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->mReUpload          = $request->getCheck( 'wpReUpload' );
  66
  67                 if( !$request->wasPosted() ) {
  68                         # GET requests just give the main form; no data except destination
  69                         # filename and description
  70                         return;
  71                 }
  72
  73                 # Placeholders for text injection by hooks (empty per default)
  74                 $this->uploadFormTextTop = "";
  75                 $this->uploadFormTextAfterSummary = "";
  76
  77                 $this->mReUpload          = $request->getCheck( 'wpReUpload' );
  78                 $this->mUploadClicked     = $request->getCheck( 'wpUpload' );
  79
  80                 $this->mLicense           = $request->getText( 'wpLicense' );
  81                 $this->mCopyrightStatus   = $request->getText( 'wpUploadCopyStatus' );
  82                 $this->mCopyrightSource   = $request->getText( 'wpUploadSource' );
  83                 $this->mWatchthis         = $request->getBool( 'wpWatchthis' );
  84                 $this->mSourceType        = $request->getText( 'wpSourceType' );
  85                 $this->mDestWarningAck    = $request->getText( 'wpDestFileWarningAck' );
  86
  87                 $this->mAction            = $request->getVal( 'action' );
  88
  89                 $this->mSessionKey        = $request->getInt( 'wpSessionKey' );
  90                 if( !empty( $this->mSessionKey ) &&
  91                         isset( $_SESSION['wsUploadData'][$this->mSessionKey]['version'] ) &&
  92                         $_SESSION['wsUploadData'][$this->mSessionKey]['version'] == self::SESSION_VERSION ) {
  93                         /**
  94                          * Confirming a temporarily stashed upload.
  95                          * We don't want path names to be forged, so we keep
  96                          * them in the session on the server and just give
  97                          * an opaque key to the user agent.
  98                          */
  99                         $data = $_SESSION['wsUploadData'][$this->mSessionKey];
 100                         $this->mTempPath         = $data['mTempPath'];
 101                         $this->mFileSize         = $data['mFileSize'];
 102                         $this->mSrcName          = $data['mSrcName'];
 103                         $this->mFileProps        = $data['mFileProps'];
 104                         $this->mCurlError        = 0/*UPLOAD_ERR_OK*/;
 105                         $this->mStashed          = true;
 106                         $this->mRemoveTempFile   = false;
 107                 } else {
 108                         /**
 109                          *Check for a newly uploaded file.
 110                          */
 111                         if( $wgAllowCopyUploads && $this->mSourceType == 'web' ) {
 112                                 $this->initializeFromUrl( $request );
 113                         } else {
 114                                 $this->initializeFromUpload( $request );
 115                         }
 116                 }
 117         }
 118
 119         /**
 120          * Initialize the uploaded file from PHP data
 121          * @access private
 122          */
 123         function initializeFromUpload( $request ) {
 124                 $this->mTempPath       = $request->getFileTempName( 'wpUploadFile' );
 125                 $this->mFileSize       = $request->getFileSize( 'wpUploadFile' );
 126                 $this->mSrcName        = $request->getFileName( 'wpUploadFile' );
 127                 $this->mCurlError      = $request->getUploadError( 'wpUploadFile' );
 128                 $this->mSessionKey     = false;
 129                 $this->mStashed        = false;
 130                 $this->mRemoveTempFile = false; // PHP will handle this
 131         }
 132
 133         /**
 134          * Copy a web file to a temporary file
 135          * @access private
 136          */
 137         function initializeFromUrl( $request ) {
 138                 global $wgTmpDirectory;
 139                 $url = $request->getText( 'wpUploadFileURL' );
 140                 $local_file = tempnam( $wgTmpDirectory, 'WEBUPLOAD' );
 141
 142                 $this->mTempPath       = $local_file;
 143                 $this->mFileSize       = 0; # Will be set by curlCopy
 144                 $this->mCurlError      = $this->curlCopy( $url, $local_file );
 145                 $pathParts             = explode( '/', $url );
 146                 $this->mSrcName        = array_pop( $pathParts );
 147                 $this->mSessionKey     = false;
 148                 $this->mStashed        = false;
 149
 150                 // PHP won't auto-cleanup the file
 151                 $this->mRemoveTempFile = file_exists( $local_file );
 152         }
 153
 154         /**
 155          * Safe copy from URL
 156          * Returns true if there was an error, false otherwise
 157          */
 158         private function curlCopy( $url, $dest ) {
 159                 global $wgUser, $wgOut;
 160
 161                 if( !$wgUser->isAllowed( 'upload_by_url' ) ) {
 162                         $wgOut->permissionRequired( 'upload_by_url' );
 163                         return true;
 164                 }
 165
 166                 # Maybe remove some pasting blanks :-)
 167                 $url =  trim( $url );
 168                 if( stripos($url, 'http://') !== 0 && stripos($url, 'ftp://') !== 0 ) {
 169                         # Only HTTP or FTP URLs
 170                         $wgOut->showErrorPage( 'upload-proto-error', 'upload-proto-error-text' );
 171                         return true;
 172                 }
 173
 174                 # Open temporary file
 175                 $this->mCurlDestHandle = @fopen( $this->mTempPath, "wb" );
 176                 if( $this->mCurlDestHandle === false ) {
 177                         # Could not open temporary file to write in
 178                         $wgOut->showErrorPage( 'upload-file-error', 'upload-file-error-text');
 179                         return true;
 180                 }
 181
 182                 $ch = curl_init();
 183                 curl_setopt( $ch, CURLOPT_HTTP_VERSION, 1.0); # Probably not needed, but apparently can work around some bug
 184                 curl_setopt( $ch, CURLOPT_TIMEOUT, 10); # 10 seconds timeout
 185                 curl_setopt( $ch, CURLOPT_LOW_SPEED_LIMIT, 512); # 0.5KB per second minimum transfer speed
 186                 curl_setopt( $ch, CURLOPT_URL, $url);
 187                 curl_setopt( $ch, CURLOPT_WRITEFUNCTION, array( $this, 'uploadCurlCallback' ) );
 188                 curl_exec( $ch );
 189                 $error = curl_errno( $ch ) ? true : false;
 190                 $errornum =  curl_errno( $ch );
 191                 // if ( $error ) print curl_error ( $ch ) ; # Debugging output
 192                 curl_close( $ch );
 193
 194                 fclose( $this->mCurlDestHandle );
 195                 unset( $this->mCurlDestHandle );
 196                 if( $error ) {
 197                         unlink( $dest );
 198                         if( wfEmptyMsg( "upload-curl-error$errornum", wfMsg("upload-curl-error$errornum") ) )
 199                                 $wgOut->showErrorPage( 'upload-misc-error', 'upload-misc-error-text' );
 200                         else
 201                                 $wgOut->showErrorPage( "upload-curl-error$errornum", "upload-curl-error$errornum-text" );
 202                 }
 203
 204                 return $error;
 205         }
 206
 207         /**
 208          * Callback function for CURL-based web transfer
 209          * Write data to file unless we've passed the length limit;
 210          * if so, abort immediately.
