includes/specials/SpecialUpload.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup SpecialPage
   5  */
   6
   7
   8 /**
   9  * Entry point
  10  */
  11 function wfSpecialUpload() {
  12         global $wgRequest;
  13         $form = new UploadForm( $wgRequest );
  14         $form->execute();
  15 }
  16
  17 /**
  18  * implements Special:Upload
  19  * @ingroup SpecialPage
  20  */
  21 class UploadForm {
  22         const SUCCESS = 0;
  23         const BEFORE_PROCESSING = 1;
  24         const LARGE_FILE_SERVER = 2;
  25         const EMPTY_FILE = 3;
  26         const MIN_LENGTH_PARTNAME = 4;
  27         const ILLEGAL_FILENAME = 5;
  28         const PROTECTED_PAGE = 6;
  29         const OVERWRITE_EXISTING_FILE = 7;
  30         const FILETYPE_MISSING = 8;
  31         const FILETYPE_BADTYPE = 9;
  32         const VERIFICATION_ERROR = 10;
  33         const UPLOAD_VERIFICATION_ERROR = 11;
  34         const UPLOAD_WARNING = 12;
  35         const INTERNAL_ERROR = 13;
  36
  37         /**#@+
  38          * @access private
  39          */
  40         var $mComment, $mLicense, $mIgnoreWarning, $mCurlError;
  41         var $mDestName, $mTempPath, $mFileSize, $mFileProps;
  42         var $mCopyrightStatus, $mCopyrightSource, $mReUpload, $mAction, $mUploadClicked;
  43         var $mSrcName, $mSessionKey, $mStashed, $mDesiredDestName, $mRemoveTempFile, $mSourceType;
  44         var $mDestWarningAck, $mCurlDestHandle;
  45         var $mLocalFile;
  46
  47         # Placeholders for text injection by hooks (must be HTML)
  48         # extensions should take care to _append_ to the present value
  49         var $uploadFormTextTop;
  50         var $uploadFormTextAfterSummary;
  51
  52         const SESSION_VERSION = 1;
  53         /**#@-*/
  54
  55         /**
  56          * Constructor : initialise object
  57          * Get data POSTed through the form and assign them to the object
  58          * @param $request Data posted.
  59          */
  60         function UploadForm( &$request ) {
  61                 global $wgAllowCopyUploads;
  62                 $this->mDesiredDestName   = $request->getText( 'wpDestFile' );
  63                 $this->mIgnoreWarning     = $request->getCheck( 'wpIgnoreWarning' );
  64                 $this->mComment           = $request->getText( 'wpUploadDescription' );
  65                 $this->mForReUpload       = $request->getBool( 'wpForReUpload' );
  66                 $this->mReUpload          = $request->getCheck( 'wpReUpload' );
  67
  68                 if( !$request->wasPosted() ) {
  69                         # GET requests just give the main form; no data except destination
  70                         # filename and description
  71                         return;
  72                 }
  73
  74                 # Placeholders for text injection by hooks (empty per default)
  75                 $this->uploadFormTextTop = "";
  76                 $this->uploadFormTextAfterSummary = "";
  77                 $this->mUploadClicked     = $request->getCheck( 'wpUpload' );
  78
  79                 $this->mLicense           = $request->getText( 'wpLicense' );
  80                 $this->mCopyrightStatus   = $request->getText( 'wpUploadCopyStatus' );
  81                 $this->mCopyrightSource   = $request->getText( 'wpUploadSource' );
  82                 $this->mWatchthis         = $request->getBool( 'wpWatchthis' );
  83                 $this->mSourceType        = $request->getText( 'wpSourceType' );
  84                 $this->mDestWarningAck    = $request->getText( 'wpDestFileWarningAck' );
  85
  86                 $this->mAction            = $request->getVal( 'action' );
  87
  88                 $this->mSessionKey        = $request->getInt( 'wpSessionKey' );
  89                 if( !empty( $this->mSessionKey ) &&
  90                         isset( $_SESSION['wsUploadData'][$this->mSessionKey]['version'] ) &&
  91                         $_SESSION['wsUploadData'][$this->mSessionKey]['version'] == self::SESSION_VERSION ) {
  92                         /**
  93                          * Confirming a temporarily stashed upload.
  94                          * We don't want path names to be forged, so we keep
  95                          * them in the session on the server and just give
  96                          * an opaque key to the user agent.
  97                          */
  98                         $data = $_SESSION['wsUploadData'][$this->mSessionKey];
  99                         $this->mTempPath         = $data['mTempPath'];
 100                         $this->mFileSize         = $data['mFileSize'];
 101                         $this->mSrcName          = $data['mSrcName'];
 102                         $this->mFileProps        = $data['mFileProps'];
 103                         $this->mCurlError        = 0/*UPLOAD_ERR_OK*/;
 104                         $this->mStashed          = true;
 105                         $this->mRemoveTempFile   = false;
 106                 } else {
 107                         /**
 108                          *Check for a newly uploaded file.
 109                          */
 110                         if( $wgAllowCopyUploads && $this->mSourceType == 'web' ) {
 111                                 $this->initializeFromUrl( $request );
 112                         } else {
 113                                 $this->initializeFromUpload( $request );
 114                         }
 115                 }
 116         }
 117
 118         /**
 119          * Initialize the uploaded file from PHP data
 120          * @access private
 121          */
 122         function initializeFromUpload( $request ) {
 123                 $this->mTempPath       = $request->getFileTempName( 'wpUploadFile' );
 124                 $this->mFileSize       = $request->getFileSize( 'wpUploadFile' );
 125                 $this->mSrcName        = $request->getFileName( 'wpUploadFile' );
 126                 $this->mCurlError      = $request->getUploadError( 'wpUploadFile' );
 127                 $this->mSessionKey     = false;
 128                 $this->mStashed        = false;
 129                 $this->mRemoveTempFile = false; // PHP will handle this
 130         }
 131
 132         /**
 133          * Copy a web file to a temporary file
 134          * @access private
 135          */
 136         function initializeFromUrl( $request ) {
 137                 global $wgTmpDirectory;
 138                 $url = $request->getText( 'wpUploadFileURL' );
 139                 $local_file = tempnam( $wgTmpDirectory, 'WEBUPLOAD' );
 140
 141                 $this->mTempPath       = $local_file;
 142                 $this->mFileSize       = 0; # Will be set by curlCopy
 143                 $this->mCurlError      = $this->curlCopy( $url, $local_file );
 144                 $pathParts             = explode( '/', $url );
 145                 $this->mSrcName        = array_pop( $pathParts );
 146                 $this->mSessionKey     = false;
 147                 $this->mStashed        = false;
 148
 149                 // PHP won't auto-cleanup the file
 150                 $this->mRemoveTempFile = file_exists( $local_file );
 151         }
 152
 153         /**
 154          * Safe copy from URL
 155          * Returns true if there was an error, false otherwise
 156          */
 157         private function curlCopy( $url, $dest ) {
 158                 global $wgUser, $wgOut, $wgHTTPProxy, $wgCopyUploadTimeout;
 159
 160                 if( !$wgUser->isAllowed( 'upload_by_url' ) ) {
 161                         $wgOut->permissionRequired( 'upload_by_url' );
 162                         return true;
 163                 }
 164
 165                 # Maybe remove some pasting blanks :-)
 166                 $url =  trim( $url );
 167                 if( stripos($url, 'http://') !== 0 && stripos($url, 'ftp://') !== 0 ) {
 168                         # Only HTTP or FTP URLs
 169                         $wgOut->showErrorPage( 'upload-proto-error', 'upload-proto-error-text' );
 170                         return true;
 171                 }
 172
 173                 # Open temporary file
 174                 $this->mCurlDestHandle = @fopen( $this->mTempPath, "wb" );
 175                 if( $this->mCurlDestHandle === false ) {
 176                         # Could not open temporary file to write in
 177                         $wgOut->showErrorPage( 'upload-file-error', 'upload-file-error-text');
 178                         return true;
 179                 }
 180
 181                 $ch = curl_init();
 182                 curl_setopt( $ch, CURLOPT_HTTP_VERSION, 1.0); # Probably not needed, but apparently can work around some bug
 183                 curl_setopt( $ch, CURLOPT_TIMEOUT, $wgCopyUploadTimeout); # Default 30 seconds timeout
 184                 curl_setopt( $ch, CURLOPT_LOW_SPEED_LIMIT, 512); # 0.5KB per second minimum transfer speed
 185                 curl_setopt( $ch, CURLOPT_URL, $url);
 186                 if( $wgHTTPProxy ) {
 187                         curl_setopt( $ch, CURLOPT_PROXY, $wgHTTPProxy );
 188                 }
 189                 curl_setopt( $ch, CURLOPT_WRITEFUNCTION, array( $this, 'uploadCurlCallback' ) );
 190                 curl_exec( $ch );
 191                 $error = curl_errno( $ch ) ? true : false;
 192                 $errornum =  curl_errno( $ch );
 193                 // if ( $error ) print curl_error ( $ch ) ; # Debugging output
 194                 curl_close( $ch );
 195
 196                 fclose( $this->mCurlDestHandle );
 197                 unset( $this->mCurlDestHandle );
 198                 if( $error ) {
 199                         unlink( $dest );
 200                         if( wfEmptyMsg( "upload-curl-error$errornum", wfMsg("upload-curl-error$errornum") ) )
 201                                 $wgOut->showErrorPage( 'upload-misc-error', 'upload-misc-error-text' );
 202                         else
 203                                 $wgOut->showErrorPage( "upload-curl-error$errornum", "upload-curl-error$errornum-text" );
 204                 }
 205
 206                 return $error;
 207         }
 208
 209         /**
 210          * Callback function for CURL-based web transfer
 211          * Write data to file unless we've passed the length limit;
 212          * if so, abort immediately.
