includes/Import.php

   1 <?php
   2 /**
   3  * MediaWiki page data importer.
   4  *
   5  * Copyright © 2003,2005 Brion Vibber <brion@pobox.com>
   6  * https://www.mediawiki.org/
   7  *
   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.
  12  *
  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.
  17  *
  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
  22  *
  23  * @file
  24  * @ingroup SpecialPage
  25  */
  26
  27 /**
  28  * XML file reader for the page data importer
  29  *
  30  * implements Special:Import
  31  * @ingroup SpecialPage
  32  */
  33 class WikiImporter {
  34         private $reader = null;
  35         private $mLogItemCallback, $mUploadCallback, $mRevisionCallback, $mPageCallback;
  36         private $mSiteInfoCallback, $mTargetNamespace, $mTargetRootPage, $mPageOutCallback;
  37         private $mNoticeCallback, $mDebug;
  38         private $mImportUploads, $mImageBasePath;
  39         private $mNoUpdates = false;
  40
  41         /**
  42          * Creates an ImportXMLReader drawing from the source provided
  43          * @param string $source
  44          */
  45         function __construct( $source ) {
  46                 $this->reader = new XMLReader();
  47
  48                 stream_wrapper_register( 'uploadsource', 'UploadSourceAdapter' );
  49                 $id = UploadSourceAdapter::registerSource( $source );
  50                 if ( defined( 'LIBXML_PARSEHUGE' ) ) {
  51                         $this->reader->open( "uploadsource://$id", null, LIBXML_PARSEHUGE );
  52                 } else {
  53                         $this->reader->open( "uploadsource://$id" );
  54                 }
  55
  56                 // Default callbacks
  57                 $this->setRevisionCallback( array( $this, "importRevision" ) );
  58                 $this->setUploadCallback( array( $this, 'importUpload' ) );
  59                 $this->setLogItemCallback( array( $this, 'importLogItem' ) );
  60                 $this->setPageOutCallback( array( $this, 'finishImportPage' ) );
  61         }
  62
  63         /**
  64          * @return null|XMLReader
  65          */
  66         public function getReader() {
  67                 return $this->reader;
  68         }
  69
  70         public function throwXmlError( $err ) {
  71                 $this->debug( "FAILURE: $err" );
  72                 wfDebug( "WikiImporter XML error: $err\n" );
  73         }
  74
  75         public function debug( $data ) {
  76                 if ( $this->mDebug ) {
  77                         wfDebug( "IMPORT: $data\n" );
  78                 }
  79         }
  80
  81         public function warn( $data ) {
  82                 wfDebug( "IMPORT: $data\n" );
  83         }
  84
  85         public function notice( $msg /*, $param, ...*/ ) {
  86                 $params = func_get_args();
  87                 array_shift( $params );
  88
  89                 if ( is_callable( $this->mNoticeCallback ) ) {
  90                         call_user_func( $this->mNoticeCallback, $msg, $params );
  91                 } else { # No ImportReporter -> CLI
  92                         echo wfMessage( $msg, $params )->text() . "\n";
  93                 }
  94         }
  95
  96         /**
  97          * Set debug mode...
  98          * @param bool $debug
  99          */
 100         function setDebug( $debug ) {
 101                 $this->mDebug = $debug;
 102         }
 103
 104         /**
 105          * Set 'no updates' mode. In this mode, the link tables will not be updated by the importer
 106          * @param bool $noupdates
 107          */
 108         function setNoUpdates( $noupdates ) {
 109                 $this->mNoUpdates = $noupdates;
 110         }
 111
 112         /**
 113          * Set a callback that displays notice messages
 114          *
 115          * @param callable $callback
 116          * @return callable
 117          */
 118         public function setNoticeCallback( $callback ) {
 119                 return wfSetVar( $this->mNoticeCallback, $callback );
 120         }
 121
 122         /**
 123          * Sets the action to perform as each new page in the stream is reached.
 124          * @param callable $callback
 125          * @return callable
 126          */
 127         public function setPageCallback( $callback ) {
 128                 $previous = $this->mPageCallback;
 129                 $this->mPageCallback = $callback;
 130                 return $previous;
 131         }
 132
 133         /**
 134          * Sets the action to perform as each page in the stream is completed.
 135          * Callback accepts the page title (as a Title object), a second object
 136          * with the original title form (in case it's been overridden into a
 137          * local namespace), and a count of revisions.
 138          *
 139          * @param callable $callback
 140          * @return callable
 141          */
 142         public function setPageOutCallback( $callback ) {
 143                 $previous = $this->mPageOutCallback;
 144                 $this->mPageOutCallback = $callback;
 145                 return $previous;
 146         }
 147
 148         /**
 149          * Sets the action to perform as each page revision is reached.
 150          * @param callable $callback
 151          * @return callable
 152          */
 153         public function setRevisionCallback( $callback ) {
 154                 $previous = $this->mRevisionCallback;
 155                 $this->mRevisionCallback = $callback;
 156                 return $previous;
 157         }
 158
 159         /**
 160          * Sets the action to perform as each file upload version is reached.
 161          * @param callable $callback
 162          * @return callable
 163          */
 164         public function setUploadCallback( $callback ) {
 165                 $previous = $this->mUploadCallback;
 166                 $this->mUploadCallback = $callback;
 167                 return $previous;
 168         }
 169
 170         /**
 171          * Sets the action to perform as each log item reached.
 172          * @param callable $callback
 173          * @return callable
 174          */
 175         public function setLogItemCallback( $callback ) {
 176                 $previous = $this->mLogItemCallback;
 177                 $this->mLogItemCallback = $callback;
 178                 return $previous;
 179         }
 180
 181         /**
 182          * Sets the action to perform when site info is encountered
 183          * @param callable $callback
 184          * @return callable
 185          */
 186         public function setSiteInfoCallback( $callback ) {
 187                 $previous = $this->mSiteInfoCallback;
 188                 $this->mSiteInfoCallback = $callback;
 189                 return $previous;
 190         }
 191
 192         /**
 193          * Set a target namespace to override the defaults
 194          * @param null|int $namespace
 195          * @return bool
 196          */
 197         public function setTargetNamespace( $namespace ) {
 198                 if ( is_null( $namespace ) ) {
 199                         // Don't override namespaces
 200                         $this->mTargetNamespace = null;
 201                 } elseif ( $namespace >= 0 ) {
 202                         // @todo FIXME: Check for validity
 203                         $this->mTargetNamespace = intval( $namespace );
 204                 } else {
 205                         return false;
 206                 }
 207         }
 208
 209         /**
 210          * Set a target root page under which all pages are imported
 211          * @param null|string $rootpage
 212          * @return Status
 213          */
 214         public function setTargetRootPage( $rootpage ) {
 215                 $status = Status::newGood();
 216                 if ( is_null( $rootpage ) ) {
 217                         // No rootpage
 218                         $this->mTargetRootPage = null;
 219                 } elseif ( $rootpage !== '' ) {
 220                         $rootpage = rtrim( $rootpage, '/' ); //avoid double slashes
 221                         $title = Title::newFromText( $rootpage, !is_null( $this->mTargetNamespace )
 222                                 ? $this->mTargetNamespace
 223                                 : NS_MAIN
 224                         );
 225
 226                         if ( !$title || $title->isExternal() ) {
 227                                 $status->fatal( 'import-rootpage-invalid' );
 228                         } else {
 229                                 if ( !MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 230                                         global $wgContLang;
 231
 232                                         $displayNSText = $title->getNamespace() == NS_MAIN
 233                                                 ? wfMessage( 'blanknamespace' )->text()
 234                                                 : $wgContLang->getNsText( $title->getNamespace() );
 235                                         $status->fatal( 'import-rootpage-nosubpage', $displayNSText );
 236                                 } else {
 237                                         // set namespace to 'all', so the namespace check in processTitle() can passed
 238                                         $this->setTargetNamespace( null );
 239                                         $this->mTargetRootPage = $title->getPrefixedDBkey();
 240                                 }
 241                         }
 242                 }
 243                 return $status;
 244         }
 245
 246         /**
 247          * @param string $dir
 248          */
 249         public function setImageBasePath( $dir ) {
 250                 $this->mImageBasePath = $dir;
 251         }
 252
 253         /**
 254          * @param bool $import
 255          */
 256         public function setImportUploads( $import ) {
 257                 $this->mImportUploads = $import;
 258         }
 259
 260         /**
 261          * Default per-revision callback, performs the import.
