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