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_LENGHT_PARTNAME = 4;
  27         const ILLEGAL_FILENAME = 5;
  28         const PROTECTED_PAGE = 6;
  29         const OVERWRITE_EXISTING_FILE = 7;
  30         const FILETYPE_MISSING = 8;
  31         const FILETYPE_BADTYPE = 9;
  32         const VERIFICATION_ERROR = 10;
  33         const UPLOAD_VERIFICATION_ERROR = 11;
  34         const UPLOAD_WARNING = 12;
  35         const INTERNAL_ERROR = 13;
  36
  37         /**#@+
  38          * @access private
  39          */
  40         var $mComment, $mLicense, $mIgnoreWarning, $mCurlError;
  41         var $mDestName, $mTempPath, $mFileSize, $mFileProps;
  42         var $mCopyrightStatus, $mCopyrightSource, $mReUpload, $mAction, $mUploadClicked;
  43         var $mSrcName, $mSessionKey, $mStashed, $mDesiredDestName, $mRemoveTempFile, $mSourceType;
  44         var $mDestWarningAck, $mCurlDestHandle;
  45         var $mLocalFile;
  46
  47         # Placeholders for text injection by hooks (must be HTML)
  48         # extensions should take care to _append_ to the present value
  49         var $uploadFormTextTop;
  50         var $uploadFormTextAfterSummary;
  51
  52         const SESSION_VERSION = 1;
  53         /**#@-*/
  54
  55         /**
  56          * Constructor : initialise object
  57          * Get data POSTed through the form and assign them to the object
  58          * @param $request Data posted.
  59          */
  60         function UploadForm( &$request ) {
  61                 global $wgAllowCopyUploads;
  62                 $this->mDesiredDestName   = $request->getText( 'wpDestFile' );
  63                 $this->mIgnoreWarning     = $request->getCheck( 'wpIgnoreWarning' );
  64                 $this->mComment           = $request->getText( 'wpUploadDescription' );
  65
  66                 if( !$request->wasPosted() ) {
  67                         # GET requests just give the main form; no data except destination
  68                         # filename and description
  69                         return;
  70                 }
  71
  72                 # Placeholders for text injection by hooks (empty per default)
  73                 $this->uploadFormTextTop = "";
  74                 $this->uploadFormTextAfterSummary = "";
  75
  76                 $this->mReUpload          = $request->getCheck( 'wpReUpload' );
  77                 $this->mUploadClicked     = $request->getCheck( 'wpUpload' );
  78
  79                 $this->mLicense           = $request->getText( 'wpLicense' );
  80                 $this->mCopyrightStatus   = $request->getText( 'wpUploadCopyStatus' );
  81                 $this->mCopyrightSource   = $request->getText( 'wpUploadSource' );
  82                 $this->mWatchthis         = $request->getBool( 'wpWatchthis' );
  83                 $this->mSourceType        = $request->getText( 'wpSourceType' );
  84                 $this->mDestWarningAck    = $request->getText( 'wpDestFileWarningAck' );
  85
  86                 $this->mAction            = $request->getVal( 'action' );
  87
  88                 $this->mSessionKey        = $request->getInt( 'wpSessionKey' );
  89                 if( !empty( $this->mSessionKey ) &&
  90                         isset( $_SESSION['wsUploadData'][$this->mSessionKey]['version'] ) &&
  91                         $_SESSION['wsUploadData'][$this->mSessionKey]['version'] == self::SESSION_VERSION ) {
  92                         /**
  93                          * Confirming a temporarily stashed upload.
  94                          * We don't want path names to be forged, so we keep
  95                          * them in the session on the server and just give
  96                          * an opaque key to the user agent.
  97                          */
  98                         $data = $_SESSION['wsUploadData'][$this->mSessionKey];
  99                         $this->mTempPath         = $data['mTempPath'];
 100                         $this->mFileSize         = $data['mFileSize'];
 101                         $this->mSrcName          = $data['mSrcName'];
 102                         $this->mFileProps        = $data['mFileProps'];
 103                         $this->mCurlError        = 0/*UPLOAD_ERR_OK*/;
 104                         $this->mStashed          = true;
 105                         $this->mRemoveTempFile   = false;
 106                 } else {
 107                         /**
 108                          *Check for a newly uploaded file.
 109                          */
 110                         if( $wgAllowCopyUploads && $this->mSourceType == 'web' ) {
 111                                 $this->initializeFromUrl( $request );
 112                         } else {
 113                                 $this->initializeFromUpload( $request );
 114                         }
 115                 }
 116         }
 117
 118         /**
 119          * Initialize the uploaded file from PHP data
 120          * @access private
 121          */
 122         function initializeFromUpload( $request ) {
 123                 $this->mTempPath       = $request->getFileTempName( 'wpUploadFile' );
 124                 $this->mFileSize       = $request->getFileSize( 'wpUploadFile' );
 125                 $this->mSrcName        = $request->getFileName( 'wpUploadFile' );
 126                 $this->mCurlError      = $request->getUploadError( 'wpUploadFile' );
 127                 $this->mSessionKey     = false;
 128                 $this->mStashed        = false;
 129                 $this->mRemoveTempFile = false; // PHP will handle this
 130         }
 131
 132         /**
 133          * Copy a web file to a temporary file
 134          * @access private
 135          */
 136         function initializeFromUrl( $request ) {
 137                 global $wgTmpDirectory;
 138                 $url = $request->getText( 'wpUploadFileURL' );
 139                 $local_file = tempnam( $wgTmpDirectory, 'WEBUPLOAD' );
 140
 141                 $this->mTempPath       = $local_file;
 142                 $this->mFileSize       = 0; # Will be set by curlCopy
 143                 $this->mCurlError      = $this->curlCopy( $url, $local_file );
 144                 $pathParts             = explode( '/', $url );
 145                 $this->mSrcName        = array_pop( $pathParts );
 146                 $this->mSessionKey     = false;
 147                 $this->mStashed        = false;
 148
 149                 // PHP won't auto-cleanup the file
 150                 $this->mRemoveTempFile = file_exists( $local_file );
 151         }
 152
 153         /**
 154          * Safe copy from URL
 155          * Returns true if there was an error, false otherwise
 156          */
 157         private function curlCopy( $url, $dest ) {
 158                 global $wgUser, $wgOut;
 159
 160                 if( !$wgUser->isAllowed( 'upload_by_url' ) ) {
 161                         $wgOut->permissionRequired( 'upload_by_url' );
 162                         return true;
 163                 }
 164
 165                 # Maybe remove some pasting blanks :-)
 166                 $url =  trim( $url );
 167                 if( stripos($url, 'http://') !== 0 && stripos($url, 'ftp://') !== 0 ) {
 168                         # Only HTTP or FTP URLs
 169                         $wgOut->showErrorPage( 'upload-proto-error', 'upload-proto-error-text' );
 170                         return true;
 171                 }
 172
 173                 # Open temporary file
 174                 $this->mCurlDestHandle = @fopen( $this->mTempPath, "wb" );
 175                 if( $this->mCurlDestHandle === false ) {
 176                         # Could not open temporary file to write in
 177                         $wgOut->showErrorPage( 'upload-file-error', 'upload-file-error-text');
 178                         return true;
 179                 }
 180
 181                 $ch = curl_init();
 182                 curl_setopt( $ch, CURLOPT_HTTP_VERSION, 1.0); # Probably not needed, but apparently can work around some bug
 183                 curl_setopt( $ch, CURLOPT_TIMEOUT, 10); # 10 seconds timeout
 184                 curl_setopt( $ch, CURLOPT_LOW_SPEED_LIMIT, 512); # 0.5KB per second minimum transfer speed
 185                 curl_setopt( $ch, CURLOPT_URL, $url);
 186                 curl_setopt( $ch, CURLOPT_WRITEFUNCTION, array( $this, 'uploadCurlCallback' ) );
 187                 curl_exec( $ch );
 188                 $error = curl_errno( $ch ) ? true : false;
 189                 $errornum =  curl_errno( $ch );
 190                 // if ( $error ) print curl_error ( $ch ) ; # Debugging output
 191                 curl_close( $ch );
 192
 193                 fclose( $this->mCurlDestHandle );
 194                 unset( $this->mCurlDestHandle );
 195                 if( $error ) {
 196                         unlink( $dest );
 197                         if( wfEmptyMsg( "upload-curl-error$errornum", wfMsg("upload-curl-error$errornum") ) )
 198                                 $wgOut->showErrorPage( 'upload-misc-error', 'upload-misc-error-text' );
 199                         else
 200                                 $wgOut->showErrorPage( "upload-curl-error$errornum", "upload-curl-error$errornum-text" );
 201                 }
 202
 203                 return $error;
 204         }
 205
 206         /**
 207          * Callback function for CURL-based web transfer
 208          * Write data to file unless we've passed the length limit;
 209          * if so, abort immediately.
