includes/SpecialUpload.php

   1 <?php
   2 /**
   3  *
   4  * @addtogroup 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  * @addtogroup 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                         $this->mainUploadForm();
 263                 } else if( 'submit' == $this->mAction || $this->mUploadClicked ) {
 264                         $this->processUpload();
 265                 } else {
 266                         $this->mainUploadForm();
 267                 }
 268
 269                 $this->cleanupTempFile();
 270         }
 271
 272         /**
 273          * Do the upload
 274          * Checks are made in SpecialUpload::execute()
 275          *
 276          * @access private
 277          */
 278         function processUpload(){
 279                 global $wgUser, $wgOut, $wgFileExtensions;
 280                 $details = null;
 281                 $value = null;
 282                 $value = $this->internalProcessUpload( $details );
 283
 284                 switch($value) {
 285                         case self::SUCCESS:
 286                                 $wgOut->redirect( $this->mLocalFile->getTitle()->getFullURL() );
 287                                 break;
 288
 289                         case self::BEFORE_PROCESSING:
 290                                 break;
 291
 292                         case self::LARGE_FILE_SERVER:
 293                                 $this->mainUploadForm( wfMsgHtml( 'largefileserver' ) );
 294                                 break;
 295
 296                         case self::EMPTY_FILE:
 297                                 $this->mainUploadForm( wfMsgHtml( 'emptyfile' ) );
 298                                 break;
 299
 300                         case self::MIN_LENGHT_PARTNAME:
 301                                 $this->mainUploadForm( wfMsgHtml( 'minlength1' ) );
 302                                 break;
 303
 304                         case self::ILLEGAL_FILENAME:
 305                                 $filtered = $details['filtered'];
 306                                 $this->uploadError( wfMsgWikiHtml( 'illegalfilename', htmlspecialchars( $filtered ) ) );
 307                                 break;
 308
 309                         case self::PROTECTED_PAGE:
 310                                 $this->uploadError( wfMsgWikiHtml( 'protectedpage' ) );
 311                                 break;
 312
 313                         case self::OVERWRITE_EXISTING_FILE:
 314                                 $errorText = $details['overwrite'];
 315                                 $overwrite = new WikiError( $wgOut->parse( $errorText ) );
 316                                 $this->uploadError( $overwrite->toString() );
 317                                 break;
 318
 319                         case self::FILETYPE_MISSING:
 320                                 $this->uploadError( wfMsgExt( 'filetype-missing', array ( 'parseinline' ) ) );
 321                                 break;
 322
 323                         case self::FILETYPE_BADTYPE:
 324                                 $finalExt = $details['finalExt'];
 325                                 $this->uploadError(
 326                                         wfMsgExt( 'filetype-banned-type',
 327                                                 array( 'parseinline' ),
 328                                                 htmlspecialchars( $finalExt ),
 329                                                 implode(
 330                                                         wfMsgExt( 'comma-separator', array( 'escapenoentities' ) ),
 331                                                         $wgFileExtensions
 332                                                 )
 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                 /* Check for curl error */
 380                 if( $this->mCurlError ) {
 381                         return self::BEFORE_PROCESSING;
 382                 }
 383
 384                 /**
 385                  * If there was no filename or a zero size given, give up quick.
 386                  */
 387                 if( trim( $this->mSrcName ) == '' || empty( $this->mFileSize ) ) {
 388                         return self::EMPTY_FILE;
 389                 }
 390
 391                 # Chop off any directories in the given filename
 392                 if( $this->mDesiredDestName ) {
 393                         $basename = $this->mDesiredDestName;
 394                 } else {
 395                         $basename = $this->mSrcName;
 396                 }
 397                 $filtered = wfBaseName( $basename );
 398
 399                 /**
 400                  * We'll want to blacklist against *any* 'extension', and use
 401                  * only the final one for the whitelist.
 402                  */
 403                 list( $partname, $ext ) = $this->splitExtensions( $filtered );
 404
 405                 if( count( $ext ) ) {
 406                         $finalExt = $ext[count( $ext ) - 1];
 407                 } else {
 408                         $finalExt = '';
 409                 }
 410
 411                 # If there was more than one "extension", reassemble the base
 412                 # filename to prevent bogus complaints about length
 413                 if( count( $ext ) > 1 ) {
 414                         for( $i = 0; $i < count( $ext ) - 1; $i++ )
 415                                 $partname .= '.' . $ext[$i];
 416                 }
 417
 418                 if( strlen( $partname ) < 1 ) {
 419                         return self::MIN_LENGHT_PARTNAME;
 420                 }
 421
 422                 /**
 423                  * Filter out illegal characters, and try to make a legible name
 424                  * out of it. We'll strip some silently that Title would die on.
 425                  */
 426                 $filtered = preg_replace ( "/[^".Title::legalChars()."]|:/", '-', $filtered );
 427                 $nt = Title::makeTitleSafe( NS_IMAGE, $filtered );
 428                 if( is_null( $nt ) ) {
 429                         $resultDetails = array( 'filtered' => $filtered );
 430                         return self::ILLEGAL_FILENAME;
 431                 }
 432                 $this->mLocalFile = wfLocalFile( $nt );
 433                 $this->mDestName = $this->mLocalFile->getName();
 434
 435                 /**
 436                  * If the image is protected, non-sysop users won't be able
 437                  * to modify it by uploading a new revision.
 438                  */
 439                 if( !$nt->userCan( 'edit' ) || !$nt->userCan( 'create' ) ) {
 440                         return self::PROTECTED_PAGE;
 441                 }
 442
 443                 /**
 444                  * In some cases we may forbid overwriting of existing files.
