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 php's file_uploads setting
 232                 if( !wfIniGetBool( 'file_uploads' ) ) {
 233                         $wgOut->showErrorPage( 'uploaddisabled', 'php-uploaddisabledtext', array( $this->mDesiredDestName ) );
 234                         return;
 235                 }
 236
 237                 # Check uploading enabled
 238                 if( !$wgEnableUploads ) {
 239                         $wgOut->showErrorPage( 'uploaddisabled', 'uploaddisabledtext', array( $this->mDesiredDestName ) );
 240                         return;
 241                 }
 242
 243                 # Check permissions
 244                 if( !$wgUser->isAllowed( 'upload' ) ) {
 245                         if( !$wgUser->isLoggedIn() ) {
 246                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
 247                         } else {
 248                                 $wgOut->permissionRequired( 'upload' );
 249                         }
 250                         return;
 251                 }
 252
 253                 # Check blocks
 254                 if( $wgUser->isBlocked() ) {
 255                         $wgOut->blockedPage();
 256                         return;
 257                 }
 258
 259                 if( wfReadOnly() ) {
 260                         $wgOut->readOnlyPage();
 261                         return;
 262                 }
 263
 264                 if( $this->mReUpload ) {
 265                         if( !$this->unsaveUploadedFile() ) {
 266                                 return;
 267                         }
 268                         # Because it is probably checked and shouldn't be
 269                         $this->mIgnoreWarning = false;
 270
 271                         $this->mainUploadForm();
 272                 } else if( 'submit' == $this->mAction || $this->mUploadClicked ) {
 273                         $this->processUpload();
 274                 } else {
 275                         $this->mainUploadForm();
 276                 }
 277
 278                 $this->cleanupTempFile();
 279         }
 280
 281         /**
 282          * Do the upload
 283          * Checks are made in SpecialUpload::execute()
 284          *
 285          * @access private
 286          */
 287         function processUpload(){
 288                 global $wgUser, $wgOut, $wgFileExtensions, $wgLang;
 289                 $details = null;
 290                 $value = null;
 291                 $value = $this->internalProcessUpload( $details );
 292
 293                 switch($value) {
 294                         case self::SUCCESS:
 295                                 $wgOut->redirect( $this->mLocalFile->getTitle()->getFullURL() );
 296                                 break;
 297
 298                         case self::BEFORE_PROCESSING:
 299                                 break;
 300
 301                         case self::LARGE_FILE_SERVER:
 302                                 $this->mainUploadForm( wfMsgHtml( 'largefileserver' ) );
 303                                 break;
 304
 305                         case self::EMPTY_FILE:
 306                                 $this->mainUploadForm( wfMsgHtml( 'emptyfile' ) );
 307                                 break;
 308
 309                         case self::MIN_LENGTH_PARTNAME:
 310                                 $this->mainUploadForm( wfMsgHtml( 'minlength1' ) );
 311                                 break;
 312
 313                         case self::ILLEGAL_FILENAME:
 314                                 $filtered = $details['filtered'];
 315                                 $this->uploadError( wfMsgWikiHtml( 'illegalfilename', htmlspecialchars( $filtered ) ) );
 316                                 break;
 317
 318                         case self::PROTECTED_PAGE:
 319                                 $wgOut->showPermissionsErrorPage( $details['permissionserrors'] );
 320                                 break;
 321
 322                         case self::OVERWRITE_EXISTING_FILE:
 323                                 $errorText = $details['overwrite'];
 324                                 $this->uploadError( $wgOut->parse( $errorText ) );
 325                                 break;
 326
 327                         case self::FILETYPE_MISSING:
 328                                 $this->uploadError( wfMsgExt( 'filetype-missing', array ( 'parseinline' ) ) );
 329                                 break;
 330
 331                         case self::FILETYPE_BADTYPE:
 332                                 $finalExt = $details['finalExt'];
 333                                 $this->uploadError(
 334                                         wfMsgExt( 'filetype-banned-type',
 335                                                 array( 'parseinline' ),
 336                                                 htmlspecialchars( $finalExt ),
 337                                                 $wgLang->commaList( $wgFileExtensions ),
 338                                                 $wgLang->formatNum( count($wgFileExtensions) )
 339                                         )
 340                                 );
 341                                 break;
 342
 343                         case self::VERIFICATION_ERROR:
 344                                 $veri = $details['veri'];
 345                                 $this->uploadError( $veri->toString() );
 346                                 break;
 347
 348                         case self::UPLOAD_VERIFICATION_ERROR:
 349                                 $error = $details['error'];
 350                                 $this->uploadError( $error );
 351                                 break;
 352
 353                         case self::UPLOAD_WARNING:
 354                                 $warning = $details['warning'];
 355                                 $this->uploadWarning( $warning );
 356                                 break;
 357
 358                         case self::INTERNAL_ERROR:
 359                                 $internal = $details['internal'];
 360                                 $this->showError( $internal );
 361                                 break;
 362
 363                         default:
 364                                 throw new MWException( __METHOD__ . ": Unknown value `{$value}`" );
 365                 }
 366         }
 367
 368         /**
 369          * Really do the upload
 370          * Checks are made in SpecialUpload::execute()
 371          *
 372          * @param array $resultDetails contains result-specific dict of additional values
 373          *
 374          * @access private
 375          */
 376         function internalProcessUpload( &$resultDetails ) {
 377                 global $wgUser;
 378
 379                 if( !wfRunHooks( 'UploadForm:BeforeProcessing', array( &$this ) ) )
 380                 {
 381                         wfDebug( "Hook 'UploadForm:BeforeProcessing' broke processing the file.\n" );
 382                         return self::BEFORE_PROCESSING;
 383                 }
 384
 385                 /**
 386                  * If there was no filename or a zero size given, give up quick.
 387                  */
 388                 if( trim( $this->mSrcName ) == '' || empty( $this->mFileSize ) ) {
 389                         return self::EMPTY_FILE;
 390                 }
 391
 392                 /* Check for curl error */
 393                 if( $this->mCurlError ) {
 394                         return self::BEFORE_PROCESSING;
 395                 }
 396
 397                 /**
 398                  * Chop off any directories in the given filename. Then
 399                  * filter out illegal characters, and try to make a legible name
 400                  * out of it. We'll strip some silently that Title would die on.
 401                  */
 402                 if( $this->mDesiredDestName ) {
 403                         $basename = $this->mDesiredDestName;
 404                 } else {
 405                         $basename = $this->mSrcName;
 406                 }
 407                 $filtered = wfStripIllegalFilenameChars( $basename );
 408
 409                 /* Normalize to title form before we do any further processing */
 410                 $nt = Title::makeTitleSafe( NS_FILE, $filtered );
 411                 if( is_null( $nt ) ) {
 412                         $resultDetails = array( 'filtered' => $filtered );
 413                         return self::ILLEGAL_FILENAME;
 414                 }
 415                 $filtered = $nt->getDBkey();
 416
 417                 /**
 418                  * We'll want to blacklist against *any* 'extension', and use
 419                  * only the final one for the whitelist.
 420                  */
 421                 list( $partname, $ext ) = $this->splitExtensions( $filtered );
 422
 423                 if( count( $ext ) ) {
 424                         $finalExt = $ext[count( $ext ) - 1];
 425                 } else {
 426                         $finalExt = '';
 427                 }
 428
 429                 # If there was more than one "extension", reassemble the base
 430                 # filename to prevent bogus complaints about length
 431                 if( count( $ext ) > 1 ) {
 432                         for( $i = 0; $i < count( $ext ) - 1; $i++ )
 433                                 $partname .= '.' . $ext[$i];
 434                 }
 435
 436                 if( strlen( $partname ) < 1 ) {
 437                         return self::MIN_LENGTH_PARTNAME;
 438                 }
 439
 440                 $this->mLocalFile = wfLocalFile( $nt );
 441                 $this->mDestName = $this->mLocalFile->getName();
 442
 443                 /**
 444                  * If the image is protected, non-sysop users won't be able
 445                  * to modify it by uploading a new revision.
 446                  */
 447                 $permErrors = $nt->getUserPermissionsErrors( 'edit', $wgUser );
 448                 $permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $wgUser );
 449                 $permErrorsCreate = ( $nt->exists() ? array() : $nt->getUserPermissionsErrors( 'create', $wgUser ) );
 450
 451                 if( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
 452                         // merge all the problems into one list, avoiding duplicates
 453                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
 454                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );
 455                         $resultDetails = array( 'permissionserrors' => $permErrors );
 456                         return self::PROTECTED_PAGE;
 457                 }
 458
 459                 /**
 460                  * In some cases we may forbid overwriting of existing files.