 213          * @access private
 214          */
 215         function uploadCurlCallback( $ch, $data ) {
 216                 global $wgMaxUploadSize;
 217                 $length = strlen( $data );
 218                 $this->mFileSize += $length;
 219                 if( $this->mFileSize > $wgMaxUploadSize ) {
 220                         return 0;
 221                 }
 222                 fwrite( $this->mCurlDestHandle, $data );
 223                 return $length;
 224         }
 225
 226         /**
 227          * Start doing stuff
 228          * @access public
 229          */
 230         function execute() {
 231                 global $wgUser, $wgOut;
 232                 global $wgEnableUploads;
 233
 234                 # Check php's file_uploads setting
 235                 if( !wfIniGetBool( 'file_uploads' ) ) {
 236                         $wgOut->showErrorPage( 'uploaddisabled', 'php-uploaddisabledtext', array( $this->mDesiredDestName ) );
 237                         return;
 238                 }
 239
 240                 # Check uploading enabled
 241                 if( !$wgEnableUploads ) {
 242                         $wgOut->showErrorPage( 'uploaddisabled', 'uploaddisabledtext', array( $this->mDesiredDestName ) );
 243                         return;
 244                 }
 245
 246                 # Check permissions
 247                 global $wgGroupPermissions;
 248                 if( !$wgUser->isAllowed( 'upload' ) ) {
 249                         if( !$wgUser->isLoggedIn() && ( $wgGroupPermissions['user']['upload']
 250                                 || $wgGroupPermissions['autoconfirmed']['upload'] ) ) {
 251                                 // Custom message if logged-in users without any special rights can upload
 252                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
 253                         } else {
 254                                 $wgOut->permissionRequired( 'upload' );
 255                         }
 256                         return;
 257                 }
 258
 259                 # Check blocks
 260                 if( $wgUser->isBlocked() ) {
 261                         $wgOut->blockedPage();
 262                         return;
 263                 }
 264
 265                 if( wfReadOnly() ) {
 266                         $wgOut->readOnlyPage();
 267                         return;
 268                 }
 269
 270                 if( $this->mReUpload ) {
 271                         if( !$this->unsaveUploadedFile() ) {
 272                                 return;
 273                         }
 274                         # Because it is probably checked and shouldn't be
 275                         $this->mIgnoreWarning = false;
 276
 277                         $this->mainUploadForm();
 278                 } else if( 'submit' == $this->mAction || $this->mUploadClicked ) {
 279                         $this->processUpload();
 280                 } else {
 281                         $this->mainUploadForm();
 282                 }
 283
 284                 $this->cleanupTempFile();
 285         }
 286
 287         /**
 288          * Do the upload
 289          * Checks are made in SpecialUpload::execute()
 290          *
 291          * @access private
 292          */
 293         function processUpload(){
 294                 global $wgOut, $wgFileExtensions, $wgLang;
 295                 $details = null;
 296                 $value = null;
 297                 $value = $this->internalProcessUpload( $details );
 298
 299                 switch($value) {
 300                         case self::SUCCESS:
 301                                 $wgOut->redirect( $this->mLocalFile->getTitle()->getFullURL() );
 302                                 break;
 303
 304                         case self::BEFORE_PROCESSING:
 305                                 break;
 306
 307                         case self::LARGE_FILE_SERVER:
 308                                 $this->mainUploadForm( wfMsgHtml( 'largefileserver' ) );
 309                                 break;
 310
 311                         case self::EMPTY_FILE:
 312                                 $this->mainUploadForm( wfMsgHtml( 'emptyfile' ) );
 313                                 break;
 314
 315                         case self::MIN_LENGTH_PARTNAME:
 316                                 $this->mainUploadForm( wfMsgHtml( 'minlength1' ) );
 317                                 break;
 318
 319                         case self::ILLEGAL_FILENAME:
 320                                 $filtered = $details['filtered'];
 321                                 $this->uploadError( wfMsgWikiHtml( 'illegalfilename', htmlspecialchars( $filtered ) ) );
 322                                 break;
 323
 324                         case self::PROTECTED_PAGE:
 325                                 $wgOut->showPermissionsErrorPage( $details['permissionserrors'] );
 326                                 break;
 327
 328                         case self::OVERWRITE_EXISTING_FILE:
 329                                 $errorText = $details['overwrite'];
 330                                 $this->uploadError( $wgOut->parse( $errorText ) );
 331                                 break;
 332
 333                         case self::FILETYPE_MISSING:
 334                                 $this->uploadError( wfMsgExt( 'filetype-missing', array ( 'parseinline' ) ) );
 335                                 break;
 336
 337                         case self::FILETYPE_BADTYPE:
 338                                 $finalExt = $details['finalExt'];
 339                                 $this->uploadError(
 340                                         wfMsgExt( 'filetype-banned-type',
 341                                                 array( 'parseinline' ),
 342                                                 htmlspecialchars( $finalExt ),
 343                                                 $wgLang->commaList( $wgFileExtensions ),
 344                                                 $wgLang->formatNum( count($wgFileExtensions) )
 345                                         )
 346                                 );
 347                                 break;
 348
 349                         case self::VERIFICATION_ERROR:
 350                                 $veri = $details['veri'];
 351                                 $this->uploadError( $veri->toString() );
 352                                 break;
 353
 354                         case self::UPLOAD_VERIFICATION_ERROR:
 355                                 $error = $details['error'];
 356                                 $this->uploadError( $error );
 357                                 break;
 358
 359                         case self::UPLOAD_WARNING:
 360                                 $warning = $details['warning'];
 361                                 $this->uploadWarning( $warning );
 362                                 break;
 363
 364                         case self::INTERNAL_ERROR:
 365                                 $internal = $details['internal'];
 366                                 $this->showError( $internal );
 367                                 break;
 368
 369                         default:
 370                                 throw new MWException( __METHOD__ . ": Unknown value `{$value}`" );
 371                 }
 372         }
 373
 374         /**
 375          * Really do the upload
 376          * Checks are made in SpecialUpload::execute()
 377          *
 378          * @param array $resultDetails contains result-specific dict of additional values
 379          *
 380          * @access private
 381          */
 382         function internalProcessUpload( &$resultDetails ) {
 383                 global $wgUser;
 384
 385                 if( !wfRunHooks( 'UploadForm:BeforeProcessing', array( &$this ) ) )
 386                 {
 387                         wfDebug( "Hook 'UploadForm:BeforeProcessing' broke processing the file.\n" );
 388                         return self::BEFORE_PROCESSING;
 389                 }
 390
 391                 /**
 392                  * If there was no filename or a zero size given, give up quick.
 393                  */
 394                 if( trim( $this->mSrcName ) == '' || empty( $this->mFileSize ) ) {
 395                         return self::EMPTY_FILE;
 396                 }
 397
 398                 /* Check for curl error */
 399                 if( $this->mCurlError ) {
 400                         return self::BEFORE_PROCESSING;
 401                 }
 402
 403                 /**
 404                  * Chop off any directories in the given filename. Then
 405                  * filter out illegal characters, and try to make a legible name
 406                  * out of it. We'll strip some silently that Title would die on.
 407                  */
 408                 if( $this->mDesiredDestName ) {
 409                         $basename = $this->mDesiredDestName;
 410                 } else {
 411                         $basename = $this->mSrcName;
 412                 }
 413                 $filtered = wfStripIllegalFilenameChars( $basename );
 414
 415                 /* Normalize to title form before we do any further processing */
 416                 $nt = Title::makeTitleSafe( NS_FILE, $filtered );
 417                 if( is_null( $nt ) ) {
 418                         $resultDetails = array( 'filtered' => $filtered );
 419                         return self::ILLEGAL_FILENAME;
 420                 }
 421                 $filtered = $nt->getDBkey();
 422
 423                 /**
 424                  * We'll want to blacklist against *any* 'extension', and use
 425                  * only the final one for the whitelist.
 426                  */
 427                 list( $partname, $ext ) = $this->splitExtensions( $filtered );
 428
 429                 if( count( $ext ) ) {
 430                         $finalExt = $ext[count( $ext ) - 1];
 431                 } else {
 432                         $finalExt = '';
 433                 }
 434
 435                 # If there was more than one "extension", reassemble the base
 436                 # filename to prevent bogus complaints about length
 437                 if( count( $ext ) > 1 ) {
 438                         for( $i = 0; $i < count( $ext ) - 1; $i++ )
 439                                 $partname .= '.' . $ext[$i];
 440                 }
 441
 442                 if( strlen( $partname ) < 1 ) {
 443                         return self::MIN_LENGTH_PARTNAME;
 444                 }
 445
 446                 $this->mLocalFile = wfLocalFile( $nt );
 447                 $this->mDestName = $this->mLocalFile->getName();
 448
 449                 /**
 450                  * If the image is protected, non-sysop users won't be able
 451                  * to modify it by uploading a new revision.
 452                  */
 453                 $permErrors = $nt->getUserPermissionsErrors( 'edit', $wgUser );
 454                 $permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $wgUser );
 455                 $permErrorsCreate = ( $nt->exists() ? array() : $nt->getUserPermissionsErrors( 'create', $wgUser ) );
 456
 457                 if( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
 458                         // merge all the problems into one list, avoiding duplicates
 459                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
 460                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );
 461                         $resultDetails = array( 'permissionserrors' => $permErrors );
 462                         return self::PROTECTED_PAGE;
 463                 }
 464
 465                 /**
 466                  * In some cases we may forbid overwriting of existing files.
 467                  */
 468                 $overwrite = $this->checkOverwrite( $this->mDestName );
 469                 if( $overwrite !== true ) {
 470                         $resultDetails = array( 'overwrite' => $overwrite );
 471                         return self::OVERWRITE_EXISTING_FILE;
 472                 }
 473
 474                 /* Don't allow users to override the blacklist (check file extension) */
 475                 global $wgCheckFileExtensions, $wgStrictFileExtensions;
 476                 global $wgFileExtensions, $wgFileBlacklist;
 477                 if ($finalExt == '') {
 478                         return self::FILETYPE_MISSING;
 479                 } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) ||
 480                                 ($wgCheckFileExtensions && $wgStrictFileExtensions &&
 481                                         !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) ) {
 482                         $resultDetails = array( 'finalExt' => $finalExt );
 483                         return self::FILETYPE_BADTYPE;
 484                 }
 485
 486                 /**
 487                  * Look at the contents of the file; if we can recognize the
 488                  * type but it's corrupt or data of the wrong type, we should
 489                  * probably not accept it.