 445                  */
 446                 $overwrite = $this->checkOverwrite( $this->mDestName );
 447                 if( $overwrite !== true ) {
 448                         $resultDetails = array( 'overwrite' => $overwrite );
 449                         return self::OVERWRITE_EXISTING_FILE;
 450                 }
 451
 452                 /* Don't allow users to override the blacklist (check file extension) */
 453                 global $wgStrictFileExtensions;
 454                 global $wgFileExtensions, $wgFileBlacklist;
 455                 if ($finalExt == '') {
 456                         return self::FILETYPE_MISSING;
 457                 } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) ||
 458                                 ($wgStrictFileExtensions && !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) ) {
 459                         $resultDetails = array( 'finalExt' => $finalExt );
 460                         return self::FILETYPE_BADTYPE;
 461                 }
 462
 463                 /**
 464                  * Look at the contents of the file; if we can recognize the
 465                  * type but it's corrupt or data of the wrong type, we should
 466                  * probably not accept it.
 467                  */
 468                 if( !$this->mStashed ) {
 469                         $this->mFileProps = File::getPropsFromPath( $this->mTempPath, $finalExt );
 470                         $this->checkMacBinary();
 471                         $veri = $this->verify( $this->mTempPath, $finalExt );
 472
 473                         if( $veri !== true ) { //it's a wiki error...
 474                                 $resultDetails = array( 'veri' => $veri );
 475                                 return self::VERIFICATION_ERROR;
 476                         }
 477
 478                         /**
 479                          * Provide an opportunity for extensions to add further checks
 480                          */
 481                         $error = '';
 482                         if( !wfRunHooks( 'UploadVerification',
 483                                         array( $this->mDestName, $this->mTempPath, &$error ) ) ) {
 484                                 $resultDetails = array( 'error' => $error );
 485                                 return self::UPLOAD_VERIFICATION_ERROR;
 486                         }
 487                 }
 488
 489
 490                 /**
 491                  * Check for non-fatal conditions
 492                  */
 493                 if ( ! $this->mIgnoreWarning ) {
 494                         $warning = '';
 495
 496                         global $wgCapitalLinks;
 497                         if( $wgCapitalLinks ) {
 498                                 $filtered = ucfirst( $filtered );
 499                         }
 500                         if( $basename != $filtered ) {
 501                                 $warning .=  '<li>'.wfMsgHtml( 'badfilename', htmlspecialchars( $this->mDestName ) ).'</li>';
 502                         }
 503
 504                         global $wgCheckFileExtensions;
 505                         if ( $wgCheckFileExtensions ) {
 506                                 if ( !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) {
 507                                         $warning .= '<li>' .
 508                                         wfMsgExt( 'filetype-unwanted-type',
 509                                                 array( 'parseinline' ),
 510                                                 htmlspecialchars( $finalExt ),
 511                                                 implode(
 512                                                         wfMsgExt( 'comma-separator', array( 'escapenoentities' ) ),
 513                                                         $wgFileExtensions
 514                                                 )
 515                                         ) . '</li>';
 516                                 }
 517                         }
 518
 519                         global $wgUploadSizeWarning;
 520                         if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) {
 521                                 $skin = $wgUser->getSkin();
 522                                 $wsize = $skin->formatSize( $wgUploadSizeWarning );
 523                                 $asize = $skin->formatSize( $this->mFileSize );
 524                                 $warning .= '<li>' . wfMsgHtml( 'large-file', $wsize, $asize ) . '</li>';
 525                         }
 526                         if ( $this->mFileSize == 0 ) {
 527                                 $warning .= '<li>'.wfMsgHtml( 'emptyfile' ).'</li>';
 528                         }
 529
 530                         if ( !$this->mDestWarningAck ) {
 531                                 $warning .= self::getExistsWarning( $this->mLocalFile );
 532                         }
 533                         if( $warning != '' ) {
 534                                 /**
 535                                  * Stash the file in a temporary location; the user can choose
 536                                  * to let it through and we'll complete the upload then.
 537                                  */
 538                                 $resultDetails = array( 'warning' => $warning );
 539                                 return self::UPLOAD_WARNING;
 540                         }
 541                 }
 542
 543                 /**
 544                  * Try actually saving the thing...
 545                  * It will show an error form on failure.
 546                  */
 547                 $pageText = self::getInitialPageText( $this->mComment, $this->mLicense,
 548                         $this->mCopyrightStatus, $this->mCopyrightSource );
 549
 550                 $status = $this->mLocalFile->upload( $this->mTempPath, $this->mComment, $pageText,
 551                         File::DELETE_SOURCE, $this->mFileProps );
 552                 if ( !$status->isGood() ) {
 553                         $resultDetails = array( 'internal' => $status->getWikiText() );
 554                         return self::INTERNAL_ERROR;
 555                 } else {
 556                         if ( $this->mWatchthis ) {
 557                                 global $wgUser;
 558                                 $wgUser->addWatch( $this->mLocalFile->getTitle() );
 559                         }
 560                         // Success, redirect to description page
 561                         $img = null; // @todo: added to avoid passing a ref to null - should this be defined somewhere?
 562                         wfRunHooks( 'UploadComplete', array( &$this ) );
 563                         return self::SUCCESS;
 564                 }
 565         }
 566
 567         /**
 568          * Do existence checks on a file and produce a warning
 569          * This check is static and can be done pre-upload via AJAX
 570          * Returns an HTML fragment consisting of one or more LI elements if there is a warning
 571          * Returns an empty string if there is no warning
 572          */
 573         static function getExistsWarning( $file ) {
 574                 global $wgUser, $wgContLang;
 575                 // Check for uppercase extension. We allow these filenames but check if an image
 576                 // with lowercase extension exists already
 577                 $warning = '';
 578                 $align = $wgContLang->isRtl() ? 'left' : 'right';
 579
 580                 if( strpos( $file->getName(), '.' ) == false ) {
 581                         $partname = $file->getName();
 582                         $rawExtension = '';
 583                 } else {
 584                         $n = strrpos( $file->getName(), '.' );
 585                         $rawExtension = substr( $file->getName(), $n + 1 );
 586                         $partname = substr( $file->getName(), 0, $n );
 587                 }
 588
 589                 $sk = $wgUser->getSkin();
 590
 591                 if ( $rawExtension != $file->getExtension() ) {
 592                         // We're not using the normalized form of the extension.
