3 * MediaWiki page data importer.
5 * Copyright © 2003,2005 Brion Vibber <brion@pobox.com>
6 * https://www.mediawiki.org/
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
21 * http://www.gnu.org/copyleft/gpl.html
24 * @ingroup SpecialPage
28 * XML file reader for the page data importer
30 * implements Special:Import
31 * @ingroup SpecialPage
34 private $reader = null;
35 private $foreignNamespaces = null;
36 private $mLogItemCallback, $mUploadCallback, $mRevisionCallback, $mPageCallback;
37 private $mSiteInfoCallback, $mPageOutCallback;
38 private $mNoticeCallback, $mDebug;
39 private $mImportUploads, $mImageBasePath;
40 private $mNoUpdates = false;
43 /** @var ImportTitleFactory */
44 private $importTitleFactory;
46 private $countableCache = array();
49 * Creates an ImportXMLReader drawing from the source provided
50 * @param ImportSource $source
51 * @param Config $config
54 function __construct( ImportSource
$source, Config
$config = null ) {
55 if ( !class_exists( 'XMLReader' ) ) {
56 throw new Exception( 'Import requires PHP to have been compiled with libxml support' );
59 $this->reader
= new XMLReader();
61 wfDeprecated( __METHOD__
. ' without a Config instance', '1.25' );
62 $config = ConfigFactory
::getDefaultInstance()->makeConfig( 'main' );
64 $this->config
= $config;
66 if ( !in_array( 'uploadsource', stream_get_wrappers() ) ) {
67 stream_wrapper_register( 'uploadsource', 'UploadSourceAdapter' );
69 $id = UploadSourceAdapter
::registerSource( $source );
71 // Enable the entity loader, as it is needed for loading external URLs via
72 // XMLReader::open (T86036)
73 $oldDisable = libxml_disable_entity_loader( false );
74 if ( defined( 'LIBXML_PARSEHUGE' ) ) {
75 $status = $this->reader
->open( "uploadsource://$id", null, LIBXML_PARSEHUGE
);
77 $status = $this->reader
->open( "uploadsource://$id" );
80 $error = libxml_get_last_error();
81 libxml_disable_entity_loader( $oldDisable );
82 throw new MWException( 'Encountered an internal error while initializing WikiImporter object: ' .
85 libxml_disable_entity_loader( $oldDisable );
88 $this->setPageCallback( array( $this, 'beforeImportPage' ) );
89 $this->setRevisionCallback( array( $this, "importRevision" ) );
90 $this->setUploadCallback( array( $this, 'importUpload' ) );
91 $this->setLogItemCallback( array( $this, 'importLogItem' ) );
92 $this->setPageOutCallback( array( $this, 'finishImportPage' ) );
94 $this->importTitleFactory
= new NaiveImportTitleFactory();
98 * @return null|XMLReader
100 public function getReader() {
101 return $this->reader
;
104 public function throwXmlError( $err ) {
105 $this->debug( "FAILURE: $err" );
106 wfDebug( "WikiImporter XML error: $err\n" );
109 public function debug( $data ) {
110 if ( $this->mDebug
) {
111 wfDebug( "IMPORT: $data\n" );
115 public function warn( $data ) {
116 wfDebug( "IMPORT: $data\n" );
119 public function notice( $msg /*, $param, ...*/ ) {
120 $params = func_get_args();
121 array_shift( $params );
123 if ( is_callable( $this->mNoticeCallback
) ) {
124 call_user_func( $this->mNoticeCallback
, $msg, $params );
125 } else { # No ImportReporter -> CLI
126 echo wfMessage( $msg, $params )->text() . "\n";
134 function setDebug( $debug ) {
135 $this->mDebug
= $debug;
139 * Set 'no updates' mode. In this mode, the link tables will not be updated by the importer
140 * @param bool $noupdates
142 function setNoUpdates( $noupdates ) {
143 $this->mNoUpdates
= $noupdates;
147 * Set a callback that displays notice messages
149 * @param callable $callback
152 public function setNoticeCallback( $callback ) {
153 return wfSetVar( $this->mNoticeCallback
, $callback );
157 * Sets the action to perform as each new page in the stream is reached.
158 * @param callable $callback
161 public function setPageCallback( $callback ) {
162 $previous = $this->mPageCallback
;
163 $this->mPageCallback
= $callback;
168 * Sets the action to perform as each page in the stream is completed.
169 * Callback accepts the page title (as a Title object), a second object
170 * with the original title form (in case it's been overridden into a
171 * local namespace), and a count of revisions.
173 * @param callable $callback
176 public function setPageOutCallback( $callback ) {
177 $previous = $this->mPageOutCallback
;
178 $this->mPageOutCallback
= $callback;
183 * Sets the action to perform as each page revision is reached.
184 * @param callable $callback
187 public function setRevisionCallback( $callback ) {
188 $previous = $this->mRevisionCallback
;
189 $this->mRevisionCallback
= $callback;
194 * Sets the action to perform as each file upload version is reached.
195 * @param callable $callback
198 public function setUploadCallback( $callback ) {
199 $previous = $this->mUploadCallback
;
200 $this->mUploadCallback
= $callback;
205 * Sets the action to perform as each log item reached.
206 * @param callable $callback
209 public function setLogItemCallback( $callback ) {
210 $previous = $this->mLogItemCallback
;
211 $this->mLogItemCallback
= $callback;
216 * Sets the action to perform when site info is encountered
217 * @param callable $callback
220 public function setSiteInfoCallback( $callback ) {
221 $previous = $this->mSiteInfoCallback
;
222 $this->mSiteInfoCallback
= $callback;
227 * Sets the factory object to use to convert ForeignTitle objects into local
229 * @param ImportTitleFactory $factory
231 public function setImportTitleFactory( $factory ) {
232 $this->importTitleFactory
= $factory;
236 * Set a target namespace to override the defaults
237 * @param null|int $namespace
240 public function setTargetNamespace( $namespace ) {
241 if ( is_null( $namespace ) ) {
242 // Don't override namespaces
243 $this->setImportTitleFactory( new NaiveImportTitleFactory() );
247 MWNamespace
::exists( intval( $namespace ) )
249 $namespace = intval( $namespace );
250 $this->setImportTitleFactory( new NamespaceImportTitleFactory( $namespace ) );
258 * Set a target root page under which all pages are imported
259 * @param null|string $rootpage
262 public function setTargetRootPage( $rootpage ) {
263 $status = Status
::newGood();
264 if ( is_null( $rootpage ) ) {
266 $this->setImportTitleFactory( new NaiveImportTitleFactory() );
267 } elseif ( $rootpage !== '' ) {
268 $rootpage = rtrim( $rootpage, '/' ); // avoid double slashes
269 $title = Title
::newFromText( $rootpage );
271 if ( !$title ||
$title->isExternal() ) {
272 $status->fatal( 'import-rootpage-invalid' );
274 if ( !MWNamespace
::hasSubpages( $title->getNamespace() ) ) {
277 $displayNSText = $title->getNamespace() == NS_MAIN
278 ?