 211          * @access private
 212          */
 213         function uploadCurlCallback( $ch, $data ) {
 214                 global $wgMaxUploadSize;
 215                 $length = strlen( $data );
 216                 $this->mFileSize += $length;
 217                 if( $this->mFileSize > $wgMaxUploadSize ) {
 218                         return 0;
 219                 }
 220                 fwrite( $this->mCurlDestHandle, $data );
 221                 return $length;
 222         }
 223
 224         /**
 225          * Start doing stuff
 226          * @access public
 227          */
 228         function execute() {
 229                 global $wgUser, $wgOut;
 230                 global $wgEnableUploads;
 231
 232                 # Check php's file_uploads setting
 233                 if( !wfIniGetBool( 'file_uploads' ) ) {
 234                         $wgOut->showErrorPage( 'uploaddisabled', 'php-uploaddisabledtext', array( $this->mDesiredDestName ) );
 235                         return;
 236                 }
 237
 238                 # Check uploading enabled
 239                 if( !$wgEnableUploads ) {
 240                         $wgOut->showErrorPage( 'uploaddisabled', 'uploaddisabledtext', array( $this->mDesiredDestName ) );
 241                         return;
 242                 }
 243
 244                 # Check permissions
 245                 if( !$wgUser->isAllowed( 'upload' ) ) {
 246                         if( !$wgUser->isLoggedIn() ) {
 247                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
 248                         } else {
 249                                 $wgOut->permissionRequired( 'upload' );
 250                         }
 251                         return;
 252                 }
 253
 254                 # Check blocks
 255                 if( $wgUser->isBlocked() ) {
 256                         $wgOut->blockedPage();
 257                         return;
 258                 }
 259
 260                 if( wfReadOnly() ) {
 261                         $wgOut->readOnlyPage();
 262                         return;
 263                 }
 264
 265                 if( $this->mReUpload ) {
 266                         if( !$this->unsaveUploadedFile() ) {
 267                                 return;
 268                         }
 269                         # Because it is probably checked and shouldn't be
 270                         $this->mIgnoreWarning = false;
 271
 272                         $this->mainUploadForm();
 273                 } else if( 'submit' == $this->mAction || $this->mUploadClicked ) {
 274                         $this->processUpload();
 275                 } else {
 276                         $this->mainUploadForm();
 277                 }
 278
 279                 $this->cleanupTempFile();
 280         }
 281
 282         /**
 283          * Do the upload
 284          * Checks are made in SpecialUpload::execute()
 285          *
 286          * @access private
 287          */
 288         function processUpload(){
 289                 global $wgUser, $wgOut, $wgFileExtensions, $wgLang;
 290                 $details = null;
 291                 $value = null;
 292                 $value = $this->internalProcessUpload( $details );
 293
 294                 switch($value) {
 295                         case self::SUCCESS:
 296                                 $wgOut->redirect( $this->mLocalFile->getTitle()->getFullURL() );
 297                                 break;
 298
 299                         case self::BEFORE_PROCESSING:
 300                                 break;
 301
 302                         case self::LARGE_FILE_SERVER:
 303                                 $this->mainUploadForm( wfMsgHtml( 'largefileserver' ) );
 304                                 break;
 305
 306                         case self::EMPTY_FILE:
 307                                 $this->mainUploadForm( wfMsgHtml( 'emptyfile' ) );
 308                                 break;
 309
 310                         case self::MIN_LENGTH_PARTNAME:
 311                                 $this->mainUploadForm( wfMsgHtml( 'minlength1' ) );
 312                                 break;
 313
 314                         case self::ILLEGAL_FILENAME:
 315                                 $filtered = $details['filtered'];
 316                                 $this->uploadError( wfMsgWikiHtml( 'illegalfilename', htmlspecialchars( $filtered ) ) );
 317                                 break;
 318
 319                         case self::PROTECTED_PAGE:
 320                                 $wgOut->showPermissionsErrorPage( $details['permissionserrors'] );
 321                                 break;
 322
 323                         case self::OVERWRITE_EXISTING_FILE:
 324                                 $errorText = $details['overwrite'];
 325                                 $this->uploadError( $wgOut->parse( $errorText ) );
 326                                 break;
 327
 328                         case self::FILETYPE_MISSING:
 329                                 $this->uploadError( wfMsgExt( 'filetype-missing', array ( 'parseinline' ) ) );
 330                                 break;
 331
 332                         case self::FILETYPE_BADTYPE:
 333                                 $finalExt = $details['finalExt'];
 334                                 $this->uploadError(
 335                                         wfMsgExt( 'filetype-banned-type',
 336                                                 array( 'parseinline' ),
 337                                                 htmlspecialchars( $finalExt ),
 338                                                 $wgLang->commaList( $wgFileExtensions ),
 339                                                 $wgLang->formatNum( count($wgFileExtensions) )
 340                                         )
 341                                 );
 342                                 break;
 343
 344                         case self::VERIFICATION_ERROR:
 345                                 $veri = $details['veri'];
 346                                 $this->uploadError( $veri->toString() );
 347                                 break;
 348
 349                         case self::UPLOAD_VERIFICATION_ERROR:
 350                                 $error = $details['error'];
 351                                 $this->uploadError( $error );
 352                                 break;
 353
 354                         case self::UPLOAD_WARNING:
 355                                 $warning = $details['warning'];
 356                                 $this->uploadWarning( $warning );
 357                                 break;
 358
 359                         case self::INTERNAL_ERROR:
 360                                 $internal = $details['internal'];
 361                                 $this->showError( $internal );
 362                                 break;
 363
 364                         default:
 365                                 throw new MWException( __METHOD__ . ": Unknown value `{$value}`" );
 366                 }
 367         }
 368
 369         /**
 370          * Really do the upload
 371          * Checks are made in SpecialUpload::execute()
 372          *
 373          * @param array $resultDetails contains result-specific dict of additional values
 374          *
 375          * @access private
 376          */
 377         function internalProcessUpload( &$resultDetails ) {
 378                 global $wgUser;
 379
 380                 if( !wfRunHooks( 'UploadForm:BeforeProcessing', array( &$this ) ) )
 381                 {
 382                         wfDebug( "Hook 'UploadForm:BeforeProcessing' broke processing the file.\n" );
 383                         return self::BEFORE_PROCESSING;
 384                 }
 385
 386                 /**
 387                  * If there was no filename or a zero size given, give up quick.
 388                  */
 389                 if( trim( $this->mSrcName ) == '' || empty( $this->mFileSize ) ) {
 390                         return self::EMPTY_FILE;
 391                 }
 392
 393                 /* Check for curl error */
 394                 if( $this->mCurlError ) {
 395                         return self::BEFORE_PROCESSING;
 396                 }
 397
 398                 /**
 399                  * Chop off any directories in the given filename. Then
 400                  * filter out illegal characters, and try to make a legible name
 401                  * out of it. We'll strip some silently that Title would die on.
 402                  */
 403                 if( $this->mDesiredDestName ) {
 404                         $basename = $this->mDesiredDestName;
 405                 } else {
 406                         $basename = $this->mSrcName;
 407                 }
 408                 $filtered = wfStripIllegalFilenameChars( $basename );
 409
 410                 /* Normalize to title form before we do any further processing */
 411                 $nt = Title::makeTitleSafe( NS_FILE, $filtered );
 412                 if( is_null( $nt ) ) {
 413                         $resultDetails = array( 'filtered' => $filtered );
 414                         return self::ILLEGAL_FILENAME;
 415                 }
 416                 $filtered = $nt->getDBkey();
 417
 418                 /**
 419                  * We'll want to blacklist against *any* 'extension', and use
 420                  * only the final one for the whitelist.
 421                  */
 422                 list( $partname, $ext ) = $this->splitExtensions( $filtered );
 423
 424                 if( count( $ext ) ) {
 425                         $finalExt = $ext[count( $ext ) - 1];
 426                 } else {
 427                         $finalExt = '';
 428                 }
 429
 430                 # If there was more than one "extension", reassemble the base
 431                 # filename to prevent bogus complaints about length
 432                 if( count( $ext ) > 1 ) {
 433                         for( $i = 0; $i < count( $ext ) - 1; $i++ )
 434                                 $partname .= '.' . $ext[$i];
 435                 }
 436
 437                 if( strlen( $partname ) < 1 ) {
 438                         return self::MIN_LENGTH_PARTNAME;
 439                 }
 440
 441                 $this->mLocalFile = wfLocalFile( $nt );
 442                 $this->mDestName = $this->mLocalFile->getName();
 443
 444                 /**
 445                  * If the image is protected, non-sysop users won't be able
 446                  * to modify it by uploading a new revision.
 447                  */
 448                 $permErrors = $nt->getUserPermissionsErrors( 'edit', $wgUser );
 449                 $permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $wgUser );
 450                 $permErrorsCreate = ( $nt->exists() ? array() : $nt->getUserPermissionsErrors( 'create', $wgUser ) );
 451
 452                 if( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
 453                         // merge all the problems into one list, avoiding duplicates
 454                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
 455                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );
 456                         $resultDetails = array( 'permissionserrors' => $permErrors );
 457                         return self::PROTECTED_PAGE;
 458                 }
 459
 460                 /**
 461                  * In some cases we may forbid overwriting of existing files.
 462                  */
 463                 $overwrite = $this->checkOverwrite( $this->mDestName );
 464                 if( $overwrite !== true ) {
 465                         $resultDetails = array( 'overwrite' => $overwrite );
 466                         return self::OVERWRITE_EXISTING_FILE;
 467                 }
 468
 469                 /* Don't allow users to override the blacklist (check file extension) */
 470                 global $wgCheckFileExtensions, $wgStrictFileExtensions;
 471                 global $wgFileExtensions, $wgFileBlacklist;
 472                 if ($finalExt == '') {
 473                         return self::FILETYPE_MISSING;
 474                 } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) ||
 475                                 ($wgCheckFileExtensions && $wgStrictFileExtensions &&
 476                                         !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) ) {
 477                         $resultDetails = array( 'finalExt' => $finalExt );
 478                         return self::FILETYPE_BADTYPE;
 479                 }
 480
 481                 /**
 482                  * Look at the contents of the file; if we can recognize the
 483                  * type but it's corrupt or data of the wrong type, we should
 484                  * probably not accept it.
 485                  */
 486                 if( !$this->mStashed ) {
 487                         $this->mFileProps = File::getPropsFromPath( $this->mTempPath, $finalExt );
 488                         $this->checkMacBinary();
 489                         $veri = $this->verify( $this->mTempPath, $finalExt );
 490
 491                         if( $veri !== true ) { //it's a wiki error...
 492                                 $resultDetails = array( 'veri' => $veri );
 493                                 return self::VERIFICATION_ERROR;
 494                         }
 495
 496                         /**
 497                          * Provide an opportunity for extensions to add further checks
 498                          */
 499                         $error = '';
 500                         if( !wfRunHooks( 'UploadVerification',
 501                                         array( $this->mDestName, $this->mTempPath, &$error ) ) ) {
 502                                 $resultDetails = array( 'error' => $error );
 503                                 return self::UPLOAD_VERIFICATION_ERROR;
 504                         }
 505                 }
 506
 507
 508                 /**
 509                  * Check for non-fatal conditions
 510                  */
 511                 if ( ! $this->mIgnoreWarning ) {
 512                         $warning = '';
 513
 514                         $comparableName = str_replace( ' ', '_', $basename );
 515                         global $wgCapitalLinks, $wgContLang;
 516                         if ( $wgCapitalLinks ) {
 517                                 $comparableName = $wgContLang->ucfirst( $comparableName );
 518                         }
 519
 520                         if( $comparableName !== $filtered ) {
 521                                 $warning .=  '<li>'.wfMsgHtml( 'badfilename', htmlspecialchars( $this->mDestName ) ).'</li>';
 522                         }
 523
 524                         global $wgCheckFileExtensions;
 525                         if ( $wgCheckFileExtensions ) {
 526                                 if ( !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) {
 527                                         global $wgLang;
 528                                         $warning .= '<li>' .
