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                 if ( !in_array(  'uploadsource', stream_get_wrappers() ) ) {
  49                         stream_wrapper_register( 'uploadsource', 'UploadSourceAdapter' );
  50                 }
  51                 $id = UploadSourceAdapter::registerSource( $source );
  52                 if ( defined( 'LIBXML_PARSEHUGE' ) ) {
  53                         $this->reader->open( "uploadsource://$id", null, LIBXML_PARSEHUGE );
  54                 } else {
  55                         $this->reader->open( "uploadsource://$id" );
  56                 }
  57
  58                 // Default callbacks
  59                 $this->setRevisionCallback( array( $this, "importRevision" ) );
  60                 $this->setUploadCallback( array( $this, 'importUpload' ) );
  61                 $this->setLogItemCallback( array( $this, 'importLogItem' ) );
  62                 $this->setPageOutCallback( array( $this, 'finishImportPage' ) );
  63         }
  64
  65         /**
  66          * @return null|XMLReader
  67          */
  68         public function getReader() {
  69                 return $this->reader;
  70         }
  71
  72         public function throwXmlError( $err ) {
  73                 $this->debug( "FAILURE: $err" );
  74                 wfDebug( "WikiImporter XML error: $err\n" );
  75         }
  76
  77         public function debug( $data ) {
  78                 if ( $this->mDebug ) {
  79                         wfDebug( "IMPORT: $data\n" );
  80                 }
  81         }
  82
  83         public function warn( $data ) {
  84                 wfDebug( "IMPORT: $data\n" );
  85         }
  86
  87         public function notice( $msg /*, $param, ...*/ ) {
  88                 $params = func_get_args();
  89                 array_shift( $params );
  90
  91                 if ( is_callable( $this->mNoticeCallback ) ) {
  92                         call_user_func( $this->mNoticeCallback, $msg, $params );
  93                 } else { # No ImportReporter -> CLI
  94                         echo wfMessage( $msg, $params )->text() . "\n";
  95                 }
  96         }
  97
  98         /**
  99          * Set debug mode...
 100          * @param bool $debug
 101          */
 102         function setDebug( $debug ) {
 103                 $this->mDebug = $debug;
 104         }
 105
 106         /**
 107          * Set 'no updates' mode. In this mode, the link tables will not be updated by the importer
 108          * @param bool $noupdates
 109          */
 110         function setNoUpdates( $noupdates ) {
 111                 $this->mNoUpdates = $noupdates;
 112         }
 113
 114         /**
 115          * Set a callback that displays notice messages
 116          *
 117          * @param callable $callback
 118          * @return callable
 119          */
 120         public function setNoticeCallback( $callback ) {
 121                 return wfSetVar( $this->mNoticeCallback, $callback );
 122         }
 123
 124         /**
 125          * Sets the action to perform as each new page in the stream is reached.
 126          * @param callable $callback
 127          * @return callable
 128          */
 129         public function setPageCallback( $callback ) {
 130                 $previous = $this->mPageCallback;
 131                 $this->mPageCallback = $callback;
 132                 return $previous;
 133         }
 134
 135         /**
 136          * Sets the action to perform as each page in the stream is completed.
 137          * Callback accepts the page title (as a Title object), a second object
 138          * with the original title form (in case it's been overridden into a
 139          * local namespace), and a count of revisions.
 140          *
 141          * @param callable $callback
 142          * @return callable
 143          */
 144         public function setPageOutCallback( $callback ) {
 145                 $previous = $this->mPageOutCallback;
 146                 $this->mPageOutCallback = $callback;
 147                 return $previous;
 148         }
 149
 150         /**
 151          * Sets the action to perform as each page revision is reached.
 152          * @param callable $callback
 153          * @return callable
 154          */
 155         public function setRevisionCallback( $callback ) {
 156                 $previous = $this->mRevisionCallback;
 157                 $this->mRevisionCallback = $callback;
 158                 return $previous;
 159         }
 160
 161         /**
 162          * Sets the action to perform as each file upload version is reached.
 163          * @param callable $callback
 164          * @return callable
 165          */
 166         public function setUploadCallback( $callback ) {
 167                 $previous = $this->mUploadCallback;
 168                 $this->mUploadCallback = $callback;
 169                 return $previous;
 170         }
 171
 172         /**
 173          * Sets the action to perform as each log item reached.
 174          * @param callable $callback
 175          * @return callable
 176          */
 177         public function setLogItemCallback( $callback ) {
 178                 $previous = $this->mLogItemCallback;
 179                 $this->mLogItemCallback = $callback;
 180                 return $previous;
 181         }
 182
 183         /**
 184          * Sets the action to perform when site info is encountered
 185          * @param callable $callback
 186          * @return callable
 187          */
 188         public function setSiteInfoCallback( $callback ) {
 189                 $previous = $this->mSiteInfoCallback;
 190                 $this->mSiteInfoCallback = $callback;
 191                 return $previous;
 192         }
 193
 194         /**
 195          * Set a target namespace to override the defaults
 196          * @param null|int $namespace
 197          * @return bool
 198          */
 199         public function setTargetNamespace( $namespace ) {
 200                 if ( is_null( $namespace ) ) {
 201                         // Don't override namespaces
 202                         $this->mTargetNamespace = null;
 203                 } elseif ( $namespace >= 0 ) {
 204                         // @todo FIXME: Check for validity
 205                         $this->mTargetNamespace = intval( $namespace );
 206                 } else {
 207                         return false;
 208                 }
 209         }
 210
 211         /**
 212          * Set a target root page under which all pages are imported
 213          * @param null|string $rootpage
 214          * @return Status
 215          */
 216         public function setTargetRootPage( $rootpage ) {
 217                 $status = Status::newGood();
 218                 if ( is_null( $rootpage ) ) {
 219                         // No rootpage
 220                         $this->mTargetRootPage = null;
 221                 } elseif ( $rootpage !== '' ) {
 222                         $rootpage = rtrim( $rootpage, '/' ); //avoid double slashes
 223                         $title = Title::newFromText( $rootpage, !is_null( $this->mTargetNamespace )
 224                                 ? $this->mTargetNamespace
 225                                 : NS_MAIN
 226                         );
 227
 228                         if ( !$title || $title->isExternal() ) {
 229                                 $status->fatal( 'import-rootpage-invalid' );
 230                         } else {
 231                                 if ( !MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 232                                         global $wgContLang;
 233
 234                                         $displayNSText = $title->getNamespace() == NS_MAIN
 235                                                 ? wfMessage( 'blanknamespace' )->text()
 236                                                 : $wgContLang->getNsText( $title->getNamespace() );
 237                                         $status->fatal( 'import-rootpage-nosubpage', $displayNSText );
 238                                 } else {
 239                                         // set namespace to 'all', so the namespace check in processTitle() can passed
 240                                         $this->setTargetNamespace( null );
 241                                         $this->mTargetRootPage = $title->getPrefixedDBkey();
 242                                 }
 243                         }
 244                 }
 245                 return $status;
 246         }
 247
 248         /**
 249          * @param string $dir
 250          */
 251         public function setImageBasePath( $dir ) {
 252                 $this->mImageBasePath = $dir;
 253         }
 254
 255         /**
 256          * @param bool $import
 257          */
 258         public function setImportUploads( $import ) {
 259                 $this->mImportUploads = $import;
 260         }
 261
 262         /**
 263          * Default per-revision callback, performs the import.