wfMessage( 'blanknamespace' )->text()
279 : $wgContLang->getNsText( $title->getNamespace() );
280 $status->fatal( 'import-rootpage-nosubpage', $displayNSText );
282 // set namespace to 'all', so the namespace check in processTitle() can pass
283 $this->setTargetNamespace( null );
284 $this->setImportTitleFactory( new SubpageImportTitleFactory( $title ) );
294 public function setImageBasePath( $dir ) {
295 $this->mImageBasePath
= $dir;
299 * @param bool $import
301 public function setImportUploads( $import ) {
302 $this->mImportUploads
= $import;
306 * Default per-page callback. Sets up some things related to site statistics
307 * @param array $titleAndForeignTitle Two-element array, with Title object at
308 * index 0 and ForeignTitle object at index 1
311 public function beforeImportPage( $titleAndForeignTitle ) {
312 $title = $titleAndForeignTitle[0];
313 $page = WikiPage
::factory( $title );
314 $this->countableCache
['title_' . $title->getPrefixedText()] = $page->isCountable();
319 * Default per-revision callback, performs the import.
320 * @param WikiRevision $revision
323 public function importRevision( $revision ) {
324 if ( !$revision->getContentHandler()->canBeUsedOn( $revision->getTitle() ) ) {
325 $this->notice( 'import-error-bad-location',
326 $revision->getTitle()->getPrefixedText(),
328 $revision->getModel(),
329 $revision->getFormat() );
335 $dbw = wfGetDB( DB_MASTER
);
336 return $dbw->deadlockLoop( array( $revision, 'importOldRevision' ) );
337 } catch ( MWContentSerializationException
$ex ) {
338 $this->notice( 'import-error-unserialize',
339 $revision->getTitle()->getPrefixedText(),
341 $revision->getModel(),
342 $revision->getFormat() );
349 * Default per-revision callback, performs the import.
350 * @param WikiRevision $revision
353 public function importLogItem( $revision ) {
354 $dbw = wfGetDB( DB_MASTER
);
355 return $dbw->deadlockLoop( array( $revision, 'importLogItem' ) );
360 * @param WikiRevision $revision
363 public function importUpload( $revision ) {
364 $dbw = wfGetDB( DB_MASTER
);
365 return $dbw->deadlockLoop( array( $revision, 'importUpload' ) );
369 * Mostly for hook use
370 * @param Title $title
371 * @param ForeignTitle $foreignTitle
372 * @param int $revCount
373 * @param int $sRevCount
374 * @param array $pageInfo
377 public function finishImportPage( $title, $foreignTitle, $revCount,
378 $sRevCount, $pageInfo ) {
380 // Update article count statistics (T42009)
381 // The normal counting logic in WikiPage->doEditUpdates() is designed for
382 // one-revision-at-a-time editing, not bulk imports. In this situation it
383 // suffers from issues of slave lag. We let WikiPage handle the total page
384 // and revision count, and we implement our own custom logic for the
385 // article (content page) count.
386 $page = WikiPage
::factory( $title );
387 $page->loadPageData( 'fromdbmaster' );
388 $content = $page->getContent();
389 if ( $content === null ) {
390 wfDebug( __METHOD__
. ': Skipping article count adjustment for ' . $title .
391 ' because WikiPage::getContent() returned null' );
393 $editInfo = $page->prepareContentForEdit( $content );
394 $countKey = 'title_' . $title->getPrefixedText();
395 $countable = $page->isCountable( $editInfo );
396 if ( array_key_exists( $countKey, $this->countableCache
) &&
397 $countable != $this->countableCache
[$countKey] ) {
398 DeferredUpdates
::addUpdate( SiteStatsUpdate
::factory( array(
399 'articles' => ( (int)$countable - (int)$this->countableCache
[$countKey] )
404 $args = func_get_args();
405 return Hooks
::run( 'AfterImportPage', $args );
409 * Alternate per-revision callback, for debugging.
410 * @param WikiRevision $revision
412 public function debugRevisionHandler( &$revision ) {
413 $this->debug( "Got revision:" );
414 if ( is_object( $revision->title
) ) {
415 $this->debug( "-- Title: " . $revision->title
->getPrefixedText() );
417 $this->debug( "-- Title: <invalid>" );
419 $this->debug( "-- User: " . $revision->user_text
);
420 $this->debug( "-- Timestamp: " . $revision->timestamp
);
421 $this->debug( "-- Comment: " . $revision->comment
);
422 $this->debug( "-- Text: " . $revision->text
);
426 * Notify the callback function of site info
427 * @param array $siteInfo
430 private function siteInfoCallback( $siteInfo ) {
431 if ( isset( $this->mSiteInfoCallback
) ) {
432 return call_user_func_array( $this->mSiteInfoCallback
,
433 array( $siteInfo, $this ) );
440 * Notify the callback function when a new "<page>" is reached.
441 * @param Title $title
443 function pageCallback( $title ) {
444 if ( isset( $this->mPageCallback
) ) {
445 call_user_func( $this->mPageCallback
, $title );
450 * Notify the callback function when a "</page>" is closed.