 210          * @access private
 211          */
 212         function uploadCurlCallback( $ch, $data ) {
 213                 global $wgMaxUploadSize;
 214                 $length = strlen( $data );
 215                 $this->mFileSize += $length;
 216                 if( $this->mFileSize > $wgMaxUploadSize ) {
 217                         return 0;
 218                 }
 219                 fwrite( $this->mCurlDestHandle, $data );
 220                 return $length;
 221         }
 222
 223         /**
 224          * Start doing stuff
 225          * @access public
 226          */
 227         function execute() {
 228                 global $wgUser, $wgOut;
 229                 global $wgEnableUploads;
 230
 231                 # Check uploading enabled
 232                 if( !$wgEnableUploads ) {
 233                         $wgOut->showErrorPage( 'uploaddisabled', 'uploaddisabledtext', array( $this->mDesiredDestName ) );
 234                         return;
 235                 }
 236
 237                 # Check permissions
 238                 if( !$wgUser->isAllowed( 'upload' ) ) {
 239                         if( !$wgUser->isLoggedIn() ) {
 240                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
 241                         } else {
 242                                 $wgOut->permissionRequired( 'upload' );
 243                         }
 244                         return;
 245                 }
 246
 247                 # Check blocks
 248                 if( $wgUser->isBlocked() ) {
 249                         $wgOut->blockedPage();
 250                         return;
 251                 }
 252
 253                 if( wfReadOnly() ) {
 254                         $wgOut->readOnlyPage();
 255                         return;
 256                 }
 257
 258                 if( $this->mReUpload ) {
 259                         if( !$this->unsaveUploadedFile() ) {
 260                                 return;
 261                         }
 262                         # Because it is probably checked and shouldn't be
 263                         $this->mIgnoreWarning = false;
 264
 265                         $this->mainUploadForm();
 266                 } else if( 'submit' == $this->mAction || $this->mUploadClicked ) {
 267                         $this->processUpload();
 268                 } else {
 269                         $this->mainUploadForm();
 270                 }
 271
 272                 $this->cleanupTempFile();
 273         }
 274
 275         /**
 276          * Do the upload
 277          * Checks are made in SpecialUpload::execute()
 278          *
 279          * @access private
 280          */
 281         function processUpload(){
 282                 global $wgUser, $wgOut, $wgFileExtensions, $wgLang;
 283                 $details = null;
 284                 $value = null;
 285                 $value = $this->internalProcessUpload( $details );
 286
 287                 switch($value) {
 288                         case self::SUCCESS:
 289                                 $wgOut->redirect( $this->mLocalFile->getTitle()->getFullURL() );
 290                                 break;
 291
 292                         case self::BEFORE_PROCESSING:
 293                                 break;
 294
 295                         case self::LARGE_FILE_SERVER:
 296                                 $this->mainUploadForm( wfMsgHtml( 'largefileserver' ) );
 297                                 break;
 298
 299                         case self::EMPTY_FILE:
 300                                 $this->mainUploadForm( wfMsgHtml( 'emptyfile' ) );
 301                                 break;
 302
 303                         case self::MIN_LENGHT_PARTNAME:
 304                                 $this->mainUploadForm( wfMsgHtml( 'minlength1' ) );
 305                                 break;
 306
 307                         case self::ILLEGAL_FILENAME:
 308                                 $filtered = $details['filtered'];
 309                                 $this->uploadError( wfMsgWikiHtml( 'illegalfilename', htmlspecialchars( $filtered ) ) );
 310                                 break;
 311
 312                         case self::PROTECTED_PAGE:
 313                                 $wgOut->showPermissionsErrorPage( $details['permissionserrors'] );
 314                                 break;
 315
 316                         case self::OVERWRITE_EXISTING_FILE:
 317                                 $errorText = $details['overwrite'];
 318                                 $this->uploadError( $wgOut->parse( $errorText ) );
 319                                 break;
 320
 321                         case self::FILETYPE_MISSING:
 322                                 $this->uploadError( wfMsgExt( 'filetype-missing', array ( 'parseinline' ) ) );
 323                                 break;
 324
 325                         case self::FILETYPE_BADTYPE:
 326                                 $finalExt = $details['finalExt'];
 327                                 $this->uploadError(
 328                                         wfMsgExt( 'filetype-banned-type',
 329                                                 array( 'parseinline' ),
 330                                                 htmlspecialchars( $finalExt ),
 331                                                 $wgLang->commaList( $wgFileExtensions ),
 332                                                 $wgLang->formatNum( count($wgFileExtensions) )
 333                                         )
 334                                 );
 335                                 break;
 336
 337                         case self::VERIFICATION_ERROR:
 338                                 $veri = $details['veri'];
 339                                 $this->uploadError( $veri->toString() );
 340                                 break;
 341
 342                         case self::UPLOAD_VERIFICATION_ERROR:
 343                                 $error = $details['error'];
 344                                 $this->uploadError( $error );
 345                                 break;
 346
 347                         case self::UPLOAD_WARNING:
 348                                 $warning = $details['warning'];
 349                                 $this->uploadWarning( $warning );
 350                                 break;
 351
 352                         case self::INTERNAL_ERROR:
 353                                 $internal = $details['internal'];
 354                                 $this->showError( $internal );
 355                                 break;
 356
 357                         default:
 358                                 throw new MWException( __METHOD__ . ": Unknown value `{$value}`" );
 359                 }
 360         }
 361
 362         /**
 363          * Really do the upload
 364          * Checks are made in SpecialUpload::execute()
 365          *
 366          * @param array $resultDetails contains result-specific dict of additional values
 367          *
 368          * @access private
 369          */
 370         function internalProcessUpload( &$resultDetails ) {
 371                 global $wgUser;
 372
 373                 if( !wfRunHooks( 'UploadForm:BeforeProcessing', array( &$this ) ) )
 374                 {
 375                         wfDebug( "Hook 'UploadForm:BeforeProcessing' broke processing the file." );
 376                         return self::BEFORE_PROCESSING;
 377                 }
 378
 379                 /**
 380                  * If there was no filename or a zero size given, give up quick.
 381                  */
 382                 if( trim( $this->mSrcName ) == '' || empty( $this->mFileSize ) ) {
 383                         return self::EMPTY_FILE;
 384                 }
 385
 386                 /* Check for curl error */
 387                 if( $this->mCurlError ) {
 388                         return self::BEFORE_PROCESSING;
 389                 }
 390
 391                 /**
 392                  * Chop off any directories in the given filename. Then
 393                  * filter out illegal characters, and try to make a legible name
 394                  * out of it. We'll strip some silently that Title would die on.
 395                  */
 396                 if( $this->mDesiredDestName ) {
 397                         $basename = $this->mDesiredDestName;
 398                 } else {
 399                         $basename = $this->mSrcName;
 400                 }
 401                 $filtered = wfStripIllegalFilenameChars( $basename );
 402
 403                 /**
 404                  * We'll want to blacklist against *any* 'extension', and use
 405                  * only the final one for the whitelist.
 406                  */
 407                 list( $partname, $ext ) = $this->splitExtensions( $filtered );
 408
 409                 if( count( $ext ) ) {
 410                         $finalExt = trim( $ext[count( $ext ) - 1] );
 411                 } else {
 412                         $finalExt = '';
 413                 }
 414
 415                 # If there was more than one "extension", reassemble the base
 416                 # filename to prevent bogus complaints about length
 417                 if( count( $ext ) > 1 ) {
 418                         for( $i = 0; $i < count( $ext ) - 1; $i++ )
 419                                 $partname .= '.' . $ext[$i];
 420                 }
 421
 422                 if( strlen( $partname ) < 1 ) {
 423                         return self::MIN_LENGHT_PARTNAME;
 424                 }
 425
 426                 $nt = Title::makeTitleSafe( NS_FILE, $filtered );
 427                 if( is_null( $nt ) ) {
 428                         $resultDetails = array( 'filtered' => $filtered );
 429                         return self::ILLEGAL_FILENAME;
 430                 }
 431                 $this->mLocalFile = wfLocalFile( $nt );
 432                 $this->mDestName = $this->mLocalFile->getName();
 433
 434                 /**
 435                  * If the image is protected, non-sysop users won't be able
 436                  * to modify it by uploading a new revision.
 437                  */
 438                 $permErrors = $nt->getUserPermissionsErrors( 'edit', $wgUser );
 439                 $permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $wgUser );
 440                 $permErrorsCreate = ( $nt->exists() ? array() : $nt->getUserPermissionsErrors( 'create', $wgUser ) );
 441
 442                 if( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
 443                         // merge all the problems into one list, avoiding duplicates
 444                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
 445                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );
 446                         $resultDetails = array( 'permissionserrors' => $permErrors );
 447                         return self::PROTECTED_PAGE;
 448                 }
 449
 450                 /**
 451                  * In some cases we may forbid overwriting of existing files.
 452                  */
 453                 $overwrite = $this->checkOverwrite( $this->mDestName );
 454                 if( $overwrite !== true ) {
 455                         $resultDetails = array( 'overwrite' => $overwrite );
 456                         return self::OVERWRITE_EXISTING_FILE;
 457                 }
 458
 459                 /* Don't allow users to override the blacklist (check file extension) */
 460                 global $wgCheckFileExtensions, $wgStrictFileExtensions;
 461                 global $wgFileExtensions, $wgFileBlacklist;
 462                 if ($finalExt == '') {
 463                         return self::FILETYPE_MISSING;
 464                 } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) ||
 465                                 ($wgCheckFileExtensions && $wgStrictFileExtensions &&
 466                                         !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) ) {
 467                         $resultDetails = array( 'finalExt' => $finalExt );
 468                         return self::FILETYPE_BADTYPE;
 469                 }
 470
 471                 /**
 472                  * Look at the contents of the file; if we can recognize the
 473                  * type but it's corrupt or data of the wrong type, we should
 474                  * probably not accept it.