 264          * @param WikiRevision $revision
 265          * @return bool
 266          */
 267         public function importRevision( $revision ) {
 268                 if ( !$revision->getContentHandler()->canBeUsedOn( $revision->getTitle() ) ) {
 269                         $this->notice( 'import-error-bad-location',
 270                                 $revision->getTitle()->getPrefixedText(),
 271                                 $revision->getID(),
 272                                 $revision->getModel(),
 273                                 $revision->getFormat() );
 274
 275                         return false;
 276                 }
 277
 278                 try {
 279                         $dbw = wfGetDB( DB_MASTER );
 280                         return $dbw->deadlockLoop( array( $revision, 'importOldRevision' ) );
 281                 } catch ( MWContentSerializationException $ex ) {
 282                         $this->notice( 'import-error-unserialize',
 283                                 $revision->getTitle()->getPrefixedText(),
 284                                 $revision->getID(),
 285                                 $revision->getModel(),
 286                                 $revision->getFormat() );
 287                 }
 288
 289                 return false;
 290         }
 291
 292         /**
 293          * Default per-revision callback, performs the import.
 294          * @param WikiRevision $revision
 295          * @return bool
 296          */
 297         public function importLogItem( $revision ) {
 298                 $dbw = wfGetDB( DB_MASTER );
 299                 return $dbw->deadlockLoop( array( $revision, 'importLogItem' ) );
 300         }
 301
 302         /**
 303          * Dummy for now...
 304          * @param WikiRevision $revision
 305          * @return bool
 306          */
 307         public function importUpload( $revision ) {
 308                 $dbw = wfGetDB( DB_MASTER );
 309                 return $dbw->deadlockLoop( array( $revision, 'importUpload' ) );
 310         }
 311
 312         /**
 313          * Mostly for hook use
 314          * @param Title $title
 315          * @param string $origTitle
 316          * @param int $revCount
 317          * @param int $sRevCount
 318          * @param array $pageInfo
 319          * @return bool
 320          */
 321         public function finishImportPage( $title, $origTitle, $revCount, $sRevCount, $pageInfo ) {
 322                 $args = func_get_args();
 323                 return wfRunHooks( 'AfterImportPage', $args );
 324         }
 325
 326         /**
 327          * Alternate per-revision callback, for debugging.
 328          * @param WikiRevision $revision
 329          */
 330         public function debugRevisionHandler( &$revision ) {
 331                 $this->debug( "Got revision:" );
 332                 if ( is_object( $revision->title ) ) {
 333                         $this->debug( "-- Title: " . $revision->title->getPrefixedText() );
 334                 } else {
 335                         $this->debug( "-- Title: <invalid>" );
 336                 }
 337                 $this->debug( "-- User: " . $revision->user_text );
 338                 $this->debug( "-- Timestamp: " . $revision->timestamp );
 339                 $this->debug( "-- Comment: " . $revision->comment );
 340                 $this->debug( "-- Text: " . $revision->text );
 341         }
 342
 343         /**
 344          * Notify the callback function when a new "<page>" is reached.
 345          * @param Title $title
 346          */
 347         function pageCallback( $title ) {
 348                 if ( isset( $this->mPageCallback ) ) {
 349                         call_user_func( $this->mPageCallback, $title );
 350                 }
 351         }
 352
 353         /**
 354          * Notify the callback function when a "</page>" is closed.
 355          * @param Title $title
 356          * @param Title $origTitle
 357          * @param int $revCount
 358          * @param int $sucCount Number of revisions for which callback returned true
 359          * @param array $pageInfo Associative array of page information
 360          */
 361         private function pageOutCallback( $title, $origTitle, $revCount, $sucCount, $pageInfo ) {
 362                 if ( isset( $this->mPageOutCallback ) ) {
 363                         $args = func_get_args();
 364                         call_user_func_array( $this->mPageOutCallback, $args );
 365                 }
 366         }
 367
 368         /**
 369          * Notify the callback function of a revision
 370          * @param WikiRevision $revision
 371          * @return bool|mixed
 372          */
 373         private function revisionCallback( $revision ) {
 374                 if ( isset( $this->mRevisionCallback ) ) {
 375                         return call_user_func_array( $this->mRevisionCallback,
 376                                         array( $revision, $this ) );
 377                 } else {
 378                         return false;
 379                 }
 380         }
 381
 382         /**
 383          * Notify the callback function of a new log item
 384          * @param WikiRevision $revision
 385          * @return bool|mixed
 386          */
 387         private function logItemCallback( $revision ) {
 388                 if ( isset( $this->mLogItemCallback ) ) {
 389                         return call_user_func_array( $this->mLogItemCallback,
 390                                         array( $revision, $this ) );
 391                 } else {
 392                         return false;
 393                 }
 394         }
 395
 396         /**
 397          * Shouldn't something like this be built-in to XMLReader?
 398          * Fetches text contents of the current element, assuming
 399          * no sub-elements or such scary things.
 400          * @return string
 401          * @access private
 402          */
 403         public function nodeContents() {
 404                 if ( $this->reader->isEmptyElement ) {
 405                         return "";
 406                 }
 407                 $buffer = "";
 408                 while ( $this->reader->read() ) {
 409                         switch ( $this->reader->nodeType ) {
 410                         case XmlReader::TEXT:
 411                         case XmlReader::SIGNIFICANT_WHITESPACE:
 412                                 $buffer .= $this->reader->value;
 413                                 break;
 414                         case XmlReader::END_ELEMENT:
 415                                 return $buffer;
 416                         }
 417                 }
 418
 419                 $this->reader->close();
 420                 return '';
 421         }
 422
 423         # --------------
 424
 425         /** Left in for debugging */
 426         private function dumpElement() {
 427                 static $lookup = null;
 428                 if ( !$lookup ) {
 429                         $xmlReaderConstants = array(
 430                                 "NONE",
 431                                 "ELEMENT",
 432                                 "ATTRIBUTE",
 433                                 "TEXT",
 434                                 "CDATA",
 435                                 "ENTITY_REF",
 436                                 "ENTITY",
 437                                 "PI",
 438                                 "COMMENT",
 439                                 "DOC",
 440                                 "DOC_TYPE",
 441                                 "DOC_FRAGMENT",
 442                                 "NOTATION",
 443                                 "WHITESPACE",
 444                                 "SIGNIFICANT_WHITESPACE",
 445                                 "END_ELEMENT",
 446                                 "END_ENTITY",
 447                                 "XML_DECLARATION",
 448                         );
 449                         $lookup = array();
 450
 451                         foreach ( $xmlReaderConstants as $name ) {
 452                                 $lookup[constant( "XmlReader::$name" )] = $name;
 453                         }
 454                 }
 455
 456                 print var_dump(
 457                         $lookup[$this->reader->nodeType],
 458                         $this->reader->name,
 459                         $this->reader->value
 460                 ) . "\n\n";
 461         }
 462
 463         /**
 464          * Primary entry point
 465          * @throws MWException
 466          * @return bool
 467          */
 468         public function doImport() {
 469
 470                 // Calls to reader->read need to be wrapped in calls to
 471                 // libxml_disable_entity_loader() to avoid local file
 472                 // inclusion attacks (bug 46932).
 473                 $oldDisable = libxml_disable_entity_loader( true );
 474                 $this->reader->read();
 475
 476                 if ( $this->reader->name != 'mediawiki' ) {
 477                         libxml_disable_entity_loader( $oldDisable );
 478                         throw new MWException( "Expected <mediawiki> tag, got " .