 593                         // Normal form is lowercase, using most common of alternate
 594                         // extensions (eg 'jpg' rather than 'JPEG').
 595                         //
 596                         // Check for another file using the normalized form...
 597                         $nt_lc = Title::newFromText( $partname . '.' . $file->getExtension() );
 598                         $file_lc = wfLocalFile( $nt_lc );
 599                 } else {
 600                         $file_lc = false;
 601                 }
 602
 603                 if( $file->exists() ) {
 604                         $dlink = $sk->makeKnownLinkObj( $file->getTitle() );
 605                         if ( $file->allowInlineDisplay() ) {
 606                                 $dlink2 = $sk->makeImageLinkObj( $file->getTitle(), wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 607                                         $file->getName(), $align, array(), false, true );
 608                         } elseif ( !$file->allowInlineDisplay() && $file->isSafeFile() ) {
 609                                 $icon = $file->iconThumb();
 610                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 611                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 612                         } else {
 613                                 $dlink2 = '';
 614                         }
 615
 616                         $warning .= '<li>' . wfMsgExt( 'fileexists', array('parseinline','replaceafter'), $dlink ) . '</li>' . $dlink2;
 617
 618                 } elseif( $file->getTitle()->getArticleID() ) {
 619                         $lnk = $sk->makeKnownLinkObj( $file->getTitle(), '', 'redirect=no' );
 620                         $warning .= '<li>' . wfMsgExt( 'filepageexists', array( 'parseinline', 'replaceafter' ), $lnk ) . '</li>';
 621                 } elseif ( $file_lc && $file_lc->exists() ) {
 622                         # Check if image with lowercase extension exists.
 623                         # It's not forbidden but in 99% it makes no sense to upload the same filename with uppercase extension
 624                         $dlink = $sk->makeKnownLinkObj( $nt_lc );
 625                         if ( $file_lc->allowInlineDisplay() ) {
 626                                 $dlink2 = $sk->makeImageLinkObj( $nt_lc, wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 627                                         $nt_lc->getText(), $align, array(), false, true );
 628                         } elseif ( !$file_lc->allowInlineDisplay() && $file_lc->isSafeFile() ) {
 629                                 $icon = $file_lc->iconThumb();
 630                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 631                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 632                         } else {
 633                                 $dlink2 = '';
 634                         }
 635
 636                         $warning .= '<li>' . wfMsgExt( 'fileexists-extension', 'parsemag', $file->getName(), $dlink ) . '</li>' . $dlink2;
 637
 638                 } elseif ( ( substr( $partname , 3, 3 ) == 'px-' || substr( $partname , 2, 3 ) == 'px-' )
 639                         && ereg( "[0-9]{2}" , substr( $partname , 0, 2) ) )
 640                 {
 641                         # Check for filenames like 50px- or 180px-, these are mostly thumbnails
 642                         $nt_thb = Title::newFromText( substr( $partname , strpos( $partname , '-' ) +1 ) . '.' . $rawExtension );
 643                         $file_thb = wfLocalFile( $nt_thb );
 644                         if ($file_thb->exists() ) {
 645                                 # Check if an image without leading '180px-' (or similiar) exists
 646                                 $dlink = $sk->makeKnownLinkObj( $nt_thb);
 647                                 if ( $file_thb->allowInlineDisplay() ) {
 648                                         $dlink2 = $sk->makeImageLinkObj( $nt_thb,
 649                                                 wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 650                                                 $nt_thb->getText(), $align, array(), false, true );
 651                                 } elseif ( !$file_thb->allowInlineDisplay() && $file_thb->isSafeFile() ) {
 652                                         $icon = $file_thb->iconThumb();
 653                                         $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 654                                                 $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' .
 655                                                 $dlink . '</div>';
 656                                 } else {
 657                                         $dlink2 = '';
 658                                 }
 659
 660                                 $warning .= '<li>' . wfMsgExt( 'fileexists-thumbnail-yes', 'parsemag', $dlink ) .
 661                                         '</li>' . $dlink2;
 662                         } else {
 663                                 # Image w/o '180px-' does not exists, but we do not like these filenames
 664                                 $warning .= '<li>' . wfMsgExt( 'file-thumbnail-no', 'parseinline' ,
 665                                         substr( $partname , 0, strpos( $partname , '-' ) +1 ) ) . '</li>';
 666                         }
 667                 }
 668
 669                 $filenamePrefixBlacklist = self::getFilenamePrefixBlacklist();
 670                 # Do the match
 671                 foreach( $filenamePrefixBlacklist as $prefix ) {
 672                         if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
 673                                 $warning .= '<li>' . wfMsgExt( 'filename-bad-prefix', 'parseinline', $prefix ) . '</li>';
 674                                 break;
 675                         }
 676                 }
 677
 678                 if ( $file->wasDeleted() && !$file->exists() ) {
 679                         # If the file existed before and was deleted, warn the user of this
 680                         # Don't bother doing so if the file exists now, however
 681                         $ltitle = SpecialPage::getTitleFor( 'Log' );
 682                         $llink = $sk->makeKnownLinkObj( $ltitle, wfMsgHtml( 'deletionlog' ),
 683                                 'type=delete&page=' . $file->getTitle()->getPrefixedUrl() );
 684                         $warning .= '<li>' . wfMsgWikiHtml( 'filewasdeleted', $llink ) . '</li>';
 685                 }
 686                 return $warning;
 687         }
 688
 689         /**
 690          * Get a list of warnings
 691          *
 692          * @param string local filename, e.g. 'file exists', 'non-descriptive filename'
 693          * @return array list of warning messages
 694          */
 695         static function ajaxGetExistsWarning( $filename ) {
 696                 $file = wfFindFile( $filename );
 697                 if( !$file ) {
 698                         // Force local file so we have an object to do further checks against
 699                         // if there isn't an exact match...