 262          * @param WikiRevision $revision
 263          * @return bool
 264          */
 265         public function importRevision( $revision ) {
 266                 if ( !$revision->getContentHandler()->canBeUsedOn( $revision->getTitle() ) ) {
 267                         $this->notice( 'import-error-bad-location',
 268                                 $revision->getTitle()->getPrefixedText(),
 269                                 $revision->getID(),
 270                                 $revision->getModel(),
 271                                 $revision->getFormat() );
 272
 273                         return false;
 274                 }
 275
 276                 try {
 277                         $dbw = wfGetDB( DB_MASTER );
 278                         return $dbw->deadlockLoop( array( $revision, 'importOldRevision' ) );
 279                 } catch ( MWContentSerializationException $ex ) {
 280                         $this->notice( 'import-error-unserialize',
 281                                 $revision->getTitle()->getPrefixedText(),
 282                                 $revision->getID(),
 283                                 $revision->getModel(),
 284                                 $revision->getFormat() );
 285                 }
 286
 287                 return false;
 288         }
 289
 290         /**
 291          * Default per-revision callback, performs the import.
 292          * @param WikiRevision $revision
 293          * @return bool
 294          */
 295         public function importLogItem( $revision ) {
 296                 $dbw = wfGetDB( DB_MASTER );
 297                 return $dbw->deadlockLoop( array( $revision, 'importLogItem' ) );
 298         }
 299
 300         /**
 301          * Dummy for now...
 302          * @param WikiRevision $revision
 303          * @return bool
 304          */
 305         public function importUpload( $revision ) {
 306                 $dbw = wfGetDB( DB_MASTER );
 307                 return $dbw->deadlockLoop( array( $revision, 'importUpload' ) );
 308         }
 309
 310         /**
 311          * Mostly for hook use
 312          * @param Title $title
 313          * @param string $origTitle
 314          * @param int $revCount
 315          * @param int $sRevCount
 316          * @param array $pageInfo
 317          * @return bool
 318          */
 319         public function finishImportPage( $title, $origTitle, $revCount, $sRevCount, $pageInfo ) {
 320                 $args = func_get_args();
 321                 return wfRunHooks( 'AfterImportPage', $args );
 322         }
 323
 324         /**
 325          * Alternate per-revision callback, for debugging.
 326          * @param WikiRevision $revision
 327          */
 328         public function debugRevisionHandler( &$revision ) {
 329                 $this->debug( "Got revision:" );
 330                 if ( is_object( $revision->title ) ) {
 331                         $this->debug( "-- Title: " . $revision->title->getPrefixedText() );
 332                 } else {
 333                         $this->debug( "-- Title: <invalid>" );
 334                 }
 335                 $this->debug( "-- User: " . $revision->user_text );
 336                 $this->debug( "-- Timestamp: " . $revision->timestamp );
 337                 $this->debug( "-- Comment: " . $revision->comment );
 338                 $this->debug( "-- Text: " . $revision->text );
 339         }
 340
 341         /**
 342          * Notify the callback function when a new "<page>" is reached.
 343          * @param Title $title
 344          */
 345         function pageCallback( $title ) {
 346                 if ( isset( $this->mPageCallback ) ) {
 347                         call_user_func( $this->mPageCallback, $title );
 348                 }
 349         }
 350
 351         /**
 352          * Notify the callback function when a "</page>" is closed.
 353          * @param Title $title
 354          * @param Title $origTitle
 355          * @param int $revCount
 356          * @param int $sucCount Number of revisions for which callback returned true
 357          * @param array $pageInfo Associative array of page information
 358          */
 359         private function pageOutCallback( $title, $origTitle, $revCount, $sucCount, $pageInfo ) {
 360                 if ( isset( $this->mPageOutCallback ) ) {
 361                         $args = func_get_args();
 362                         call_user_func_array( $this->mPageOutCallback, $args );
 363                 }
 364         }
 365
 366         /**
 367          * Notify the callback function of a revision
 368          * @param WikiRevision $revision
 369          * @return bool|mixed
 370          */
 371         private function revisionCallback( $revision ) {
 372                 if ( isset( $this->mRevisionCallback ) ) {
 373                         return call_user_func_array( $this->mRevisionCallback,
 374                                         array( $revision, $this ) );
 375                 } else {
 376                         return false;
 377                 }
 378         }
 379
 380         /**
 381          * Notify the callback function of a new log item
 382          * @param WikiRevision $revision
 383          * @return bool|mixed
 384          */
 385         private function logItemCallback( $revision ) {
 386                 if ( isset( $this->mLogItemCallback ) ) {
 387                         return call_user_func_array( $this->mLogItemCallback,
 388                                         array( $revision, $this ) );
 389                 } else {
 390                         return false;
 391                 }
 392         }
 393
 394         /**
 395          * Shouldn't something like this be built-in to XMLReader?
 396          * Fetches text contents of the current element, assuming
 397          * no sub-elements or such scary things.
 398          * @return string
 399          * @access private
 400          */
 401         public function nodeContents() {
 402                 if ( $this->reader->isEmptyElement ) {
 403                         return "";
 404                 }
 405                 $buffer = "";
 406                 while ( $this->reader->read() ) {
 407                         switch ( $this->reader->nodeType ) {
 408                         case XmlReader::TEXT:
 409                         case XmlReader::SIGNIFICANT_WHITESPACE:
 410                                 $buffer .= $this->reader->value;
 411                                 break;
 412                         case XmlReader::END_ELEMENT:
 413                                 return $buffer;
 414                         }
 415                 }
 416
 417                 $this->reader->close();
 418                 return '';
 419         }
 420
 421         # --------------
 422
 423         /** Left in for debugging */
 424         private function dumpElement() {
 425                 static $lookup = null;
 426                 if ( !$lookup ) {
 427                         $xmlReaderConstants = array(
 428                                 "NONE",
 429                                 "ELEMENT",
 430                                 "ATTRIBUTE",
 431                                 "TEXT",
 432                                 "CDATA",
 433                                 "ENTITY_REF",
 434                                 "ENTITY",
 435                                 "PI",
 436                                 "COMMENT",
 437                                 "DOC",
 438                                 "DOC_TYPE",
 439                                 "DOC_FRAGMENT",
 440                                 "NOTATION",
 441                                 "WHITESPACE",
 442                                 "SIGNIFICANT_WHITESPACE",
 443                                 "END_ELEMENT",
 444                                 "END_ENTITY",
 445                                 "XML_DECLARATION",
 446                         );
 447                         $lookup = array();
 448
 449                         foreach ( $xmlReaderConstants as $name ) {
 450                                 $lookup[constant( "XmlReader::$name" )] = $name;
 451                         }
 452                 }
 453
 454                 print var_dump(
 455                         $lookup[$this->reader->nodeType],
 456                         $this->reader->name,
 457                         $this->reader->value
 458                 ) . "\n\n";
 459         }
 460
 461         /**
 462          * Primary entry point
 463          * @throws MWException
 464          * @return bool
 465          */
 466         public function doImport() {
 467
 468                 // Calls to reader->read need to be wrapped in calls to
 469                 // libxml_disable_entity_loader() to avoid local file
 470                 // inclusion attacks (bug 46932).