 479                                 $this->reader->name );
 480                 }
 481                 $this->debug( "<mediawiki> tag is correct." );
 482
 483                 $this->debug( "Starting primary dump processing loop." );
 484
 485                 $keepReading = $this->reader->read();
 486                 $skip = false;
 487                 while ( $keepReading ) {
 488                         $tag = $this->reader->name;
 489                         $type = $this->reader->nodeType;
 490
 491                         if ( !wfRunHooks( 'ImportHandleToplevelXMLTag', array( $this ) ) ) {
 492                                 // Do nothing
 493                         } elseif ( $tag == 'mediawiki' && $type == XmlReader::END_ELEMENT ) {
 494                                 break;
 495                         } elseif ( $tag == 'siteinfo' ) {
 496                                 $this->handleSiteInfo();
 497                         } elseif ( $tag == 'page' ) {
 498                                 $this->handlePage();
 499                         } elseif ( $tag == 'logitem' ) {
 500                                 $this->handleLogItem();
 501                         } elseif ( $tag != '#text' ) {
 502                                 $this->warn( "Unhandled top-level XML tag $tag" );
 503
 504                                 $skip = true;
 505                         }
 506
 507                         if ( $skip ) {
 508                                 $keepReading = $this->reader->next();
 509                                 $skip = false;
 510                                 $this->debug( "Skip" );
 511                         } else {
 512                                 $keepReading = $this->reader->read();
 513                         }
 514                 }
 515
 516                 libxml_disable_entity_loader( $oldDisable );
 517                 return true;
 518         }
 519
 520         /**
 521          * @return bool
 522          * @throws MWException
 523          */
 524         private function handleSiteInfo() {
 525                 // Site info is useful, but not actually used for dump imports.
 526                 // Includes a quick short-circuit to save performance.
 527                 if ( ! $this->mSiteInfoCallback ) {
 528                         $this->reader->next();
 529                         return true;
 530                 }
 531                 throw new MWException( "SiteInfo tag is not yet handled, do not set mSiteInfoCallback" );
 532         }
 533
 534         private function handleLogItem() {
 535                 $this->debug( "Enter log item handler." );
 536                 $logInfo = array();
 537
 538                 // Fields that can just be stuffed in the pageInfo object
 539                 $normalFields = array( 'id', 'comment', 'type', 'action', 'timestamp',
 540                                         'logtitle', 'params' );
 541
 542                 while ( $this->reader->read() ) {
 543                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 544                                         $this->reader->name == 'logitem' ) {
 545                                 break;
 546                         }
 547
 548                         $tag = $this->reader->name;
 549
 550                         if ( !wfRunHooks( 'ImportHandleLogItemXMLTag', array(
 551                                 $this, $logInfo
 552                         ) ) ) {
 553                                 // Do nothing
 554                         } elseif ( in_array( $tag, $normalFields ) ) {
 555                                 $logInfo[$tag] = $this->nodeContents();
 556                         } elseif ( $tag == 'contributor' ) {
 557                                 $logInfo['contributor'] = $this->handleContributor();
 558                         } elseif ( $tag != '#text' ) {
 559                                 $this->warn( "Unhandled log-item XML tag $tag" );
 560                         }
 561                 }
 562
 563                 $this->processLogItem( $logInfo );
 564         }
 565
 566         /**
 567          * @param array $logInfo
 568          * @return bool|mixed
 569          */
 570         private function processLogItem( $logInfo ) {
 571                 $revision = new WikiRevision;
 572
 573                 $revision->setID( $logInfo['id'] );
 574                 $revision->setType( $logInfo['type'] );
 575                 $revision->setAction( $logInfo['action'] );
 576                 $revision->setTimestamp( $logInfo['timestamp'] );
 577                 $revision->setParams( $logInfo['params'] );
 578                 $revision->setTitle( Title::newFromText( $logInfo['logtitle'] ) );
 579                 $revision->setNoUpdates( $this->mNoUpdates );
 580
 581                 if ( isset( $logInfo['comment'] ) ) {
 582                         $revision->setComment( $logInfo['comment'] );
 583                 }
 584
 585                 if ( isset( $logInfo['contributor']['ip'] ) ) {
 586                         $revision->setUserIP( $logInfo['contributor']['ip'] );
 587                 }
 588                 if ( isset( $logInfo['contributor']['username'] ) ) {
 589                         $revision->setUserName( $logInfo['contributor']['username'] );
 590                 }
 591
 592                 return $this->logItemCallback( $revision );
 593         }
 594
 595         private function handlePage() {
 596                 // Handle page data.
 597                 $this->debug( "Enter page handler." );
 598                 $pageInfo = array( 'revisionCount' => 0, 'successfulRevisionCount' => 0 );
 599
 600                 // Fields that can just be stuffed in the pageInfo object
 601                 $normalFields = array( 'title', 'id', 'redirect', 'restrictions' );
 602
 603                 $skip = false;
 604                 $badTitle = false;
 605
 606                 while ( $skip ? $this->reader->next() : $this->reader->read() ) {
 607                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 608                                         $this->reader->name == 'page' ) {
 609                                 break;
 610                         }
 611
 612                         $tag = $this->reader->name;
 613
 614                         if ( $badTitle ) {
 615                                 // The title is invalid, bail out of this page
 616                                 $skip = true;
 617                         } elseif ( !wfRunHooks( 'ImportHandlePageXMLTag', array( $this,
 618                                                 &$pageInfo ) ) ) {
 619                                 // Do nothing
 620                         } elseif ( in_array( $tag, $normalFields ) ) {
 621                                 $pageInfo[$tag] = $this->nodeContents();
 622                                 if ( $tag == 'title' ) {
 623                                         $title = $this->processTitle( $pageInfo['title'] );
 624
 625                                         if ( !$title ) {
 626                                                 $badTitle = true;
 627                                                 $skip = true;
 628                                         }
 629
 630                                         $this->pageCallback( $title );
 631                                         list( $pageInfo['_title'], $origTitle ) = $title;
 632                                 }
 633                         } elseif ( $tag == 'revision' ) {
 634                                 $this->handleRevision( $pageInfo );
 635                         } elseif ( $tag == 'upload' ) {
 636                                 $this->handleUpload( $pageInfo );
 637                         } elseif ( $tag != '#text' ) {
 638                                 $this->warn( "Unhandled page XML tag $tag" );
 639                                 $skip = true;
 640                         }
 641                 }
 642
 643                 $this->pageOutCallback( $pageInfo['_title'], $origTitle,
 644                                         $pageInfo['revisionCount'],
 645                                         $pageInfo['successfulRevisionCount'],
 646                                         $pageInfo );
 647         }
 648
 649         /**
 650          * @param array $pageInfo
 651          */
 652         private function handleRevision( &$pageInfo ) {
 653                 $this->debug( "Enter revision handler" );
 654                 $revisionInfo = array();
 655
 656                 $normalFields = array( 'id', 'timestamp', 'comment', 'minor', 'model', 'format', 'text' );
 657
 658                 $skip = false;
 659
 660                 while ( $skip ? $this->reader->next() : $this->reader->read() ) {
 661                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 662                                         $this->reader->name == 'revision' ) {
 663                                 break;
 664                         }
 665
 666                         $tag = $this->reader->name;
 667
 668                         if ( !wfRunHooks( 'ImportHandleRevisionXMLTag', array(