 490                  */
 491                 if( !$this->mStashed ) {
 492                         $this->mFileProps = File::getPropsFromPath( $this->mTempPath, $finalExt );
 493                         $this->checkMacBinary();
 494                         $veri = $this->verify( $this->mTempPath, $finalExt );
 495
 496                         if( $veri !== true ) { //it's a wiki error...
 497                                 $resultDetails = array( 'veri' => $veri );
 498                                 return self::VERIFICATION_ERROR;
 499                         }
 500
 501                         /**
 502                          * Provide an opportunity for extensions to add further checks
 503                          */
 504                         $error = '';
 505                         if( !wfRunHooks( 'UploadVerification',
 506                                         array( $this->mDestName, $this->mTempPath, &$error ) ) ) {
 507                                 $resultDetails = array( 'error' => $error );
 508                                 return self::UPLOAD_VERIFICATION_ERROR;
 509                         }
 510                 }
 511
 512
 513                 /**
 514                  * Check for non-fatal conditions
 515                  */
 516                 if ( ! $this->mIgnoreWarning ) {
 517                         $warning = '';
 518
 519                         $comparableName = str_replace( ' ', '_', $basename );
 520                         global $wgCapitalLinks, $wgContLang;
 521                         if ( $wgCapitalLinks ) {
 522                                 $comparableName = $wgContLang->ucfirst( $comparableName );
 523                         }
 524
 525                         if( $comparableName !== $filtered ) {
 526                                 $warning .=  '<li>'.wfMsgHtml( 'badfilename', htmlspecialchars( $this->mDestName ) ).'</li>';
 527                         }
 528
 529                         global $wgCheckFileExtensions;
 530                         if ( $wgCheckFileExtensions ) {
 531                                 if ( !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) {
 532                                         global $wgLang;
 533                                         $warning .= '<li>' .
 534                                         wfMsgExt( 'filetype-unwanted-type',
 535                                                 array( 'parseinline' ),
 536                                                 htmlspecialchars( $finalExt ),
 537                                                 $wgLang->commaList( $wgFileExtensions ),
 538                                                 $wgLang->formatNum( count($wgFileExtensions) )
 539                                         ) . '</li>';
 540                                 }
 541                         }
 542
 543                         global $wgUploadSizeWarning;
 544                         if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) {
 545                                 $skin = $wgUser->getSkin();
 546                                 $wsize = $skin->formatSize( $wgUploadSizeWarning );
 547                                 $asize = $skin->formatSize( $this->mFileSize );
 548                                 $warning .= '<li>' . wfMsgHtml( 'large-file', $wsize, $asize ) . '</li>';
 549                         }
 550                         if ( $this->mFileSize == 0 ) {
 551                                 $warning .= '<li>'.wfMsgHtml( 'emptyfile' ).'</li>';
 552                         }
 553
 554                         if ( !$this->mDestWarningAck ) {
 555                                 $warning .= self::getExistsWarning( $this->mLocalFile );
 556                         }
 557
 558                         $warning .= $this->getDupeWarning( $this->mTempPath, $finalExt, $nt );
 559
 560                         if( $warning != '' ) {
 561                                 /**
 562                                  * Stash the file in a temporary location; the user can choose
 563                                  * to let it through and we'll complete the upload then.
 564                                  */
 565                                 $resultDetails = array( 'warning' => $warning );
 566                                 return self::UPLOAD_WARNING;
 567                         }
 568                 }
 569
 570                 /**
 571                  * Try actually saving the thing...
 572                  * It will show an error form on failure.
 573                  */
 574                 if( !$this->mForReUpload ) {
 575                         $pageText = self::getInitialPageText( $this->mComment, $this->mLicense,
 576                                 $this->mCopyrightStatus, $this->mCopyrightSource );
 577                 } else {
 578                         $pageText = false;
 579                 }
 580
 581                 $status = $this->mLocalFile->upload( $this->mTempPath, $this->mComment, $pageText,
 582                         File::DELETE_SOURCE, $this->mFileProps );
 583                 if ( !$status->isGood() ) {
 584                         $resultDetails = array( 'internal' => $status->getWikiText() );
 585                         return self::INTERNAL_ERROR;
 586                 } else {
 587                         if ( $this->mWatchthis ) {
 588                                 global $wgUser;
 589                                 $wgUser->addWatch( $this->mLocalFile->getTitle() );
 590                         }
 591                         // Success, redirect to description page
 592                         $img = null; // @todo: added to avoid passing a ref to null - should this be defined somewhere?
 593                         wfRunHooks( 'UploadComplete', array( &$this ) );
 594                         return self::SUCCESS;
 595                 }
 596         }
 597
 598         /**
 599          * Do existence checks on a file and produce a warning
 600          * This check is static and can be done pre-upload via AJAX
 601          * Returns an HTML fragment consisting of one or more LI elements if there is a warning
 602          * Returns an empty string if there is no warning
 603          */
 604         static function getExistsWarning( $file ) {
 605                 global $wgUser, $wgContLang;
 606                 // Check for uppercase extension. We allow these filenames but check if an image
 607                 // with lowercase extension exists already
 608                 $warning = '';
 609                 $align = $wgContLang->isRtl() ? 'left' : 'right';
 610
 611                 if( strpos( $file->getName(), '.' ) == false ) {
 612                         $partname = $file->getName();
 613                         $rawExtension = '';
 614                 } else {
 615                         $n = strrpos( $file->getName(), '.' );
 616                         $rawExtension = substr( $file->getName(), $n + 1 );
 617                         $partname = substr( $file->getName(), 0, $n );
 618                 }
 619
 620                 $sk = $wgUser->getSkin();
 621
 622                 if ( $rawExtension != $file->getExtension() ) {
 623                         // We're not using the normalized form of the extension.
 624                         // Normal form is lowercase, using most common of alternate
 625                         // extensions (eg 'jpg' rather than 'JPEG').
 626                         //
 627                         // Check for another file using the normalized form...
 628                         $nt_lc = Title::makeTitle( NS_FILE, $partname . '.' . $file->getExtension() );
 629                         $file_lc = wfLocalFile( $nt_lc );
 630                 } else {
 631                         $file_lc = false;
 632                 }
 633
 634                 if( $file->exists() ) {
 635                         $dlink = $sk->makeKnownLinkObj( $file->getTitle() );
 636                         if ( $file->allowInlineDisplay() ) {
 637                                 $dlink2 = $sk->makeImageLinkObj( $file->getTitle(), wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 638                                         $file->getName(), $align, array(), false, true );
 639                         } elseif ( !$file->allowInlineDisplay() && $file->isSafeFile() ) {
 640                                 $icon = $file->iconThumb();
 641                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 642                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 643                         } else {
 644                                 $dlink2 = '';
 645                         }
 646
 647                         $warning .= '<li>' . wfMsgExt( 'fileexists', array('parseinline','replaceafter'), $dlink ) . '</li>' . $dlink2;
 648
 649                 } elseif( $file->getTitle()->getArticleID() ) {
 650                         $lnk = $sk->makeKnownLinkObj( $file->getTitle(), '', 'redirect=no' );
 651                         $warning .= '<li>' . wfMsgExt( 'filepageexists', array( 'parseinline', 'replaceafter' ), $lnk ) . '</li>';
 652                 } elseif ( $file_lc && $file_lc->exists() ) {
 653                         # Check if image with lowercase extension exists.
 654                         # It's not forbidden but in 99% it makes no sense to upload the same filename with uppercase extension
 655                         $dlink = $sk->makeKnownLinkObj( $nt_lc );
 656                         if ( $file_lc->allowInlineDisplay() ) {
 657                                 $dlink2 = $sk->makeImageLinkObj( $nt_lc, wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 658                                         $nt_lc->getText(), $align, array(), false, true );
 659                         } elseif ( !$file_lc->allowInlineDisplay() && $file_lc->isSafeFile() ) {
 660                                 $icon = $file_lc->iconThumb();
 661                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 662                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 663                         } else {
 664                                 $dlink2 = '';
 665                         }
 666
 667                         $warning .= '<li>' .
 668                                 wfMsgExt( 'fileexists-extension', 'parsemag',
 669                                         $file->getTitle()->getPrefixedText(), $dlink ) .
 670                                 '</li>' . $dlink2;
 671
 672                 } elseif ( ( substr( $partname , 3, 3 ) == 'px-' || substr( $partname , 2, 3 ) == 'px-' )
 673                         && preg_match( "/[0-9]{2}/" , substr( $partname , 0, 2 ) ) )
 674                 {
 675                         # Check for filenames like 50px- or 180px-, these are mostly thumbnails
 676                         $nt_thb = Title::newFromText( substr( $partname , strpos( $partname , '-' ) +1 ) . '.' . $rawExtension );
 677                         $file_thb = wfLocalFile( $nt_thb );
 678                         if ($file_thb->exists() ) {
 679                                 # Check if an image without leading '180px-' (or similiar) exists
 680                                 $dlink = $sk->makeKnownLinkObj( $nt_thb);
 681                                 if ( $file_thb->allowInlineDisplay() ) {
 682                                         $dlink2 = $sk->makeImageLinkObj( $nt_thb,
 683                                                 wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 684                                                 $nt_thb->getText(), $align, array(), false, true );
 685                                 } elseif ( !$file_thb->allowInlineDisplay() && $file_thb->isSafeFile() ) {
 686                                         $icon = $file_thb->iconThumb();
 687                                         $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 688                                                 $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' .
