includes/specials/SpecialUpload.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup SpecialPage
   5  */
   6
   7
   8 /**
   9  * Entry point
  10  */
  11 function wfSpecialUpload() {
  12         global $wgRequest;
  13         $form = new UploadForm( $wgRequest );
  14         $form->execute();
  15 }
  16
  17 /**
  18  * implements Special:Upload
  19  * @ingroup SpecialPage
  20  */
  21 class UploadForm {
  22         const SUCCESS = 0;
  23         const BEFORE_PROCESSING = 1;
  24         const LARGE_FILE_SERVER = 2;
  25         const EMPTY_FILE = 3;
  26         const MIN_LENGTH_PARTNAME = 4;
  27         const ILLEGAL_FILENAME = 5;
  28         const PROTECTED_PAGE = 6;
  29         const OVERWRITE_EXISTING_FILE = 7;
  30         const FILETYPE_MISSING = 8;
  31         const FILETYPE_BADTYPE = 9;
  32         const VERIFICATION_ERROR = 10;
  33         const UPLOAD_VERIFICATION_ERROR = 11;
  34         const UPLOAD_WARNING = 12;
  35         const INTERNAL_ERROR = 13;
  36
  37         /**#@+
  38          * @access private
  39          */
  40         var $mComment, $mLicense, $mIgnoreWarning, $mCurlError;
  41         var $mDestName, $mTempPath, $mFileSize, $mFileProps;
  42         var $mCopyrightStatus, $mCopyrightSource, $mReUpload, $mAction, $mUploadClicked;
  43         var $mSrcName, $mSessionKey, $mStashed, $mDesiredDestName, $mRemoveTempFile, $mSourceType;
  44         var $mDestWarningAck, $mCurlDestHandle;
  45         var $mLocalFile;
  46
  47         # Placeholders for text injection by hooks (must be HTML)
  48         # extensions should take care to _append_ to the present value
  49         var $uploadFormTextTop;
  50         var $uploadFormTextAfterSummary;
  51
  52         const SESSION_VERSION = 1;
  53         /**#@-*/
  54
  55         /**
  56          * Constructor : initialise object
  57          * Get data POSTed through the form and assign them to the object
  58          * @param $request Data posted.
  59          */
  60         function UploadForm( &$request ) {
  61                 global $wgAllowCopyUploads;
  62                 $this->mDesiredDestName   = $request->getText( 'wpDestFile' );
  63                 $this->mIgnoreWarning     = $request->getCheck( 'wpIgnoreWarning' );
  64                 $this->mComment           = $request->getText( 'wpUploadDescription' );
  65                 $this->mForReUpload       = $request->getBool( 'wpForReUpload' );
  66                 $this->mReUpload          = $request->getCheck( 'wpReUpload' );
  67
  68                 if( !$request->wasPosted() ) {
  69                         # GET requests just give the main form; no data except destination
  70                         # filename and description
  71                         return;
  72                 }
  73
  74                 # Placeholders for text injection by hooks (empty per default)
  75                 $this->uploadFormTextTop = "";
  76                 $this->uploadFormTextAfterSummary = "";
  77                 $this->mUploadClicked     = $request->getCheck( 'wpUpload' );
  78
  79                 $this->mLicense           = $request->getText( 'wpLicense' );
  80                 $this->mCopyrightStatus   = $request->getText( 'wpUploadCopyStatus' );
  81                 $this->mCopyrightSource   = $request->getText( 'wpUploadSource' );
  82                 $this->mWatchthis         = $request->getBool( 'wpWatchthis' );
  83                 $this->mSourceType        = $request->getText( 'wpSourceType' );
  84                 $this->mDestWarningAck    = $request->getText( 'wpDestFileWarningAck' );
  85
  86                 $this->mAction            = $request->getVal( 'action' );
  87
  88                 $this->mSessionKey        = $request->getInt( 'wpSessionKey' );
  89                 if( !empty( $this->mSessionKey ) &&
  90                         isset( $_SESSION['wsUploadData'][$this->mSessionKey]['version'] ) &&
  91                         $_SESSION['wsUploadData'][$this->mSessionKey]['version'] == self::SESSION_VERSION ) {
  92                         /**
  93                          * Confirming a temporarily stashed upload.
  94                          * We don't want path names to be forged, so we keep
  95                          * them in the session on the server and just give
  96                          * an opaque key to the user agent.
  97                          */
  98                         $data = $_SESSION['wsUploadData'][$this->mSessionKey];
  99                         $this->mTempPath         = $data['mTempPath'];
 100                         $this->mFileSize         = $data['mFileSize'];
 101                         $this->mSrcName          = $data['mSrcName'];
 102                         $this->mFileProps        = $data['mFileProps'];
 103                         $this->mCurlError        = 0/*UPLOAD_ERR_OK*/;
 104                         $this->mStashed          = true;
 105                         $this->mRemoveTempFile   = false;
 106                 } else {
 107                         /**
 108                          *Check for a newly uploaded file.
 109                          */
 110                         if( $wgAllowCopyUploads && $this->mSourceType == 'web' ) {
 111                                 $this->initializeFromUrl( $request );
 112                         } else {
 113                                 $this->initializeFromUpload( $request );
 114                         }
 115                 }
 116         }
 117
 118         /**
 119          * Initialize the uploaded file from PHP data
 120          * @access private
 121          */
 122         function initializeFromUpload( $request ) {
 123                 $this->mTempPath       = $request->getFileTempName( 'wpUploadFile' );
 124                 $this->mFileSize       = $request->getFileSize( 'wpUploadFile' );
 125                 $this->mSrcName        = $request->getFileName( 'wpUploadFile' );
 126                 $this->mCurlError      = $request->getUploadError( 'wpUploadFile' );
 127                 $this->mSessionKey     = false;
 128                 $this->mStashed        = false;
 129                 $this->mRemoveTempFile = false; // PHP will handle this
 130         }
 131
 132         /**
 133          * Copy a web file to a temporary file
 134          * @access private
 135          */
 136         function initializeFromUrl( $request ) {
 137                 global $wgTmpDirectory;
 138                 $url = $request->getText( 'wpUploadFileURL' );
 139                 $local_file = tempnam( $wgTmpDirectory, 'WEBUPLOAD' );
 140
 141                 $this->mTempPath       = $local_file;
 142                 $this->mFileSize       = 0; # Will be set by curlCopy
 143                 $this->mCurlError      = $this->curlCopy( $url, $local_file );
 144                 $pathParts             = explode( '/', $url );
 145                 $this->mSrcName        = array_pop( $pathParts );
 146                 $this->mSessionKey     = false;
 147                 $this->mStashed        = false;
 148
 149                 // PHP won't auto-cleanup the file
 150                 $this->mRemoveTempFile = file_exists( $local_file );
 151         }
 152
 153         /**
 154          * Safe copy from URL
 155          * Returns true if there was an error, false otherwise
 156          */
 157         private function curlCopy( $url, $dest ) {
 158                 global $wgUser, $wgOut, $wgHTTPProxy;
 159
 160                 if( !$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                 if( $wgHTTPProxy ) {
 187                         curl_setopt( $ch, CURLOPT_PROXY, $wgHTTPProxy );
 188                 }
 189                 curl_setopt( $ch, CURLOPT_WRITEFUNCTION, array( $this, 'uploadCurlCallback' ) );
 190                 curl_exec( $ch );
 191                 $error = curl_errno( $ch ) ? true : false;
 192                 $errornum =  curl_errno( $ch );
 193                 // if ( $error ) print curl_error ( $ch ) ; # Debugging output
 194                 curl_close( $ch );
 195
 196                 fclose( $this->mCurlDestHandle );
 197                 unset( $this->mCurlDestHandle );
 198                 if( $error ) {
 199                         unlink( $dest );
 200                         if( wfEmptyMsg( "upload-curl-error$errornum", wfMsg("upload-curl-error$errornum") ) )
 201                                 $wgOut->showErrorPage( 'upload-misc-error', 'upload-misc-error-text' );
 202                         else
 203                                 $wgOut->showErrorPage( "upload-curl-error$errornum", "upload-curl-error$errornum-text" );
 204                 }
 205
 206                 return $error;
 207         }
 208
 209         /**
 210          * Callback function for CURL-based web transfer
 211          * Write data to file unless we've passed the length limit;
 212          * if so, abort immediately.