 669                                 $this, $pageInfo, $revisionInfo
 670                         ) ) ) {
 671                                 // Do nothing
 672                         } elseif ( in_array( $tag, $normalFields ) ) {
 673                                 $revisionInfo[$tag] = $this->nodeContents();
 674                         } elseif ( $tag == 'contributor' ) {
 675                                 $revisionInfo['contributor'] = $this->handleContributor();
 676                         } elseif ( $tag != '#text' ) {
 677                                 $this->warn( "Unhandled revision XML tag $tag" );
 678                                 $skip = true;
 679                         }
 680                 }
 681
 682                 $pageInfo['revisionCount']++;
 683                 if ( $this->processRevision( $pageInfo, $revisionInfo ) ) {
 684                         $pageInfo['successfulRevisionCount']++;
 685                 }
 686         }
 687
 688         /**
 689          * @param array $pageInfo
 690          * @param array $revisionInfo
 691          * @return bool|mixed
 692          */
 693         private function processRevision( $pageInfo, $revisionInfo ) {
 694                 $revision = new WikiRevision;
 695
 696                 if ( isset( $revisionInfo['id'] ) ) {
 697                         $revision->setID( $revisionInfo['id'] );
 698                 }
 699                 if ( isset( $revisionInfo['model'] ) ) {
 700                         $revision->setModel( $revisionInfo['model'] );
 701                 }
 702                 if ( isset( $revisionInfo['format'] ) ) {
 703                         $revision->setFormat( $revisionInfo['format'] );
 704                 }
 705                 $revision->setTitle( $pageInfo['_title'] );
 706
 707                 if ( isset( $revisionInfo['text'] ) ) {
 708                         $handler = $revision->getContentHandler();
 709                         $text = $handler->importTransform(
 710                                 $revisionInfo['text'],
 711                                 $revision->getFormat() );
 712
 713                         $revision->setText( $text );
 714                 }
 715                 if ( isset( $revisionInfo['timestamp'] ) ) {
 716                         $revision->setTimestamp( $revisionInfo['timestamp'] );
 717                 } else {
 718                         $revision->setTimestamp( wfTimestampNow() );
 719                 }
 720
 721                 if ( isset( $revisionInfo['comment'] ) ) {
 722                         $revision->setComment( $revisionInfo['comment'] );
 723                 }
 724
 725                 if ( isset( $revisionInfo['minor'] ) ) {
 726                         $revision->setMinor( true );
 727                 }
 728                 if ( isset( $revisionInfo['contributor']['ip'] ) ) {
 729                         $revision->setUserIP( $revisionInfo['contributor']['ip'] );
 730                 }
 731                 if ( isset( $revisionInfo['contributor']['username'] ) ) {
 732                         $revision->setUserName( $revisionInfo['contributor']['username'] );
 733                 }
 734                 $revision->setNoUpdates( $this->mNoUpdates );
 735
 736                 return $this->revisionCallback( $revision );
 737         }
 738
 739         /**
 740          * @param array $pageInfo
 741          * @return mixed
 742          */
 743         private function handleUpload( &$pageInfo ) {
 744                 $this->debug( "Enter upload handler" );
 745                 $uploadInfo = array();
 746
 747                 $normalFields = array( 'timestamp', 'comment', 'filename', 'text',
 748                                         'src', 'size', 'sha1base36', 'archivename', 'rel' );
 749
 750                 $skip = false;
 751
 752                 while ( $skip ? $this->reader->next() : $this->reader->read() ) {
 753                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 754                                         $this->reader->name == 'upload' ) {
 755                                 break;
 756                         }
 757
 758                         $tag = $this->reader->name;
 759
 760                         if ( !wfRunHooks( 'ImportHandleUploadXMLTag', array(
 761                                 $this, $pageInfo
 762                         ) ) ) {
 763                                 // Do nothing
 764                         } elseif ( in_array( $tag, $normalFields ) ) {
 765                                 $uploadInfo[$tag] = $this->nodeContents();
 766                         } elseif ( $tag == 'contributor' ) {
 767                                 $uploadInfo['contributor'] = $this->handleContributor();
 768                         } elseif ( $tag == 'contents' ) {
 769                                 $contents = $this->nodeContents();
 770                                 $encoding = $this->reader->getAttribute( 'encoding' );
 771                                 if ( $encoding === 'base64' ) {
 772                                         $uploadInfo['fileSrc'] = $this->dumpTemp( base64_decode( $contents ) );
 773                                         $uploadInfo['isTempSrc'] = true;
 774                                 }
 775                         } elseif ( $tag != '#text' ) {
 776                                 $this->warn( "Unhandled upload XML tag $tag" );
 777                                 $skip = true;
 778                         }
 779                 }
 780
 781                 if ( $this->mImageBasePath && isset( $uploadInfo['rel'] ) ) {
 782                         $path = "{$this->mImageBasePath}/{$uploadInfo['rel']}";
 783                         if ( file_exists( $path ) ) {
 784                                 $uploadInfo['fileSrc'] = $path;
 785                                 $uploadInfo['isTempSrc'] = false;
 786                         }
 787                 }
 788
 789                 if ( $this->mImportUploads ) {
 790                         return $this->processUpload( $pageInfo, $uploadInfo );
 791                 }
 792         }
 793
 794         /**
 795          * @param string $contents
 796          * @return string
 797          */
 798         private function dumpTemp( $contents ) {
 799                 $filename = tempnam( wfTempDir(), 'importupload' );
 800                 file_put_contents( $filename, $contents );
 801                 return $filename;
 802         }
 803
 804         /**
 805          * @param array $pageInfo
 806          * @param array $uploadInfo
 807          * @return mixed
 808          */
 809         private function processUpload( $pageInfo, $uploadInfo ) {
 810                 $revision = new WikiRevision;
 811                 $text = isset( $uploadInfo['text'] ) ? $uploadInfo['text'] : '';
 812
 813                 $revision->setTitle( $pageInfo['_title'] );
 814                 $revision->setID( $pageInfo['id'] );
 815                 $revision->setTimestamp( $uploadInfo['timestamp'] );
 816                 $revision->setText( $text );
 817                 $revision->setFilename( $uploadInfo['filename'] );
 818                 if ( isset( $uploadInfo['archivename'] ) ) {
 819                         $revision->setArchiveName( $uploadInfo['archivename'] );
 820                 }
 821                 $revision->setSrc( $uploadInfo['src'] );
 822                 if ( isset( $uploadInfo['fileSrc'] ) ) {
 823                         $revision->setFileSrc( $uploadInfo['fileSrc'],
 824                                 !empty( $uploadInfo['isTempSrc'] ) );
 825                 }
 826                 if ( isset( $uploadInfo['sha1base36'] ) ) {
 827                         $revision->setSha1Base36( $uploadInfo['sha1base36'] );
 828                 }
 829                 $revision->setSize( intval( $uploadInfo['size'] ) );
 830                 $revision->setComment( $uploadInfo['comment'] );
 831
 832                 if ( isset( $uploadInfo['contributor']['ip'] ) ) {
 833                         $revision->setUserIP( $uploadInfo['contributor']['ip'] );
 834                 }
 835                 if ( isset( $uploadInfo['contributor']['username'] ) ) {
 836                         $revision->setUserName( $uploadInfo['contributor']['username'] );
 837                 }
 838                 $revision->setNoUpdates( $this->mNoUpdates );
 839
 840                 return call_user_func( $this->mUploadCallback, $revision );
 841         }
 842
 843         /**
 844          * @return array
 845          */
 846         private function handleContributor() {
 847                 $fields = array( 'id', 'ip', 'username' );
 848                 $info = array();
 849
 850                 while ( $this->reader->read() ) {
 851                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 852                                         $this->reader->name == 'contributor' ) {
 853                                 break;
 854                         }
 855
 856                         $tag = $this->reader->name;
 857
 858                         if ( in_array( $tag, $fields ) ) {