 529                                         wfMsgExt( 'filetype-unwanted-type',
 530                                                 array( 'parseinline' ),
 531                                                 htmlspecialchars( $finalExt ),
 532                                                 $wgLang->commaList( $wgFileExtensions ),
 533                                                 $wgLang->formatNum( count($wgFileExtensions) )
 534                                         ) . '</li>';
 535                                 }
 536                         }
 537
 538                         global $wgUploadSizeWarning;
 539                         if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) {
 540                                 $skin = $wgUser->getSkin();
 541                                 $wsize = $skin->formatSize( $wgUploadSizeWarning );
 542                                 $asize = $skin->formatSize( $this->mFileSize );
 543                                 $warning .= '<li>' . wfMsgHtml( 'large-file', $wsize, $asize ) . '</li>';
 544                         }
 545                         if ( $this->mFileSize == 0 ) {
 546                                 $warning .= '<li>'.wfMsgHtml( 'emptyfile' ).'</li>';
 547                         }
 548
 549                         if ( !$this->mDestWarningAck ) {
 550                                 $warning .= self::getExistsWarning( $this->mLocalFile );
 551                         }
 552
 553                         $warning .= $this->getDupeWarning( $this->mTempPath, $finalExt, $nt );
 554
 555                         if( $warning != '' ) {
 556                                 /**
 557                                  * Stash the file in a temporary location; the user can choose
 558                                  * to let it through and we'll complete the upload then.
 559                                  */
 560                                 $resultDetails = array( 'warning' => $warning );
 561                                 return self::UPLOAD_WARNING;
 562                         }
 563                 }
 564
 565                 /**
 566                  * Try actually saving the thing...
 567                  * It will show an error form on failure.
 568                  */
 569                 $pageText = self::getInitialPageText( $this->mComment, $this->mLicense,
 570                         $this->mCopyrightStatus, $this->mCopyrightSource );
 571
 572                 $status = $this->mLocalFile->upload( $this->mTempPath, $this->mComment, $pageText,
 573                         File::DELETE_SOURCE, $this->mFileProps );
 574                 if ( !$status->isGood() ) {
 575                         $resultDetails = array( 'internal' => $status->getWikiText() );
 576                         return self::INTERNAL_ERROR;
 577                 } else {
 578                         if ( $this->mWatchthis ) {
 579                                 global $wgUser;
 580                                 $wgUser->addWatch( $this->mLocalFile->getTitle() );
 581                         }
 582                         // Success, redirect to description page
 583                         $img = null; // @todo: added to avoid passing a ref to null - should this be defined somewhere?
 584                         wfRunHooks( 'UploadComplete', array( &$this ) );
 585                         return self::SUCCESS;
 586                 }
 587         }
 588
 589         /**
 590          * Do existence checks on a file and produce a warning
 591          * This check is static and can be done pre-upload via AJAX
 592          * Returns an HTML fragment consisting of one or more LI elements if there is a warning
 593          * Returns an empty string if there is no warning
 594          */
 595         static function getExistsWarning( $file ) {
 596                 global $wgUser, $wgContLang;
 597                 // Check for uppercase extension. We allow these filenames but check if an image
 598                 // with lowercase extension exists already
 599                 $warning = '';
 600                 $align = $wgContLang->isRtl() ? 'left' : 'right';
 601
 602                 if( strpos( $file->getName(), '.' ) == false ) {
 603                         $partname = $file->getName();
 604                         $rawExtension = '';
 605                 } else {
 606                         $n = strrpos( $file->getName(), '.' );
 607                         $rawExtension = substr( $file->getName(), $n + 1 );
 608                         $partname = substr( $file->getName(), 0, $n );
 609                 }
 610
 611                 $sk = $wgUser->getSkin();
 612
 613                 if ( $rawExtension != $file->getExtension() ) {
 614                         // We're not using the normalized form of the extension.
 615                         // Normal form is lowercase, using most common of alternate
 616                         // extensions (eg 'jpg' rather than 'JPEG').
 617                         //
 618                         // Check for another file using the normalized form...
 619                         $nt_lc = Title::makeTitle( NS_FILE, $partname . '.' . $file->getExtension() );
 620                         $file_lc = wfLocalFile( $nt_lc );
 621                 } else {
 622                         $file_lc = false;
 623                 }
 624
 625                 if( $file->exists() ) {
 626                         $dlink = $sk->makeKnownLinkObj( $file->getTitle() );
 627                         if ( $file->allowInlineDisplay() ) {
 628                                 $dlink2 = $sk->makeImageLinkObj( $file->getTitle(), wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 629                                         $file->getName(), $align, array(), false, true );
 630                         } elseif ( !$file->allowInlineDisplay() && $file->isSafeFile() ) {
 631                                 $icon = $file->iconThumb();
 632                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 633                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 634                         } else {
 635                                 $dlink2 = '';
 636                         }
 637
 638                         $warning .= '<li>' . wfMsgExt( 'fileexists', array('parseinline','replaceafter'), $dlink ) . '</li>' . $dlink2;
 639
 640                 } elseif( $file->getTitle()->getArticleID() ) {
 641                         $lnk = $sk->makeKnownLinkObj( $file->getTitle(), '', 'redirect=no' );
 642                         $warning .= '<li>' . wfMsgExt( 'filepageexists', array( 'parseinline', 'replaceafter' ), $lnk ) . '</li>';
 643                 } elseif ( $file_lc && $file_lc->exists() ) {
 644                         # Check if image with lowercase extension exists.
 645                         # It's not forbidden but in 99% it makes no sense to upload the same filename with uppercase extension
 646                         $dlink = $sk->makeKnownLinkObj( $nt_lc );
 647                         if ( $file_lc->allowInlineDisplay() ) {
 648                                 $dlink2 = $sk->makeImageLinkObj( $nt_lc, wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 649                                         $nt_lc->getText(), $align, array(), false, true );
 650                         } elseif ( !$file_lc->allowInlineDisplay() && $file_lc->isSafeFile() ) {
 651                                 $icon = $file_lc->iconThumb();
 652                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 653                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 654                         } else {
 655                                 $dlink2 = '';
 656                         }
 657
 658                         $warning .= '<li>' .
 659                                 wfMsgExt( 'fileexists-extension', 'parsemag',
 660                                         $file->getTitle()->getPrefixedText(), $dlink ) .
 661                                 '</li>' . $dlink2;
 662
 663                 } elseif ( ( substr( $partname , 3, 3 ) == 'px-' || substr( $partname , 2, 3 ) == 'px-' )
 664                         && ereg( "[0-9]{2}" , substr( $partname , 0, 2) ) )
 665                 {
 666                         # Check for filenames like 50px- or 180px-, these are mostly thumbnails
 667                         $nt_thb = Title::newFromText( substr( $partname , strpos( $partname , '-' ) +1 ) . '.' . $rawExtension );
 668                         $file_thb = wfLocalFile( $nt_thb );
 669                         if ($file_thb->exists() ) {
 670                                 # Check if an image without leading '180px-' (or similiar) exists
 671                                 $dlink = $sk->makeKnownLinkObj( $nt_thb);
 672                                 if ( $file_thb->allowInlineDisplay() ) {
 673                                         $dlink2 = $sk->makeImageLinkObj( $nt_thb,
 674                                                 wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 675                                                 $nt_thb->getText(), $align, array(), false, true );
 676                                 } elseif ( !$file_thb->allowInlineDisplay() && $file_thb->isSafeFile() ) {
 677                                         $icon = $file_thb->iconThumb();
 678                                         $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 679                                                 $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' .
 680                                                 $dlink . '</div>';
 681                                 } else {
 682                                         $dlink2 = '';
 683                                 }
 684
 685                                 $warning .= '<li>' . wfMsgExt( 'fileexists-thumbnail-yes', 'parsemag', $dlink ) .
 686                                         '</li>' . $dlink2;
 687                         } else {
 688                                 # Image w/o '180px-' does not exists, but we do not like these filenames
 689                                 $warning .= '<li>' . wfMsgExt( 'file-thumbnail-no', 'parseinline' ,
 690                                         substr( $partname , 0, strpos( $partname , '-' ) +1 ) ) . '</li>';
 691                         }
 692                 }
 693
 694                 $filenamePrefixBlacklist = self::getFilenamePrefixBlacklist();
 695                 # Do the match
 696                 foreach( $filenamePrefixBlacklist as $prefix ) {
 697                         if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
 698                                 $warning .= '<li>' . wfMsgExt( 'filename-bad-prefix', 'parseinline', $prefix ) . '</li>';
 699                                 break;
 700                         }
 701                 }
 702
 703                 if ( $file->wasDeleted() && !$file->exists() ) {
 704                         # If the file existed before and was deleted, warn the user of this
 705                         # Don't bother doing so if the file exists now, however
 706                         $ltitle = SpecialPage::getTitleFor( 'Log' );
 707                         $llink = $sk->makeKnownLinkObj( $ltitle, wfMsgHtml( 'deletionlog' ),
 708                                 'type=delete&page=' . $file->getTitle()->getPrefixedUrl() );
 709                         $warning .= '<li>' . wfMsgWikiHtml( 'filewasdeleted', $llink ) . '</li>';
 710                 }
 711                 return $warning;
 712         }
 713
 714         /**
 715          * Get a list of warnings
 716          *
 717          * @param string local filename, e.g. 'file exists', 'non-descriptive filename'
 718          * @return array list of warning messages
 719          */
 720         static function ajaxGetExistsWarning( $filename ) {
 721                 $file = wfFindFile( $filename );
 722                 if( !$file ) {
 723                         // Force local file so we have an object to do further checks against
 724                         // if there isn't an exact match...