 213          * @access private
 214          */
 215         function uploadCurlCallback( $ch, $data ) {
 216                 global $wgMaxUploadSize;
 217                 $length = strlen( $data );
 218                 $this->mFileSize += $length;
 219                 if( $this->mFileSize > $wgMaxUploadSize ) {
 220                         return 0;
 221                 }
 222                 fwrite( $this->mCurlDestHandle, $data );
 223                 return $length;
 224         }
 225
 226         /**
 227          * Start doing stuff
 228          * @access public
 229          */
 230         function execute() {
 231                 global $wgUser, $wgOut;
 232                 global $wgEnableUploads;
 233
 234                 # Check php's file_uploads setting
 235                 if( !wfIniGetBool( 'file_uploads' ) ) {
 236                         $wgOut->showErrorPage( 'uploaddisabled', 'php-uploaddisabledtext', array( $this->mDesiredDestName ) );
 237                         return;
 238                 }
 239
 240                 # Check uploading enabled
 241                 if( !$wgEnableUploads ) {
 242                         $wgOut->showErrorPage( 'uploaddisabled', 'uploaddisabledtext', array( $this->mDesiredDestName ) );
 243                         return;
 244                 }
 245
 246                 # Check permissions
 247                 if( !$wgUser->isAllowed( 'upload' ) ) {
 248                         if( !$wgUser->isLoggedIn() ) {
 249                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
 250                         } else {
 251                                 $wgOut->permissionRequired( 'upload' );
 252                         }
 253                         return;
 254                 }
 255
 256                 # Check blocks
 257                 if( $wgUser->isBlocked() ) {
 258                         $wgOut->blockedPage();
 259                         return;
 260                 }
 261
 262                 if( wfReadOnly() ) {
 263                         $wgOut->readOnlyPage();
 264                         return;
 265                 }
 266
 267                 if( $this->mReUpload ) {
 268                         if( !$this->unsaveUploadedFile() ) {
 269                                 return;
 270                         }
 271                         # Because it is probably checked and shouldn't be
 272                         $this->mIgnoreWarning = false;
 273
 274                         $this->mainUploadForm();
 275                 } else if( 'submit' == $this->mAction || $this->mUploadClicked ) {
 276                         $this->processUpload();
 277                 } else {
 278                         $this->mainUploadForm();
 279                 }
 280
 281                 $this->cleanupTempFile();
 282         }
 283
 284         /**
 285          * Do the upload
 286          * Checks are made in SpecialUpload::execute()
 287          *
 288          * @access private
 289          */
 290         function processUpload(){
 291                 global $wgUser, $wgOut, $wgFileExtensions, $wgLang;
 292                 $details = null;
 293                 $value = null;
 294                 $value = $this->internalProcessUpload( $details );
 295
 296                 switch($value) {
 297                         case self::SUCCESS:
 298                                 $wgOut->redirect( $this->mLocalFile->getTitle()->getFullURL() );
 299                                 break;
 300
 301                         case self::BEFORE_PROCESSING:
 302                                 break;
 303
 304                         case self::LARGE_FILE_SERVER:
 305                                 $this->mainUploadForm( wfMsgHtml( 'largefileserver' ) );
 306                                 break;
 307
 308                         case self::EMPTY_FILE:
 309                                 $this->mainUploadForm( wfMsgHtml( 'emptyfile' ) );
 310                                 break;
 311
 312                         case self::MIN_LENGTH_PARTNAME:
 313                                 $this->mainUploadForm( wfMsgHtml( 'minlength1' ) );
 314                                 break;
 315
 316                         case self::ILLEGAL_FILENAME:
 317                                 $filtered = $details['filtered'];
 318                                 $this->uploadError( wfMsgWikiHtml( 'illegalfilename', htmlspecialchars( $filtered ) ) );
 319                                 break;
 320
 321                         case self::PROTECTED_PAGE:
 322                                 $wgOut->showPermissionsErrorPage( $details['permissionserrors'] );
 323                                 break;
 324
 325                         case self::OVERWRITE_EXISTING_FILE:
 326                                 $errorText = $details['overwrite'];
 327                                 $this->uploadError( $wgOut->parse( $errorText ) );
 328                                 break;
 329
 330                         case self::FILETYPE_MISSING:
 331                                 $this->uploadError( wfMsgExt( 'filetype-missing', array ( 'parseinline' ) ) );
 332                                 break;
 333
 334                         case self::FILETYPE_BADTYPE:
 335                                 $finalExt = $details['finalExt'];
 336                                 $this->uploadError(
 337                                         wfMsgExt( 'filetype-banned-type',
 338                                                 array( 'parseinline' ),
 339                                                 htmlspecialchars( $finalExt ),
 340                                                 $wgLang->commaList( $wgFileExtensions ),
 341                                                 $wgLang->formatNum( count($wgFileExtensions) )
 342                                         )
 343                                 );
 344                                 break;
 345
 346                         case self::VERIFICATION_ERROR:
 347                                 $veri = $details['veri'];
 348                                 $this->uploadError( $veri->toString() );
 349                                 break;
 350
 351                         case self::UPLOAD_VERIFICATION_ERROR:
 352                                 $error = $details['error'];
 353                                 $this->uploadError( $error );
 354                                 break;
 355
 356                         case self::UPLOAD_WARNING:
 357                                 $warning = $details['warning'];
 358                                 $this->uploadWarning( $warning );
 359                                 break;
 360
 361                         case self::INTERNAL_ERROR:
 362                                 $internal = $details['internal'];
 363                                 $this->showError( $internal );
 364                                 break;
 365
 366                         default:
 367                                 throw new MWException( __METHOD__ . ": Unknown value `{$value}`" );
 368                 }
 369         }
 370
 371         /**
 372          * Really do the upload
 373          * Checks are made in SpecialUpload::execute()
 374          *
 375          * @param array $resultDetails contains result-specific dict of additional values
 376          *
 377          * @access private
 378          */
 379         function internalProcessUpload( &$resultDetails ) {
 380                 global $wgUser;
 381
 382                 if( !wfRunHooks( 'UploadForm:BeforeProcessing', array( &$this ) ) )
 383                 {
 384                         wfDebug( "Hook 'UploadForm:BeforeProcessing' broke processing the file.\n" );
 385                         return self::BEFORE_PROCESSING;
 386                 }
 387
 388                 /**
 389                  * If there was no filename or a zero size given, give up quick.
 390                  */
 391                 if( trim( $this->mSrcName ) == '' || empty( $this->mFileSize ) ) {
 392                         return self::EMPTY_FILE;
 393                 }
 394
 395                 /* Check for curl error */
 396                 if( $this->mCurlError ) {
 397                         return self::BEFORE_PROCESSING;
 398                 }
 399
 400                 /**
 401                  * Chop off any directories in the given filename. Then
 402                  * filter out illegal characters, and try to make a legible name
 403                  * out of it. We'll strip some silently that Title would die on.
 404                  */
 405                 if( $this->mDesiredDestName ) {
 406                         $basename = $this->mDesiredDestName;
 407                 } else {
 408                         $basename = $this->mSrcName;
 409                 }
 410                 $filtered = wfStripIllegalFilenameChars( $basename );
 411
 412                 /* Normalize to title form before we do any further processing */
 413                 $nt = Title::makeTitleSafe( NS_FILE, $filtered );
 414                 if( is_null( $nt ) ) {
 415                         $resultDetails = array( 'filtered' => $filtered );
 416                         return self::ILLEGAL_FILENAME;
 417                 }
 418                 $filtered = $nt->getDBkey();
 419
 420                 /**
 421                  * We'll want to blacklist against *any* 'extension', and use
 422                  * only the final one for the whitelist.
 423                  */
 424                 list( $partname, $ext ) = $this->splitExtensions( $filtered );
 425
 426                 if( count( $ext ) ) {
 427                         $finalExt = $ext[count( $ext ) - 1];
 428                 } else {
 429                         $finalExt = '';
 430                 }
 431
 432                 # If there was more than one "extension", reassemble the base
 433                 # filename to prevent bogus complaints about length
 434                 if( count( $ext ) > 1 ) {
 435                         for( $i = 0; $i < count( $ext ) - 1; $i++ )
 436                                 $partname .= '.' . $ext[$i];
 437                 }
 438
 439                 if( strlen( $partname ) < 1 ) {
 440                         return self::MIN_LENGTH_PARTNAME;
 441                 }
 442
 443                 $this->mLocalFile = wfLocalFile( $nt );
 444                 $this->mDestName = $this->mLocalFile->getName();
 445
 446                 /**
 447                  * If the image is protected, non-sysop users won't be able
 448                  * to modify it by uploading a new revision.
 449                  */
 450                 $permErrors = $nt->getUserPermissionsErrors( 'edit', $wgUser );
 451                 $permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $wgUser );
 452                 $permErrorsCreate = ( $nt->exists() ? array() : $nt->getUserPermissionsErrors( 'create', $wgUser ) );
 453
 454                 if( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
 455                         // merge all the problems into one list, avoiding duplicates
 456                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
 457                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );
 458                         $resultDetails = array( 'permissionserrors' => $permErrors );
 459                         return self::PROTECTED_PAGE;
 460                 }
 461
 462                 /**
 463                  * In some cases we may forbid overwriting of existing files.
 464                  */
 465                 $overwrite = $this->checkOverwrite( $this->mDestName );
 466                 if( $overwrite !== true ) {
 467                         $resultDetails = array( 'overwrite' => $overwrite );
 468                         return self::OVERWRITE_EXISTING_FILE;
 469                 }
 470
 471                 /* Don't allow users to override the blacklist (check file extension) */
 472                 global $wgCheckFileExtensions, $wgStrictFileExtensions;
 473                 global $wgFileExtensions, $wgFileBlacklist;
 474                 if ($finalExt == '') {
 475                         return self::FILETYPE_MISSING;
 476                 } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) ||
 477                                 ($wgCheckFileExtensions && $wgStrictFileExtensions &&
 478                                         !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) ) {
 479                         $resultDetails = array( 'finalExt' => $finalExt );
 480                         return self::FILETYPE_BADTYPE;
 481                 }
 482
 483                 /**
 484                  * Look at the contents of the file; if we can recognize the
 485                  * type but it's corrupt or data of the wrong type, we should
 486                  * probably not accept it.
 487                  */
 488                 if( !$this->mStashed ) {
 489                         $this->mFileProps = File::getPropsFromPath( $this->mTempPath, $finalExt );
 490                         $this->checkMacBinary();
 491                         $veri = $this->verify( $this->mTempPath, $finalExt );
 492
 493                         if( $veri !== true ) { //it's a wiki error...