 859                                 $info[$tag] = $this->nodeContents();
 860                         }
 861                 }
 862
 863                 return $info;
 864         }
 865
 866         /**
 867          * @param string $text
 868          * @return array|bool
 869          */
 870         private function processTitle( $text ) {
 871                 global $wgCommandLineMode;
 872
 873                 $workTitle = $text;
 874                 $origTitle = Title::newFromText( $workTitle );
 875
 876                 if ( !is_null( $this->mTargetNamespace ) && !is_null( $origTitle ) ) {
 877                         # makeTitleSafe, because $origTitle can have a interwiki (different setting of interwiki map)
 878                         # and than dbKey can begin with a lowercase char
 879                         $title = Title::makeTitleSafe( $this->mTargetNamespace,
 880                                 $origTitle->getDBkey() );
 881                 } else {
 882                         if ( !is_null( $this->mTargetRootPage ) ) {
 883                                 $workTitle = $this->mTargetRootPage . '/' . $workTitle;
 884                         }
 885                         $title = Title::newFromText( $workTitle );
 886                 }
 887
 888                 if ( is_null( $title ) ) {
 889                         # Invalid page title? Ignore the page
 890                         $this->notice( 'import-error-invalid', $workTitle );
 891                         return false;
 892                 } elseif ( $title->isExternal() ) {
 893                         $this->notice( 'import-error-interwiki', $title->getPrefixedText() );
 894                         return false;
 895                 } elseif ( !$title->canExist() ) {
 896                         $this->notice( 'import-error-special', $title->getPrefixedText() );
 897                         return false;
 898                 } elseif ( !$title->userCan( 'edit' ) && !$wgCommandLineMode ) {
 899                         # Do not import if the importing wiki user cannot edit this page
 900                         $this->notice( 'import-error-edit', $title->getPrefixedText() );
 901                         return false;
 902                 } elseif ( !$title->exists() && !$title->userCan( 'create' ) && !$wgCommandLineMode ) {
 903                         # Do not import if the importing wiki user cannot create this page
 904                         $this->notice( 'import-error-create', $title->getPrefixedText() );
 905                         return false;
 906                 }
 907
 908                 return array( $title, $origTitle );
 909         }
 910 }
 911
 912 /** This is a horrible hack used to keep source compatibility */
 913 class UploadSourceAdapter {
 914         /** @var array */
 915         private static $sourceRegistrations = array();
 916
 917         /** @var string */
 918         private $mSource;
 919
 920         /** @var string */
 921         private $mBuffer;
 922
 923         /** @var int */
 924         private $mPosition;
 925
 926         /**
 927          * @param string $source
 928          * @return string
 929          */
 930         static function registerSource( $source ) {
 931                 $id = wfRandomString();
 932
 933                 self::$sourceRegistrations[$id] = $source;
 934
 935                 return $id;
 936         }
 937
 938         /**
 939          * @param string $path
 940          * @param string $mode
 941          * @param array $options
 942          * @param string $opened_path
 943          * @return bool
 944          */
 945         function stream_open( $path, $mode, $options, &$opened_path ) {
 946                 $url = parse_url( $path );
 947                 $id = $url['host'];
 948
 949                 if ( !isset( self::$sourceRegistrations[$id] ) ) {
 950                         return false;
 951                 }
 952
 953                 $this->mSource = self::$sourceRegistrations[$id];
 954
 955                 return true;
 956         }
 957
 958         /**
 959          * @param int $count
 960          * @return string
 961          */
 962         function stream_read( $count ) {
 963                 $return = '';
 964                 $leave = false;
 965
 966                 while ( !$leave && !$this->mSource->atEnd() &&
 967                                 strlen( $this->mBuffer ) < $count ) {
 968                         $read = $this->mSource->readChunk();
 969
 970                         if ( !strlen( $read ) ) {
 971                                 $leave = true;
 972                         }
 973
 974                         $this->mBuffer .= $read;
 975                 }
 976
 977                 if ( strlen( $this->mBuffer ) ) {
 978                         $return = substr( $this->mBuffer, 0, $count );
 979                         $this->mBuffer = substr( $this->mBuffer, $count );
 980                 }
 981
 982                 $this->mPosition += strlen( $return );
 983
 984                 return $return;
 985         }
 986
 987         /**
 988          * @param string $data
 989          * @return bool
 990          */
 991         function stream_write( $data ) {
 992                 return false;
 993         }
 994
 995         /**
 996          * @return mixed
 997          */
 998         function stream_tell() {
 999                 return $this->mPosition;
1000         }
1001
1002         /**
1003          * @return bool
1004          */
1005         function stream_eof() {
1006                 return $this->mSource->atEnd();
1007         }
1008
1009         /**
1010          * @return array
1011          */
1012         function url_stat() {
1013                 $result = array();
1014
1015                 $result['dev'] = $result[0] = 0;
1016                 $result['ino'] = $result[1] = 0;
1017                 $result['mode'] = $result[2] = 0;
1018                 $result['nlink'] = $result[3] = 0;
1019                 $result['uid'] = $result[4] = 0;
1020                 $result['gid'] = $result[5] = 0;
1021                 $result['rdev'] = $result[6] = 0;
1022                 $result['size'] = $result[7] = 0;
1023                 $result['atime'] = $result[8] = 0;
1024                 $result['mtime'] = $result[9] = 0;
1025                 $result['ctime'] = $result[10] = 0;
1026                 $result['blksize'] = $result[11] = 0;
1027                 $result['blocks'] = $result[12] = 0;
1028
1029                 return $result;
1030         }
1031 }
1032
1033 class XMLReader2 extends XMLReader {
1034
1035         /**
1036          * @return bool|string
1037          */
1038         function nodeContents() {
1039                 if ( $this->isEmptyElement ) {
1040                         return "";
1041                 }
1042                 $buffer = "";
1043                 while ( $this->read() ) {
1044                         switch ( $this->nodeType ) {
1045                         case XmlReader::TEXT:
1046                         case XmlReader::SIGNIFICANT_WHITESPACE:
1047                                 $buffer .= $this->value;
1048                                 break;
1049                         case XmlReader::END_ELEMENT:
1050                                 return $buffer;
1051                         }
1052                 }
1053                 return $this->close();
1054         }
1055 }
1056
1057 /**
1058  * @todo document (e.g. one-sentence class description).
1059  * @ingroup SpecialPage
1060  */
1061 class WikiRevision {
1062         /** @todo Unused? */
1063         private $importer = null;
1064
1065         /** @var Title */
1066         public $title = null;
1067
1068         /** @var int */
1069         private $id = 0;
1070
1071         /** @var string */
1072         public $timestamp = "20010115000000";
1073
1074         /**
1075          * @var int
1076          * @todo Can't find any uses. Public, because that's suspicious. Get clarity. */
1077         public $user = 0;
1078
1079         /** @var string */
1080         public $user_text = "";
1081
1082         /** @var string */
1083         protected $model = null;
1084
1085         /** @var string */
1086         protected $format = null;
1087
1088         /** @var string */
1089         public $text = "";
1090
1091         /** @var int */
1092         protected $size;
1093
1094         /** @var Content */
1095         protected $content = null;
1096
1097         /** @var ContentHandler */
1098         protected $contentHandler = null;
1099
1100         /** @var string */
1101         public $comment = "";
1102
1103         /** @var bool */
1104         protected $minor = false;
1105
1106         /** @var string */
1107         protected $type = "";
1108
1109         /** @var string */
1110         protected $action = "";
1111
1112         /** @var string */
1113         protected $params = "";
1114
1115         /** @var string */
1116         protected $fileSrc = '';
1117
1118         /** @var bool|string */
1119         protected $sha1base36 = false;
1120
1121         /**
1122          * @var bool
1123          * @todo Unused?