 471                 $oldDisable = libxml_disable_entity_loader( true );
 472                 $this->reader->read();
 473
 474                 if ( $this->reader->name != 'mediawiki' ) {
 475                         libxml_disable_entity_loader( $oldDisable );
 476                         throw new MWException( "Expected <mediawiki> tag, got " .
 477                                 $this->reader->name );
 478                 }
 479                 $this->debug( "<mediawiki> tag is correct." );
 480
 481                 $this->debug( "Starting primary dump processing loop." );
 482
 483                 $keepReading = $this->reader->read();
 484                 $skip = false;
 485                 while ( $keepReading ) {
 486                         $tag = $this->reader->name;
 487                         $type = $this->reader->nodeType;
 488
 489                         if ( !wfRunHooks( 'ImportHandleToplevelXMLTag', array( $this ) ) ) {
 490                                 // Do nothing
 491                         } elseif ( $tag == 'mediawiki' && $type == XmlReader::END_ELEMENT ) {
 492                                 break;
 493                         } elseif ( $tag == 'siteinfo' ) {
 494                                 $this->handleSiteInfo();
 495                         } elseif ( $tag == 'page' ) {
 496                                 $this->handlePage();
 497                         } elseif ( $tag == 'logitem' ) {
 498                                 $this->handleLogItem();
 499                         } elseif ( $tag != '#text' ) {
 500                                 $this->warn( "Unhandled top-level XML tag $tag" );
 501
 502                                 $skip = true;
 503                         }
 504
 505                         if ( $skip ) {
 506                                 $keepReading = $this->reader->next();
 507                                 $skip = false;
 508                                 $this->debug( "Skip" );
 509                         } else {
 510                                 $keepReading = $this->reader->read();
 511                         }
 512                 }
 513
 514                 libxml_disable_entity_loader( $oldDisable );
 515                 return true;
 516         }
 517
 518         /**
 519          * @return bool
 520          * @throws MWException
 521          */
 522         private function handleSiteInfo() {
 523                 // Site info is useful, but not actually used for dump imports.
 524                 // Includes a quick short-circuit to save performance.
 525                 if ( ! $this->mSiteInfoCallback ) {
 526                         $this->reader->next();
 527                         return true;
 528                 }
 529                 throw new MWException( "SiteInfo tag is not yet handled, do not set mSiteInfoCallback" );
 530         }
 531
 532         private function handleLogItem() {
 533                 $this->debug( "Enter log item handler." );
 534                 $logInfo = array();
 535
 536                 // Fields that can just be stuffed in the pageInfo object
 537                 $normalFields = array( 'id', 'comment', 'type', 'action', 'timestamp',
 538                                         'logtitle', 'params' );
 539
 540                 while ( $this->reader->read() ) {
 541                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 542                                         $this->reader->name == 'logitem' ) {
 543                                 break;
 544                         }
 545
 546                         $tag = $this->reader->name;
 547
 548                         if ( !wfRunHooks( 'ImportHandleLogItemXMLTag', array(
 549                                 $this, $logInfo
 550                         ) ) ) {
 551                                 // Do nothing
 552                         } elseif ( in_array( $tag, $normalFields ) ) {
 553                                 $logInfo[$tag] = $this->nodeContents();
 554                         } elseif ( $tag == 'contributor' ) {
 555                                 $logInfo['contributor'] = $this->handleContributor();
 556                         } elseif ( $tag != '#text' ) {
 557                                 $this->warn( "Unhandled log-item XML tag $tag" );
 558                         }
 559                 }
 560
 561                 $this->processLogItem( $logInfo );
 562         }
 563
 564         /**
 565          * @param array $logInfo
 566          * @return bool|mixed
 567          */
 568         private function processLogItem( $logInfo ) {
 569                 $revision = new WikiRevision;
 570
 571                 $revision->setID( $logInfo['id'] );
 572                 $revision->setType( $logInfo['type'] );
 573                 $revision->setAction( $logInfo['action'] );
 574                 $revision->setTimestamp( $logInfo['timestamp'] );
 575                 $revision->setParams( $logInfo['params'] );
 576                 $revision->setTitle( Title::newFromText( $logInfo['logtitle'] ) );
 577                 $revision->setNoUpdates( $this->mNoUpdates );
 578
 579                 if ( isset( $logInfo['comment'] ) ) {
 580                         $revision->setComment( $logInfo['comment'] );
 581                 }
 582
 583                 if ( isset( $logInfo['contributor']['ip'] ) ) {
 584                         $revision->setUserIP( $logInfo['contributor']['ip'] );
 585                 }
 586                 if ( isset( $logInfo['contributor']['username'] ) ) {
 587                         $revision->setUserName( $logInfo['contributor']['username'] );
 588                 }
 589
 590                 return $this->logItemCallback( $revision );
 591         }
 592
 593         private function handlePage() {
 594                 // Handle page data.
 595                 $this->debug( "Enter page handler." );
 596                 $pageInfo = array( 'revisionCount' => 0, 'successfulRevisionCount' => 0 );
 597
 598                 // Fields that can just be stuffed in the pageInfo object
 599                 $normalFields = array( 'title', 'id', 'redirect', 'restrictions' );
 600
 601                 $skip = false;
 602                 $badTitle = false;
 603
 604                 while ( $skip ? $this->reader->next() : $this->reader->read() ) {
 605                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 606                                         $this->reader->name == 'page' ) {
 607                                 break;
 608                         }
 609
 610                         $tag = $this->reader->name;
 611
 612                         if ( $badTitle ) {
 613                                 // The title is invalid, bail out of this page
 614                                 $skip = true;
 615                         } elseif ( !wfRunHooks( 'ImportHandlePageXMLTag', array( $this,
 616                                                 &$pageInfo ) ) ) {
 617                                 // Do nothing
 618                         } elseif ( in_array( $tag, $normalFields ) ) {
 619                                 $pageInfo[$tag] = $this->nodeContents();
 620                                 if ( $tag == 'title' ) {
 621                                         $title = $this->processTitle( $pageInfo['title'] );
 622
 623                                         if ( !$title ) {
 624                                                 $badTitle = true;
 625                                                 $skip = true;
 626                                         }
 627
 628                                         $this->pageCallback( $title );
 629                                         list( $pageInfo['_title'], $origTitle ) = $title;
 630                                 }
 631                         } elseif ( $tag == 'revision' ) {
 632                                 $this->handleRevision( $pageInfo );
 633                         } elseif ( $tag == 'upload' ) {
 634                                 $this->handleUpload( $pageInfo );
 635                         } elseif ( $tag != '#text' ) {
 636                                 $this->warn( "Unhandled page XML tag $tag" );
 637                                 $skip = true;
 638                         }
 639                 }
 640
 641                 $this->pageOutCallback( $pageInfo['_title'], $origTitle,
 642                                         $pageInfo['revisionCount'],
 643                                         $pageInfo['successfulRevisionCount'],
 644                                         $pageInfo );
 645         }
 646
 647         /**
 648          * @param array $pageInfo
 649          */
