(); |
| 67 | |
| 68 | if ( !$page->exists() ) { |
| 69 | // We may get here for "known" but non-existing pages, such as |
| 70 | // message pages. Since there is no page, we should still return |
| 71 | // a 404. See T349677 for discussion. |
| 72 | $titleText = $this->contentHelper->getTitleText() ?? '(unknown)'; |
| 73 | throw new LocalizedHttpException( |
| 74 | MessageValue::new( 'rest-nonexistent-title' ) |
| 75 | ->plaintextParams( $titleText ), |
| 76 | 404 |
| 77 | ); |
| 78 | } |
| 79 | |
| 80 | $redirectHelper = $this->getRedirectHelper(); |
| 81 | |
| 82 | '@phan-var \MediaWiki\Page\ExistingPageRecord $page'; |
| 83 | $redirectResponse = $redirectHelper->createNormalizationRedirectResponseIfNeeded( |
| 84 | $page, |
| 85 | $this->contentHelper->getTitleText() |
| 86 | ); |
| 87 | |
| 88 | if ( $redirectResponse !== null ) { |
| 89 | return $redirectResponse; |
| 90 | } |
| 91 | |
| 92 | $outputMode = $this->getOutputMode(); |
| 93 | switch ( $outputMode ) { |
| 94 | case 'bare': |
| 95 | $body = $this->contentHelper->constructMetadata(); |
| 96 | $body['html_url'] = $this->constructHtmlUrl( $page ); |
| 97 | break; |
| 98 | case 'source': |
| 99 | $content = $this->contentHelper->getContent(); |
| 100 | $body = $this->contentHelper->constructMetadata(); |
| 101 | $body['source'] = $content->getText(); |
| 102 | break; |
| 103 | default: |
| 104 | throw new LogicException( "Unknown HTML type $outputMode" ); |
| 105 | } |
| 106 | |
| 107 | // If param redirect=no is present, that means this page can be a redirect |
| 108 | // check for a redirectTargetUrl and send it to the body as `redirect_target` |
| 109 | '@phan-var \MediaWiki\Page\ExistingPageRecord $page'; |
| 110 | $redirectTargetUrl = $redirectHelper->getWikiRedirectTargetUrl( $page ); |
| 111 | |
| 112 | if ( $redirectTargetUrl ) { |
| 113 | $body['redirect_target'] = $redirectTargetUrl; |
| 114 | } |
| 115 | |
| 116 | $response = $this->getResponseFactory()->createJson( $body ); |
| 117 | $this->contentHelper->setCacheControl( $response ); |
| 118 | |
| 119 | return $response; |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Returns an ETag representing a page's source. The ETag assumes a page's source has changed |
| 124 | * if the latest revision of a page has been made private, un-readable for another reason, |
| 125 | * or a newer revision exists. |
| 126 | * @return string|null |
| 127 | */ |
| 128 | protected function getETag(): ?string { |
| 129 | return $this->contentHelper->getETag(); |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * @return string|null |
| 134 | */ |
| 135 | protected function getLastModified(): ?string { |
| 136 | return $this->contentHelper->getLastModified(); |
| 137 | } |
| 138 | |
| 139 | private function getOutputMode(): string { |
| 140 | return $this->getConfig()['format']; |
| 141 | } |
| 142 | |
| 143 | public function needsWriteAccess(): bool { |
| 144 | return false; |
| 145 | } |
| 146 | |
| 147 | public function getParamSettings(): array { |
| 148 | return $this->contentHelper->getParamSettings(); |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * @return bool |
| 153 | */ |
| 154 | protected function hasRepresentation() { |
| 155 | return $this->contentHelper->hasContent(); |
| 156 | } |
| 157 | } |