1124          */
1125         private $isTemp = false;
1126
1127         /** @var string */
1128         protected $archiveName = '';
1129
1130         protected $filename;
1131
1132         /** @var mixed */
1133         protected $src;
1134
1135         /** @todo Unused? */
1136         private $fileIsTemp;
1137
1138         /** @var bool */
1139         private $mNoUpdates = false;
1140
1141         /**
1142          * @param Title $title
1143          * @throws MWException
1144          */
1145         function setTitle( $title ) {
1146                 if ( is_object( $title ) ) {
1147                         $this->title = $title;
1148                 } elseif ( is_null( $title ) ) {
1149                         throw new MWException( "WikiRevision given a null title in import. "
1150                                 . "You may need to adjust \$wgLegalTitleChars." );
1151                 } else {
1152                         throw new MWException( "WikiRevision given non-object title in import." );
1153                 }
1154         }
1155
1156         /**
1157          * @param int $id
1158          */
1159         function setID( $id ) {
1160                 $this->id = $id;
1161         }
1162
1163         /**
1164          * @param string $ts
1165          */
1166         function setTimestamp( $ts ) {
1167                 # 2003-08-05T18:30:02Z
1168                 $this->timestamp = wfTimestamp( TS_MW, $ts );
1169         }
1170
1171         /**
1172          * @param string $user
1173          */
1174         function setUsername( $user ) {
1175                 $this->user_text = $user;
1176         }
1177
1178         /**
1179          * @param string $ip
1180          */
1181         function setUserIP( $ip ) {
1182                 $this->user_text = $ip;
1183         }
1184
1185         /**
1186          * @param string $model
1187          */
1188         function setModel( $model ) {
1189                 $this->model = $model;
1190         }
1191
1192         /**
1193          * @param string $format
1194          */
1195         function setFormat( $format ) {
1196                 $this->format = $format;
1197         }
1198
1199         /**
1200          * @param string $text
1201          */
1202         function setText( $text ) {
1203                 $this->text = $text;
1204         }
1205
1206         /**
1207          * @param string $text
1208          */
1209         function setComment( $text ) {
1210                 $this->comment = $text;
1211         }
1212
1213         /**
1214          * @param bool $minor
1215          */
1216         function setMinor( $minor ) {
1217                 $this->minor = (bool)$minor;
1218         }
1219
1220         /**
1221          * @param mixed $src
1222          */
1223         function setSrc( $src ) {
1224                 $this->src = $src;
1225         }
1226
1227         /**
1228          * @param string $src
1229          * @param bool $isTemp
1230          */
1231         function setFileSrc( $src, $isTemp ) {
1232                 $this->fileSrc = $src;
1233                 $this->fileIsTemp = $isTemp;
1234         }
1235
1236         /**
1237          * @param string $sha1base36
1238          */
1239         function setSha1Base36( $sha1base36 ) {
1240                 $this->sha1base36 = $sha1base36;
1241         }
1242
1243         /**
1244          * @param string $filename
1245          */
1246         function setFilename( $filename ) {
1247                 $this->filename = $filename;
1248         }
1249
1250         /**
1251          * @param string $archiveName
1252          */
1253         function setArchiveName( $archiveName ) {
1254                 $this->archiveName = $archiveName;
1255         }
1256
1257         /**
1258          * @param int $size
1259          */
1260         function setSize( $size ) {
1261                 $this->size = intval( $size );
1262         }
1263
1264         /**
1265          * @param string $type
1266          */
1267         function setType( $type ) {
1268                 $this->type = $type;
1269         }
1270
1271         /**
1272          * @param string $action
1273          */
1274         function setAction( $action ) {
1275                 $this->action = $action;
1276         }
1277
1278         /**
1279          * @param array $params
1280          */
1281         function setParams( $params ) {
1282                 $this->params = $params;
1283         }
1284
1285         /**
1286          * @param bool $noupdates
1287          */
1288         public function setNoUpdates( $noupdates ) {
1289                 $this->mNoUpdates = $noupdates;
1290         }
1291
1292         /**
1293          * @return Title
1294          */
1295         function getTitle() {
1296                 return $this->title;
1297         }
1298
1299         /**
1300          * @return int
1301          */
1302         function getID() {
1303                 return $this->id;
1304         }
1305
1306         /**
1307          * @return string
1308          */
1309         function getTimestamp() {
1310                 return $this->timestamp;
1311         }
1312
1313         /**
1314          * @return string
1315          */
1316         function getUser() {
1317                 return $this->user_text;
1318         }
1319
1320         /**
1321          * @return string
1322          *
1323          * @deprecated Since 1.21, use getContent() instead.
1324          */
1325         function getText() {
1326                 ContentHandler::deprecated( __METHOD__, '1.21' );
1327
1328                 return $this->text;
1329         }
1330
1331         /**
1332          * @return ContentHandler
1333          */
1334         function getContentHandler() {
1335                 if ( is_null( $this->contentHandler ) ) {
1336                         $this->contentHandler = ContentHandler::getForModelID( $this->getModel() );
1337                 }
1338
1339                 return $this->contentHandler;
1340         }
1341
1342         /**
1343          * @return Content
1344          */
1345         function getContent() {
1346                 if ( is_null( $this->content ) ) {
1347                         $handler = $this->getContentHandler();
1348                         $this->content = $handler->unserializeContent( $this->text, $this->getFormat() );
1349                 }
1350
1351                 return $this->content;
1352         }
1353
1354         /**
1355          * @return string
1356          */
1357         function getModel() {
1358                 if ( is_null( $this->model ) ) {
1359                         $this->model = $this->getTitle()->getContentModel();
1360                 }
1361
1362                 return $this->model;
1363         }
1364
1365         /**
1366          * @return string
1367          */
1368         function getFormat() {
1369                 if ( is_null( $this->format ) ) {
1370                         $this->format = $this->getContentHandler()->getDefaultFormat();
1371                 }
1372
1373                 return $this->format;
1374         }
1375
1376         /**
1377          * @return string
1378          */
1379         function getComment() {
1380                 return $this->comment;
1381         }
1382
1383         /**
1384          * @return bool
1385          */
1386         function getMinor() {
1387                 return $this->minor;
1388         }
1389
1390         /**
1391          * @return mixed
1392          */
1393         function getSrc() {
1394                 return $this->src;
1395         }
1396
1397         /**
1398          * @return bool|string
1399          */
1400         function getSha1() {
1401                 if ( $this->sha1base36 ) {
1402                         return wfBaseConvert( $this->sha1base36, 36, 16 );
1403                 }
1404                 return false;
1405         }
1406
1407         /**
1408          * @return string
1409          */
1410         function getFileSrc() {
1411                 return $this->fileSrc;
1412         }
1413
1414         /**
1415          * @return bool
1416          */
1417         function isTempSrc() {
1418                 return $this->isTemp;
1419         }
1420
1421         /**
1422          * @return mixed
1423          */
1424         function getFilename() {
1425                 return $this->filename;
1426         }
1427
1428         /**
1429          * @return string
1430          */
1431         function getArchiveName() {
1432                 return $this->archiveName;
1433         }
1434
1435         /**
1436          * @return mixed
1437          */
1438         function getSize() {
1439                 return $this->size;
1440         }
1441
1442         /**
1443          * @return string
1444          */
1445         function getType() {
1446                 return $this->type;
1447         }
1448
1449         /**
1450          * @return string
1451          */
1452         function getAction() {
1453                 return $this->action;
1454         }
1455
1456         /**
1457          * @return string
1458          */
1459         function getParams() {
1460                 return $this->params;
1461         }
1462
1463         /**
1464          * @return bool
1465          */
1466         function importOldRevision() {
1467                 $dbw = wfGetDB( DB_MASTER );
1468
1469                 # Sneak a single revision into place
1470                 $user = User::newFromName( $this->getUser() );
1471                 if ( $user ) {
1472                         $userId = intval( $user->getId() );
1473                         $userText = $user->getName();
1474                         $userObj = $user;
1475                 } else {
1476                         $userId = 0;
1477                         $userText = $this->getUser();
1478                         $userObj = new User;
1479                 }
1480
1481                 // avoid memory leak...?