 725                         $file = wfLocalFile( $filename );
 726                 }
 727                 $s = '&nbsp;';
 728                 if ( $file ) {
 729                         $warning = self::getExistsWarning( $file );
 730                         if ( $warning !== '' ) {
 731                                 $s = "<ul>$warning</ul>";
 732                         }
 733                 }
 734                 return $s;
 735         }
 736
 737         /**
 738          * Render a preview of a given license for the AJAX preview on upload
 739          *
 740          * @param string $license
 741          * @return string
 742          */
 743         public static function ajaxGetLicensePreview( $license ) {
 744                 global $wgParser, $wgUser;
 745                 $text = '{{' . $license . '}}';
 746                 $title = Title::makeTitle( NS_FILE, 'Sample.jpg' );
 747                 $options = ParserOptions::newFromUser( $wgUser );
 748
 749                 // Expand subst: first, then live templates...
 750                 $text = $wgParser->preSaveTransform( $text, $title, $wgUser, $options );
 751                 $output = $wgParser->parse( $text, $title, $options );
 752
 753                 return $output->getText();
 754         }
 755
 756         /**
 757          * Check for duplicate files and throw up a warning before the upload
 758          * completes.
 759          */
 760         function getDupeWarning( $tempfile, $extension, $destinationTitle ) {
 761                 $hash = File::sha1Base36( $tempfile );
 762                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 763                 $archivedImage = new ArchivedFile( null, 0, $hash.".$extension" );
 764                 if( $dupes ) {
 765                         global $wgOut;
 766                         $msg = "<gallery>";
 767                         foreach( $dupes as $file ) {
 768                                 $title = $file->getTitle();
 769                                 # Don't throw the warning when the titles are the same, it's a reupload
 770                                 # and highly redundant.
 771                                 if ( !$title->equals( $destinationTitle ) || !$this->mIsReUpload ) {
 772                                         $msg .= $title->getPrefixedText() .
 773                                                 "|" . $title->getText() . "\n";
 774                                 }
 775                         }
 776                         $msg .= "</gallery>";
 777                         return "<li>" .
 778                                 wfMsgExt( "file-exists-duplicate", array( "parse" ), count( $dupes ) ) .
 779                                 $wgOut->parse( $msg ) .
 780                                 "</li>\n";
 781                 } elseif ( $archivedImage->getID() > 0 ) {
 782                         global $wgOut;
 783                         $name = Title::makeTitle( NS_FILE, $archivedImage->getName() )->getPrefixedText();
 784                         return Xml::tags( 'li', null, wfMsgExt( 'file-deleted-duplicate', array( 'parseinline' ), array( $name ) ) );
 785                 } else {
 786                         return '';
 787                 }
 788         }
 789
 790         /**
 791          * Get a list of blacklisted filename prefixes from [[MediaWiki:filename-prefix-blacklist]]
 792          *
 793          * @return array list of prefixes
 794          */
 795         public static function getFilenamePrefixBlacklist() {
 796                 $blacklist = array();
 797                 $message = wfMsgForContent( 'filename-prefix-blacklist' );
 798                 if( $message && !( wfEmptyMsg( 'filename-prefix-blacklist', $message ) || $message == '-' ) ) {
 799                         $lines = explode( "\n", $message );
 800                         foreach( $lines as $line ) {
 801                                 // Remove comment lines
 802                                 $comment = substr( trim( $line ), 0, 1 );
 803                                 if ( $comment == '#' || $comment == '' ) {
 804                                         continue;
 805                                 }
 806                                 // Remove additional comments after a prefix
 807                                 $comment = strpos( $line, '#' );
 808                                 if ( $comment > 0 ) {
 809                                         $line = substr( $line, 0, $comment-1 );
 810                                 }
 811                                 $blacklist[] = trim( $line );
 812                         }
 813                 }
 814                 return $blacklist;
 815         }
 816
 817         /**
 818          * Stash a file in a temporary directory for later processing
 819          * after the user has confirmed it.
 820          *
 821          * If the user doesn't explicitly cancel or accept, these files
 822          * can accumulate in the temp directory.
 823          *
 824          * @param string $saveName - the destination filename
 825          * @param string $tempName - the source temporary file to save
 826          * @return string - full path the stashed file, or false on failure
 827          * @access private
 828          */
 829         function saveTempUploadedFile( $saveName, $tempName ) {
 830                 global $wgOut;
 831                 $repo = RepoGroup::singleton()->getLocalRepo();
 832                 $status = $repo->storeTemp( $saveName, $tempName );
 833                 if ( !$status->isGood() ) {
 834                         $this->showError( $status->getWikiText() );
 835                         return false;
 836                 } else {
 837                         return $status->value;
 838                 }
 839         }
 840
 841         /**
 842          * Stash a file in a temporary directory for later processing,
 843          * and save the necessary descriptive info into the session.
 844          * Returns a key value which will be passed through a form
 845          * to pick up the path info on a later invocation.
 846          *
 847          * @return int
 848          * @access private
 849          */
 850         function stashSession() {
 851                 $stash = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath );
 852
 853                 if( !$stash ) {
 854                         # Couldn't save the file.
 855                         return false;
 856                 }
 857
 858                 $key = mt_rand( 0, 0x7fffffff );
 859                 $_SESSION['wsUploadData'][$key] = array(
 860                         'mTempPath'       => $stash,
 861                         'mFileSize'       => $this->mFileSize,
 862                         'mSrcName'        => $this->mSrcName,
 863                         'mFileProps'      => $this->mFileProps,
 864                         'version'         => self::SESSION_VERSION,
 865                 );
 866                 return $key;
 867         }
 868
 869         /**
 870          * Remove a temporarily kept file stashed by saveTempUploadedFile().
 871          * @access private
 872          * @return success
 873          */
 874         function unsaveUploadedFile() {
 875                 global $wgOut;
 876                 if( !$this->mTempPath ) return true; // nothing to delete
 877                 $repo = RepoGroup::singleton()->getLocalRepo();
 878                 $success = $repo->freeTemp( $this->mTempPath );
 879                 if ( ! $success ) {
 880                         $wgOut->showFileDeleteError( $this->mTempPath );
 881                         return false;
 882                 } else {
 883                         return true;
 884                 }
 885         }
 886
 887         /* -------------------------------------------------------------- */
 888
 889         /**
 890          * @param string $error as HTML
 891          * @access private
 892          */
 893         function uploadError( $error ) {
 894                 global $wgOut;
 895                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 896                 $wgOut->addHTML( '<span class="error">' . $error . '</span>' );
 897         }
 898
 899         /**
 900          * There's something wrong with this file, not enough to reject it
 901          * totally but we require manual intervention to save it for real.
 902          * Stash it away, then present a form asking to confirm or cancel.
 903          *
 904          * @param string $warning as HTML
 905          * @access private
 906          */
 907         function uploadWarning( $warning ) {
 908                 global $wgOut;
 909                 global $wgUseCopyrightUpload;
 910
 911                 $this->mSessionKey = $this->stashSession();
 912                 if( !$this->mSessionKey ) {
 913                         # Couldn't save file; an error has been displayed so let's go.
 914                         return;
 915                 }
 916
 917                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 918                 $wgOut->addHTML( '<ul class="warning">' . $warning . "</ul>\n" );
 919
 920                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
 921
 922                 if ( $wgUseCopyrightUpload ) {
 923                         $copyright = Xml::hidden( 'wpUploadCopyStatus', $this->mCopyrightStatus ) . "\n" .
 924                                         Xml::hidden( 'wpUploadSource', $this->mCopyrightSource ) . "\n";
 925                 } else {
 926                         $copyright = '';
 927                 }
 928
 929                 $wgOut->addHTML(
 930                         Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL( 'action=submit' ),
 931                                  'enctype' => 'multipart/form-data', 'id' => 'uploadwarning' ) ) . "\n" .
 932                         Xml::hidden( 'wpIgnoreWarning', '1' ) . "\n" .
 933                         Xml::hidden( 'wpSessionKey', $this->mSessionKey ) . "\n" .
 934                         Xml::hidden( 'wpUploadDescription', $this->mComment ) . "\n" .
 935                         Xml::hidden( 'wpLicense', $this->mLicense ) . "\n" .
 936                         Xml::hidden( 'wpDestFile', $this->mDesiredDestName ) . "\n" .
 937                         Xml::hidden( 'wpWatchthis', $this->mWatchthis ) . "\n" .
 938                         "{$copyright}<br />" .
 939                         Xml::submitButton( wfMsg( 'ignorewarning' ), array ( 'name' => 'wpUpload', 'id' => 'wpUpload', 'checked' => 'checked' ) ) . ' ' .
 940                         Xml::submitButton( wfMsg( 'reuploaddesc' ), array ( 'name' => 'wpReUpload', 'id' => 'wpReUpload' ) ) .
