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           = $request->getText( 'wpUploadDescription' );
  65
  66                 if( !$request->wasPosted() ) {
  67                         # GET requests just give the main form; no data except destination
  68                         # filename and description
  69                         return;
  70                 }
  71
  72                 # Placeholders for text injection by hooks (empty per default)
  73                 $this->uploadFormTextTop = "";
  74                 $this->uploadFormTextAfterSummary = "";
  75
  76                 $this->mReUpload          = $request->getCheck( 'wpReUpload' );
  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, $wgOut;
 159
 160                 if( !$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, 10); # 10 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                 curl_setopt( $ch, CURLOPT_WRITEFUNCTION, array( $this, 'uploadCurlCallback' ) );
 187                 curl_exec( $ch );
 188                 $error = curl_errno( $ch ) ? true : false;
 189                 $errornum =  curl_errno( $ch );
 190                 // if ( $error ) print curl_error ( $ch ) ; # Debugging output
 191                 curl_close( $ch );
 192
 193                 fclose( $this->mCurlDestHandle );
 194                 unset( $this->mCurlDestHandle );
 195                 if( $error ) {
 196                         unlink( $dest );
 197                         if( wfEmptyMsg( "upload-curl-error$errornum", wfMsg("upload-curl-error$errornum") ) )
 198                                 $wgOut->showErrorPage( 'upload-misc-error', 'upload-misc-error-text' );
 199                         else
 200                                 $wgOut->showErrorPage( "upload-curl-error$errornum", "upload-curl-error$errornum-text" );
 201                 }
 202
 203                 return $error;
 204         }
 205
 206         /**
 207          * Callback function for CURL-based web transfer
 208          * Write data to file unless we've passed the length limit;
 209          * if so, abort immediately.
 210          * @access private
 211          */
 212         function uploadCurlCallback( $ch, $data ) {
 213                 global $wgMaxUploadSize;
 214                 $length = strlen( $data );
 215                 $this->mFileSize += $length;
 216                 if( $this->mFileSize > $wgMaxUploadSize ) {
 217                         return 0;
 218                 }
 219                 fwrite( $this->mCurlDestHandle, $data );
 220                 return $length;
 221         }
 222
 223         /**
 224          * Start doing stuff
 225          * @access public
 226          */
 227         function execute() {
 228                 global $wgUser, $wgOut;
 229                 global $wgEnableUploads;
 230
 231                 # Check uploading enabled
 232                 if( !$wgEnableUploads ) {
 233                         $wgOut->showErrorPage( 'uploaddisabled', 'uploaddisabledtext', array( $this->mDesiredDestName ) );
 234                         return;
 235                 }
 236
 237                 # Check permissions
 238                 if( !$wgUser->isAllowed( 'upload' ) ) {
 239                         if( !$wgUser->isLoggedIn() ) {
 240                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
 241                         } else {
 242                                 $wgOut->permissionRequired( 'upload' );
 243                         }
 244                         return;
 245                 }
 246
 247                 # Check blocks
 248                 if( $wgUser->isBlocked() ) {
 249                         $wgOut->blockedPage();
 250                         return;
 251                 }
 252
 253                 if( wfReadOnly() ) {
 254                         $wgOut->readOnlyPage();
 255                         return;
 256                 }
 257
 258                 if( $this->mReUpload ) {
 259                         if( !$this->unsaveUploadedFile() ) {
 260                                 return;
 261                         }
 262                         # Because it is probably checked and shouldn't be
 263                         $this->mIgnoreWarning = false;
 264
 265                         $this->mainUploadForm();
 266                 } else if( 'submit' == $this->mAction || $this->mUploadClicked ) {
 267                         $this->processUpload();
 268                 } else {
 269                         $this->mainUploadForm();
 270                 }
 271
 272                 $this->cleanupTempFile();
 273         }
 274
 275         /**
 276          * Do the upload
 277          * Checks are made in SpecialUpload::execute()
 278          *
 279          * @access private
 280          */
 281         function processUpload(){
 282                 global $wgUser, $wgOut, $wgFileExtensions, $wgLang;
 283                 $details = null;
 284                 $value = null;
 285                 $value = $this->internalProcessUpload( $details );
 286
 287                 switch($value) {
 288                         case self::SUCCESS:
 289                                 $wgOut->redirect( $this->mLocalFile->getTitle()->getFullURL() );
 290                                 break;
 291
 292                         case self::BEFORE_PROCESSING:
 293                                 break;
 294
 295                         case self::LARGE_FILE_SERVER:
 296                                 $this->mainUploadForm( wfMsgHtml( 'largefileserver' ) );
 297                                 break;
 298
 299                         case self::EMPTY_FILE:
 300                                 $this->mainUploadForm( wfMsgHtml( 'emptyfile' ) );
 301                                 break;
 302
 303                         case self::MIN_LENGTH_PARTNAME:
 304                                 $this->mainUploadForm( wfMsgHtml( 'minlength1' ) );
 305                                 break;
 306
 307                         case self::ILLEGAL_FILENAME:
 308                                 $filtered = $details['filtered'];
 309                                 $this->uploadError( wfMsgWikiHtml( 'illegalfilename', htmlspecialchars( $filtered ) ) );
 310                                 break;
 311
 312                         case self::PROTECTED_PAGE:
 313                                 $wgOut->showPermissionsErrorPage( $details['permissionserrors'] );
 314                                 break;
 315
 316                         case self::OVERWRITE_EXISTING_FILE:
 317                                 $errorText = $details['overwrite'];
 318                                 $this->uploadError( $wgOut->parse( $errorText ) );
 319                                 break;
 320
 321                         case self::FILETYPE_MISSING:
 322                                 $this->uploadError( wfMsgExt( 'filetype-missing', array ( 'parseinline' ) ) );
 323                                 break;
 324
 325                         case self::FILETYPE_BADTYPE:
 326                                 $finalExt = $details['finalExt'];
 327                                 $this->uploadError(
 328                                         wfMsgExt( 'filetype-banned-type',
 329                                                 array( 'parseinline' ),
 330                                                 htmlspecialchars( $finalExt ),
 331                                                 $wgLang->commaList( $wgFileExtensions ),
 332                                                 $wgLang->formatNum( count($wgFileExtensions) )
 333                                         )
 334                                 );
 335                                 break;
 336
 337                         case self::VERIFICATION_ERROR:
 338                                 $veri = $details['veri'];
 339                                 $this->uploadError( $veri->toString() );
 340                                 break;
 341
 342                         case self::UPLOAD_VERIFICATION_ERROR:
 343                                 $error = $details['error'];
 344                                 $this->uploadError( $error );
 345                                 break;
 346
 347                         case self::UPLOAD_WARNING:
 348                                 $warning = $details['warning'];
 349                                 $this->uploadWarning( $warning );
 350                                 break;
 351
 352                         case self::INTERNAL_ERROR:
 353                                 $internal = $details['internal'];
 354                                 $this->showError( $internal );
 355                                 break;
 356
 357                         default:
 358                                 throw new MWException( __METHOD__ . ": Unknown value `{$value}`" );
 359                 }
 360         }
 361
 362         /**
 363          * Really do the upload
 364          * Checks are made in SpecialUpload::execute()
 365          *
 366          * @param array $resultDetails contains result-specific dict of additional values
 367          *
 368          * @access private
 369          */
 370         function internalProcessUpload( &$resultDetails ) {
 371                 global $wgUser;
 372
 373                 if( !wfRunHooks( 'UploadForm:BeforeProcessing', array( &$this ) ) )
 374                 {
 375                         wfDebug( "Hook 'UploadForm:BeforeProcessing' broke processing the file.\n" );
 376                         return self::BEFORE_PROCESSING;
 377                 }
 378
 379                 /**
 380                  * If there was no filename or a zero size given, give up quick.
 381                  */
 382                 if( trim( $this->mSrcName ) == '' || empty( $this->mFileSize ) ) {
 383                         return self::EMPTY_FILE;
 384                 }
 385
 386                 /* Check for curl error */
 387                 if( $this->mCurlError ) {
 388                         return self::BEFORE_PROCESSING;
 389                 }
 390
 391                 /**
 392                  * Chop off any directories in the given filename. Then
 393                  * filter out illegal characters, and try to make a legible name
 394                  * out of it. We'll strip some silently that Title would die on.
 395                  */
 396                 if( $this->mDesiredDestName ) {
 397                         $basename = $this->mDesiredDestName;
 398                 } else {
 399                         $basename = $this->mSrcName;
 400                 }
 401                 $filtered = wfStripIllegalFilenameChars( $basename );
 402
 403                 /* Normalize to title form before we do any further processing */
 404                 $nt = Title::makeTitleSafe( NS_FILE, $filtered );
 405                 if( is_null( $nt ) ) {
 406                         $resultDetails = array( 'filtered' => $filtered );
 407                         return self::ILLEGAL_FILENAME;
 408                 }
 409                 $filtered = $nt->getDBkey();
 410
 411                 /**
 412                  * We'll want to blacklist against *any* 'extension', and use
 413                  * only the final one for the whitelist.