451 * @param Title $title
452 * @param ForeignTitle $foreignTitle
453 * @param int $revCount
454 * @param int $sucCount Number of revisions for which callback returned true
455 * @param array $pageInfo Associative array of page information
457 private function pageOutCallback( $title, $foreignTitle, $revCount,
458 $sucCount, $pageInfo ) {
459 if ( isset( $this->mPageOutCallback
) ) {
460 $args = func_get_args();
461 call_user_func_array( $this->mPageOutCallback
, $args );
466 * Notify the callback function of a revision
467 * @param WikiRevision $revision
470 private function revisionCallback( $revision ) {
471 if ( isset( $this->mRevisionCallback
) ) {
472 return call_user_func_array( $this->mRevisionCallback
,
473 array( $revision, $this ) );
480 * Notify the callback function of a new log item
481 * @param WikiRevision $revision
484 private function logItemCallback( $revision ) {
485 if ( isset( $this->mLogItemCallback
) ) {
486 return call_user_func_array( $this->mLogItemCallback
,
487 array( $revision, $this ) );
494 * Retrieves the contents of the named attribute of the current element.
495 * @param string $attr The name of the attribute
496 * @return string The value of the attribute or an empty string if it is not set in the current
499 public function nodeAttribute( $attr ) {
500 return $this->reader
->getAttribute( $attr );
504 * Shouldn't something like this be built-in to XMLReader?
505 * Fetches text contents of the current element, assuming
506 * no sub-elements or such scary things.
510 public function nodeContents() {
511 if ( $this->reader
->isEmptyElement
) {
515 while ( $this->reader
->read() ) {
516 switch ( $this->reader
->nodeType
) {
517 case XMLReader
::TEXT
:
518 case XMLReader
::CDATA
:
519 case XMLReader
::SIGNIFICANT_WHITESPACE
:
520 $buffer .= $this->reader
->value
;
522 case XMLReader
::END_ELEMENT
:
527 $this->reader
->close();
532 * Primary entry point
533 * @throws MWException
536 public function doImport() {
537 // Calls to reader->read need to be wrapped in calls to
538 // libxml_disable_entity_loader() to avoid local file
539 // inclusion attacks (bug 46932).
540 $oldDisable = libxml_disable_entity_loader( true );
541 $this->reader
->read();
543 if ( $this->reader
->localName
!= 'mediawiki' ) {
544 libxml_disable_entity_loader( $oldDisable );
545 throw new MWException( "Expected <mediawiki> tag, got " .
546 $this->reader
->localName
);
548 $this->debug( "<mediawiki> tag is correct." );
550 $this->debug( "Starting primary dump processing loop." );
552 $keepReading = $this->reader
->read();
556 while ( $keepReading ) {
557 $tag = $this->reader
->localName
;
558 $type = $this->reader
->nodeType
;
560 if ( !Hooks
::run( 'ImportHandleToplevelXMLTag', array( $this ) ) ) {
562 } elseif ( $tag == 'mediawiki' && $type == XMLReader
::END_ELEMENT
) {
564 } elseif ( $tag == 'siteinfo' ) {
565 $this->handleSiteInfo();
566 } elseif ( $tag == 'page' ) {
568 } elseif ( $tag == 'logitem' ) {
569 $this->handleLogItem();
570 } elseif ( $tag != '#text' ) {
571 $this->warn( "Unhandled top-level XML tag $tag" );
577 $keepReading = $this->reader
->next();
579 $this->debug( "Skip" );
581 $keepReading = $this->reader
->read();
584 } catch ( Exception
$ex ) {
589 libxml_disable_entity_loader( $oldDisable );
590 $this->reader
->close();
599 private function handleSiteInfo() {
600 $this->debug( "Enter site info handler." );
603 // Fields that can just be stuffed in the siteInfo object
604 $normalFields = array( 'sitename', 'base', 'generator', 'case' );
606 while ( $this->reader
->read() ) {
607 if ( $this->reader
->nodeType
== XmlReader
::END_ELEMENT
&&
608 $this->reader
->localName
== 'siteinfo' ) {
612 $tag = $this->reader
->localName
;
614 if ( $tag == 'namespace' ) {
615 $this->foreignNamespaces
[$this->nodeAttribute( 'key' )] =
616 $this->nodeContents();
617 } elseif ( in_array( $tag, $normalFields ) ) {
618 $siteInfo[$tag] = $this->nodeContents();
622 $siteInfo['_namespaces'] = $this->foreignNamespaces
;
623 $this->siteInfoCallback( $siteInfo );
626 private function handleLogItem() {
627 $this->debug( "Enter log item handler." );
630 // Fields that can just be stuffed in the pageInfo object
631 $normalFields = array( 'id', 'comment', 'type', 'action', 'timestamp',
632 'logtitle', 'params' );
634 while ( $this->reader
->read() ) {
635 if ( $this->reader
->nodeType
== XMLReader
::END_ELEMENT
&&
636 $this->reader
->localName
== 'logitem' ) {
640 $tag = $this->reader
->localName
;
642 if ( !Hooks
::run( 'ImportHandleLogItemXMLTag', array(
646 } elseif ( in_array( $tag, $normalFields ) ) {
647 $logInfo[$tag] = $this->nodeContents();
648 } elseif ( $tag == 'contributor' ) {
649 $logInfo['contributor'] = $this->handleContributor();
650 } elseif ( $tag != '#text' ) {
651 $this->warn( "Unhandled log-item XML tag $tag" );
655 $this->processLogItem( $logInfo );
659 * @param array $logInfo
662 private function processLogItem( $logInfo ) {
664 $revision = new WikiRevision( $this->config
);
666 if ( isset( $logInfo['id'] ) ) {
667 $revision->setID( $logInfo['id'] );
669 $revision->setType( $logInfo['type'] );
670 $revision->setAction( $logInfo['action'] );
671 if ( isset( $logInfo['timestamp'] ) ) {
672 $revision->setTimestamp( $logInfo['timestamp'] );
674 if ( isset( $logInfo['params'] ) ) {
675 $revision->setParams( $logInfo['params'] );
677 if ( isset( $logInfo['logtitle'] ) ) {
678 // @todo Using Title for non-local titles is a recipe for disaster.
679 // We should use ForeignTitle here instead.
680 $revision->setTitle( Title
::newFromText( $logInfo['logtitle'] ) );
683 $revision->setNoUpdates( $this->mNoUpdates
);
685 if ( isset( $logInfo['comment'] ) ) {
686 $revision->setComment( $logInfo['comment'] );
689 if ( isset( $logInfo['contributor']['ip'] ) ) {
690 $revision->setUserIP( $logInfo['contributor']['ip'] );
693 if ( !isset( $logInfo['contributor']['username'] ) ) {
694 $revision->setUsername( 'Unknown user' );
696 $revision->setUserName( $logInfo['contributor']['username'] );
699 return $this->logItemCallback( $revision );
702 private function handlePage() {
704 $this->debug( "Enter page handler." );
705 $pageInfo = array( 'revisionCount' => 0, 'successfulRevisionCount' => 0 );
707 // Fields that can just be stuffed in the pageInfo object
708 $normalFields = array( 'title', 'ns', 'id', 'redirect', 'restrictions' );
713 while ( $skip ?