 941                         Xml::closeElement( 'form' ) . "\n"
 942                 );
 943         }
 944
 945         /**
 946          * Displays the main upload form, optionally with a highlighted
 947          * error message up at the top.
 948          *
 949          * @param string $msg as HTML
 950          * @access private
 951          */
 952         function mainUploadForm( $msg='' ) {
 953                 global $wgOut, $wgUser, $wgLang, $wgMaxUploadSize;
 954                 global $wgUseCopyrightUpload, $wgUseAjax, $wgAjaxUploadDestCheck, $wgAjaxLicensePreview;
 955                 global $wgRequest, $wgAllowCopyUploads;
 956                 global $wgStylePath, $wgStyleVersion;
 957
 958                 $useAjaxDestCheck = $wgUseAjax && $wgAjaxUploadDestCheck;
 959                 $useAjaxLicensePreview = $wgUseAjax && $wgAjaxLicensePreview;
 960
 961                 $adc = wfBoolToStr( $useAjaxDestCheck );
 962                 $alp = wfBoolToStr( $useAjaxLicensePreview );
 963                 $autofill = wfBoolToStr( $this->mDesiredDestName == '' );
 964
 965                 $wgOut->addScript( "<script type=\"text/javascript\">
 966 wgAjaxUploadDestCheck = {$adc};
 967 wgAjaxLicensePreview = {$alp};
 968 wgUploadAutoFill = {$autofill};
 969 </script>" );
 970                 $wgOut->addScriptFile( 'upload.js' );
 971                 $wgOut->addScriptFile( 'edit.js' ); // For <charinsert> support
 972
 973                 if( !wfRunHooks( 'UploadForm:initial', array( &$this ) ) )
 974                 {
 975                         wfDebug( "Hook 'UploadForm:initial' broke output of the upload form\n" );
 976                         return false;
 977                 }
 978
 979                 if( $this->mDesiredDestName ) {
 980                         $title = Title::makeTitleSafe( NS_FILE, $this->mDesiredDestName );
 981                         // Show a subtitle link to deleted revisions (to sysops et al only)
 982                         if( $title instanceof Title && ( $count = $title->isDeleted() ) > 0 && $wgUser->isAllowed( 'deletedhistory' ) ) {
 983                                 $link = wfMsgExt(
 984                                         $wgUser->isAllowed( 'delete' ) ? 'thisisdeleted' : 'viewdeleted',
 985                                         array( 'parse', 'replaceafter' ),
 986                                         $wgUser->getSkin()->makeKnownLinkObj(
 987                                                 SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedText() ),
 988                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $count )
 989                                         )
 990                                 );
 991                                 $wgOut->addHTML( "<div id=\"contentSub2\">{$link}</div>" );
 992                         }
 993
 994                         // Show the relevant lines from deletion log (for still deleted files only)
 995                         if( $title instanceof Title && $title->isDeleted() > 0 && !$title->exists() ) {
 996                                 $this->showDeletionLog( $wgOut, $title->getPrefixedText() );
 997                         }
 998                 }
 999
1000                 $cols = intval($wgUser->getOption( 'cols' ));
1001
1002                 if( $wgUser->getOption( 'editwidth' ) ) {
1003                         $width = " style=\"width:100%\"";
1004                 } else {
1005                         $width = '';
1006                 }
1007
1008                 if ( '' != $msg ) {
1009                         $sub = wfMsgHtml( 'uploaderror' );
1010                         $wgOut->addHTML( "<h2>{$sub}</h2>\n" .
1011                           "<span class='error'>{$msg}</span>\n" );
1012                 }
1013                 $wgOut->addHTML( '<div id="uploadtext">' );
1014                 $wgOut->addWikiMsg( 'uploadtext', $this->mDesiredDestName );
1015                 $wgOut->addHTML( "</div>\n" );
1016
1017                 # Print a list of allowed file extensions, if so configured.  We ignore
1018                 # MIME type here, it's incomprehensible to most people and too long.
1019                 global $wgCheckFileExtensions, $wgStrictFileExtensions,
1020                 $wgFileExtensions, $wgFileBlacklist;
1021
1022                 $allowedExtensions = '';
1023                 if( $wgCheckFileExtensions ) {
1024                         if( $wgStrictFileExtensions ) {
1025                                 # Everything not permitted is banned
1026                                 $extensionsList =
1027                                         '<div id="mw-upload-permitted">' .
1028                                         wfMsgWikiHtml( 'upload-permitted', $wgLang->commaList( $wgFileExtensions ) ) .
1029                                         "</div>\n";
1030                         } else {
1031                                 # We have to list both preferred and prohibited
1032                                 $extensionsList =
1033                                         '<div id="mw-upload-preferred">' .
1034                                         wfMsgWikiHtml( 'upload-preferred', $wgLang->commaList( $wgFileExtensions ) ) .
1035                                         "</div>\n" .
1036                                         '<div id="mw-upload-prohibited">' .
1037                                         wfMsgWikiHtml( 'upload-prohibited', $wgLang->commaList( $wgFileBlacklist ) ) .
1038                                         "</div>\n";
1039                         }
1040                 } else {
1041                         # Everything is permitted.
1042                         $extensionsList = '';
1043                 }
1044
1045                 # Get the maximum file size from php.ini as $wgMaxUploadSize works for uploads from URL via CURL only
1046                 # See http://www.php.net/manual/en/ini.core.php#ini.upload-max-filesize for possible values of upload_max_filesize
1047                 $val = trim( ini_get( 'upload_max_filesize' ) );
1048                 $last = strtoupper( ( substr( $val, -1 ) ) );
1049                 switch( $last ) {
1050                         case 'G':
1051                                 $val2 = substr( $val, 0, -1 ) * 1024 * 1024 * 1024;
1052                                 break;
1053                         case 'M':
1054                                 $val2 = substr( $val, 0, -1 ) * 1024 * 1024;
1055                                 break;
1056                         case 'K':
1057                                 $val2 = substr( $val, 0, -1 ) * 1024;
1058                                 break;
1059                         default:
1060                                 $val2 = $val;
1061                 }
1062                 $val2 = $wgAllowCopyUploads ? min( $wgMaxUploadSize, $val2 ) : $val2;
1063                 $maxUploadSize = '<div id="mw-upload-maxfilesize">' .
1064                         wfMsgExt( 'upload-maxfilesize', array( 'parseinline', 'escapenoentities' ),
1065                                 $wgLang->formatSize( $val2 ) ) .
1066                                 "</div>\n";
1067
1068                 $sourcefilename = wfMsgExt( 'sourcefilename', array( 'parseinline', 'escapenoentities' ) );
1069         $destfilename = wfMsgExt( 'destfilename', array( 'parseinline', 'escapenoentities' ) );
1070
1071                 $msg = $this->mReUpload ? 'filereuploadsummary' : 'fileuploadsummary';
1072                 $summary = wfMsgExt( $msg, 'parseinline' );
1073
1074                 $licenses = new Licenses();
1075                 $license = wfMsgExt( 'license', array( 'parseinline' ) );
1076                 $nolicense = wfMsgHtml( 'nolicense' );
1077                 $licenseshtml = $licenses->getHtml();
1078
1079                 $ulb = wfMsgHtml( 'uploadbtn' );
1080
1081
1082                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
1083
1084                 $encDestName = htmlspecialchars( $this->mDesiredDestName );
1085
1086                 $watchChecked = $this->watchCheck() ? 'checked="checked"' : '';
1087                 # Re-uploads should not need "file exist already" warnings
1088                 $warningChecked = ($this->mIgnoreWarning || $this->mReUpload) ? 'checked="checked"' : '';
1089
1090                 // Prepare form for upload or upload/copy
1091                 if( $wgAllowCopyUploads && $wgUser->isAllowed( 'upload_by_url' ) ) {
1092                         $filename_form =
1093                                 "<input type='radio' id='wpSourceTypeFile' name='wpSourceType' value='file' " .
1094                                    "onchange='toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\")' checked='checked' />" .
1095                                  "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1096                                    "onfocus='" .
1097                                      "toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\");" .
1098                                      "toggle_element_check(\"wpSourceTypeFile\",\"wpSourceTypeURL\")' " .
1099                                      "onchange='fillDestFilename(\"wpUploadFile\")' size='60' />" .
1100                                 wfMsgHTML( 'upload_source_file' ) . "<br/>" .
1101                                 "<input type='radio' id='wpSourceTypeURL' name='wpSourceType' value='web' " .
1102                                   "onchange='toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\")' />" .
1103                                 "<input tabindex='1' type='text' name='wpUploadFileURL' id='wpUploadFileURL' " .
1104                                   "onfocus='" .
1105                                     "toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\");" .
1106                                     "toggle_element_check(\"wpSourceTypeURL\",\"wpSourceTypeFile\")' " .
1107                                     "onchange='fillDestFilename(\"wpUploadFileURL\")' size='60' disabled='disabled' />" .
1108                                 wfMsgHtml( 'upload_source_url' ) ;
1109                 } else {
1110                         $filename_form =
1111                                 "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1112                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") .
1113                                 "size='60' />" .
1114                                 "<input type='hidden' name='wpSourceType' value='file' />" ;
1115                 }
1116                 if ( $useAjaxDestCheck ) {
1117                         $warningRow = "<tr><td colspan='2' id='wpDestFile-warning'>&nbsp;</td></tr>";
1118                         $destOnkeyup = 'onkeyup="wgUploadWarningObj.keypress();"';
1119                 } else {
1120                         $warningRow = '';
1121                         $destOnkeyup = '';
1122                 }
1123                 # Uploading a new version? If so, the name is fixed.