 414                  */
 415                 list( $partname, $ext ) = $this->splitExtensions( $filtered );
 416
 417                 if( count( $ext ) ) {
 418                         $finalExt = $ext[count( $ext ) - 1];
 419                 } else {
 420                         $finalExt = '';
 421                 }
 422
 423                 # If there was more than one "extension", reassemble the base
 424                 # filename to prevent bogus complaints about length
 425                 if( count( $ext ) > 1 ) {
 426                         for( $i = 0; $i < count( $ext ) - 1; $i++ )
 427                                 $partname .= '.' . $ext[$i];
 428                 }
 429
 430                 if( strlen( $partname ) < 1 ) {
 431                         return self::MIN_LENGTH_PARTNAME;
 432                 }
 433
 434                 $this->mLocalFile = wfLocalFile( $nt );
 435                 $this->mDestName = $this->mLocalFile->getName();
 436
 437                 /**
 438                  * If the image is protected, non-sysop users won't be able
 439                  * to modify it by uploading a new revision.
 440                  */
 441                 $permErrors = $nt->getUserPermissionsErrors( 'edit', $wgUser );
 442                 $permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $wgUser );
 443                 $permErrorsCreate = ( $nt->exists() ? array() : $nt->getUserPermissionsErrors( 'create', $wgUser ) );
 444
 445                 if( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
 446                         // merge all the problems into one list, avoiding duplicates
 447                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
 448                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );
 449                         $resultDetails = array( 'permissionserrors' => $permErrors );
 450                         return self::PROTECTED_PAGE;
 451                 }
 452
 453                 /**
 454                  * In some cases we may forbid overwriting of existing files.
 455                  */
 456                 $overwrite = $this->checkOverwrite( $this->mDestName );
 457                 if( $overwrite !== true ) {
 458                         $resultDetails = array( 'overwrite' => $overwrite );
 459                         return self::OVERWRITE_EXISTING_FILE;
 460                 }
 461
 462                 /* Don't allow users to override the blacklist (check file extension) */
 463                 global $wgCheckFileExtensions, $wgStrictFileExtensions;
 464                 global $wgFileExtensions, $wgFileBlacklist;
 465                 if ($finalExt == '') {
 466                         return self::FILETYPE_MISSING;
 467                 } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) ||
 468                                 ($wgCheckFileExtensions && $wgStrictFileExtensions &&
 469                                         !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) ) {
 470                         $resultDetails = array( 'finalExt' => $finalExt );
 471                         return self::FILETYPE_BADTYPE;
 472                 }
 473
 474                 /**
 475                  * Look at the contents of the file; if we can recognize the
 476                  * type but it's corrupt or data of the wrong type, we should
 477                  * probably not accept it.
 478                  */
 479                 if( !$this->mStashed ) {
 480                         $this->mFileProps = File::getPropsFromPath( $this->mTempPath, $finalExt );
 481                         $this->checkMacBinary();
 482                         $veri = $this->verify( $this->mTempPath, $finalExt );
 483
 484                         if( $veri !== true ) { //it's a wiki error...
 485                                 $resultDetails = array( 'veri' => $veri );
 486                                 return self::VERIFICATION_ERROR;
 487                         }
 488
 489                         /**
 490                          * Provide an opportunity for extensions to add further checks
 491                          */
 492                         $error = '';
 493                         if( !wfRunHooks( 'UploadVerification',
 494                                         array( $this->mDestName, $this->mTempPath, &$error ) ) ) {
 495                                 $resultDetails = array( 'error' => $error );
 496                                 return self::UPLOAD_VERIFICATION_ERROR;
 497                         }
 498                 }
 499
 500
 501                 /**
 502                  * Check for non-fatal conditions
 503                  */
 504                 if ( ! $this->mIgnoreWarning ) {
 505                         $warning = '';
 506
 507                         global $wgCapitalLinks;
 508                         if ( $wgCapitalLinks ) ucfirst( $basename );
 509
 510                         if( str_replace( ' ', '_', $basename ) != $filtered ) {
 511                                 $warning .=  '<li>'.wfMsgHtml( 'badfilename', htmlspecialchars( $this->mDestName ) ).'</li>';
 512                         }
 513
 514                         global $wgCheckFileExtensions;
 515                         if ( $wgCheckFileExtensions ) {
 516                                 if ( !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) {
 517                                         global $wgLang;
 518                                         $warning .= '<li>' .
 519                                         wfMsgExt( 'filetype-unwanted-type',
 520                                                 array( 'parseinline' ),
 521                                                 htmlspecialchars( $finalExt ),
 522                                                 $wgLang->commaList( $wgFileExtensions ),
 523                                                 $wgLang->formatNum( count($wgFileExtensions) )
 524                                         ) . '</li>';
 525                                 }
 526                         }
 527
 528                         global $wgUploadSizeWarning;
 529                         if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) {
 530                                 $skin = $wgUser->getSkin();
 531                                 $wsize = $skin->formatSize( $wgUploadSizeWarning );
 532                                 $asize = $skin->formatSize( $this->mFileSize );
 533                                 $warning .= '<li>' . wfMsgHtml( 'large-file', $wsize, $asize ) . '</li>';
 534                         }
 535                         if ( $this->mFileSize == 0 ) {
 536                                 $warning .= '<li>'.wfMsgHtml( 'emptyfile' ).'</li>';
 537                         }
 538
 539                         if ( !$this->mDestWarningAck ) {
 540                                 $warning .= self::getExistsWarning( $this->mLocalFile );
 541                         }
 542
 543                         $warning .= $this->getDupeWarning( $this->mTempPath, $finalExt );
 544
 545                         if( $warning != '' ) {
 546                                 /**
 547                                  * Stash the file in a temporary location; the user can choose
 548                                  * to let it through and we'll complete the upload then.
 549                                  */
 550                                 $resultDetails = array( 'warning' => $warning );
 551                                 return self::UPLOAD_WARNING;
 552                         }
 553                 }
 554
 555                 /**
 556                  * Try actually saving the thing...
 557                  * It will show an error form on failure.
 558                  */
 559                 $pageText = self::getInitialPageText( $this->mComment, $this->mLicense,
 560                         $this->mCopyrightStatus, $this->mCopyrightSource );
 561
 562                 $status = $this->mLocalFile->upload( $this->mTempPath, $this->mComment, $pageText,
 563                         File::DELETE_SOURCE, $this->mFileProps );
 564                 if ( !$status->isGood() ) {
 565                         $resultDetails = array( 'internal' => $status->getWikiText() );
 566                         return self::INTERNAL_ERROR;
 567                 } else {
 568                         if ( $this->mWatchthis ) {
 569                                 global $wgUser;
 570                                 $wgUser->addWatch( $this->mLocalFile->getTitle() );
 571                         }
 572                         // Success, redirect to description page
 573                         $img = null; // @todo: added to avoid passing a ref to null - should this be defined somewhere?
 574                         wfRunHooks( 'UploadComplete', array( &$this ) );
 575                         return self::SUCCESS;
 576                 }
 577         }
 578
 579         /**
 580          * Do existence checks on a file and produce a warning
 581          * This check is static and can be done pre-upload via AJAX
 582          * Returns an HTML fragment consisting of one or more LI elements if there is a warning
 583          * Returns an empty string if there is no warning
 584          */
 585         static function getExistsWarning( $file ) {
 586                 global $wgUser, $wgContLang;
 587                 // Check for uppercase extension. We allow these filenames but check if an image
 588                 // with lowercase extension exists already
 589                 $warning = '';
 590                 $align = $wgContLang->isRtl() ? 'left' : 'right';
 591
 592                 if( strpos( $file->getName(), '.' ) == false ) {
 593                         $partname = $file->getName();
 594                         $rawExtension = '';
 595                 } else {
 596                         $n = strrpos( $file->getName(), '.' );
 597                         $rawExtension = substr( $file->getName(), $n + 1 );
 598                         $partname = substr( $file->getName(), 0, $n );
 599                 }
 600
 601                 $sk = $wgUser->getSkin();
 602
 603                 if ( $rawExtension != $file->getExtension() ) {
 604                         // We're not using the normalized form of the extension.
 605                         // Normal form is lowercase, using most common of alternate
 606                         // extensions (eg 'jpg' rather than 'JPEG').
 607                         //
 608                         // Check for another file using the normalized form...