 700                         $file = wfLocalFile( $filename );
 701                 }
 702                 $s = '&nbsp;';
 703                 if ( $file ) {
 704                         $warning = self::getExistsWarning( $file );
 705                         if ( $warning !== '' ) {
 706                                 $s = "<ul>$warning</ul>";
 707                         }
 708                 }
 709                 return $s;
 710         }
 711
 712         /**
 713          * Render a preview of a given license for the AJAX preview on upload
 714          *
 715          * @param string $license
 716          * @return string
 717          */
 718         public static function ajaxGetLicensePreview( $license ) {
 719                 global $wgParser, $wgUser;
 720                 $text = '{{' . $license . '}}';
 721                 $title = Title::makeTitle( NS_IMAGE, 'Sample.jpg' );
 722                 $options = ParserOptions::newFromUser( $wgUser );
 723
 724                 // Expand subst: first, then live templates...
 725                 $text = $wgParser->preSaveTransform( $text, $title, $wgUser, $options );
 726                 $output = $wgParser->parse( $text, $title, $options );
 727
 728                 return $output->getText();
 729         }
 730
 731         /**
 732          * Get a list of blacklisted filename prefixes from [[MediaWiki:filename-prefix-blacklist]]
 733          *
 734          * @return array list of prefixes
 735          */
 736         public static function getFilenamePrefixBlacklist() {
 737                 $blacklist = array();
 738                 $message = wfMsgForContent( 'filename-prefix-blacklist' );
 739                 if( $message && !( wfEmptyMsg( 'filename-prefix-blacklist', $message ) || $message == '-' ) ) {
 740                         $lines = explode( "\n", $message );
 741                         foreach( $lines as $line ) {
 742                                 // Remove comment lines
 743                                 $comment = substr( trim( $line ), 0, 1 );
 744                                 if ( $comment == '#' || $comment == '' ) {
 745                                         continue;
 746                                 }
 747                                 // Remove additional comments after a prefix
 748                                 $comment = strpos( $line, '#' );
 749                                 if ( $comment > 0 ) {
 750                                         $line = substr( $line, 0, $comment-1 );
 751                                 }
 752                                 $blacklist[] = trim( $line );
 753                         }
 754                 }
 755                 return $blacklist;
 756         }
 757
 758         /**
 759          * Stash a file in a temporary directory for later processing
 760          * after the user has confirmed it.
 761          *
 762          * If the user doesn't explicitly cancel or accept, these files
 763          * can accumulate in the temp directory.
 764          *
 765          * @param string $saveName - the destination filename
 766          * @param string $tempName - the source temporary file to save
 767          * @return string - full path the stashed file, or false on failure
 768          * @access private
 769          */
 770         function saveTempUploadedFile( $saveName, $tempName ) {
 771                 global $wgOut;
 772                 $repo = RepoGroup::singleton()->getLocalRepo();
 773                 $status = $repo->storeTemp( $saveName, $tempName );
 774                 if ( !$status->isGood() ) {
 775                         $this->showError( $status->getWikiText() );
 776                         return false;
 777                 } else {
 778                         return $status->value;
 779                 }
 780         }
 781
 782         /**
 783          * Stash a file in a temporary directory for later processing,
 784          * and save the necessary descriptive info into the session.
 785          * Returns a key value which will be passed through a form
 786          * to pick up the path info on a later invocation.
 787          *
 788          * @return int
 789          * @access private
 790          */
 791         function stashSession() {
 792                 $stash = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath );
 793
 794                 if( !$stash ) {
 795                         # Couldn't save the file.
 796                         return false;
 797                 }
 798
 799                 $key = mt_rand( 0, 0x7fffffff );
 800                 $_SESSION['wsUploadData'][$key] = array(
 801                         'mTempPath'       => $stash,
 802                         'mFileSize'       => $this->mFileSize,
 803                         'mSrcName'        => $this->mSrcName,
 804                         'mFileProps'      => $this->mFileProps,
 805                         'version'         => self::SESSION_VERSION,
 806                 );
 807                 return $key;
 808         }
 809
 810         /**
 811          * Remove a temporarily kept file stashed by saveTempUploadedFile().
 812          * @access private
 813          * @return success
 814          */
 815         function unsaveUploadedFile() {
 816                 global $wgOut;
 817                 $repo = RepoGroup::singleton()->getLocalRepo();
 818                 $success = $repo->freeTemp( $this->mTempPath );
 819                 if ( ! $success ) {
 820                         $wgOut->showFileDeleteError( $this->mTempPath );
 821                         return false;
 822                 } else {
 823                         return true;
 824                 }
 825         }
 826
 827         /* -------------------------------------------------------------- */
 828
 829         /**
 830          * @param string $error as HTML
 831          * @access private
 832          */
 833         function uploadError( $error ) {
 834                 global $wgOut;
 835                 $wgOut->addHTML( "<h2>" . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 836                 $wgOut->addHTML( "<span class='error'>{$error}</span>\n" );
 837         }
 838
 839         /**
 840          * There's something wrong with this file, not enough to reject it
 841          * totally but we require manual intervention to save it for real.
 842          * Stash it away, then present a form asking to confirm or cancel.
 843          *
 844          * @param string $warning as HTML
 845          * @access private
 846          */
 847         function uploadWarning( $warning ) {
 848                 global $wgOut, $wgContLang;
 849                 global $wgUseCopyrightUpload;
 850
 851                 $this->mSessionKey = $this->stashSession();
 852                 if( !$this->mSessionKey ) {
 853                         # Couldn't save file; an error has been displayed so let's go.