 650         private function handleRevision( &$pageInfo ) {
 651                 $this->debug( "Enter revision handler" );
 652                 $revisionInfo = array();
 653
 654                 $normalFields = array( 'id', 'timestamp', 'comment', 'minor', 'model', 'format', 'text' );
 655
 656                 $skip = false;
 657
 658                 while ( $skip ? $this->reader->next() : $this->reader->read() ) {
 659                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 660                                         $this->reader->name == 'revision' ) {
 661                                 break;
 662                         }
 663
 664                         $tag = $this->reader->name;
 665
 666                         if ( !wfRunHooks( 'ImportHandleRevisionXMLTag', array(
 667                                 $this, $pageInfo, $revisionInfo
 668                         ) ) ) {
 669                                 // Do nothing
 670                         } elseif ( in_array( $tag, $normalFields ) ) {
 671                                 $revisionInfo[$tag] = $this->nodeContents();
 672                         } elseif ( $tag == 'contributor' ) {
 673                                 $revisionInfo['contributor'] = $this->handleContributor();
 674                         } elseif ( $tag != '#text' ) {
 675                                 $this->warn( "Unhandled revision XML tag $tag" );
 676                                 $skip = true;
 677                         }
 678                 }
 679
 680                 $pageInfo['revisionCount']++;
 681                 if ( $this->processRevision( $pageInfo, $revisionInfo ) ) {
 682                         $pageInfo['successfulRevisionCount']++;
 683                 }
 684         }
 685
 686         /**
 687          * @param array $pageInfo
 688          * @param array $revisionInfo
 689          * @return bool|mixed
 690          */
 691         private function processRevision( $pageInfo, $revisionInfo ) {
 692                 $revision = new WikiRevision;
 693
 694                 if ( isset( $revisionInfo['id'] ) ) {
 695                         $revision->setID( $revisionInfo['id'] );
 696                 }
 697                 if ( isset( $revisionInfo['model'] ) ) {
 698                         $revision->setModel( $revisionInfo['model'] );
 699                 }
 700                 if ( isset( $revisionInfo['format'] ) ) {
 701                         $revision->setFormat( $revisionInfo['format'] );
 702                 }
 703                 $revision->setTitle( $pageInfo['_title'] );
 704
 705                 if ( isset( $revisionInfo['text'] ) ) {
 706                         $handler = $revision->getContentHandler();
 707                         $text = $handler->importTransform(
 708                                 $revisionInfo['text'],
 709                                 $revision->getFormat() );
 710
 711                         $revision->setText( $text );
 712                 }
 713                 if ( isset( $revisionInfo['timestamp'] ) ) {
 714                         $revision->setTimestamp( $revisionInfo['timestamp'] );
 715                 } else {
 716                         $revision->setTimestamp( wfTimestampNow() );
 717                 }
 718
 719                 if ( isset( $revisionInfo['comment'] ) ) {
 720                         $revision->setComment( $revisionInfo['comment'] );
 721                 }
 722
 723                 if ( isset( $revisionInfo['minor'] ) ) {
 724                         $revision->setMinor( true );
 725                 }
 726                 if ( isset( $revisionInfo['contributor']['ip'] ) ) {
 727                         $revision->setUserIP( $revisionInfo['contributor']['ip'] );
 728                 }
 729                 if ( isset( $revisionInfo['contributor']['username'] ) ) {
 730                         $revision->setUserName( $revisionInfo['contributor']['username'] );
 731                 }
 732                 $revision->setNoUpdates( $this->mNoUpdates );
 733
 734                 return $this->revisionCallback( $revision );
 735         }
 736
 737         /**
 738          * @param array $pageInfo
 739          * @return mixed
 740          */
 741         private function handleUpload( &$pageInfo ) {
 742                 $this->debug( "Enter upload handler" );
 743                 $uploadInfo = array();
 744
 745                 $normalFields = array( 'timestamp', 'comment', 'filename', 'text',
 746                                         'src', 'size', 'sha1base36', 'archivename', 'rel' );
 747
 748                 $skip = false;
 749
 750                 while ( $skip ? $this->reader->next() : $this->reader->read() ) {
 751                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 752                                         $this->reader->name == 'upload' ) {
 753                                 break;
 754                         }
 755
 756                         $tag = $this->reader->name;
 757
 758                         if ( !wfRunHooks( 'ImportHandleUploadXMLTag', array(
 759                                 $this, $pageInfo
 760                         ) ) ) {
 761                                 // Do nothing
 762                         } elseif ( in_array( $tag, $normalFields ) ) {
 763                                 $uploadInfo[$tag] = $this->nodeContents();
 764                         } elseif ( $tag == 'contributor' ) {
 765                                 $uploadInfo['contributor'] = $this->handleContributor();
 766                         } elseif ( $tag == 'contents' ) {
 767                                 $contents = $this->nodeContents();
 768                                 $encoding = $this->reader->getAttribute( 'encoding' );
 769                                 if ( $encoding === 'base64' ) {
 770                                         $uploadInfo['fileSrc'] = $this->dumpTemp( base64_decode( $contents ) );
 771                                         $uploadInfo['isTempSrc'] = true;
 772                                 }
 773                         } elseif ( $tag != '#text' ) {
 774                                 $this->warn( "Unhandled upload XML tag $tag" );
 775                                 $skip = true;
 776                         }
 777                 }
 778
 779                 if ( $this->mImageBasePath && isset( $uploadInfo['rel'] ) ) {
 780                         $path = "{$this->mImageBasePath}/{$uploadInfo['rel']}";
 781                         if ( file_exists( $path ) ) {
 782                                 $uploadInfo['fileSrc'] = $path;
 783                                 $uploadInfo['isTempSrc'] = false;
 784                         }
 785                 }
 786
 787                 if ( $this->mImportUploads ) {
 788                         return $this->processUpload( $pageInfo, $uploadInfo );
 789                 }
 790         }
 791
 792         /**
 793          * @param string $contents
 794          * @return string
 795          */
 796         private function dumpTemp( $contents ) {
 797                 $filename = tempnam( wfTempDir(), 'importupload' );
 798                 file_put_contents( $filename, $contents );
 799                 return $filename;
 800         }
 801
 802         /**
 803          * @param array $pageInfo
 804          * @param array $uploadInfo
 805          * @return mixed
 806          */
 807         private function processUpload( $pageInfo, $uploadInfo ) {
 808                 $revision = new WikiRevision;
 809                 $text = isset( $uploadInfo['text'] ) ? $uploadInfo['text'] : '';
 810
 811                 $revision->setTitle( $pageInfo['_title'] );
 812                 $revision->setID( $pageInfo['id'] );
 813                 $revision->setTimestamp( $uploadInfo['timestamp'] );
 814                 $revision->setText( $text );
 815                 $revision->setFilename( $uploadInfo['filename'] );
 816                 if ( isset( $uploadInfo['archivename'] ) ) {
 817                         $revision->setArchiveName( $uploadInfo['archivename'] );
 818                 }
 819                 $revision->setSrc( $uploadInfo['src'] );
 820                 if ( isset( $uploadInfo['fileSrc'] ) ) {
 821                         $revision->setFileSrc( $uploadInfo['fileSrc'],
 822                                 !empty( $uploadInfo['isTempSrc'] ) );
 823                 }
 824                 if ( isset( $uploadInfo['sha1base36'] ) ) {
 825                         $revision->setSha1Base36( $uploadInfo['sha1base36'] );
 826                 }
 827                 $revision->setSize( intval( $uploadInfo['size'] ) );
 828                 $revision->setComment( $uploadInfo['comment'] );
