includes/upload/UploadBase.php

   1 <?php
   2 /**
   3  * Base class for the backend of file upload.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Upload
  22  */
  23
  24 /**
  25  * @defgroup Upload Upload related
  26  */
  27
  28 /**
  29  * @ingroup Upload
  30  *
  31  * UploadBase and subclasses are the backend of MediaWiki's file uploads.
  32  * The frontends are formed by ApiUpload and SpecialUpload.
  33  *
  34  * @author Brion Vibber
  35  * @author Bryan Tong Minh
  36  * @author Michael Dale
  37  */
  38 abstract class UploadBase {
  39         protected $mTempPath;
  40         protected $mDesiredDestName, $mDestName, $mRemoveTempFile, $mSourceType;
  41         protected $mTitle = false, $mTitleError = 0;
  42         protected $mFilteredName, $mFinalExtension;
  43         protected $mLocalFile, $mFileSize, $mFileProps;
  44         protected $mBlackListedExtensions;
  45         protected $mJavaDetected, $mSVGNSError;
  46
  47         protected static $safeXmlEncodings = array(
  48                 'UTF-8',
  49                 'ISO-8859-1',
  50                 'ISO-8859-2',
  51                 'UTF-16',
  52                 'UTF-32'
  53         );
  54
  55         const SUCCESS = 0;
  56         const OK = 0;
  57         const EMPTY_FILE = 3;
  58         const MIN_LENGTH_PARTNAME = 4;
  59         const ILLEGAL_FILENAME = 5;
  60         const OVERWRITE_EXISTING_FILE = 7; # Not used anymore; handled by verifyTitlePermissions()
  61         const FILETYPE_MISSING = 8;
  62         const FILETYPE_BADTYPE = 9;
  63         const VERIFICATION_ERROR = 10;
  64
  65         # HOOK_ABORTED is the new name of UPLOAD_VERIFICATION_ERROR
  66         const UPLOAD_VERIFICATION_ERROR = 11;
  67         const HOOK_ABORTED = 11;
  68         const FILE_TOO_LARGE = 12;
  69         const WINDOWS_NONASCII_FILENAME = 13;
  70         const FILENAME_TOO_LONG = 14;
  71
  72         const SESSION_STATUS_KEY = 'wsUploadStatusData';
  73
  74         /**
  75          * @param int $error
  76          * @return string
  77          */
  78         public function getVerificationErrorCode( $error ) {
  79                 $code_to_status = array(
  80                         self::EMPTY_FILE => 'empty-file',
  81                         self::FILE_TOO_LARGE => 'file-too-large',
  82                         self::FILETYPE_MISSING => 'filetype-missing',
  83                         self::FILETYPE_BADTYPE => 'filetype-banned',
  84                         self::MIN_LENGTH_PARTNAME => 'filename-tooshort',
  85                         self::ILLEGAL_FILENAME => 'illegal-filename',
  86                         self::OVERWRITE_EXISTING_FILE => 'overwrite',
  87                         self::VERIFICATION_ERROR => 'verification-error',
  88                         self::HOOK_ABORTED => 'hookaborted',
  89                         self::WINDOWS_NONASCII_FILENAME => 'windows-nonascii-filename',
  90                         self::FILENAME_TOO_LONG => 'filename-toolong',
  91                 );
  92                 if ( isset( $code_to_status[$error] ) ) {
  93                         return $code_to_status[$error];
  94                 }
  95
  96                 return 'unknown-error';
  97         }
  98
  99         /**
 100          * Returns true if uploads are enabled.
 101          * Can be override by subclasses.
 102          * @return bool
 103          */
 104         public static function isEnabled() {
 105                 global $wgEnableUploads;
 106
 107                 if ( !$wgEnableUploads ) {
 108                         return false;
 109                 }
 110
 111                 # Check php's file_uploads setting
 112                 return wfIsHHVM() || wfIniGetBool( 'file_uploads' );
 113         }
 114
 115         /**
 116          * Returns true if the user can use this upload module or else a string
 117          * identifying the missing permission.
 118          * Can be overridden by subclasses.
 119          *
 120          * @param User $user
 121          * @return bool|string
 122          */
 123         public static function isAllowed( $user ) {
 124                 foreach ( array( 'upload', 'edit' ) as $permission ) {
 125                         if ( !$user->isAllowed( $permission ) ) {
 126                                 return $permission;
 127                         }
 128                 }
 129
 130                 return true;
 131         }
 132
 133         // Upload handlers. Should probably just be a global.
 134         private static $uploadHandlers = array( 'Stash', 'File', 'Url' );
 135
 136         /**
 137          * Create a form of UploadBase depending on wpSourceType and initializes it
 138          *
 139          * @param WebRequest $request
 140          * @param string|null $type
 141          * @return null|UploadBase
 142          */
 143         public static function createFromRequest( &$request, $type = null ) {
 144                 $type = $type ? $type : $request->getVal( 'wpSourceType', 'File' );
 145
 146                 if ( !$type ) {
 147                         return null;
 148                 }
 149
 150                 // Get the upload class
 151                 $type = ucfirst( $type );
 152
 153                 // Give hooks the chance to handle this request
 154                 $className = null;
 155                 wfRunHooks( 'UploadCreateFromRequest', array( $type, &$className ) );
 156                 if ( is_null( $className ) ) {
 157                         $className = 'UploadFrom' . $type;
 158                         wfDebug( __METHOD__ . ": class name: $className\n" );
 159                         if ( !in_array( $type, self::$uploadHandlers ) ) {
 160                                 return null;
 161                         }
 162                 }
 163
 164                 // Check whether this upload class is enabled
 165                 if ( !call_user_func( array( $className, 'isEnabled' ) ) ) {
 166                         return null;
 167                 }
 168
 169                 // Check whether the request is valid
 170                 if ( !call_user_func( array( $className, 'isValidRequest' ), $request ) ) {
 171                         return null;
 172                 }
 173
 174                 $handler = new $className;
 175
 176                 $handler->initializeFromRequest( $request );
 177
 178                 return $handler;
 179         }
 180
 181         /**
 182          * Check whether a request if valid for this handler
 183          * @param WebRequest $request
 184          * @return bool
 185          */
 186         public static function isValidRequest( $request ) {
 187                 return false;
 188         }
 189
 190         public function __construct() {
 191         }
 192
 193         /**
 194          * Returns the upload type. Should be overridden by child classes
 195          *
 196          * @since 1.18
 197          * @return string
 198          */
 199         public function getSourceType() {
 200                 return null;
 201         }
 202
 203         /**
 204          * Initialize the path information
 205          * @param string $name The desired destination name
 206          * @param string $tempPath The temporary path
 207          * @param int $fileSize The file size
 208          * @param bool $removeTempFile (false) remove the temporary file?
 209          * @throws MWException
 210          */
 211         public function initializePathInfo( $name, $tempPath, $fileSize, $removeTempFile = false ) {
 212                 $this->mDesiredDestName = $name;
 213                 if ( FileBackend::isStoragePath( $tempPath ) ) {
 214                         throw new MWException( __METHOD__ . " given storage path `$tempPath`." );
 215                 }
 216                 $this->mTempPath = $tempPath;
 217                 $this->mFileSize = $fileSize;
 218                 $this->mRemoveTempFile = $removeTempFile;
 219         }
 220
 221         /**
 222          * Initialize from a WebRequest. Override this in a subclass.
 223          *
 224          * @param WebRequest $request
 225          */
 226         abstract public function initializeFromRequest( &$request );
 227
 228         /**
 229          * Fetch the file. Usually a no-op
 230          * @return Status
 231          */
 232         public function fetchFile() {
 233                 return Status::newGood();
 234         }
 235
 236         /**
 237          * Return true if the file is empty
 238          * @return bool
 239          */
 240         public function isEmptyFile() {
 241                 return empty( $this->mFileSize );
 242         }
 243
 244         /**
 245          * Return the file size
 246          * @return int
 247          */
 248         public function getFileSize() {
 249                 return $this->mFileSize;
 250         }
 251
 252         /**
 253          * Get the base 36 SHA1 of the file
 254          * @return string
 255          */
 256         public function getTempFileSha1Base36() {
 257                 return FSFile::getSha1Base36FromPath( $this->mTempPath );
 258         }
 259
 260         /**
 261          * @param string $srcPath The source path
 262          * @return string|bool The real path if it was a virtual URL Returns false on failure
 263          */
 264         function getRealPath( $srcPath ) {
 265                 wfProfileIn( __METHOD__ );
 266                 $repo = RepoGroup::singleton()->getLocalRepo();
 267                 if ( $repo->isVirtualUrl( $srcPath ) ) {
 268                         /** @todo Just make uploads work with storage paths UploadFromStash
 269                          *  loads files via virtual URLs.
 270                          */
 271                         $tmpFile = $repo->getLocalCopy( $srcPath );
 272                         if ( $tmpFile ) {
 273                                 $tmpFile->bind( $this ); // keep alive with $this
 274                         }
 275                         $path = $tmpFile ? $tmpFile->getPath() : false;
 276                 } else {
 277                         $path = $srcPath;
 278                 }
 279                 wfProfileOut( __METHOD__ );
 280
 281                 return $path;
 282         }
 283
 284         /**
 285          * Verify whether the upload is sane.