 609                         $nt_lc = Title::makeTitle( NS_FILE, $partname . '.' . $file->getExtension() );
 610                         $file_lc = wfLocalFile( $nt_lc );
 611                 } else {
 612                         $file_lc = false;
 613                 }
 614
 615                 if( $file->exists() ) {
 616                         $dlink = $sk->makeKnownLinkObj( $file->getTitle() );
 617                         if ( $file->allowInlineDisplay() ) {
 618                                 $dlink2 = $sk->makeImageLinkObj( $file->getTitle(), wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 619                                         $file->getName(), $align, array(), false, true );
 620                         } elseif ( !$file->allowInlineDisplay() && $file->isSafeFile() ) {
 621                                 $icon = $file->iconThumb();
 622                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 623                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 624                         } else {
 625                                 $dlink2 = '';
 626                         }
 627
 628                         $warning .= '<li>' . wfMsgExt( 'fileexists', array('parseinline','replaceafter'), $dlink ) . '</li>' . $dlink2;
 629
 630                 } elseif( $file->getTitle()->getArticleID() ) {
 631                         $lnk = $sk->makeKnownLinkObj( $file->getTitle(), '', 'redirect=no' );
 632                         $warning .= '<li>' . wfMsgExt( 'filepageexists', array( 'parseinline', 'replaceafter' ), $lnk ) . '</li>';
 633                 } elseif ( $file_lc && $file_lc->exists() ) {
 634                         # Check if image with lowercase extension exists.
 635                         # It's not forbidden but in 99% it makes no sense to upload the same filename with uppercase extension
 636                         $dlink = $sk->makeKnownLinkObj( $nt_lc );
 637                         if ( $file_lc->allowInlineDisplay() ) {
 638                                 $dlink2 = $sk->makeImageLinkObj( $nt_lc, wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 639                                         $nt_lc->getText(), $align, array(), false, true );
 640                         } elseif ( !$file_lc->allowInlineDisplay() && $file_lc->isSafeFile() ) {
 641                                 $icon = $file_lc->iconThumb();
 642                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 643                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 644                         } else {
 645                                 $dlink2 = '';
 646                         }
 647
 648                         $warning .= '<li>' .
 649                                 wfMsgExt( 'fileexists-extension', 'parsemag',
 650                                         $file->getTitle()->getPrefixedText(), $dlink ) .
 651                                 '</li>' . $dlink2;
 652
 653                 } elseif ( ( substr( $partname , 3, 3 ) == 'px-' || substr( $partname , 2, 3 ) == 'px-' )
 654                         && ereg( "[0-9]{2}" , substr( $partname , 0, 2) ) )
 655                 {
 656                         # Check for filenames like 50px- or 180px-, these are mostly thumbnails
 657                         $nt_thb = Title::newFromText( substr( $partname , strpos( $partname , '-' ) +1 ) . '.' . $rawExtension );
 658                         $file_thb = wfLocalFile( $nt_thb );
 659                         if ($file_thb->exists() ) {
 660                                 # Check if an image without leading '180px-' (or similiar) exists
 661                                 $dlink = $sk->makeKnownLinkObj( $nt_thb);
 662                                 if ( $file_thb->allowInlineDisplay() ) {
 663                                         $dlink2 = $sk->makeImageLinkObj( $nt_thb,
 664                                                 wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 665                                                 $nt_thb->getText(), $align, array(), false, true );
 666                                 } elseif ( !$file_thb->allowInlineDisplay() && $file_thb->isSafeFile() ) {
 667                                         $icon = $file_thb->iconThumb();
 668                                         $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 669                                                 $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' .
 670                                                 $dlink . '</div>';
 671                                 } else {
 672                                         $dlink2 = '';
 673                                 }
 674
 675                                 $warning .= '<li>' . wfMsgExt( 'fileexists-thumbnail-yes', 'parsemag', $dlink ) .
 676                                         '</li>' . $dlink2;
 677                         } else {
 678                                 # Image w/o '180px-' does not exists, but we do not like these filenames
 679                                 $warning .= '<li>' . wfMsgExt( 'file-thumbnail-no', 'parseinline' ,
 680                                         substr( $partname , 0, strpos( $partname , '-' ) +1 ) ) . '</li>';
 681                         }
 682                 }
 683
 684                 $filenamePrefixBlacklist = self::getFilenamePrefixBlacklist();
 685                 # Do the match
 686                 foreach( $filenamePrefixBlacklist as $prefix ) {
 687                         if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
 688                                 $warning .= '<li>' . wfMsgExt( 'filename-bad-prefix', 'parseinline', $prefix ) . '</li>';
 689                                 break;
 690                         }
 691                 }
 692
 693                 if ( $file->wasDeleted() && !$file->exists() ) {
 694                         # If the file existed before and was deleted, warn the user of this
 695                         # Don't bother doing so if the file exists now, however
 696                         $ltitle = SpecialPage::getTitleFor( 'Log' );
 697                         $llink = $sk->makeKnownLinkObj( $ltitle, wfMsgHtml( 'deletionlog' ),
 698                                 'type=delete&page=' . $file->getTitle()->getPrefixedUrl() );
 699                         $warning .= '<li>' . wfMsgWikiHtml( 'filewasdeleted', $llink ) . '</li>';
 700                 }
 701                 return $warning;
 702         }
 703
 704         /**
 705          * Get a list of warnings
 706          *
 707          * @param string local filename, e.g. 'file exists', 'non-descriptive filename'
 708          * @return array list of warning messages
 709          */
 710         static function ajaxGetExistsWarning( $filename ) {
 711                 $file = wfFindFile( $filename );
 712                 if( !$file ) {
 713                         // Force local file so we have an object to do further checks against
 714                         // if there isn't an exact match...
 715                         $file = wfLocalFile( $filename );
 716                 }
 717                 $s = '&nbsp;';
 718                 if ( $file ) {
 719                         $warning = self::getExistsWarning( $file );
 720                         if ( $warning !== '' ) {
 721                                 $s = "<ul>$warning</ul>";
 722                         }
 723                 }
 724                 return $s;
 725         }
 726
 727         /**
 728          * Render a preview of a given license for the AJAX preview on upload
 729          *
 730          * @param string $license
 731          * @return string
 732          */
 733         public static function ajaxGetLicensePreview( $license ) {
 734                 global $wgParser, $wgUser;
 735                 $text = '{{' . $license . '}}';
 736                 $title = Title::makeTitle( NS_FILE, 'Sample.jpg' );
 737                 $options = ParserOptions::newFromUser( $wgUser );
 738
 739                 // Expand subst: first, then live templates...
 740                 $text = $wgParser->preSaveTransform( $text, $title, $wgUser, $options );
 741                 $output = $wgParser->parse( $text, $title, $options );
 742
 743                 return $output->getText();
 744         }
 745
 746         /**
 747          * Check for duplicate files and throw up a warning before the upload
 748          * completes.
 749          */
 750         function getDupeWarning( $tempfile, $extension ) {
 751                 $hash = File::sha1Base36( $tempfile );
 752                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 753                 $archivedImage = new ArchivedFile( null, 0, $hash.".$extension" );
 754                 if( $dupes ) {
 755                         global $wgOut;
 756                         $msg = "<gallery>";
 757                         foreach( $dupes as $file ) {
 758                                 $title = $file->getTitle();
 759                                 $msg .= $title->getPrefixedText() .
 760                                         "|" . $title->getText() . "\n";
 761                         }
 762                         $msg .= "</gallery>";
 763                         return "<li>" .
 764                                 wfMsgExt( "file-exists-duplicate", array( "parse" ), count( $dupes ) ) .
 765                                 $wgOut->parse( $msg ) .
 766                                 "</li>\n";
 767                 } elseif ( $archivedImage->getID() > 0 ) {
 768                         global $wgOut;
 769                         $name = Title::makeTitle( NS_FILE, $archivedImage->getName() )->getPrefixedText();
 770                         return Xml::tags( 'li', null, wfMsgExt( 'file-deleted-duplicate', array( 'parseinline' ), array( $name ) ) );
 771                 } else {
 772                         return '';
 773                 }
 774         }
 775
 776         /**
 777          * Get a list of blacklisted filename prefixes from [[MediaWiki:filename-prefix-blacklist]]
 778          *
 779          * @return array list of prefixes
 780          */
 781         public static function getFilenamePrefixBlacklist() {
 782                 $blacklist = array();
 783                 $message = wfMsgForContent( 'filename-prefix-blacklist' );
 784                 if( $message && !( wfEmptyMsg( 'filename-prefix-blacklist', $message ) || $message == '-' ) ) {
 785                         $lines = explode( "\n", $message );
 786                         foreach( $lines as $line ) {
 787                                 // Remove comment lines
 788                                 $comment = substr( trim( $line ), 0, 1 );
 789                                 if ( $comment == '#' || $comment == '' ) {
 790                                         continue;
 791                                 }
 792                                 // Remove additional comments after a prefix
 793                                 $comment = strpos( $line, '#' );
 794                                 if ( $comment > 0 ) {
 795                                         $line = substr( $line, 0, $comment-1 );
 796                                 }
 797                                 $blacklist[] = trim( $line );
 798                         }
 799                 }
 800                 return $blacklist;
 801         }
 802
 803         /**
 804          * Stash a file in a temporary directory for later processing
 805          * after the user has confirmed it.