 829
 830                 if ( isset( $uploadInfo['contributor']['ip'] ) ) {
 831                         $revision->setUserIP( $uploadInfo['contributor']['ip'] );
 832                 }
 833                 if ( isset( $uploadInfo['contributor']['username'] ) ) {
 834                         $revision->setUserName( $uploadInfo['contributor']['username'] );
 835                 }
 836                 $revision->setNoUpdates( $this->mNoUpdates );
 837
 838                 return call_user_func( $this->mUploadCallback, $revision );
 839         }
 840
 841         /**
 842          * @return array
 843          */
 844         private function handleContributor() {
 845                 $fields = array( 'id', 'ip', 'username' );
 846                 $info = array();
 847
 848                 while ( $this->reader->read() ) {
 849                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 850                                         $this->reader->name == 'contributor' ) {
 851                                 break;
 852                         }
 853
 854                         $tag = $this->reader->name;
 855
 856                         if ( in_array( $tag, $fields ) ) {
 857                                 $info[$tag] = $this->nodeContents();
 858                         }
 859                 }
 860
 861                 return $info;
 862         }
 863
 864         /**
 865          * @param string $text
 866          * @return array|bool
 867          */
 868         private function processTitle( $text ) {
 869                 global $wgCommandLineMode;
 870
 871                 $workTitle = $text;
 872                 $origTitle = Title::newFromText( $workTitle );
 873
 874                 if ( !is_null( $this->mTargetNamespace ) && !is_null( $origTitle ) ) {
 875                         # makeTitleSafe, because $origTitle can have a interwiki (different setting of interwiki map)
 876                         # and than dbKey can begin with a lowercase char
 877                         $title = Title::makeTitleSafe( $this->mTargetNamespace,
 878                                 $origTitle->getDBkey() );
 879                 } else {
 880                         if ( !is_null( $this->mTargetRootPage ) ) {
 881                                 $workTitle = $this->mTargetRootPage . '/' . $workTitle;
 882                         }
 883                         $title = Title::newFromText( $workTitle );
 884                 }
 885
 886                 if ( is_null( $title ) ) {
 887                         # Invalid page title? Ignore the page
 888                         $this->notice( 'import-error-invalid', $workTitle );
 889                         return false;
 890                 } elseif ( $title->isExternal() ) {
 891                         $this->notice( 'import-error-interwiki', $title->getPrefixedText() );
 892                         return false;
 893                 } elseif ( !$title->canExist() ) {
 894                         $this->notice( 'import-error-special', $title->getPrefixedText() );
 895                         return false;
 896                 } elseif ( !$title->userCan( 'edit' ) && !$wgCommandLineMode ) {
 897                         # Do not import if the importing wiki user cannot edit this page
 898                         $this->notice( 'import-error-edit', $title->getPrefixedText() );
 899                         return false;
 900                 } elseif ( !$title->exists() && !$title->userCan( 'create' ) && !$wgCommandLineMode ) {
 901                         # Do not import if the importing wiki user cannot create this page
 902                         $this->notice( 'import-error-create', $title->getPrefixedText() );
 903                         return false;
 904                 }
 905
 906                 return array( $title, $origTitle );
 907         }
 908 }
 909
 910 /** This is a horrible hack used to keep source compatibility */
 911 class UploadSourceAdapter {
 912         /** @var array */
 913         private static $sourceRegistrations = array();
 914
 915         /** @var string */
 916         private $mSource;
 917
 918         /** @var string */
 919         private $mBuffer;
 920
 921         /** @var int */
 922         private $mPosition;
 923
 924         /**
 925          * @param string $source
 926          * @return string
 927          */
 928         static function registerSource( $source ) {
 929                 $id = wfRandomString();
 930
 931                 self::$sourceRegistrations[$id] = $source;
 932
 933                 return $id;
 934         }
 935
 936         /**
 937          * @param string $path
 938          * @param string $mode
 939          * @param array $options
 940          * @param string $opened_path
 941          * @return bool
 942          */
 943         function stream_open( $path, $mode, $options, &$opened_path ) {
 944                 $url = parse_url( $path );
 945                 $id = $url['host'];
 946
 947                 if ( !isset( self::$sourceRegistrations[$id] ) ) {
 948                         return false;
 949                 }
 950
 951                 $this->mSource = self::$sourceRegistrations[$id];
 952
 953                 return true;
 954         }
 955
 956         /**
 957          * @param int $count
 958          * @return string
 959          */
 960         function stream_read( $count ) {
 961                 $return = '';
 962                 $leave = false;
 963
 964                 while ( !$leave && !$this->mSource->atEnd() &&
 965                                 strlen( $this->mBuffer ) < $count ) {
 966                         $read = $this->mSource->readChunk();
 967
 968                         if ( !strlen( $read ) ) {
 969                                 $leave = true;
 970                         }
 971
 972                         $this->mBuffer .= $read;
 973                 }
 974
 975                 if ( strlen( $this->mBuffer ) ) {
 976                         $return = substr( $this->mBuffer, 0, $count );
 977                         $this->mBuffer = substr( $this->mBuffer, $count );
 978                 }
 979
 980                 $this->mPosition += strlen( $return );
 981
 982                 return $return;
 983         }
 984
 985         /**
 986          * @param string $data
 987          * @return bool
 988          */
 989         function stream_write( $data ) {
 990                 return false;
 991         }
 992
 993         /**
 994          * @return mixed
 995          */
 996         function stream_tell() {
 997                 return $this->mPosition;
 998         }
 999
1000         /**
1001          * @return bool
1002          */
1003         function stream_eof() {
1004                 return $this->mSource->atEnd();
1005         }
1006
1007         /**
1008          * @return array
1009          */
1010         function url_stat() {
1011                 $result = array();
1012
1013                 $result['dev'] = $result[0] = 0;
1014                 $result['ino'] = $result[1] = 0;
1015                 $result['mode'] = $result[2] = 0;
1016                 $result['nlink'] = $result[3] = 0;
1017                 $result['uid'] = $result[4] = 0;
1018                 $result['gid'] = $result[5] = 0;
1019                 $result['rdev'] = $result[6] = 0;
1020                 $result['size'] = $result[7] = 0;
1021                 $result['atime'] = $result[8] = 0;
1022                 $result['mtime'] = $result[9] = 0;
1023                 $result['ctime'] = $result[10] = 0;
1024                 $result['blksize'] = $result[11] = 0;
1025                 $result['blocks'] = $result[12] = 0;
1026
1027                 return $result;
1028         }
1029 }
1030
1031 class XMLReader2 extends XMLReader {
1032
1033         /**
1034          * @return bool|string
1035          */
1036         function nodeContents() {
1037                 if ( $this->isEmptyElement ) {
1038                         return "";
1039                 }
1040                 $buffer = "";
1041                 while ( $this->read() ) {
1042                         switch ( $this->nodeType ) {
1043                         case XmlReader::TEXT:
1044                         case XmlReader::SIGNIFICANT_WHITESPACE:
1045                                 $buffer .= $this->value;
1046                                 break;
1047                         case XmlReader::END_ELEMENT:
1048                                 return $buffer;
1049                         }
1050                 }
1051                 return $this->close();
1052         }
1053 }
1054
1055 /**
1056  * @todo document (e.g. one-sentence class description).