 689                                                 $dlink . '</div>';
 690                                 } else {
 691                                         $dlink2 = '';
 692                                 }
 693
 694                                 $warning .= '<li>' . wfMsgExt( 'fileexists-thumbnail-yes', 'parsemag', $dlink ) .
 695                                         '</li>' . $dlink2;
 696                         } else {
 697                                 # Image w/o '180px-' does not exists, but we do not like these filenames
 698                                 $warning .= '<li>' . wfMsgExt( 'file-thumbnail-no', 'parseinline' ,
 699                                         substr( $partname , 0, strpos( $partname , '-' ) +1 ) ) . '</li>';
 700                         }
 701                 }
 702
 703                 $filenamePrefixBlacklist = self::getFilenamePrefixBlacklist();
 704                 # Do the match
 705                 foreach( $filenamePrefixBlacklist as $prefix ) {
 706                         if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
 707                                 $warning .= '<li>' . wfMsgExt( 'filename-bad-prefix', 'parseinline', $prefix ) . '</li>';
 708                                 break;
 709                         }
 710                 }
 711
 712                 if ( $file->wasDeleted() && !$file->exists() ) {
 713                         # If the file existed before and was deleted, warn the user of this
 714                         # Don't bother doing so if the file exists now, however
 715                         $ltitle = SpecialPage::getTitleFor( 'Log' );
 716                         $llink = $sk->makeKnownLinkObj( $ltitle, wfMsgHtml( 'deletionlog' ),
 717                                 'type=delete&page=' . $file->getTitle()->getPrefixedUrl() );
 718                         $warning .= '<li>' . wfMsgWikiHtml( 'filewasdeleted', $llink ) . '</li>';
 719                 }
 720                 return $warning;
 721         }
 722
 723         /**
 724          * Get a list of warnings
 725          *
 726          * @param string local filename, e.g. 'file exists', 'non-descriptive filename'
 727          * @return array list of warning messages
 728          */
 729         static function ajaxGetExistsWarning( $filename ) {
 730                 $file = wfFindFile( $filename );
 731                 if( !$file ) {
 732                         // Force local file so we have an object to do further checks against
 733                         // if there isn't an exact match...
 734                         $file = wfLocalFile( $filename );
 735                 }
 736                 $s = '&nbsp;';
 737                 if ( $file ) {
 738                         $warning = self::getExistsWarning( $file );
 739                         if ( $warning !== '' ) {
 740                                 $s = "<ul>$warning</ul>";
 741                         }
 742                 }
 743                 return $s;
 744         }
 745
 746         /**
 747          * Render a preview of a given license for the AJAX preview on upload
 748          *
 749          * @param string $license
 750          * @return string
 751          */
 752         public static function ajaxGetLicensePreview( $license ) {
 753                 global $wgParser, $wgUser;
 754                 $text = '{{' . $license . '}}';
 755                 $title = Title::makeTitle( NS_FILE, 'Sample.jpg' );
 756                 $options = ParserOptions::newFromUser( $wgUser );
 757
 758                 // Expand subst: first, then live templates...
 759                 $text = $wgParser->preSaveTransform( $text, $title, $wgUser, $options );
 760                 $output = $wgParser->parse( $text, $title, $options );
 761
 762                 return $output->getText();
 763         }
 764
 765         /**
 766          * Check for duplicate files and throw up a warning before the upload
 767          * completes.
 768          */
 769         function getDupeWarning( $tempfile, $extension, $destinationTitle ) {
 770                 $hash = File::sha1Base36( $tempfile );
 771                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 772                 $archivedImage = new ArchivedFile( null, 0, $hash.".$extension" );
 773                 if( $dupes ) {
 774                         global $wgOut;
 775                         $msg = "<gallery>";
 776                         foreach( $dupes as $file ) {
 777                                 $title = $file->getTitle();
 778                                 # Don't throw the warning when the titles are the same, it's a reupload
 779                                 # and highly redundant.
 780                                 if ( !$title->equals( $destinationTitle ) || !$this->mForReUpload ) {
 781                                         $msg .= $title->getPrefixedText() .
 782                                                 "|" . $title->getText() . "\n";
 783                                 }
 784                         }
 785                         $msg .= "</gallery>";
 786                         return "<li>" .
 787                                 wfMsgExt( "file-exists-duplicate", array( "parse" ), count( $dupes ) ) .
 788                                 $wgOut->parse( $msg ) .
 789                                 "</li>\n";
 790                 } elseif ( $archivedImage->getID() > 0 ) {
 791                         global $wgOut;
 792                         $name = Title::makeTitle( NS_FILE, $archivedImage->getName() )->getPrefixedText();
 793                         return Xml::tags( 'li', null, wfMsgExt( 'file-deleted-duplicate', array( 'parseinline' ), array( $name ) ) );
 794                 } else {
 795                         return '';
 796                 }
 797         }
 798
 799         /**
 800          * Get a list of blacklisted filename prefixes from [[MediaWiki:filename-prefix-blacklist]]
 801          *
 802          * @return array list of prefixes
 803          */
 804         public static function getFilenamePrefixBlacklist() {
 805                 $blacklist = array();
 806                 $message = wfMsgForContent( 'filename-prefix-blacklist' );
 807                 if( $message && !( wfEmptyMsg( 'filename-prefix-blacklist', $message ) || $message == '-' ) ) {
 808                         $lines = explode( "\n", $message );
 809                         foreach( $lines as $line ) {
 810                                 // Remove comment lines
 811                                 $comment = substr( trim( $line ), 0, 1 );
 812                                 if ( $comment == '#' || $comment == '' ) {
 813                                         continue;
 814                                 }
 815                                 // Remove additional comments after a prefix
 816                                 $comment = strpos( $line, '#' );
 817                                 if ( $comment > 0 ) {
 818                                         $line = substr( $line, 0, $comment-1 );
 819                                 }
 820                                 $blacklist[] = trim( $line );
 821                         }
 822                 }
 823                 return $blacklist;
 824         }
 825
 826         /**
 827          * Stash a file in a temporary directory for later processing
 828          * after the user has confirmed it.
 829          *
 830          * If the user doesn't explicitly cancel or accept, these files
 831          * can accumulate in the temp directory.
 832          *
 833          * @param string $saveName - the destination filename
 834          * @param string $tempName - the source temporary file to save
 835          * @return string - full path the stashed file, or false on failure
 836          * @access private
 837          */
 838         function saveTempUploadedFile( $saveName, $tempName ) {
 839                 global $wgOut;
 840                 $repo = RepoGroup::singleton()->getLocalRepo();
 841                 $status = $repo->storeTemp( $saveName, $tempName );
 842                 if ( !$status->isGood() ) {
 843                         $this->showError( $status->getWikiText() );
 844                         return false;
 845                 } else {
 846                         return $status->value;
 847                 }
 848         }
 849
 850         /**
 851          * Stash a file in a temporary directory for later processing,
 852          * and save the necessary descriptive info into the session.
 853          * Returns a key value which will be passed through a form
 854          * to pick up the path info on a later invocation.
 855          *
 856          * @return int
 857          * @access private
 858          */
 859         function stashSession() {
 860                 $stash = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath );
 861
 862                 if( !$stash ) {
 863                         # Couldn't save the file.
 864                         return false;
 865                 }
 866
 867                 $key = mt_rand( 0, 0x7fffffff );
 868                 $_SESSION['wsUploadData'][$key] = array(
 869                         'mTempPath'       => $stash,
 870                         'mFileSize'       => $this->mFileSize,
 871                         'mSrcName'        => $this->mSrcName,
 872                         'mFileProps'      => $this->mFileProps,
 873                         'version'         => self::SESSION_VERSION,
 874                 );
 875                 return $key;
 876         }
 877
 878         /**
 879          * Remove a temporarily kept file stashed by saveTempUploadedFile().
 880          * @access private
 881          * @return success
 882          */
 883         function unsaveUploadedFile() {
 884                 global $wgOut;
 885                 if( !$this->mTempPath ) return true; // nothing to delete
 886                 $repo = RepoGroup::singleton()->getLocalRepo();
 887                 $success = $repo->freeTemp( $this->mTempPath );
 888                 if ( ! $success ) {
 889                         $wgOut->showFileDeleteError( $this->mTempPath );
 890                         return false;
 891                 } else {
 892                         return true;
 893                 }
 894         }
 895
 896         /* -------------------------------------------------------------- */
 897
 898         /**
 899          * @param string $error as HTML
 900          * @access private
 901          */
 902         function uploadError( $error ) {
 903                 global $wgOut;
 904                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 905                 $wgOut->addHTML( '<span class="error">' . $error . '</span>' );
 906         }
 907
 908         /**
 909          * There's something wrong with this file, not enough to reject it
 910          * totally but we require manual intervention to save it for real.
 911          * Stash it away, then present a form asking to confirm or cancel.
 912          *
 913          * @param string $warning as HTML
 914          * @access private
 915          */
 916         function uploadWarning( $warning ) {
 917                 global $wgOut;
 918                 global $wgUseCopyrightUpload;
 919
 920                 $this->mSessionKey = $this->stashSession();
 921                 if( !$this->mSessionKey ) {
 922                         # Couldn't save file; an error has been displayed so let's go.
 923                         return;
 924                 }
 925
 926                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 927                 $wgOut->addHTML( '<ul class="warning">' . $warning . "</ul>\n" );
 928
 929                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
 930
 931                 if ( $wgUseCopyrightUpload ) {
 932                         $copyright = Xml::hidden( 'wpUploadCopyStatus', $this->mCopyrightStatus ) . "\n" .
 933                                         Xml::hidden( 'wpUploadSource', $this->mCopyrightSource ) . "\n";
 934                 } else {
 935                         $copyright = '';
 936                 }
 937
 938                 $wgOut->addHTML(
 939                         Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL( 'action=submit' ),
 940                                  'enctype' => 'multipart/form-data', 'id' => 'uploadwarning' ) ) . "\n" .