 286          * @return mixed Const self::OK or else an array with error information
 287          */
 288         public function verifyUpload() {
 289                 wfProfileIn( __METHOD__ );
 290
 291                 /**
 292                  * If there was no filename or a zero size given, give up quick.
 293                  */
 294                 if ( $this->isEmptyFile() ) {
 295                         wfProfileOut( __METHOD__ );
 296
 297                         return array( 'status' => self::EMPTY_FILE );
 298                 }
 299
 300                 /**
 301                  * Honor $wgMaxUploadSize
 302                  */
 303                 $maxSize = self::getMaxUploadSize( $this->getSourceType() );
 304                 if ( $this->mFileSize > $maxSize ) {
 305                         wfProfileOut( __METHOD__ );
 306
 307                         return array(
 308                                 'status' => self::FILE_TOO_LARGE,
 309                                 'max' => $maxSize,
 310                         );
 311                 }
 312
 313                 /**
 314                  * Look at the contents of the file; if we can recognize the
 315                  * type but it's corrupt or data of the wrong type, we should
 316                  * probably not accept it.
 317                  */
 318                 $verification = $this->verifyFile();
 319                 if ( $verification !== true ) {
 320                         wfProfileOut( __METHOD__ );
 321
 322                         return array(
 323                                 'status' => self::VERIFICATION_ERROR,
 324                                 'details' => $verification
 325                         );
 326                 }
 327
 328                 /**
 329                  * Make sure this file can be created
 330                  */
 331                 $result = $this->validateName();
 332                 if ( $result !== true ) {
 333                         wfProfileOut( __METHOD__ );
 334
 335                         return $result;
 336                 }
 337
 338                 $error = '';
 339                 if ( !wfRunHooks( 'UploadVerification',
 340                         array( $this->mDestName, $this->mTempPath, &$error ) )
 341                 ) {
 342                         wfProfileOut( __METHOD__ );
 343
 344                         return array( 'status' => self::HOOK_ABORTED, 'error' => $error );
 345                 }
 346
 347                 wfProfileOut( __METHOD__ );
 348
 349                 return array( 'status' => self::OK );
 350         }
 351
 352         /**
 353          * Verify that the name is valid and, if necessary, that we can overwrite
 354          *
 355          * @return mixed True if valid, otherwise and array with 'status'
 356          * and other keys
 357          */
 358         public function validateName() {
 359                 $nt = $this->getTitle();
 360                 if ( is_null( $nt ) ) {
 361                         $result = array( 'status' => $this->mTitleError );
 362                         if ( $this->mTitleError == self::ILLEGAL_FILENAME ) {
 363                                 $result['filtered'] = $this->mFilteredName;
 364                         }
 365                         if ( $this->mTitleError == self::FILETYPE_BADTYPE ) {
 366                                 $result['finalExt'] = $this->mFinalExtension;
 367                                 if ( count( $this->mBlackListedExtensions ) ) {
 368                                         $result['blacklistedExt'] = $this->mBlackListedExtensions;
 369                                 }
 370                         }
 371
 372                         return $result;
 373                 }
 374                 $this->mDestName = $this->getLocalFile()->getName();
 375
 376                 return true;
 377         }
 378
 379         /**
 380          * Verify the MIME type.
 381          *
 382          * @note Only checks that it is not an evil MIME. The "does it have
 383          *  correct extension given its MIME type?" check is in verifyFile.
 384          *  in `verifyFile()` that MIME type and file extension correlate.
 385          * @param string $mime Representing the MIME
 386          * @return mixed True if the file is verified, an array otherwise
 387          */
 388         protected function verifyMimeType( $mime ) {
 389                 global $wgVerifyMimeType;
 390                 wfProfileIn( __METHOD__ );
 391                 if ( $wgVerifyMimeType ) {
 392                         wfDebug( "mime: <$mime> extension: <{$this->mFinalExtension}>\n" );
 393                         global $wgMimeTypeBlacklist;
 394                         if ( $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
 395                                 wfProfileOut( __METHOD__ );
 396
 397                                 return array( 'filetype-badmime', $mime );
 398                         }
 399
 400                         # Check what Internet Explorer would detect
 401                         $fp = fopen( $this->mTempPath, 'rb' );
 402                         $chunk = fread( $fp, 256 );
 403                         fclose( $fp );
 404
 405                         $magic = MimeMagic::singleton();
 406                         $extMime = $magic->guessTypesForExtension( $this->mFinalExtension );
 407                         $ieTypes = $magic->getIEMimeTypes( $this->mTempPath, $chunk, $extMime );
 408                         foreach ( $ieTypes as $ieType ) {
 409                                 if ( $this->checkFileExtension( $ieType, $wgMimeTypeBlacklist ) ) {
 410                                         wfProfileOut( __METHOD__ );
 411
 412                                         return array( 'filetype-bad-ie-mime', $ieType );
 413                                 }
 414                         }
 415                 }
 416
 417                 wfProfileOut( __METHOD__ );
 418
 419                 return true;
 420         }
 421
 422         /**
 423          * Verifies that it's ok to include the uploaded file
 424          *
 425          * @return mixed True of the file is verified, array otherwise.
 426          */
 427         protected function verifyFile() {
 428                 global $wgVerifyMimeType;
 429                 wfProfileIn( __METHOD__ );
 430
 431                 $status = $this->verifyPartialFile();
 432                 if ( $status !== true ) {
 433                         wfProfileOut( __METHOD__ );
 434
 435                         return $status;
 436                 }
 437
 438                 $this->mFileProps = FSFile::getPropsFromPath( $this->mTempPath, $this->mFinalExtension );
 439                 $mime = $this->mFileProps['mime'];
 440
 441                 if ( $wgVerifyMimeType ) {
 442                         # XXX: Missing extension will be caught by validateName() via getTitle()
 443                         if ( $this->mFinalExtension != '' && !$this->verifyExtension( $mime, $this->mFinalExtension ) ) {
 444                                 wfProfileOut( __METHOD__ );
 445
 446                                 return array( 'filetype-mime-mismatch', $this->mFinalExtension, $mime );
 447                         }
 448                 }
 449
 450                 $handler = MediaHandler::getHandler( $mime );
 451                 if ( $handler ) {
 452                         $handlerStatus = $handler->verifyUpload( $this->mTempPath );
 453                         if ( !$handlerStatus->isOK() ) {
 454                                 $errors = $handlerStatus->getErrorsArray();
 455                                 wfProfileOut( __METHOD__ );
 456
 457                                 return reset( $errors );
 458                         }
 459                 }
 460
 461                 wfRunHooks( 'UploadVerifyFile', array( $this, $mime, &$status ) );
 462                 if ( $status !== true ) {
 463                         wfProfileOut( __METHOD__ );
 464
 465                         return $status;
 466                 }
 467
 468                 wfDebug( __METHOD__ . ": all clear; passing.\n" );
 469                 wfProfileOut( __METHOD__ );
 470
 471                 return true;
 472         }
 473
 474         /**
 475          * A verification routine suitable for partial files
 476          *
 477          * Runs the blacklist checks, but not any checks that may
 478          * assume the entire file is present.
 479          *
 480          * @return mixed True for valid or array with error message key.
 481          */
 482         protected function verifyPartialFile() {
 483                 global $wgAllowJavaUploads, $wgDisableUploadScriptChecks;
 484                 wfProfileIn( __METHOD__ );
 485
 486                 # getTitle() sets some internal parameters like $this->mFinalExtension
 487                 $this->getTitle();
 488
 489                 $this->mFileProps = FSFile::getPropsFromPath( $this->mTempPath, $this->mFinalExtension );
 490
 491                 # check MIME type, if desired
 492                 $mime = $this->mFileProps['file-mime'];
 493                 $status = $this->verifyMimeType( $mime );
 494                 if ( $status !== true ) {
 495                         wfProfileOut( __METHOD__ );
 496
 497                         return $status;
 498                 }
 499
 500                 # check for htmlish code and javascript
 501                 if ( !$wgDisableUploadScriptChecks ) {
 502                         if ( self::detectScript( $this->mTempPath, $mime, $this->mFinalExtension ) ) {
 503                                 wfProfileOut( __METHOD__ );
 504
 505                                 return array( 'uploadscripted' );
 506                         }
 507                         if ( $this->mFinalExtension == 'svg' || $mime == 'image/svg+xml' ) {
 508                                 $svgStatus = $this->detectScriptInSvg( $this->mTempPath );
 509                                 if ( $svgStatus !== false ) {
 510                                         wfProfileOut( __METHOD__ );
 511
 512                                         return $svgStatus;
 513                                 }
 514                         }
 515                 }
 516
 517                 # Check for Java applets, which if uploaded can bypass cross-site
 518                 # restrictions.