1057  * @ingroup SpecialPage
1058  */
1059 class WikiRevision {
1060         /** @todo Unused? */
1061         private $importer = null;
1062
1063         /** @var Title */
1064         public $title = null;
1065
1066         /** @var int */
1067         private $id = 0;
1068
1069         /** @var string */
1070         public $timestamp = "20010115000000";
1071
1072         /**
1073          * @var int
1074          * @todo Can't find any uses. Public, because that's suspicious. Get clarity. */
1075         public $user = 0;
1076
1077         /** @var string */
1078         public $user_text = "";
1079
1080         /** @var string */
1081         protected $model = null;
1082
1083         /** @var string */
1084         protected $format = null;
1085
1086         /** @var string */
1087         public $text = "";
1088
1089         /** @var int */
1090         protected $size;
1091
1092         /** @var Content */
1093         protected $content = null;
1094
1095         /** @var ContentHandler */
1096         protected $contentHandler = null;
1097
1098         /** @var string */
1099         public $comment = "";
1100
1101         /** @var bool */
1102         protected $minor = false;
1103
1104         /** @var string */
1105         protected $type = "";
1106
1107         /** @var string */
1108         protected $action = "";
1109
1110         /** @var string */
1111         protected $params = "";
1112
1113         /** @var string */
1114         protected $fileSrc = '';
1115
1116         /** @var bool|string */
1117         protected $sha1base36 = false;
1118
1119         /**
1120          * @var bool
1121          * @todo Unused?
1122          */
1123         private $isTemp = false;
1124
1125         /** @var string */
1126         protected $archiveName = '';
1127
1128         protected $filename;
1129
1130         /** @var mixed */
1131         protected $src;
1132
1133         /** @todo Unused? */
1134         private $fileIsTemp;
1135
1136         /** @var bool */
1137         private $mNoUpdates = false;
1138
1139         /**
1140          * @param Title $title
1141          * @throws MWException
1142          */
1143         function setTitle( $title ) {
1144                 if ( is_object( $title ) ) {
1145                         $this->title = $title;
1146                 } elseif ( is_null( $title ) ) {
1147                         throw new MWException( "WikiRevision given a null title in import. "
1148                                 . "You may need to adjust \$wgLegalTitleChars." );
1149                 } else {
1150                         throw new MWException( "WikiRevision given non-object title in import." );
1151                 }
1152         }
1153
1154         /**
1155          * @param int $id
1156          */
1157         function setID( $id ) {
1158                 $this->id = $id;
1159         }
1160
1161         /**
1162          * @param string $ts
1163          */
1164         function setTimestamp( $ts ) {
1165                 # 2003-08-05T18:30:02Z
1166                 $this->timestamp = wfTimestamp( TS_MW, $ts );
1167         }
1168
1169         /**
1170          * @param string $user
1171          */
1172         function setUsername( $user ) {
1173                 $this->user_text = $user;
1174         }
1175
1176         /**
1177          * @param string $ip
1178          */
1179         function setUserIP( $ip ) {
1180                 $this->user_text = $ip;
1181         }
1182
1183         /**
1184          * @param string $model
1185          */
1186         function setModel( $model ) {
1187                 $this->model = $model;
1188         }
1189
1190         /**
1191          * @param string $format
1192          */
1193         function setFormat( $format ) {
1194                 $this->format = $format;
1195         }
1196
1197         /**
1198          * @param string $text
1199          */
1200         function setText( $text ) {
1201                 $this->text = $text;
1202         }
1203
1204         /**
1205          * @param string $text
1206          */
1207         function setComment( $text ) {
1208                 $this->comment = $text;
1209         }
1210
1211         /**
1212          * @param bool $minor
1213          */
1214         function setMinor( $minor ) {
1215                 $this->minor = (bool)$minor;
1216         }
1217
1218         /**
1219          * @param mixed $src
1220          */
1221         function setSrc( $src ) {
1222                 $this->src = $src;
1223         }
1224
1225         /**
1226          * @param string $src
1227          * @param bool $isTemp
1228          */
1229         function setFileSrc( $src, $isTemp ) {
1230                 $this->fileSrc = $src;
1231                 $this->fileIsTemp = $isTemp;
1232         }
1233
1234         /**
1235          * @param string $sha1base36
1236          */
1237         function setSha1Base36( $sha1base36 ) {
1238                 $this->sha1base36 = $sha1base36;
1239         }
1240
1241         /**
1242          * @param string $filename
1243          */
1244         function setFilename( $filename ) {
1245                 $this->filename = $filename;
1246         }
1247
1248         /**
1249          * @param string $archiveName
1250          */
1251         function setArchiveName( $archiveName ) {
1252                 $this->archiveName = $archiveName;
1253         }
1254
1255         /**
1256          * @param int $size
1257          */
1258         function setSize( $size ) {
1259                 $this->size = intval( $size );
1260         }
1261
1262         /**
1263          * @param string $type
1264          */
1265         function setType( $type ) {
1266                 $this->type = $type;
1267         }
1268
1269         /**
1270          * @param string $action
1271          */
1272         function setAction( $action ) {
1273                 $this->action = $action;
1274         }
1275
1276         /**
1277          * @param array $params
1278          */
1279         function setParams( $params ) {
1280                 $this->params = $params;
1281         }
1282
1283         /**
1284          * @param bool $noupdates
1285          */
1286         public function setNoUpdates( $noupdates ) {
1287                 $this->mNoUpdates = $noupdates;
1288         }
1289
1290         /**
1291          * @return Title
1292          */
1293         function getTitle() {
1294                 return $this->title;
1295         }
1296
1297         /**
1298          * @return int
1299          */
1300         function getID() {
1301                 return $this->id;
1302         }
1303
1304         /**
1305          * @return string
1306          */
1307         function getTimestamp() {
1308                 return $this->timestamp;
1309         }
1310
1311         /**
1312          * @return string
1313          */
1314         function getUser() {
1315                 return $this->user_text;
1316         }
1317
1318         /**
1319          * @return string
1320          *
1321          * @deprecated Since 1.21, use getContent() instead.
1322          */
1323         function getText() {
1324                 ContentHandler::deprecated( __METHOD__, '1.21' );
1325
1326                 return $this->text;
1327         }
1328
1329         /**
1330          * @return ContentHandler
1331          */
1332         function getContentHandler() {
1333                 if ( is_null( $this->contentHandler ) ) {
1334                         $this->contentHandler = ContentHandler::getForModelID( $this->getModel() );
1335                 }
1336
1337                 return $this->contentHandler;
1338         }
1339
1340         /**
1341          * @return Content
1342          */
1343         function getContent() {
1344                 if ( is_null( $this->content ) ) {
1345                         $handler = $this->getContentHandler();
1346                         $this->content = $handler->unserializeContent( $this->text, $this->getFormat() );
1347                 }
1348
1349                 return $this->content;
1350         }
1351
1352         /**
1353          * @return string
1354          */
1355         function getModel() {
1356                 if ( is_null( $this->model ) ) {
1357                         $this->model = $this->getTitle()->getContentModel();
1358                 }
1359
1360                 return $this->model;
1361         }
1362
1363         /**
1364          * @return string
1365          */
1366         function getFormat() {
1367                 if ( is_null( $this->format ) ) {
1368                         $this->format = $this->getContentHandler()->getDefaultFormat();
1369                 }
1370
1371                 return $this->format;
1372         }
1373
1374         /**
1375          * @return string
1376          */
1377         function getComment() {
1378                 return $this->comment;
1379         }
1380
1381         /**
1382          * @return bool
1383          */
1384         function getMinor() {
1385                 return $this->minor;
1386         }
1387
1388         /**
1389          * @return mixed
1390          */
1391         function getSrc() {
1392                 return $this->src;
1393         }
1394
1395         /**
1396          * @return bool|string
1397          */
1398         function getSha1() {
1399                 if ( $this->sha1base36 ) {
1400                         return wfBaseConvert( $this->sha1base36, 36, 16 );
1401                 }
1402                 return false;
1403         }
1404
1405         /**
1406          * @return string
1407          */
1408         function getFileSrc() {
1409                 return $this->fileSrc;
1410         }
1411
1412         /**
1413          * @return bool
1414          */
1415         function isTempSrc() {
1416                 return $this->isTemp;
1417         }
1418
1419         /**
1420          * @return mixed
1421          */
1422         function getFilename() {
1423                 return $this->filename;
1424         }
1425
1426         /**
1427          * @return string
1428          */
1429         function getArchiveName() {
1430                 return $this->archiveName;
1431         }
1432
1433         /**
1434          * @return mixed
1435          */
1436         function getSize() {
1437                 return $this->size;
1438         }
1439
1440         /**
1441          * @return string
1442          */
1443         function getType() {
1444                 return $this->type;
1445         }
1446
1447         /**
1448          * @return string
1449          */
1450         function getAction() {
1451                 return $this->action;
1452         }
1453
1454         /**
1455          * @return string
1456          */
1457         function getParams() {
1458                 return $this->params;
1459         }
1460
1461         /**
1462          * @return bool
1463          */
1464         function importOldRevision() {
1465                 $dbw = wfGetDB( DB_MASTER );
1466
1467                 # Sneak a single revision into place
1468                 $user = User::newFromName( $this->getUser() );
1469                 if ( $user ) {
1470                         $userId = intval( $user->getId() );
1471                         $userText = $user->getName();
1472                         $userObj = $user;
1473                 } else {
1474                         $userId = 0;
1475                         $userText = $this->getUser();
1476                         $userObj = new User;
1477                 }
1478
1479                 // avoid memory leak...?