 806          *
 807          * If the user doesn't explicitly cancel or accept, these files
 808          * can accumulate in the temp directory.
 809          *
 810          * @param string $saveName - the destination filename
 811          * @param string $tempName - the source temporary file to save
 812          * @return string - full path the stashed file, or false on failure
 813          * @access private
 814          */
 815         function saveTempUploadedFile( $saveName, $tempName ) {
 816                 global $wgOut;
 817                 $repo = RepoGroup::singleton()->getLocalRepo();
 818                 $status = $repo->storeTemp( $saveName, $tempName );
 819                 if ( !$status->isGood() ) {
 820                         $this->showError( $status->getWikiText() );
 821                         return false;
 822                 } else {
 823                         return $status->value;
 824                 }
 825         }
 826
 827         /**
 828          * Stash a file in a temporary directory for later processing,
 829          * and save the necessary descriptive info into the session.
 830          * Returns a key value which will be passed through a form
 831          * to pick up the path info on a later invocation.
 832          *
 833          * @return int
 834          * @access private
 835          */
 836         function stashSession() {
 837                 $stash = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath );
 838
 839                 if( !$stash ) {
 840                         # Couldn't save the file.
 841                         return false;
 842                 }
 843
 844                 $key = mt_rand( 0, 0x7fffffff );
 845                 $_SESSION['wsUploadData'][$key] = array(
 846                         'mTempPath'       => $stash,
 847                         'mFileSize'       => $this->mFileSize,
 848                         'mSrcName'        => $this->mSrcName,
 849                         'mFileProps'      => $this->mFileProps,
 850                         'version'         => self::SESSION_VERSION,
 851                 );
 852                 return $key;
 853         }
 854
 855         /**
 856          * Remove a temporarily kept file stashed by saveTempUploadedFile().
 857          * @access private
 858          * @return success
 859          */
 860         function unsaveUploadedFile() {
 861                 global $wgOut;
 862                 $repo = RepoGroup::singleton()->getLocalRepo();
 863                 $success = $repo->freeTemp( $this->mTempPath );
 864                 if ( ! $success ) {
 865                         $wgOut->showFileDeleteError( $this->mTempPath );
 866                         return false;
 867                 } else {
 868                         return true;
 869                 }
 870         }
 871
 872         /* -------------------------------------------------------------- */
 873
 874         /**
 875          * @param string $error as HTML
 876          * @access private
 877          */
 878         function uploadError( $error ) {
 879                 global $wgOut;
 880                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 881                 $wgOut->addHTML( '<span class="error">' . $error . '</span>' );
 882         }
 883
 884         /**
 885          * There's something wrong with this file, not enough to reject it
 886          * totally but we require manual intervention to save it for real.
 887          * Stash it away, then present a form asking to confirm or cancel.
 888          *
 889          * @param string $warning as HTML
 890          * @access private
 891          */
 892         function uploadWarning( $warning ) {
 893                 global $wgOut;
 894                 global $wgUseCopyrightUpload;
 895
 896                 $this->mSessionKey = $this->stashSession();
 897                 if( !$this->mSessionKey ) {
 898                         # Couldn't save file; an error has been displayed so let's go.
 899                         return;
 900                 }
 901
 902                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 903                 $wgOut->addHTML( '<ul class="warning">' . $warning . "</ul>\n" );
 904
 905                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
 906
 907                 if ( $wgUseCopyrightUpload ) {
 908                         $copyright = Xml::hidden( 'wpUploadCopyStatus', $this->mCopyrightStatus ) . "\n" .
 909                                         Xml::hidden( 'wpUploadSource', $this->mCopyrightSource ) . "\n";
 910                 } else {
 911                         $copyright = '';
 912                 }
 913
 914                 $wgOut->addHTML(
 915                         Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL( 'action=submit' ),
 916                                  'enctype' => 'multipart/form-data', 'id' => 'uploadwarning' ) ) . "\n" .
 917                         Xml::hidden( 'wpIgnoreWarning', '1' ) . "\n" .
 918                         Xml::hidden( 'wpSessionKey', $this->mSessionKey ) . "\n" .
 919                         Xml::hidden( 'wpUploadDescription', $this->mComment ) . "\n" .
 920                         Xml::hidden( 'wpLicense', $this->mLicense ) . "\n" .
 921                         Xml::hidden( 'wpDestFile', $this->mDesiredDestName ) . "\n" .
 922                         Xml::hidden( 'wpWatchthis', $this->mWatchthis ) . "\n" .
 923                         "{$copyright}<br />" .
 924                         Xml::submitButton( wfMsg( 'ignorewarning' ), array ( 'name' => 'wpUpload', 'id' => 'wpUpload', 'checked' => 'checked' ) ) . ' ' .
 925                         Xml::submitButton( wfMsg( 'reuploaddesc' ), array ( 'name' => 'wpReUpload', 'id' => 'wpReUpload' ) ) .
 926                         Xml::closeElement( 'form' ) . "\n"
 927                 );
 928         }
 929
 930         /**
 931          * Displays the main upload form, optionally with a highlighted
 932          * error message up at the top.
 933          *
 934          * @param string $msg as HTML
 935          * @access private
 936          */
 937         function mainUploadForm( $msg='' ) {
 938                 global $wgOut, $wgUser, $wgLang, $wgMaxUploadSize;
 939                 global $wgUseCopyrightUpload, $wgUseAjax, $wgAjaxUploadDestCheck, $wgAjaxLicensePreview;
 940                 global $wgRequest, $wgAllowCopyUploads;
 941                 global $wgStylePath, $wgStyleVersion;
 942
 943                 $useAjaxDestCheck = $wgUseAjax && $wgAjaxUploadDestCheck;
 944                 $useAjaxLicensePreview = $wgUseAjax && $wgAjaxLicensePreview;
 945
 946                 $adc = wfBoolToStr( $useAjaxDestCheck );
 947                 $alp = wfBoolToStr( $useAjaxLicensePreview );
 948                 $autofill = wfBoolToStr( $this->mDesiredDestName == '' );
 949
 950                 $wgOut->addScript( "<script type=\"text/javascript\">
 951 wgAjaxUploadDestCheck = {$adc};
 952 wgAjaxLicensePreview = {$alp};
 953 wgUploadAutoFill = {$autofill};
 954 </script>" );
 955                 $wgOut->addScriptFile( 'upload.js' );
 956                 $wgOut->addScriptFile( 'edit.js' ); // For <charinsert> support
 957
 958                 if( !wfRunHooks( 'UploadForm:initial', array( &$this ) ) )
 959                 {
 960                         wfDebug( "Hook 'UploadForm:initial' broke output of the upload form\n" );
 961                         return false;
 962                 }
 963
 964                 if( $this->mDesiredDestName ) {
 965                         $title = Title::makeTitleSafe( NS_FILE, $this->mDesiredDestName );
 966                         // Show a subtitle link to deleted revisions (to sysops et al only)
 967                         if( $title instanceof Title && ( $count = $title->isDeleted() ) > 0 && $wgUser->isAllowed( 'deletedhistory' ) ) {
 968                                 $link = wfMsgExt(
 969                                         $wgUser->isAllowed( 'delete' ) ? 'thisisdeleted' : 'viewdeleted',
 970                                         array( 'parse', 'replaceafter' ),
 971                                         $wgUser->getSkin()->makeKnownLinkObj(
 972                                                 SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedText() ),
 973                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $count )
 974                                         )
 975                                 );
 976                                 $wgOut->addHTML( "<div id=\"contentSub2\">{$link}</div>" );
 977                         }
 978
 979                         // Show the relevant lines from deletion log (for still deleted files only)
 980                         if( $title instanceof Title && $title->isDeleted() > 0 && !$title->exists() ) {
 981                                 $this->showDeletionLog( $wgOut, $title->getPrefixedText() );
 982                         }
 983                 }
 984
 985                 $cols = intval($wgUser->getOption( 'cols' ));
 986
 987                 if( $wgUser->getOption( 'editwidth' ) ) {
 988                         $width = " style=\"width:100%\"";
 989                 } else {
 990                         $width = '';
 991                 }
 992
 993                 if ( '' != $msg ) {
 994                         $sub = wfMsgHtml( 'uploaderror' );
 995                         $wgOut->addHTML( "<h2>{$sub}</h2>\n" .