 519                 if ( !$wgAllowJavaUploads ) {
 520                         $this->mJavaDetected = false;
 521                         $zipStatus = ZipDirectoryReader::read( $this->mTempPath,
 522                                 array( $this, 'zipEntryCallback' ) );
 523                         if ( !$zipStatus->isOK() ) {
 524                                 $errors = $zipStatus->getErrorsArray();
 525                                 $error = reset( $errors );
 526                                 if ( $error[0] !== 'zip-wrong-format' ) {
 527                                         wfProfileOut( __METHOD__ );
 528
 529                                         return $error;
 530                                 }
 531                         }
 532                         if ( $this->mJavaDetected ) {
 533                                 wfProfileOut( __METHOD__ );
 534
 535                                 return array( 'uploadjava' );
 536                         }
 537                 }
 538
 539                 # Scan the uploaded file for viruses
 540                 $virus = $this->detectVirus( $this->mTempPath );
 541                 if ( $virus ) {
 542                         wfProfileOut( __METHOD__ );
 543
 544                         return array( 'uploadvirus', $virus );
 545                 }
 546
 547                 wfProfileOut( __METHOD__ );
 548
 549                 return true;
 550         }
 551
 552         /**
 553          * Callback for ZipDirectoryReader to detect Java class files.
 554          *
 555          * @param array $entry
 556          */
 557         function zipEntryCallback( $entry ) {
 558                 $names = array( $entry['name'] );
 559
 560                 // If there is a null character, cut off the name at it, because JDK's
 561                 // ZIP_GetEntry() uses strcmp() if the name hashes match. If a file name
 562                 // were constructed which had ".class\0" followed by a string chosen to
 563                 // make the hash collide with the truncated name, that file could be
 564                 // returned in response to a request for the .class file.
 565                 $nullPos = strpos( $entry['name'], "\000" );
 566                 if ( $nullPos !== false ) {
 567                         $names[] = substr( $entry['name'], 0, $nullPos );
 568                 }
 569
 570                 // If there is a trailing slash in the file name, we have to strip it,
 571                 // because that's what ZIP_GetEntry() does.
 572                 if ( preg_grep( '!\.class/?$!', $names ) ) {
 573                         $this->mJavaDetected = true;
 574                 }
 575         }
 576
 577         /**
 578          * Alias for verifyTitlePermissions. The function was originally
 579          * 'verifyPermissions', but that suggests it's checking the user, when it's
 580          * really checking the title + user combination.
 581          *
 582          * @param User $user User object to verify the permissions against
 583          * @return mixed An array as returned by getUserPermissionsErrors or true
 584          *   in case the user has proper permissions.
 585          */
 586         public function verifyPermissions( $user ) {
 587                 return $this->verifyTitlePermissions( $user );
 588         }
 589
 590         /**
 591          * Check whether the user can edit, upload and create the image. This
 592          * checks only against the current title; if it returns errors, it may
 593          * very well be that another title will not give errors. Therefore
 594          * isAllowed() should be called as well for generic is-user-blocked or
 595          * can-user-upload checking.
 596          *
 597          * @param User $user User object to verify the permissions against
 598          * @return mixed An array as returned by getUserPermissionsErrors or true
 599          *   in case the user has proper permissions.
 600          */
 601         public function verifyTitlePermissions( $user ) {
 602                 /**
 603                  * If the image is protected, non-sysop users won't be able
 604                  * to modify it by uploading a new revision.
 605                  */
 606                 $nt = $this->getTitle();
 607                 if ( is_null( $nt ) ) {
 608                         return true;
 609                 }
 610                 $permErrors = $nt->getUserPermissionsErrors( 'edit', $user );
 611                 $permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $user );
 612                 if ( !$nt->exists() ) {
 613                         $permErrorsCreate = $nt->getUserPermissionsErrors( 'create', $user );
 614                 } else {
 615                         $permErrorsCreate = array();
 616                 }
 617                 if ( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
 618                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
 619                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );
 620
 621                         return $permErrors;
 622                 }
 623
 624                 $overwriteError = $this->checkOverwrite( $user );
 625                 if ( $overwriteError !== true ) {
 626                         return array( $overwriteError );
 627                 }
 628
 629                 return true;
 630         }
 631
 632         /**
 633          * Check for non fatal problems with the file.
 634          *
 635          * This should not assume that mTempPath is set.
 636          *
 637          * @return array Array of warnings
 638          */
 639         public function checkWarnings() {
 640                 global $wgLang;
 641                 wfProfileIn( __METHOD__ );
 642
 643                 $warnings = array();
 644
 645                 $localFile = $this->getLocalFile();
 646                 $filename = $localFile->getName();
 647
 648                 /**
 649                  * Check whether the resulting filename is different from the desired one,
 650                  * but ignore things like ucfirst() and spaces/underscore things
 651                  */
 652                 $comparableName = str_replace( ' ', '_', $this->mDesiredDestName );
 653                 $comparableName = Title::capitalize( $comparableName, NS_FILE );
 654
 655                 if ( $this->mDesiredDestName != $filename && $comparableName != $filename ) {
 656                         $warnings['badfilename'] = $filename;
 657                         // Debugging for bug 62241
 658                         wfDebugLog( 'upload', "Filename: '$filename', mDesiredDestName: "
 659                                 . "'$this->mDesiredDestName', comparableName: '$comparableName'" );
 660                 }
 661
 662                 // Check whether the file extension is on the unwanted list
 663                 global $wgCheckFileExtensions, $wgFileExtensions;
 664                 if ( $wgCheckFileExtensions ) {
 665                         $extensions = array_unique( $wgFileExtensions );
 666                         if ( !$this->checkFileExtension( $this->mFinalExtension, $extensions ) ) {
 667                                 $warnings['filetype-unwanted-type'] = array( $this->mFinalExtension,
 668                                         $wgLang->commaList( $extensions ), count( $extensions ) );
 669                         }
 670                 }
 671
 672                 global $wgUploadSizeWarning;
 673                 if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) {
 674                         $warnings['large-file'] = array( $wgUploadSizeWarning, $this->mFileSize );
 675                 }
 676
 677                 if ( $this->mFileSize == 0 ) {
 678                         $warnings['emptyfile'] = true;
 679                 }
 680
 681                 $exists = self::getExistsWarning( $localFile );
 682                 if ( $exists !== false ) {
 683                         $warnings['exists'] = $exists;
 684                 }
 685
 686                 // Check dupes against existing files
 687                 $hash = $this->getTempFileSha1Base36();
 688                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 689                 $title = $this->getTitle();
 690                 // Remove all matches against self
 691                 foreach ( $dupes as $key => $dupe ) {
 692                         if ( $title->equals( $dupe->getTitle() ) ) {
 693                                 unset( $dupes[$key] );
 694                         }
 695                 }
 696                 if ( $dupes ) {
 697                         $warnings['duplicate'] = $dupes;
 698                 }
 699
 700                 // Check dupes against archives
 701                 $archivedImage = new ArchivedFile( null, 0, "{$hash}.{$this->mFinalExtension}" );
 702                 if ( $archivedImage->getID() > 0 ) {
 703                         if ( $archivedImage->userCan( File::DELETED_FILE ) ) {
 704                                 $warnings['duplicate-archive'] = $archivedImage->getName();
 705                         } else {
 706                                 $warnings['duplicate-archive'] = '';
 707                         }
 708                 }
 709
 710                 wfProfileOut( __METHOD__ );
 711
 712                 return $warnings;
 713         }
 714
 715         /**
 716          * Really perform the upload. Stores the file in the local repo, watches
 717          * if necessary and runs the UploadComplete hook.
 718          *
 719          * @param string $comment
 720          * @param string $pageText
 721          * @param bool $watch
 722          * @param User $user
 723          *
 724          * @return Status Indicating the whether the upload succeeded.
 725          */
 726         public function performUpload( $comment, $pageText, $watch, $user ) {
 727                 wfProfileIn( __METHOD__ );
 728
 729                 $status = $this->getLocalFile()->upload(
 730                         $this->mTempPath,
 731                         $comment,
 732                         $pageText,
 733                         File::DELETE_SOURCE,
 734                         $this->mFileProps,
 735                         false,
 736                         $user
 737                 );
 738
 739                 if ( $status->isGood() ) {
 740                         if ( $watch ) {
 741                                 WatchAction::doWatch(
 742                                         $this->getLocalFile()->getTitle(),
 743                                         $user,
 744                                         WatchedItem::IGNORE_USER_RIGHTS
 745                                 );
 746                         }
 747                         wfRunHooks( 'UploadComplete', array( &$this ) );
 748                 }
 749
 750                 wfProfileOut( __METHOD__ );
 751
 752                 return $status;
 753         }
 754
 755         /**
 756          * Returns the title of the file to be uploaded. Sets mTitleError in case
 757          * the name was illegal.
 758          *
 759          * @return Title The title of the file or null in case the name was illegal
 760          */
 761         public function getTitle() {
 762                 if ( $this->mTitle !== false ) {
 763                         return $this->mTitle;
 764                 }
 765                 /* Assume that if a user specified File:Something.jpg, this is an error
 766                  * and that the namespace prefix needs to be stripped of.
 767                  */
 768                 $title = Title::newFromText( $this->mDesiredDestName );
 769                 if ( $title && $title->getNamespace() == NS_FILE ) {
 770                         $this->mFilteredName = $title->getDBkey();
 771                 } else {
 772                         $this->mFilteredName = $this->mDesiredDestName;
 773                 }
 774
 775                 # oi_archive_name is max 255 bytes, which include a timestamp and an
 776                 # exclamation mark, so restrict file name to 240 bytes.