 461                  */
 462                 $overwrite = $this->checkOverwrite( $this->mDestName );
 463                 if( $overwrite !== true ) {
 464                         $resultDetails = array( 'overwrite' => $overwrite );
 465                         return self::OVERWRITE_EXISTING_FILE;
 466                 }
 467
 468                 /* Don't allow users to override the blacklist (check file extension) */
 469                 global $wgCheckFileExtensions, $wgStrictFileExtensions;
 470                 global $wgFileExtensions, $wgFileBlacklist;
 471                 if ($finalExt == '') {
 472                         return self::FILETYPE_MISSING;
 473                 } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) ||
 474                                 ($wgCheckFileExtensions && $wgStrictFileExtensions &&
 475                                         !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) ) {
 476                         $resultDetails = array( 'finalExt' => $finalExt );
 477                         return self::FILETYPE_BADTYPE;
 478                 }
 479
 480                 /**
 481                  * Look at the contents of the file; if we can recognize the
 482                  * type but it's corrupt or data of the wrong type, we should
 483                  * probably not accept it.
 484                  */
 485                 if( !$this->mStashed ) {
 486                         $this->mFileProps = File::getPropsFromPath( $this->mTempPath, $finalExt );
 487                         $this->checkMacBinary();
 488                         $veri = $this->verify( $this->mTempPath, $finalExt );
 489
 490                         if( $veri !== true ) { //it's a wiki error...
 491                                 $resultDetails = array( 'veri' => $veri );
 492                                 return self::VERIFICATION_ERROR;
 493                         }
 494
 495                         /**
 496                          * Provide an opportunity for extensions to add further checks
 497                          */
 498                         $error = '';
 499                         if( !wfRunHooks( 'UploadVerification',
 500                                         array( $this->mDestName, $this->mTempPath, &$error ) ) ) {
 501                                 $resultDetails = array( 'error' => $error );
 502                                 return self::UPLOAD_VERIFICATION_ERROR;
 503                         }
 504                 }
 505
 506
 507                 /**
 508                  * Check for non-fatal conditions
 509                  */
 510                 if ( ! $this->mIgnoreWarning ) {
 511                         $warning = '';
 512
 513                         $comparableName = str_replace( ' ', '_', $basename );
 514                         global $wgCapitalLinks, $wgContLang;
 515                         if ( $wgCapitalLinks ) {
 516                                 $comparableName = $wgContLang->ucfirst( $comparableName );
 517                         }
 518
 519                         if( $comparableName !== $filtered ) {
 520                                 $warning .=  '<li>'.wfMsgHtml( 'badfilename', htmlspecialchars( $this->mDestName ) ).'</li>';
 521                         }
 522
 523                         global $wgCheckFileExtensions;
 524                         if ( $wgCheckFileExtensions ) {
 525                                 if ( !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) {
 526                                         global $wgLang;
 527                                         $warning .= '<li>' .
 528                                         wfMsgExt( 'filetype-unwanted-type',
 529                                                 array( 'parseinline' ),
 530                                                 htmlspecialchars( $finalExt ),
 531                                                 $wgLang->commaList( $wgFileExtensions ),
 532                                                 $wgLang->formatNum( count($wgFileExtensions) )
 533                                         ) . '</li>';
 534                                 }
 535                         }
 536
 537                         global $wgUploadSizeWarning;
 538                         if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) {
 539                                 $skin = $wgUser->getSkin();
 540                                 $wsize = $skin->formatSize( $wgUploadSizeWarning );
 541                                 $asize = $skin->formatSize( $this->mFileSize );
 542                                 $warning .= '<li>' . wfMsgHtml( 'large-file', $wsize, $asize ) . '</li>';
 543                         }
 544                         if ( $this->mFileSize == 0 ) {
 545                                 $warning .= '<li>'.wfMsgHtml( 'emptyfile' ).'</li>';
 546                         }
 547
 548                         if ( !$this->mDestWarningAck ) {
 549                                 $warning .= self::getExistsWarning( $this->mLocalFile );
 550                         }
 551
 552                         $warning .= $this->getDupeWarning( $this->mTempPath, $finalExt );
 553
 554                         if( $warning != '' ) {
 555                                 /**
 556                                  * Stash the file in a temporary location; the user can choose
 557                                  * to let it through and we'll complete the upload then.
 558                                  */
 559                                 $resultDetails = array( 'warning' => $warning );
 560                                 return self::UPLOAD_WARNING;
 561                         }
 562                 }
 563
 564                 /**
 565                  * Try actually saving the thing...
 566                  * It will show an error form on failure.
 567                  */
 568                 $pageText = self::getInitialPageText( $this->mComment, $this->mLicense,
 569                         $this->mCopyrightStatus, $this->mCopyrightSource );
 570
 571                 $status = $this->mLocalFile->upload( $this->mTempPath, $this->mComment, $pageText,
 572                         File::DELETE_SOURCE, $this->mFileProps );
 573                 if ( !$status->isGood() ) {
 574                         $resultDetails = array( 'internal' => $status->getWikiText() );
 575                         return self::INTERNAL_ERROR;
 576                 } else {
 577                         if ( $this->mWatchthis ) {
 578                                 global $wgUser;
 579                                 $wgUser->addWatch( $this->mLocalFile->getTitle() );
 580                         }
 581                         // Success, redirect to description page
 582                         $img = null; // @todo: added to avoid passing a ref to null - should this be defined somewhere?
 583                         wfRunHooks( 'UploadComplete', array( &$this ) );
 584                         return self::SUCCESS;
 585                 }
 586         }
 587
 588         /**
 589          * Do existence checks on a file and produce a warning
 590          * This check is static and can be done pre-upload via AJAX
 591          * Returns an HTML fragment consisting of one or more LI elements if there is a warning
 592          * Returns an empty string if there is no warning
 593          */
 594         static function getExistsWarning( $file ) {
 595                 global $wgUser, $wgContLang;
 596                 // Check for uppercase extension. We allow these filenames but check if an image
 597                 // with lowercase extension exists already
 598                 $warning = '';
 599                 $align = $wgContLang->isRtl() ? 'left' : 'right';
 600
 601                 if( strpos( $file->getName(), '.' ) == false ) {
 602                         $partname = $file->getName();
 603                         $rawExtension = '';
 604                 } else {
 605                         $n = strrpos( $file->getName(), '.' );
 606                         $rawExtension = substr( $file->getName(), $n + 1 );
 607                         $partname = substr( $file->getName(), 0, $n );
 608                 }
 609
 610                 $sk = $wgUser->getSkin();
 611
 612                 if ( $rawExtension != $file->getExtension() ) {
 613                         // We're not using the normalized form of the extension.
 614                         // Normal form is lowercase, using most common of alternate
 615                         // extensions (eg 'jpg' rather than 'JPEG').
 616                         //
 617                         // Check for another file using the normalized form...
 618                         $nt_lc = Title::makeTitle( NS_FILE, $partname . '.' . $file->getExtension() );
 619                         $file_lc = wfLocalFile( $nt_lc );
 620                 } else {
 621                         $file_lc = false;
 622                 }
 623
 624                 if( $file->exists() ) {
 625                         $dlink = $sk->makeKnownLinkObj( $file->getTitle() );
 626                         if ( $file->allowInlineDisplay() ) {
 627                                 $dlink2 = $sk->makeImageLinkObj( $file->getTitle(), wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 628                                         $file->getName(), $align, array(), false, true );
 629                         } elseif ( !$file->allowInlineDisplay() && $file->isSafeFile() ) {
 630                                 $icon = $file->iconThumb();
 631                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 632                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 633                         } else {
 634                                 $dlink2 = '';
 635                         }
 636
 637                         $warning .= '<li>' . wfMsgExt( 'fileexists', array('parseinline','replaceafter'), $dlink ) . '</li>' . $dlink2;
 638
 639                 } elseif( $file->getTitle()->getArticleID() ) {
 640                         $lnk = $sk->makeKnownLinkObj( $file->getTitle(), '', 'redirect=no' );
 641                         $warning .= '<li>' . wfMsgExt( 'filepageexists', array( 'parseinline', 'replaceafter' ), $lnk ) . '</li>';
 642                 } elseif ( $file_lc && $file_lc->exists() ) {
 643                         # Check if image with lowercase extension exists.