 996                           "<span class='error'>{$msg}</span>\n" );
 997                 }
 998
 999                 $uploadMsg = $wgRequest->getVal( 'uploadmsg' );
1000                 if( $uploadMsg ) {
1001                         $uploadMsgName = 'uploadtext-' . $uploadMsg;
1002                         // Fall back to normal message if the custom messages is empty
1003                         if( wfEmptyMsg( $uploadMsgName, wfMsg( $uploadMsgName ) ) )
1004                                 $uploadMsgName = 'uploadtext';
1005                 } else {
1006                         $uploadMsgName = 'uploadtext';
1007                 }
1008
1009                 $wgOut->addHTML( '<div id="uploadtext">' );
1010                 $wgOut->addWikiMsg( $uploadMsgName, $this->mDesiredDestName );
1011                 $wgOut->addHTML( "</div>\n" );
1012
1013                 # Print a list of allowed file extensions, if so configured.  We ignore
1014                 # MIME type here, it's incomprehensible to most people and too long.
1015                 global $wgCheckFileExtensions, $wgStrictFileExtensions,
1016                 $wgFileExtensions, $wgFileBlacklist;
1017
1018                 $allowedExtensions = '';
1019                 if( $wgCheckFileExtensions ) {
1020                         if( $wgStrictFileExtensions ) {
1021                                 # Everything not permitted is banned
1022                                 $extensionsList =
1023                                         '<div id="mw-upload-permitted">' .
1024                                         wfMsgWikiHtml( 'upload-permitted', $wgLang->commaList( $wgFileExtensions ) ) .
1025                                         "</div>\n";
1026                         } else {
1027                                 # We have to list both preferred and prohibited
1028                                 $extensionsList =
1029                                         '<div id="mw-upload-preferred">' .
1030                                         wfMsgWikiHtml( 'upload-preferred', $wgLang->commaList( $wgFileExtensions ) ) .
1031                                         "</div>\n" .
1032                                         '<div id="mw-upload-prohibited">' .
1033                                         wfMsgWikiHtml( 'upload-prohibited', $wgLang->commaList( $wgFileBlacklist ) ) .
1034                                         "</div>\n";
1035                         }
1036                 } else {
1037                         # Everything is permitted.
1038                         $extensionsList = '';
1039                 }
1040
1041                 # Get the maximum file size from php.ini as $wgMaxUploadSize works for uploads from URL via CURL only
1042                 # See http://www.php.net/manual/en/ini.core.php#ini.upload-max-filesize for possible values of upload_max_filesize
1043                 $val = trim( ini_get( 'upload_max_filesize' ) );
1044                 $last = strtoupper( ( substr( $val, -1 ) ) );
1045                 switch( $last ) {
1046                         case 'G':
1047                                 $val2 = substr( $val, 0, -1 ) * 1024 * 1024 * 1024;
1048                                 break;
1049                         case 'M':
1050                                 $val2 = substr( $val, 0, -1 ) * 1024 * 1024;
1051                                 break;
1052                         case 'K':
1053                                 $val2 = substr( $val, 0, -1 ) * 1024;
1054                                 break;
1055                         default:
1056                                 $val2 = $val;
1057                 }
1058                 $val2 = $wgAllowCopyUploads ? min( $wgMaxUploadSize, $val2 ) : $val2;
1059                 $maxUploadSize = '<div id="mw-upload-maxfilesize">' .
1060                         wfMsgExt( 'upload-maxfilesize', array( 'parseinline', 'escapenoentities' ),
1061                                 $wgLang->formatSize( $val2 ) ) .
1062                                 "</div>\n";
1063
1064                 $sourcefilename = wfMsgExt( 'sourcefilename', array( 'parseinline', 'escapenoentities' ) );
1065         $destfilename = wfMsgExt( 'destfilename', array( 'parseinline', 'escapenoentities' ) );
1066
1067                 $summary = wfMsgExt( 'fileuploadsummary', 'parseinline' );
1068
1069                 $licenses = new Licenses();
1070                 $license = wfMsgExt( 'license', array( 'parseinline' ) );
1071                 $nolicense = wfMsgHtml( 'nolicense' );
1072                 $licenseshtml = $licenses->getHtml();
1073
1074                 $ulb = wfMsgHtml( 'uploadbtn' );
1075
1076
1077                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
1078
1079                 $encDestName = htmlspecialchars( $this->mDesiredDestName );
1080
1081                 $watchChecked = $this->watchCheck()
1082                         ? 'checked="checked"'
1083                         : '';
1084                 $warningChecked = $this->mIgnoreWarning ? 'checked' : '';
1085
1086                 // Prepare form for upload or upload/copy
1087                 if( $wgAllowCopyUploads && $wgUser->isAllowed( 'upload_by_url' ) ) {
1088                         $filename_form =
1089                                 "<input type='radio' id='wpSourceTypeFile' name='wpSourceType' value='file' " .
1090                                    "onchange='toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\")' checked='checked' />" .
1091                                  "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1092                                    "onfocus='" .
1093                                      "toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\");" .
1094                                      "toggle_element_check(\"wpSourceTypeFile\",\"wpSourceTypeURL\")' " .
1095                                      "onchange='fillDestFilename(\"wpUploadFile\")' size='60' />" .
1096                                 wfMsgHTML( 'upload_source_file' ) . "<br/>" .
1097                                 "<input type='radio' id='wpSourceTypeURL' name='wpSourceType' value='web' " .
1098                                   "onchange='toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\")' />" .
1099                                 "<input tabindex='1' type='text' name='wpUploadFileURL' id='wpUploadFileURL' " .
1100                                   "onfocus='" .
1101                                     "toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\");" .
1102                                     "toggle_element_check(\"wpSourceTypeURL\",\"wpSourceTypeFile\")' " .
1103                                     "onchange='fillDestFilename(\"wpUploadFileURL\")' size='60' disabled='disabled' />" .
1104                                 wfMsgHtml( 'upload_source_url' ) ;
1105                 } else {
1106                         $filename_form =
1107                                 "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1108                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") .
1109                                 "size='60' />" .
1110                                 "<input type='hidden' name='wpSourceType' value='file' />" ;
1111                 }
1112                 if ( $useAjaxDestCheck ) {
1113                         $warningRow = "<tr><td colspan='2' id='wpDestFile-warning'>&nbsp;</td></tr>";
1114                         $destOnkeyup = 'onkeyup="wgUploadWarningObj.keypress();"';
1115                 } else {
1116                         $warningRow = '';
1117                         $destOnkeyup = '';
1118                 }
1119
1120                 $encComment = htmlspecialchars( $this->mComment );
1121
1122                 $wgOut->addHTML(
1123                          Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL(),
1124                                  'enctype' => 'multipart/form-data', 'id' => 'mw-upload-form' ) ) .