 777                 if ( strlen( $this->mFilteredName ) > 240 ) {
 778                         $this->mTitleError = self::FILENAME_TOO_LONG;
 779                         $this->mTitle = null;
 780
 781                         return $this->mTitle;
 782                 }
 783
 784                 /**
 785                  * Chop off any directories in the given filename. Then
 786                  * filter out illegal characters, and try to make a legible name
 787                  * out of it. We'll strip some silently that Title would die on.
 788                  */
 789                 $this->mFilteredName = wfStripIllegalFilenameChars( $this->mFilteredName );
 790                 /* Normalize to title form before we do any further processing */
 791                 $nt = Title::makeTitleSafe( NS_FILE, $this->mFilteredName );
 792                 if ( is_null( $nt ) ) {
 793                         $this->mTitleError = self::ILLEGAL_FILENAME;
 794                         $this->mTitle = null;
 795
 796                         return $this->mTitle;
 797                 }
 798                 $this->mFilteredName = $nt->getDBkey();
 799
 800                 /**
 801                  * We'll want to blacklist against *any* 'extension', and use
 802                  * only the final one for the whitelist.
 803                  */
 804                 list( $partname, $ext ) = $this->splitExtensions( $this->mFilteredName );
 805
 806                 if ( count( $ext ) ) {
 807                         $this->mFinalExtension = trim( $ext[count( $ext ) - 1] );
 808                 } else {
 809                         $this->mFinalExtension = '';
 810
 811                         # No extension, try guessing one
 812                         $magic = MimeMagic::singleton();
 813                         $mime = $magic->guessMimeType( $this->mTempPath );
 814                         if ( $mime !== 'unknown/unknown' ) {
 815                                 # Get a space separated list of extensions
 816                                 $extList = $magic->getExtensionsForType( $mime );
 817                                 if ( $extList ) {
 818                                         # Set the extension to the canonical extension
 819                                         $this->mFinalExtension = strtok( $extList, ' ' );
 820
 821                                         # Fix up the other variables
 822                                         $this->mFilteredName .= ".{$this->mFinalExtension}";
 823                                         $nt = Title::makeTitleSafe( NS_FILE, $this->mFilteredName );
 824                                         $ext = array( $this->mFinalExtension );
 825                                 }
 826                         }
 827                 }
 828
 829                 /* Don't allow users to override the blacklist (check file extension) */
 830                 global $wgCheckFileExtensions, $wgStrictFileExtensions;
 831                 global $wgFileExtensions, $wgFileBlacklist;
 832
 833                 $blackListedExtensions = $this->checkFileExtensionList( $ext, $wgFileBlacklist );
 834
 835                 if ( $this->mFinalExtension == '' ) {
 836                         $this->mTitleError = self::FILETYPE_MISSING;
 837                         $this->mTitle = null;
 838
 839                         return $this->mTitle;
 840                 } elseif ( $blackListedExtensions ||
 841                         ( $wgCheckFileExtensions && $wgStrictFileExtensions &&
 842                                 !$this->checkFileExtension( $this->mFinalExtension, $wgFileExtensions ) )
 843                 ) {
 844                         $this->mBlackListedExtensions = $blackListedExtensions;
 845                         $this->mTitleError = self::FILETYPE_BADTYPE;
 846                         $this->mTitle = null;
 847
 848                         return $this->mTitle;
 849                 }
 850
 851                 // Windows may be broken with special characters, see bug 1780
 852                 if ( !preg_match( '/^[\x0-\x7f]*$/', $nt->getText() )
 853                         && !RepoGroup::singleton()->getLocalRepo()->backendSupportsUnicodePaths()
 854                 ) {
 855                         $this->mTitleError = self::WINDOWS_NONASCII_FILENAME;
 856                         $this->mTitle = null;
 857
 858                         return $this->mTitle;
 859                 }
 860
 861                 # If there was more than one "extension", reassemble the base
 862                 # filename to prevent bogus complaints about length
 863                 if ( count( $ext ) > 1 ) {
 864                         $iterations = count( $ext ) - 1;
 865                         for ( $i = 0; $i < $iterations; $i++ ) {
 866                                 $partname .= '.' . $ext[$i];
 867                         }
 868                 }
 869
 870                 if ( strlen( $partname ) < 1 ) {
 871                         $this->mTitleError = self::MIN_LENGTH_PARTNAME;
 872                         $this->mTitle = null;
 873
 874                         return $this->mTitle;
 875                 }
 876
 877                 $this->mTitle = $nt;
 878
 879                 return $this->mTitle;
 880         }
 881
 882         /**
 883          * Return the local file and initializes if necessary.
 884          *
 885          * @return LocalFile|null
 886          */
 887         public function getLocalFile() {
 888                 if ( is_null( $this->mLocalFile ) ) {
 889                         $nt = $this->getTitle();
 890                         $this->mLocalFile = is_null( $nt ) ? null : wfLocalFile( $nt );
 891                 }
 892
 893                 return $this->mLocalFile;
 894         }
 895
 896         /**
 897          * If the user does not supply all necessary information in the first upload
 898          * form submission (either by accident or by design) then we may want to
 899          * stash the file temporarily, get more information, and publish the file
 900          * later.
 901          *
 902          * This method will stash a file in a temporary directory for later
 903          * processing, and save the necessary descriptive info into the database.
 904          * This method returns the file object, which also has a 'fileKey' property
 905          * which can be passed through a form or API request to find this stashed
 906          * file again.
 907          *
 908          * @param User $user
 909          * @return UploadStashFile Stashed file
 910          */
 911         public function stashFile( User $user = null ) {
 912                 // was stashSessionFile
 913                 wfProfileIn( __METHOD__ );
 914
 915                 $stash = RepoGroup::singleton()->getLocalRepo()->getUploadStash( $user );
 916                 $file = $stash->stashFile( $this->mTempPath, $this->getSourceType() );
 917                 $this->mLocalFile = $file;
 918
 919                 wfProfileOut( __METHOD__ );
 920
 921                 return $file;
 922         }
 923
 924         /**
 925          * Stash a file in a temporary directory, returning a key which can be used
 926          * to find the file again. See stashFile().
 927          *
 928          * @return string File key
 929          */
 930         public function stashFileGetKey() {
 931                 return $this->stashFile()->getFileKey();
 932         }
 933
 934         /**
 935          * alias for stashFileGetKey, for backwards compatibility
 936          *
 937          * @return string File key
 938          */
 939         public function stashSession() {
 940                 return $this->stashFileGetKey();
 941         }
 942
 943         /**
 944          * If we've modified the upload file we need to manually remove it
 945          * on exit to clean up.
 946          */
 947         public function cleanupTempFile() {
 948                 if ( $this->mRemoveTempFile && $this->mTempPath && file_exists( $this->mTempPath ) ) {
 949                         wfDebug( __METHOD__ . ": Removing temporary file {$this->mTempPath}\n" );
 950                         unlink( $this->mTempPath );
 951                 }
 952         }
 953
 954         public function getTempPath() {
 955                 return $this->mTempPath;
 956         }
 957
 958         /**
 959          * Split a file into a base name and all dot-delimited 'extensions'
 960          * on the end. Some web server configurations will fall back to
 961          * earlier pseudo-'extensions' to determine type and execute
 962          * scripts, so the blacklist needs to check them all.
 963          *
 964          * @param string $filename
 965          * @return array
 966          */
 967         public static function splitExtensions( $filename ) {
 968                 $bits = explode( '.', $filename );
 969                 $basename = array_shift( $bits );
 970
 971                 return array( $basename, $bits );
 972         }
 973
 974         /**
 975          * Perform case-insensitive match against a list of file extensions.
 976          * Returns true if the extension is in the list.
 977          *
 978          * @param string $ext
 979          * @param array $list
 980          * @return bool
 981          */
 982         public static function checkFileExtension( $ext, $list ) {
 983                 return in_array( strtolower( $ext ), $list );
 984         }
 985
 986         /**
 987          * Perform case-insensitive match against a list of file extensions.
 988          * Returns an array of matching extensions.
 989          *
 990          * @param array $ext
 991          * @param array $list
 992          * @return bool
 993          */
 994         public static function checkFileExtensionList( $ext, $list ) {
 995                 return array_intersect( array_map( 'strtolower', $ext ), $list );
 996         }
 997
 998         /**
 999          * Checks if the MIME type of the uploaded file matches the file extension.
1000          *
1001          * @param string $mime The MIME type of the uploaded file
1002          * @param string $extension The filename extension that the file is to be served with
1003          * @return bool
1004          */
1005         public static function verifyExtension( $mime, $extension ) {
1006                 $magic = MimeMagic::singleton();
1007
1008                 if ( !$mime || $mime == 'unknown' || $mime == 'unknown/unknown' ) {
1009                         if ( !$magic->isRecognizableExtension( $extension ) ) {
1010                                 wfDebug( __METHOD__ . ": passing file with unknown detected mime type; " .
1011                                         "unrecognized extension '$extension', can't verify\n" );
1012
1013                                 return true;
1014                         } else {
1015                                 wfDebug( __METHOD__ . ": rejecting file with unknown detected mime type; " .