 475                  */
 476                 if( !$this->mStashed ) {
 477                         $this->mFileProps = File::getPropsFromPath( $this->mTempPath, $finalExt );
 478                         $this->checkMacBinary();
 479                         $veri = $this->verify( $this->mTempPath, $finalExt );
 480
 481                         if( $veri !== true ) { //it's a wiki error...
 482                                 $resultDetails = array( 'veri' => $veri );
 483                                 return self::VERIFICATION_ERROR;
 484                         }
 485
 486                         /**
 487                          * Provide an opportunity for extensions to add further checks
 488                          */
 489                         $error = '';
 490                         if( !wfRunHooks( 'UploadVerification',
 491                                         array( $this->mDestName, $this->mTempPath, &$error ) ) ) {
 492                                 $resultDetails = array( 'error' => $error );
 493                                 return self::UPLOAD_VERIFICATION_ERROR;
 494                         }
 495                 }
 496
 497
 498                 /**
 499                  * Check for non-fatal conditions
 500                  */
 501                 if ( ! $this->mIgnoreWarning ) {
 502                         $warning = '';
 503
 504                         global $wgCapitalLinks;
 505                         if( $wgCapitalLinks ) {
 506                                 $filtered = ucfirst( $filtered );
 507                         }
 508                         if( $basename != $filtered ) {
 509                                 $warning .=  '<li>'.wfMsgHtml( 'badfilename', htmlspecialchars( $this->mDestName ) ).'</li>';
 510                         }
 511
 512                         global $wgCheckFileExtensions;
 513                         if ( $wgCheckFileExtensions ) {
 514                                 if ( !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) {
 515                                         global $wgLang;
 516                                         $warning .= '<li>' .
 517                                         wfMsgExt( 'filetype-unwanted-type',
 518                                                 array( 'parseinline' ),
 519                                                 htmlspecialchars( $finalExt ),
 520                                                 $wgLang->commaList( $wgFileExtensions ),
 521                                                 $wgLang->formatNum( count($wgFileExtensions) )
 522                                         ) . '</li>';
 523                                 }
 524                         }
 525
 526                         global $wgUploadSizeWarning;
 527                         if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) {
 528                                 $skin = $wgUser->getSkin();
 529                                 $wsize = $skin->formatSize( $wgUploadSizeWarning );
 530                                 $asize = $skin->formatSize( $this->mFileSize );
 531                                 $warning .= '<li>' . wfMsgHtml( 'large-file', $wsize, $asize ) . '</li>';
 532                         }
 533                         if ( $this->mFileSize == 0 ) {
 534                                 $warning .= '<li>'.wfMsgHtml( 'emptyfile' ).'</li>';
 535                         }
 536
 537                         if ( !$this->mDestWarningAck ) {
 538                                 $warning .= self::getExistsWarning( $this->mLocalFile );
 539                         }
 540
 541                         $warning .= $this->getDupeWarning( $this->mTempPath, $finalExt );
 542
 543                         if( $warning != '' ) {
 544                                 /**
 545                                  * Stash the file in a temporary location; the user can choose
 546                                  * to let it through and we'll complete the upload then.
 547                                  */
 548                                 $resultDetails = array( 'warning' => $warning );
 549                                 return self::UPLOAD_WARNING;
 550                         }
 551                 }
 552
 553                 /**
 554                  * Try actually saving the thing...
 555                  * It will show an error form on failure.
 556                  */
 557                 $pageText = self::getInitialPageText( $this->mComment, $this->mLicense,
 558                         $this->mCopyrightStatus, $this->mCopyrightSource );
 559
 560                 $status = $this->mLocalFile->upload( $this->mTempPath, $this->mComment, $pageText,
 561                         File::DELETE_SOURCE, $this->mFileProps );
 562                 if ( !$status->isGood() ) {
 563                         $resultDetails = array( 'internal' => $status->getWikiText() );
 564                         return self::INTERNAL_ERROR;
 565                 } else {
 566                         if ( $this->mWatchthis ) {
 567                                 global $wgUser;
 568                                 $wgUser->addWatch( $this->mLocalFile->getTitle() );
 569                         }
 570                         // Success, redirect to description page
 571                         $img = null; // @todo: added to avoid passing a ref to null - should this be defined somewhere?
 572                         wfRunHooks( 'UploadComplete', array( &$this ) );
 573                         return self::SUCCESS;
 574                 }
 575         }
 576
 577         /**
 578          * Do existence checks on a file and produce a warning
 579          * This check is static and can be done pre-upload via AJAX
 580          * Returns an HTML fragment consisting of one or more LI elements if there is a warning
 581          * Returns an empty string if there is no warning
 582          */
 583         static function getExistsWarning( $file ) {
 584                 global $wgUser, $wgContLang;
 585                 // Check for uppercase extension. We allow these filenames but check if an image
 586                 // with lowercase extension exists already
 587                 $warning = '';
 588                 $align = $wgContLang->isRtl() ? 'left' : 'right';
 589
 590                 if( strpos( $file->getName(), '.' ) == false ) {
 591                         $partname = $file->getName();
 592                         $rawExtension = '';
 593                 } else {
 594                         $n = strrpos( $file->getName(), '.' );
 595                         $rawExtension = substr( $file->getName(), $n + 1 );
 596                         $partname = substr( $file->getName(), 0, $n );
 597                 }
 598
 599                 $sk = $wgUser->getSkin();
 600
 601                 if ( $rawExtension != $file->getExtension() ) {
 602                         // We're not using the normalized form of the extension.
 603                         // Normal form is lowercase, using most common of alternate
 604                         // extensions (eg 'jpg' rather than 'JPEG').
 605                         //
 606                         // Check for another file using the normalized form...
 607                         $nt_lc = Title::makeTitle( NS_FILE, $partname . '.' . $file->getExtension() );
 608                         $file_lc = wfLocalFile( $nt_lc );
 609                 } else {
 610                         $file_lc = false;
 611                 }
 612
 613                 if( $file->exists() ) {
 614                         $dlink = $sk->makeKnownLinkObj( $file->getTitle() );
 615                         if ( $file->allowInlineDisplay() ) {
 616                                 $dlink2 = $sk->makeImageLinkObj( $file->getTitle(), wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 617                                         $file->getName(), $align, array(), false, true );
 618                         } elseif ( !$file->allowInlineDisplay() && $file->isSafeFile() ) {
 619                                 $icon = $file->iconThumb();
 620                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 621                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 622                         } else {
 623                                 $dlink2 = '';
 624                         }
 625
 626                         $warning .= '<li>' . wfMsgExt( 'fileexists', array('parseinline','replaceafter'), $dlink ) . '</li>' . $dlink2;
 627
 628                 } elseif( $file->getTitle()->getArticleID() ) {
 629                         $lnk = $sk->makeKnownLinkObj( $file->getTitle(), '', 'redirect=no' );
 630                         $warning .= '<li>' . wfMsgExt( 'filepageexists', array( 'parseinline', 'replaceafter' ), $lnk ) . '</li>';
 631                 } elseif ( $file_lc && $file_lc->exists() ) {
 632                         # Check if image with lowercase extension exists.
 633                         # It's not forbidden but in 99% it makes no sense to upload the same filename with uppercase extension
 634                         $dlink = $sk->makeKnownLinkObj( $nt_lc );
 635                         if ( $file_lc->allowInlineDisplay() ) {
 636                                 $dlink2 = $sk->makeImageLinkObj( $nt_lc, wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 637                                         $nt_lc->getText(), $align, array(), false, true );
 638                         } elseif ( !$file_lc->allowInlineDisplay() && $file_lc->isSafeFile() ) {
 639                                 $icon = $file_lc->iconThumb();
 640                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 641                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 642                         } else {
 643                                 $dlink2 = '';
 644                         }
 645
 646                         $warning .= '<li>' .
 647                                 wfMsgExt( 'fileexists-extension', 'parsemag',
 648                                         $file->getTitle()->getPrefixedText(), $dlink ) .
 649                                 '</li>' . $dlink2;
 650
 651                 } elseif ( ( substr( $partname , 3, 3 ) == 'px-' || substr( $partname , 2, 3 ) == 'px-' )
 652                         && ereg( "[0-9]{2}" , substr( $partname , 0, 2) ) )
 653                 {
 654                         # Check for filenames like 50px- or 180px-, these are mostly thumbnails
 655                         $nt_thb = Title::newFromText( substr( $partname , strpos( $partname , '-' ) +1 ) . '.' . $rawExtension );
 656                         $file_thb = wfLocalFile( $nt_thb );
 657                         if ($file_thb->exists() ) {
 658                                 # Check if an image without leading '180px-' (or similiar) exists
 659                                 $dlink = $sk->makeKnownLinkObj( $nt_thb);
 660                                 if ( $file_thb->allowInlineDisplay() ) {
 661                                         $dlink2 = $sk->makeImageLinkObj( $nt_thb,
 662                                                 wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 663                                                 $nt_thb->getText(), $align, array(), false, true );
 664                                 } elseif ( !$file_thb->allowInlineDisplay() && $file_thb->isSafeFile() ) {
 665                                         $icon = $file_thb->iconThumb();
 666                                         $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 667                                                 $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' .
 668                                                 $dlink . '</div>';
 669                                 } else {
 670                                         $dlink2 = '';
 671                                 }
 672
 673                                 $warning .= '<li>' . wfMsgExt( 'fileexists-thumbnail-yes', 'parsemag', $dlink ) .