$this->reader
->next() : $this->reader
->read() ) {
714 if ( $this->reader
->nodeType
== XMLReader
::END_ELEMENT
&&
715 $this->reader
->localName
== 'page' ) {
721 $tag = $this->reader
->localName
;
724 // The title is invalid, bail out of this page
726 } elseif ( !Hooks
::run( 'ImportHandlePageXMLTag', array( $this,
729 } elseif ( in_array( $tag, $normalFields ) ) {
733 // <title>Page</title>
734 // <redirect title="NewTitle"/>
736 // Because the redirect tag is built differently, we need special handling for that case.
737 if ( $tag == 'redirect' ) {
738 $pageInfo[$tag] = $this->nodeAttribute( 'title' );
740 $pageInfo[$tag] = $this->nodeContents();
742 } elseif ( $tag == 'revision' ||
$tag == 'upload' ) {
743 if ( !isset( $title ) ) {
744 $title = $this->processTitle( $pageInfo['title'],
745 isset( $pageInfo['ns'] ) ?
$pageInfo['ns'] : null );
747 // $title is either an array of two titles or false.
748 if ( is_array( $title ) ) {
749 $this->pageCallback( $title );
750 list( $pageInfo['_title'], $foreignTitle ) = $title;
758 if ( $tag == 'revision' ) {
759 $this->handleRevision( $pageInfo );
761 $this->handleUpload( $pageInfo );
764 } elseif ( $tag != '#text' ) {
765 $this->warn( "Unhandled page XML tag $tag" );
770 // @note $pageInfo is only set if a valid $title is processed above with
771 // no error. If we have a valid $title, then pageCallback is called
772 // above, $pageInfo['title'] is set and we do pageOutCallback here.
773 // If $pageInfo['_title'] is not set, then $foreignTitle is also not
774 // set since they both come from $title above.
775 if ( array_key_exists( '_title', $pageInfo ) ) {
776 $this->pageOutCallback( $pageInfo['_title'], $foreignTitle,
777 $pageInfo['revisionCount'],
778 $pageInfo['successfulRevisionCount'],
784 * @param array $pageInfo
786 private function handleRevision( &$pageInfo ) {
787 $this->debug( "Enter revision handler" );
788 $revisionInfo = array();
790 $normalFields = array( 'id', 'timestamp', 'comment', 'minor', 'model', 'format', 'text' );
794 while ( $skip ?
$this->reader
->next() : $this->reader
->read() ) {
795 if ( $this->reader
->nodeType
== XMLReader
::END_ELEMENT
&&
796 $this->reader
->localName
== 'revision' ) {
800 $tag = $this->reader
->localName
;
802 if ( !Hooks
::run( 'ImportHandleRevisionXMLTag', array(
803 $this, $pageInfo, $revisionInfo
806 } elseif ( in_array( $tag, $normalFields ) ) {
807 $revisionInfo[$tag] = $this->nodeContents();
808 } elseif ( $tag == 'contributor' ) {
809 $revisionInfo['contributor'] = $this->handleContributor();
810 } elseif ( $tag != '#text' ) {
811 $this->warn( "Unhandled revision XML tag $tag" );
816 $pageInfo['revisionCount']++
;
817 if ( $this->processRevision( $pageInfo, $revisionInfo ) ) {
818 $pageInfo['successfulRevisionCount']++
;
823 * @param array $pageInfo
824 * @param array $revisionInfo
827 private function processRevision( $pageInfo, $revisionInfo ) {
828 $revision = new WikiRevision( $this->config
);
830 if ( isset( $revisionInfo['id'] ) ) {
831 $revision->setID( $revisionInfo['id'] );
833 if ( isset( $revisionInfo['model'] ) ) {
834 $revision->setModel( $revisionInfo['model'] );
836 if ( isset( $revisionInfo['format'] ) ) {
837 $revision->setFormat( $revisionInfo['format'] );
839 $revision->setTitle( $pageInfo['_title'] );
841 if ( isset( $revisionInfo['text'] ) ) {
842 $handler = $revision->getContentHandler();
843 $text = $handler->importTransform(
844 $revisionInfo['text'],
845 $revision->getFormat() );
847 $revision->setText( $text );
849 if ( isset( $revisionInfo['timestamp'] ) ) {
850 $revision->setTimestamp( $revisionInfo['timestamp'] );
852 $revision->setTimestamp( wfTimestampNow() );
855 if ( isset( $revisionInfo['comment'] ) ) {
856 $revision->setComment( $revisionInfo['comment'] );
859 if ( isset( $revisionInfo['minor'] ) ) {
860 $revision->setMinor( true );
862 if ( isset( $revisionInfo['contributor']['ip'] ) ) {
863 $revision->setUserIP( $revisionInfo['contributor']['ip'] );
864 } elseif ( isset( $revisionInfo['contributor']['username'] ) ) {
865 $revision->setUserName( $revisionInfo['contributor']['username'] );
867 $revision->setUserName( 'Unknown user' );
869 $revision->setNoUpdates( $this->mNoUpdates
);
871 return $this->revisionCallback( $revision );
875 * @param array $pageInfo
878 private function handleUpload( &$pageInfo ) {
879 $this->debug( "Enter upload handler" );
880 $uploadInfo = array();
882 $normalFields = array( 'timestamp', 'comment', 'filename', 'text',
883 'src', 'size', 'sha1base36', 'archivename', 'rel' );
887 while ( $skip ?