1016                                         "recognized extension '$extension', so probably invalid file\n" );
1017
1018                                 return false;
1019                         }
1020                 }
1021
1022                 $match = $magic->isMatchingExtension( $extension, $mime );
1023
1024                 if ( $match === null ) {
1025                         if ( $magic->getTypesForExtension( $extension ) !== null ) {
1026                                 wfDebug( __METHOD__ . ": No extension known for $mime, but we know a mime for $extension\n" );
1027
1028                                 return false;
1029                         } else {
1030                                 wfDebug( __METHOD__ . ": no file extension known for mime type $mime, passing file\n" );
1031
1032                                 return true;
1033                         }
1034                 } elseif ( $match === true ) {
1035                         wfDebug( __METHOD__ . ": mime type $mime matches extension $extension, passing file\n" );
1036
1037                         /** @todo If it's a bitmap, make sure PHP or ImageMagick resp. can handle it! */
1038                         return true;
1039                 } else {
1040                         wfDebug( __METHOD__
1041                                 . ": mime type $mime mismatches file extension $extension, rejecting file\n" );
1042
1043                         return false;
1044                 }
1045         }
1046
1047         /**
1048          * Heuristic for detecting files that *could* contain JavaScript instructions or
1049          * things that may look like HTML to a browser and are thus
1050          * potentially harmful. The present implementation will produce false
1051          * positives in some situations.
1052          *
1053          * @param string $file Pathname to the temporary upload file
1054          * @param string $mime The MIME type of the file
1055          * @param string $extension The extension of the file
1056          * @return bool True if the file contains something looking like embedded scripts
1057          */
1058         public static function detectScript( $file, $mime, $extension ) {
1059                 global $wgAllowTitlesInSVG;
1060                 wfProfileIn( __METHOD__ );
1061
1062                 # ugly hack: for text files, always look at the entire file.
1063                 # For binary field, just check the first K.
1064
1065                 if ( strpos( $mime, 'text/' ) === 0 ) {
1066                         $chunk = file_get_contents( $file );
1067                 } else {
1068                         $fp = fopen( $file, 'rb' );
1069                         $chunk = fread( $fp, 1024 );
1070                         fclose( $fp );
1071                 }
1072
1073                 $chunk = strtolower( $chunk );
1074
1075                 if ( !$chunk ) {
1076                         wfProfileOut( __METHOD__ );
1077
1078                         return false;
1079                 }
1080
1081                 # decode from UTF-16 if needed (could be used for obfuscation).
1082                 if ( substr( $chunk, 0, 2 ) == "\xfe\xff" ) {
1083                         $enc = 'UTF-16BE';
1084                 } elseif ( substr( $chunk, 0, 2 ) == "\xff\xfe" ) {
1085                         $enc = 'UTF-16LE';
1086                 } else {
1087                         $enc = null;
1088                 }
1089
1090                 if ( $enc ) {
1091                         $chunk = iconv( $enc, "ASCII//IGNORE", $chunk );
1092                 }
1093
1094                 $chunk = trim( $chunk );
1095
1096                 /** @todo FIXME: Convert from UTF-16 if necessary! */
1097                 wfDebug( __METHOD__ . ": checking for embedded scripts and HTML stuff\n" );
1098
1099                 # check for HTML doctype
1100                 if ( preg_match( "/<!DOCTYPE *X?HTML/i", $chunk ) ) {
1101                         wfProfileOut( __METHOD__ );
1102
1103                         return true;
1104                 }
1105
1106                 // Some browsers will interpret obscure xml encodings as UTF-8, while
1107                 // PHP/expat will interpret the given encoding in the xml declaration (bug 47304)
1108                 if ( $extension == 'svg' || strpos( $mime, 'image/svg' ) === 0 ) {
1109                         if ( self::checkXMLEncodingMissmatch( $file ) ) {
1110                                 wfProfileOut( __METHOD__ );
1111
1112                                 return true;
1113                         }
1114                 }
1115
1116                 /**
1117                  * Internet Explorer for Windows performs some really stupid file type
1118                  * autodetection which can cause it to interpret valid image files as HTML
1119                  * and potentially execute JavaScript, creating a cross-site scripting
1120                  * attack vectors.
1121                  *
1122                  * Apple's Safari browser also performs some unsafe file type autodetection
1123                  * which can cause legitimate files to be interpreted as HTML if the
1124                  * web server is not correctly configured to send the right content-type
1125                  * (or if you're really uploading plain text and octet streams!)
1126                  *
1127                  * Returns true if IE is likely to mistake the given file for HTML.
1128                  * Also returns true if Safari would mistake the given file for HTML
1129                  * when served with a generic content-type.
1130                  */
1131                 $tags = array(
1132                         '<a href',
1133                         '<body',
1134                         '<head',
1135                         '<html', #also in safari
1136                         '<img',
1137                         '<pre',
1138                         '<script', #also in safari
1139                         '<table'
1140                 );
1141
1142                 if ( !$wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
1143                         $tags[] = '<title';
1144                 }
1145
1146                 foreach ( $tags as $tag ) {
1147                         if ( false !== strpos( $chunk, $tag ) ) {
1148                                 wfDebug( __METHOD__ . ": found something that may make it be mistaken for html: $tag\n" );
1149                                 wfProfileOut( __METHOD__ );
1150
1151                                 return true;
1152                         }
1153                 }
1154
1155                 /*
1156                  * look for JavaScript
1157                  */
1158
1159                 # resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1160                 $chunk = Sanitizer::decodeCharReferences( $chunk );
1161
1162                 # look for script-types
1163                 if ( preg_match( '!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim', $chunk ) ) {
1164                         wfDebug( __METHOD__ . ": found script types\n" );
1165                         wfProfileOut( __METHOD__ );
1166
1167                         return true;
1168                 }
1169
1170                 # look for html-style script-urls
1171                 if ( preg_match( '!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim', $chunk ) ) {
1172                         wfDebug( __METHOD__ . ": found html-style script urls\n" );
1173                         wfProfileOut( __METHOD__ );
1174
1175                         return true;
1176                 }
1177
1178                 # look for css-style script-urls
1179                 if ( preg_match( '!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim', $chunk ) ) {
1180                         wfDebug( __METHOD__ . ": found css-style script urls\n" );
1181                         wfProfileOut( __METHOD__ );
1182
1183                         return true;
1184                 }
1185
1186                 wfDebug( __METHOD__ . ": no scripts found\n" );
1187                 wfProfileOut( __METHOD__ );
1188
1189                 return false;
1190         }
1191
1192         /**
1193          * Check a whitelist of xml encodings that are known not to be interpreted differently
1194          * by the server's xml parser (expat) and some common browsers.
1195          *
1196          * @param string $file Pathname to the temporary upload file
1197          * @return bool True if the file contains an encoding that could be misinterpreted
1198          */
1199         public static function checkXMLEncodingMissmatch( $file ) {
1200                 global $wgSVGMetadataCutoff;
1201                 $contents = file_get_contents( $file, false, null, -1, $wgSVGMetadataCutoff );
1202                 $encodingRegex = '!encoding[ \t\n\r]*=[ \t\n\r]*[\'"](.*?)[\'"]!si';
1203
1204                 if ( preg_match( "!<\?xml\b(.*?)\?>!si", $contents, $matches ) ) {
1205                         if ( preg_match( $encodingRegex, $matches[1], $encMatch )
1206                                 && !in_array( strtoupper( $encMatch[1] ), self::$safeXmlEncodings )
1207                         ) {
1208                                 wfDebug( __METHOD__ . ": Found unsafe XML encoding '{$encMatch[1]}'\n" );
1209
1210                                 return true;
1211                         }
1212                 } elseif ( preg_match( "!<\?xml\b!si", $contents ) ) {
1213                         // Start of XML declaration without an end in the first $wgSVGMetadataCutoff
1214                         // bytes. There shouldn't be a legitimate reason for this to happen.
1215                         wfDebug( __METHOD__ . ": Unmatched XML declaration start\n" );
1216
1217                         return true;
1218                 } elseif ( substr( $contents, 0, 4 ) == "\x4C\x6F\xA7\x94" ) {
1219                         // EBCDIC encoded XML
1220                         wfDebug( __METHOD__ . ": EBCDIC Encoded XML\n" );
1221
1222                         return true;
1223                 }
1224
1225                 // It's possible the file is encoded with multi-byte encoding, so re-encode attempt to
1226                 // detect the encoding in case is specifies an encoding not whitelisted in self::$safeXmlEncodings
1227                 $attemptEncodings = array( 'UTF-16', 'UTF-16BE', 'UTF-32', 'UTF-32BE' );
1228                 foreach ( $attemptEncodings as $encoding ) {
1229                         wfSuppressWarnings();
1230                         $str = iconv( $encoding, 'UTF-8', $contents );
1231                         wfRestoreWarnings();
1232                         if ( $str != '' && preg_match( "!<\?xml\b(.*?)\?>!si", $str, $matches ) ) {
1233                                 if ( preg_match( $encodingRegex, $matches[1], $encMatch )
1234                                         && !in_array( strtoupper( $encMatch[1] ), self::$safeXmlEncodings )
1235                                 ) {
1236                                         wfDebug( __METHOD__ . ": Found unsafe XML encoding '{$encMatch[1]}'\n" );
1237
1238                                         return true;
1239                                 }
1240                         } elseif ( $str != '' && preg_match( "!<\?xml\b!si", $str ) ) {
1241                                 // Start of XML declaration without an end in the first $wgSVGMetadataCutoff
1242                                 // bytes. There shouldn't be a legitimate reason for this to happen.