 854                         return;
 855                 }
 856
 857                 $wgOut->addHTML( "<h2>" . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 858                 $wgOut->addHTML( "<ul class='warning'>{$warning}</ul><br />\n" );
 859
 860                 $save = wfMsgHtml( 'savefile' );
 861                 $reupload = wfMsgHtml( 'reupload' );
 862                 $iw = wfMsgWikiHtml( 'ignorewarning' );
 863                 $reup = wfMsgWikiHtml( 'reuploaddesc' );
 864                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
 865                 $action = $titleObj->escapeLocalURL( 'action=submit' );
 866                 $align1 = $wgContLang->isRTL() ? 'left' : 'right';
 867                 $align2 = $wgContLang->isRTL() ? 'right' : 'left';
 868
 869                 if ( $wgUseCopyrightUpload )
 870                 {
 871                         $copyright =  "
 872         <input type='hidden' name='wpUploadCopyStatus' value=\"" . htmlspecialchars( $this->mCopyrightStatus ) . "\" />
 873         <input type='hidden' name='wpUploadSource' value=\"" . htmlspecialchars( $this->mCopyrightSource ) . "\" />
 874         ";
 875                 } else {
 876                         $copyright = "";
 877                 }
 878
 879                 $wgOut->addHTML( "
 880         <form id='uploadwarning' method='post' enctype='multipart/form-data' action='$action'>
 881                 <input type='hidden' name='wpIgnoreWarning' value='1' />
 882                 <input type='hidden' name='wpSessionKey' value=\"" . htmlspecialchars( $this->mSessionKey ) . "\" />
 883                 <input type='hidden' name='wpUploadDescription' value=\"" . htmlspecialchars( $this->mComment ) . "\" />
 884                 <input type='hidden' name='wpLicense' value=\"" . htmlspecialchars( $this->mLicense ) . "\" />
 885                 <input type='hidden' name='wpDestFile' value=\"" . htmlspecialchars( $this->mDesiredDestName ) . "\" />
 886                 <input type='hidden' name='wpWatchthis' value=\"" . htmlspecialchars( intval( $this->mWatchthis ) ) . "\" />
 887         {$copyright}
 888         <table border='0'>
 889                 <tr>
 890                         <tr>
 891                                 <td align='$align1'>
 892                                         <input tabindex='2' type='submit' name='wpUpload' value=\"$save\" />
 893                                 </td>
 894                                 <td align='$align2'>$iw</td>
 895                         </tr>
 896                         <tr>
 897                                 <td align='$align1'>
 898                                         <input tabindex='2' type='submit' name='wpReUpload' value=\"{$reupload}\" />
 899                                 </td>
 900                                 <td align='$align2'>$reup</td>
 901                         </tr>
 902                 </tr>
 903         </table></form>\n" );
 904         }
 905
 906         /**
 907          * Displays the main upload form, optionally with a highlighted
 908          * error message up at the top.
 909          *
 910          * @param string $msg as HTML
 911          * @access private
 912          */
 913         function mainUploadForm( $msg='' ) {
 914                 global $wgOut, $wgUser;
 915                 global $wgUseCopyrightUpload, $wgUseAjax, $wgAjaxUploadDestCheck, $wgAjaxLicensePreview;
 916                 global $wgRequest, $wgAllowCopyUploads;
 917                 global $wgStylePath, $wgStyleVersion;
 918
 919                 $useAjaxDestCheck = $wgUseAjax && $wgAjaxUploadDestCheck;
 920                 $useAjaxLicensePreview = $wgUseAjax && $wgAjaxLicensePreview;
 921
 922                 $adc = wfBoolToStr( $useAjaxDestCheck );
 923                 $alp = wfBoolToStr( $useAjaxLicensePreview );
 924                 $autofill = wfBoolToStr( $this->mDesiredDestName == '' );
 925
 926                 $wgOut->addScript( "<script type=\"text/javascript\">
 927 wgAjaxUploadDestCheck = {$adc};
 928 wgAjaxLicensePreview = {$alp};
 929 wgUploadAutoFill = {$autofill};
 930 </script>
 931 <script type=\"text/javascript\" src=\"{$wgStylePath}/common/upload.js?{$wgStyleVersion}\"></script>
 932                 " );
 933
 934                 if( !wfRunHooks( 'UploadForm:initial', array( &$this ) ) )
 935                 {
 936                         wfDebug( "Hook 'UploadForm:initial' broke output of the upload form" );
 937                         return false;
 938                 }
 939
 940                 if( $this->mDesiredDestName ) {
 941                         $title = Title::makeTitleSafe( NS_IMAGE, $this->mDesiredDestName );
 942                         // Show a subtitle link to deleted revisions (to sysops et al only)
 943                         if( $title instanceof Title && ( $count = $title->isDeleted() ) > 0 && $wgUser->isAllowed( 'deletedhistory' ) ) {
 944                                 $link = wfMsgExt(
 945                                         $wgUser->isAllowed( 'delete' ) ? 'thisisdeleted' : 'viewdeleted',
 946                                         array( 'parse', 'replaceafter' ),
 947                                         $wgUser->getSkin()->makeKnownLinkObj(
 948                                                 SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedText() ),
 949                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $count )
 950                                         )
 951                                 );
 952                                 $wgOut->addHtml( "<div id=\"contentSub2\">{$link}</div>" );
 953                         }
 954
 955                         // Show the relevant lines from deletion log (for still deleted files only)
 956                         if( $title instanceof Title && $title->isDeleted() > 0 && !$title->exists() ) {
 957                                 $this->showDeletionLog( $wgOut, $title->getPrefixedText() );
 958                         }
 959                 }
 960
 961                 $cols = intval($wgUser->getOption( 'cols' ));
 962
 963                 if( $wgUser->getOption( 'editwidth' ) ) {
 964                         $width = " style=\"width:100%\"";
 965                 } else {
 966                         $width = '';
 967                 }
 968
 969                 if ( '' != $msg ) {
 970                         $sub = wfMsgHtml( 'uploaderror' );
 971                         $wgOut->addHTML( "<h2>{$sub}</h2>\n" .