1125                          Xml::openElement( 'fieldset' ) .
1126                          Xml::element( 'legend', null, wfMsg( 'upload' ) ) .
1127                          Xml::openElement( 'table', array( 'border' => '0', 'id' => 'mw-upload-table' ) ) .
1128                          "<tr>
1129                                 {$this->uploadFormTextTop}
1130                                 <td class='mw-label'>
1131                                         <label for='wpUploadFile'>{$sourcefilename}</label>
1132                                 </td>
1133                                 <td class='mw-input'>
1134                                         {$filename_form}
1135                                 </td>
1136                         </tr>
1137                         <tr>
1138                                 <td></td>
1139                                 <td>
1140                                         {$maxUploadSize}
1141                                         {$extensionsList}
1142                                 </td>
1143                         </tr>
1144                         <tr>
1145                                 <td class='mw-label'>
1146                                         <label for='wpDestFile'>{$destfilename}</label>
1147                                 </td>
1148                                 <td class='mw-input'>
1149                                         <input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='60'
1150                                                 value=\"{$encDestName}\" onchange='toggleFilenameFiller()' $destOnkeyup />
1151                                 </td>
1152                         </tr>
1153                         <tr>
1154                                 <td class='mw-label'>
1155                                         <label for='wpUploadDescription'>{$summary}</label>
1156                                 </td>
1157                                 <td class='mw-input'>
1158                                         <textarea tabindex='3' name='wpUploadDescription' id='wpUploadDescription' rows='6'
1159                                                 cols='{$cols}'{$width}>$encComment</textarea>
1160                                         {$this->uploadFormTextAfterSummary}
1161                                 </td>
1162                         </tr>
1163                         <tr>"
1164                 );
1165
1166                 if ( $licenseshtml != '' ) {
1167                         global $wgStylePath;
1168                         $wgOut->addHTML( "
1169                                         <td class='mw-label'>
1170                                                 <label for='wpLicense'>$license</label>
1171                                         </td>
1172                                         <td class='mw-input'>
1173                                                 <select name='wpLicense' id='wpLicense' tabindex='4'
1174                                                         onchange='licenseSelectorCheck()'>
1175                                                         <option value=''>$nolicense</option>
1176                                                         $licenseshtml
1177                                                 </select>
1178                                         </td>
1179                                 </tr>
1180                                 <tr>"
1181                         );
1182                         if( $useAjaxLicensePreview ) {
1183                                 $wgOut->addHTML( "
1184                                                 <td></td>
1185                                                 <td id=\"mw-license-preview\"></td>
1186                                         </tr>
1187                                         <tr>"
1188                                 );
1189                         }
1190                 }
1191
1192                 if ( $wgUseCopyrightUpload ) {
1193                         $filestatus = wfMsgExt( 'filestatus', 'escapenoentities' );
1194                         $copystatus =  htmlspecialchars( $this->mCopyrightStatus );
1195                         $filesource = wfMsgExt( 'filesource', 'escapenoentities' );
1196                         $uploadsource = htmlspecialchars( $this->mCopyrightSource );
1197
1198                         $wgOut->addHTML( "
1199                                         <td class='mw-label' style='white-space: nowrap;'>
1200                                                 <label for='wpUploadCopyStatus'>$filestatus</label></td>
1201                                         <td class='mw-input'>
1202                                                 <input tabindex='5' type='text' name='wpUploadCopyStatus' id='wpUploadCopyStatus'
1203                                                         value=\"$copystatus\" size='60' />
1204                                         </td>
1205                                 </tr>
1206                                 <tr>
1207                                         <td class='mw-label'>
1208                                                 <label for='wpUploadCopyStatus'>$filesource</label>
1209                                         </td>
1210                                         <td class='mw-input'>
1211                                                 <input tabindex='6' type='text' name='wpUploadSource' id='wpUploadCopyStatus'
1212                                                         value=\"$uploadsource\" size='60' />
1213                                         </td>
1214                                 </tr>
1215                                 <tr>"
1216                         );
1217                 }
1218
1219                 $wgOut->addHTML( "
1220                                 <td></td>
1221                                 <td>
1222                                         <input tabindex='7' type='checkbox' name='wpWatchthis' id='wpWatchthis' $watchChecked value='true' />
1223                                         <label for='wpWatchthis'>" . wfMsgHtml( 'watchthisupload' ) . "</label>
1224                                         <input tabindex='8' type='checkbox' name='wpIgnoreWarning' id='wpIgnoreWarning' value='true' $warningChecked/>
1225                                         <label for='wpIgnoreWarning'>" . wfMsgHtml( 'ignorewarnings' ) . "</label>
1226                                 </td>
1227                         </tr>
1228                         $warningRow
1229                         <tr>
1230                                 <td></td>
1231                                         <td class='mw-input'>
1232                                                 <input tabindex='9' type='submit' name='wpUpload' value=\"{$ulb}\"" . $wgUser->getSkin()->tooltipAndAccesskey( 'upload' ) . " />
1233                                         </td>
1234                         </tr>
1235                         <tr>
1236                                 <td></td>
1237                                 <td class='mw-input'>"
1238                 );
1239                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1240                 $wgOut->addHTML( "
1241                                 </td>
1242                         </tr>" .
1243                         Xml::closeElement( 'table' ) .
1244                         Xml::hidden( 'wpDestFileWarningAck', '', array( 'id' => 'wpDestFileWarningAck' ) ) .
1245                         Xml::closeElement( 'fieldset' ) .
1246                         Xml::closeElement( 'form' )
1247                 );
1248                 $uploadfooter = wfMsgNoTrans( 'uploadfooter' );
1249                 if( $uploadfooter != '-' && !wfEmptyMsg( 'uploadfooter', $uploadfooter ) ){
1250                         $wgOut->addWikiText( '<div id="mw-upload-footer-message">' . $uploadfooter . '</div>' );
1251                 }
1252         }
1253
1254         /* -------------------------------------------------------------- */
1255
1256         /**
1257          * See if we should check the 'watch this page' checkbox on the form
1258          * based on the user's preferences and whether we're being asked
1259          * to create a new file or update an existing one.
1260          *
1261          * In the case where 'watch edits' is off but 'watch creations' is on,
1262          * we'll leave the box unchecked.
1263          *
1264          * Note that the page target can be changed *on the form*, so our check
1265          * state can get out of sync.
1266          */
1267         function watchCheck() {
1268                 global $wgUser;
1269                 if( $wgUser->getOption( 'watchdefault' ) ) {
1270                         // Watch all edits!
1271                         return true;
1272                 }
1273
1274                 $local = wfLocalFile( $this->mDesiredDestName );
1275                 if( $local && $local->exists() ) {
1276                         // We're uploading a new version of an existing file.
1277                         // No creation, so don't watch it if we're not already.
1278                         return $local->getTitle()->userIsWatching();
1279                 } else {
1280                         // New page should get watched if that's our option.
1281                         return $wgUser->getOption( 'watchcreations' );
1282                 }
1283         }
1284
1285         /**
1286          * Split a file into a base name and all dot-delimited 'extensions'
1287          * on the end. Some web server configurations will fall back to
1288          * earlier pseudo-'extensions' to determine type and execute
1289          * scripts, so the blacklist needs to check them all.
1290          *
1291          * @return array
1292          */
1293         public function splitExtensions( $filename ) {
1294                 $bits = explode( '.', $filename );
1295                 $basename = array_shift( $bits );
1296                 return array( $basename, $bits );
1297         }
1298
1299         /**
1300          * Perform case-insensitive match against a list of file extensions.
1301          * Returns true if the extension is in the list.
1302          *
1303          * @param string $ext
1304          * @param array $list
1305          * @return bool
1306          */
1307         function checkFileExtension( $ext, $list ) {
1308                 return in_array( strtolower( $ext ), $list );
1309         }
1310
1311         /**
1312          * Perform case-insensitive match against a list of file extensions.
1313          * Returns true if any of the extensions are in the list.
1314          *
1315          * @param array $ext
1316          * @param array $list
1317          * @return bool
1318          */
1319         public function checkFileExtensionList( $ext, $list ) {
1320                 foreach( $ext as $e ) {
1321                         if( in_array( strtolower( $e ), $list ) ) {
1322                                 return true;
1323                         }
1324                 }
1325                 return false;
1326         }
1327
1328         /**
1329          * Verifies that it's ok to include the uploaded file
1330          *
1331          * @param string $tmpfile the full path of the temporary file to verify
1332          * @param string $extension The filename extension that the file is to be served with
1333          * @return mixed true of the file is verified, a WikiError object otherwise.
1334          */
1335         function verify( $tmpfile, $extension ) {
1336                 #magically determine mime type
1337                 $magic = MimeMagic::singleton();
1338                 $mime = $magic->guessMimeType($tmpfile,false);
1339
1340
1341                 #check mime type, if desired
1342                 global $wgVerifyMimeType;
1343                 if ($wgVerifyMimeType) {
1344                         wfDebug ( "\n\nmime: <$mime> extension: <$extension>\n\n");
1345                         #check mime type against file extension
1346                         if( !self::verifyExtension( $mime, $extension ) ) {
1347                                 return new WikiErrorMsg( 'uploadcorrupt' );
1348                         }
1349
1350                         #check mime type blacklist
1351                         global $wgMimeTypeBlacklist;
1352                         if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist) ) {
1353                                 if ( $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
1354                                         return new WikiErrorMsg( 'filetype-badmime', htmlspecialchars( $mime ) );
1355                                 }
1356
1357                                 # Check IE type
1358                                 $fp = fopen( $tmpfile, 'rb' );
1359                                 $chunk = fread( $fp, 256 );
1360                                 fclose( $fp );
1361                                 $extMime = $magic->guessTypesForExtension( $extension );
1362                                 $ieTypes = $magic->getIEMimeTypes( $tmpfile, $chunk, $extMime );
1363                                 foreach ( $ieTypes as $ieType ) {
1364                                         if ( $this->checkFileExtension( $ieType, $wgMimeTypeBlacklist ) ) {
1365                                                 return new WikiErrorMsg( 'filetype-bad-ie-mime', $ieType );
1366                                         }
1367                                 }
1368                         }
1369                 }
1370
1371                 #check for htmlish code and javascript
1372                 if( $this->detectScript ( $tmpfile, $mime, $extension ) ) {
1373                         return new WikiErrorMsg( 'uploadscripted' );
1374                 }
1375                 if( $extension == 'svg' || $mime == 'image/svg+xml' ) {
1376                         if( $this->detectScriptInSvg( $tmpfile ) ) {
1377                                 return new WikiErrorMsg( 'uploadscripted' );
1378                         }
1379                 }
1380
1381                 /**
1382                 * Scan the uploaded file for viruses
1383                 */
1384                 $virus= $this->detectVirus($tmpfile);
1385                 if ( $virus ) {
1386                         return new WikiErrorMsg( 'uploadvirus', htmlspecialchars($virus) );
1387                 }
1388
1389                 wfDebug( __METHOD__.": all clear; passing.\n" );
1390                 return true;
1391         }
1392
1393         /**
1394          * Checks if the mime type of the uploaded file matches the file extension.