 644                         # It's not forbidden but in 99% it makes no sense to upload the same filename with uppercase extension
 645                         $dlink = $sk->makeKnownLinkObj( $nt_lc );
 646                         if ( $file_lc->allowInlineDisplay() ) {
 647                                 $dlink2 = $sk->makeImageLinkObj( $nt_lc, wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 648                                         $nt_lc->getText(), $align, array(), false, true );
 649                         } elseif ( !$file_lc->allowInlineDisplay() && $file_lc->isSafeFile() ) {
 650                                 $icon = $file_lc->iconThumb();
 651                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 652                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 653                         } else {
 654                                 $dlink2 = '';
 655                         }
 656
 657                         $warning .= '<li>' .
 658                                 wfMsgExt( 'fileexists-extension', 'parsemag',
 659                                         $file->getTitle()->getPrefixedText(), $dlink ) .
 660                                 '</li>' . $dlink2;
 661
 662                 } elseif ( ( substr( $partname , 3, 3 ) == 'px-' || substr( $partname , 2, 3 ) == 'px-' )
 663                         && ereg( "[0-9]{2}" , substr( $partname , 0, 2) ) )
 664                 {
 665                         # Check for filenames like 50px- or 180px-, these are mostly thumbnails
 666                         $nt_thb = Title::newFromText( substr( $partname , strpos( $partname , '-' ) +1 ) . '.' . $rawExtension );
 667                         $file_thb = wfLocalFile( $nt_thb );
 668                         if ($file_thb->exists() ) {
 669                                 # Check if an image without leading '180px-' (or similiar) exists
 670                                 $dlink = $sk->makeKnownLinkObj( $nt_thb);
 671                                 if ( $file_thb->allowInlineDisplay() ) {
 672                                         $dlink2 = $sk->makeImageLinkObj( $nt_thb,
 673                                                 wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 674                                                 $nt_thb->getText(), $align, array(), false, true );
 675                                 } elseif ( !$file_thb->allowInlineDisplay() && $file_thb->isSafeFile() ) {
 676                                         $icon = $file_thb->iconThumb();
 677                                         $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 678                                                 $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' .
 679                                                 $dlink . '</div>';
 680                                 } else {
 681                                         $dlink2 = '';
 682                                 }
 683
 684                                 $warning .= '<li>' . wfMsgExt( 'fileexists-thumbnail-yes', 'parsemag', $dlink ) .
 685                                         '</li>' . $dlink2;
 686                         } else {
 687                                 # Image w/o '180px-' does not exists, but we do not like these filenames
 688                                 $warning .= '<li>' . wfMsgExt( 'file-thumbnail-no', 'parseinline' ,
 689                                         substr( $partname , 0, strpos( $partname , '-' ) +1 ) ) . '</li>';
 690                         }
 691                 }
 692
 693                 $filenamePrefixBlacklist = self::getFilenamePrefixBlacklist();
 694                 # Do the match
 695                 foreach( $filenamePrefixBlacklist as $prefix ) {
 696                         if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
 697                                 $warning .= '<li>' . wfMsgExt( 'filename-bad-prefix', 'parseinline', $prefix ) . '</li>';
 698                                 break;
 699                         }
 700                 }
 701
 702                 if ( $file->wasDeleted() && !$file->exists() ) {
 703                         # If the file existed before and was deleted, warn the user of this
 704                         # Don't bother doing so if the file exists now, however
 705                         $ltitle = SpecialPage::getTitleFor( 'Log' );
 706                         $llink = $sk->makeKnownLinkObj( $ltitle, wfMsgHtml( 'deletionlog' ),
 707                                 'type=delete&page=' . $file->getTitle()->getPrefixedUrl() );
 708                         $warning .= '<li>' . wfMsgWikiHtml( 'filewasdeleted', $llink ) . '</li>';
 709                 }
 710                 return $warning;
 711         }
 712
 713         /**
 714          * Get a list of warnings
 715          *
 716          * @param string local filename, e.g. 'file exists', 'non-descriptive filename'
 717          * @return array list of warning messages
 718          */
 719         static function ajaxGetExistsWarning( $filename ) {
 720                 $file = wfFindFile( $filename );
 721                 if( !$file ) {
 722                         // Force local file so we have an object to do further checks against
 723                         // if there isn't an exact match...
 724                         $file = wfLocalFile( $filename );
 725                 }
 726                 $s = '&nbsp;';
 727                 if ( $file ) {
 728                         $warning = self::getExistsWarning( $file );
 729                         if ( $warning !== '' ) {
 730                                 $s = "<ul>$warning</ul>";
 731                         }
 732                 }
 733                 return $s;
 734         }
 735
 736         /**
 737          * Render a preview of a given license for the AJAX preview on upload
 738          *
 739          * @param string $license
 740          * @return string
 741          */
 742         public static function ajaxGetLicensePreview( $license ) {
 743                 global $wgParser, $wgUser;
 744                 $text = '{{' . $license . '}}';
 745                 $title = Title::makeTitle( NS_FILE, 'Sample.jpg' );
 746                 $options = ParserOptions::newFromUser( $wgUser );
 747
 748                 // Expand subst: first, then live templates...
 749                 $text = $wgParser->preSaveTransform( $text, $title, $wgUser, $options );
 750                 $output = $wgParser->parse( $text, $title, $options );
 751
 752                 return $output->getText();
 753         }
 754
 755         /**
 756          * Check for duplicate files and throw up a warning before the upload
 757          * completes.
 758          */
 759         function getDupeWarning( $tempfile, $extension ) {
 760                 $hash = File::sha1Base36( $tempfile );
 761                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 762                 $archivedImage = new ArchivedFile( null, 0, $hash.".$extension" );
 763                 if( $dupes ) {
 764                         global $wgOut;
 765                         $msg = "<gallery>";
 766                         foreach( $dupes as $file ) {
 767                                 $title = $file->getTitle();
 768                                 $msg .= $title->getPrefixedText() .
 769                                         "|" . $title->getText() . "\n";
 770                         }
 771                         $msg .= "</gallery>";
 772                         return "<li>" .
 773                                 wfMsgExt( "file-exists-duplicate", array( "parse" ), count( $dupes ) ) .
 774                                 $wgOut->parse( $msg ) .
 775                                 "</li>\n";
 776                 } elseif ( $archivedImage->getID() > 0 ) {
 777                         global $wgOut;
 778                         $name = Title::makeTitle( NS_FILE, $archivedImage->getName() )->getPrefixedText();
 779                         return Xml::tags( 'li', null, wfMsgExt( 'file-deleted-duplicate', array( 'parseinline' ), array( $name ) ) );
 780                 } else {
 781                         return '';
 782                 }
 783         }
 784
 785         /**
 786          * Get a list of blacklisted filename prefixes from [[MediaWiki:filename-prefix-blacklist]]
 787          *
 788          * @return array list of prefixes
 789          */
 790         public static function getFilenamePrefixBlacklist() {
 791                 $blacklist = array();
 792                 $message = wfMsgForContent( 'filename-prefix-blacklist' );
 793                 if( $message && !( wfEmptyMsg( 'filename-prefix-blacklist', $message ) || $message == '-' ) ) {
 794                         $lines = explode( "\n", $message );
 795                         foreach( $lines as $line ) {
 796                                 // Remove comment lines
 797                                 $comment = substr( trim( $line ), 0, 1 );
 798                                 if ( $comment == '#' || $comment == '' ) {
 799                                         continue;
 800                                 }
 801                                 // Remove additional comments after a prefix
 802                                 $comment = strpos( $line, '#' );
 803                                 if ( $comment > 0 ) {
 804                                         $line = substr( $line, 0, $comment-1 );
 805                                 }
 806                                 $blacklist[] = trim( $line );
 807                         }
 808                 }
 809                 return $blacklist;
 810         }
 811
 812         /**
 813          * Stash a file in a temporary directory for later processing
 814          * after the user has confirmed it.
 815          *
 816          * If the user doesn't explicitly cancel or accept, these files
 817          * can accumulate in the temp directory.
 818          *
 819          * @param string $saveName - the destination filename
 820          * @param string $tempName - the source temporary file to save
 821          * @return string - full path the stashed file, or false on failure
 822          * @access private
 823          */
 824         function saveTempUploadedFile( $saveName, $tempName ) {
 825                 global $wgOut;
 826                 $repo = RepoGroup::singleton()->getLocalRepo();
 827                 $status = $repo->storeTemp( $saveName, $tempName );
 828                 if ( !$status->isGood() ) {
 829                         $this->showError( $status->getWikiText() );
 830                         return false;
 831                 } else {
 832                         return $status->value;
 833                 }
 834         }
 835
 836         /**
 837          * Stash a file in a temporary directory for later processing,
 838          * and save the necessary descriptive info into the session.