 972                           "<span class='error'>{$msg}</span>\n" );
 973                 }
 974                 $wgOut->addHTML( '<div id="uploadtext">' );
 975                 $wgOut->addWikiMsg( 'uploadtext', $this->mDesiredDestName );
 976                 $wgOut->addHTML( "</div>\n" );
 977
 978                 # Print a list of allowed file extensions, if so configured.  We ignore
 979                 # MIME type here, it's incomprehensible to most people and too long.
 980                 global $wgCheckFileExtensions, $wgStrictFileExtensions,
 981                 $wgFileExtensions, $wgFileBlacklist;
 982
 983                 $allowedExtensions = '';
 984                 if( $wgCheckFileExtensions ) {
 985                         $delim = wfMsgExt( 'comma-separator', array( 'escapenoentities' ) );
 986                         if( $wgStrictFileExtensions ) {
 987                                 # Everything not permitted is banned
 988                                 $extensionsList =
 989                                         '<div id="mw-upload-permitted">' .
 990                                         wfMsgWikiHtml( 'upload-permitted', implode( $wgFileExtensions, $delim ) ) .
 991                                         "</div>\n";
 992                         } else {
 993                                 # We have to list both preferred and prohibited
 994                                 $extensionsList =
 995                                         '<div id="mw-upload-preferred">' .
 996                                         wfMsgWikiHtml( 'upload-preferred', implode( $wgFileExtensions, $delim ) ) .
 997                                         "</div>\n" .
 998                                         '<div id="mw-upload-prohibited">' .
 999                                         wfMsgWikiHtml( 'upload-prohibited', implode( $wgFileBlacklist, $delim ) ) .
1000                                         "</div>\n";
1001                         }
1002                 }
1003
1004                 $sourcefilename = wfMsgExt( 'sourcefilename', 'escapenoentities' );
1005                 $destfilename = wfMsgExt( 'destfilename', 'escapenoentities' );
1006                 $summary = wfMsgExt( 'fileuploadsummary', 'parseinline' );
1007
1008                 $licenses = new Licenses();
1009                 $license = wfMsgExt( 'license', array( 'parseinline' ) );
1010                 $nolicense = wfMsgHtml( 'nolicense' );
1011                 $licenseshtml = $licenses->getHtml();
1012
1013                 $ulb = wfMsgHtml( 'uploadbtn' );
1014
1015
1016                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
1017
1018                 $encDestName = htmlspecialchars( $this->mDesiredDestName );
1019
1020                 $watchChecked =
1021                         ( $wgUser->getOption( 'watchdefault' ) ||
1022                                 ( $wgUser->getOption( 'watchcreations' ) && $this->mDesiredDestName == '' ) )
1023                         ? 'checked="checked"'
1024                         : '';
1025                 $warningChecked = $this->mIgnoreWarning ? 'checked' : '';
1026
1027                 // Prepare form for upload or upload/copy
1028                 if( $wgAllowCopyUploads && $wgUser->isAllowed( 'upload_by_url' ) ) {
1029                         $filename_form =
1030                                 "<input type='radio' id='wpSourceTypeFile' name='wpSourceType' value='file' " .
1031                                    "onchange='toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\")' checked='checked' />" .
1032                                  "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1033                                    "onfocus='" .
1034                                      "toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\");" .
1035                                      "toggle_element_check(\"wpSourceTypeFile\",\"wpSourceTypeURL\")' " .
1036                                      "onchange='fillDestFilename(\"wpUploadFile\")' size='60' />" .
1037                                 wfMsgHTML( 'upload_source_file' ) . "<br/>" .
1038                                 "<input type='radio' id='wpSourceTypeURL' name='wpSourceType' value='web' " .
1039                                   "onchange='toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\")' />" .
1040                                 "<input tabindex='1' type='text' name='wpUploadFileURL' id='wpUploadFileURL' " .
1041                                   "onfocus='" .
1042                                     "toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\");" .
1043                                     "toggle_element_check(\"wpSourceTypeURL\",\"wpSourceTypeFile\")' " .
1044                                     "onchange='fillDestFilename(\"wpUploadFileURL\")' size='60' disabled='disabled' />" .
1045                                 wfMsgHtml( 'upload_source_url' ) ;
1046                 } else {
1047                         $filename_form =
1048                                 "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1049                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") .
1050                                 "size='60' />" .
1051                                 "<input type='hidden' name='wpSourceType' value='file' />" ;
1052                 }
1053                 if ( $useAjaxDestCheck ) {
1054                         $warningRow = "<tr><td colspan='2' id='wpDestFile-warning'>&nbsp;</td></tr>";
1055                         $destOnkeyup = 'onkeyup="wgUploadWarningObj.keypress();"';
1056                 } else {
1057                         $warningRow = '';
1058                         $destOnkeyup = '';
1059                 }
1060
1061                 $encComment = htmlspecialchars( $this->mComment );
1062
1063                 $wgOut->addHTML(
1064                          Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL(),
1065                                  'enctype' => 'multipart/form-data', 'id' => 'mw-upload-form' ) ) .