1482                 $linkCache = LinkCache::singleton();
1483                 $linkCache->clear();
1484
1485                 $page = WikiPage::factory( $this->title );
1486                 if ( !$page->exists() ) {
1487                         # must create the page...
1488                         $pageId = $page->insertOn( $dbw );
1489                         $created = true;
1490                         $oldcountable = null;
1491                 } else {
1492                         $pageId = $page->getId();
1493                         $created = false;
1494
1495                         $prior = $dbw->selectField( 'revision', '1',
1496                                 array( 'rev_page' => $pageId,
1497                                         'rev_timestamp' => $dbw->timestamp( $this->timestamp ),
1498                                         'rev_user_text' => $userText,
1499                                         'rev_comment' => $this->getComment() ),
1500                                 __METHOD__
1501                         );
1502                         if ( $prior ) {
1503                                 // @todo FIXME: This could fail slightly for multiple matches :P
1504                                 wfDebug( __METHOD__ . ": skipping existing revision for [[" .
1505                                         $this->title->getPrefixedText() . "]], timestamp " . $this->timestamp . "\n" );
1506                                 return false;
1507                         }
1508                         $oldcountable = $page->isCountable();
1509                 }
1510
1511                 # @todo FIXME: Use original rev_id optionally (better for backups)
1512                 # Insert the row
1513                 $revision = new Revision( array(
1514                         'title' => $this->title,
1515                         'page' => $pageId,
1516                         'content_model' => $this->getModel(),
1517                         'content_format' => $this->getFormat(),
1518                         //XXX: just set 'content' => $this->getContent()?
1519                         'text' => $this->getContent()->serialize( $this->getFormat() ),
1520                         'comment' => $this->getComment(),
1521                         'user' => $userId,
1522                         'user_text' => $userText,
1523                         'timestamp' => $this->timestamp,
1524                         'minor_edit' => $this->minor,
1525                         ) );
1526                 $revision->insertOn( $dbw );
1527                 $changed = $page->updateIfNewerOn( $dbw, $revision );
1528
1529                 if ( $changed !== false && !$this->mNoUpdates ) {
1530                         wfDebug( __METHOD__ . ": running updates\n" );
1531                         $page->doEditUpdates(
1532                                 $revision,
1533                                 $userObj,
1534                                 array( 'created' => $created, 'oldcountable' => $oldcountable )
1535                         );
1536                 }
1537
1538                 return true;
1539         }
1540
1541         /**
1542          * @return mixed
1543          */
1544         function importLogItem() {
1545                 $dbw = wfGetDB( DB_MASTER );
1546                 # @todo FIXME: This will not record autoblocks
1547                 if ( !$this->getTitle() ) {
1548                         wfDebug( __METHOD__ . ": skipping invalid {$this->type}/{$this->action} log time, timestamp " .
1549                                 $this->timestamp . "\n" );
1550                         return;
1551                 }
1552                 # Check if it exists already
1553                 // @todo FIXME: Use original log ID (better for backups)
1554                 $prior = $dbw->selectField( 'logging', '1',
1555                         array( 'log_type' => $this->getType(),
1556                                 'log_action' => $this->getAction(),
1557                                 'log_timestamp' => $dbw->timestamp( $this->timestamp ),
1558                                 'log_namespace' => $this->getTitle()->getNamespace(),
1559                                 'log_title' => $this->getTitle()->getDBkey(),
1560                                 'log_comment' => $this->getComment(),
1561                                 #'log_user_text' => $this->user_text,
1562                                 'log_params' => $this->params ),
1563                         __METHOD__
1564                 );
1565                 // @todo FIXME: This could fail slightly for multiple matches :P
1566                 if ( $prior ) {
1567                         wfDebug( __METHOD__
1568                                 . ": skipping existing item for Log:{$this->type}/{$this->action}, timestamp "
1569                                 . $this->timestamp . "\n" );
1570                         return;
1571                 }
1572                 $log_id = $dbw->nextSequenceValue( 'logging_log_id_seq' );
1573                 $data = array(
1574                         'log_id' => $log_id,
1575                         'log_type' => $this->type,
1576                         'log_action' => $this->action,
1577                         'log_timestamp' => $dbw->timestamp( $this->timestamp ),
1578                         'log_user' => User::idFromName( $this->user_text ),
1579                         #'log_user_text' => $this->user_text,
1580                         'log_namespace' => $this->getTitle()->getNamespace(),
1581                         'log_title' => $this->getTitle()->getDBkey(),
1582                         'log_comment' => $this->getComment(),
1583                         'log_params' => $this->params
1584                 );
1585                 $dbw->insert( 'logging', $data, __METHOD__ );
1586         }
1587
1588         /**
1589          * @return bool
1590          */
1591         function importUpload() {
1592                 # Construct a file
1593                 $archiveName = $this->getArchiveName();
1594                 if ( $archiveName ) {
1595                         wfDebug( __METHOD__ . "Importing archived file as $archiveName\n" );
1596                         $file = OldLocalFile::newFromArchiveName( $this->getTitle(),
1597                                 RepoGroup::singleton()->getLocalRepo(), $archiveName );
1598                 } else {
1599                         $file = wfLocalFile( $this->getTitle() );
1600                         wfDebug( __METHOD__ . 'Importing new file as ' . $file->getName() . "\n" );
1601                         if ( $file->exists() && $file->getTimestamp() > $this->getTimestamp() ) {
1602                                 $archiveName = $file->getTimestamp() . '!' . $file->getName();
1603                                 $file = OldLocalFile::newFromArchiveName( $this->getTitle(),
1604                                         RepoGroup::singleton()->getLocalRepo(), $archiveName );
1605                                 wfDebug( __METHOD__ . "File already exists; importing as $archiveName\n" );
1606                         }
1607                 }
1608                 if ( !$file ) {
1609                         wfDebug( __METHOD__ . ': Bad file for ' . $this->getTitle() . "\n" );
1610                         return false;
1611                 }
1612
1613                 # Get the file source or download if necessary
1614                 $source = $this->getFileSrc();
1615                 $flags = $this->isTempSrc() ? File::DELETE_SOURCE : 0;
1616                 if ( !$source ) {
1617                         $source = $this->downloadSource();
1618                         $flags |= File::DELETE_SOURCE;
1619                 }
1620                 if ( !$source ) {
1621                         wfDebug( __METHOD__ . ": Could not fetch remote file.\n" );
1622                         return false;
1623                 }
1624                 $sha1 = $this->getSha1();
1625                 if ( $sha1 && ( $sha1 !== sha1_file( $source ) ) ) {
1626                         if ( $flags & File::DELETE_SOURCE ) {
1627                                 # Broken file; delete it if it is a temporary file
1628                                 unlink( $source );
1629                         }
1630                         wfDebug( __METHOD__ . ": Corrupt file $source.\n" );
1631                         return false;
1632                 }
1633
1634                 $user = User::newFromName( $this->user_text );
1635
1636                 # Do the actual upload
1637                 if ( $archiveName ) {
1638                         $status = $file->uploadOld( $source, $archiveName,
1639                                 $this->getTimestamp(), $this->getComment(), $user, $flags );
1640                 } else {
1641                         $status = $file->upload( $source, $this->getComment(), $this->getComment(),
1642                                 $flags, false, $this->getTimestamp(), $user );
1643                 }
1644
1645                 if ( $status->isGood() ) {
1646                         wfDebug( __METHOD__ . ": Successful\n" );
1647                         return true;
1648                 } else {
1649                         wfDebug( __METHOD__ . ': failed: ' . $status->getXml() . "\n" );
1650                         return false;
1651                 }
1652         }
1653
1654         /**
1655          * @return bool|string
1656          */
1657         function downloadSource() {
1658                 global $wgEnableUploads;
1659                 if ( !$wgEnableUploads ) {
1660                         return false;
1661                 }
1662
1663                 $tempo = tempnam( wfTempDir(), 'download' );
1664                 $f = fopen( $tempo, 'wb' );
1665                 if ( !$f ) {
1666                         wfDebug( "IMPORT: couldn't write to temp file $tempo\n" );
1667                         return false;
1668                 }
1669
1670                 // @todo FIXME!