 494                                 $resultDetails = array( 'veri' => $veri );
 495                                 return self::VERIFICATION_ERROR;
 496                         }
 497
 498                         /**
 499                          * Provide an opportunity for extensions to add further checks
 500                          */
 501                         $error = '';
 502                         if( !wfRunHooks( 'UploadVerification',
 503                                         array( $this->mDestName, $this->mTempPath, &$error ) ) ) {
 504                                 $resultDetails = array( 'error' => $error );
 505                                 return self::UPLOAD_VERIFICATION_ERROR;
 506                         }
 507                 }
 508
 509
 510                 /**
 511                  * Check for non-fatal conditions
 512                  */
 513                 if ( ! $this->mIgnoreWarning ) {
 514                         $warning = '';
 515
 516                         $comparableName = str_replace( ' ', '_', $basename );
 517                         global $wgCapitalLinks, $wgContLang;
 518                         if ( $wgCapitalLinks ) {
 519                                 $comparableName = $wgContLang->ucfirst( $comparableName );
 520                         }
 521
 522                         if( $comparableName !== $filtered ) {
 523                                 $warning .=  '<li>'.wfMsgHtml( 'badfilename', htmlspecialchars( $this->mDestName ) ).'</li>';
 524                         }
 525
 526                         global $wgCheckFileExtensions;
 527                         if ( $wgCheckFileExtensions ) {
 528                                 if ( !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) {
 529                                         global $wgLang;
 530                                         $warning .= '<li>' .
 531                                         wfMsgExt( 'filetype-unwanted-type',
 532                                                 array( 'parseinline' ),
 533                                                 htmlspecialchars( $finalExt ),
 534                                                 $wgLang->commaList( $wgFileExtensions ),
 535                                                 $wgLang->formatNum( count($wgFileExtensions) )
 536                                         ) . '</li>';
 537                                 }
 538                         }
 539
 540                         global $wgUploadSizeWarning;
 541                         if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) {
 542                                 $skin = $wgUser->getSkin();
 543                                 $wsize = $skin->formatSize( $wgUploadSizeWarning );
 544                                 $asize = $skin->formatSize( $this->mFileSize );
 545                                 $warning .= '<li>' . wfMsgHtml( 'large-file', $wsize, $asize ) . '</li>';
 546                         }
 547                         if ( $this->mFileSize == 0 ) {
 548                                 $warning .= '<li>'.wfMsgHtml( 'emptyfile' ).'</li>';
 549                         }
 550
 551                         if ( !$this->mDestWarningAck ) {
 552                                 $warning .= self::getExistsWarning( $this->mLocalFile );
 553                         }
 554
 555                         $warning .= $this->getDupeWarning( $this->mTempPath, $finalExt, $nt );
 556
 557                         if( $warning != '' ) {
 558                                 /**
 559                                  * Stash the file in a temporary location; the user can choose
 560                                  * to let it through and we'll complete the upload then.
 561                                  */
 562                                 $resultDetails = array( 'warning' => $warning );
 563                                 return self::UPLOAD_WARNING;
 564                         }
 565                 }
 566
 567                 /**
 568                  * Try actually saving the thing...
 569                  * It will show an error form on failure.
 570                  */
 571                 if( !$this->mForReUpload ) {
 572                         $pageText = self::getInitialPageText( $this->mComment, $this->mLicense,
 573                                 $this->mCopyrightStatus, $this->mCopyrightSource );
 574                 }
 575
 576                 $status = $this->mLocalFile->upload( $this->mTempPath, $this->mComment, $pageText,
 577                         File::DELETE_SOURCE, $this->mFileProps );
 578                 if ( !$status->isGood() ) {
 579                         $resultDetails = array( 'internal' => $status->getWikiText() );
 580                         return self::INTERNAL_ERROR;
 581                 } else {
 582                         if ( $this->mWatchthis ) {
 583                                 global $wgUser;
 584                                 $wgUser->addWatch( $this->mLocalFile->getTitle() );
 585                         }
 586                         // Success, redirect to description page
 587                         $img = null; // @todo: added to avoid passing a ref to null - should this be defined somewhere?
 588                         wfRunHooks( 'UploadComplete', array( &$this ) );
 589                         return self::SUCCESS;
 590                 }
 591         }
 592
 593         /**
 594          * Do existence checks on a file and produce a warning
 595          * This check is static and can be done pre-upload via AJAX
 596          * Returns an HTML fragment consisting of one or more LI elements if there is a warning
 597          * Returns an empty string if there is no warning
 598          */
 599         static function getExistsWarning( $file ) {
 600                 global $wgUser, $wgContLang;
 601                 // Check for uppercase extension. We allow these filenames but check if an image
 602                 // with lowercase extension exists already
 603                 $warning = '';
 604                 $align = $wgContLang->isRtl() ? 'left' : 'right';
 605
 606                 if( strpos( $file->getName(), '.' ) == false ) {
 607                         $partname = $file->getName();
 608                         $rawExtension = '';
 609                 } else {
 610                         $n = strrpos( $file->getName(), '.' );
 611                         $rawExtension = substr( $file->getName(), $n + 1 );
 612                         $partname = substr( $file->getName(), 0, $n );
 613                 }
 614
 615                 $sk = $wgUser->getSkin();
 616
 617                 if ( $rawExtension != $file->getExtension() ) {
 618                         // We're not using the normalized form of the extension.
 619                         // Normal form is lowercase, using most common of alternate
 620                         // extensions (eg 'jpg' rather than 'JPEG').
 621                         //
 622                         // Check for another file using the normalized form...
 623                         $nt_lc = Title::makeTitle( NS_FILE, $partname . '.' . $file->getExtension() );
 624                         $file_lc = wfLocalFile( $nt_lc );
 625                 } else {
 626                         $file_lc = false;
 627                 }
 628
 629                 if( $file->exists() ) {
 630                         $dlink = $sk->makeKnownLinkObj( $file->getTitle() );
 631                         if ( $file->allowInlineDisplay() ) {
 632                                 $dlink2 = $sk->makeImageLinkObj( $file->getTitle(), wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 633                                         $file->getName(), $align, array(), false, true );
 634                         } elseif ( !$file->allowInlineDisplay() && $file->isSafeFile() ) {
 635                                 $icon = $file->iconThumb();
 636                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 637                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 638                         } else {
 639                                 $dlink2 = '';
 640                         }
 641
 642                         $warning .= '<li>' . wfMsgExt( 'fileexists', array('parseinline','replaceafter'), $dlink ) . '</li>' . $dlink2;
 643
 644                 } elseif( $file->getTitle()->getArticleID() ) {
 645                         $lnk = $sk->makeKnownLinkObj( $file->getTitle(), '', 'redirect=no' );
 646                         $warning .= '<li>' . wfMsgExt( 'filepageexists', array( 'parseinline', 'replaceafter' ), $lnk ) . '</li>';
 647                 } elseif ( $file_lc && $file_lc->exists() ) {
 648                         # Check if image with lowercase extension exists.
 649                         # It's not forbidden but in 99% it makes no sense to upload the same filename with uppercase extension
 650                         $dlink = $sk->makeKnownLinkObj( $nt_lc );
 651                         if ( $file_lc->allowInlineDisplay() ) {
 652                                 $dlink2 = $sk->makeImageLinkObj( $nt_lc, wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 653                                         $nt_lc->getText(), $align, array(), false, true );
 654                         } elseif ( !$file_lc->allowInlineDisplay() && $file_lc->isSafeFile() ) {
 655                                 $icon = $file_lc->iconThumb();
 656                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 657                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 658                         } else {
 659                                 $dlink2 = '';
 660                         }
 661
 662                         $warning .= '<li>' .
 663                                 wfMsgExt( 'fileexists-extension', 'parsemag',
 664                                         $file->getTitle()->getPrefixedText(), $dlink ) .
 665                                 '</li>' . $dlink2;
 666
 667                 } elseif ( ( substr( $partname , 3, 3 ) == 'px-' || substr( $partname , 2, 3 ) == 'px-' )
 668                         && ereg( "[0-9]{2}" , substr( $partname , 0, 2) ) )
 669                 {
 670                         # Check for filenames like 50px- or 180px-, these are mostly thumbnails
 671                         $nt_thb = Title::newFromText( substr( $partname , strpos( $partname , '-' ) +1 ) . '.' . $rawExtension );
 672                         $file_thb = wfLocalFile( $nt_thb );
 673                         if ($file_thb->exists() ) {
 674                                 # Check if an image without leading '180px-' (or similiar) exists
 675                                 $dlink = $sk->makeKnownLinkObj( $nt_thb);
 676                                 if ( $file_thb->allowInlineDisplay() ) {
 677                                         $dlink2 = $sk->makeImageLinkObj( $nt_thb,
 678                                                 wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 679                                                 $nt_thb->getText(), $align, array(), false, true );
 680                                 } elseif ( !$file_thb->allowInlineDisplay() && $file_thb->isSafeFile() ) {
 681                                         $icon = $file_thb->iconThumb();
 682                                         $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 683                                                 $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' .
 684                                                 $dlink . '</div>';
 685                                 } else {
 686                                         $dlink2 = '';
 687                                 }
 688
 689                                 $warning .= '<li>' . wfMsgExt( 'fileexists-thumbnail-yes', 'parsemag', $dlink ) .