$this->reader
->next() : $this->reader
->read() ) {
888 if ( $this->reader
->nodeType
== XMLReader
::END_ELEMENT
&&
889 $this->reader
->localName
== 'upload' ) {
893 $tag = $this->reader
->localName
;
895 if ( !Hooks
::run( 'ImportHandleUploadXMLTag', array(
899 } elseif ( in_array( $tag, $normalFields ) ) {
900 $uploadInfo[$tag] = $this->nodeContents();
901 } elseif ( $tag == 'contributor' ) {
902 $uploadInfo['contributor'] = $this->handleContributor();
903 } elseif ( $tag == 'contents' ) {
904 $contents = $this->nodeContents();
905 $encoding = $this->reader
->getAttribute( 'encoding' );
906 if ( $encoding === 'base64' ) {
907 $uploadInfo['fileSrc'] = $this->dumpTemp( base64_decode( $contents ) );
908 $uploadInfo['isTempSrc'] = true;
910 } elseif ( $tag != '#text' ) {
911 $this->warn( "Unhandled upload XML tag $tag" );
916 if ( $this->mImageBasePath
&& isset( $uploadInfo['rel'] ) ) {
917 $path = "{$this->mImageBasePath}/{$uploadInfo['rel']}";
918 if ( file_exists( $path ) ) {
919 $uploadInfo['fileSrc'] = $path;
920 $uploadInfo['isTempSrc'] = false;
924 if ( $this->mImportUploads
) {
925 return $this->processUpload( $pageInfo, $uploadInfo );
930 * @param string $contents
933 private function dumpTemp( $contents ) {
934 $filename = tempnam( wfTempDir(), 'importupload' );
935 file_put_contents( $filename, $contents );
940 * @param array $pageInfo
941 * @param array $uploadInfo
944 private function processUpload( $pageInfo, $uploadInfo ) {
945 $revision = new WikiRevision( $this->config
);
946 $text = isset( $uploadInfo['text'] ) ?
$uploadInfo['text'] : '';
948 $revision->setTitle( $pageInfo['_title'] );
949 $revision->setID( $pageInfo['id'] );
950 $revision->setTimestamp( $uploadInfo['timestamp'] );
951 $revision->setText( $text );
952 $revision->setFilename( $uploadInfo['filename'] );
953 if ( isset( $uploadInfo['archivename'] ) ) {
954 $revision->setArchiveName( $uploadInfo['archivename'] );
956 $revision->setSrc( $uploadInfo['src'] );
957 if ( isset( $uploadInfo['fileSrc'] ) ) {
958 $revision->setFileSrc( $uploadInfo['fileSrc'],
959 !empty( $uploadInfo['isTempSrc'] ) );
961 if ( isset( $uploadInfo['sha1base36'] ) ) {
962 $revision->setSha1Base36( $uploadInfo['sha1base36'] );
964 $revision->setSize( intval( $uploadInfo['size'] ) );
965 $revision->setComment( $uploadInfo['comment'] );
967 if ( isset( $uploadInfo['contributor']['ip'] ) ) {
968 $revision->setUserIP( $uploadInfo['contributor']['ip'] );
970 if ( isset( $uploadInfo['contributor']['username'] ) ) {
971 $revision->setUserName( $uploadInfo['contributor']['username'] );
973 $revision->setNoUpdates( $this->mNoUpdates
);
975 return call_user_func( $this->mUploadCallback
, $revision );
981 private function handleContributor() {
982 $fields = array( 'id', 'ip', 'username' );
985 if ( $this->reader
->isEmptyElement
) {
988 while ( $this->reader
->read() ) {
989 if ( $this->reader
->nodeType
== XMLReader
::END_ELEMENT
&&
990 $this->reader
->localName
== 'contributor' ) {
994 $tag = $this->reader
->localName
;
996 if ( in_array( $tag, $fields ) ) {
997 $info[$tag] = $this->nodeContents();
1005 * @param string $text
1006 * @param string|null $ns
1007 * @return array|bool
1009 private function processTitle( $text, $ns = null ) {
1010 if ( is_null( $this->foreignNamespaces
) ) {
1011 $foreignTitleFactory = new NaiveForeignTitleFactory();
1013 $foreignTitleFactory = new NamespaceAwareForeignTitleFactory(
1014 $this->foreignNamespaces
);
1017 $foreignTitle = $foreignTitleFactory->createForeignTitle( $text,
1020 $title = $this->importTitleFactory
->createTitleFromForeignTitle(
1023 $commandLineMode = $this->config
->get( 'CommandLineMode' );
1024 if ( is_null( $title ) ) {
1025 # Invalid page title? Ignore the page
1026 $this->notice( 'import-error-invalid', $foreignTitle->getFullText() );
1028 } elseif ( $title->isExternal() ) {
1029 $this->notice( 'import-error-interwiki', $title->getPrefixedText() );
1031 } elseif ( !$title->canExist() ) {
1032 $this->notice( 'import-error-special', $title->getPrefixedText() );
1034 } elseif ( !$title->userCan( 'edit' ) && !$commandLineMode ) {
1035 # Do not import if the importing wiki user cannot edit this page
1036 $this->notice( 'import-error-edit', $title->getPrefixedText() );
1038 } elseif ( !$title->exists() && !$title->userCan( 'create' ) && !$commandLineMode ) {
1039 # Do not import if the importing wiki user cannot create this page
1040 $this->notice( 'import-error-create', $title->getPrefixedText() );
1044 return array( $title, $foreignTitle );
1048 /** This is a horrible hack used to keep source compatibility */
1049 class UploadSourceAdapter
{
1051 public static $sourceRegistrations = array();
1063 * @param ImportSource $source
1066 static function registerSource( ImportSource
$source ) {
1067 $id = wfRandomString();
1069 self
::$sourceRegistrations[$id] = $source;
1075 * @param string $path
1076 * @param string $mode
1077 * @param array $options
1078 * @param string $opened_path
1081 function stream_open( $path, $mode, $options, &$opened_path ) {
1082 $url = parse_url( $path );
1085 if ( !isset( self
::$sourceRegistrations[$id] ) ) {
1089 $this->mSource
= self
::$sourceRegistrations[$id];
1098 function stream_read( $count ) {
1102 while ( !$leave && !$this->mSource
->atEnd() &&
1103 strlen( $this->mBuffer
) < $count ) {
1104 $read = $this->mSource
->readChunk();
1106 if ( !strlen( $read ) ) {
1110 $this->mBuffer
.= $read;
1113 if ( strlen( $this->mBuffer
) ) {
1114 $return = substr( $this->mBuffer
, 0, $count );
1115 $this->mBuffer
= substr( $this->mBuffer
, $count );
1118 $this->mPosition +
= strlen( $return );
1124 * @param string $data
1127 function stream_write( $data ) {
1134 function stream_tell() {
1135 return $this->mPosition
;
1141 function stream_eof() {
1142 return $this->mSource
->atEnd();
1148 function url_stat() {
1151 $result['dev'] = $result[0] = 0;
1152 $result['ino'] = $result[1] = 0;
1153 $result['mode'] = $result[2] = 0;
1154 $result['nlink'] = $result[3] = 0;
1155 $result['uid'] = $result[4] = 0;
1156 $result['gid'] = $result[5] = 0;
1157 $result['rdev'] = $result[6] = 0;
1158 $result['size'] = $result[7] = 0;
1159 $result['atime'] = $result[8] = 0;
1160 $result['mtime'] = $result[9] = 0;
1161 $result['ctime'] = $result[10] = 0;
1162 $result['blksize'] = $result[11] = 0;
1163 $result['blocks'] = $result[12] = 0;
1170 * @todo document (e.g. one-sentence class description).