 674                                         '</li>' . $dlink2;
 675                         } else {
 676                                 # Image w/o '180px-' does not exists, but we do not like these filenames
 677                                 $warning .= '<li>' . wfMsgExt( 'file-thumbnail-no', 'parseinline' ,
 678                                         substr( $partname , 0, strpos( $partname , '-' ) +1 ) ) . '</li>';
 679                         }
 680                 }
 681
 682                 $filenamePrefixBlacklist = self::getFilenamePrefixBlacklist();
 683                 # Do the match
 684                 foreach( $filenamePrefixBlacklist as $prefix ) {
 685                         if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
 686                                 $warning .= '<li>' . wfMsgExt( 'filename-bad-prefix', 'parseinline', $prefix ) . '</li>';
 687                                 break;
 688                         }
 689                 }
 690
 691                 if ( $file->wasDeleted() && !$file->exists() ) {
 692                         # If the file existed before and was deleted, warn the user of this
 693                         # Don't bother doing so if the file exists now, however
 694                         $ltitle = SpecialPage::getTitleFor( 'Log' );
 695                         $llink = $sk->makeKnownLinkObj( $ltitle, wfMsgHtml( 'deletionlog' ),
 696                                 'type=delete&page=' . $file->getTitle()->getPrefixedUrl() );
 697                         $warning .= '<li>' . wfMsgWikiHtml( 'filewasdeleted', $llink ) . '</li>';
 698                 }
 699                 return $warning;
 700         }
 701
 702         /**
 703          * Get a list of warnings
 704          *
 705          * @param string local filename, e.g. 'file exists', 'non-descriptive filename'
 706          * @return array list of warning messages
 707          */
 708         static function ajaxGetExistsWarning( $filename ) {
 709                 $file = wfFindFile( $filename );
 710                 if( !$file ) {
 711                         // Force local file so we have an object to do further checks against
 712                         // if there isn't an exact match...
 713                         $file = wfLocalFile( $filename );
 714                 }
 715                 $s = '&nbsp;';
 716                 if ( $file ) {
 717                         $warning = self::getExistsWarning( $file );
 718                         if ( $warning !== '' ) {
 719                                 $s = "<ul>$warning</ul>";
 720                         }
 721                 }
 722                 return $s;
 723         }
 724
 725         /**
 726          * Render a preview of a given license for the AJAX preview on upload
 727          *
 728          * @param string $license
 729          * @return string
 730          */
 731         public static function ajaxGetLicensePreview( $license ) {
 732                 global $wgParser, $wgUser;
 733                 $text = '{{' . $license . '}}';
 734                 $title = Title::makeTitle( NS_FILE, 'Sample.jpg' );
 735                 $options = ParserOptions::newFromUser( $wgUser );
 736
 737                 // Expand subst: first, then live templates...
 738                 $text = $wgParser->preSaveTransform( $text, $title, $wgUser, $options );
 739                 $output = $wgParser->parse( $text, $title, $options );
 740
 741                 return $output->getText();
 742         }
 743
 744         /**
 745          * Check for duplicate files and throw up a warning before the upload
 746          * completes.
 747          */
 748         function getDupeWarning( $tempfile, $extension ) {
 749                 $hash = File::sha1Base36( $tempfile );
 750                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 751                 $archivedImage = new ArchivedFile( null, 0, $hash.".$extension" );
 752                 if( $dupes ) {
 753                         global $wgOut;
 754                         $msg = "<gallery>";
 755                         foreach( $dupes as $file ) {
 756                                 $title = $file->getTitle();
 757                                 $msg .= $title->getPrefixedText() .
 758                                         "|" . $title->getText() . "\n";
 759                         }
 760                         $msg .= "</gallery>";
 761                         return "<li>" .
 762                                 wfMsgExt( "file-exists-duplicate", array( "parse" ), count( $dupes ) ) .
 763                                 $wgOut->parse( $msg ) .
 764                                 "</li>\n";
 765                 } elseif ( $archivedImage->getID() > 0 ) {
 766                         global $wgOut;
 767                         $name = Title::makeTitle( NS_FILE, $archivedImage->getName() )->getPrefixedText();
 768                         return Xml::tags( 'li', null, wfMsgExt( 'file-deleted-duplicate', array( 'parseinline' ), array( $name ) ) );
 769                 } else {
 770                         return '';
 771                 }
 772         }
 773
 774         /**
 775          * Get a list of blacklisted filename prefixes from [[MediaWiki:filename-prefix-blacklist]]
 776          *
 777          * @return array list of prefixes
 778          */
 779         public static function getFilenamePrefixBlacklist() {
 780                 $blacklist = array();
 781                 $message = wfMsgForContent( 'filename-prefix-blacklist' );
 782                 if( $message && !( wfEmptyMsg( 'filename-prefix-blacklist', $message ) || $message == '-' ) ) {
 783                         $lines = explode( "\n", $message );
 784                         foreach( $lines as $line ) {
 785                                 // Remove comment lines
 786                                 $comment = substr( trim( $line ), 0, 1 );
 787                                 if ( $comment == '#' || $comment == '' ) {
 788                                         continue;
 789                                 }
 790                                 // Remove additional comments after a prefix
 791                                 $comment = strpos( $line, '#' );
 792                                 if ( $comment > 0 ) {
 793                                         $line = substr( $line, 0, $comment-1 );
 794                                 }
 795                                 $blacklist[] = trim( $line );
 796                         }
 797                 }
 798                 return $blacklist;
 799         }
 800
 801         /**
 802          * Stash a file in a temporary directory for later processing
 803          * after the user has confirmed it.
 804          *
 805          * If the user doesn't explicitly cancel or accept, these files
 806          * can accumulate in the temp directory.
 807          *
 808          * @param string $saveName - the destination filename
 809          * @param string $tempName - the source temporary file to save
 810          * @return string - full path the stashed file, or false on failure
 811          * @access private
 812          */
 813         function saveTempUploadedFile( $saveName, $tempName ) {
 814                 global $wgOut;
 815                 $repo = RepoGroup::singleton()->getLocalRepo();
 816                 $status = $repo->storeTemp( $saveName, $tempName );
 817                 if ( !$status->isGood() ) {
 818                         $this->showError( $status->getWikiText() );
 819                         return false;
 820                 } else {
 821                         return $status->value;
 822                 }
 823         }
 824
 825         /**
 826          * Stash a file in a temporary directory for later processing,
 827          * and save the necessary descriptive info into the session.
 828          * Returns a key value which will be passed through a form
 829          * to pick up the path info on a later invocation.
 830          *
 831          * @return int
 832          * @access private
 833          */
 834         function stashSession() {
 835                 $stash = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath );
 836
 837                 if( !$stash ) {
 838                         # Couldn't save the file.
 839                         return false;
 840                 }
 841
 842                 $key = mt_rand( 0, 0x7fffffff );
 843                 $_SESSION['wsUploadData'][$key] = array(
 844                         'mTempPath'       => $stash,
 845                         'mFileSize'       => $this->mFileSize,
 846                         'mSrcName'        => $this->mSrcName,
 847                         'mFileProps'      => $this->mFileProps,
 848                         'version'         => self::SESSION_VERSION,
 849                 );
 850                 return $key;
 851         }
 852
 853         /**
 854          * Remove a temporarily kept file stashed by saveTempUploadedFile().
 855          * @access private
 856          * @return success
 857          */
 858         function unsaveUploadedFile() {
 859                 global $wgOut;
 860                 $repo = RepoGroup::singleton()->getLocalRepo();
 861                 $success = $repo->freeTemp( $this->mTempPath );
 862                 if ( ! $success ) {
 863                         $wgOut->showFileDeleteError( $this->mTempPath );
 864                         return false;
 865                 } else {
 866                         return true;
 867                 }
 868         }
 869
 870         /* -------------------------------------------------------------- */
 871
 872         /**
 873          * @param string $error as HTML
 874          * @access private
 875          */
 876         function uploadError( $error ) {
 877                 global $wgOut;
 878                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 879                 $wgOut->addHTML( '<span class="error">' . $error . '</span>' );
 880         }
 881
 882         /**
 883          * There's something wrong with this file, not enough to reject it
 884          * totally but we require manual intervention to save it for real.
 885          * Stash it away, then present a form asking to confirm or cancel.
 886          *
 887          * @param string $warning as HTML
 888          * @access private
 889          */
 890         function uploadWarning( $warning ) {
 891                 global $wgOut;
 892                 global $wgUseCopyrightUpload;
 893
 894                 $this->mSessionKey = $this->stashSession();
 895                 if( !$this->mSessionKey ) {
 896                         # Couldn't save file; an error has been displayed so let's go.
 897                         return;
 898                 }
 899
 900                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 901                 $wgOut->addHTML( '<ul class="warning">' . $warning . "</ul>\n" );
 902
 903                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
 904
 905                 if ( $wgUseCopyrightUpload ) {
 906                         $copyright = Xml::hidden( 'wpUploadCopyStatus', $this->mCopyrightStatus ) . "\n" .
 907                                         Xml::hidden( 'wpUploadSource', $this->mCopyrightSource ) . "\n";
 908                 } else {
 909                         $copyright = '';
 910                 }
 911
 912                 $wgOut->addHTML(
 913                         Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL( 'action=submit' ),
 914                                  'enctype' => 'multipart/form-data', 'id' => 'uploadwarning' ) ) . "\n" .