 690                                         '</li>' . $dlink2;
 691                         } else {
 692                                 # Image w/o '180px-' does not exists, but we do not like these filenames
 693                                 $warning .= '<li>' . wfMsgExt( 'file-thumbnail-no', 'parseinline' ,
 694                                         substr( $partname , 0, strpos( $partname , '-' ) +1 ) ) . '</li>';
 695                         }
 696                 }
 697
 698                 $filenamePrefixBlacklist = self::getFilenamePrefixBlacklist();
 699                 # Do the match
 700                 foreach( $filenamePrefixBlacklist as $prefix ) {
 701                         if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
 702                                 $warning .= '<li>' . wfMsgExt( 'filename-bad-prefix', 'parseinline', $prefix ) . '</li>';
 703                                 break;
 704                         }
 705                 }
 706
 707                 if ( $file->wasDeleted() && !$file->exists() ) {
 708                         # If the file existed before and was deleted, warn the user of this
 709                         # Don't bother doing so if the file exists now, however
 710                         $ltitle = SpecialPage::getTitleFor( 'Log' );
 711                         $llink = $sk->makeKnownLinkObj( $ltitle, wfMsgHtml( 'deletionlog' ),
 712                                 'type=delete&page=' . $file->getTitle()->getPrefixedUrl() );
 713                         $warning .= '<li>' . wfMsgWikiHtml( 'filewasdeleted', $llink ) . '</li>';
 714                 }
 715                 return $warning;
 716         }
 717
 718         /**
 719          * Get a list of warnings
 720          *
 721          * @param string local filename, e.g. 'file exists', 'non-descriptive filename'
 722          * @return array list of warning messages
 723          */
 724         static function ajaxGetExistsWarning( $filename ) {
 725                 $file = wfFindFile( $filename );
 726                 if( !$file ) {
 727                         // Force local file so we have an object to do further checks against
 728                         // if there isn't an exact match...
 729                         $file = wfLocalFile( $filename );
 730                 }
 731                 $s = '&nbsp;';
 732                 if ( $file ) {
 733                         $warning = self::getExistsWarning( $file );
 734                         if ( $warning !== '' ) {
 735                                 $s = "<ul>$warning</ul>";
 736                         }
 737                 }
 738                 return $s;
 739         }
 740
 741         /**
 742          * Render a preview of a given license for the AJAX preview on upload
 743          *
 744          * @param string $license
 745          * @return string
 746          */
 747         public static function ajaxGetLicensePreview( $license ) {
 748                 global $wgParser, $wgUser;
 749                 $text = '{{' . $license . '}}';
 750                 $title = Title::makeTitle( NS_FILE, 'Sample.jpg' );
 751                 $options = ParserOptions::newFromUser( $wgUser );
 752
 753                 // Expand subst: first, then live templates...
 754                 $text = $wgParser->preSaveTransform( $text, $title, $wgUser, $options );
 755                 $output = $wgParser->parse( $text, $title, $options );
 756
 757                 return $output->getText();
 758         }
 759
 760         /**
 761          * Check for duplicate files and throw up a warning before the upload
 762          * completes.
 763          */
 764         function getDupeWarning( $tempfile, $extension, $destinationTitle ) {
 765                 $hash = File::sha1Base36( $tempfile );
 766                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 767                 $archivedImage = new ArchivedFile( null, 0, $hash.".$extension" );
 768                 if( $dupes ) {
 769                         global $wgOut;
 770                         $msg = "<gallery>";
 771                         foreach( $dupes as $file ) {
 772                                 $title = $file->getTitle();
 773                                 # Don't throw the warning when the titles are the same, it's a reupload
 774                                 # and highly redundant.
 775                                 if ( !$title->equals( $destinationTitle ) || !$this->mForReUpload ) {
 776                                         $msg .= $title->getPrefixedText() .
 777                                                 "|" . $title->getText() . "\n";
 778                                 }
 779                         }
 780                         $msg .= "</gallery>";
 781                         return "<li>" .
 782                                 wfMsgExt( "file-exists-duplicate", array( "parse" ), count( $dupes ) ) .
 783                                 $wgOut->parse( $msg ) .
 784                                 "</li>\n";
 785                 } elseif ( $archivedImage->getID() > 0 ) {
 786                         global $wgOut;
 787                         $name = Title::makeTitle( NS_FILE, $archivedImage->getName() )->getPrefixedText();
 788                         return Xml::tags( 'li', null, wfMsgExt( 'file-deleted-duplicate', array( 'parseinline' ), array( $name ) ) );
 789                 } else {
 790                         return '';
 791                 }
 792         }
 793
 794         /**
 795          * Get a list of blacklisted filename prefixes from [[MediaWiki:filename-prefix-blacklist]]
 796          *
 797          * @return array list of prefixes
 798          */
 799         public static function getFilenamePrefixBlacklist() {
 800                 $blacklist = array();
 801                 $message = wfMsgForContent( 'filename-prefix-blacklist' );
 802                 if( $message && !( wfEmptyMsg( 'filename-prefix-blacklist', $message ) || $message == '-' ) ) {
 803                         $lines = explode( "\n", $message );
 804                         foreach( $lines as $line ) {
 805                                 // Remove comment lines
 806                                 $comment = substr( trim( $line ), 0, 1 );
 807                                 if ( $comment == '#' || $comment == '' ) {
 808                                         continue;
 809                                 }
 810                                 // Remove additional comments after a prefix
 811                                 $comment = strpos( $line, '#' );
 812                                 if ( $comment > 0 ) {
 813                                         $line = substr( $line, 0, $comment-1 );
 814                                 }
 815                                 $blacklist[] = trim( $line );
 816                         }
 817                 }
 818                 return $blacklist;
 819         }
 820
 821         /**
 822          * Stash a file in a temporary directory for later processing
 823          * after the user has confirmed it.
 824          *
 825          * If the user doesn't explicitly cancel or accept, these files
 826          * can accumulate in the temp directory.
 827          *
 828          * @param string $saveName - the destination filename
 829          * @param string $tempName - the source temporary file to save
 830          * @return string - full path the stashed file, or false on failure
 831          * @access private
 832          */
 833         function saveTempUploadedFile( $saveName, $tempName ) {
 834                 global $wgOut;
 835                 $repo = RepoGroup::singleton()->getLocalRepo();
 836                 $status = $repo->storeTemp( $saveName, $tempName );
 837                 if ( !$status->isGood() ) {
 838                         $this->showError( $status->getWikiText() );
 839                         return false;
 840                 } else {
 841                         return $status->value;
 842                 }
 843         }
 844
 845         /**
 846          * Stash a file in a temporary directory for later processing,
 847          * and save the necessary descriptive info into the session.
 848          * Returns a key value which will be passed through a form
 849          * to pick up the path info on a later invocation.
 850          *
 851          * @return int
 852          * @access private
 853          */
 854         function stashSession() {
 855                 $stash = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath );
 856
 857                 if( !$stash ) {
 858                         # Couldn't save the file.
 859                         return false;
 860                 }
 861
 862                 $key = mt_rand( 0, 0x7fffffff );
 863                 $_SESSION['wsUploadData'][$key] = array(
 864                         'mTempPath'       => $stash,
 865                         'mFileSize'       => $this->mFileSize,
 866                         'mSrcName'        => $this->mSrcName,
 867                         'mFileProps'      => $this->mFileProps,
 868                         'version'         => self::SESSION_VERSION,
 869                 );
 870                 return $key;
 871         }
 872
 873         /**
 874          * Remove a temporarily kept file stashed by saveTempUploadedFile().
 875          * @access private
 876          * @return success
 877          */
 878         function unsaveUploadedFile() {
 879                 global $wgOut;
 880                 if( !$this->mTempPath ) return true; // nothing to delete
 881                 $repo = RepoGroup::singleton()->getLocalRepo();
 882                 $success = $repo->freeTemp( $this->mTempPath );
 883                 if ( ! $success ) {
 884                         $wgOut->showFileDeleteError( $this->mTempPath );
 885                         return false;
 886                 } else {
 887                         return true;
 888                 }
 889         }
 890
 891         /* -------------------------------------------------------------- */
 892
 893         /**
 894          * @param string $error as HTML
 895          * @access private
 896          */
 897         function uploadError( $error ) {
 898                 global $wgOut;
 899                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 900                 $wgOut->addHTML( '<span class="error">' . $error . '</span>' );
 901         }
 902
 903         /**
 904          * There's something wrong with this file, not enough to reject it
 905          * totally but we require manual intervention to save it for real.
 906          * Stash it away, then present a form asking to confirm or cancel.
 907          *
 908          * @param string $warning as HTML
 909          * @access private
 910          */
 911         function uploadWarning( $warning ) {
 912                 global $wgOut;
 913                 global $wgUseCopyrightUpload;
 914
 915                 $this->mSessionKey = $this->stashSession();
 916                 if( !$this->mSessionKey ) {
 917                         # Couldn't save file; an error has been displayed so let's go.
 918                         return;
 919                 }
 920
 921                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 922                 $wgOut->addHTML( '<ul class="warning">' . $warning . "</ul>\n" );
 923
 924                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
 925
 926                 if ( $wgUseCopyrightUpload ) {
 927                         $copyright = Xml::hidden( 'wpUploadCopyStatus', $this->mCopyrightStatus ) . "\n" .
 928                                         Xml::hidden( 'wpUploadSource', $this->mCopyrightSource ) . "\n";
 929                 } else {
 930                         $copyright = '';
 931                 }
 932
 933                 $wgOut->addHTML(
 934                         Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL( 'action=submit' ),
 935                                  'enctype' => 'multipart/form-data', 'id' => 'uploadwarning' ) ) . "\n" .
 936                         Xml::hidden( 'wpIgnoreWarning', '1' ) . "\n" .
 937                         Xml::hidden( 'wpSessionKey', $this->mSessionKey ) . "\n" .
 938                         Xml::hidden( 'wpUploadDescription', $this->mComment ) . "\n" .
 939                         Xml::hidden( 'wpLicense', $this->mLicense ) . "\n" .
 940                         Xml::hidden( 'wpDestFile', $this->mDesiredDestName ) . "\n" .
 941                         Xml::hidden( 'wpWatchthis', $this->mWatchthis ) . "\n" .
 942                         "{$copyright}<br />" .
