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| 1 | <?php |
| 2 | /** |
| 3 | * Implements Special:GoToInterwiki |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 18 | * http://www.gnu.org/copyleft/gpl.html |
| 19 | * |
| 20 | * @file |
| 21 | * @ingroup SpecialPage |
| 22 | */ |
| 23 | |
| 24 | namespace MediaWiki\Specials; |
| 25 | |
| 26 | use MediaWiki\SpecialPage\UnlistedSpecialPage; |
| 27 | use MediaWiki\Title\Title; |
| 28 | |
| 29 | /** |
| 30 | * Landing page for non-local interwiki links. |
| 31 | * |
| 32 | * This exists for security and privacy reasons. |
| 33 | * |
| 34 | * The landing page warns people and obtains consent before leaving |
| 35 | * the site and visiting a third-party website. This can reduce |
| 36 | * impact of phishing tricks as well. |
| 37 | * |
| 38 | * This is meant to be used as the replacement URL when resolving |
| 39 | * an interwiki link things in a context where it would be |
| 40 | * navigated to without clear consent. For example, when doing |
| 41 | * a simple search (not "advanced") in which we would normally |
| 42 | * redirect to the first result if there is an exact match |
| 43 | * (e.g. Special:Search/google:foo). |
| 44 | * |
| 45 | * This is not needed for external interwiki links in content, |
| 46 | * e.g. [[google:foo]] in parser output may link directly. |
| 47 | * |
| 48 | * Further context at https://phabricator.wikimedia.org/T122209. |
| 49 | * |
| 50 | * @ingroup SpecialPage |
| 51 | */ |
| 52 | class SpecialGoToInterwiki extends UnlistedSpecialPage { |
| 53 | public function __construct() { |
| 54 | parent::__construct( 'GoToInterwiki' ); |
| 55 | } |
| 56 | |
| 57 | public function execute( $par ) { |
| 58 | $par ??= ''; |
| 59 | |
| 60 | // Allow forcing an interstitial for local interwikis. This is used |
| 61 | // when a redirect page is reached via a special page which resolves |
| 62 | // to a user-dependent value (as defined by |
| 63 | // RedirectSpecialPage::personallyIdentifiableTarget). See the hack |
| 64 | // for avoiding T109724 in MediaWiki::performRequest (which also |
| 65 | // explains why we can't use a query parameter instead). |
| 66 | $force = str_starts_with( $par, 'force/' ); |
| 67 | if ( $force ) { |
| 68 | $par = substr( $par, 6 ); |
| 69 | } |
| 70 | |
| 71 | $this->setHeaders(); |
| 72 | $target = Title::newFromText( $par ); |
| 73 | // Disallow special pages as a precaution against |
| 74 | // possible redirect loops. |
| 75 | if ( !$target || $target->isSpecialPage() ) { |
| 76 | $this->getOutput()->setStatusCode( 404 ); |
| 77 | $this->getOutput()->addWikiMsg( 'gotointerwiki-invalid' ); |
| 78 | return; |
| 79 | } |
| 80 | |
| 81 | $url = $target->getFullURL(); |
| 82 | if ( !$target->isExternal() || ( $target->isLocal() && !$force ) ) { |
| 83 | // Either a normal page, or a local interwiki. |
| 84 | // Just redirect. |
| 85 | $this->getOutput()->redirect( $url, '301' ); |
| 86 | } else { |
| 87 | $this->getOutput()->addWikiMsg( |
| 88 | 'gotointerwiki-external', |
| 89 | $url, |
| 90 | $target->getFullText() |
| 91 | ); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * @return bool |
| 97 | */ |
| 98 | public function requiresWrite() { |
| 99 | return false; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * @return string |
| 104 | */ |
| 105 | protected function getGroupName() { |
| 106 | return 'redirects'; |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | /** @deprecated class alias since 1.41 */ |
| 111 | class_alias( SpecialGoToInterwiki::class, 'SpecialGoToInterwiki' ); |