 915                         Xml::hidden( 'wpIgnoreWarning', '1' ) . "\n" .
 916                         Xml::hidden( 'wpSessionKey', $this->mSessionKey ) . "\n" .
 917                         Xml::hidden( 'wpUploadDescription', $this->mComment ) . "\n" .
 918                         Xml::hidden( 'wpLicense', $this->mLicense ) . "\n" .
 919                         Xml::hidden( 'wpDestFile', $this->mDesiredDestName ) . "\n" .
 920                         Xml::hidden( 'wpWatchthis', $this->mWatchthis ) . "\n" .
 921                         "{$copyright}<br />" .
 922                         Xml::submitButton( wfMsg( 'ignorewarning' ), array ( 'name' => 'wpUpload', 'id' => 'wpUpload', 'checked' => 'checked' ) ) . ' ' .
 923                         Xml::submitButton( wfMsg( 'reuploaddesc' ), array ( 'name' => 'wpReUpload', 'id' => 'wpReUpload' ) ) .
 924                         Xml::closeElement( 'form' ) . "\n"
 925                 );
 926         }
 927
 928         /**
 929          * Displays the main upload form, optionally with a highlighted
 930          * error message up at the top.
 931          *
 932          * @param string $msg as HTML
 933          * @access private
 934          */
 935         function mainUploadForm( $msg='' ) {
 936                 global $wgOut, $wgUser, $wgLang, $wgMaxUploadSize;
 937                 global $wgUseCopyrightUpload, $wgUseAjax, $wgAjaxUploadDestCheck, $wgAjaxLicensePreview;
 938                 global $wgRequest, $wgAllowCopyUploads;
 939                 global $wgStylePath, $wgStyleVersion;
 940
 941                 $useAjaxDestCheck = $wgUseAjax && $wgAjaxUploadDestCheck;
 942                 $useAjaxLicensePreview = $wgUseAjax && $wgAjaxLicensePreview;
 943
 944                 $adc = wfBoolToStr( $useAjaxDestCheck );
 945                 $alp = wfBoolToStr( $useAjaxLicensePreview );
 946                 $autofill = wfBoolToStr( $this->mDesiredDestName == '' );
 947
 948                 $wgOut->addScript( "<script type=\"text/javascript\">
 949 wgAjaxUploadDestCheck = {$adc};
 950 wgAjaxLicensePreview = {$alp};
 951 wgUploadAutoFill = {$autofill};
 952 </script>" );
 953                 $wgOut->addScriptFile( 'upload.js' );
 954                 $wgOut->addScriptFile( 'edit.js' ); // For <charinsert> support
 955
 956                 if( !wfRunHooks( 'UploadForm:initial', array( &$this ) ) )
 957                 {
 958                         wfDebug( "Hook 'UploadForm:initial' broke output of the upload form" );
 959                         return false;
 960                 }
 961
 962                 if( $this->mDesiredDestName ) {
 963                         $title = Title::makeTitleSafe( NS_FILE, $this->mDesiredDestName );
 964                         // Show a subtitle link to deleted revisions (to sysops et al only)
 965                         if( $title instanceof Title && ( $count = $title->isDeleted() ) > 0 && $wgUser->isAllowed( 'deletedhistory' ) ) {
 966                                 $link = wfMsgExt(
 967                                         $wgUser->isAllowed( 'delete' ) ? 'thisisdeleted' : 'viewdeleted',
 968                                         array( 'parse', 'replaceafter' ),
 969                                         $wgUser->getSkin()->makeKnownLinkObj(
 970                                                 SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedText() ),
 971                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $count )
 972                                         )
 973                                 );
 974                                 $wgOut->addHTML( "<div id=\"contentSub2\">{$link}</div>" );
 975                         }
 976
 977                         // Show the relevant lines from deletion log (for still deleted files only)
 978                         if( $title instanceof Title && $title->isDeleted() > 0 && !$title->exists() ) {
 979                                 $this->showDeletionLog( $wgOut, $title->getPrefixedText() );
 980                         }
 981                 }
 982
 983                 $cols = intval($wgUser->getOption( 'cols' ));
 984
 985                 if( $wgUser->getOption( 'editwidth' ) ) {
 986                         $width = " style=\"width:100%\"";
 987                 } else {
 988                         $width = '';
 989                 }
 990
 991                 if ( '' != $msg ) {
 992                         $sub = wfMsgHtml( 'uploaderror' );
 993                         $wgOut->addHTML( "<h2>{$sub}</h2>\n" .
 994                           "<span class='error'>{$msg}</span>\n" );
 995                 }
 996                 $wgOut->addHTML( '<div id="uploadtext">' );
 997                 $wgOut->addWikiMsg( 'uploadtext', $this->mDesiredDestName );
 998                 $wgOut->addHTML( "</div>\n" );
 999
1000                 # Print a list of allowed file extensions, if so configured.  We ignore
1001                 # MIME type here, it's incomprehensible to most people and too long.
1002                 global $wgCheckFileExtensions, $wgStrictFileExtensions,
1003                 $wgFileExtensions, $wgFileBlacklist;
1004
1005                 $allowedExtensions = '';
1006                 if( $wgCheckFileExtensions ) {
1007                         if( $wgStrictFileExtensions ) {
1008                                 # Everything not permitted is banned
1009                                 $extensionsList =
1010                                         '<div id="mw-upload-permitted">' .
1011                                         wfMsgWikiHtml( 'upload-permitted', $wgLang->commaList( $wgFileExtensions ) ) .
1012                                         "</div>\n";
1013                         } else {
1014                                 # We have to list both preferred and prohibited
1015                                 $extensionsList =
1016                                         '<div id="mw-upload-preferred">' .
1017                                         wfMsgWikiHtml( 'upload-preferred', $wgLang->commaList( $wgFileExtensions ) ) .
1018                                         "</div>\n" .
1019                                         '<div id="mw-upload-prohibited">' .
1020                                         wfMsgWikiHtml( 'upload-prohibited', $wgLang->commaList( $wgFileBlacklist ) ) .
1021                                         "</div>\n";
1022                         }
1023                 } else {
1024                         # Everything is permitted.
1025                         $extensionsList = '';
1026                 }
1027
1028                 # Get the maximum file size from php.ini as $wgMaxUploadSize works for uploads from URL via CURL only
1029                 # See http://www.php.net/manual/en/ini.core.php#ini.upload-max-filesize for possible values of upload_max_filesize
1030                 $val = trim( ini_get( 'upload_max_filesize' ) );
1031                 $last = strtoupper( ( substr( $val, -1 ) ) );
1032                 switch( $last ) {
1033                         case 'G':
1034                                 $val2 = substr( $val, 0, -1 ) * 1024 * 1024 * 1024;
1035                                 break;
1036                         case 'M':
1037                                 $val2 = substr( $val, 0, -1 ) * 1024 * 1024;
1038                                 break;
1039                         case 'K':
1040                                 $val2 = substr( $val, 0, -1 ) * 1024;
1041                                 break;
1042                         default:
1043                                 $val2 = $val;
1044                 }
1045                 $val2 = $wgAllowCopyUploads ? min( $wgMaxUploadSize, $val2 ) : $val2;
1046                 $maxUploadSize = '<div id="mw-upload-maxfilesize">' .
1047                         wfMsgExt( 'upload-maxfilesize', array( 'parseinline', 'escapenoentities' ),
1048                                 $wgLang->formatSize( $val2 ) ) .
1049                                 "</div>\n";
1050
1051                 $sourcefilename = wfMsgExt( 'sourcefilename', array( 'parseinline', 'escapenoentities' ) );
1052         $destfilename = wfMsgExt( 'destfilename', array( 'parseinline', 'escapenoentities' ) );
1053
1054                 $summary = wfMsgExt( 'fileuploadsummary', 'parseinline' );
1055
1056                 $licenses = new Licenses();
1057                 $license = wfMsgExt( 'license', array( 'parseinline' ) );
1058                 $nolicense = wfMsgHtml( 'nolicense' );
1059                 $licenseshtml = $licenses->getHtml();
1060
1061                 $ulb = wfMsgHtml( 'uploadbtn' );
1062
1063
1064                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
1065
1066                 $encDestName = htmlspecialchars( $this->mDesiredDestName );
1067
1068                 $watchChecked = $this->watchCheck()
1069                         ? 'checked="checked"'
1070                         : '';
1071                 $warningChecked = $this->mIgnoreWarning ? 'checked' : '';
1072
1073                 // Prepare form for upload or upload/copy
1074                 if( $wgAllowCopyUploads && $wgUser->isAllowed( 'upload_by_url' ) ) {
1075                         $filename_form =
1076                                 "<input type='radio' id='wpSourceTypeFile' name='wpSourceType' value='file' " .
1077                                    "onchange='toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\")' checked='checked' />" .
1078                                  "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1079                                    "onfocus='" .
1080                                      "toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\");" .
1081                                      "toggle_element_check(\"wpSourceTypeFile\",\"wpSourceTypeURL\")' " .
1082                                      "onchange='fillDestFilename(\"wpUploadFile\")' size='60' />" .
1083                                 wfMsgHTML( 'upload_source_file' ) . "<br/>" .
1084                                 "<input type='radio' id='wpSourceTypeURL' name='wpSourceType' value='web' " .
1085                                   "onchange='toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\")' />" .
1086                                 "<input tabindex='1' type='text' name='wpUploadFileURL' id='wpUploadFileURL' " .