 943                         Xml::submitButton( wfMsg( 'ignorewarning' ), array ( 'name' => 'wpUpload', 'id' => 'wpUpload', 'checked' => 'checked' ) ) . ' ' .
 944                         Xml::submitButton( wfMsg( 'reuploaddesc' ), array ( 'name' => 'wpReUpload', 'id' => 'wpReUpload' ) ) .
 945                         Xml::closeElement( 'form' ) . "\n"
 946                 );
 947         }
 948
 949         /**
 950          * Displays the main upload form, optionally with a highlighted
 951          * error message up at the top.
 952          *
 953          * @param string $msg as HTML
 954          * @access private
 955          */
 956         function mainUploadForm( $msg='' ) {
 957                 global $wgOut, $wgUser, $wgLang, $wgMaxUploadSize;
 958                 global $wgUseCopyrightUpload, $wgUseAjax, $wgAjaxUploadDestCheck, $wgAjaxLicensePreview;
 959                 global $wgRequest, $wgAllowCopyUploads;
 960                 global $wgStylePath, $wgStyleVersion;
 961
 962                 $useAjaxDestCheck = $wgUseAjax && $wgAjaxUploadDestCheck;
 963                 $useAjaxLicensePreview = $wgUseAjax && $wgAjaxLicensePreview;
 964
 965                 $adc = wfBoolToStr( $useAjaxDestCheck );
 966                 $alp = wfBoolToStr( $useAjaxLicensePreview );
 967                 $autofill = wfBoolToStr( $this->mDesiredDestName == '' );
 968
 969                 $wgOut->addScript( "<script type=\"text/javascript\">
 970 wgAjaxUploadDestCheck = {$adc};
 971 wgAjaxLicensePreview = {$alp};
 972 wgUploadAutoFill = {$autofill};
 973 </script>" );
 974                 $wgOut->addScriptFile( 'upload.js' );
 975                 $wgOut->addScriptFile( 'edit.js' ); // For <charinsert> support
 976
 977                 if( !wfRunHooks( 'UploadForm:initial', array( &$this ) ) )
 978                 {
 979                         wfDebug( "Hook 'UploadForm:initial' broke output of the upload form\n" );
 980                         return false;
 981                 }
 982
 983                 if( $this->mDesiredDestName ) {
 984                         $title = Title::makeTitleSafe( NS_FILE, $this->mDesiredDestName );
 985                         // Show a subtitle link to deleted revisions (to sysops et al only)
 986                         if( $title instanceof Title && ( $count = $title->isDeleted() ) > 0 && $wgUser->isAllowed( 'deletedhistory' ) ) {
 987                                 $link = wfMsgExt(
 988                                         $wgUser->isAllowed( 'delete' ) ? 'thisisdeleted' : 'viewdeleted',
 989                                         array( 'parse', 'replaceafter' ),
 990                                         $wgUser->getSkin()->makeKnownLinkObj(
 991                                                 SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedText() ),
 992                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $count )
 993                                         )
 994                                 );
 995                                 $wgOut->addHTML( "<div id=\"contentSub2\">{$link}</div>" );
 996                         }
 997
 998                         // Show the relevant lines from deletion log (for still deleted files only)
 999                         if( $title instanceof Title && $title->isDeletedQuick() && !$title->exists() ) {
1000                                 $this->showDeletionLog( $wgOut, $title->getPrefixedText() );
1001                         }
1002                 }
1003
1004                 $cols = intval($wgUser->getOption( 'cols' ));
1005
1006                 if( $wgUser->getOption( 'editwidth' ) ) {
1007                         $width = " style=\"width:100%\"";
1008                 } else {
1009                         $width = '';
1010                 }
1011
1012                 if ( '' != $msg ) {
1013                         $sub = wfMsgHtml( 'uploaderror' );
1014                         $wgOut->addHTML( "<h2>{$sub}</h2>\n" .
1015                           "<span class='error'>{$msg}</span>\n" );
1016                 }
1017                 $wgOut->addHTML( '<div id="uploadtext">' );
1018                 $wgOut->addWikiMsg( 'uploadtext', $this->mDesiredDestName );
1019                 $wgOut->addHTML( "</div>\n" );
1020
1021                 # Print a list of allowed file extensions, if so configured.  We ignore
1022                 # MIME type here, it's incomprehensible to most people and too long.
1023                 global $wgCheckFileExtensions, $wgStrictFileExtensions,
1024                 $wgFileExtensions, $wgFileBlacklist;
1025
1026                 $allowedExtensions = '';
1027                 if( $wgCheckFileExtensions ) {
1028                         if( $wgStrictFileExtensions ) {
1029                                 # Everything not permitted is banned
1030                                 $extensionsList =
1031                                         '<div id="mw-upload-permitted">' .
1032                                         wfMsgWikiHtml( 'upload-permitted', $wgLang->commaList( $wgFileExtensions ) ) .
1033                                         "</div>\n";
1034                         } else {
1035                                 # We have to list both preferred and prohibited
1036                                 $extensionsList =
1037                                         '<div id="mw-upload-preferred">' .
1038                                         wfMsgWikiHtml( 'upload-preferred', $wgLang->commaList( $wgFileExtensions ) ) .
1039                                         "</div>\n" .
1040                                         '<div id="mw-upload-prohibited">' .
1041                                         wfMsgWikiHtml( 'upload-prohibited', $wgLang->commaList( $wgFileBlacklist ) ) .
1042                                         "</div>\n";
1043                         }
1044                 } else {
1045                         # Everything is permitted.
1046                         $extensionsList = '';
1047                 }
1048
1049                 # Get the maximum file size from php.ini as $wgMaxUploadSize works for uploads from URL via CURL only
1050                 # See http://www.php.net/manual/en/ini.core.php#ini.upload-max-filesize for possible values of upload_max_filesize
1051                 $val = trim( ini_get( 'upload_max_filesize' ) );
1052                 $last = strtoupper( ( substr( $val, -1 ) ) );
1053                 switch( $last ) {
1054                         case 'G':
1055                                 $val2 = substr( $val, 0, -1 ) * 1024 * 1024 * 1024;
1056                                 break;
1057                         case 'M':
1058                                 $val2 = substr( $val, 0, -1 ) * 1024 * 1024;
1059                                 break;
1060                         case 'K':
1061                                 $val2 = substr( $val, 0, -1 ) * 1024;
1062                                 break;
1063                         default:
1064                                 $val2 = $val;
1065                 }
1066                 $val2 = $wgAllowCopyUploads ? min( $wgMaxUploadSize, $val2 ) : $val2;
1067                 $maxUploadSize = '<div id="mw-upload-maxfilesize">' .
1068                         wfMsgExt( 'upload-maxfilesize', array( 'parseinline', 'escapenoentities' ),
1069                                 $wgLang->formatSize( $val2 ) ) .
1070                                 "</div>\n";
1071
1072                 $sourcefilename = wfMsgExt( 'sourcefilename', array( 'parseinline', 'escapenoentities' ) );
1073         $destfilename = wfMsgExt( 'destfilename', array( 'parseinline', 'escapenoentities' ) );
1074
1075                 $msg = $this->mForReUpload ? 'filereuploadsummary' : 'fileuploadsummary';
1076                 $summary = wfMsgExt( $msg, '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() ? 'checked="checked"' : '';
1091                 # Re-uploads should not need "file exist already" warnings
1092                 $warningChecked = ($this->mIgnoreWarning || $this->mForReUpload) ? 'checked="checked"' : '';
1093
1094                 // Prepare form for upload or upload/copy
1095                 if( $wgAllowCopyUploads && $wgUser->isAllowed( 'upload_by_url' ) ) {
1096                         $filename_form =
1097                                 "<input type='radio' id='wpSourceTypeFile' name='wpSourceType' value='file' " .
1098                                    "onchange='toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\")' checked='checked' />" .
1099                                  "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1100                                    "onfocus='" .
1101                                      "toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\");" .
1102                                      "toggle_element_check(\"wpSourceTypeFile\",\"wpSourceTypeURL\")' " .
1103                                      "onchange='fillDestFilename(\"wpUploadFile\")' size='60' />" .
1104                                 wfMsgHTML( 'upload_source_file' ) . "<br/>" .
1105                                 "<input type='radio' id='wpSourceTypeURL' name='wpSourceType' value='web' " .
1106                                   "onchange='toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\")' />" .
1107                                 "<input tabindex='1' type='text' name='wpUploadFileURL' id='wpUploadFileURL' " .
1108                                   "onfocus='" .
1109                                     "toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\");" .
1110                                     "toggle_element_check(\"wpSourceTypeURL\",\"wpSourceTypeFile\")' " .
1111                                     "onchange='fillDestFilename(\"wpUploadFileURL\")' size='60' disabled='disabled' />" .
1112                                 wfMsgHtml( 'upload_source_url' ) ;
1113                 } else {
1114                         $filename_form =
1115                                 "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1116                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") .
1117                                 "size='60' />" .
1118                                 "<input type='hidden' name='wpSourceType' value='file' />" ;
1119                 }
1120                 if ( $useAjaxDestCheck ) {
1121                         $warningRow = "<tr><td colspan='2' id='wpDestFile-warning'>&nbsp;</td></tr>";
1122                         $destOnkeyup = 'onkeyup="wgUploadWarningObj.keypress();"';
1123                 } else {
1124                         $warningRow = '';
1125                         $destOnkeyup = '';
1126                 }
1127                 $encComment = htmlspecialchars( $this->mComment );
1128
1129
1130                 $wgOut->addHTML(
1131                          Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL(),
1132                                  'enctype' => 'multipart/form-data', 'id' => 'mw-upload-form' ) ) .