1066                          Xml::openElement( 'fieldset' ) .
1067                          Xml::element( 'legend', null, wfMsg( 'upload' ) ) .
1068                          Xml::openElement( 'table', array( 'border' => '0', 'id' => 'mw-upload-table' ) ) .
1069                          "<tr>
1070                                 {$this->uploadFormTextTop}
1071                                 <td class='mw-label'>
1072                                         <label for='wpUploadFile'>{$sourcefilename}</label>
1073                                 </td>
1074                                 <td class='mw-input'>
1075                                         {$filename_form}
1076                                 </td>
1077                         </tr>
1078                         <tr>
1079                                 <td></td>
1080                                 <td>
1081                                         {$extensionsList}
1082                                 </td>
1083                         </tr>
1084                         <tr>
1085                                 <td class='mw-label'>
1086                                         <label for='wpDestFile'>{$destfilename}</label>
1087                                 </td>
1088                                 <td class='mw-input'>
1089                                         <input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='60'
1090                                                 value=\"{$encDestName}\" onchange='toggleFilenameFiller()' $destOnkeyup />
1091                                 </td>
1092                         </tr>
1093                         <tr>
1094                                 <td class='mw-label'>
1095                                         <label for='wpUploadDescription'>{$summary}</label>
1096                                 </td>
1097                                 <td class='mw-input'>
1098                                         <textarea tabindex='3' name='wpUploadDescription' id='wpUploadDescription' rows='6'
1099                                                 cols='{$cols}'{$width}>$encComment</textarea>
1100                                         {$this->uploadFormTextAfterSummary}
1101                                 </td>
1102                         </tr>
1103                         <tr>"
1104                 );
1105
1106                 if ( $licenseshtml != '' ) {
1107                         global $wgStylePath;
1108                         $wgOut->addHTML( "
1109                                         <td class='mw-label'>
1110                                                 <label for='wpLicense'>$license</label>
1111                                         </td>
1112                                         <td class='mw-input'>
1113                                                 <select name='wpLicense' id='wpLicense' tabindex='4'
1114                                                         onchange='licenseSelectorCheck()'>
1115                                                         <option value=''>$nolicense</option>
1116                                                         $licenseshtml
1117                                                 </select>
1118                                         </td>
1119                                 </tr>
1120                                 <tr>"
1121                         );
1122                         if( $useAjaxLicensePreview ) {
1123                                 $wgOut->addHtml( "
1124                                                 <td></td>
1125                                                 <td id=\"mw-license-preview\"></td>
1126                                         </tr>
1127                                         <tr>"
1128                                 );
1129                         }
1130                 }
1131
1132                 if ( $wgUseCopyrightUpload ) {
1133                         $filestatus = wfMsgExt( 'filestatus', 'escapenoentities' );
1134                         $copystatus =  htmlspecialchars( $this->mCopyrightStatus );
1135                         $filesource = wfMsgExt( 'filesource', 'escapenoentities' );
1136                         $uploadsource = htmlspecialchars( $this->mCopyrightSource );
1137
1138                         $wgOut->addHTML( "
1139                                         <td class='mw-label' style='white-space: nowrap;'>
1140                                                 <label for='wpUploadCopyStatus'>$filestatus</label></td>
1141                                         <td class='mw-input'>
1142                                                 <input tabindex='5' type='text' name='wpUploadCopyStatus' id='wpUploadCopyStatus'
1143                                                         value=\"$copystatus\" size='60' />
1144                                         </td>
1145                                 </tr>
1146                                 <tr>
1147                                         <td class='mw-label'>
1148                                                 <label for='wpUploadCopyStatus'>$filesource</label>
1149                                         </td>
1150                                         <td class='mw-input'>
1151                                                 <input tabindex='6' type='text' name='wpUploadSource' id='wpUploadCopyStatus'
1152                                                         value=\"$uploadsource\" size='60' />
1153                                         </td>
1154                                 </tr>
1155                                 <tr>"
1156                         );
1157                 }
1158
1159                 $wgOut->addHtml( "
1160                                 <td></td>
1161                                 <td>
1162                                         <input tabindex='7' type='checkbox' name='wpWatchthis' id='wpWatchthis' $watchChecked value='true' />
1163                                         <label for='wpWatchthis'>" . wfMsgHtml( 'watchthisupload' ) . "</label>
1164                                         <input tabindex='8' type='checkbox' name='wpIgnoreWarning' id='wpIgnoreWarning' value='true' $warningChecked/>
1165                                         <label for='wpIgnoreWarning'>" . wfMsgHtml( 'ignorewarnings' ) . "</label>
1166                                 </td>
1167                         </tr>
1168                         $warningRow
1169                         <tr>
1170                                 <td></td>
1171                                         <td class='mw-input'>
1172                                                 <input tabindex='9' type='submit' name='wpUpload' value=\"{$ulb}\"" . $wgUser->getSkin()->tooltipAndAccesskey( 'upload' ) . " />
1173                                         </td>
1174                         </tr>
1175                         <tr>
1176                                 <td></td>
1177                                 <td class='mw-input'>"
1178                 );
1179                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1180                 $wgOut->addHTML( "
1181                                 </td>
1182                         </tr>" .
1183                         Xml::closeElement( 'table' ) .
1184                         Xml::hidden( 'wpDestFileWarningAck', '', array( 'id' => 'wpDestFileWarningAck' ) ) .
1185                         Xml::closeElement( 'fieldset' ) .
1186                         Xml::closeElement( 'form' )
1187                 );
1188                 $uploadfooter = wfMsgNoTrans( 'uploadfooter' );
1189                 if( $uploadfooter != '-' && !wfEmptyMsg( 'uploadfooter', $uploadfooter ) ){
1190                         $wgOut->addWikiText( Xml::tags( 'div',
1191                                 array( 'id' => 'mw-upload-footer-message' ), $uploadfooter ) );
1192                 }
1193         }
1194
1195         /* -------------------------------------------------------------- */
1196
1197         /**
1198          * Split a file into a base name and all dot-delimited 'extensions'
1199          * on the end. Some web server configurations will fall back to
1200          * earlier pseudo-'extensions' to determine type and execute
1201          * scripts, so the blacklist needs to check them all.