1171 * @ingroup SpecialPage
1173 class WikiRevision
{
1174 /** @todo Unused? */
1175 public $importer = null;
1178 public $title = null;
1184 public $timestamp = "20010115000000";
1188 * @todo Can't find any uses. Public, because that's suspicious. Get clarity. */
1192 public $user_text = "";
1195 public $model = null;
1198 public $format = null;
1207 public $content = null;
1209 /** @var ContentHandler */
1210 protected $contentHandler = null;
1213 public $comment = "";
1216 public $minor = false;
1222 public $action = "";
1225 public $params = "";
1228 public $fileSrc = '';
1230 /** @var bool|string */
1231 public $sha1base36 = false;
1237 public $isTemp = false;
1240 public $archiveName = '';
1242 protected $filename;
1247 /** @todo Unused? */
1251 private $mNoUpdates = false;
1253 /** @var Config $config */
1256 public function __construct( Config
$config ) {
1257 $this->config
= $config;
1261 * @param Title $title
1262 * @throws MWException
1264 function setTitle( $title ) {
1265 if ( is_object( $title ) ) {
1266 $this->title
= $title;
1267 } elseif ( is_null( $title ) ) {
1268 throw new MWException( "WikiRevision given a null title in import. "
1269 . "You may need to adjust \$wgLegalTitleChars." );
1271 throw new MWException( "WikiRevision given non-object title in import." );
1278 function setID( $id ) {
1285 function setTimestamp( $ts ) {
1286 # 2003-08-05T18:30:02Z
1287 $this->timestamp
= wfTimestamp( TS_MW
, $ts );
1291 * @param string $user
1293 function setUsername( $user ) {
1294 $this->user_text
= $user;
1300 function setUserIP( $ip ) {
1301 $this->user_text
= $ip;
1305 * @param string $model
1307 function setModel( $model ) {
1308 $this->model
= $model;
1312 * @param string $format
1314 function setFormat( $format ) {
1315 $this->format
= $format;
1319 * @param string $text
1321 function setText( $text ) {
1322 $this->text
= $text;
1326 * @param string $text
1328 function setComment( $text ) {
1329 $this->comment
= $text;
1333 * @param bool $minor
1335 function setMinor( $minor ) {
1336 $this->minor
= (bool)$minor;
1342 function setSrc( $src ) {
1347 * @param string $src
1348 * @param bool $isTemp
1350 function setFileSrc( $src, $isTemp ) {
1351 $this->fileSrc
= $src;
1352 $this->fileIsTemp
= $isTemp;
1356 * @param string $sha1base36
1358 function setSha1Base36( $sha1base36 ) {
1359 $this->sha1base36
= $sha1base36;
1363 * @param string $filename
1365 function setFilename( $filename ) {
1366 $this->filename
= $filename;
1370 * @param string $archiveName
1372 function setArchiveName( $archiveName ) {
1373 $this->archiveName
= $archiveName;
1379 function setSize( $size ) {
1380 $this->size
= intval( $size );
1384 * @param string $type
1386 function setType( $type ) {
1387 $this->type
= $type;
1391 * @param string $action
1393 function setAction( $action ) {
1394 $this->action
= $action;
1398 * @param array $params
1400 function setParams( $params ) {
1401 $this->params
= $params;
1405 * @param bool $noupdates
1407 public function setNoUpdates( $noupdates ) {
1408 $this->mNoUpdates
= $noupdates;
1414 function getTitle() {
1415 return $this->title
;
1428 function getTimestamp() {
1429 return $this->timestamp
;
1435 function getUser() {
1436 return $this->user_text
;
1442 * @deprecated Since 1.21, use getContent() instead.
1444 function getText() {
1445 ContentHandler
::deprecated( __METHOD__
, '1.21' );
1451 * @return ContentHandler
1453 function getContentHandler() {
1454 if ( is_null( $this->contentHandler
) ) {
1455 $this->contentHandler
= ContentHandler
::getForModelID( $this->getModel() );
1458 return $this->contentHandler
;
1464 function getContent() {
1465 if ( is_null( $this->content
) ) {
1466 $handler = $this->getContentHandler();
1467 $this->content
= $handler->unserializeContent( $this->text
, $this->getFormat() );
1470 return $this->content
;
1476 function getModel() {
1477 if ( is_null( $this->model
) ) {
1478 $this->model
= $this->getTitle()->getContentModel();
1481 return $this->model
;
1487 function getFormat() {
1488 if ( is_null( $this->format
) ) {
1489 $this->format
= $this->getContentHandler()->getDefaultFormat();
1492 return $this->format
;
1498 function getComment() {
1499 return $this->comment
;
1505 function getMinor() {
1506 return $this->minor
;
1517 * @return bool|string
1519 function getSha1() {
1520 if ( $this->sha1base36
) {
1521 return Wikimedia\base_convert
( $this->sha1base36
, 36, 16 );
1529 function getFileSrc() {
1530 return $this->fileSrc
;
1536 function isTempSrc() {
1537 return $this->isTemp
;
1543 function getFilename() {
1544 return $this->filename
;
1550 function getArchiveName() {
1551 return $this->archiveName
;
1557 function getSize() {
1564 function getType() {
1571 function getAction() {
1572 return $this->action
;
1578 function getParams() {
1579 return $this->params
;
1585 function importOldRevision() {
1586 $dbw = wfGetDB( DB_MASTER
);
1588 # Sneak a single revision into place
1589 $user = User
::newFromName( $this->getUser() );
1591 $userId = intval( $user->getId() );
1592 $userText = $user->getName();
1596 $userText = $this->getUser();
1597 $userObj = new User
;
1600 // avoid memory leak...?