1395          *
1396          * @param string $mime the mime type of the uploaded file
1397          * @param string $extension The filename extension that the file is to be served with
1398          * @return bool
1399          */
1400         static function verifyExtension( $mime, $extension ) {
1401                 $magic = MimeMagic::singleton();
1402
1403                 if ( ! $mime || $mime == 'unknown' || $mime == 'unknown/unknown' )
1404                         if ( ! $magic->isRecognizableExtension( $extension ) ) {
1405                                 wfDebug( __METHOD__.": passing file with unknown detected mime type; " .
1406                                         "unrecognized extension '$extension', can't verify\n" );
1407                                 return true;
1408                         } else {
1409                                 wfDebug( __METHOD__.": rejecting file with unknown detected mime type; ".
1410                                         "recognized extension '$extension', so probably invalid file\n" );
1411                                 return false;
1412                         }
1413
1414                 $match= $magic->isMatchingExtension($extension,$mime);
1415
1416                 if ($match===NULL) {
1417                         wfDebug( __METHOD__.": no file extension known for mime type $mime, passing file\n" );
1418                         return true;
1419                 } elseif ($match===true) {
1420                         wfDebug( __METHOD__.": mime type $mime matches extension $extension, passing file\n" );
1421
1422                         #TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
1423                         return true;
1424
1425                 } else {
1426                         wfDebug( __METHOD__.": mime type $mime mismatches file extension $extension, rejecting file\n" );
1427                         return false;
1428                 }
1429         }
1430
1431
1432         /**
1433          * Heuristic for detecting files that *could* contain JavaScript instructions or
1434          * things that may look like HTML to a browser and are thus
1435          * potentially harmful. The present implementation will produce false positives in some situations.
1436          *
1437          * @param string $file Pathname to the temporary upload file
1438          * @param string $mime The mime type of the file
1439          * @param string $extension The extension of the file
1440          * @return bool true if the file contains something looking like embedded scripts
1441          */
1442         function detectScript($file, $mime, $extension) {
1443                 global $wgAllowTitlesInSVG;
1444
1445                 #ugly hack: for text files, always look at the entire file.
1446                 #For binarie field, just check the first K.
1447
1448                 if (strpos($mime,'text/')===0) $chunk = file_get_contents( $file );
1449                 else {
1450                         $fp = fopen( $file, 'rb' );
1451                         $chunk = fread( $fp, 1024 );
1452                         fclose( $fp );
1453                 }
1454
1455                 $chunk= strtolower( $chunk );
1456
1457                 if (!$chunk) return false;
1458
1459                 #decode from UTF-16 if needed (could be used for obfuscation).
1460                 if (substr($chunk,0,2)=="\xfe\xff") $enc= "UTF-16BE";
1461                 elseif (substr($chunk,0,2)=="\xff\xfe") $enc= "UTF-16LE";
1462                 else $enc= NULL;
1463
1464                 if ($enc) $chunk= iconv($enc,"ASCII//IGNORE",$chunk);
1465
1466                 $chunk= trim($chunk);
1467
1468                 #FIXME: convert from UTF-16 if necessarry!
1469
1470                 wfDebug("SpecialUpload::detectScript: checking for embedded scripts and HTML stuff\n");
1471
1472                 #check for HTML doctype
1473                 if (eregi("<!DOCTYPE *X?HTML",$chunk)) return true;
1474
1475                 /**
1476                 * Internet Explorer for Windows performs some really stupid file type
1477                 * autodetection which can cause it to interpret valid image files as HTML
1478                 * and potentially execute JavaScript, creating a cross-site scripting
1479                 * attack vectors.
1480                 *
1481                 * Apple's Safari browser also performs some unsafe file type autodetection
1482                 * which can cause legitimate files to be interpreted as HTML if the
1483                 * web server is not correctly configured to send the right content-type
1484                 * (or if you're really uploading plain text and octet streams!)
1485                 *
1486                 * Returns true if IE is likely to mistake the given file for HTML.
1487                 * Also returns true if Safari would mistake the given file for HTML
1488                 * when served with a generic content-type.
1489                 */
1490
1491                 $tags = array(
1492                         '<a href',
1493                         '<body',
1494                         '<head',
1495                         '<html',   #also in safari
1496                         '<img',
1497                         '<pre',
1498                         '<script', #also in safari
1499                         '<table'
1500                         );
1501                 if( ! $wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
1502                         $tags[] = '<title';
1503                 }
1504
1505                 foreach( $tags as $tag ) {
1506                         if( false !== strpos( $chunk, $tag ) ) {
1507                                 return true;
1508                         }
1509                 }
1510
1511                 /*
1512                 * look for javascript
1513                 */
1514
1515                 #resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1516                 $chunk = Sanitizer::decodeCharReferences( $chunk );
1517
1518                 #look for script-types
1519                 if (preg_match('!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim',$chunk)) return true;
1520
1521                 #look for html-style script-urls
1522                 if (preg_match('!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1523
1524                 #look for css-style script-urls
1525                 if (preg_match('!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1526
1527                 wfDebug("SpecialUpload::detectScript: no scripts found\n");
1528                 return false;
1529         }
1530
1531         function detectScriptInSvg( $filename ) {
1532                 $check = new XmlTypeCheck( $filename, array( $this, 'checkSvgScriptCallback' ) );
1533                 return $check->filterMatch;
1534         }
1535
1536         /**
1537          * @todo Replace this with a whitelist filter!
1538          */
1539         function checkSvgScriptCallback( $element, $attribs ) {
1540                 $stripped = $this->stripXmlNamespace( $element );
1541
1542                 if( $stripped == 'script' ) {
1543                         wfDebug( __METHOD__ . ": Found script element '$element' in uploaded file.\n" );
1544                         return true;
1545                 }
1546
1547                 foreach( $attribs as $attrib => $value ) {
1548                         $stripped = $this->stripXmlNamespace( $attrib );
1549                         if( substr( $stripped, 0, 2 ) == 'on' ) {
1550                                 wfDebug( __METHOD__ . ": Found script attribute '$attrib'='value' in uploaded file.\n" );
1551                                 return true;
1552                         }
1553                         if( $stripped == 'href' && strpos( strtolower( $value ), 'javascript:' ) !== false ) {
1554                                 wfDebug( __METHOD__ . ": Found script href attribute '$attrib'='$value' in uploaded file.\n" );
1555                                 return true;
1556                         }
1557                 }
1558         }
1559
1560         private function stripXmlNamespace( $name ) {
1561                 // 'http://www.w3.org/2000/svg:script' -> 'script'
1562                 $parts = explode( ':', strtolower( $name ) );
1563                 return array_pop( $parts );
1564         }
1565
1566         /**
1567          * Generic wrapper function for a virus scanner program.
1568          * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
1569          * $wgAntivirusRequired may be used to deny upload if the scan fails.
1570          *
1571          * @param string $file Pathname to the temporary upload file
1572          * @return mixed false if not virus is found, NULL if the scan fails or is disabled,
1573          *         or a string containing feedback from the virus scanner if a virus was found.
1574          *         If textual feedback is missing but a virus was found, this function returns true.
1575          */
1576         function detectVirus($file) {
1577                 global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
1578
1579                 if ( !$wgAntivirus ) {
1580                         wfDebug( __METHOD__.": virus scanner disabled\n");
1581                         return NULL;
1582                 }
1583
1584                 if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1585                         wfDebug( __METHOD__.": unknown virus scanner: $wgAntivirus\n" );
1586                         $wgOut->wrapWikiMsg( '<div class="error">$1</div>', array( 'virus-badscanner', $wgAntivirus ) );
1587                         return wfMsg('virus-unknownscanner') . " $wgAntivirus";
1588                 }
1589
1590                 # look up scanner configuration
1591                 $command = $wgAntivirusSetup[$wgAntivirus]["command"];
1592                 $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]["codemap"];
1593                 $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]["messagepattern"] ) ?