1480                 $linkCache = LinkCache::singleton();
1481                 $linkCache->clear();
1482
1483                 $page = WikiPage::factory( $this->title );
1484                 if ( !$page->exists() ) {
1485                         # must create the page...
1486                         $pageId = $page->insertOn( $dbw );
1487                         $created = true;
1488                         $oldcountable = null;
1489                 } else {
1490                         $pageId = $page->getId();
1491                         $created = false;
1492
1493                         $prior = $dbw->selectField( 'revision', '1',
1494                                 array( 'rev_page' => $pageId,
1495                                         'rev_timestamp' => $dbw->timestamp( $this->timestamp ),
1496                                         'rev_user_text' => $userText,
1497                                         'rev_comment' => $this->getComment() ),
1498                                 __METHOD__
1499                         );
1500                         if ( $prior ) {
1501                                 // @todo FIXME: This could fail slightly for multiple matches :P
1502                                 wfDebug( __METHOD__ . ": skipping existing revision for [[" .
1503                                         $this->title->getPrefixedText() . "]], timestamp " . $this->timestamp . "\n" );
1504                                 return false;
1505                         }
1506                         $oldcountable = $page->isCountable();
1507                 }
1508
1509                 # @todo FIXME: Use original rev_id optionally (better for backups)
1510                 # Insert the row
1511                 $revision = new Revision( array(
1512                         'title' => $this->title,
1513                         'page' => $pageId,
1514                         'content_model' => $this->getModel(),
1515                         'content_format' => $this->getFormat(),
1516                         //XXX: just set 'content' => $this->getContent()?
1517                         'text' => $this->getContent()->serialize( $this->getFormat() ),
1518                         'comment' => $this->getComment(),
1519                         'user' => $userId,
1520                         'user_text' => $userText,
1521                         'timestamp' => $this->timestamp,
1522                         'minor_edit' => $this->minor,
1523                         ) );
1524                 $revision->insertOn( $dbw );
1525                 $changed = $page->updateIfNewerOn( $dbw, $revision );
1526
1527                 if ( $changed !== false && !$this->mNoUpdates ) {
1528                         wfDebug( __METHOD__ . ": running updates\n" );
1529                         $page->doEditUpdates(
1530                                 $revision,
1531                                 $userObj,
1532                                 array( 'created' => $created, 'oldcountable' => $oldcountable )
1533                         );
1534                 }
1535
1536                 return true;
1537         }
1538
1539         /**
1540          * @return mixed
1541          */
1542         function importLogItem() {
1543                 $dbw = wfGetDB( DB_MASTER );
1544                 # @todo FIXME: This will not record autoblocks
1545                 if ( !$this->getTitle() ) {
1546                         wfDebug( __METHOD__ . ": skipping invalid {$this->type}/{$this->action} log time, timestamp " .
1547                                 $this->timestamp . "\n" );
1548                         return;
1549                 }
1550                 # Check if it exists already
1551                 // @todo FIXME: Use original log ID (better for backups)
1552                 $prior = $dbw->selectField( 'logging', '1',
1553                         array( 'log_type' => $this->getType(),
1554                                 'log_action' => $this->getAction(),
1555                                 'log_timestamp' => $dbw->timestamp( $this->timestamp ),
1556                                 'log_namespace' => $this->getTitle()->getNamespace(),
1557                                 'log_title' => $this->getTitle()->getDBkey(),
1558                                 'log_comment' => $this->getComment(),
1559                                 #'log_user_text' => $this->user_text,
1560                                 'log_params' => $this->params ),
1561                         __METHOD__
1562                 );
1563                 // @todo FIXME: This could fail slightly for multiple matches :P
1564                 if ( $prior ) {
1565                         wfDebug( __METHOD__
1566                                 . ": skipping existing item for Log:{$this->type}/{$this->action}, timestamp "
1567                                 . $this->timestamp . "\n" );
1568                         return;
1569                 }
1570                 $log_id = $dbw->nextSequenceValue( 'logging_log_id_seq' );
1571                 $data = array(
1572                         'log_id' => $log_id,
1573                         'log_type' => $this->type,
1574                         'log_action' => $this->action,
1575                         'log_timestamp' => $dbw->timestamp( $this->timestamp ),
1576                         'log_user' => User::idFromName( $this->user_text ),
1577                         #'log_user_text' => $this->user_text,
1578                         'log_namespace' => $this->getTitle()->getNamespace(),
1579                         'log_title' => $this->getTitle()->getDBkey(),
1580                         'log_comment' => $this->getComment(),
1581                         'log_params' => $this->params
1582                 );
1583                 $dbw->insert( 'logging', $data, __METHOD__ );
1584         }
1585
1586         /**
1587          * @return bool
1588          */
1589         function importUpload() {
1590                 # Construct a file
1591                 $archiveName = $this->getArchiveName();
1592                 if ( $archiveName ) {
1593                         wfDebug( __METHOD__ . "Importing archived file as $archiveName\n" );
1594                         $file = OldLocalFile::newFromArchiveName( $this->getTitle(),
1595                                 RepoGroup::singleton()->getLocalRepo(), $archiveName );
1596                 } else {
1597                         $file = wfLocalFile( $this->getTitle() );
1598                         wfDebug( __METHOD__ . 'Importing new file as ' . $file->getName() . "\n" );
1599                         if ( $file->exists() && $file->getTimestamp() > $this->getTimestamp() ) {
1600                                 $archiveName = $file->getTimestamp() . '!' . $file->getName();
1601                                 $file = OldLocalFile::newFromArchiveName( $this->getTitle(),
1602                                         RepoGroup::singleton()->getLocalRepo(), $archiveName );
1603                                 wfDebug( __METHOD__ . "File already exists; importing as $archiveName\n" );
1604                         }
1605                 }
1606                 if ( !$file ) {
1607                         wfDebug( __METHOD__ . ': Bad file for ' . $this->getTitle() . "\n" );
1608                         return false;
1609                 }
1610
1611                 # Get the file source or download if necessary
1612                 $source = $this->getFileSrc();
1613                 $flags = $this->isTempSrc() ? File::DELETE_SOURCE : 0;
1614                 if ( !$source ) {
1615                         $source = $this->downloadSource();
1616                         $flags |= File::DELETE_SOURCE;
1617                 }
1618                 if ( !$source ) {
1619                         wfDebug( __METHOD__ . ": Could not fetch remote file.\n" );
1620                         return false;
1621                 }
1622                 $sha1 = $this->getSha1();
1623                 if ( $sha1 && ( $sha1 !== sha1_file( $source ) ) ) {
1624                         if ( $flags & File::DELETE_SOURCE ) {
1625                                 # Broken file; delete it if it is a temporary file
1626                                 unlink( $source );
1627                         }
1628                         wfDebug( __METHOD__ . ": Corrupt file $source.\n" );
1629                         return false;
1630                 }
1631
1632                 $user = User::newFromName( $this->user_text );
1633
1634                 # Do the actual upload
1635                 if ( $archiveName ) {
1636                         $status = $file->uploadOld( $source, $archiveName,
1637                                 $this->getTimestamp(), $this->getComment(), $user, $flags );
1638                 } else {
1639                         $status = $file->upload( $source, $this->getComment(), $this->getComment(),
1640                                 $flags, false, $this->getTimestamp(), $user );
1641                 }
1642
1643                 if ( $status->isGood() ) {
1644                         wfDebug( __METHOD__ . ": Successful\n" );
1645                         return true;
1646                 } else {
1647                         wfDebug( __METHOD__ . ': failed: ' . $status->getXml() . "\n" );
1648                         return false;
1649                 }
1650         }
1651
1652         /**
1653          * @return bool|string
1654          */
1655         function downloadSource() {
1656                 global $wgEnableUploads;
1657                 if ( !$wgEnableUploads ) {
1658                         return false;
1659                 }
1660
1661                 $tempo = tempnam( wfTempDir(), 'download' );
1662                 $f = fopen( $tempo, 'wb' );
1663                 if ( !$f ) {
1664                         wfDebug( "IMPORT: couldn't write to temp file $tempo\n" );
1665                         return false;
1666                 }
1667
1668                 // @todo FIXME!