1601 Title
::clearCaches();
1603 $page = WikiPage
::factory( $this->title
);
1604 $page->loadPageData( 'fromdbmaster' );
1605 if ( !$page->exists() ) {
1606 # must create the page...
1607 $pageId = $page->insertOn( $dbw );
1609 $oldcountable = null;
1611 $pageId = $page->getId();
1614 $prior = $dbw->selectField( 'revision', '1',
1615 array( 'rev_page' => $pageId,
1616 'rev_timestamp' => $dbw->timestamp( $this->timestamp
),
1617 'rev_user_text' => $userText,
1618 'rev_comment' => $this->getComment() ),
1622 // @todo FIXME: This could fail slightly for multiple matches :P
1623 wfDebug( __METHOD__
. ": skipping existing revision for [[" .
1624 $this->title
->getPrefixedText() . "]], timestamp " . $this->timestamp
. "\n" );
1629 // Select previous version to make size diffs correct
1630 $prevId = $dbw->selectField( 'revision', 'rev_id',
1632 'rev_page' => $pageId,
1633 'rev_timestamp <= ' . $dbw->timestamp( $this->timestamp
),
1636 array( 'ORDER BY' => array(
1637 'rev_timestamp DESC',
1638 'rev_id DESC', // timestamp is not unique per page
1643 # @todo FIXME: Use original rev_id optionally (better for backups)
1645 $revision = new Revision( array(
1646 'title' => $this->title
,
1648 'content_model' => $this->getModel(),
1649 'content_format' => $this->getFormat(),
1650 // XXX: just set 'content' => $this->getContent()?
1651 'text' => $this->getContent()->serialize( $this->getFormat() ),
1652 'comment' => $this->getComment(),
1654 'user_text' => $userText,
1655 'timestamp' => $this->timestamp
,
1656 'minor_edit' => $this->minor
,
1657 'parent_id' => $prevId,
1659 $revision->insertOn( $dbw );
1660 $changed = $page->updateIfNewerOn( $dbw, $revision );
1662 if ( $changed !== false && !$this->mNoUpdates
) {
1663 wfDebug( __METHOD__
. ": running updates\n" );
1664 // countable/oldcountable stuff is handled in WikiImporter::finishImportPage
1665 $page->doEditUpdates(
1668 array( 'created' => $created, 'oldcountable' => 'no-change' )
1675 function importLogItem() {
1676 $dbw = wfGetDB( DB_MASTER
);
1678 $user = User
::newFromName( $this->getUser() );
1680 $userId = intval( $user->getId() );
1681 $userText = $user->getName();
1684 $userText = $this->getUser();
1687 # @todo FIXME: This will not record autoblocks
1688 if ( !$this->getTitle() ) {
1689 wfDebug( __METHOD__
. ": skipping invalid {$this->type}/{$this->action} log time, timestamp " .
1690 $this->timestamp
. "\n" );
1693 # Check if it exists already
1694 // @todo FIXME: Use original log ID (better for backups)
1695 $prior = $dbw->selectField( 'logging', '1',
1696 array( 'log_type' => $this->getType(),
1697 'log_action' => $this->getAction(),
1698 'log_timestamp' => $dbw->timestamp( $this->timestamp
),
1699 'log_namespace' => $this->getTitle()->getNamespace(),
1700 'log_title' => $this->getTitle()->getDBkey(),
1701 'log_comment' => $this->getComment(),
1702 # 'log_user_text' => $this->user_text,
1703 'log_params' => $this->params
),
1706 // @todo FIXME: This could fail slightly for multiple matches :P
1709 . ": skipping existing item for Log:{$this->type}/{$this->action}, timestamp "
1710 . $this->timestamp
. "\n" );
1713 $log_id = $dbw->nextSequenceValue( 'logging_log_id_seq' );
1715 'log_id' => $log_id,
1716 'log_type' => $this->type
,
1717 'log_action' => $this->action
,
1718 'log_timestamp' => $dbw->timestamp( $this->timestamp
),
1719 'log_user' => $userId,
1720 'log_user_text' => $userText,
1721 'log_namespace' => $this->getTitle()->getNamespace(),
1722 'log_title' => $this->getTitle()->getDBkey(),
1723 'log_comment' => $this->getComment(),
1724 'log_params' => $this->params
1726 $dbw->insert( 'logging', $data, __METHOD__
);
1732 function importUpload() {
1734 $archiveName = $this->getArchiveName();
1735 if ( $archiveName ) {
1736 wfDebug( __METHOD__
. "Importing archived file as $archiveName\n" );
1737 $file = OldLocalFile
::newFromArchiveName( $this->getTitle(),
1738 RepoGroup
::singleton()->getLocalRepo(), $archiveName );
1740 $file = wfLocalFile( $this->getTitle() );
1741 $file->load( File
::READ_LATEST
);
1742 wfDebug( __METHOD__
. 'Importing new file as ' . $file->getName() . "\n" );
1743 if ( $file->exists() && $file->getTimestamp() > $this->getTimestamp() ) {
1744 $archiveName = $file->getTimestamp() . '!' . $file->getName();
1745 $file = OldLocalFile
::newFromArchiveName( $this->getTitle(),
1746 RepoGroup
::singleton()->getLocalRepo(), $archiveName );
1747 wfDebug( __METHOD__
. "File already exists; importing as $archiveName\n" );
1751 wfDebug( __METHOD__
. ': Bad file for ' . $this->getTitle() . "\n" );
1755 # Get the file source or download if necessary
1756 $source = $this->getFileSrc();
1757 $flags = $this->isTempSrc() ? File
::DELETE_SOURCE
: 0;
1759 $source = $this->downloadSource();
1760 $flags |
= File
::DELETE_SOURCE
;
1763 wfDebug( __METHOD__
. ": Could not fetch remote file.\n" );
1766 $sha1 = $this->getSha1();
1767 if ( $sha1 && ( $sha1 !== sha1_file( $source ) ) ) {
1768 if ( $flags & File
::DELETE_SOURCE
) {
1769 # Broken file; delete it if it is a temporary file
1772 wfDebug( __METHOD__
. ": Corrupt file $source.\n" );
1776 $user = User
::newFromName( $this->user_text
);
1778 # Do the actual upload
1779 if ( $archiveName ) {
1780 $status = $file->uploadOld( $source, $archiveName,
1781 $this->getTimestamp(), $this->getComment(), $user, $flags );
1783 $status = $file->upload( $source, $this->getComment(), $this->getComment(),
1784 $flags, false, $this->getTimestamp(), $user );
1787 if ( $status->isGood() ) {
1788 wfDebug( __METHOD__
. ": Successful\n" );
1791 wfDebug( __METHOD__
. ': failed: ' . $status->getHTML() . "\n" );
1797 * @return bool|string
1799 function downloadSource() {
1800 if ( !$this->config
->get( 'EnableUploads' ) ) {
1804 $tempo = tempnam( wfTempDir(), 'download' );
1805 $f = fopen( $tempo, 'wb' );
1807 wfDebug( "IMPORT: couldn't write to temp file $tempo\n" );
1812 $src = $this->getSrc();
1813 $data = Http
::get( $src, array(), __METHOD__
);
1815 wfDebug( "IMPORT: couldn't fetch source $src\n" );
1821 fwrite( $f, $data );
1830 * Source interface for XML import.