1243                                 wfDebug( __METHOD__ . ": Unmatched XML declaration start\n" );
1244
1245                                 return true;
1246                         }
1247                 }
1248
1249                 return false;
1250         }
1251
1252         /**
1253          * @param string $filename
1254          * @return mixed False of the file is verified (does not contain scripts), array otherwise.
1255          */
1256         protected function detectScriptInSvg( $filename ) {
1257                 $this->mSVGNSError = false;
1258                 $check = new XmlTypeCheck(
1259                         $filename,
1260                         array( $this, 'checkSvgScriptCallback' ),
1261                         true,
1262                         array( 'processing_instruction_handler' => 'UploadBase::checkSvgPICallback' )
1263                 );
1264                 if ( $check->wellFormed !== true ) {
1265                         // Invalid xml (bug 58553)
1266                         return array( 'uploadinvalidxml' );
1267                 } elseif ( $check->filterMatch ) {
1268                         if ( $this->mSVGNSError ) {
1269                                 return array( 'uploadscriptednamespace', $this->mSVGNSError );
1270                         }
1271
1272                         return array( 'uploadscripted' );
1273                 }
1274
1275                 return false;
1276         }
1277
1278         /**
1279          * Callback to filter SVG Processing Instructions.
1280          * @param string $target Processing instruction name
1281          * @param string $data Processing instruction attribute and value
1282          * @return bool (true if the filter identified something bad)
1283          */
1284         public static function checkSvgPICallback( $target, $data ) {
1285                 // Don't allow external stylesheets (bug 57550)
1286                 if ( preg_match( '/xml-stylesheet/i', $target ) ) {
1287                         return true;
1288                 }
1289
1290                 return false;
1291         }
1292
1293         /**
1294          * @todo Replace this with a whitelist filter!
1295          * @param string $element
1296          * @param array $attribs
1297          * @return bool
1298          */
1299         public function checkSvgScriptCallback( $element, $attribs ) {
1300                 list( $namespace, $strippedElement ) = $this->splitXmlNamespace( $element );
1301
1302                 // We specifically don't include:
1303                 // http://www.w3.org/1999/xhtml (bug 60771)
1304                 static $validNamespaces = array(
1305                         '',
1306                         'adobe:ns:meta/',
1307                         'http://creativecommons.org/ns#',
1308                         'http://inkscape.sourceforge.net/dtd/sodipodi-0.dtd',
1309                         'http://ns.adobe.com/adobeillustrator/10.0/',
1310                         'http://ns.adobe.com/adobesvgviewerextensions/3.0/',
1311                         'http://ns.adobe.com/extensibility/1.0/',
1312                         'http://ns.adobe.com/flows/1.0/',
1313                         'http://ns.adobe.com/illustrator/1.0/',
1314                         'http://ns.adobe.com/imagereplacement/1.0/',
1315                         'http://ns.adobe.com/pdf/1.3/',
1316                         'http://ns.adobe.com/photoshop/1.0/',
1317                         'http://ns.adobe.com/saveforweb/1.0/',
1318                         'http://ns.adobe.com/variables/1.0/',
1319                         'http://ns.adobe.com/xap/1.0/',
1320                         'http://ns.adobe.com/xap/1.0/g/',
1321                         'http://ns.adobe.com/xap/1.0/g/img/',
1322                         'http://ns.adobe.com/xap/1.0/mm/',
1323                         'http://ns.adobe.com/xap/1.0/rights/',
1324                         'http://ns.adobe.com/xap/1.0/stype/dimensions#',
1325                         'http://ns.adobe.com/xap/1.0/stype/font#',
1326                         'http://ns.adobe.com/xap/1.0/stype/manifestitem#',
1327                         'http://ns.adobe.com/xap/1.0/stype/resourceevent#',
1328                         'http://ns.adobe.com/xap/1.0/stype/resourceref#',
1329                         'http://ns.adobe.com/xap/1.0/t/pg/',
1330                         'http://purl.org/dc/elements/1.1/',
1331                         'http://purl.org/dc/elements/1.1',
1332                         'http://schemas.microsoft.com/visio/2003/svgextensions/',
1333                         'http://sodipodi.sourceforge.net/dtd/sodipodi-0.dtd',
1334                         'http://taptrix.com/inkpad/svg_extensions',
1335                         'http://web.resource.org/cc/',
1336                         'http://www.freesoftware.fsf.org/bkchem/cdml',
1337                         'http://www.inkscape.org/namespaces/inkscape',
1338                         'http://www.opengis.net/gml',
1339                         'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
1340                         'http://www.w3.org/2000/svg',
1341                         'http://www.w3.org/tr/rec-rdf-syntax/',
1342                 );
1343
1344                 if ( !in_array( $namespace, $validNamespaces ) ) {
1345                         wfDebug( __METHOD__ . ": Non-svg namespace '$namespace' in uploaded file.\n" );
1346                         /** @todo Return a status object to a closure in XmlTypeCheck, for MW1.21+ */
1347                         $this->mSVGNSError = $namespace;
1348
1349                         return true;
1350                 }
1351
1352                 /*
1353                  * check for elements that can contain javascript
1354                  */
1355                 if ( $strippedElement == 'script' ) {
1356                         wfDebug( __METHOD__ . ": Found script element '$element' in uploaded file.\n" );
1357
1358                         return true;
1359                 }
1360
1361                 # e.g., <svg xmlns="http://www.w3.org/2000/svg">
1362                 #  <handler xmlns:ev="http://www.w3.org/2001/xml-events" ev:event="load">alert(1)</handler> </svg>
1363                 if ( $strippedElement == 'handler' ) {
1364                         wfDebug( __METHOD__ . ": Found scriptable element '$element' in uploaded file.\n" );
1365
1366                         return true;
1367                 }
1368
1369                 # SVG reported in Feb '12 that used xml:stylesheet to generate javascript block
1370                 if ( $strippedElement == 'stylesheet' ) {
1371                         wfDebug( __METHOD__ . ": Found scriptable element '$element' in uploaded file.\n" );
1372
1373                         return true;
1374                 }
1375
1376                 # Block iframes, in case they pass the namespace check
1377                 if ( $strippedElement == 'iframe' ) {
1378                         wfDebug( __METHOD__ . ": iframe in uploaded file.\n" );
1379
1380                         return true;
1381                 }
1382
1383                 foreach ( $attribs as $attrib => $value ) {
1384                         $stripped = $this->stripXmlNamespace( $attrib );
1385                         $value = strtolower( $value );
1386
1387                         if ( substr( $stripped, 0, 2 ) == 'on' ) {
1388                                 wfDebug( __METHOD__
1389                                         . ": Found event-handler attribute '$attrib'='$value' in uploaded file.\n" );
1390
1391                                 return true;
1392                         }
1393
1394                         # href with non-local target (don't allow http://, javascript:, etc)
1395                         if ( $stripped == 'href'
1396                                 && strpos( $value, 'data:' ) !== 0
1397                                 && strpos( $value, '#' ) !== 0
1398                         ) {
1399                                 if ( !( $strippedElement === 'a'
1400                                         && preg_match( '!^https?://!im', $value ) )
1401                                 ) {
1402                                         wfDebug( __METHOD__ . ": Found href attribute <$strippedElement "
1403                                                 . "'$attrib'='$value' in uploaded file.\n" );
1404
1405                                         return true;
1406                                 }
1407                         }
1408
1409                         # href with embedded svg as target
1410                         if ( $stripped == 'href' && preg_match( '!data:[^,]*image/svg[^,]*,!sim', $value ) ) {
1411                                 wfDebug( __METHOD__ . ": Found href to embedded svg "
1412                                         . "\"<$strippedElement '$attrib'='$value'...\" in uploaded file.\n" );
1413
1414                                 return true;
1415                         }
1416
1417                         # href with embedded (text/xml) svg as target
1418                         if ( $stripped == 'href' && preg_match( '!data:[^,]*text/xml[^,]*,!sim', $value ) ) {
1419                                 wfDebug( __METHOD__ . ": Found href to embedded svg "
1420                                         . "\"<$strippedElement '$attrib'='$value'...\" in uploaded file.\n" );
1421
1422                                 return true;
1423                         }
1424
1425                         # use set/animate to add event-handler attribute to parent
1426                         if ( ( $strippedElement == 'set' || $strippedElement == 'animate' )
1427                                 && $stripped == 'attributename'
1428                                 && substr( $value, 0, 2 ) == 'on'
1429                         ) {
1430                                 wfDebug( __METHOD__ . ": Found svg setting event-handler attribute with "
1431                                         . "\"<$strippedElement $stripped='$value'...\" in uploaded file.\n" );
1432
1433                                 return true;
1434                         }
1435
1436                         # use set to add href attribute to parent element
1437                         if ( $strippedElement == 'set'
1438                                 && $stripped == 'attributename'
1439                                 && strpos( $value, 'href' ) !== false
1440                         ) {
1441                                 wfDebug( __METHOD__ . ": Found svg setting href attribute '$value' in uploaded file.\n" );
1442
1443                                 return true;
1444                         }
1445
1446                         # use set to add a remote / data / script target to an element
1447                         if ( $strippedElement == 'set'
1448                                 && $stripped == 'to'
1449                                 && preg_match( '!(http|https|data|script):!sim', $value )
1450                         ) {
1451                                 wfDebug( __METHOD__ . ": Found svg setting attribute to '$value' in uploaded file.\n" );
1452
1453                                 return true;
1454                         }
1455
1456                         # use handler attribute with remote / data / script
1457                         if ( $stripped == 'handler' && preg_match( '!(http|https|data|script):!sim', $value ) ) {
1458                                 wfDebug( __METHOD__ . ": Found svg setting handler with remote/data/script "
1459                                         . "'$attrib'='$value' in uploaded file.\n" );
1460
1461                                 return true;
1462                         }
1463
1464                         # use CSS styles to bring in remote code
1465                         # catch url("http:..., url('http:..., url(http:..., but not url("#..., url('#..., url(#....