 839          * Returns a key value which will be passed through a form
 840          * to pick up the path info on a later invocation.
 841          *
 842          * @return int
 843          * @access private
 844          */
 845         function stashSession() {
 846                 $stash = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath );
 847
 848                 if( !$stash ) {
 849                         # Couldn't save the file.
 850                         return false;
 851                 }
 852
 853                 $key = mt_rand( 0, 0x7fffffff );
 854                 $_SESSION['wsUploadData'][$key] = array(
 855                         'mTempPath'       => $stash,
 856                         'mFileSize'       => $this->mFileSize,
 857                         'mSrcName'        => $this->mSrcName,
 858                         'mFileProps'      => $this->mFileProps,
 859                         'version'         => self::SESSION_VERSION,
 860                 );
 861                 return $key;
 862         }
 863
 864         /**
 865          * Remove a temporarily kept file stashed by saveTempUploadedFile().
 866          * @access private
 867          * @return success
 868          */
 869         function unsaveUploadedFile() {
 870                 global $wgOut;
 871                 $repo = RepoGroup::singleton()->getLocalRepo();
 872                 $success = $repo->freeTemp( $this->mTempPath );
 873                 if ( ! $success ) {
 874                         $wgOut->showFileDeleteError( $this->mTempPath );
 875                         return false;
 876                 } else {
 877                         return true;
 878                 }
 879         }
 880
 881         /* -------------------------------------------------------------- */
 882
 883         /**
 884          * @param string $error as HTML
 885          * @access private
 886          */
 887         function uploadError( $error ) {
 888                 global $wgOut;
 889                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 890                 $wgOut->addHTML( '<span class="error">' . $error . '</span>' );
 891         }
 892
 893         /**
 894          * There's something wrong with this file, not enough to reject it
 895          * totally but we require manual intervention to save it for real.
 896          * Stash it away, then present a form asking to confirm or cancel.
 897          *
 898          * @param string $warning as HTML
 899          * @access private
 900          */
 901         function uploadWarning( $warning ) {
 902                 global $wgOut;
 903                 global $wgUseCopyrightUpload;
 904
 905                 $this->mSessionKey = $this->stashSession();
 906                 if( !$this->mSessionKey ) {
 907                         # Couldn't save file; an error has been displayed so let's go.
 908                         return;
 909                 }
 910
 911                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 912                 $wgOut->addHTML( '<ul class="warning">' . $warning . "</ul>\n" );
 913
 914                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
 915
 916                 if ( $wgUseCopyrightUpload ) {
 917                         $copyright = Xml::hidden( 'wpUploadCopyStatus', $this->mCopyrightStatus ) . "\n" .
 918                                         Xml::hidden( 'wpUploadSource', $this->mCopyrightSource ) . "\n";
 919                 } else {
 920                         $copyright = '';
 921                 }
 922
 923                 $wgOut->addHTML(
 924                         Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL( 'action=submit' ),
 925                                  'enctype' => 'multipart/form-data', 'id' => 'uploadwarning' ) ) . "\n" .
 926                         Xml::hidden( 'wpIgnoreWarning', '1' ) . "\n" .
 927                         Xml::hidden( 'wpSessionKey', $this->mSessionKey ) . "\n" .
 928                         Xml::hidden( 'wpUploadDescription', $this->mComment ) . "\n" .
 929                         Xml::hidden( 'wpLicense', $this->mLicense ) . "\n" .
 930                         Xml::hidden( 'wpDestFile', $this->mDesiredDestName ) . "\n" .
 931                         Xml::hidden( 'wpWatchthis', $this->mWatchthis ) . "\n" .
 932                         "{$copyright}<br />" .
 933                         Xml::submitButton( wfMsg( 'ignorewarning' ), array ( 'name' => 'wpUpload', 'id' => 'wpUpload', 'checked' => 'checked' ) ) . ' ' .
 934                         Xml::submitButton( wfMsg( 'reuploaddesc' ), array ( 'name' => 'wpReUpload', 'id' => 'wpReUpload' ) ) .
 935                         Xml::closeElement( 'form' ) . "\n"
 936                 );
 937         }
 938
 939         /**
 940          * Displays the main upload form, optionally with a highlighted
 941          * error message up at the top.
 942          *
 943          * @param string $msg as HTML
 944          * @access private
 945          */
 946         function mainUploadForm( $msg='' ) {
 947                 global $wgOut, $wgUser, $wgLang, $wgMaxUploadSize;
 948                 global $wgUseCopyrightUpload, $wgUseAjax, $wgAjaxUploadDestCheck, $wgAjaxLicensePreview;
 949                 global $wgRequest, $wgAllowCopyUploads;
 950                 global $wgStylePath, $wgStyleVersion;
 951
 952                 $useAjaxDestCheck = $wgUseAjax && $wgAjaxUploadDestCheck;
 953                 $useAjaxLicensePreview = $wgUseAjax && $wgAjaxLicensePreview;
 954
 955                 $adc = wfBoolToStr( $useAjaxDestCheck );
 956                 $alp = wfBoolToStr( $useAjaxLicensePreview );
 957                 $autofill = wfBoolToStr( $this->mDesiredDestName == '' );
 958
 959                 $wgOut->addScript( "<script type=\"text/javascript\">
 960 wgAjaxUploadDestCheck = {$adc};
 961 wgAjaxLicensePreview = {$alp};
 962 wgUploadAutoFill = {$autofill};
 963 </script>" );
 964                 $wgOut->addScriptFile( 'upload.js' );
 965                 $wgOut->addScriptFile( 'edit.js' ); // For <charinsert> support
 966
 967                 if( !wfRunHooks( 'UploadForm:initial', array( &$this ) ) )
 968                 {
 969                         wfDebug( "Hook 'UploadForm:initial' broke output of the upload form\n" );
 970                         return false;
 971                 }
 972
 973                 if( $this->mDesiredDestName ) {
 974                         $title = Title::makeTitleSafe( NS_FILE, $this->mDesiredDestName );
 975                         // Show a subtitle link to deleted revisions (to sysops et al only)
 976                         if( $title instanceof Title && ( $count = $title->isDeleted() ) > 0 && $wgUser->isAllowed( 'deletedhistory' ) ) {
 977                                 $link = wfMsgExt(
 978                                         $wgUser->isAllowed( 'delete' ) ? 'thisisdeleted' : 'viewdeleted',
 979                                         array( 'parse', 'replaceafter' ),
 980                                         $wgUser->getSkin()->makeKnownLinkObj(
 981                                                 SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedText() ),
 982                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $count )
 983                                         )
 984                                 );
 985                                 $wgOut->addHTML( "<div id=\"contentSub2\">{$link}</div>" );
 986                         }
 987
 988                         // Show the relevant lines from deletion log (for still deleted files only)
 989                         if( $title instanceof Title && $title->isDeleted() > 0 && !$title->exists() ) {
 990                                 $this->showDeletionLog( $wgOut, $title->getPrefixedText() );
 991                         }
 992                 }
 993
 994                 $cols = intval($wgUser->getOption( 'cols' ));
 995
 996                 if( $wgUser->getOption( 'editwidth' ) ) {
 997                         $width = " style=\"width:100%\"";
 998                 } else {
 999                         $width = '';
1000                 }
1001
1002                 if ( '' != $msg ) {
1003                         $sub = wfMsgHtml( 'uploaderror' );
1004                         $wgOut->addHTML( "<h2>{$sub}</h2>\n" .
1005                           "<span class='error'>{$msg}</span>\n" );
1006                 }
1007
1008                 $uploadMsg = $wgRequest->getVal( 'uploadmsg' );
1009                 if( $uploadMsg ) {
1010                         $uploadMsgName = 'uploadtext-' . $uploadMsg;
1011                         // Fall back to normal message if the custom messages is empty
1012                         if( wfEmptyMsg( $uploadMsgName, wfMsg( $uploadMsgName ) ) )
1013                                 $uploadMsgName = 'uploadtext';
1014                 } else {
1015                         $uploadMsgName = 'uploadtext';
1016                 }
1017
1018                 $wgOut->addHTML( '<div id="uploadtext">' );
1019                 $wgOut->addWikiMsg( $uploadMsgName, $this->mDesiredDestName );
1020                 $wgOut->addHTML( "</div>\n" );
1021
1022                 # Print a list of allowed file extensions, if so configured.  We ignore
1023                 # MIME type here, it's incomprehensible to most people and too long.