 941                         Xml::hidden( 'wpIgnoreWarning', '1' ) . "\n" .
 942                         Xml::hidden( 'wpSessionKey', $this->mSessionKey ) . "\n" .
 943                         Xml::hidden( 'wpUploadDescription', $this->mComment ) . "\n" .
 944                         Xml::hidden( 'wpLicense', $this->mLicense ) . "\n" .
 945                         Xml::hidden( 'wpDestFile', $this->mDesiredDestName ) . "\n" .
 946                         Xml::hidden( 'wpWatchthis', $this->mWatchthis ) . "\n" .
 947                         "{$copyright}<br />" .
 948                         Xml::submitButton( wfMsg( 'ignorewarning' ), array ( 'name' => 'wpUpload', 'id' => 'wpUpload', 'checked' => 'checked' ) ) . ' ' .
 949                         Xml::submitButton( wfMsg( 'reuploaddesc' ), array ( 'name' => 'wpReUpload', 'id' => 'wpReUpload' ) ) .
 950                         Xml::closeElement( 'form' ) . "\n"
 951                 );
 952         }
 953
 954         /**
 955          * Displays the main upload form, optionally with a highlighted
 956          * error message up at the top.
 957          *
 958          * @param string $msg as HTML
 959          * @access private
 960          */
 961         function mainUploadForm( $msg='' ) {
 962                 global $wgOut, $wgUser, $wgLang, $wgMaxUploadSize;
 963                 global $wgUseCopyrightUpload, $wgUseAjax, $wgAjaxUploadDestCheck, $wgAjaxLicensePreview;
 964                 global $wgRequest, $wgAllowCopyUploads;
 965                 global $wgStylePath, $wgStyleVersion;
 966
 967                 $useAjaxDestCheck = $wgUseAjax && $wgAjaxUploadDestCheck;
 968                 $useAjaxLicensePreview = $wgUseAjax && $wgAjaxLicensePreview;
 969
 970                 $adc = wfBoolToStr( $useAjaxDestCheck );
 971                 $alp = wfBoolToStr( $useAjaxLicensePreview );
 972                 $autofill = wfBoolToStr( $this->mDesiredDestName == '' );
 973
 974                 $wgOut->addScript( "<script type=\"text/javascript\">
 975 wgAjaxUploadDestCheck = {$adc};
 976 wgAjaxLicensePreview = {$alp};
 977 wgUploadAutoFill = {$autofill};
 978 </script>" );
 979                 $wgOut->addScriptFile( 'upload.js' );
 980                 $wgOut->addScriptFile( 'edit.js' ); // For <charinsert> support
 981
 982                 if( !wfRunHooks( 'UploadForm:initial', array( &$this ) ) )
 983                 {
 984                         wfDebug( "Hook 'UploadForm:initial' broke output of the upload form\n" );
 985                         return false;
 986                 }
 987
 988                 if( $this->mDesiredDestName ) {
 989                         $title = Title::makeTitleSafe( NS_FILE, $this->mDesiredDestName );
 990                         // Show a subtitle link to deleted revisions (to sysops et al only)
 991                         if( $title instanceof Title && ( $count = $title->isDeleted() ) > 0 && $wgUser->isAllowed( 'deletedhistory' ) ) {
 992                                 $link = wfMsgExt(
 993                                         $wgUser->isAllowed( 'delete' ) ? 'thisisdeleted' : 'viewdeleted',
 994                                         array( 'parse', 'replaceafter' ),
 995                                         $wgUser->getSkin()->makeKnownLinkObj(
 996                                                 SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedText() ),
 997                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $count )
 998                                         )
 999                                 );
1000                                 $wgOut->addHTML( "<div id=\"contentSub2\">{$link}</div>" );
1001                         }
1002
1003                         // Show the relevant lines from deletion log (for still deleted files only)
1004                         if( $title instanceof Title && $title->isDeletedQuick() && !$title->exists() ) {
1005                                 $this->showDeletionLog( $wgOut, $title->getPrefixedText() );
1006                         }
1007                 }
1008
1009                 $cols = intval($wgUser->getOption( 'cols' ));
1010
1011                 if( $wgUser->getOption( 'editwidth' ) ) {
1012                         $width = " style=\"width:100%\"";
1013                 } else {
1014                         $width = '';
1015                 }
1016
1017                 if ( '' != $msg ) {
1018                         $sub = wfMsgHtml( 'uploaderror' );
1019                         $wgOut->addHTML( "<h2>{$sub}</h2>\n" .
1020                           "<span class='error'>{$msg}</span>\n" );
1021                 }
1022                 $wgOut->addHTML( '<div id="uploadtext">' );
1023                 $wgOut->addWikiMsg( 'uploadtext', $this->mDesiredDestName );
1024                 $wgOut->addHTML( "</div>\n" );
1025
1026                 # Print a list of allowed file extensions, if so configured.  We ignore
1027                 # MIME type here, it's incomprehensible to most people and too long.
1028                 global $wgCheckFileExtensions, $wgStrictFileExtensions,
1029                 $wgFileExtensions, $wgFileBlacklist;
1030
1031                 $allowedExtensions = '';
1032                 if( $wgCheckFileExtensions ) {
1033                         if( $wgStrictFileExtensions ) {
1034                                 # Everything not permitted is banned
1035                                 $extensionsList =
1036                                         '<div id="mw-upload-permitted">' .
1037                                         wfMsgWikiHtml( 'upload-permitted', $wgLang->commaList( $wgFileExtensions ) ) .
1038                                         "</div>\n";
1039                         } else {
1040                                 # We have to list both preferred and prohibited
1041                                 $extensionsList =
1042                                         '<div id="mw-upload-preferred">' .
1043                                         wfMsgWikiHtml( 'upload-preferred', $wgLang->commaList( $wgFileExtensions ) ) .
1044                                         "</div>\n" .
1045                                         '<div id="mw-upload-prohibited">' .
1046                                         wfMsgWikiHtml( 'upload-prohibited', $wgLang->commaList( $wgFileBlacklist ) ) .
1047                                         "</div>\n";
1048                         }
1049                 } else {
1050                         # Everything is permitted.
1051                         $extensionsList = '';
1052                 }
1053
1054                 # Get the maximum file size from php.ini as $wgMaxUploadSize works for uploads from URL via CURL only
1055                 # See http://www.php.net/manual/en/faq.using.php#faq.using.shorthandbytes for possible values of upload_max_filesize and post_max_filesize
1056                 $max_sizes = array();
1057                 $max_sizes[] = trim( ini_get( 'upload_max_filesize' ) );
1058                 $max_sizes[] = trim( ini_get( 'post_max_size' ) );
1059                 foreach( $max_sizes as &$size) {
1060                         $last = strtoupper( substr( $size, -1 ) );
1061                         switch( $last ) {
1062                                 case 'G':
1063                                         $size = substr( $size, 0, -1 ) * 1024 * 1024 * 1024;
1064                                         break;
1065                                 case 'M':
1066                                         $size = substr( $size, 0, -1 ) * 1024 * 1024;
1067                                         break;
1068                                 case 'K':
1069                                         $size = substr( $size, 0, -1 ) * 1024;
1070                                         break;
1071                         }
1072                 }
1073                 $val = min( $max_sizes[0], $max_sizes[1] );
1074                 $val = $wgAllowCopyUploads ? min( $wgMaxUploadSize, $val ) : $val;
1075                 $maxUploadSize = '<div id="mw-upload-maxfilesize">' .
1076                         wfMsgExt( 'upload-maxfilesize', array( 'parseinline', 'escapenoentities' ),
1077                                 $wgLang->formatSize( $val ) ) .
1078                                 "</div>\n";
1079
1080                 $sourcefilename = wfMsgExt( 'sourcefilename', array( 'parseinline', 'escapenoentities' ) );
1081         $destfilename = wfMsgExt( 'destfilename', array( 'parseinline', 'escapenoentities' ) );
1082
1083                 $msg = $this->mForReUpload ? 'filereuploadsummary' : 'fileuploadsummary';
1084                 $summary = wfMsgExt( $msg, 'parseinline' );
1085
1086                 $licenses = new Licenses();
1087                 $license = wfMsgExt( 'license', array( 'parseinline' ) );
1088                 $nolicense = wfMsgHtml( 'nolicense' );
1089                 $licenseshtml = $licenses->getHtml();
1090
1091                 $ulb = wfMsgHtml( 'uploadbtn' );
1092
1093
1094                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
1095
1096                 $encDestName = htmlspecialchars( $this->mDesiredDestName );
1097
1098                 $watchChecked = $this->watchCheck() ? 'checked="checked"' : '';
1099                 # Re-uploads should not need "file exist already" warnings
1100                 $warningChecked = ($this->mIgnoreWarning || $this->mForReUpload) ? 'checked="checked"' : '';
1101
1102                 // Prepare form for upload or upload/copy
1103                 if( $wgAllowCopyUploads && $wgUser->isAllowed( 'upload_by_url' ) ) {
1104                         $filename_form =
1105                                 "<input type='radio' id='wpSourceTypeFile' name='wpSourceType' value='file' " .
1106                                    "onchange='toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\")' checked='checked' />" .
1107                                  "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1108                                    "onfocus='" .
1109                                      "toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\");" .
1110                                      "toggle_element_check(\"wpSourceTypeFile\",\"wpSourceTypeURL\")' " .
1111                                      "onchange='fillDestFilename(\"wpUploadFile\")' size='60' />" .
1112                                 wfMsgHTML( 'upload_source_file' ) . "<br/>" .
1113                                 "<input type='radio' id='wpSourceTypeURL' name='wpSourceType' value='web' " .
1114                                   "onchange='toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\")' />" .
1115                                 "<input tabindex='1' type='text' name='wpUploadFileURL' id='wpUploadFileURL' " .
1116                                   "onfocus='" .
1117                                     "toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\");" .