1466                         $tagsList = "font|clip-path|fill|filter|marker|marker-end|marker-mid|marker-start|mask|stroke";
1467                         if ( $stripped == 'style'
1468                                 && preg_match_all(
1469                                         '!((?:' . $tagsList . ')\s*:\s*url\s*\(\s*["\']?\s*[^#]+.*?\))!sim',
1470                                         $value,
1471                                         $matches
1472                                 )
1473                         ) {
1474                                 foreach ( $matches[1] as $match ) {
1475                                         if ( !preg_match( '!(?:' . $tagsList . ')\s*:\s*url\s*\(\s*(#|\'#|"#)!sim', $match ) ) {
1476                                                 wfDebug( __METHOD__ . ": Found svg setting a style with "
1477                                                         . "remote url '$attrib'='$value' in uploaded file.\n" );
1478
1479                                                 return true;
1480                                         }
1481                                 }
1482                         }
1483
1484                         # image filters can pull in url, which could be svg that executes scripts
1485                         if ( $strippedElement == 'image'
1486                                 && $stripped == 'filter'
1487                                 && preg_match( '!url\s*\(!sim', $value )
1488                         ) {
1489                                 wfDebug( __METHOD__ . ": Found image filter with url: "
1490                                         . "\"<$strippedElement $stripped='$value'...\" in uploaded file.\n" );
1491
1492                                 return true;
1493                         }
1494                 }
1495
1496                 return false; //No scripts detected
1497         }
1498
1499         /**
1500          * Divide the element name passed by the xml parser to the callback into URI and prifix.
1501          * @param string $name
1502          * @return array Containing the namespace URI and prefix
1503          */
1504         private static function splitXmlNamespace( $element ) {
1505                 // 'http://www.w3.org/2000/svg:script' -> array( 'http://www.w3.org/2000/svg', 'script' )
1506                 $parts = explode( ':', strtolower( $element ) );
1507                 $name = array_pop( $parts );
1508                 $ns = implode( ':', $parts );
1509
1510                 return array( $ns, $name );
1511         }
1512
1513         /**
1514          * @param string $name
1515          * @return string
1516          */
1517         private function stripXmlNamespace( $name ) {
1518                 // 'http://www.w3.org/2000/svg:script' -> 'script'
1519                 $parts = explode( ':', strtolower( $name ) );
1520
1521                 return array_pop( $parts );
1522         }
1523
1524         /**
1525          * Generic wrapper function for a virus scanner program.
1526          * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
1527          * $wgAntivirusRequired may be used to deny upload if the scan fails.
1528          *
1529          * @param string $file Pathname to the temporary upload file
1530          * @return mixed False if not virus is found, null if the scan fails or is disabled,
1531          *   or a string containing feedback from the virus scanner if a virus was found.
1532          *   If textual feedback is missing but a virus was found, this function returns true.
1533          */
1534         public static function detectVirus( $file ) {
1535                 global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
1536                 wfProfileIn( __METHOD__ );
1537
1538                 if ( !$wgAntivirus ) {
1539                         wfDebug( __METHOD__ . ": virus scanner disabled\n" );
1540                         wfProfileOut( __METHOD__ );
1541
1542                         return null;
1543                 }
1544
1545                 if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1546                         wfDebug( __METHOD__ . ": unknown virus scanner: $wgAntivirus\n" );
1547                         $wgOut->wrapWikiMsg( "<div class=\"error\">\n$1\n</div>",
1548                                 array( 'virus-badscanner', $wgAntivirus ) );
1549                         wfProfileOut( __METHOD__ );
1550
1551                         return wfMessage( 'virus-unknownscanner' )->text() . " $wgAntivirus";
1552                 }
1553
1554                 # look up scanner configuration
1555                 $command = $wgAntivirusSetup[$wgAntivirus]['command'];
1556                 $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]['codemap'];
1557                 $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]['messagepattern'] ) ?
1558                         $wgAntivirusSetup[$wgAntivirus]['messagepattern'] : null;
1559
1560                 if ( strpos( $command, "%f" ) === false ) {
1561                         # simple pattern: append file to scan
1562                         $command .= " " . wfEscapeShellArg( $file );
1563                 } else {
1564                         # complex pattern: replace "%f" with file to scan
1565                         $command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
1566                 }
1567
1568                 wfDebug( __METHOD__ . ": running virus scan: $command \n" );
1569
1570                 # execute virus scanner
1571                 $exitCode = false;
1572
1573                 # NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1574                 #      that does not seem to be worth the pain.
1575                 #      Ask me (Duesentrieb) about it if it's ever needed.
1576                 $output = wfShellExecWithStderr( $command, $exitCode );
1577
1578                 # map exit code to AV_xxx constants.
1579                 $mappedCode = $exitCode;
1580                 if ( $exitCodeMap ) {
1581                         if ( isset( $exitCodeMap[$exitCode] ) ) {
1582                                 $mappedCode = $exitCodeMap[$exitCode];
1583                         } elseif ( isset( $exitCodeMap["*"] ) ) {
1584                                 $mappedCode = $exitCodeMap["*"];
1585                         }
1586                 }
1587
1588                 /* NB: AV_NO_VIRUS is 0 but AV_SCAN_FAILED is false,
1589                  * so we need the strict equalities === and thus can't use a switch here
1590                  */
1591                 if ( $mappedCode === AV_SCAN_FAILED ) {
1592                         # scan failed (code was mapped to false by $exitCodeMap)
1593                         wfDebug( __METHOD__ . ": failed to scan $file (code $exitCode).\n" );
1594
1595                         $output = $wgAntivirusRequired
1596                                 ? wfMessage( 'virus-scanfailed', array( $exitCode ) )->text()
1597                                 : null;
1598                 } elseif ( $mappedCode === AV_SCAN_ABORTED ) {
1599                         # scan failed because filetype is unknown (probably imune)
1600                         wfDebug( __METHOD__ . ": unsupported file type $file (code $exitCode).\n" );
1601                         $output = null;
1602                 } elseif ( $mappedCode === AV_NO_VIRUS ) {
1603                         # no virus found
1604                         wfDebug( __METHOD__ . ": file passed virus scan.\n" );
1605                         $output = false;
1606                 } else {
1607                         $output = trim( $output );
1608
1609                         if ( !$output ) {
1610                                 $output = true; #if there's no output, return true
1611                         } elseif ( $msgPattern ) {
1612                                 $groups = array();
1613                                 if ( preg_match( $msgPattern, $output, $groups ) ) {
1614                                         if ( $groups[1] ) {
1615                                                 $output = $groups[1];
1616                                         }
1617                                 }
1618                         }
1619
1620                         wfDebug( __METHOD__ . ": FOUND VIRUS! scanner feedback: $output \n" );
1621                 }
1622
1623                 wfProfileOut( __METHOD__ );
1624
1625                 return $output;
1626         }
1627
1628         /**
1629          * Check if there's an overwrite conflict and, if so, if restrictions
1630          * forbid this user from performing the upload.
1631          *
1632          * @param User $user
1633          *
1634          * @return mixed True on success, array on failure
1635          */
1636         private function checkOverwrite( $user ) {
1637                 // First check whether the local file can be overwritten
1638                 $file = $this->getLocalFile();
1639                 if ( $file->exists() ) {
1640                         if ( !self::userCanReUpload( $user, $file ) ) {
1641                                 return array( 'fileexists-forbidden', $file->getName() );
1642                         } else {
1643                                 return true;
1644                         }
1645                 }
1646
1647                 /* Check shared conflicts: if the local file does not exist, but
1648                  * wfFindFile finds a file, it exists in a shared repository.