1024                 global $wgCheckFileExtensions, $wgStrictFileExtensions,
1025                 $wgFileExtensions, $wgFileBlacklist;
1026
1027                 $allowedExtensions = '';
1028                 if( $wgCheckFileExtensions ) {
1029                         if( $wgStrictFileExtensions ) {
1030                                 # Everything not permitted is banned
1031                                 $extensionsList =
1032                                         '<div id="mw-upload-permitted">' .
1033                                         wfMsgWikiHtml( 'upload-permitted', $wgLang->commaList( $wgFileExtensions ) ) .
1034                                         "</div>\n";
1035                         } else {
1036                                 # We have to list both preferred and prohibited
1037                                 $extensionsList =
1038                                         '<div id="mw-upload-preferred">' .
1039                                         wfMsgWikiHtml( 'upload-preferred', $wgLang->commaList( $wgFileExtensions ) ) .
1040                                         "</div>\n" .
1041                                         '<div id="mw-upload-prohibited">' .
1042                                         wfMsgWikiHtml( 'upload-prohibited', $wgLang->commaList( $wgFileBlacklist ) ) .
1043                                         "</div>\n";
1044                         }
1045                 } else {
1046                         # Everything is permitted.
1047                         $extensionsList = '';
1048                 }
1049
1050                 # Get the maximum file size from php.ini as $wgMaxUploadSize works for uploads from URL via CURL only
1051                 # See http://www.php.net/manual/en/ini.core.php#ini.upload-max-filesize for possible values of upload_max_filesize
1052                 $val = trim( ini_get( 'upload_max_filesize' ) );
1053                 $last = strtoupper( ( substr( $val, -1 ) ) );
1054                 switch( $last ) {
1055                         case 'G':
1056                                 $val2 = substr( $val, 0, -1 ) * 1024 * 1024 * 1024;
1057                                 break;
1058                         case 'M':
1059                                 $val2 = substr( $val, 0, -1 ) * 1024 * 1024;
1060                                 break;
1061                         case 'K':
1062                                 $val2 = substr( $val, 0, -1 ) * 1024;
1063                                 break;
1064                         default:
1065                                 $val2 = $val;
1066                 }
1067                 $val2 = $wgAllowCopyUploads ? min( $wgMaxUploadSize, $val2 ) : $val2;
1068                 $maxUploadSize = '<div id="mw-upload-maxfilesize">' .
1069                         wfMsgExt( 'upload-maxfilesize', array( 'parseinline', 'escapenoentities' ),
1070                                 $wgLang->formatSize( $val2 ) ) .
1071                                 "</div>\n";
1072
1073                 $sourcefilename = wfMsgExt( 'sourcefilename', array( 'parseinline', 'escapenoentities' ) );
1074         $destfilename = wfMsgExt( 'destfilename', array( 'parseinline', 'escapenoentities' ) );
1075
1076                 $summary = wfMsgExt( 'fileuploadsummary', 'parseinline' );
1077
1078                 $licenses = new Licenses();
1079                 $license = wfMsgExt( 'license', array( 'parseinline' ) );
1080                 $nolicense = wfMsgHtml( 'nolicense' );
1081                 $licenseshtml = $licenses->getHtml();
1082
1083                 $ulb = wfMsgHtml( 'uploadbtn' );
1084
1085
1086                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
1087
1088                 $encDestName = htmlspecialchars( $this->mDesiredDestName );
1089
1090                 $watchChecked = $this->watchCheck()
1091                         ? 'checked="checked"'
1092                         : '';
1093                 $warningChecked = $this->mIgnoreWarning ? 'checked' : '';
1094
1095                 // Prepare form for upload or upload/copy
1096                 if( $wgAllowCopyUploads && $wgUser->isAllowed( 'upload_by_url' ) ) {
1097                         $filename_form =
1098                                 "<input type='radio' id='wpSourceTypeFile' name='wpSourceType' value='file' " .
1099                                    "onchange='toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\")' checked='checked' />" .
1100                                  "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1101                                    "onfocus='" .
1102                                      "toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\");" .
1103                                      "toggle_element_check(\"wpSourceTypeFile\",\"wpSourceTypeURL\")' " .
1104                                      "onchange='fillDestFilename(\"wpUploadFile\")' size='60' />" .
1105                                 wfMsgHTML( 'upload_source_file' ) . "<br/>" .
1106                                 "<input type='radio' id='wpSourceTypeURL' name='wpSourceType' value='web' " .
1107                                   "onchange='toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\")' />" .
1108                                 "<input tabindex='1' type='text' name='wpUploadFileURL' id='wpUploadFileURL' " .
1109                                   "onfocus='" .
1110                                     "toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\");" .
1111                                     "toggle_element_check(\"wpSourceTypeURL\",\"wpSourceTypeFile\")' " .
1112                                     "onchange='fillDestFilename(\"wpUploadFileURL\")' size='60' disabled='disabled' />" .
1113                                 wfMsgHtml( 'upload_source_url' ) ;
1114                 } else {
1115                         $filename_form =
1116                                 "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1117                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") .
1118                                 "size='60' />" .
1119                                 "<input type='hidden' name='wpSourceType' value='file' />" ;
1120                 }
1121                 if ( $useAjaxDestCheck ) {
1122                         $warningRow = "<tr><td colspan='2' id='wpDestFile-warning'>&nbsp;</td></tr>";
1123                         $destOnkeyup = 'onkeyup="wgUploadWarningObj.keypress();"';
1124                 } else {
1125                         $warningRow = '';
1126                         $destOnkeyup = '';
1127                 }
1128
1129                 $encComment = htmlspecialchars( $this->mComment );
1130
1131                 $wgOut->addHTML(
1132                          Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL(),
1133                                  'enctype' => 'multipart/form-data', 'id' => 'mw-upload-form' ) ) .