1671                 $src = $this->getSrc();
1672                 $data = Http::get( $src );
1673                 if ( !$data ) {
1674                         wfDebug( "IMPORT: couldn't fetch source $src\n" );
1675                         fclose( $f );
1676                         unlink( $tempo );
1677                         return false;
1678                 }
1679
1680                 fwrite( $f, $data );
1681                 fclose( $f );
1682
1683                 return $tempo;
1684         }
1685
1686 }
1687
1688 /**
1689  * @todo document (e.g. one-sentence class description).
1690  * @ingroup SpecialPage
1691  */
1692 class ImportStringSource {
1693         function __construct( $string ) {
1694                 $this->mString = $string;
1695                 $this->mRead = false;
1696         }
1697
1698         /**
1699          * @return bool
1700          */
1701         function atEnd() {
1702                 return $this->mRead;
1703         }
1704
1705         /**
1706          * @return bool|string
1707          */
1708         function readChunk() {
1709                 if ( $this->atEnd() ) {
1710                         return false;
1711                 }
1712                 $this->mRead = true;
1713                 return $this->mString;
1714         }
1715 }
1716
1717 /**
1718  * @todo document (e.g. one-sentence class description).
1719  * @ingroup SpecialPage
1720  */
1721 class ImportStreamSource {
1722         function __construct( $handle ) {
1723                 $this->mHandle = $handle;
1724         }
1725
1726         /**
1727          * @return bool
1728          */
1729         function atEnd() {
1730                 return feof( $this->mHandle );
1731         }
1732
1733         /**
1734          * @return string
1735          */
1736         function readChunk() {
1737                 return fread( $this->mHandle, 32768 );
1738         }
1739
1740         /**
1741          * @param string $filename
1742          * @return Status
1743          */
1744         static function newFromFile( $filename ) {
1745                 wfSuppressWarnings();
1746                 $file = fopen( $filename, 'rt' );
1747                 wfRestoreWarnings();
1748                 if ( !$file ) {
1749                         return Status::newFatal( "importcantopen" );
1750                 }
1751                 return Status::newGood( new ImportStreamSource( $file ) );
1752         }
1753
1754         /**
1755          * @param string $fieldname
1756          * @return Status
1757          */
1758         static function newFromUpload( $fieldname = "xmlimport" ) {
1759                 $upload =& $_FILES[$fieldname];
1760
1761                 if ( $upload === null || !$upload['name'] ) {
1762                         return Status::newFatal( 'importnofile' );
1763                 }
1764                 if ( !empty( $upload['error'] ) ) {
1765                         switch ( $upload['error'] ) {
1766                                 case 1:
1767                                         # The uploaded file exceeds the upload_max_filesize directive in php.ini.
1768                                         return Status::newFatal( 'importuploaderrorsize' );
1769                                 case 2:
1770                                         # The uploaded file exceeds the MAX_FILE_SIZE directive that
1771                                         # was specified in the HTML form.
1772                                         return Status::newFatal( 'importuploaderrorsize' );
1773                                 case 3:
1774                                         # The uploaded file was only partially uploaded
1775                                         return Status::newFatal( 'importuploaderrorpartial' );
1776                                 case 6:
1777                                         # Missing a temporary folder.
1778                                         return Status::newFatal( 'importuploaderrortemp' );
1779                                 # case else: # Currently impossible
1780                         }
1781
1782                 }
1783                 $fname = $upload['tmp_name'];
1784                 if ( is_uploaded_file( $fname ) ) {
1785                         return ImportStreamSource::newFromFile( $fname );
1786                 } else {
1787                         return Status::newFatal( 'importnofile' );
1788                 }
1789         }
1790
1791         /**
1792          * @param string $url
1793          * @param string $method
1794          * @return Status
1795          */
1796         static function newFromURL( $url, $method = 'GET' ) {
1797                 wfDebug( __METHOD__ . ": opening $url\n" );
1798                 # Use the standard HTTP fetch function; it times out
1799                 # quicker and sorts out user-agent problems which might
1800                 # otherwise prevent importing from large sites, such
1801                 # as the Wikimedia cluster, etc.
1802                 $data = Http::request( $method, $url, array( 'followRedirects' => true ) );
1803                 if ( $data !== false ) {
1804                         $file = tmpfile();
1805                         fwrite( $file, $data );
1806                         fflush( $file );
1807                         fseek( $file, 0 );
1808                         return Status::newGood( new ImportStreamSource( $file ) );
1809                 } else {
1810                         return Status::newFatal( 'importcantopen' );
1811                 }
1812         }
1813
1814         /**
1815          * @param string $interwiki
1816          * @param string $page
1817          * @param bool $history
1818          * @param bool $templates
1819          * @param int $pageLinkDepth
1820          * @return Status
1821          */
1822         public static function newFromInterwiki( $interwiki, $page, $history = false,
1823                 $templates = false, $pageLinkDepth = 0
1824         ) {
1825                 if ( $page == '' ) {
1826                         return Status::newFatal( 'import-noarticle' );
1827                 }
1828                 $link = Title::newFromText( "$interwiki:Special:Export/$page" );
1829                 if ( is_null( $link ) || !$link->isExternal() ) {
1830                         return Status::newFatal( 'importbadinterwiki' );
1831                 } else {
1832                         $params = array();
1833                         if ( $history ) {
1834                                 $params['history'] = 1;
1835                         }
1836                         if ( $templates ) {
1837                                 $params['templates'] = 1;
1838                         }
1839                         if ( $pageLinkDepth ) {
1840                                 $params['pagelink-depth'] = $pageLinkDepth;
1841                         }
1842                         $url = $link->getFullURL( $params );
1843                         # For interwikis, use POST to avoid redirects.
1844                         return ImportStreamSource::newFromURL( $url, "POST" );
1845                 }
1846         }
1847 }