1649                  */
1650                 $file = wfFindFile( $this->getTitle() );
1651                 if ( $file && !$user->isAllowed( 'reupload-shared' ) ) {
1652                         return array( 'fileexists-shared-forbidden', $file->getName() );
1653                 }
1654
1655                 return true;
1656         }
1657
1658         /**
1659          * Check if a user is the last uploader
1660          *
1661          * @param User $user
1662          * @param string $img Image name
1663          * @return bool
1664          */
1665         public static function userCanReUpload( User $user, $img ) {
1666                 if ( $user->isAllowed( 'reupload' ) ) {
1667                         return true; // non-conditional
1668                 }
1669                 if ( !$user->isAllowed( 'reupload-own' ) ) {
1670                         return false;
1671                 }
1672                 if ( is_string( $img ) ) {
1673                         $img = wfLocalFile( $img );
1674                 }
1675                 if ( !( $img instanceof LocalFile ) ) {
1676                         return false;
1677                 }
1678
1679                 return $user->getId() == $img->getUser( 'id' );
1680         }
1681
1682         /**
1683          * Helper function that does various existence checks for a file.
1684          * The following checks are performed:
1685          * - The file exists
1686          * - Article with the same name as the file exists
1687          * - File exists with normalized extension
1688          * - The file looks like a thumbnail and the original exists
1689          *
1690          * @param File $file The File object to check
1691          * @return mixed False if the file does not exists, else an array
1692          */
1693         public static function getExistsWarning( $file ) {
1694                 if ( $file->exists() ) {
1695                         return array( 'warning' => 'exists', 'file' => $file );
1696                 }
1697
1698                 if ( $file->getTitle()->getArticleID() ) {
1699                         return array( 'warning' => 'page-exists', 'file' => $file );
1700                 }
1701
1702                 if ( $file->wasDeleted() && !$file->exists() ) {
1703                         return array( 'warning' => 'was-deleted', 'file' => $file );
1704                 }
1705
1706                 if ( strpos( $file->getName(), '.' ) == false ) {
1707                         $partname = $file->getName();
1708                         $extension = '';
1709                 } else {
1710                         $n = strrpos( $file->getName(), '.' );
1711                         $extension = substr( $file->getName(), $n + 1 );
1712                         $partname = substr( $file->getName(), 0, $n );
1713                 }
1714                 $normalizedExtension = File::normalizeExtension( $extension );
1715
1716                 if ( $normalizedExtension != $extension ) {
1717                         // We're not using the normalized form of the extension.
1718                         // Normal form is lowercase, using most common of alternate
1719                         // extensions (eg 'jpg' rather than 'JPEG').
1720                         //
1721                         // Check for another file using the normalized form...
1722                         $nt_lc = Title::makeTitle( NS_FILE, "{$partname}.{$normalizedExtension}" );
1723                         $file_lc = wfLocalFile( $nt_lc );
1724
1725                         if ( $file_lc->exists() ) {
1726                                 return array(
1727                                         'warning' => 'exists-normalized',
1728                                         'file' => $file,
1729                                         'normalizedFile' => $file_lc
1730                                 );
1731                         }
1732                 }
1733
1734                 // Check for files with the same name but a different extension
1735                 $similarFiles = RepoGroup::singleton()->getLocalRepo()->findFilesByPrefix(
1736                         "{$partname}.", 1 );
1737                 if ( count( $similarFiles ) ) {
1738                         return array(
1739                                 'warning' => 'exists-normalized',
1740                                 'file' => $file,
1741                                 'normalizedFile' => $similarFiles[0],
1742                         );
1743                 }
1744
1745                 if ( self::isThumbName( $file->getName() ) ) {
1746                         # Check for filenames like 50px- or 180px-, these are mostly thumbnails
1747                         $nt_thb = Title::newFromText(
1748                                 substr( $partname, strpos( $partname, '-' ) + 1 ) . '.' . $extension,
1749                                 NS_FILE
1750                         );
1751                         $file_thb = wfLocalFile( $nt_thb );
1752                         if ( $file_thb->exists() ) {
1753                                 return array(
1754                                         'warning' => 'thumb',
1755                                         'file' => $file,
1756                                         'thumbFile' => $file_thb
1757                                 );
1758                         } else {
1759                                 // File does not exist, but we just don't like the name
1760                                 return array(
1761                                         'warning' => 'thumb-name',
1762                                         'file' => $file,
1763                                         'thumbFile' => $file_thb
1764                                 );
1765                         }
1766                 }
1767
1768                 foreach ( self::getFilenamePrefixBlacklist() as $prefix ) {
1769                         if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
1770                                 return array(
1771                                         'warning' => 'bad-prefix',
1772                                         'file' => $file,
1773                                         'prefix' => $prefix
1774                                 );
1775                         }
1776                 }
1777
1778                 return false;
1779         }
1780
1781         /**
1782          * Helper function that checks whether the filename looks like a thumbnail
1783          * @param string $filename
1784          * @return bool
1785          */
1786         public static function isThumbName( $filename ) {
1787                 $n = strrpos( $filename, '.' );
1788                 $partname = $n ? substr( $filename, 0, $n ) : $filename;
1789
1790                 return (
1791                         substr( $partname, 3, 3 ) == 'px-' ||
1792                         substr( $partname, 2, 3 ) == 'px-'
1793                 ) &&
1794                 preg_match( "/[0-9]{2}/", substr( $partname, 0, 2 ) );
1795         }
1796
1797         /**
1798          * Get a list of blacklisted filename prefixes from [[MediaWiki:Filename-prefix-blacklist]]
1799          *
1800          * @return array List of prefixes
1801          */
1802         public static function getFilenamePrefixBlacklist() {
1803                 $blacklist = array();
1804                 $message = wfMessage( 'filename-prefix-blacklist' )->inContentLanguage();
1805                 if ( !$message->isDisabled() ) {
1806                         $lines = explode( "\n", $message->plain() );
1807                         foreach ( $lines as $line ) {
1808                                 // Remove comment lines
1809                                 $comment = substr( trim( $line ), 0, 1 );
1810                                 if ( $comment == '#' || $comment == '' ) {
1811                                         continue;
1812                                 }
1813                                 // Remove additional comments after a prefix
1814                                 $comment = strpos( $line, '#' );
1815                                 if ( $comment > 0 ) {
1816                                         $line = substr( $line, 0, $comment - 1 );
1817                                 }
1818                                 $blacklist[] = trim( $line );
1819                         }
1820                 }
1821
1822                 return $blacklist;
1823         }
1824
1825         /**
1826          * Gets image info about the file just uploaded.
1827          *
1828          * Also has the effect of setting metadata to be an 'indexed tag name' in
1829          * returned API result if 'metadata' was requested. Oddly, we have to pass
1830          * the "result" object down just so it can do that with the appropriate
1831          * format, presumably.
1832          *
1833          * @param ApiResult $result
1834          * @return array Image info
1835          */
1836         public function getImageInfo( $result ) {
1837                 $file = $this->getLocalFile();
1838                 /** @todo This cries out for refactoring.
1839                  *  We really want to say $file->getAllInfo(); here.
1840                  * Perhaps "info" methods should be moved into files, and the API should
1841                  * just wrap them in queries.
1842                  */
1843                 if ( $file instanceof UploadStashFile ) {
1844                         $imParam = ApiQueryStashImageInfo::getPropertyNames();
1845                         $info = ApiQueryStashImageInfo::getInfo( $file, array_flip( $imParam ), $result );
1846                 } else {
1847                         $imParam = ApiQueryImageInfo::getPropertyNames();
1848                         $info = ApiQueryImageInfo::getInfo( $file, array_flip( $imParam ), $result );
1849                 }
1850
1851                 return $info;
1852         }
1853
1854         /**
1855          * @param array $error
1856          * @return Status
1857          */
1858         public function convertVerifyErrorToStatus( $error ) {
1859                 $code = $error['status'];
1860                 unset( $code['status'] );
1861
1862                 return Status::newFatal( $this->getVerificationErrorCode( $code ), $error );
1863         }
1864
1865         /**
1866          * @param null|string $forType
1867          * @return int
1868          */
1869         public static function getMaxUploadSize( $forType = null ) {
1870                 global $wgMaxUploadSize;
1871
1872                 if ( is_array( $wgMaxUploadSize ) ) {
1873                         if ( !is_null( $forType ) && isset( $wgMaxUploadSize[$forType] ) ) {
1874                                 return $wgMaxUploadSize[$forType];
1875                         } else {
1876                                 return $wgMaxUploadSize['*'];
1877                         }
1878                 } else {
1879                         return intval( $wgMaxUploadSize );
1880                 }
1881         }
1882
1883         /**
1884          * Get the current status of a chunked upload (used for polling).
1885          * The status will be read from the *current* user session.
1886          * @param string $statusKey
1887          * @return array|bool
1888          */
1889         public static function getSessionStatus( $statusKey ) {
1890                 return isset( $_SESSION[self::SESSION_STATUS_KEY][$statusKey] )
1891                         ? $_SESSION[self::SESSION_STATUS_KEY][$statusKey]
1892                         : false;
1893         }
1894
1895         /**
1896          * Set the current status of a chunked upload (used for polling).
1897          * The status will be stored in the *current* user session.
1898          * @param string $statusKey
1899          * @param array|bool $value
1900          * @return void
1901          */
1902         public static function setSessionStatus( $statusKey, $value ) {
1903                 if ( $value === false ) {
1904                         unset( $_SESSION[self::SESSION_STATUS_KEY][$statusKey] );
1905                 } else {
1906                         $_SESSION[self::SESSION_STATUS_KEY][$statusKey] = $value;
1907                 }
1908         }
1909 }