1118                                     "toggle_element_check(\"wpSourceTypeURL\",\"wpSourceTypeFile\")' " .
1119                                     "onchange='fillDestFilename(\"wpUploadFileURL\")' size='60' disabled='disabled' />" .
1120                                 wfMsgHtml( 'upload_source_url' ) ;
1121                 } else {
1122                         $filename_form =
1123                                 "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1124                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") .
1125                                 "size='60' />" .
1126                                 "<input type='hidden' name='wpSourceType' value='file' />" ;
1127                 }
1128                 if ( $useAjaxDestCheck ) {
1129                         $warningRow = "<tr><td colspan='2' id='wpDestFile-warning'>&nbsp;</td></tr>";
1130                         $destOnkeyup = 'onkeyup="wgUploadWarningObj.keypress();"';
1131                 } else {
1132                         $warningRow = '';
1133                         $destOnkeyup = '';
1134                 }
1135                 $encComment = htmlspecialchars( $this->mComment );
1136
1137
1138                 $wgOut->addHTML(
1139                          Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL(),
1140                                  'enctype' => 'multipart/form-data', 'id' => 'mw-upload-form' ) ) .
1141                          Xml::openElement( 'fieldset' ) .
1142                          Xml::element( 'legend', null, wfMsg( 'upload' ) ) .
1143                          Xml::openElement( 'table', array( 'border' => '0', 'id' => 'mw-upload-table' ) ) .
1144                          "<tr>
1145                                 {$this->uploadFormTextTop}
1146                                 <td class='mw-label'>
1147                                         <label for='wpUploadFile'>{$sourcefilename}</label>
1148                                 </td>
1149                                 <td class='mw-input'>
1150                                         {$filename_form}
1151                                 </td>
1152                         </tr>
1153                         <tr>
1154                                 <td></td>
1155                                 <td>
1156                                         {$maxUploadSize}
1157                                         {$extensionsList}
1158                                 </td>
1159                         </tr>
1160                         <tr>
1161                                 <td class='mw-label'>
1162                                         <label for='wpDestFile'>{$destfilename}</label>
1163                                 </td>
1164                                 <td class='mw-input'>"
1165                 );
1166                 if( $this->mForReUpload ) {
1167                         $wgOut->addHTML(
1168                                 Xml::hidden( 'wpDestFile', $this->mDesiredDestName, array('id'=>'wpDestFile','tabindex'=>2) ) .
1169                                 "<tt>" .
1170                                 $encDestName .
1171                                 "</tt>"
1172                         );
1173                 }
1174                 else {
1175                         $wgOut->addHTML(
1176                                 "<input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='60'
1177                                                 value=\"{$encDestName}\" onchange='toggleFilenameFiller()' $destOnkeyup />"
1178                         );
1179                 }
1180
1181
1182                 $wgOut->addHTML(
1183                                 "</td>
1184                         </tr>
1185                         <tr>
1186                                 <td class='mw-label'>
1187                                         <label for='wpUploadDescription'>{$summary}</label>
1188                                 </td>
1189                                 <td class='mw-input'>
1190                                         <textarea tabindex='3' name='wpUploadDescription' id='wpUploadDescription' rows='6'
1191                                                 cols='{$cols}'{$width}>$encComment</textarea>
1192                                         {$this->uploadFormTextAfterSummary}
1193                                 </td>
1194                         </tr>
1195                         <tr>"
1196                 );
1197                 # Re-uploads should not need license info
1198                 if ( !$this->mForReUpload && $licenseshtml != '' ) {
1199                         global $wgStylePath;
1200                         $wgOut->addHTML( "
1201                                         <td class='mw-label'>
1202                                                 <label for='wpLicense'>$license</label>
1203                                         </td>
1204                                         <td class='mw-input'>
1205                                                 <select name='wpLicense' id='wpLicense' tabindex='4'
1206                                                         onchange='licenseSelectorCheck()'>
1207                                                         <option value=''>$nolicense</option>
1208                                                         $licenseshtml
1209                                                 </select>
1210                                         </td>
1211                                 </tr>
1212                                 <tr>"
1213                         );
1214                         if( $useAjaxLicensePreview ) {
1215                                 $wgOut->addHTML( "
1216                                                 <td></td>
1217                                                 <td id=\"mw-license-preview\"></td>
1218                                         </tr>
1219                                         <tr>"
1220                                 );
1221                         }
1222                 }
1223
1224                 if ( !$this->mForReUpload && $wgUseCopyrightUpload ) {
1225                         $filestatus = wfMsgExt( 'filestatus', 'escapenoentities' );
1226                         $copystatus =  htmlspecialchars( $this->mCopyrightStatus );
1227                         $filesource = wfMsgExt( 'filesource', 'escapenoentities' );
1228                         $uploadsource = htmlspecialchars( $this->mCopyrightSource );
1229
1230                         $wgOut->addHTML( "
1231                                         <td class='mw-label' style='white-space: nowrap;'>
1232                                                 <label for='wpUploadCopyStatus'>$filestatus</label></td>
1233                                         <td class='mw-input'>
1234                                                 <input tabindex='5' type='text' name='wpUploadCopyStatus' id='wpUploadCopyStatus'
1235                                                         value=\"$copystatus\" size='60' />
1236                                         </td>
1237                                 </tr>
1238                                 <tr>
1239                                         <td class='mw-label'>
1240                                                 <label for='wpUploadCopyStatus'>$filesource</label>
1241                                         </td>
1242                                         <td class='mw-input'>
1243                                                 <input tabindex='6' type='text' name='wpUploadSource' id='wpUploadCopyStatus'
1244                                                         value=\"$uploadsource\" size='60' />
1245                                         </td>
1246                                 </tr>
1247                                 <tr>"
1248                         );
1249                 }
1250
1251                 $wgOut->addHTML( "
1252                                 <td></td>
1253                                 <td>
1254                                         <input tabindex='7' type='checkbox' name='wpWatchthis' id='wpWatchthis' $watchChecked value='true' />
1255                                         <label for='wpWatchthis'>" . wfMsgHtml( 'watchthisupload' ) . "</label>
1256                                         <input tabindex='8' type='checkbox' name='wpIgnoreWarning' id='wpIgnoreWarning' value='true' $warningChecked />
1257                                         <label for='wpIgnoreWarning'>" . wfMsgHtml( 'ignorewarnings' ) . "</label>
1258                                 </td>
1259                         </tr>
1260                         $warningRow
1261                         <tr>
1262                                 <td></td>
1263                                         <td class='mw-input'>
1264                                                 <input tabindex='9' type='submit' name='wpUpload' value=\"{$ulb}\"" .
1265                                                         $wgUser->getSkin()->tooltipAndAccesskey( 'upload' ) . " />
1266                                         </td>
1267                         </tr>
1268                         <tr>
1269                                 <td></td>
1270                                 <td class='mw-input'>"
1271                 );
1272                 $wgOut->addHTML( '<div class="mw-editTools">' );
1273                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1274                 $wgOut->addHTML( '</div>' );
1275                 $wgOut->addHTML( "
1276                                 </td>
1277                         </tr>" .
1278                         Xml::closeElement( 'table' ) .
1279                         Xml::hidden( 'wpDestFileWarningAck', '', array( 'id' => 'wpDestFileWarningAck' ) ) .
1280                         Xml::hidden( 'wpForReUpload', $this->mForReUpload, array( 'id' => 'wpForReUpload' ) ) .
1281                         Xml::closeElement( 'fieldset' ) .
1282                         Xml::closeElement( 'form' )
1283                 );
1284                 $uploadfooter = wfMsgNoTrans( 'uploadfooter' );
1285                 if( $uploadfooter != '-' && !wfEmptyMsg( 'uploadfooter', $uploadfooter ) ){
1286                         $wgOut->addWikiText( '<div id="mw-upload-footer-message">' . $uploadfooter . '</div>' );
1287                 }
1288         }
1289
1290         /* -------------------------------------------------------------- */
1291
1292         /**
1293          * See if we should check the 'watch this page' checkbox on the form
1294          * based on the user's preferences and whether we're being asked
1295          * to create a new file or update an existing one.
1296          *
1297          * In the case where 'watch edits' is off but 'watch creations' is on,
1298          * we'll leave the box unchecked.
1299          *
1300          * Note that the page target can be changed *on the form*, so our check
1301          * state can get out of sync.
1302          */
1303         function watchCheck() {
1304                 global $wgUser;
1305                 if( $wgUser->getOption( 'watchdefault' ) ) {
1306                         // Watch all edits!
1307                         return true;
1308                 }
1309
1310                 $local = wfLocalFile( $this->mDesiredDestName );
1311                 if( $local && $local->exists() ) {
1312                         // We're uploading a new version of an existing file.
1313                         // No creation, so don't watch it if we're not already.
1314                         return $local->getTitle()->userIsWatching();
1315                 } else {
1316                         // New page should get watched if that's our option.
1317                         return $wgUser->getOption( 'watchcreations' );
1318                 }
1319         }
1320
1321         /**
1322          * Split a file into a base name and all dot-delimited 'extensions'
1323          * on the end. Some web server configurations will fall back to
1324          * earlier pseudo-'extensions' to determine type and execute
1325          * scripts, so the blacklist needs to check them all.
1326          *
1327          * @return array
1328          */
1329         public function splitExtensions( $filename ) {
1330                 $bits = explode( '.', $filename );
1331                 $basename = array_shift( $bits );
1332                 return array( $basename, $bits );
1333         }
1334
1335         /**
1336          * Perform case-insensitive match against a list of file extensions.
1337          * Returns true if the extension is in the list.
1338          *
1339          * @param string $ext
1340          * @param array $list
1341          * @return bool
1342          */
1343         function checkFileExtension( $ext, $list ) {
1344                 return in_array( strtolower( $ext ), $list );
1345         }
1346
1347         /**
1348          * Perform case-insensitive match against a list of file extensions.
1349          * Returns true if any of the extensions are in the list.