1087                                   "onfocus='" .
1088                                     "toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\");" .
1089                                     "toggle_element_check(\"wpSourceTypeURL\",\"wpSourceTypeFile\")' " .
1090                                     "onchange='fillDestFilename(\"wpUploadFileURL\")' size='60' disabled='disabled' />" .
1091                                 wfMsgHtml( 'upload_source_url' ) ;
1092                 } else {
1093                         $filename_form =
1094                                 "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1095                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") .
1096                                 "size='60' />" .
1097                                 "<input type='hidden' name='wpSourceType' value='file' />" ;
1098                 }
1099                 if ( $useAjaxDestCheck ) {
1100                         $warningRow = "<tr><td colspan='2' id='wpDestFile-warning'>&nbsp;</td></tr>";
1101                         $destOnkeyup = 'onkeyup="wgUploadWarningObj.keypress();"';
1102                 } else {
1103                         $warningRow = '';
1104                         $destOnkeyup = '';
1105                 }
1106
1107                 $encComment = htmlspecialchars( $this->mComment );
1108
1109                 $wgOut->addHTML(
1110                          Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL(),
1111                                  'enctype' => 'multipart/form-data', 'id' => 'mw-upload-form' ) ) .
1112                          Xml::openElement( 'fieldset' ) .
1113                          Xml::element( 'legend', null, wfMsg( 'upload' ) ) .
1114                          Xml::openElement( 'table', array( 'border' => '0', 'id' => 'mw-upload-table' ) ) .
1115                          "<tr>
1116                                 {$this->uploadFormTextTop}
1117                                 <td class='mw-label'>
1118                                         <label for='wpUploadFile'>{$sourcefilename}</label>
1119                                 </td>
1120                                 <td class='mw-input'>
1121                                         {$filename_form}
1122                                 </td>
1123                         </tr>
1124                         <tr>
1125                                 <td></td>
1126                                 <td>
1127                                         {$maxUploadSize}
1128                                         {$extensionsList}
1129                                 </td>
1130                         </tr>
1131                         <tr>
1132                                 <td class='mw-label'>
1133                                         <label for='wpDestFile'>{$destfilename}</label>
1134                                 </td>
1135                                 <td class='mw-input'>
1136                                         <input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='60'
1137                                                 value=\"{$encDestName}\" onchange='toggleFilenameFiller()' $destOnkeyup />
1138                                 </td>
1139                         </tr>
1140                         <tr>
1141                                 <td class='mw-label'>
1142                                         <label for='wpUploadDescription'>{$summary}</label>
1143                                 </td>
1144                                 <td class='mw-input'>
1145                                         <textarea tabindex='3' name='wpUploadDescription' id='wpUploadDescription' rows='6'
1146                                                 cols='{$cols}'{$width}>$encComment</textarea>
1147                                         {$this->uploadFormTextAfterSummary}
1148                                 </td>
1149                         </tr>
1150                         <tr>"
1151                 );
1152
1153                 if ( $licenseshtml != '' ) {
1154                         global $wgStylePath;
1155                         $wgOut->addHTML( "
1156                                         <td class='mw-label'>
1157                                                 <label for='wpLicense'>$license</label>
1158                                         </td>
1159                                         <td class='mw-input'>
1160                                                 <select name='wpLicense' id='wpLicense' tabindex='4'
1161                                                         onchange='licenseSelectorCheck()'>
1162                                                         <option value=''>$nolicense</option>
1163                                                         $licenseshtml
1164                                                 </select>
1165                                         </td>
1166                                 </tr>
1167                                 <tr>"
1168                         );
1169                         if( $useAjaxLicensePreview ) {
1170                                 $wgOut->addHTML( "
1171                                                 <td></td>
1172                                                 <td id=\"mw-license-preview\"></td>
1173                                         </tr>
1174                                         <tr>"
1175                                 );
1176                         }
1177                 }
1178
1179                 if ( $wgUseCopyrightUpload ) {
1180                         $filestatus = wfMsgExt( 'filestatus', 'escapenoentities' );
1181                         $copystatus =  htmlspecialchars( $this->mCopyrightStatus );
1182                         $filesource = wfMsgExt( 'filesource', 'escapenoentities' );
1183                         $uploadsource = htmlspecialchars( $this->mCopyrightSource );
1184
1185                         $wgOut->addHTML( "
1186                                         <td class='mw-label' style='white-space: nowrap;'>
1187                                                 <label for='wpUploadCopyStatus'>$filestatus</label></td>
1188                                         <td class='mw-input'>
1189                                                 <input tabindex='5' type='text' name='wpUploadCopyStatus' id='wpUploadCopyStatus'
1190                                                         value=\"$copystatus\" size='60' />
1191                                         </td>
1192                                 </tr>
1193                                 <tr>
1194                                         <td class='mw-label'>
1195                                                 <label for='wpUploadCopyStatus'>$filesource</label>
1196                                         </td>
1197                                         <td class='mw-input'>
1198                                                 <input tabindex='6' type='text' name='wpUploadSource' id='wpUploadCopyStatus'
1199                                                         value=\"$uploadsource\" size='60' />
1200                                         </td>
1201                                 </tr>
1202                                 <tr>"
1203                         );
1204                 }
1205
1206                 $wgOut->addHTML( "
1207                                 <td></td>
1208                                 <td>
1209                                         <input tabindex='7' type='checkbox' name='wpWatchthis' id='wpWatchthis' $watchChecked value='true' />
1210                                         <label for='wpWatchthis'>" . wfMsgHtml( 'watchthisupload' ) . "</label>
1211                                         <input tabindex='8' type='checkbox' name='wpIgnoreWarning' id='wpIgnoreWarning' value='true' $warningChecked/>
1212                                         <label for='wpIgnoreWarning'>" . wfMsgHtml( 'ignorewarnings' ) . "</label>
1213                                 </td>
1214                         </tr>
1215                         $warningRow
1216                         <tr>
1217                                 <td></td>
1218                                         <td class='mw-input'>
1219                                                 <input tabindex='9' type='submit' name='wpUpload' value=\"{$ulb}\"" . $wgUser->getSkin()->tooltipAndAccesskey( 'upload' ) . " />
1220                                         </td>
1221                         </tr>
1222                         <tr>
1223                                 <td></td>
1224                                 <td class='mw-input'>"
1225                 );
1226                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1227                 $wgOut->addHTML( "
1228                                 </td>
1229                         </tr>" .
1230                         Xml::closeElement( 'table' ) .
1231                         Xml::hidden( 'wpDestFileWarningAck', '', array( 'id' => 'wpDestFileWarningAck' ) ) .
1232                         Xml::closeElement( 'fieldset' ) .
1233                         Xml::closeElement( 'form' )
1234                 );
1235                 $uploadfooter = wfMsgNoTrans( 'uploadfooter' );
1236                 if( $uploadfooter != '-' && !wfEmptyMsg( 'uploadfooter', $uploadfooter ) ){
1237                         $wgOut->addWikiText( '<div id="mw-upload-footer-message">' . $uploadfooter . '</div>' );
1238                 }
1239         }
1240
1241         /* -------------------------------------------------------------- */
1242
1243         /**
1244          * See if we should check the 'watch this page' checkbox on the form
1245          * based on the user's preferences and whether we're being asked
1246          * to create a new file or update an existing one.
1247          *
1248          * In the case where 'watch edits' is off but 'watch creations' is on,
1249          * we'll leave the box unchecked.
1250          *
1251          * Note that the page target can be changed *on the form*, so our check
1252          * state can get out of sync.
1253          */
1254         function watchCheck() {
1255                 global $wgUser;
1256                 if( $wgUser->getOption( 'watchdefault' ) ) {
1257                         // Watch all edits!
1258                         return true;
1259                 }
1260
1261                 $local = wfLocalFile( $this->mDesiredDestName );
1262                 if( $local && $local->exists() ) {
1263                         // We're uploading a new version of an existing file.
1264                         // No creation, so don't watch it if we're not already.
1265                         return $local->getTitle()->userIsWatching();
1266                 } else {
1267                         // New page should get watched if that's our option.
1268                         return $wgUser->getOption( 'watchcreations' );
1269                 }
1270         }
1271
1272         /**
1273          * Split a file into a base name and all dot-delimited 'extensions'
1274          * on the end. Some web server configurations will fall back to
1275          * earlier pseudo-'extensions' to determine type and execute
1276          * scripts, so the blacklist needs to check them all.
1277          *
1278          * @return array
1279          */
1280         public function splitExtensions( $filename ) {
1281                 $bits = explode( '.', $filename );
1282                 $basename = array_shift( $bits );
1283                 return array( $basename, $bits );
1284         }
1285
1286         /**
1287          * Perform case-insensitive match against a list of file extensions.
1288          * Returns true if the extension is in the list.
1289          *
1290          * @param string $ext
1291          * @param array $list
1292          * @return bool
1293          */
1294         function checkFileExtension( $ext, $list ) {
1295                 return in_array( strtolower( $ext ), $list );
1296         }
1297
1298         /**
1299          * Perform case-insensitive match against a list of file extensions.
1300          * Returns true if any of the extensions are in the list.