1133                          Xml::openElement( 'fieldset' ) .
1134                          Xml::element( 'legend', null, wfMsg( 'upload' ) ) .
1135                          Xml::openElement( 'table', array( 'border' => '0', 'id' => 'mw-upload-table' ) ) .
1136                          "<tr>
1137                                 {$this->uploadFormTextTop}
1138                                 <td class='mw-label'>
1139                                         <label for='wpUploadFile'>{$sourcefilename}</label>
1140                                 </td>
1141                                 <td class='mw-input'>
1142                                         {$filename_form}
1143                                 </td>
1144                         </tr>
1145                         <tr>
1146                                 <td></td>
1147                                 <td>
1148                                         {$maxUploadSize}
1149                                         {$extensionsList}
1150                                 </td>
1151                         </tr>
1152                         <tr>
1153                                 <td class='mw-label'>
1154                                         <label for='wpDestFile'>{$destfilename}</label>
1155                                 </td>
1156                                 <td class='mw-input'>"
1157                 );
1158                 if( $this->mForReUpload ) {
1159                         $wgOut->addHTML(
1160                                 Xml::hidden( 'wpDestFile', $this->mDesiredDestName, array('id'=>'wpDestFile','tabindex'=>2) ) .
1161                                 "<tt>" .
1162                                 $encDestName .
1163                                 "</tt>"
1164                         );
1165                 }
1166                 else {
1167                         $wgOut->addHTML(
1168                                 "<input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='60'
1169                                                 value=\"{$encDestName}\" onchange='toggleFilenameFiller()' $destOnkeyup />"
1170                         );
1171                 }
1172
1173
1174                 $wgOut->addHTML(
1175                                 "</td>
1176                         </tr>
1177                         <tr>
1178                                 <td class='mw-label'>
1179                                         <label for='wpUploadDescription'>{$summary}</label>
1180                                 </td>
1181                                 <td class='mw-input'>
1182                                         <textarea tabindex='3' name='wpUploadDescription' id='wpUploadDescription' rows='6'
1183                                                 cols='{$cols}'{$width}>$encComment</textarea>
1184                                         {$this->uploadFormTextAfterSummary}
1185                                 </td>
1186                         </tr>
1187                         <tr>"
1188                 );
1189                 # Re-uploads should not need license info
1190                 if ( !$this->mForReUpload && $licenseshtml != '' ) {
1191                         global $wgStylePath;
1192                         $wgOut->addHTML( "
1193                                         <td class='mw-label'>
1194                                                 <label for='wpLicense'>$license</label>
1195                                         </td>
1196                                         <td class='mw-input'>
1197                                                 <select name='wpLicense' id='wpLicense' tabindex='4'
1198                                                         onchange='licenseSelectorCheck()'>
1199                                                         <option value=''>$nolicense</option>
1200                                                         $licenseshtml
1201                                                 </select>
1202                                         </td>
1203                                 </tr>
1204                                 <tr>"
1205                         );
1206                         if( $useAjaxLicensePreview ) {
1207                                 $wgOut->addHTML( "
1208                                                 <td></td>
1209                                                 <td id=\"mw-license-preview\"></td>
1210                                         </tr>
1211                                         <tr>"
1212                                 );
1213                         }
1214                 }
1215
1216                 if ( !$this->mForReUpload && $wgUseCopyrightUpload ) {
1217                         $filestatus = wfMsgExt( 'filestatus', 'escapenoentities' );
1218                         $copystatus =  htmlspecialchars( $this->mCopyrightStatus );
1219                         $filesource = wfMsgExt( 'filesource', 'escapenoentities' );
1220                         $uploadsource = htmlspecialchars( $this->mCopyrightSource );
1221
1222                         $wgOut->addHTML( "
1223                                         <td class='mw-label' style='white-space: nowrap;'>
1224                                                 <label for='wpUploadCopyStatus'>$filestatus</label></td>
1225                                         <td class='mw-input'>
1226                                                 <input tabindex='5' type='text' name='wpUploadCopyStatus' id='wpUploadCopyStatus'
1227                                                         value=\"$copystatus\" size='60' />
1228                                         </td>
1229                                 </tr>
1230                                 <tr>
1231                                         <td class='mw-label'>
1232                                                 <label for='wpUploadCopyStatus'>$filesource</label>
1233                                         </td>
1234                                         <td class='mw-input'>
1235                                                 <input tabindex='6' type='text' name='wpUploadSource' id='wpUploadCopyStatus'
1236                                                         value=\"$uploadsource\" size='60' />
1237                                         </td>
1238                                 </tr>
1239                                 <tr>"
1240                         );
1241                 }
1242
1243                 $wgOut->addHTML( "
1244                                 <td></td>
1245                                 <td>
1246                                         <input tabindex='7' type='checkbox' name='wpWatchthis' id='wpWatchthis' $watchChecked value='true' />
1247                                         <label for='wpWatchthis'>" . wfMsgHtml( 'watchthisupload' ) . "</label>
1248                                         <input tabindex='8' type='checkbox' name='wpIgnoreWarning' id='wpIgnoreWarning' value='true' $warningChecked />
1249                                         <label for='wpIgnoreWarning'>" . wfMsgHtml( 'ignorewarnings' ) . "</label>
1250                                 </td>
1251                         </tr>
1252                         $warningRow
1253                         <tr>
1254                                 <td></td>
1255                                         <td class='mw-input'>
1256                                                 <input tabindex='9' type='submit' name='wpUpload' value=\"{$ulb}\"" .
1257                                                         $wgUser->getSkin()->tooltipAndAccesskey( 'upload' ) . " />
1258                                         </td>
1259                         </tr>
1260                         <tr>
1261                                 <td></td>
1262                                 <td class='mw-input'>"
1263                 );
1264                 $wgOut->addHTML( '<div class="mw-editTools">' );
1265                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1266                 $wgOut->addHTML( '</div>' );
1267                 $wgOut->addHTML( "
1268                                 </td>
1269                         </tr>" .
1270                         Xml::closeElement( 'table' ) .
1271                         Xml::hidden( 'wpDestFileWarningAck', '', array( 'id' => 'wpDestFileWarningAck' ) ) .
1272                         Xml::hidden( 'wpForReUpload', $this->mForReUpload, array( 'id' => 'wpForReUpload' ) ) .
1273                         Xml::closeElement( 'fieldset' ) .
1274                         Xml::closeElement( 'form' )
1275                 );
1276                 $uploadfooter = wfMsgNoTrans( 'uploadfooter' );
1277                 if( $uploadfooter != '-' && !wfEmptyMsg( 'uploadfooter', $uploadfooter ) ){
1278                         $wgOut->addWikiText( '<div id="mw-upload-footer-message">' . $uploadfooter . '</div>' );
1279                 }
1280         }
1281
1282         /* -------------------------------------------------------------- */
1283
1284         /**
1285          * See if we should check the 'watch this page' checkbox on the form
1286          * based on the user's preferences and whether we're being asked
1287          * to create a new file or update an existing one.
1288          *
1289          * In the case where 'watch edits' is off but 'watch creations' is on,
1290          * we'll leave the box unchecked.
1291          *
1292          * Note that the page target can be changed *on the form*, so our check
1293          * state can get out of sync.
1294          */
1295         function watchCheck() {
1296                 global $wgUser;
1297                 if( $wgUser->getOption( 'watchdefault' ) ) {
1298                         // Watch all edits!
1299                         return true;
1300                 }
1301
1302                 $local = wfLocalFile( $this->mDesiredDestName );
1303                 if( $local && $local->exists() ) {
1304                         // We're uploading a new version of an existing file.
1305                         // No creation, so don't watch it if we're not already.
1306                         return $local->getTitle()->userIsWatching();
1307                 } else {
1308                         // New page should get watched if that's our option.
1309                         return $wgUser->getOption( 'watchcreations' );
1310                 }
1311         }
1312
1313         /**
1314          * Split a file into a base name and all dot-delimited 'extensions'
1315          * on the end. Some web server configurations will fall back to
1316          * earlier pseudo-'extensions' to determine type and execute
1317          * scripts, so the blacklist needs to check them all.
1318          *
1319          * @return array
1320          */
1321         public function splitExtensions( $filename ) {
1322                 $bits = explode( '.', $filename );
1323                 $basename = array_shift( $bits );
1324                 return array( $basename, $bits );
1325         }
1326
1327         /**
1328          * Perform case-insensitive match against a list of file extensions.
1329          * Returns true if the extension is in the list.
1330          *
1331          * @param string $ext
1332          * @param array $list
1333          * @return bool
1334          */
1335         function checkFileExtension( $ext, $list ) {
1336                 return in_array( strtolower( $ext ), $list );
1337         }
1338
1339         /**
1340          * Perform case-insensitive match against a list of file extensions.
1341          * Returns true if any of the extensions are in the list.
1342          *
1343          * @param array $ext
1344          * @param array $list
1345          * @return bool
1346          */
1347         public function checkFileExtensionList( $ext, $list ) {
1348                 foreach( $ext as $e ) {
1349                         if( in_array( strtolower( $e ), $list ) ) {
1350                                 return true;
1351                         }
1352                 }
1353                 return false;
1354         }
1355
1356         /**
1357          * Verifies that it's ok to include the uploaded file
1358          *
1359          * @param string $tmpfile the full path of the temporary file to verify
1360          * @param string $extension The filename extension that the file is to be served with
1361          * @return mixed true of the file is verified, a WikiError object otherwise.