1594                         $wgAntivirusSetup[$wgAntivirus]["messagepattern"] : null;
1595
1596                 if ( strpos( $command,"%f" ) === false ) {
1597                         # simple pattern: append file to scan
1598                         $command .= " " . wfEscapeShellArg( $file );
1599                 } else {
1600                         # complex pattern: replace "%f" with file to scan
1601                         $command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
1602                 }
1603
1604                 wfDebug( __METHOD__.": running virus scan: $command \n" );
1605
1606                 # execute virus scanner
1607                 $exitCode = false;
1608
1609                 #NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1610                 #      that does not seem to be worth the pain.
1611                 #      Ask me (Duesentrieb) about it if it's ever needed.
1612                 $output = array();
1613                 if ( wfIsWindows() ) {
1614                         exec( "$command", $output, $exitCode );
1615                 } else {
1616                         exec( "$command 2>&1", $output, $exitCode );
1617                 }
1618
1619                 # map exit code to AV_xxx constants.
1620                 $mappedCode = $exitCode;
1621                 if ( $exitCodeMap ) {
1622                         if ( isset( $exitCodeMap[$exitCode] ) ) {
1623                                 $mappedCode = $exitCodeMap[$exitCode];
1624                         } elseif ( isset( $exitCodeMap["*"] ) ) {
1625                                 $mappedCode = $exitCodeMap["*"];
1626                         }
1627                 }
1628
1629                 if ( $mappedCode === AV_SCAN_FAILED ) {
1630                         # scan failed (code was mapped to false by $exitCodeMap)
1631                         wfDebug( __METHOD__.": failed to scan $file (code $exitCode).\n" );
1632
1633                         if ( $wgAntivirusRequired ) {
1634                                 return wfMsg('virus-scanfailed', array( $exitCode ) );
1635                         } else {
1636                                 return NULL;
1637                         }
1638                 } else if ( $mappedCode === AV_SCAN_ABORTED ) {
1639                         # scan failed because filetype is unknown (probably imune)
1640                         wfDebug( __METHOD__.": unsupported file type $file (code $exitCode).\n" );
1641                         return NULL;
1642                 } else if ( $mappedCode === AV_NO_VIRUS ) {
1643                         # no virus found
1644                         wfDebug( __METHOD__.": file passed virus scan.\n" );
1645                         return false;
1646                 } else {
1647                         $output = join( "\n", $output );
1648                         $output = trim( $output );
1649
1650                         if ( !$output ) {
1651                                 $output = true; #if there's no output, return true
1652                         } elseif ( $msgPattern ) {
1653                                 $groups = array();
1654                                 if ( preg_match( $msgPattern, $output, $groups ) ) {
1655                                         if ( $groups[1] ) {
1656                                                 $output = $groups[1];
1657                                         }
1658                                 }
1659                         }
1660
1661                         wfDebug( __METHOD__.": FOUND VIRUS! scanner feedback: $output \n" );
1662                         return $output;
1663                 }
1664         }
1665
1666         /**
1667          * Check if the temporary file is MacBinary-encoded, as some uploads
1668          * from Internet Explorer on Mac OS Classic and Mac OS X will be.
1669          * If so, the data fork will be extracted to a second temporary file,
1670          * which will then be checked for validity and either kept or discarded.
1671          *
1672          * @access private
1673          */
1674         function checkMacBinary() {
1675                 $macbin = new MacBinary( $this->mTempPath );
1676                 if( $macbin->isValid() ) {
1677                         $dataFile = tempnam( wfTempDir(), "WikiMacBinary" );
1678                         $dataHandle = fopen( $dataFile, 'wb' );
1679
1680                         wfDebug( "SpecialUpload::checkMacBinary: Extracting MacBinary data fork to $dataFile\n" );
1681                         $macbin->extractData( $dataHandle );
1682
1683                         $this->mTempPath = $dataFile;
1684                         $this->mFileSize = $macbin->dataForkLength();
1685
1686                         // We'll have to manually remove the new file if it's not kept.
1687                         $this->mRemoveTempFile = true;
1688                 }
1689                 $macbin->close();
1690         }
1691
1692         /**
1693          * If we've modified the upload file we need to manually remove it
1694          * on exit to clean up.
1695          * @access private
1696          */
1697         function cleanupTempFile() {
1698                 if ( $this->mRemoveTempFile && file_exists( $this->mTempPath ) ) {
1699                         wfDebug( "SpecialUpload::cleanupTempFile: Removing temporary file {$this->mTempPath}\n" );
1700                         unlink( $this->mTempPath );
1701                 }
1702         }
1703
1704         /**
1705          * Check if there's an overwrite conflict and, if so, if restrictions
1706          * forbid this user from performing the upload.
1707          *
1708          * @return mixed true on success, WikiError on failure
1709          * @access private
1710          */
1711         function checkOverwrite( $name ) {
1712                 $img = wfFindFile( $name );
1713
1714                 $error = '';
1715                 if( $img ) {
1716                         global $wgUser, $wgOut;
1717                         if( $img->isLocal() ) {
1718                                 if( !self::userCanReUpload( $wgUser, $img->name ) ) {
1719                                         $error = 'fileexists-forbidden';
1720                                 }
1721                         } else {
1722                                 if( !$wgUser->isAllowed( 'reupload' ) ||
1723                                     !$wgUser->isAllowed( 'reupload-shared' ) ) {
1724                                         $error = "fileexists-shared-forbidden";
1725                                 }
1726                         }
1727                 }
1728
1729                 if( $error ) {
1730                         $errorText = wfMsg( $error, wfEscapeWikiText( $img->getName() ) );
1731                         return $errorText;
1732                 }
1733
1734                 // Rockin', go ahead and upload
1735                 return true;
1736         }
1737
1738          /**
1739          * Check if a user is the last uploader
1740          *
1741          * @param User $user
1742          * @param string $img, image name
1743          * @return bool
1744          */
1745         public static function userCanReUpload( User $user, $img ) {
1746                 if( $user->isAllowed( 'reupload' ) )
1747                         return true; // non-conditional
1748                 if( !$user->isAllowed( 'reupload-own' ) )
1749                         return false;
1750
1751                 $dbr = wfGetDB( DB_SLAVE );
1752                 $row = $dbr->selectRow('image',
1753                 /* SELECT */ 'img_user',
1754                 /* WHERE */ array( 'img_name' => $img )
1755                 );
1756                 if ( !$row )
1757                         return false;
1758
1759                 return $user->getId() == $row->img_user;
1760         }
1761
1762         /**
1763          * Display an error with a wikitext description
1764          */
1765         function showError( $description ) {
1766                 global $wgOut;
1767                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
1768                 $wgOut->setRobotPolicy( "noindex,nofollow" );
1769                 $wgOut->setArticleRelated( false );
1770                 $wgOut->enableClientCache( false );
1771                 $wgOut->addWikiText( $description );
1772         }
1773
1774         /**
1775          * Get the initial image page text based on a comment and optional file status information
1776          */
1777         static function getInitialPageText( $comment, $license, $copyStatus, $source ) {
1778                 global $wgUseCopyrightUpload;
1779                 if ( $wgUseCopyrightUpload ) {
1780                         if ( $license != '' ) {
1781                                 $licensetxt = '== ' . wfMsgForContent( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1782                         }
1783                         $pageText = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n" .
1784                           '== ' . wfMsgForContent ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
1785                           "$licensetxt" .
1786                           '== ' . wfMsgForContent ( 'filesource' ) . " ==\n" . $source ;
1787                 } else {
1788                         if ( $license != '' ) {
1789                                 $filedesc = $comment == '' ? '' : '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n";
1790                                  $pageText = $filedesc .
1791                                          '== ' . wfMsgForContent ( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1792                         } else {
1793                                 $pageText = $comment;
1794                         }
1795                 }
1796                 return $pageText;
1797         }
1798
1799         /**
1800          * If there are rows in the deletion log for this file, show them,
1801          * along with a nice little note for the user
1802          *
1803          * @param OutputPage $out
1804          * @param string filename
1805          */
1806         private function showDeletionLog( $out, $filename ) {
1807                 global $wgUser;
1808                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
1809                 $pager = new LogPager( $loglist, 'delete', false, $filename );
1810                 if( $pager->getNumRows() > 0 ) {
1811                         $out->addHTML( '<div class="mw-warning-with-logexcerpt">' );
1812                         $out->addWikiMsg( 'upload-wasdeleted' );
1813                         $out->addHTML(
1814                                 $loglist->beginLogEventsList() .
1815                                 $pager->getBody() .
1816                                 $loglist->endLogEventsList()
1817                         );
1818                         $out->addHTML( '</div>' );
1819                 }
1820         }
1821 }