1301          *
1302          * @param array $ext
1303          * @param array $list
1304          * @return bool
1305          */
1306         public function checkFileExtensionList( $ext, $list ) {
1307                 foreach( $ext as $e ) {
1308                         if( in_array( strtolower( $e ), $list ) ) {
1309                                 return true;
1310                         }
1311                 }
1312                 return false;
1313         }
1314
1315         /**
1316          * Verifies that it's ok to include the uploaded file
1317          *
1318          * @param string $tmpfile the full path of the temporary file to verify
1319          * @param string $extension The filename extension that the file is to be served with
1320          * @return mixed true of the file is verified, a WikiError object otherwise.
1321          */
1322         function verify( $tmpfile, $extension ) {
1323                 #magically determine mime type
1324                 $magic = MimeMagic::singleton();
1325                 $mime = $magic->guessMimeType($tmpfile,false);
1326
1327                 #check mime type, if desired
1328                 global $wgVerifyMimeType;
1329                 if ($wgVerifyMimeType) {
1330
1331                   wfDebug ( "\n\nmime: <$mime> extension: <$extension>\n\n");
1332                         #check mime type against file extension
1333                         if( !self::verifyExtension( $mime, $extension ) ) {
1334                                 return new WikiErrorMsg( 'uploadcorrupt' );
1335                         }
1336
1337                         #check mime type blacklist
1338                         global $wgMimeTypeBlacklist;
1339                         if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist)
1340                                 && $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
1341                                 return new WikiErrorMsg( 'filetype-badmime', htmlspecialchars( $mime ) );
1342                         }
1343                 }
1344
1345                 #check for htmlish code and javascript
1346                 if( $this->detectScript ( $tmpfile, $mime, $extension ) ) {
1347                         return new WikiErrorMsg( 'uploadscripted' );
1348                 }
1349                 if( $extension == 'svg' || $mime == 'image/svg+xml' ) {
1350                         if( $this->detectScriptInSvg( $tmpfile ) ) {
1351                                 return new WikiErrorMsg( 'uploadscripted' );
1352                         }
1353                 }
1354
1355                 /**
1356                 * Scan the uploaded file for viruses
1357                 */
1358                 $virus= $this->detectVirus($tmpfile);
1359                 if ( $virus ) {
1360                         return new WikiErrorMsg( 'uploadvirus', htmlspecialchars($virus) );
1361                 }
1362
1363                 wfDebug( __METHOD__.": all clear; passing.\n" );
1364                 return true;
1365         }
1366
1367         /**
1368          * Checks if the mime type of the uploaded file matches the file extension.
1369          *
1370          * @param string $mime the mime type of the uploaded file
1371          * @param string $extension The filename extension that the file is to be served with
1372          * @return bool
1373          */
1374         static function verifyExtension( $mime, $extension ) {
1375                 $magic = MimeMagic::singleton();
1376
1377                 if ( ! $mime || $mime == 'unknown' || $mime == 'unknown/unknown' )
1378                         if ( ! $magic->isRecognizableExtension( $extension ) ) {
1379                                 wfDebug( __METHOD__.": passing file with unknown detected mime type; " .
1380                                         "unrecognized extension '$extension', can't verify\n" );
1381                                 return true;
1382                         } else {
1383                                 wfDebug( __METHOD__.": rejecting file with unknown detected mime type; ".
1384                                         "recognized extension '$extension', so probably invalid file\n" );
1385                                 return false;
1386                         }
1387
1388                 $match= $magic->isMatchingExtension($extension,$mime);
1389
1390                 if ($match===NULL) {
1391                         wfDebug( __METHOD__.": no file extension known for mime type $mime, passing file\n" );
1392                         return true;
1393                 } elseif ($match===true) {
1394                         wfDebug( __METHOD__.": mime type $mime matches extension $extension, passing file\n" );
1395
1396                         #TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
1397                         return true;
1398
1399                 } else {
1400                         wfDebug( __METHOD__.": mime type $mime mismatches file extension $extension, rejecting file\n" );
1401                         return false;
1402                 }
1403         }
1404
1405         /**
1406          * Heuristic for detecting files that *could* contain JavaScript instructions or
1407          * things that may look like HTML to a browser and are thus
1408          * potentially harmful. The present implementation will produce false positives in some situations.
1409          *
1410          * @param string $file Pathname to the temporary upload file
1411          * @param string $mime The mime type of the file
1412          * @param string $extension The extension of the file
1413          * @return bool true if the file contains something looking like embedded scripts
1414          */
1415         function detectScript($file, $mime, $extension) {
1416                 global $wgAllowTitlesInSVG;
1417
1418                 #ugly hack: for text files, always look at the entire file.
1419                 #For binarie field, just check the first K.
1420
1421                 if (strpos($mime,'text/')===0) $chunk = file_get_contents( $file );
1422                 else {
1423                         $fp = fopen( $file, 'rb' );
1424                         $chunk = fread( $fp, 1024 );
1425                         fclose( $fp );
1426                 }
1427
1428                 $chunk= strtolower( $chunk );
1429
1430                 if (!$chunk) return false;
1431
1432                 #decode from UTF-16 if needed (could be used for obfuscation).
1433                 if (substr($chunk,0,2)=="\xfe\xff") $enc= "UTF-16BE";
1434                 elseif (substr($chunk,0,2)=="\xff\xfe") $enc= "UTF-16LE";
1435                 else $enc= NULL;
1436
1437                 if ($enc) $chunk= iconv($enc,"ASCII//IGNORE",$chunk);
1438
1439                 $chunk= trim($chunk);
1440
1441                 #FIXME: convert from UTF-16 if necessarry!
1442
1443                 wfDebug("SpecialUpload::detectScript: checking for embedded scripts and HTML stuff\n");
1444
1445                 #check for HTML doctype
1446                 if (eregi("<!DOCTYPE *X?HTML",$chunk)) return true;
1447
1448                 /**
1449                 * Internet Explorer for Windows performs some really stupid file type
1450                 * autodetection which can cause it to interpret valid image files as HTML
1451                 * and potentially execute JavaScript, creating a cross-site scripting
1452                 * attack vectors.
1453                 *
1454                 * Apple's Safari browser also performs some unsafe file type autodetection
1455                 * which can cause legitimate files to be interpreted as HTML if the
1456                 * web server is not correctly configured to send the right content-type
1457                 * (or if you're really uploading plain text and octet streams!)
1458                 *
1459                 * Returns true if IE is likely to mistake the given file for HTML.
1460                 * Also returns true if Safari would mistake the given file for HTML
1461                 * when served with a generic content-type.
1462                 */
1463
1464                 $tags = array(
1465                         '<a href',
1466                         '<body',
1467                         '<head',
1468                         '<html',   #also in safari
1469                         '<img',
1470                         '<pre',
1471                         '<script', #also in safari
1472                         '<table'
1473                         );
1474                 if( ! $wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
1475                         $tags[] = '<title';
1476                 }
1477
1478                 foreach( $tags as $tag ) {
1479                         if( false !== strpos( $chunk, $tag ) ) {
1480                                 return true;
1481                         }
1482                 }
1483
1484                 /*
1485                 * look for javascript
1486                 */
1487
1488                 #resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1489                 $chunk = Sanitizer::decodeCharReferences( $chunk );
1490
1491                 #look for script-types
1492                 if (preg_match('!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim',$chunk)) return true;
1493
1494                 #look for html-style script-urls
1495                 if (preg_match('!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1496
1497                 #look for css-style script-urls
1498                 if (preg_match('!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1499
1500                 wfDebug("SpecialUpload::detectScript: no scripts found\n");
1501                 return false;
1502         }
1503
1504         function detectScriptInSvg( $filename ) {
1505                 $check = new XmlTypeCheck( $filename, array( $this, 'checkSvgScriptCallback' ) );
1506                 return $check->filterMatch;
1507         }
1508
1509         /**
1510          * @todo Replace this with a whitelist filter!
1511          */
1512         function checkSvgScriptCallback( $element, $attribs ) {
1513                 $stripped = $this->stripXmlNamespace( $element );
1514
1515                 if( $stripped == 'script' ) {
1516                         wfDebug( __METHOD__ . ": Found script element '$element' in uploaded file.\n" );
1517                         return true;
1518                 }
1519
1520                 foreach( $attribs as $attrib => $value ) {
1521                         $stripped = $this->stripXmlNamespace( $attrib );
1522                         if( substr( $stripped, 0, 2 ) == 'on' ) {
1523                                 wfDebug( __METHOD__ . ": Found script attribute '$attrib'='value' in uploaded file.\n" );
1524                                 return true;
1525                         }
1526                         if( $stripped == 'href' && strpos( strtolower( $value ), 'javascript:' ) !== false ) {
1527                                 wfDebug( __METHOD__ . ": Found script href attribute '$attrib'='$value' in uploaded file.\n" );
1528                                 return true;
1529                         }
1530                 }
1531         }
1532
1533         private function stripXmlNamespace( $name ) {
1534                 // 'http://www.w3.org/2000/svg:script' -> 'script'
1535                 $parts = explode( ':', strtolower( $name ) );
1536                 return array_pop( $parts );
1537         }
1538
1539         /**
1540          * Generic wrapper function for a virus scanner program.
1541          * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
1542          * $wgAntivirusRequired may be used to deny upload if the scan fails.
1543          *
1544          * @param string $file Pathname to the temporary upload file
1545          * @return mixed false if not virus is found, NULL if the scan fails or is disabled,
1546          *         or a string containing feedback from the virus scanner if a virus was found.
1547          *         If textual feedback is missing but a virus was found, this function returns true.