1134                          Xml::openElement( 'fieldset' ) .
1135                          Xml::element( 'legend', null, wfMsg( 'upload' ) ) .
1136                          Xml::openElement( 'table', array( 'border' => '0', 'id' => 'mw-upload-table' ) ) .
1137                          "<tr>
1138                                 {$this->uploadFormTextTop}
1139                                 <td class='mw-label'>
1140                                         <label for='wpUploadFile'>{$sourcefilename}</label>
1141                                 </td>
1142                                 <td class='mw-input'>
1143                                         {$filename_form}
1144                                 </td>
1145                         </tr>
1146                         <tr>
1147                                 <td></td>
1148                                 <td>
1149                                         {$maxUploadSize}
1150                                         {$extensionsList}
1151                                 </td>
1152                         </tr>
1153                         <tr>
1154                                 <td class='mw-label'>
1155                                         <label for='wpDestFile'>{$destfilename}</label>
1156                                 </td>
1157                                 <td class='mw-input'>
1158                                         <input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='60'
1159                                                 value=\"{$encDestName}\" onchange='toggleFilenameFiller()' $destOnkeyup />
1160                                 </td>
1161                         </tr>
1162                         <tr>
1163                                 <td class='mw-label'>
1164                                         <label for='wpUploadDescription'>{$summary}</label>
1165                                 </td>
1166                                 <td class='mw-input'>
1167                                         <textarea tabindex='3' name='wpUploadDescription' id='wpUploadDescription' rows='6'
1168                                                 cols='{$cols}'{$width}>$encComment</textarea>
1169                                         {$this->uploadFormTextAfterSummary}
1170                                 </td>
1171                         </tr>
1172                         <tr>"
1173                 );
1174
1175                 if ( $licenseshtml != '' ) {
1176                         global $wgStylePath;
1177                         $wgOut->addHTML( "
1178                                         <td class='mw-label'>
1179                                                 <label for='wpLicense'>$license</label>
1180                                         </td>
1181                                         <td class='mw-input'>
1182                                                 <select name='wpLicense' id='wpLicense' tabindex='4'
1183                                                         onchange='licenseSelectorCheck()'>
1184                                                         <option value=''>$nolicense</option>
1185                                                         $licenseshtml
1186                                                 </select>
1187                                         </td>
1188                                 </tr>
1189                                 <tr>"
1190                         );
1191                         if( $useAjaxLicensePreview ) {
1192                                 $wgOut->addHTML( "
1193                                                 <td></td>
1194                                                 <td id=\"mw-license-preview\"></td>
1195                                         </tr>
1196                                         <tr>"
1197                                 );
1198                         }
1199                 }
1200
1201                 if ( $wgUseCopyrightUpload ) {
1202                         $filestatus = wfMsgExt( 'filestatus', 'escapenoentities' );
1203                         $copystatus =  htmlspecialchars( $this->mCopyrightStatus );
1204                         $filesource = wfMsgExt( 'filesource', 'escapenoentities' );
1205                         $uploadsource = htmlspecialchars( $this->mCopyrightSource );
1206
1207                         $wgOut->addHTML( "
1208                                         <td class='mw-label' style='white-space: nowrap;'>
1209                                                 <label for='wpUploadCopyStatus'>$filestatus</label></td>
1210                                         <td class='mw-input'>
1211                                                 <input tabindex='5' type='text' name='wpUploadCopyStatus' id='wpUploadCopyStatus'
1212                                                         value=\"$copystatus\" size='60' />
1213                                         </td>
1214                                 </tr>
1215                                 <tr>
1216                                         <td class='mw-label'>
1217                                                 <label for='wpUploadCopyStatus'>$filesource</label>
1218                                         </td>
1219                                         <td class='mw-input'>
1220                                                 <input tabindex='6' type='text' name='wpUploadSource' id='wpUploadCopyStatus'
1221                                                         value=\"$uploadsource\" size='60' />
1222                                         </td>
1223                                 </tr>
1224                                 <tr>"
1225                         );
1226                 }
1227
1228                 $wgOut->addHTML( "
1229                                 <td></td>
1230                                 <td>
1231                                         <input tabindex='7' type='checkbox' name='wpWatchthis' id='wpWatchthis' $watchChecked value='true' />
1232                                         <label for='wpWatchthis'>" . wfMsgHtml( 'watchthisupload' ) . "</label>
1233                                         <input tabindex='8' type='checkbox' name='wpIgnoreWarning' id='wpIgnoreWarning' value='true' $warningChecked/>
1234                                         <label for='wpIgnoreWarning'>" . wfMsgHtml( 'ignorewarnings' ) . "</label>
1235                                 </td>
1236                         </tr>
1237                         $warningRow
1238                         <tr>
1239                                 <td></td>
1240                                         <td class='mw-input'>
1241                                                 <input tabindex='9' type='submit' name='wpUpload' value=\"{$ulb}\"" . $wgUser->getSkin()->tooltipAndAccesskey( 'upload' ) . " />
1242                                         </td>
1243                         </tr>
1244                         <tr>
1245                                 <td></td>
1246                                 <td class='mw-input'>"
1247                 );
1248                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1249                 $wgOut->addHTML( "
1250                                 </td>
1251                         </tr>" .
1252                         Xml::closeElement( 'table' ) .
1253                         Xml::hidden( 'wpDestFileWarningAck', '', array( 'id' => 'wpDestFileWarningAck' ) ) .
1254                         Xml::closeElement( 'fieldset' ) .
1255                         Xml::closeElement( 'form' )
1256                 );
1257                 $uploadfooter = wfMsgNoTrans( 'uploadfooter' );
1258                 if( $uploadfooter != '-' && !wfEmptyMsg( 'uploadfooter', $uploadfooter ) ){
1259                         $wgOut->addWikiText( '<div id="mw-upload-footer-message">' . $uploadfooter . '</div>' );
1260                 }
1261         }
1262
1263         /* -------------------------------------------------------------- */
1264
1265         /**
1266          * See if we should check the 'watch this page' checkbox on the form
1267          * based on the user's preferences and whether we're being asked
1268          * to create a new file or update an existing one.
1269          *
1270          * In the case where 'watch edits' is off but 'watch creations' is on,
1271          * we'll leave the box unchecked.
1272          *
1273          * Note that the page target can be changed *on the form*, so our check
1274          * state can get out of sync.
1275          */
1276         function watchCheck() {
1277                 global $wgUser;
1278                 if( $wgUser->getOption( 'watchdefault' ) ) {
1279                         // Watch all edits!
1280                         return true;
1281                 }
1282
1283                 $local = wfLocalFile( $this->mDesiredDestName );
1284                 if( $local && $local->exists() ) {
1285                         // We're uploading a new version of an existing file.
1286                         // No creation, so don't watch it if we're not already.
1287                         return $local->getTitle()->userIsWatching();
1288                 } else {
1289                         // New page should get watched if that's our option.
1290                         return $wgUser->getOption( 'watchcreations' );
1291                 }
1292         }
1293
1294         /**
1295          * Split a file into a base name and all dot-delimited 'extensions'
1296          * on the end. Some web server configurations will fall back to
1297          * earlier pseudo-'extensions' to determine type and execute
1298          * scripts, so the blacklist needs to check them all.
1299          *
1300          * @return array
1301          */
1302         public function splitExtensions( $filename ) {
1303                 $bits = explode( '.', $filename );
1304                 $basename = array_shift( $bits );
1305                 return array( $basename, $bits );
1306         }
1307
1308         /**
1309          * Perform case-insensitive match against a list of file extensions.
1310          * Returns true if the extension is in the list.
1311          *
1312          * @param string $ext
1313          * @param array $list
1314          * @return bool
1315          */
1316         function checkFileExtension( $ext, $list ) {
1317                 return in_array( strtolower( $ext ), $list );
1318         }
1319
1320         /**
1321          * Perform case-insensitive match against a list of file extensions.
1322          * Returns true if any of the extensions are in the list.
1323          *
1324          * @param array $ext
1325          * @param array $list
1326          * @return bool
1327          */
1328         public function checkFileExtensionList( $ext, $list ) {
1329                 foreach( $ext as $e ) {
1330                         if( in_array( strtolower( $e ), $list ) ) {
1331                                 return true;
1332                         }
1333                 }
1334                 return false;
1335         }
1336
1337         /**
1338          * Verifies that it's ok to include the uploaded file
1339          *
1340          * @param string $tmpfile the full path of the temporary file to verify
1341          * @param string $extension The filename extension that the file is to be served with
1342          * @return mixed true of the file is verified, a WikiError object otherwise.
1343          */
1344         function verify( $tmpfile, $extension ) {
1345                 #magically determine mime type
1346                 $magic = MimeMagic::singleton();
1347                 $mime = $magic->guessMimeType($tmpfile,false);
1348
1349
1350                 #check mime type, if desired
1351                 global $wgVerifyMimeType;
1352                 if ($wgVerifyMimeType) {
1353                         wfDebug ( "\n\nmime: <$mime> extension: <$extension>\n\n");
1354                         #check mime type against file extension
1355                         if( !self::verifyExtension( $mime, $extension ) ) {
1356                                 return new WikiErrorMsg( 'uploadcorrupt' );
1357                         }
1358
1359                         #check mime type blacklist
1360                         global $wgMimeTypeBlacklist;
1361                         if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist) ) {
1362                                 if ( $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
1363                                         return new WikiErrorMsg( 'filetype-badmime', htmlspecialchars( $mime ) );
1364                                 }
1365
1366                                 # Check IE type
1367                                 $fp = fopen( $tmpfile, 'rb' );
1368                                 $chunk = fread( $fp, 256 );
1369                                 fclose( $fp );
1370                                 $extMime = $magic->guessTypesForExtension( $extension );
1371                                 $ieTypes = $magic->getIEMimeTypes( $tmpfile, $chunk, $extMime );
1372                                 foreach ( $ieTypes as $ieType ) {
1373                                         if ( $this->checkFileExtension( $ieType, $wgMimeTypeBlacklist ) ) {
1374                                                 return new WikiErrorMsg( 'filetype-bad-ie-mime', $ieType );
1375                                         }
1376                                 }
1377                         }
1378                 }
1379
1380                 #check for htmlish code and javascript
1381                 if( $this->detectScript ( $tmpfile, $mime, $extension ) ) {
1382                         return new WikiErrorMsg( 'uploadscripted' );
1383                 }
1384                 if( $extension == 'svg' || $mime == 'image/svg+xml' ) {
1385                         if( $this->detectScriptInSvg( $tmpfile ) ) {
1386                                 return new WikiErrorMsg( 'uploadscripted' );
1387                         }
1388                 }
1389
1390                 /**
1391                 * Scan the uploaded file for viruses
1392                 */
1393                 $virus= $this->detectVirus($tmpfile);
1394                 if ( $virus ) {
1395                         return new WikiErrorMsg( 'uploadvirus', htmlspecialchars($virus) );
1396                 }
1397
1398                 wfDebug( __METHOD__.": all clear; passing.\n" );
1399                 return true;
1400         }
1401
1402         /**
1403          * Checks if the mime type of the uploaded file matches the file extension.