1362          */
1363         function verify( $tmpfile, $extension ) {
1364                 #magically determine mime type
1365                 $magic = MimeMagic::singleton();
1366                 $mime = $magic->guessMimeType($tmpfile,false);
1367
1368
1369                 #check mime type, if desired
1370                 global $wgVerifyMimeType;
1371                 if ($wgVerifyMimeType) {
1372                         wfDebug ( "\n\nmime: <$mime> extension: <$extension>\n\n");
1373                         #check mime type against file extension
1374                         if( !self::verifyExtension( $mime, $extension ) ) {
1375                                 return new WikiErrorMsg( 'uploadcorrupt' );
1376                         }
1377
1378                         #check mime type blacklist
1379                         global $wgMimeTypeBlacklist;
1380                         if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist) ) {
1381                                 if ( $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
1382                                         return new WikiErrorMsg( 'filetype-badmime', htmlspecialchars( $mime ) );
1383                                 }
1384
1385                                 # Check IE type
1386                                 $fp = fopen( $tmpfile, 'rb' );
1387                                 $chunk = fread( $fp, 256 );
1388                                 fclose( $fp );
1389                                 $extMime = $magic->guessTypesForExtension( $extension );
1390                                 $ieTypes = $magic->getIEMimeTypes( $tmpfile, $chunk, $extMime );
1391                                 foreach ( $ieTypes as $ieType ) {
1392                                         if ( $this->checkFileExtension( $ieType, $wgMimeTypeBlacklist ) ) {
1393                                                 return new WikiErrorMsg( 'filetype-bad-ie-mime', $ieType );
1394                                         }
1395                                 }
1396                         }
1397                 }
1398
1399                 #check for htmlish code and javascript
1400                 if( $this->detectScript ( $tmpfile, $mime, $extension ) ) {
1401                         return new WikiErrorMsg( 'uploadscripted' );
1402                 }
1403                 if( $extension == 'svg' || $mime == 'image/svg+xml' ) {
1404                         if( $this->detectScriptInSvg( $tmpfile ) ) {
1405                                 return new WikiErrorMsg( 'uploadscripted' );
1406                         }
1407                 }
1408
1409                 /**
1410                 * Scan the uploaded file for viruses
1411                 */
1412                 $virus= $this->detectVirus($tmpfile);
1413                 if ( $virus ) {
1414                         return new WikiErrorMsg( 'uploadvirus', htmlspecialchars($virus) );
1415                 }
1416
1417                 wfDebug( __METHOD__.": all clear; passing.\n" );
1418                 return true;
1419         }
1420
1421         /**
1422          * Checks if the mime type of the uploaded file matches the file extension.
1423          *
1424          * @param string $mime the mime type of the uploaded file
1425          * @param string $extension The filename extension that the file is to be served with
1426          * @return bool
1427          */
1428         static function verifyExtension( $mime, $extension ) {
1429                 $magic = MimeMagic::singleton();
1430
1431                 if ( ! $mime || $mime == 'unknown' || $mime == 'unknown/unknown' )
1432                         if ( ! $magic->isRecognizableExtension( $extension ) ) {
1433                                 wfDebug( __METHOD__.": passing file with unknown detected mime type; " .
1434                                         "unrecognized extension '$extension', can't verify\n" );
1435                                 return true;
1436                         } else {
1437                                 wfDebug( __METHOD__.": rejecting file with unknown detected mime type; ".
1438                                         "recognized extension '$extension', so probably invalid file\n" );
1439                                 return false;
1440                         }
1441
1442                 $match= $magic->isMatchingExtension($extension,$mime);
1443
1444                 if ($match===NULL) {
1445                         wfDebug( __METHOD__.": no file extension known for mime type $mime, passing file\n" );
1446                         return true;
1447                 } elseif ($match===true) {
1448                         wfDebug( __METHOD__.": mime type $mime matches extension $extension, passing file\n" );
1449
1450                         #TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
1451                         return true;
1452
1453                 } else {
1454                         wfDebug( __METHOD__.": mime type $mime mismatches file extension $extension, rejecting file\n" );
1455                         return false;
1456                 }
1457         }
1458
1459
1460         /**
1461          * Heuristic for detecting files that *could* contain JavaScript instructions or
1462          * things that may look like HTML to a browser and are thus
1463          * potentially harmful. The present implementation will produce false positives in some situations.
1464          *
1465          * @param string $file Pathname to the temporary upload file
1466          * @param string $mime The mime type of the file
1467          * @param string $extension The extension of the file
1468          * @return bool true if the file contains something looking like embedded scripts
1469          */
1470         function detectScript($file, $mime, $extension) {
1471                 global $wgAllowTitlesInSVG;
1472
1473                 #ugly hack: for text files, always look at the entire file.
1474                 #For binarie field, just check the first K.
1475
1476                 if (strpos($mime,'text/')===0) $chunk = file_get_contents( $file );
1477                 else {
1478                         $fp = fopen( $file, 'rb' );
1479                         $chunk = fread( $fp, 1024 );
1480                         fclose( $fp );
1481                 }
1482
1483                 $chunk= strtolower( $chunk );
1484
1485                 if (!$chunk) return false;
1486
1487                 #decode from UTF-16 if needed (could be used for obfuscation).
1488                 if (substr($chunk,0,2)=="\xfe\xff") $enc= "UTF-16BE";
1489                 elseif (substr($chunk,0,2)=="\xff\xfe") $enc= "UTF-16LE";
1490                 else $enc= NULL;
1491
1492                 if ($enc) $chunk= iconv($enc,"ASCII//IGNORE",$chunk);
1493
1494                 $chunk= trim($chunk);
1495
1496                 #FIXME: convert from UTF-16 if necessarry!
1497
1498                 wfDebug("SpecialUpload::detectScript: checking for embedded scripts and HTML stuff\n");
1499
1500                 #check for HTML doctype
1501                 if (eregi("<!DOCTYPE *X?HTML",$chunk)) return true;
1502
1503                 /**
1504                 * Internet Explorer for Windows performs some really stupid file type
1505                 * autodetection which can cause it to interpret valid image files as HTML
1506                 * and potentially execute JavaScript, creating a cross-site scripting
1507                 * attack vectors.
1508                 *
1509                 * Apple's Safari browser also performs some unsafe file type autodetection
1510                 * which can cause legitimate files to be interpreted as HTML if the
1511                 * web server is not correctly configured to send the right content-type
1512                 * (or if you're really uploading plain text and octet streams!)
1513                 *
1514                 * Returns true if IE is likely to mistake the given file for HTML.
1515                 * Also returns true if Safari would mistake the given file for HTML
1516                 * when served with a generic content-type.
1517                 */
1518
1519                 $tags = array(
1520                         '<a href',
1521                         '<body',
1522                         '<head',
1523                         '<html',   #also in safari
1524                         '<img',
1525                         '<pre',
1526                         '<script', #also in safari
1527                         '<table'
1528                         );
1529                 if( ! $wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
1530                         $tags[] = '<title';
1531                 }
1532
1533                 foreach( $tags as $tag ) {
1534                         if( false !== strpos( $chunk, $tag ) ) {
1535                                 return true;
1536                         }
1537                 }
1538
1539                 /*
1540                 * look for javascript
1541                 */
1542
1543                 #resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1544                 $chunk = Sanitizer::decodeCharReferences( $chunk );
1545
1546                 #look for script-types
1547                 if (preg_match('!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim',$chunk)) return true;
1548
1549                 #look for html-style script-urls
1550                 if (preg_match('!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1551
1552                 #look for css-style script-urls
1553                 if (preg_match('!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1554
1555                 wfDebug("SpecialUpload::detectScript: no scripts found\n");
1556                 return false;
1557         }
1558
1559         function detectScriptInSvg( $filename ) {
1560                 $check = new XmlTypeCheck( $filename, array( $this, 'checkSvgScriptCallback' ) );
1561                 return $check->filterMatch;
1562         }
1563
1564         /**
1565          * @todo Replace this with a whitelist filter!
1566          */
1567         function checkSvgScriptCallback( $element, $attribs ) {
1568                 $stripped = $this->stripXmlNamespace( $element );
1569
1570                 if( $stripped == 'script' ) {
1571                         wfDebug( __METHOD__ . ": Found script element '$element' in uploaded file.\n" );
1572                         return true;
1573                 }
1574
1575                 foreach( $attribs as $attrib => $value ) {
1576                         $stripped = $this->stripXmlNamespace( $attrib );
1577                         if( substr( $stripped, 0, 2 ) == 'on' ) {
1578                                 wfDebug( __METHOD__ . ": Found script attribute '$attrib'='value' in uploaded file.\n" );
1579                                 return true;
1580                         }
1581                         if( $stripped == 'href' && strpos( strtolower( $value ), 'javascript:' ) !== false ) {
1582                                 wfDebug( __METHOD__ . ": Found script href attribute '$attrib'='$value' in uploaded file.\n" );
1583                                 return true;
1584                         }
1585                 }
1586         }
1587
1588         private function stripXmlNamespace( $name ) {
1589                 // 'http://www.w3.org/2000/svg:script' -> 'script'
1590                 $parts = explode( ':', strtolower( $name ) );
1591                 return array_pop( $parts );
1592         }
1593
1594         /**
1595          * Generic wrapper function for a virus scanner program.
1596          * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
1597          * $wgAntivirusRequired may be used to deny upload if the scan fails.
1598          *
1599          * @param string $file Pathname to the temporary upload file
1600          * @return mixed false if not virus is found, NULL if the scan fails or is disabled,
1601          *         or a string containing feedback from the virus scanner if a virus was found.