1124                 $on = $this->mReUpload ? "disabled='disabled'" : "";
1125
1126                 $encComment = htmlspecialchars( $this->mComment );
1127
1128                 $wgOut->addHTML(
1129                          Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL(),
1130                                  'enctype' => 'multipart/form-data', 'id' => 'mw-upload-form' ) ) .
1131                          Xml::openElement( 'fieldset' ) .
1132                          Xml::element( 'legend', null, wfMsg( 'upload' ) ) .
1133                          Xml::openElement( 'table', array( 'border' => '0', 'id' => 'mw-upload-table' ) ) .
1134                          "<tr>
1135                                 {$this->uploadFormTextTop}
1136                                 <td class='mw-label'>
1137                                         <label for='wpUploadFile'>{$sourcefilename}</label>
1138                                 </td>
1139                                 <td class='mw-input'>
1140                                         {$filename_form}
1141                                 </td>
1142                         </tr>
1143                         <tr>
1144                                 <td></td>
1145                                 <td>
1146                                         {$maxUploadSize}
1147                                         {$extensionsList}
1148                                 </td>
1149                         </tr>
1150                         <tr>
1151                                 <td class='mw-label'>
1152                                         <label for='wpDestFile'>{$destfilename}</label>
1153                                 </td>
1154                                 <td class='mw-input'>
1155                                         <input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='60'
1156                                                 value=\"{$encDestName}\" onchange='toggleFilenameFiller()' $on $destOnkeyup />
1157                                 </td>
1158                         </tr>
1159                         <tr>
1160                                 <td class='mw-label'>
1161                                         <label for='wpUploadDescription'>{$summary}</label>
1162                                 </td>
1163                                 <td class='mw-input'>
1164                                         <textarea tabindex='3' name='wpUploadDescription' id='wpUploadDescription' rows='6'
1165                                                 cols='{$cols}'{$width}>$encComment</textarea>
1166                                         {$this->uploadFormTextAfterSummary}
1167                                 </td>
1168                         </tr>
1169                         <tr>"
1170                 );
1171                 # Re-uploads should not need license info
1172                 if ( !$this->mReUpload && $licenseshtml != '' ) {
1173                         global $wgStylePath;
1174                         $wgOut->addHTML( "
1175                                         <td class='mw-label'>
1176                                                 <label for='wpLicense'>$license</label>
1177                                         </td>
1178                                         <td class='mw-input'>
1179                                                 <select name='wpLicense' id='wpLicense' tabindex='4'
1180                                                         onchange='licenseSelectorCheck()'>
1181                                                         <option value=''>$nolicense</option>
1182                                                         $licenseshtml
1183                                                 </select>
1184                                         </td>
1185                                 </tr>
1186                                 <tr>"
1187                         );
1188                         if( $useAjaxLicensePreview ) {
1189                                 $wgOut->addHTML( "
1190                                                 <td></td>
1191                                                 <td id=\"mw-license-preview\"></td>
1192                                         </tr>
1193                                         <tr>"
1194                                 );
1195                         }
1196                 }
1197
1198                 if ( !$this->mReUpload && $wgUseCopyrightUpload ) {
1199                         $filestatus = wfMsgExt( 'filestatus', 'escapenoentities' );
1200                         $copystatus =  htmlspecialchars( $this->mCopyrightStatus );
1201                         $filesource = wfMsgExt( 'filesource', 'escapenoentities' );
1202                         $uploadsource = htmlspecialchars( $this->mCopyrightSource );
1203
1204                         $wgOut->addHTML( "
1205                                         <td class='mw-label' style='white-space: nowrap;'>
1206                                                 <label for='wpUploadCopyStatus'>$filestatus</label></td>
1207                                         <td class='mw-input'>
1208                                                 <input tabindex='5' type='text' name='wpUploadCopyStatus' id='wpUploadCopyStatus'
1209                                                         value=\"$copystatus\" size='60' />
1210                                         </td>
1211                                 </tr>
1212                                 <tr>
1213                                         <td class='mw-label'>
1214                                                 <label for='wpUploadCopyStatus'>$filesource</label>
1215                                         </td>
1216                                         <td class='mw-input'>
1217                                                 <input tabindex='6' type='text' name='wpUploadSource' id='wpUploadCopyStatus'
1218                                                         value=\"$uploadsource\" size='60' />
1219                                         </td>
1220                                 </tr>
1221                                 <tr>"
1222                         );
1223                 }
1224
1225                 $wgOut->addHTML( "
1226                                 <td></td>
1227                                 <td>
1228                                         <input tabindex='7' type='checkbox' name='wpWatchthis' id='wpWatchthis' $watchChecked value='true' />
1229                                         <label for='wpWatchthis'>" . wfMsgHtml( 'watchthisupload' ) . "</label>
1230                                         <input tabindex='8' type='checkbox' name='wpIgnoreWarning' id='wpIgnoreWarning' value='true' $warningChecked />
1231                                         <label for='wpIgnoreWarning'>" . wfMsgHtml( 'ignorewarnings' ) . "</label>
1232                                 </td>
1233                         </tr>
1234                         $warningRow
1235                         <tr>
1236                                 <td></td>
1237                                         <td class='mw-input'>
1238                                                 <input tabindex='9' type='submit' name='wpUpload' value=\"{$ulb}\"" . $wgUser->getSkin()->tooltipAndAccesskey( 'upload' ) . " />
1239                                         </td>
1240                         </tr>
1241                         <tr>
1242                                 <td></td>
1243                                 <td class='mw-input'>"
1244                 );
1245                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1246                 $wgOut->addHTML( "
1247                                 </td>
1248                         </tr>" .
1249                         Xml::closeElement( 'table' ) .
1250                         Xml::hidden( 'wpDestFileWarningAck', '', array( 'id' => 'wpDestFileWarningAck' ) ) .
1251                         Xml::closeElement( 'fieldset' ) .
1252                         Xml::closeElement( 'form' )
1253                 );
1254                 $uploadfooter = wfMsgNoTrans( 'uploadfooter' );
1255                 if( $uploadfooter != '-' && !wfEmptyMsg( 'uploadfooter', $uploadfooter ) ){
1256                         $wgOut->addWikiText( '<div id="mw-upload-footer-message">' . $uploadfooter . '</div>' );
1257                 }
1258         }
1259
1260         /* -------------------------------------------------------------- */
1261
1262         /**
1263          * See if we should check the 'watch this page' checkbox on the form
1264          * based on the user's preferences and whether we're being asked
1265          * to create a new file or update an existing one.
1266          *
1267          * In the case where 'watch edits' is off but 'watch creations' is on,
1268          * we'll leave the box unchecked.
1269          *
1270          * Note that the page target can be changed *on the form*, so our check
1271          * state can get out of sync.
1272          */
1273         function watchCheck() {
1274                 global $wgUser;
1275                 if( $wgUser->getOption( 'watchdefault' ) ) {
1276                         // Watch all edits!
1277                         return true;
1278                 }
1279
1280                 $local = wfLocalFile( $this->mDesiredDestName );
1281                 if( $local && $local->exists() ) {
1282                         // We're uploading a new version of an existing file.
1283                         // No creation, so don't watch it if we're not already.
1284                         return $local->getTitle()->userIsWatching();
1285                 } else {
1286                         // New page should get watched if that's our option.
1287                         return $wgUser->getOption( 'watchcreations' );
1288                 }
1289         }
1290
1291         /**
1292          * Split a file into a base name and all dot-delimited 'extensions'
1293          * on the end. Some web server configurations will fall back to
1294          * earlier pseudo-'extensions' to determine type and execute
1295          * scripts, so the blacklist needs to check them all.
1296          *
1297          * @return array
1298          */
1299         public function splitExtensions( $filename ) {
1300                 $bits = explode( '.', $filename );
1301                 $basename = array_shift( $bits );
1302                 return array( $basename, $bits );
1303         }
1304
1305         /**
1306          * Perform case-insensitive match against a list of file extensions.
1307          * Returns true if the extension is in the list.
1308          *
1309          * @param string $ext
1310          * @param array $list
1311          * @return bool
1312          */
1313         function checkFileExtension( $ext, $list ) {
1314                 return in_array( strtolower( $ext ), $list );
1315         }
1316
1317         /**
1318          * Perform case-insensitive match against a list of file extensions.
1319          * Returns true if any of the extensions are in the list.
1320          *
1321          * @param array $ext
1322          * @param array $list
1323          * @return bool
1324          */
1325         public function checkFileExtensionList( $ext, $list ) {
1326                 foreach( $ext as $e ) {
1327                         if( in_array( strtolower( $e ), $list ) ) {
1328                                 return true;
1329                         }
1330                 }
1331                 return false;
1332         }
1333
1334         /**
1335          * Verifies that it's ok to include the uploaded file
1336          *
1337          * @param string $tmpfile the full path of the temporary file to verify
1338          * @param string $extension The filename extension that the file is to be served with
1339          * @return mixed true of the file is verified, a WikiError object otherwise.