1404          *
1405          * @param string $mime the mime type of the uploaded file
1406          * @param string $extension The filename extension that the file is to be served with
1407          * @return bool
1408          */
1409         static function verifyExtension( $mime, $extension ) {
1410                 $magic = MimeMagic::singleton();
1411
1412                 if ( ! $mime || $mime == 'unknown' || $mime == 'unknown/unknown' )
1413                         if ( ! $magic->isRecognizableExtension( $extension ) ) {
1414                                 wfDebug( __METHOD__.": passing file with unknown detected mime type; " .
1415                                         "unrecognized extension '$extension', can't verify\n" );
1416                                 return true;
1417                         } else {
1418                                 wfDebug( __METHOD__.": rejecting file with unknown detected mime type; ".
1419                                         "recognized extension '$extension', so probably invalid file\n" );
1420                                 return false;
1421                         }
1422
1423                 $match= $magic->isMatchingExtension($extension,$mime);
1424
1425                 if ($match===NULL) {
1426                         wfDebug( __METHOD__.": no file extension known for mime type $mime, passing file\n" );
1427                         return true;
1428                 } elseif ($match===true) {
1429                         wfDebug( __METHOD__.": mime type $mime matches extension $extension, passing file\n" );
1430
1431                         #TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
1432                         return true;
1433
1434                 } else {
1435                         wfDebug( __METHOD__.": mime type $mime mismatches file extension $extension, rejecting file\n" );
1436                         return false;
1437                 }
1438         }
1439
1440
1441         /**
1442          * Heuristic for detecting files that *could* contain JavaScript instructions or
1443          * things that may look like HTML to a browser and are thus
1444          * potentially harmful. The present implementation will produce false positives in some situations.
1445          *
1446          * @param string $file Pathname to the temporary upload file
1447          * @param string $mime The mime type of the file
1448          * @param string $extension The extension of the file
1449          * @return bool true if the file contains something looking like embedded scripts
1450          */
1451         function detectScript($file, $mime, $extension) {
1452                 global $wgAllowTitlesInSVG;
1453
1454                 #ugly hack: for text files, always look at the entire file.
1455                 #For binarie field, just check the first K.
1456
1457                 if (strpos($mime,'text/')===0) $chunk = file_get_contents( $file );
1458                 else {
1459                         $fp = fopen( $file, 'rb' );
1460                         $chunk = fread( $fp, 1024 );
1461                         fclose( $fp );
1462                 }
1463
1464                 $chunk= strtolower( $chunk );
1465
1466                 if (!$chunk) return false;
1467
1468                 #decode from UTF-16 if needed (could be used for obfuscation).
1469                 if (substr($chunk,0,2)=="\xfe\xff") $enc= "UTF-16BE";
1470                 elseif (substr($chunk,0,2)=="\xff\xfe") $enc= "UTF-16LE";
1471                 else $enc= NULL;
1472
1473                 if ($enc) $chunk= iconv($enc,"ASCII//IGNORE",$chunk);
1474
1475                 $chunk= trim($chunk);
1476
1477                 #FIXME: convert from UTF-16 if necessarry!
1478
1479                 wfDebug("SpecialUpload::detectScript: checking for embedded scripts and HTML stuff\n");
1480
1481                 #check for HTML doctype
1482                 if (eregi("<!DOCTYPE *X?HTML",$chunk)) return true;
1483
1484                 /**
1485                 * Internet Explorer for Windows performs some really stupid file type
1486                 * autodetection which can cause it to interpret valid image files as HTML
1487                 * and potentially execute JavaScript, creating a cross-site scripting
1488                 * attack vectors.
1489                 *
1490                 * Apple's Safari browser also performs some unsafe file type autodetection
1491                 * which can cause legitimate files to be interpreted as HTML if the
1492                 * web server is not correctly configured to send the right content-type
1493                 * (or if you're really uploading plain text and octet streams!)
1494                 *
1495                 * Returns true if IE is likely to mistake the given file for HTML.
1496                 * Also returns true if Safari would mistake the given file for HTML
1497                 * when served with a generic content-type.
1498                 */
1499
1500                 $tags = array(
1501                         '<a href',
1502                         '<body',
1503                         '<head',
1504                         '<html',   #also in safari
1505                         '<img',
1506                         '<pre',
1507                         '<script', #also in safari
1508                         '<table'
1509                         );
1510                 if( ! $wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
1511                         $tags[] = '<title';
1512                 }
1513
1514                 foreach( $tags as $tag ) {
1515                         if( false !== strpos( $chunk, $tag ) ) {
1516                                 return true;
1517                         }
1518                 }
1519
1520                 /*
1521                 * look for javascript
1522                 */
1523
1524                 #resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1525                 $chunk = Sanitizer::decodeCharReferences( $chunk );
1526
1527                 #look for script-types
1528                 if (preg_match('!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim',$chunk)) return true;
1529
1530                 #look for html-style script-urls
1531                 if (preg_match('!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1532
1533                 #look for css-style script-urls
1534                 if (preg_match('!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1535
1536                 wfDebug("SpecialUpload::detectScript: no scripts found\n");
1537                 return false;
1538         }
1539
1540         function detectScriptInSvg( $filename ) {
1541                 $check = new XmlTypeCheck( $filename, array( $this, 'checkSvgScriptCallback' ) );
1542                 return $check->filterMatch;
1543         }
1544
1545         /**
1546          * @todo Replace this with a whitelist filter!
1547          */
1548         function checkSvgScriptCallback( $element, $attribs ) {
1549                 $stripped = $this->stripXmlNamespace( $element );
1550
1551                 if( $stripped == 'script' ) {
1552                         wfDebug( __METHOD__ . ": Found script element '$element' in uploaded file.\n" );
1553                         return true;
1554                 }
1555
1556                 foreach( $attribs as $attrib => $value ) {
1557                         $stripped = $this->stripXmlNamespace( $attrib );
1558                         if( substr( $stripped, 0, 2 ) == 'on' ) {
1559                                 wfDebug( __METHOD__ . ": Found script attribute '$attrib'='value' in uploaded file.\n" );
1560                                 return true;
1561                         }
1562                         if( $stripped == 'href' && strpos( strtolower( $value ), 'javascript:' ) !== false ) {
1563                                 wfDebug( __METHOD__ . ": Found script href attribute '$attrib'='$value' in uploaded file.\n" );
1564                                 return true;
1565                         }
1566                 }
1567         }
1568
1569         private function stripXmlNamespace( $name ) {
1570                 // 'http://www.w3.org/2000/svg:script' -> 'script'
1571                 $parts = explode( ':', strtolower( $name ) );
1572                 return array_pop( $parts );
1573         }
1574
1575         /**
1576          * Generic wrapper function for a virus scanner program.
1577          * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
1578          * $wgAntivirusRequired may be used to deny upload if the scan fails.
1579          *
1580          * @param string $file Pathname to the temporary upload file
1581          * @return mixed false if not virus is found, NULL if the scan fails or is disabled,
1582          *         or a string containing feedback from the virus scanner if a virus was found.
1583          *         If textual feedback is missing but a virus was found, this function returns true.
1584          */
1585         function detectVirus($file) {
1586                 global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
1587
1588                 if ( !$wgAntivirus ) {
1589                         wfDebug( __METHOD__.": virus scanner disabled\n");
1590                         return NULL;
1591                 }
1592
1593                 if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1594                         wfDebug( __METHOD__.": unknown virus scanner: $wgAntivirus\n" );
1595                         $wgOut->wrapWikiMsg( '<div class="error">$1</div>', array( 'virus-badscanner', $wgAntivirus ) );
1596                         return wfMsg('virus-unknownscanner') . " $wgAntivirus";
1597                 }
1598
1599                 # look up scanner configuration
1600                 $command = $wgAntivirusSetup[$wgAntivirus]["command"];
1601                 $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]["codemap"];
1602                 $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]["messagepattern"] ) ?