1548          */
1549         function detectVirus($file) {
1550                 global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
1551
1552                 if ( !$wgAntivirus ) {
1553                         wfDebug( __METHOD__.": virus scanner disabled\n");
1554                         return NULL;
1555                 }
1556
1557                 if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1558                         wfDebug( __METHOD__.": unknown virus scanner: $wgAntivirus\n" );
1559                         $wgOut->wrapWikiMsg( '<div class="error">$1</div>', array( 'virus-badscanner', $wgAntivirus ) );
1560                         return wfMsg('virus-unknownscanner') . " $wgAntivirus";
1561                 }
1562
1563                 # look up scanner configuration
1564                 $command = $wgAntivirusSetup[$wgAntivirus]["command"];
1565                 $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]["codemap"];
1566                 $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]["messagepattern"] ) ?
1567                         $wgAntivirusSetup[$wgAntivirus]["messagepattern"] : null;
1568
1569                 if ( strpos( $command,"%f" ) === false ) {
1570                         # simple pattern: append file to scan
1571                         $command .= " " . wfEscapeShellArg( $file );
1572                 } else {
1573                         # complex pattern: replace "%f" with file to scan
1574                         $command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
1575                 }
1576
1577                 wfDebug( __METHOD__.": running virus scan: $command \n" );
1578
1579                 # execute virus scanner
1580                 $exitCode = false;
1581
1582                 #NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1583                 #      that does not seem to be worth the pain.
1584                 #      Ask me (Duesentrieb) about it if it's ever needed.
1585                 $output = array();
1586                 if ( wfIsWindows() ) {
1587                         exec( "$command", $output, $exitCode );
1588                 } else {
1589                         exec( "$command 2>&1", $output, $exitCode );
1590                 }
1591
1592                 # map exit code to AV_xxx constants.
1593                 $mappedCode = $exitCode;
1594                 if ( $exitCodeMap ) {
1595                         if ( isset( $exitCodeMap[$exitCode] ) ) {
1596                                 $mappedCode = $exitCodeMap[$exitCode];
1597                         } elseif ( isset( $exitCodeMap["*"] ) ) {
1598                                 $mappedCode = $exitCodeMap["*"];
1599                         }
1600                 }
1601
1602                 if ( $mappedCode === AV_SCAN_FAILED ) {
1603                         # scan failed (code was mapped to false by $exitCodeMap)
1604                         wfDebug( __METHOD__.": failed to scan $file (code $exitCode).\n" );
1605
1606                         if ( $wgAntivirusRequired ) {
1607                                 return wfMsg('virus-scanfailed', array( $exitCode ) );
1608                         } else {
1609                                 return NULL;
1610                         }
1611                 } else if ( $mappedCode === AV_SCAN_ABORTED ) {
1612                         # scan failed because filetype is unknown (probably imune)
1613                         wfDebug( __METHOD__.": unsupported file type $file (code $exitCode).\n" );
1614                         return NULL;
1615                 } else if ( $mappedCode === AV_NO_VIRUS ) {
1616                         # no virus found
1617                         wfDebug( __METHOD__.": file passed virus scan.\n" );
1618                         return false;
1619                 } else {
1620                         $output = join( "\n", $output );
1621                         $output = trim( $output );
1622
1623                         if ( !$output ) {
1624                                 $output = true; #if there's no output, return true
1625                         } elseif ( $msgPattern ) {
1626                                 $groups = array();
1627                                 if ( preg_match( $msgPattern, $output, $groups ) ) {
1628                                         if ( $groups[1] ) {
1629                                                 $output = $groups[1];
1630                                         }
1631                                 }
1632                         }
1633
1634                         wfDebug( __METHOD__.": FOUND VIRUS! scanner feedback: $output" );
1635                         return $output;
1636                 }
1637         }
1638
1639         /**
1640          * Check if the temporary file is MacBinary-encoded, as some uploads
1641          * from Internet Explorer on Mac OS Classic and Mac OS X will be.
1642          * If so, the data fork will be extracted to a second temporary file,
1643          * which will then be checked for validity and either kept or discarded.
1644          *
1645          * @access private
1646          */
1647         function checkMacBinary() {
1648                 $macbin = new MacBinary( $this->mTempPath );
1649                 if( $macbin->isValid() ) {
1650                         $dataFile = tempnam( wfTempDir(), "WikiMacBinary" );
1651                         $dataHandle = fopen( $dataFile, 'wb' );
1652
1653                         wfDebug( "SpecialUpload::checkMacBinary: Extracting MacBinary data fork to $dataFile\n" );
1654                         $macbin->extractData( $dataHandle );
1655
1656                         $this->mTempPath = $dataFile;
1657                         $this->mFileSize = $macbin->dataForkLength();
1658
1659                         // We'll have to manually remove the new file if it's not kept.
1660                         $this->mRemoveTempFile = true;
1661                 }
1662                 $macbin->close();
1663         }
1664
1665         /**
1666          * If we've modified the upload file we need to manually remove it
1667          * on exit to clean up.
1668          * @access private
1669          */
1670         function cleanupTempFile() {
1671                 if ( $this->mRemoveTempFile && file_exists( $this->mTempPath ) ) {
1672                         wfDebug( "SpecialUpload::cleanupTempFile: Removing temporary file {$this->mTempPath}\n" );
1673                         unlink( $this->mTempPath );
1674                 }
1675         }
1676
1677         /**
1678          * Check if there's an overwrite conflict and, if so, if restrictions
1679          * forbid this user from performing the upload.
1680          *
1681          * @return mixed true on success, WikiError on failure
1682          * @access private
1683          */
1684         function checkOverwrite( $name ) {
1685                 $img = wfFindFile( $name );
1686
1687                 $error = '';
1688                 if( $img ) {
1689                         global $wgUser, $wgOut;
1690                         if( $img->isLocal() ) {
1691                                 if( !self::userCanReUpload( $wgUser, $img->name ) ) {
1692                                         $error = 'fileexists-forbidden';
1693                                 }
1694                         } else {
1695                                 if( !$wgUser->isAllowed( 'reupload' ) ||
1696                                     !$wgUser->isAllowed( 'reupload-shared' ) ) {
1697                                         $error = "fileexists-shared-forbidden";
1698                                 }
1699                         }
1700                 }
1701
1702                 if( $error ) {
1703                         $errorText = wfMsg( $error, wfEscapeWikiText( $img->getName() ) );
1704                         return $errorText;
1705                 }
1706
1707                 // Rockin', go ahead and upload
1708                 return true;
1709         }
1710
1711          /**
1712          * Check if a user is the last uploader
1713          *
1714          * @param User $user
1715          * @param string $img, image name
1716          * @return bool
1717          */
1718         public static function userCanReUpload( User $user, $img ) {
1719                 if( $user->isAllowed( 'reupload' ) )
1720                         return true; // non-conditional
1721                 if( !$user->isAllowed( 'reupload-own' ) )
1722                         return false;
1723
1724                 $dbr = wfGetDB( DB_SLAVE );
1725                 $row = $dbr->selectRow('image',
1726                 /* SELECT */ 'img_user',
1727                 /* WHERE */ array( 'img_name' => $img )
1728                 );
1729                 if ( !$row )
1730                         return false;
1731
1732                 return $user->getId() == $row->img_user;
1733         }
1734
1735         /**
1736          * Display an error with a wikitext description
1737          */
1738         function showError( $description ) {
1739                 global $wgOut;
1740                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
1741                 $wgOut->setRobotPolicy( "noindex,nofollow" );
1742                 $wgOut->setArticleRelated( false );
1743                 $wgOut->enableClientCache( false );
1744                 $wgOut->addWikiText( $description );
1745         }
1746
1747         /**
1748          * Get the initial image page text based on a comment and optional file status information
1749          */
1750         static function getInitialPageText( $comment, $license, $copyStatus, $source ) {
1751                 global $wgUseCopyrightUpload;
1752                 if ( $wgUseCopyrightUpload ) {
1753                         if ( $license != '' ) {
1754                                 $licensetxt = '== ' . wfMsgForContent( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1755                         }
1756                         $pageText = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n" .
1757                           '== ' . wfMsgForContent ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
1758                           "$licensetxt" .
1759                           '== ' . wfMsgForContent ( 'filesource' ) . " ==\n" . $source ;
1760                 } else {
1761                         if ( $license != '' ) {
1762                                 $filedesc = $comment == '' ? '' : '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n";
1763                                  $pageText = $filedesc .
1764                                          '== ' . wfMsgForContent ( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1765                         } else {
1766                                 $pageText = $comment;
1767                         }
1768                 }
1769                 return $pageText;
1770         }
1771
1772         /**
1773          * If there are rows in the deletion log for this file, show them,
1774          * along with a nice little note for the user
1775          *
1776          * @param OutputPage $out
1777          * @param string filename
1778          */
1779         private function showDeletionLog( $out, $filename ) {
1780                 global $wgUser;
1781                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
1782                 $pager = new LogPager( $loglist, 'delete', false, $filename );
1783                 if( $pager->getNumRows() > 0 ) {
1784                         $out->addHTML( '<div class="mw-warning-with-logexcerpt">' );
1785                         $out->addWikiMsg( 'upload-wasdeleted' );
1786                         $out->addHTML(
1787                                 $loglist->beginLogEventsList() .
1788                                 $pager->getBody() .
1789                                 $loglist->endLogEventsList()
1790                         );
1791                         $out->addHTML( '</div>' );
1792                 }
1793         }
1794 }