1340          */
1341         function verify( $tmpfile, $extension ) {
1342                 #magically determine mime type
1343                 $magic = MimeMagic::singleton();
1344                 $mime = $magic->guessMimeType($tmpfile,false);
1345
1346
1347                 #check mime type, if desired
1348                 global $wgVerifyMimeType;
1349                 if ($wgVerifyMimeType) {
1350                         wfDebug ( "\n\nmime: <$mime> extension: <$extension>\n\n");
1351                         #check mime type against file extension
1352                         if( !self::verifyExtension( $mime, $extension ) ) {
1353                                 return new WikiErrorMsg( 'uploadcorrupt' );
1354                         }
1355
1356                         #check mime type blacklist
1357                         global $wgMimeTypeBlacklist;
1358                         if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist) ) {
1359                                 if ( $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
1360                                         return new WikiErrorMsg( 'filetype-badmime', htmlspecialchars( $mime ) );
1361                                 }
1362
1363                                 # Check IE type
1364                                 $fp = fopen( $tmpfile, 'rb' );
1365                                 $chunk = fread( $fp, 256 );
1366                                 fclose( $fp );
1367                                 $extMime = $magic->guessTypesForExtension( $extension );
1368                                 $ieTypes = $magic->getIEMimeTypes( $tmpfile, $chunk, $extMime );
1369                                 foreach ( $ieTypes as $ieType ) {
1370                                         if ( $this->checkFileExtension( $ieType, $wgMimeTypeBlacklist ) ) {
1371                                                 return new WikiErrorMsg( 'filetype-bad-ie-mime', $ieType );
1372                                         }
1373                                 }
1374                         }
1375                 }
1376
1377                 #check for htmlish code and javascript
1378                 if( $this->detectScript ( $tmpfile, $mime, $extension ) ) {
1379                         return new WikiErrorMsg( 'uploadscripted' );
1380                 }
1381                 if( $extension == 'svg' || $mime == 'image/svg+xml' ) {
1382                         if( $this->detectScriptInSvg( $tmpfile ) ) {
1383                                 return new WikiErrorMsg( 'uploadscripted' );
1384                         }
1385                 }
1386
1387                 /**
1388                 * Scan the uploaded file for viruses
1389                 */
1390                 $virus= $this->detectVirus($tmpfile);
1391                 if ( $virus ) {
1392                         return new WikiErrorMsg( 'uploadvirus', htmlspecialchars($virus) );
1393                 }
1394
1395                 wfDebug( __METHOD__.": all clear; passing.\n" );
1396                 return true;
1397         }
1398
1399         /**
1400          * Checks if the mime type of the uploaded file matches the file extension.
1401          *
1402          * @param string $mime the mime type of the uploaded file
1403          * @param string $extension The filename extension that the file is to be served with
1404          * @return bool
1405          */
1406         static function verifyExtension( $mime, $extension ) {
1407                 $magic = MimeMagic::singleton();
1408
1409                 if ( ! $mime || $mime == 'unknown' || $mime == 'unknown/unknown' )
1410                         if ( ! $magic->isRecognizableExtension( $extension ) ) {
1411                                 wfDebug( __METHOD__.": passing file with unknown detected mime type; " .
1412                                         "unrecognized extension '$extension', can't verify\n" );
1413                                 return true;
1414                         } else {
1415                                 wfDebug( __METHOD__.": rejecting file with unknown detected mime type; ".
1416                                         "recognized extension '$extension', so probably invalid file\n" );
1417                                 return false;
1418                         }
1419
1420                 $match= $magic->isMatchingExtension($extension,$mime);
1421
1422                 if ($match===NULL) {
1423                         wfDebug( __METHOD__.": no file extension known for mime type $mime, passing file\n" );
1424                         return true;
1425                 } elseif ($match===true) {
1426                         wfDebug( __METHOD__.": mime type $mime matches extension $extension, passing file\n" );
1427
1428                         #TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
1429                         return true;
1430
1431                 } else {
1432                         wfDebug( __METHOD__.": mime type $mime mismatches file extension $extension, rejecting file\n" );
1433                         return false;
1434                 }
1435         }
1436
1437
1438         /**
1439          * Heuristic for detecting files that *could* contain JavaScript instructions or
1440          * things that may look like HTML to a browser and are thus
1441          * potentially harmful. The present implementation will produce false positives in some situations.
1442          *
1443          * @param string $file Pathname to the temporary upload file
1444          * @param string $mime The mime type of the file
1445          * @param string $extension The extension of the file
1446          * @return bool true if the file contains something looking like embedded scripts
1447          */
1448         function detectScript($file, $mime, $extension) {
1449                 global $wgAllowTitlesInSVG;
1450
1451                 #ugly hack: for text files, always look at the entire file.
1452                 #For binarie field, just check the first K.
1453
1454                 if (strpos($mime,'text/')===0) $chunk = file_get_contents( $file );
1455                 else {
1456                         $fp = fopen( $file, 'rb' );
1457                         $chunk = fread( $fp, 1024 );
1458                         fclose( $fp );
1459                 }
1460
1461                 $chunk= strtolower( $chunk );
1462
1463                 if (!$chunk) return false;
1464
1465                 #decode from UTF-16 if needed (could be used for obfuscation).
1466                 if (substr($chunk,0,2)=="\xfe\xff") $enc= "UTF-16BE";
1467                 elseif (substr($chunk,0,2)=="\xff\xfe") $enc= "UTF-16LE";
1468                 else $enc= NULL;
1469
1470                 if ($enc) $chunk= iconv($enc,"ASCII//IGNORE",$chunk);
1471
1472                 $chunk= trim($chunk);
1473
1474                 #FIXME: convert from UTF-16 if necessarry!
1475
1476                 wfDebug("SpecialUpload::detectScript: checking for embedded scripts and HTML stuff\n");
1477
1478                 #check for HTML doctype
1479                 if (eregi("<!DOCTYPE *X?HTML",$chunk)) return true;
1480
1481                 /**
1482                 * Internet Explorer for Windows performs some really stupid file type
1483                 * autodetection which can cause it to interpret valid image files as HTML
1484                 * and potentially execute JavaScript, creating a cross-site scripting
1485                 * attack vectors.
1486                 *
1487                 * Apple's Safari browser also performs some unsafe file type autodetection
1488                 * which can cause legitimate files to be interpreted as HTML if the
1489                 * web server is not correctly configured to send the right content-type
1490                 * (or if you're really uploading plain text and octet streams!)
1491                 *
1492                 * Returns true if IE is likely to mistake the given file for HTML.
1493                 * Also returns true if Safari would mistake the given file for HTML
1494                 * when served with a generic content-type.
1495                 */
1496
1497                 $tags = array(
1498                         '<a href',
1499                         '<body',
1500                         '<head',
1501                         '<html',   #also in safari
1502                         '<img',
1503                         '<pre',
1504                         '<script', #also in safari
1505                         '<table'
1506                         );
1507                 if( ! $wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
1508                         $tags[] = '<title';
1509                 }
1510
1511                 foreach( $tags as $tag ) {
1512                         if( false !== strpos( $chunk, $tag ) ) {
1513                                 return true;
1514                         }
1515                 }
1516
1517                 /*
1518                 * look for javascript
1519                 */
1520
1521                 #resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1522                 $chunk = Sanitizer::decodeCharReferences( $chunk );
1523
1524                 #look for script-types
1525                 if (preg_match('!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim',$chunk)) return true;
1526
1527                 #look for html-style script-urls
1528                 if (preg_match('!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1529
1530                 #look for css-style script-urls
1531                 if (preg_match('!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1532
1533                 wfDebug("SpecialUpload::detectScript: no scripts found\n");
1534                 return false;
1535         }
1536
1537         function detectScriptInSvg( $filename ) {
1538                 $check = new XmlTypeCheck( $filename, array( $this, 'checkSvgScriptCallback' ) );
1539                 return $check->filterMatch;
1540         }
1541
1542         /**
1543          * @todo Replace this with a whitelist filter!
1544          */
1545         function checkSvgScriptCallback( $element, $attribs ) {
1546                 $stripped = $this->stripXmlNamespace( $element );
1547
1548                 if( $stripped == 'script' ) {
1549                         wfDebug( __METHOD__ . ": Found script element '$element' in uploaded file.\n" );
1550                         return true;
1551                 }
1552
1553                 foreach( $attribs as $attrib => $value ) {
1554                         $stripped = $this->stripXmlNamespace( $attrib );
1555                         if( substr( $stripped, 0, 2 ) == 'on' ) {
1556                                 wfDebug( __METHOD__ . ": Found script attribute '$attrib'='value' in uploaded file.\n" );
1557                                 return true;
1558                         }
1559                         if( $stripped == 'href' && strpos( strtolower( $value ), 'javascript:' ) !== false ) {
1560                                 wfDebug( __METHOD__ . ": Found script href attribute '$attrib'='$value' in uploaded file.\n" );
1561                                 return true;
1562                         }
1563                 }
1564         }
1565
1566         private function stripXmlNamespace( $name ) {
1567                 // 'http://www.w3.org/2000/svg:script' -> 'script'
1568                 $parts = explode( ':', strtolower( $name ) );
1569                 return array_pop( $parts );
1570         }
1571
1572         /**
1573          * Generic wrapper function for a virus scanner program.
1574          * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
1575          * $wgAntivirusRequired may be used to deny upload if the scan fails.
1576          *
1577          * @param string $file Pathname to the temporary upload file
1578          * @return mixed false if not virus is found, NULL if the scan fails or is disabled,
1579          *         or a string containing feedback from the virus scanner if a virus was found.
1580          *         If textual feedback is missing but a virus was found, this function returns true.