1603                         $wgAntivirusSetup[$wgAntivirus]["messagepattern"] : null;
1604
1605                 if ( strpos( $command,"%f" ) === false ) {
1606                         # simple pattern: append file to scan
1607                         $command .= " " . wfEscapeShellArg( $file );
1608                 } else {
1609                         # complex pattern: replace "%f" with file to scan
1610                         $command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
1611                 }
1612
1613                 wfDebug( __METHOD__.": running virus scan: $command \n" );
1614
1615                 # execute virus scanner
1616                 $exitCode = false;
1617
1618                 #NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1619                 #      that does not seem to be worth the pain.
1620                 #      Ask me (Duesentrieb) about it if it's ever needed.
1621                 $output = array();
1622                 if ( wfIsWindows() ) {
1623                         exec( "$command", $output, $exitCode );
1624                 } else {
1625                         exec( "$command 2>&1", $output, $exitCode );
1626                 }
1627
1628                 # map exit code to AV_xxx constants.
1629                 $mappedCode = $exitCode;
1630                 if ( $exitCodeMap ) {
1631                         if ( isset( $exitCodeMap[$exitCode] ) ) {
1632                                 $mappedCode = $exitCodeMap[$exitCode];
1633                         } elseif ( isset( $exitCodeMap["*"] ) ) {
1634                                 $mappedCode = $exitCodeMap["*"];
1635                         }
1636                 }
1637
1638                 if ( $mappedCode === AV_SCAN_FAILED ) {
1639                         # scan failed (code was mapped to false by $exitCodeMap)
1640                         wfDebug( __METHOD__.": failed to scan $file (code $exitCode).\n" );
1641
1642                         if ( $wgAntivirusRequired ) {
1643                                 return wfMsg('virus-scanfailed', array( $exitCode ) );
1644                         } else {
1645                                 return NULL;
1646                         }
1647                 } else if ( $mappedCode === AV_SCAN_ABORTED ) {
1648                         # scan failed because filetype is unknown (probably imune)
1649                         wfDebug( __METHOD__.": unsupported file type $file (code $exitCode).\n" );
1650                         return NULL;
1651                 } else if ( $mappedCode === AV_NO_VIRUS ) {
1652                         # no virus found
1653                         wfDebug( __METHOD__.": file passed virus scan.\n" );
1654                         return false;
1655                 } else {
1656                         $output = join( "\n", $output );
1657                         $output = trim( $output );
1658
1659                         if ( !$output ) {
1660                                 $output = true; #if there's no output, return true
1661                         } elseif ( $msgPattern ) {
1662                                 $groups = array();
1663                                 if ( preg_match( $msgPattern, $output, $groups ) ) {
1664                                         if ( $groups[1] ) {
1665                                                 $output = $groups[1];
1666                                         }
1667                                 }
1668                         }
1669
1670                         wfDebug( __METHOD__.": FOUND VIRUS! scanner feedback: $output \n" );
1671                         return $output;
1672                 }
1673         }
1674
1675         /**
1676          * Check if the temporary file is MacBinary-encoded, as some uploads
1677          * from Internet Explorer on Mac OS Classic and Mac OS X will be.
1678          * If so, the data fork will be extracted to a second temporary file,
1679          * which will then be checked for validity and either kept or discarded.
1680          *
1681          * @access private
1682          */
1683         function checkMacBinary() {
1684                 $macbin = new MacBinary( $this->mTempPath );
1685                 if( $macbin->isValid() ) {
1686                         $dataFile = tempnam( wfTempDir(), "WikiMacBinary" );
1687                         $dataHandle = fopen( $dataFile, 'wb' );
1688
1689                         wfDebug( "SpecialUpload::checkMacBinary: Extracting MacBinary data fork to $dataFile\n" );
1690                         $macbin->extractData( $dataHandle );
1691
1692                         $this->mTempPath = $dataFile;
1693                         $this->mFileSize = $macbin->dataForkLength();
1694
1695                         // We'll have to manually remove the new file if it's not kept.
1696                         $this->mRemoveTempFile = true;
1697                 }
1698                 $macbin->close();
1699         }
1700
1701         /**
1702          * If we've modified the upload file we need to manually remove it
1703          * on exit to clean up.
1704          * @access private
1705          */
1706         function cleanupTempFile() {
1707                 if ( $this->mRemoveTempFile && file_exists( $this->mTempPath ) ) {
1708                         wfDebug( "SpecialUpload::cleanupTempFile: Removing temporary file {$this->mTempPath}\n" );
1709                         unlink( $this->mTempPath );
1710                 }
1711         }
1712
1713         /**
1714          * Check if there's an overwrite conflict and, if so, if restrictions
1715          * forbid this user from performing the upload.
1716          *
1717          * @return mixed true on success, WikiError on failure
1718          * @access private
1719          */
1720         function checkOverwrite( $name ) {
1721                 $img = wfFindFile( $name );
1722
1723                 $error = '';
1724                 if( $img ) {
1725                         global $wgUser, $wgOut;
1726                         if( $img->isLocal() ) {
1727                                 if( !self::userCanReUpload( $wgUser, $img->name ) ) {
1728                                         $error = 'fileexists-forbidden';
1729                                 }
1730                         } else {
1731                                 if( !$wgUser->isAllowed( 'reupload' ) ||
1732                                     !$wgUser->isAllowed( 'reupload-shared' ) ) {
1733                                         $error = "fileexists-shared-forbidden";
1734                                 }
1735                         }
1736                 }
1737
1738                 if( $error ) {
1739                         $errorText = wfMsg( $error, wfEscapeWikiText( $img->getName() ) );
1740                         return $errorText;
1741                 }
1742
1743                 // Rockin', go ahead and upload
1744                 return true;
1745         }
1746
1747          /**
1748          * Check if a user is the last uploader
1749          *
1750          * @param User $user
1751          * @param string $img, image name
1752          * @return bool
1753          */
1754         public static function userCanReUpload( User $user, $img ) {
1755                 if( $user->isAllowed( 'reupload' ) )
1756                         return true; // non-conditional
1757                 if( !$user->isAllowed( 'reupload-own' ) )
1758                         return false;
1759
1760                 $dbr = wfGetDB( DB_SLAVE );
1761                 $row = $dbr->selectRow('image',
1762                 /* SELECT */ 'img_user',
1763                 /* WHERE */ array( 'img_name' => $img )
1764                 );
1765                 if ( !$row )
1766                         return false;
1767
1768                 return $user->getId() == $row->img_user;
1769         }
1770
1771         /**
1772          * Display an error with a wikitext description
1773          */
1774         function showError( $description ) {
1775                 global $wgOut;
1776                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
1777                 $wgOut->setRobotPolicy( "noindex,nofollow" );
1778                 $wgOut->setArticleRelated( false );
1779                 $wgOut->enableClientCache( false );
1780                 $wgOut->addWikiText( $description );
1781         }
1782
1783         /**
1784          * Get the initial image page text based on a comment and optional file status information
1785          */
1786         static function getInitialPageText( $comment, $license, $copyStatus, $source ) {
1787                 global $wgUseCopyrightUpload;
1788                 if ( $wgUseCopyrightUpload ) {
1789                         if ( $license != '' ) {
1790                                 $licensetxt = '== ' . wfMsgForContent( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1791                         }
1792                         $pageText = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n" .
1793                           '== ' . wfMsgForContent ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
1794                           "$licensetxt" .
1795                           '== ' . wfMsgForContent ( 'filesource' ) . " ==\n" . $source ;
1796                 } else {
1797                         if ( $license != '' ) {
1798                                 $filedesc = $comment == '' ? '' : '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n";
1799                                  $pageText = $filedesc .
1800                                          '== ' . wfMsgForContent ( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1801                         } else {
1802                                 $pageText = $comment;
1803                         }
1804                 }
1805                 return $pageText;
1806         }
1807
1808         /**
1809          * If there are rows in the deletion log for this file, show them,
1810          * along with a nice little note for the user
1811          *
1812          * @param OutputPage $out
1813          * @param string filename
1814          */
1815         private function showDeletionLog( $out, $filename ) {
1816                 global $wgUser;
1817                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
1818                 $pager = new LogPager( $loglist, 'delete', false, $filename );
1819                 if( $pager->getNumRows() > 0 ) {
1820                         $out->addHTML( '<div class="mw-warning-with-logexcerpt">' );
1821                         $out->addWikiMsg( 'upload-wasdeleted' );
1822                         $out->addHTML(
1823                                 $loglist->beginLogEventsList() .
1824                                 $pager->getBody() .
1825                                 $loglist->endLogEventsList()
1826                         );
1827                         $out->addHTML( '</div>' );
1828                 }
1829         }
1830 }