1350          *
1351          * @param array $ext
1352          * @param array $list
1353          * @return bool
1354          */
1355         public function checkFileExtensionList( $ext, $list ) {
1356                 foreach( $ext as $e ) {
1357                         if( in_array( strtolower( $e ), $list ) ) {
1358                                 return true;
1359                         }
1360                 }
1361                 return false;
1362         }
1363
1364         /**
1365          * Verifies that it's ok to include the uploaded file
1366          *
1367          * @param string $tmpfile the full path of the temporary file to verify
1368          * @param string $extension The filename extension that the file is to be served with
1369          * @return mixed true of the file is verified, a WikiError object otherwise.
1370          */
1371         function verify( $tmpfile, $extension ) {
1372                 #magically determine mime type
1373                 $magic = MimeMagic::singleton();
1374                 $mime = $magic->guessMimeType($tmpfile,false);
1375
1376
1377                 #check mime type, if desired
1378                 global $wgVerifyMimeType;
1379                 if ($wgVerifyMimeType) {
1380                         wfDebug ( "\n\nmime: <$mime> extension: <$extension>\n\n");
1381                         #check mime type against file extension
1382                         if( !self::verifyExtension( $mime, $extension ) ) {
1383                                 return new WikiErrorMsg( 'uploadcorrupt' );
1384                         }
1385
1386                         #check mime type blacklist
1387                         global $wgMimeTypeBlacklist;
1388                         if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist) ) {
1389                                 if ( $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
1390                                         return new WikiErrorMsg( 'filetype-badmime', htmlspecialchars( $mime ) );
1391                                 }
1392
1393                                 # Check IE type
1394                                 $fp = fopen( $tmpfile, 'rb' );
1395                                 $chunk = fread( $fp, 256 );
1396                                 fclose( $fp );
1397                                 $extMime = $magic->guessTypesForExtension( $extension );
1398                                 $ieTypes = $magic->getIEMimeTypes( $tmpfile, $chunk, $extMime );
1399                                 foreach ( $ieTypes as $ieType ) {
1400                                         if ( $this->checkFileExtension( $ieType, $wgMimeTypeBlacklist ) ) {
1401                                                 return new WikiErrorMsg( 'filetype-bad-ie-mime', $ieType );
1402                                         }
1403                                 }
1404                         }
1405                 }
1406
1407                 #check for htmlish code and javascript
1408                 if( $this->detectScript ( $tmpfile, $mime, $extension ) ) {
1409                         return new WikiErrorMsg( 'uploadscripted' );
1410                 }
1411                 if( $extension == 'svg' || $mime == 'image/svg+xml' ) {
1412                         if( $this->detectScriptInSvg( $tmpfile ) ) {
1413                                 return new WikiErrorMsg( 'uploadscripted' );
1414                         }
1415                 }
1416
1417                 /**
1418                 * Scan the uploaded file for viruses
1419                 */
1420                 $virus= $this->detectVirus($tmpfile);
1421                 if ( $virus ) {
1422                         return new WikiErrorMsg( 'uploadvirus', htmlspecialchars($virus) );
1423                 }
1424
1425                 wfDebug( __METHOD__.": all clear; passing.\n" );
1426                 return true;
1427         }
1428
1429         /**
1430          * Checks if the mime type of the uploaded file matches the file extension.
1431          *
1432          * @param string $mime the mime type of the uploaded file
1433          * @param string $extension The filename extension that the file is to be served with
1434          * @return bool
1435          */
1436         static function verifyExtension( $mime, $extension ) {
1437                 $magic = MimeMagic::singleton();
1438
1439                 if ( ! $mime || $mime == 'unknown' || $mime == 'unknown/unknown' )
1440                         if ( ! $magic->isRecognizableExtension( $extension ) ) {
1441                                 wfDebug( __METHOD__.": passing file with unknown detected mime type; " .
1442                                         "unrecognized extension '$extension', can't verify\n" );
1443                                 return true;
1444                         } else {
1445                                 wfDebug( __METHOD__.": rejecting file with unknown detected mime type; ".
1446                                         "recognized extension '$extension', so probably invalid file\n" );
1447                                 return false;
1448                         }
1449
1450                 $match= $magic->isMatchingExtension($extension,$mime);
1451
1452                 if ($match===NULL) {
1453                         wfDebug( __METHOD__.": no file extension known for mime type $mime, passing file\n" );
1454                         return true;
1455                 } elseif ($match===true) {
1456                         wfDebug( __METHOD__.": mime type $mime matches extension $extension, passing file\n" );
1457
1458                         #TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
1459                         return true;
1460
1461                 } else {
1462                         wfDebug( __METHOD__.": mime type $mime mismatches file extension $extension, rejecting file\n" );
1463                         return false;
1464                 }
1465         }
1466
1467
1468         /**
1469          * Heuristic for detecting files that *could* contain JavaScript instructions or
1470          * things that may look like HTML to a browser and are thus
1471          * potentially harmful. The present implementation will produce false positives in some situations.
1472          *
1473          * @param string $file Pathname to the temporary upload file
1474          * @param string $mime The mime type of the file
1475          * @param string $extension The extension of the file
1476          * @return bool true if the file contains something looking like embedded scripts
1477          */
1478         function detectScript($file, $mime, $extension) {
1479                 global $wgAllowTitlesInSVG;
1480
1481                 #ugly hack: for text files, always look at the entire file.
1482                 #For binarie field, just check the first K.
1483
1484                 if (strpos($mime,'text/')===0) $chunk = file_get_contents( $file );
1485                 else {
1486                         $fp = fopen( $file, 'rb' );
1487                         $chunk = fread( $fp, 1024 );
1488                         fclose( $fp );
1489                 }
1490
1491                 $chunk= strtolower( $chunk );
1492
1493                 if (!$chunk) return false;
1494
1495                 #decode from UTF-16 if needed (could be used for obfuscation).
1496                 if (substr($chunk,0,2)=="\xfe\xff") $enc= "UTF-16BE";
1497                 elseif (substr($chunk,0,2)=="\xff\xfe") $enc= "UTF-16LE";
1498                 else $enc= NULL;
1499
1500                 if ($enc) $chunk= iconv($enc,"ASCII//IGNORE",$chunk);
1501
1502                 $chunk= trim($chunk);
1503
1504                 #FIXME: convert from UTF-16 if necessarry!
1505
1506                 wfDebug("SpecialUpload::detectScript: checking for embedded scripts and HTML stuff\n");
1507
1508                 #check for HTML doctype
1509                 if ( preg_match( "/<!DOCTYPE *X?HTML/i", $chunk ) ) return true;
1510
1511                 /**
1512                 * Internet Explorer for Windows performs some really stupid file type
1513                 * autodetection which can cause it to interpret valid image files as HTML
1514                 * and potentially execute JavaScript, creating a cross-site scripting
1515                 * attack vectors.
1516                 *
1517                 * Apple's Safari browser also performs some unsafe file type autodetection
1518                 * which can cause legitimate files to be interpreted as HTML if the
1519                 * web server is not correctly configured to send the right content-type
1520                 * (or if you're really uploading plain text and octet streams!)
1521                 *
1522                 * Returns true if IE is likely to mistake the given file for HTML.
1523                 * Also returns true if Safari would mistake the given file for HTML
1524                 * when served with a generic content-type.
1525                 */
1526
1527                 $tags = array(
1528                         '<a href',
1529                         '<body',
1530                         '<head',
1531                         '<html',   #also in safari
1532                         '<img',
1533                         '<pre',
1534                         '<script', #also in safari
1535                         '<table'
1536                         );
1537                 if( ! $wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
1538                         $tags[] = '<title';
1539                 }
1540
1541                 foreach( $tags as $tag ) {
1542                         if( false !== strpos( $chunk, $tag ) ) {
1543                                 return true;
1544                         }
1545                 }
1546
1547                 /*
1548                 * look for javascript
1549                 */
1550
1551                 #resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1552                 $chunk = Sanitizer::decodeCharReferences( $chunk );
1553
1554                 #look for script-types
1555                 if (preg_match('!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim',$chunk)) return true;
1556
1557                 #look for html-style script-urls
1558                 if (preg_match('!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1559
1560                 #look for css-style script-urls
1561                 if (preg_match('!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1562
1563                 wfDebug("SpecialUpload::detectScript: no scripts found\n");
1564                 return false;
1565         }
1566
1567         function detectScriptInSvg( $filename ) {
1568                 $check = new XmlTypeCheck( $filename, array( $this, 'checkSvgScriptCallback' ) );
1569                 return $check->filterMatch;
1570         }
1571
1572         /**
1573          * @todo Replace this with a whitelist filter!
1574          */
1575         function checkSvgScriptCallback( $element, $attribs ) {
1576                 $stripped = $this->stripXmlNamespace( $element );
1577
1578                 if( $stripped == 'script' ) {
1579                         wfDebug( __METHOD__ . ": Found script element '$element' in uploaded file.\n" );
1580                         return true;
1581                 }
1582
1583                 foreach( $attribs as $attrib => $value ) {
1584                         $stripped = $this->stripXmlNamespace( $attrib );
1585                         if( substr( $stripped, 0, 2 ) == 'on' ) {
1586                                 wfDebug( __METHOD__ . ": Found script attribute '$attrib'='value' in uploaded file.\n" );
1587                                 return true;
1588                         }
1589                         if( $stripped == 'href' && strpos( strtolower( $value ), 'javascript:' ) !== false ) {
1590                                 wfDebug( __METHOD__ . ": Found script href attribute '$attrib'='$value' in uploaded file.\n" );
1591                                 return true;
1592                         }
1593                 }
1594         }
1595
1596         private function stripXmlNamespace( $name ) {
1597                 // 'http://www.w3.org/2000/svg:script' -> 'script'
1598                 $parts = explode( ':', strtolower( $name ) );
1599                 return array_pop( $parts );
1600         }
1601
1602         /**
1603          * Generic wrapper function for a virus scanner program.