1669                 $src = $this->getSrc();
1670                 $data = Http::get( $src );
1671                 if ( !$data ) {
1672                         wfDebug( "IMPORT: couldn't fetch source $src\n" );
1673                         fclose( $f );
1674                         unlink( $tempo );
1675                         return false;
1676                 }
1677
1678                 fwrite( $f, $data );
1679                 fclose( $f );
1680
1681                 return $tempo;
1682         }
1683
1684 }
1685
1686 /**
1687  * @todo document (e.g. one-sentence class description).
1688  * @ingroup SpecialPage
1689  */
1690 class ImportStringSource {
1691         function __construct( $string ) {
1692                 $this->mString = $string;
1693                 $this->mRead = false;
1694         }
1695
1696         /**
1697          * @return bool
1698          */
1699         function atEnd() {
1700                 return $this->mRead;
1701         }
1702
1703         /**
1704          * @return bool|string
1705          */
1706         function readChunk() {
1707                 if ( $this->atEnd() ) {
1708                         return false;
1709                 }
1710                 $this->mRead = true;
1711                 return $this->mString;
1712         }
1713 }
1714
1715 /**
1716  * @todo document (e.g. one-sentence class description).
1717  * @ingroup SpecialPage
1718  */
1719 class ImportStreamSource {
1720         function __construct( $handle ) {
1721                 $this->mHandle = $handle;
1722         }
1723
1724         /**
1725          * @return bool
1726          */
1727         function atEnd() {
1728                 return feof( $this->mHandle );
1729         }
1730
1731         /**
1732          * @return string
1733          */
1734         function readChunk() {
1735                 return fread( $this->mHandle, 32768 );
1736         }
1737
1738         /**
1739          * @param string $filename
1740          * @return Status
1741          */
1742         static function newFromFile( $filename ) {
1743                 wfSuppressWarnings();
1744                 $file = fopen( $filename, 'rt' );
1745                 wfRestoreWarnings();
1746                 if ( !$file ) {
1747                         return Status::newFatal( "importcantopen" );
1748                 }
1749                 return Status::newGood( new ImportStreamSource( $file ) );
1750         }
1751
1752         /**
1753          * @param string $fieldname
1754          * @return Status
1755          */
1756         static function newFromUpload( $fieldname = "xmlimport" ) {
1757                 $upload =& $_FILES[$fieldname];
1758
1759                 if ( $upload === null || !$upload['name'] ) {
1760                         return Status::newFatal( 'importnofile' );
1761                 }
1762                 if ( !empty( $upload['error'] ) ) {
1763                         switch ( $upload['error'] ) {
1764                                 case 1:
1765                                         # The uploaded file exceeds the upload_max_filesize directive in php.ini.
1766                                         return Status::newFatal( 'importuploaderrorsize' );
1767                                 case 2:
1768                                         # The uploaded file exceeds the MAX_FILE_SIZE directive that
1769                                         # was specified in the HTML form.
1770                                         return Status::newFatal( 'importuploaderrorsize' );
1771                                 case 3:
1772                                         # The uploaded file was only partially uploaded
1773                                         return Status::newFatal( 'importuploaderrorpartial' );
1774                                 case 6:
1775                                         # Missing a temporary folder.
1776                                         return Status::newFatal( 'importuploaderrortemp' );
1777                                 # case else: # Currently impossible
1778                         }
1779
1780                 }
1781                 $fname = $upload['tmp_name'];
1782                 if ( is_uploaded_file( $fname ) ) {
1783                         return ImportStreamSource::newFromFile( $fname );
1784                 } else {
1785                         return Status::newFatal( 'importnofile' );
1786                 }
1787         }
1788
1789         /**
1790          * @param string $url
1791          * @param string $method
1792          * @return Status
1793          */
1794         static function newFromURL( $url, $method = 'GET' ) {
1795                 wfDebug( __METHOD__ . ": opening $url\n" );
1796                 # Use the standard HTTP fetch function; it times out
1797                 # quicker and sorts out user-agent problems which might
1798                 # otherwise prevent importing from large sites, such
1799                 # as the Wikimedia cluster, etc.
1800                 $data = Http::request( $method, $url, array( 'followRedirects' => true ) );
1801                 if ( $data !== false ) {
1802                         $file = tmpfile();
1803                         fwrite( $file, $data );
1804                         fflush( $file );
1805                         fseek( $file, 0 );
1806                         return Status::newGood( new ImportStreamSource( $file ) );
1807                 } else {
1808                         return Status::newFatal( 'importcantopen' );
1809                 }
1810         }
1811
1812         /**
1813          * @param string $interwiki
1814          * @param string $page
1815          * @param bool $history
1816          * @param bool $templates
1817          * @param int $pageLinkDepth
1818          * @return Status
1819          */
1820         public static function newFromInterwiki( $interwiki, $page, $history = false,
1821                 $templates = false, $pageLinkDepth = 0
1822         ) {
1823                 if ( $page == '' ) {
1824                         return Status::newFatal( 'import-noarticle' );
1825                 }
1826                 $link = Title::newFromText( "$interwiki:Special:Export/$page" );
1827                 if ( is_null( $link ) || !$link->isExternal() ) {
1828                         return Status::newFatal( 'importbadinterwiki' );
1829                 } else {
1830                         $params = array();
1831                         if ( $history ) {
1832                                 $params['history'] = 1;
1833                         }
1834                         if ( $templates ) {
1835                                 $params['templates'] = 1;
1836                         }
1837                         if ( $pageLinkDepth ) {
1838                                 $params['pagelink-depth'] = $pageLinkDepth;
1839                         }
1840                         $url = $link->getFullURL( $params );
1841                         # For interwikis, use POST to avoid redirects.
1842                         return ImportStreamSource::newFromURL( $url, "POST" );
1843                 }
1844         }
1845 }