1832 interface ImportSource
{
1835 * Indicates whether the end of the input has been reached.
1836 * Will return true after a finite number of calls to readChunk.
1838 * @return bool true if there is no more input, false otherwise.
1843 * Return a chunk of the input, as a (possibly empty) string.
1844 * When the end of input is reached, readChunk() returns false.
1845 * If atEnd() returns false, readChunk() will return a string.
1846 * If atEnd() returns true, readChunk() will return false.
1848 * @return bool|string
1850 function readChunk();
1854 * Used for importing XML dumps where the content of the dump is in a string.
1855 * This class is ineffecient, and should only be used for small dumps.
1856 * For larger dumps, ImportStreamSource should be used instead.
1858 * @ingroup SpecialPage
1860 class ImportStringSource
implements ImportSource
{
1861 function __construct( $string ) {
1862 $this->mString
= $string;
1863 $this->mRead
= false;
1870 return $this->mRead
;
1874 * @return bool|string
1876 function readChunk() {
1877 if ( $this->atEnd() ) {
1880 $this->mRead
= true;
1881 return $this->mString
;
1886 * Imports a XML dump from a file (either from file upload, files on disk, or HTTP)
1887 * @ingroup SpecialPage
1889 class ImportStreamSource
implements ImportSource
{
1890 function __construct( $handle ) {
1891 $this->mHandle
= $handle;
1898 return feof( $this->mHandle
);
1904 function readChunk() {
1905 return fread( $this->mHandle
, 32768 );
1909 * @param string $filename
1912 static function newFromFile( $filename ) {
1913 MediaWiki\
suppressWarnings();
1914 $file = fopen( $filename, 'rt' );
1915 MediaWiki\restoreWarnings
();
1917 return Status
::newFatal( "importcantopen" );
1919 return Status
::newGood( new ImportStreamSource( $file ) );
1923 * @param string $fieldname
1926 static function newFromUpload( $fieldname = "xmlimport" ) {
1927 $upload =& $_FILES[$fieldname];
1929 if ( $upload === null ||
!$upload['name'] ) {
1930 return Status
::newFatal( 'importnofile' );
1932 if ( !empty( $upload['error'] ) ) {
1933 switch ( $upload['error'] ) {
1935 # The uploaded file exceeds the upload_max_filesize directive in php.ini.
1936 return Status
::newFatal( 'importuploaderrorsize' );
1938 # The uploaded file exceeds the MAX_FILE_SIZE directive that
1939 # was specified in the HTML form.
1940 return Status
::newFatal( 'importuploaderrorsize' );
1942 # The uploaded file was only partially uploaded
1943 return Status
::newFatal( 'importuploaderrorpartial' );
1945 # Missing a temporary folder.
1946 return Status
::newFatal( 'importuploaderrortemp' );
1947 # case else: # Currently impossible
1951 $fname = $upload['tmp_name'];
1952 if ( is_uploaded_file( $fname ) ) {
1953 return ImportStreamSource
::newFromFile( $fname );
1955 return Status
::newFatal( 'importnofile' );
1960 * @param string $url
1961 * @param string $method
1964 static function newFromURL( $url, $method = 'GET' ) {
1965 wfDebug( __METHOD__
. ": opening $url\n" );
1966 # Use the standard HTTP fetch function; it times out
1967 # quicker and sorts out user-agent problems which might
1968 # otherwise prevent importing from large sites, such
1969 # as the Wikimedia cluster, etc.
1970 $data = Http
::request( $method, $url, array( 'followRedirects' => true ), __METHOD__
);
1971 if ( $data !== false ) {
1973 fwrite( $file, $data );
1976 return Status
::newGood( new ImportStreamSource( $file ) );
1978 return Status
::newFatal( 'importcantopen' );
1983 * @param string $interwiki
1984 * @param string $page
1985 * @param bool $history
1986 * @param bool $templates
1987 * @param int $pageLinkDepth
1990 public static function newFromInterwiki( $interwiki, $page, $history = false,
1991 $templates = false, $pageLinkDepth = 0
1993 if ( $page == '' ) {
1994 return Status
::newFatal( 'import-noarticle' );
1997 # Look up the first interwiki prefix, and let the foreign site handle
1998 # subsequent interwiki prefixes
1999 $firstIwPrefix = strtok( $interwiki, ':' );
2000 $firstIw = Interwiki
::fetch( $firstIwPrefix );
2002 return Status
::newFatal( 'importbadinterwiki' );
2005 $additionalIwPrefixes = strtok( '' );
2006 if ( $additionalIwPrefixes ) {
2007 $additionalIwPrefixes .= ':';
2009 # Have to do a DB-key replacement ourselves; otherwise spaces get
2010 # URL-encoded to +, which is wrong in this case. Similar to logic in
2011 # Title::getLocalURL
2012 $link = $firstIw->getURL( strtr( "${additionalIwPrefixes}Special:Export/$page",
2017 $params['history'] = 1;
2020 $params['templates'] = 1;
2022 if ( $pageLinkDepth ) {
2023 $params['pagelink-depth'] = $pageLinkDepth;
2026 $url = wfAppendQuery( $link, $params );
2027 # For interwikis, use POST to avoid redirects.
2028 return ImportStreamSource
::newFromURL( $url, "POST" );