1604          * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
1605          * $wgAntivirusRequired may be used to deny upload if the scan fails.
1606          *
1607          * @param string $file Pathname to the temporary upload file
1608          * @return mixed false if not virus is found, NULL if the scan fails or is disabled,
1609          *         or a string containing feedback from the virus scanner if a virus was found.
1610          *         If textual feedback is missing but a virus was found, this function returns true.
1611          */
1612         function detectVirus($file) {
1613                 global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
1614
1615                 if ( !$wgAntivirus ) {
1616                         wfDebug( __METHOD__.": virus scanner disabled\n");
1617                         return NULL;
1618                 }
1619
1620                 if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1621                         wfDebug( __METHOD__.": unknown virus scanner: $wgAntivirus\n" );
1622                         $wgOut->wrapWikiMsg( '<div class="error">$1</div>', array( 'virus-badscanner', $wgAntivirus ) );
1623                         return wfMsg('virus-unknownscanner') . " $wgAntivirus";
1624                 }
1625
1626                 # look up scanner configuration
1627                 $command = $wgAntivirusSetup[$wgAntivirus]["command"];
1628                 $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]["codemap"];
1629                 $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]["messagepattern"] ) ?
1630                         $wgAntivirusSetup[$wgAntivirus]["messagepattern"] : null;
1631
1632                 if ( strpos( $command,"%f" ) === false ) {
1633                         # simple pattern: append file to scan
1634                         $command .= " " . wfEscapeShellArg( $file );
1635                 } else {
1636                         # complex pattern: replace "%f" with file to scan
1637                         $command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
1638                 }
1639
1640                 wfDebug( __METHOD__.": running virus scan: $command \n" );
1641
1642                 # execute virus scanner
1643                 $exitCode = false;
1644
1645                 #NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1646                 #      that does not seem to be worth the pain.
1647                 #      Ask me (Duesentrieb) about it if it's ever needed.
1648                 $output = array();
1649                 if ( wfIsWindows() ) {
1650                         exec( "$command", $output, $exitCode );
1651                 } else {
1652                         exec( "$command 2>&1", $output, $exitCode );
1653                 }
1654
1655                 # map exit code to AV_xxx constants.
1656                 $mappedCode = $exitCode;
1657                 if ( $exitCodeMap ) {
1658                         if ( isset( $exitCodeMap[$exitCode] ) ) {
1659                                 $mappedCode = $exitCodeMap[$exitCode];
1660                         } elseif ( isset( $exitCodeMap["*"] ) ) {
1661                                 $mappedCode = $exitCodeMap["*"];
1662                         }
1663                 }
1664
1665                 if ( $mappedCode === AV_SCAN_FAILED ) {
1666                         # scan failed (code was mapped to false by $exitCodeMap)
1667                         wfDebug( __METHOD__.": failed to scan $file (code $exitCode).\n" );
1668
1669                         if ( $wgAntivirusRequired ) {
1670                                 return wfMsg('virus-scanfailed', array( $exitCode ) );
1671                         } else {
1672                                 return NULL;
1673                         }
1674                 } else if ( $mappedCode === AV_SCAN_ABORTED ) {
1675                         # scan failed because filetype is unknown (probably imune)
1676                         wfDebug( __METHOD__.": unsupported file type $file (code $exitCode).\n" );
1677                         return NULL;
1678                 } else if ( $mappedCode === AV_NO_VIRUS ) {
1679                         # no virus found
1680                         wfDebug( __METHOD__.": file passed virus scan.\n" );
1681                         return false;
1682                 } else {
1683                         $output = join( "\n", $output );
1684                         $output = trim( $output );
1685
1686                         if ( !$output ) {
1687                                 $output = true; #if there's no output, return true
1688                         } elseif ( $msgPattern ) {
1689                                 $groups = array();
1690                                 if ( preg_match( $msgPattern, $output, $groups ) ) {
1691                                         if ( $groups[1] ) {
1692                                                 $output = $groups[1];
1693                                         }
1694                                 }
1695                         }
1696
1697                         wfDebug( __METHOD__.": FOUND VIRUS! scanner feedback: $output \n" );
1698                         return $output;
1699                 }
1700         }
1701
1702         /**
1703          * Check if the temporary file is MacBinary-encoded, as some uploads
1704          * from Internet Explorer on Mac OS Classic and Mac OS X will be.
1705          * If so, the data fork will be extracted to a second temporary file,
1706          * which will then be checked for validity and either kept or discarded.
1707          *
1708          * @access private
1709          */
1710         function checkMacBinary() {
1711                 $macbin = new MacBinary( $this->mTempPath );
1712                 if( $macbin->isValid() ) {
1713                         $dataFile = tempnam( wfTempDir(), "WikiMacBinary" );
1714                         $dataHandle = fopen( $dataFile, 'wb' );
1715
1716                         wfDebug( "SpecialUpload::checkMacBinary: Extracting MacBinary data fork to $dataFile\n" );
1717                         $macbin->extractData( $dataHandle );
1718
1719                         $this->mTempPath = $dataFile;
1720                         $this->mFileSize = $macbin->dataForkLength();
1721
1722                         // We'll have to manually remove the new file if it's not kept.
1723                         $this->mRemoveTempFile = true;
1724                 }
1725                 $macbin->close();
1726         }
1727
1728         /**
1729          * If we've modified the upload file we need to manually remove it
1730          * on exit to clean up.
1731          * @access private
1732          */
1733         function cleanupTempFile() {
1734                 if ( $this->mRemoveTempFile && $this->mTempPath && file_exists( $this->mTempPath ) ) {
1735                         wfDebug( "SpecialUpload::cleanupTempFile: Removing temporary file {$this->mTempPath}\n" );
1736                         unlink( $this->mTempPath );
1737                 }
1738         }
1739
1740         /**
1741          * Check if there's an overwrite conflict and, if so, if restrictions
1742          * forbid this user from performing the upload.
1743          *
1744          * @return mixed true on success, WikiError on failure
1745          * @access private
1746          */
1747         function checkOverwrite( $name ) {
1748                 $img = wfFindFile( $name );
1749
1750                 $error = '';
1751                 if( $img ) {
1752                         global $wgUser, $wgOut;
1753                         if( $img->isLocal() ) {
1754                                 if( !self::userCanReUpload( $wgUser, $img->name ) ) {
1755                                         $error = 'fileexists-forbidden';
1756                                 }
1757                         } else {
1758                                 if( !$wgUser->isAllowed( 'reupload' ) ||
1759                                     !$wgUser->isAllowed( 'reupload-shared' ) ) {
1760                                         $error = "fileexists-shared-forbidden";
1761                                 }
1762                         }
1763                 }
1764
1765                 if( $error ) {
1766                         $errorText = wfMsg( $error, wfEscapeWikiText( $img->getName() ) );
1767                         return $errorText;
1768                 }
1769
1770                 // Rockin', go ahead and upload
1771                 return true;
1772         }
1773
1774          /**
1775          * Check if a user is the last uploader
1776          *
1777          * @param User $user
1778          * @param string $img, image name
1779          * @return bool
1780          */
1781         public static function userCanReUpload( User $user, $img ) {
1782                 if( $user->isAllowed( 'reupload' ) )
1783                         return true; // non-conditional
1784                 if( !$user->isAllowed( 'reupload-own' ) )
1785                         return false;
1786
1787                 $dbr = wfGetDB( DB_SLAVE );
1788                 $row = $dbr->selectRow('image',
1789                 /* SELECT */ 'img_user',
1790                 /* WHERE */ array( 'img_name' => $img )
1791                 );
1792                 if ( !$row )
1793                         return false;
1794
1795                 return $user->getId() == $row->img_user;
1796         }
1797
1798         /**
1799          * Display an error with a wikitext description
1800          */
1801         function showError( $description ) {
1802                 global $wgOut;
1803                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
1804                 $wgOut->setRobotPolicy( "noindex,nofollow" );
1805                 $wgOut->setArticleRelated( false );
1806                 $wgOut->enableClientCache( false );
1807                 $wgOut->addWikiText( $description );
1808         }
1809
1810         /**
1811          * Get the initial image page text based on a comment and optional file status information
1812          */
1813         static function getInitialPageText( $comment, $license, $copyStatus, $source ) {
1814                 global $wgUseCopyrightUpload;
1815                 if ( $wgUseCopyrightUpload ) {
1816                         if ( $license != '' ) {
1817                                 $licensetxt = '== ' . wfMsgForContent( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1818                         }
1819                         $pageText = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n" .
1820                           '== ' . wfMsgForContent ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
1821                           "$licensetxt" .
1822                           '== ' . wfMsgForContent ( 'filesource' ) . " ==\n" . $source ;
1823                 } else {
1824                         if ( $license != '' ) {
1825                                 $filedesc = $comment == '' ? '' : '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n";
1826                                  $pageText = $filedesc .
1827                                          '== ' . wfMsgForContent ( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1828                         } else {
1829                                 $pageText = $comment;
1830                         }
1831                 }
1832                 return $pageText;
1833         }
1834
1835         /**
1836          * If there are rows in the deletion log for this file, show them,
1837          * along with a nice little note for the user
1838          *
1839          * @param OutputPage $out
1840          * @param string filename
1841          */
1842         private function showDeletionLog( $out, $filename ) {
1843                 global $wgUser;
1844                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
1845                 $pager = new LogPager( $loglist, 'delete', false, $filename );
1846                 if( $pager->getNumRows() > 0 ) {
1847                         $out->addHTML( '<div class="mw-warning-with-logexcerpt">' );
1848                         $out->addWikiMsg( 'upload-wasdeleted' );
1849                         $out->addHTML(
1850                                 $loglist->beginLogEventsList() .
1851                                 $pager->getBody() .
1852                                 $loglist->endLogEventsList()
1853                         );
1854                         $out->addHTML( '</div>' );
1855                 }
1856         }
1857 }