1581          */
1582         function detectVirus($file) {
1583                 global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
1584
1585                 if ( !$wgAntivirus ) {
1586                         wfDebug( __METHOD__.": virus scanner disabled\n");
1587                         return NULL;
1588                 }
1589
1590                 if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1591                         wfDebug( __METHOD__.": unknown virus scanner: $wgAntivirus\n" );
1592                         $wgOut->wrapWikiMsg( '<div class="error">$1</div>', array( 'virus-badscanner', $wgAntivirus ) );
1593                         return wfMsg('virus-unknownscanner') . " $wgAntivirus";
1594                 }
1595
1596                 # look up scanner configuration
1597                 $command = $wgAntivirusSetup[$wgAntivirus]["command"];
1598                 $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]["codemap"];
1599                 $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]["messagepattern"] ) ?
1600                         $wgAntivirusSetup[$wgAntivirus]["messagepattern"] : null;
1601
1602                 if ( strpos( $command,"%f" ) === false ) {
1603                         # simple pattern: append file to scan
1604                         $command .= " " . wfEscapeShellArg( $file );
1605                 } else {
1606                         # complex pattern: replace "%f" with file to scan
1607                         $command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
1608                 }
1609
1610                 wfDebug( __METHOD__.": running virus scan: $command \n" );
1611
1612                 # execute virus scanner
1613                 $exitCode = false;
1614
1615                 #NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1616                 #      that does not seem to be worth the pain.
1617                 #      Ask me (Duesentrieb) about it if it's ever needed.
1618                 $output = array();
1619                 if ( wfIsWindows() ) {
1620                         exec( "$command", $output, $exitCode );
1621                 } else {
1622                         exec( "$command 2>&1", $output, $exitCode );
1623                 }
1624
1625                 # map exit code to AV_xxx constants.
1626                 $mappedCode = $exitCode;
1627                 if ( $exitCodeMap ) {
1628                         if ( isset( $exitCodeMap[$exitCode] ) ) {
1629                                 $mappedCode = $exitCodeMap[$exitCode];
1630                         } elseif ( isset( $exitCodeMap["*"] ) ) {
1631                                 $mappedCode = $exitCodeMap["*"];
1632                         }
1633                 }
1634
1635                 if ( $mappedCode === AV_SCAN_FAILED ) {
1636                         # scan failed (code was mapped to false by $exitCodeMap)
1637                         wfDebug( __METHOD__.": failed to scan $file (code $exitCode).\n" );
1638
1639                         if ( $wgAntivirusRequired ) {
1640                                 return wfMsg('virus-scanfailed', array( $exitCode ) );
1641                         } else {
1642                                 return NULL;
1643                         }
1644                 } else if ( $mappedCode === AV_SCAN_ABORTED ) {
1645                         # scan failed because filetype is unknown (probably imune)
1646                         wfDebug( __METHOD__.": unsupported file type $file (code $exitCode).\n" );
1647                         return NULL;
1648                 } else if ( $mappedCode === AV_NO_VIRUS ) {
1649                         # no virus found
1650                         wfDebug( __METHOD__.": file passed virus scan.\n" );
1651                         return false;
1652                 } else {
1653                         $output = join( "\n", $output );
1654                         $output = trim( $output );
1655
1656                         if ( !$output ) {
1657                                 $output = true; #if there's no output, return true
1658                         } elseif ( $msgPattern ) {
1659                                 $groups = array();
1660                                 if ( preg_match( $msgPattern, $output, $groups ) ) {
1661                                         if ( $groups[1] ) {
1662                                                 $output = $groups[1];
1663                                         }
1664                                 }
1665                         }
1666
1667                         wfDebug( __METHOD__.": FOUND VIRUS! scanner feedback: $output \n" );
1668                         return $output;
1669                 }
1670         }
1671
1672         /**
1673          * Check if the temporary file is MacBinary-encoded, as some uploads
1674          * from Internet Explorer on Mac OS Classic and Mac OS X will be.
1675          * If so, the data fork will be extracted to a second temporary file,
1676          * which will then be checked for validity and either kept or discarded.
1677          *
1678          * @access private
1679          */
1680         function checkMacBinary() {
1681                 $macbin = new MacBinary( $this->mTempPath );
1682                 if( $macbin->isValid() ) {
1683                         $dataFile = tempnam( wfTempDir(), "WikiMacBinary" );
1684                         $dataHandle = fopen( $dataFile, 'wb' );
1685
1686                         wfDebug( "SpecialUpload::checkMacBinary: Extracting MacBinary data fork to $dataFile\n" );
1687                         $macbin->extractData( $dataHandle );
1688
1689                         $this->mTempPath = $dataFile;
1690                         $this->mFileSize = $macbin->dataForkLength();
1691
1692                         // We'll have to manually remove the new file if it's not kept.
1693                         $this->mRemoveTempFile = true;
1694                 }
1695                 $macbin->close();
1696         }
1697
1698         /**
1699          * If we've modified the upload file we need to manually remove it
1700          * on exit to clean up.
1701          * @access private
1702          */
1703         function cleanupTempFile() {
1704                 if ( $this->mRemoveTempFile && $this->mTempPath && file_exists( $this->mTempPath ) ) {
1705                         wfDebug( "SpecialUpload::cleanupTempFile: Removing temporary file {$this->mTempPath}\n" );
1706                         unlink( $this->mTempPath );
1707                 }
1708         }
1709
1710         /**
1711          * Check if there's an overwrite conflict and, if so, if restrictions
1712          * forbid this user from performing the upload.
1713          *
1714          * @return mixed true on success, WikiError on failure
1715          * @access private
1716          */
1717         function checkOverwrite( $name ) {
1718                 $img = wfFindFile( $name );
1719
1720                 $error = '';
1721                 if( $img ) {
1722                         global $wgUser, $wgOut;
1723                         if( $img->isLocal() ) {
1724                                 if( !self::userCanReUpload( $wgUser, $img->name ) ) {
1725                                         $error = 'fileexists-forbidden';
1726                                 }
1727                         } else {
1728                                 if( !$wgUser->isAllowed( 'reupload' ) ||
1729                                     !$wgUser->isAllowed( 'reupload-shared' ) ) {
1730                                         $error = "fileexists-shared-forbidden";
1731                                 }
1732                         }
1733                 }
1734
1735                 if( $error ) {
1736                         $errorText = wfMsg( $error, wfEscapeWikiText( $img->getName() ) );
1737                         return $errorText;
1738                 }
1739
1740                 // Rockin', go ahead and upload
1741                 return true;
1742         }
1743
1744          /**
1745          * Check if a user is the last uploader
1746          *
1747          * @param User $user
1748          * @param string $img, image name
1749          * @return bool
1750          */
1751         public static function userCanReUpload( User $user, $img ) {
1752                 if( $user->isAllowed( 'reupload' ) )
1753                         return true; // non-conditional
1754                 if( !$user->isAllowed( 'reupload-own' ) )
1755                         return false;
1756
1757                 $dbr = wfGetDB( DB_SLAVE );
1758                 $row = $dbr->selectRow('image',
1759                 /* SELECT */ 'img_user',
1760                 /* WHERE */ array( 'img_name' => $img )
1761                 );
1762                 if ( !$row )
1763                         return false;
1764
1765                 return $user->getId() == $row->img_user;
1766         }
1767
1768         /**
1769          * Display an error with a wikitext description
1770          */
1771         function showError( $description ) {
1772                 global $wgOut;
1773                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
1774                 $wgOut->setRobotPolicy( "noindex,nofollow" );
1775                 $wgOut->setArticleRelated( false );
1776                 $wgOut->enableClientCache( false );
1777                 $wgOut->addWikiText( $description );
1778         }
1779
1780         /**
1781          * Get the initial image page text based on a comment and optional file status information
1782          */
1783         static function getInitialPageText( $comment, $license, $copyStatus, $source ) {
1784                 global $wgUseCopyrightUpload;
1785                 if ( $wgUseCopyrightUpload ) {
1786                         if ( $license != '' ) {
1787                                 $licensetxt = '== ' . wfMsgForContent( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1788                         }
1789                         $pageText = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n" .
1790                           '== ' . wfMsgForContent ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
1791                           "$licensetxt" .
1792                           '== ' . wfMsgForContent ( 'filesource' ) . " ==\n" . $source ;
1793                 } else {
1794                         if ( $license != '' ) {
1795                                 $filedesc = $comment == '' ? '' : '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n";
1796                                  $pageText = $filedesc .
1797                                          '== ' . wfMsgForContent ( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1798                         } else {
1799                                 $pageText = $comment;
1800                         }
1801                 }
1802                 return $pageText;
1803         }
1804
1805         /**
1806          * If there are rows in the deletion log for this file, show them,
1807          * along with a nice little note for the user
1808          *
1809          * @param OutputPage $out
1810          * @param string filename
1811          */
1812         private function showDeletionLog( $out, $filename ) {
1813                 global $wgUser;
1814                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
1815                 $pager = new LogPager( $loglist, 'delete', false, $filename );
1816                 if( $pager->getNumRows() > 0 ) {
1817                         $out->addHTML( '<div class="mw-warning-with-logexcerpt">' );
1818                         $out->addWikiMsg( 'upload-wasdeleted' );
1819                         $out->addHTML(
1820                                 $loglist->beginLogEventsList() .
1821                                 $pager->getBody() .
1822                                 $loglist->endLogEventsList()
1823                         );
1824                         $out->addHTML( '</div>' );
1825                 }
1826         }
1827 }