1602          *         If textual feedback is missing but a virus was found, this function returns true.
1603          */
1604         function detectVirus($file) {
1605                 global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
1606
1607                 if ( !$wgAntivirus ) {
1608                         wfDebug( __METHOD__.": virus scanner disabled\n");
1609                         return NULL;
1610                 }
1611
1612                 if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1613                         wfDebug( __METHOD__.": unknown virus scanner: $wgAntivirus\n" );
1614                         $wgOut->wrapWikiMsg( '<div class="error">$1</div>', array( 'virus-badscanner', $wgAntivirus ) );
1615                         return wfMsg('virus-unknownscanner') . " $wgAntivirus";
1616                 }
1617
1618                 # look up scanner configuration
1619                 $command = $wgAntivirusSetup[$wgAntivirus]["command"];
1620                 $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]["codemap"];
1621                 $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]["messagepattern"] ) ?
1622                         $wgAntivirusSetup[$wgAntivirus]["messagepattern"] : null;
1623
1624                 if ( strpos( $command,"%f" ) === false ) {
1625                         # simple pattern: append file to scan
1626                         $command .= " " . wfEscapeShellArg( $file );
1627                 } else {
1628                         # complex pattern: replace "%f" with file to scan
1629                         $command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
1630                 }
1631
1632                 wfDebug( __METHOD__.": running virus scan: $command \n" );
1633
1634                 # execute virus scanner
1635                 $exitCode = false;
1636
1637                 #NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1638                 #      that does not seem to be worth the pain.
1639                 #      Ask me (Duesentrieb) about it if it's ever needed.
1640                 $output = array();
1641                 if ( wfIsWindows() ) {
1642                         exec( "$command", $output, $exitCode );
1643                 } else {
1644                         exec( "$command 2>&1", $output, $exitCode );
1645                 }
1646
1647                 # map exit code to AV_xxx constants.
1648                 $mappedCode = $exitCode;
1649                 if ( $exitCodeMap ) {
1650                         if ( isset( $exitCodeMap[$exitCode] ) ) {
1651                                 $mappedCode = $exitCodeMap[$exitCode];
1652                         } elseif ( isset( $exitCodeMap["*"] ) ) {
1653                                 $mappedCode = $exitCodeMap["*"];
1654                         }
1655                 }
1656
1657                 if ( $mappedCode === AV_SCAN_FAILED ) {
1658                         # scan failed (code was mapped to false by $exitCodeMap)
1659                         wfDebug( __METHOD__.": failed to scan $file (code $exitCode).\n" );
1660
1661                         if ( $wgAntivirusRequired ) {
1662                                 return wfMsg('virus-scanfailed', array( $exitCode ) );
1663                         } else {
1664                                 return NULL;
1665                         }
1666                 } else if ( $mappedCode === AV_SCAN_ABORTED ) {
1667                         # scan failed because filetype is unknown (probably imune)
1668                         wfDebug( __METHOD__.": unsupported file type $file (code $exitCode).\n" );
1669                         return NULL;
1670                 } else if ( $mappedCode === AV_NO_VIRUS ) {
1671                         # no virus found
1672                         wfDebug( __METHOD__.": file passed virus scan.\n" );
1673                         return false;
1674                 } else {
1675                         $output = join( "\n", $output );
1676                         $output = trim( $output );
1677
1678                         if ( !$output ) {
1679                                 $output = true; #if there's no output, return true
1680                         } elseif ( $msgPattern ) {
1681                                 $groups = array();
1682                                 if ( preg_match( $msgPattern, $output, $groups ) ) {
1683                                         if ( $groups[1] ) {
1684                                                 $output = $groups[1];
1685                                         }
1686                                 }
1687                         }
1688
1689                         wfDebug( __METHOD__.": FOUND VIRUS! scanner feedback: $output \n" );
1690                         return $output;
1691                 }
1692         }
1693
1694         /**
1695          * Check if the temporary file is MacBinary-encoded, as some uploads
1696          * from Internet Explorer on Mac OS Classic and Mac OS X will be.
1697          * If so, the data fork will be extracted to a second temporary file,
1698          * which will then be checked for validity and either kept or discarded.
1699          *
1700          * @access private
1701          */
1702         function checkMacBinary() {
1703                 $macbin = new MacBinary( $this->mTempPath );
1704                 if( $macbin->isValid() ) {
1705                         $dataFile = tempnam( wfTempDir(), "WikiMacBinary" );
1706                         $dataHandle = fopen( $dataFile, 'wb' );
1707
1708                         wfDebug( "SpecialUpload::checkMacBinary: Extracting MacBinary data fork to $dataFile\n" );
1709                         $macbin->extractData( $dataHandle );
1710
1711                         $this->mTempPath = $dataFile;
1712                         $this->mFileSize = $macbin->dataForkLength();
1713
1714                         // We'll have to manually remove the new file if it's not kept.
1715                         $this->mRemoveTempFile = true;
1716                 }
1717                 $macbin->close();
1718         }
1719
1720         /**
1721          * If we've modified the upload file we need to manually remove it
1722          * on exit to clean up.
1723          * @access private
1724          */
1725         function cleanupTempFile() {
1726                 if ( $this->mRemoveTempFile && $this->mTempPath && file_exists( $this->mTempPath ) ) {
1727                         wfDebug( "SpecialUpload::cleanupTempFile: Removing temporary file {$this->mTempPath}\n" );
1728                         unlink( $this->mTempPath );
1729                 }
1730         }
1731
1732         /**
1733          * Check if there's an overwrite conflict and, if so, if restrictions
1734          * forbid this user from performing the upload.
1735          *
1736          * @return mixed true on success, WikiError on failure
1737          * @access private
1738          */
1739         function checkOverwrite( $name ) {
1740                 $img = wfFindFile( $name );
1741
1742                 $error = '';
1743                 if( $img ) {
1744                         global $wgUser, $wgOut;
1745                         if( $img->isLocal() ) {
1746                                 if( !self::userCanReUpload( $wgUser, $img->name ) ) {
1747                                         $error = 'fileexists-forbidden';
1748                                 }
1749                         } else {
1750                                 if( !$wgUser->isAllowed( 'reupload' ) ||
1751                                     !$wgUser->isAllowed( 'reupload-shared' ) ) {
1752                                         $error = "fileexists-shared-forbidden";
1753                                 }
1754                         }
1755                 }
1756
1757                 if( $error ) {
1758                         $errorText = wfMsg( $error, wfEscapeWikiText( $img->getName() ) );
1759                         return $errorText;
1760                 }
1761
1762                 // Rockin', go ahead and upload
1763                 return true;
1764         }
1765
1766          /**
1767          * Check if a user is the last uploader
1768          *
1769          * @param User $user
1770          * @param string $img, image name
1771          * @return bool
1772          */
1773         public static function userCanReUpload( User $user, $img ) {
1774                 if( $user->isAllowed( 'reupload' ) )
1775                         return true; // non-conditional
1776                 if( !$user->isAllowed( 'reupload-own' ) )
1777                         return false;
1778
1779                 $dbr = wfGetDB( DB_SLAVE );
1780                 $row = $dbr->selectRow('image',
1781                 /* SELECT */ 'img_user',
1782                 /* WHERE */ array( 'img_name' => $img )
1783                 );
1784                 if ( !$row )
1785                         return false;
1786
1787                 return $user->getId() == $row->img_user;
1788         }
1789
1790         /**
1791          * Display an error with a wikitext description
1792          */
1793         function showError( $description ) {
1794                 global $wgOut;
1795                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
1796                 $wgOut->setRobotPolicy( "noindex,nofollow" );
1797                 $wgOut->setArticleRelated( false );
1798                 $wgOut->enableClientCache( false );
1799                 $wgOut->addWikiText( $description );
1800         }
1801
1802         /**
1803          * Get the initial image page text based on a comment and optional file status information
1804          */
1805         static function getInitialPageText( $comment, $license, $copyStatus, $source ) {
1806                 global $wgUseCopyrightUpload;
1807                 if ( $wgUseCopyrightUpload ) {
1808                         if ( $license != '' ) {
1809                                 $licensetxt = '== ' . wfMsgForContent( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1810                         }
1811                         $pageText = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n" .
1812                           '== ' . wfMsgForContent ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
1813                           "$licensetxt" .
1814                           '== ' . wfMsgForContent ( 'filesource' ) . " ==\n" . $source ;
1815                 } else {
1816                         if ( $license != '' ) {
1817                                 $filedesc = $comment == '' ? '' : '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n";
1818                                  $pageText = $filedesc .
1819                                          '== ' . wfMsgForContent ( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1820                         } else {
1821                                 $pageText = $comment;
1822                         }
1823                 }
1824                 return $pageText;
1825         }
1826
1827         /**
1828          * If there are rows in the deletion log for this file, show them,
1829          * along with a nice little note for the user
1830          *
1831          * @param OutputPage $out
1832          * @param string filename
1833          */
1834         private function showDeletionLog( $out, $filename ) {
1835                 global $wgUser;
1836                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
1837                 $pager = new LogPager( $loglist, 'delete', false, $filename );
1838                 if( $pager->getNumRows() > 0 ) {
1839                         $out->addHTML( '<div class="mw-warning-with-logexcerpt">' );
1840                         $out->addWikiMsg( 'upload-wasdeleted' );
1841                         $out->addHTML(
1842                                 $loglist->beginLogEventsList() .
1843                                 $pager->getBody() .
1844                                 $loglist->endLogEventsList()
1845                         );
1846                         $out->addHTML( '</div>' );
1847                 }
1848         }
1849 }