1202          *
1203          * @return array
1204          */
1205         function splitExtensions( $filename ) {
1206                 $bits = explode( '.', $filename );
1207                 $basename = array_shift( $bits );
1208                 return array( $basename, $bits );
1209         }
1210
1211         /**
1212          * Perform case-insensitive match against a list of file extensions.
1213          * Returns true if the extension is in the list.
1214          *
1215          * @param string $ext
1216          * @param array $list
1217          * @return bool
1218          */
1219         function checkFileExtension( $ext, $list ) {
1220                 return in_array( strtolower( $ext ), $list );
1221         }
1222
1223         /**
1224          * Perform case-insensitive match against a list of file extensions.
1225          * Returns true if any of the extensions are in the list.
1226          *
1227          * @param array $ext
1228          * @param array $list
1229          * @return bool
1230          */
1231         function checkFileExtensionList( $ext, $list ) {
1232                 foreach( $ext as $e ) {
1233                         if( in_array( strtolower( $e ), $list ) ) {
1234                                 return true;
1235                         }
1236                 }
1237                 return false;
1238         }
1239
1240         /**
1241          * Verifies that it's ok to include the uploaded file
1242          *
1243          * @param string $tmpfile the full path of the temporary file to verify
1244          * @param string $extension The filename extension that the file is to be served with
1245          * @return mixed true of the file is verified, a WikiError object otherwise.
1246          */
1247         function verify( $tmpfile, $extension ) {
1248                 #magically determine mime type
1249                 $magic=& MimeMagic::singleton();
1250                 $mime= $magic->guessMimeType($tmpfile,false);
1251
1252                 #check mime type, if desired
1253                 global $wgVerifyMimeType;
1254                 if ($wgVerifyMimeType) {
1255
1256                   wfDebug ( "\n\nmime: <$mime> extension: <$extension>\n\n");
1257                         #check mime type against file extension
1258                         if( !$this->verifyExtension( $mime, $extension ) ) {
1259                                 return new WikiErrorMsg( 'uploadcorrupt' );
1260                         }
1261
1262                         #check mime type blacklist
1263                         global $wgMimeTypeBlacklist;
1264                         if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist)
1265                                 && $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
1266                                 return new WikiErrorMsg( 'filetype-badmime', htmlspecialchars( $mime ) );
1267                         }
1268                 }
1269
1270                 #check for htmlish code and javascript
1271                 if( $this->detectScript ( $tmpfile, $mime, $extension ) ) {
1272                         return new WikiErrorMsg( 'uploadscripted' );
1273                 }
1274
1275                 /**
1276                 * Scan the uploaded file for viruses
1277                 */
1278                 $virus= $this->detectVirus($tmpfile);
1279                 if ( $virus ) {
1280                         return new WikiErrorMsg( 'uploadvirus', htmlspecialchars($virus) );
1281                 }
1282
1283                 wfDebug( __METHOD__.": all clear; passing.\n" );
1284                 return true;
1285         }
1286
1287         /**
1288          * Checks if the mime type of the uploaded file matches the file extension.
1289          *
1290          * @param string $mime the mime type of the uploaded file
1291          * @param string $extension The filename extension that the file is to be served with
1292          * @return bool
1293          */
1294         function verifyExtension( $mime, $extension ) {
1295                 $magic =& MimeMagic::singleton();
1296
1297                 if ( ! $mime || $mime == 'unknown' || $mime == 'unknown/unknown' )
1298                         if ( ! $magic->isRecognizableExtension( $extension ) ) {
1299                                 wfDebug( __METHOD__.": passing file with unknown detected mime type; " .
1300                                         "unrecognized extension '$extension', can't verify\n" );
1301                                 return true;
1302                         } else {
1303                                 wfDebug( __METHOD__.": rejecting file with unknown detected mime type; ".
1304                                         "recognized extension '$extension', so probably invalid file\n" );
1305                                 return false;
1306                         }
1307
1308                 $match= $magic->isMatchingExtension($extension,$mime);
1309
1310                 if ($match===NULL) {
1311                         wfDebug( __METHOD__.": no file extension known for mime type $mime, passing file\n" );
1312                         return true;
1313                 } elseif ($match===true) {
1314                         wfDebug( __METHOD__.": mime type $mime matches extension $extension, passing file\n" );
1315
1316                         #TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
1317                         return true;
1318
1319                 } else {
1320                         wfDebug( __METHOD__.": mime type $mime mismatches file extension $extension, rejecting file\n" );
1321                         return false;
1322                 }
1323         }
1324
1325         /**
1326          * Heuristic for detecting files that *could* contain JavaScript instructions or
1327          * things that may look like HTML to a browser and are thus
1328          * potentially harmful. The present implementation will produce false positives in some situations.
1329          *
1330          * @param string $file Pathname to the temporary upload file
1331          * @param string $mime The mime type of the file
1332          * @param string $extension The extension of the file
1333          * @return bool true if the file contains something looking like embedded scripts
1334          */
1335         function detectScript($file, $mime, $extension) {
1336                 global $wgAllowTitlesInSVG;
1337
1338                 #ugly hack: for text files, always look at the entire file.
1339                 #For binarie field, just check the first K.
1340
1341                 if (strpos($mime,'text/')===0) $chunk = file_get_contents( $file );
1342                 else {
1343                         $fp = fopen( $file, 'rb' );
1344                         $chunk = fread( $fp, 1024 );
1345                         fclose( $fp );
1346                 }
1347
1348                 $chunk= strtolower( $chunk );
1349
1350                 if (!$chunk) return false;
1351
1352                 #decode from UTF-16 if needed (could be used for obfuscation).
1353                 if (substr($chunk,0,2)=="\xfe\xff") $enc= "UTF-16BE";
1354                 elseif (substr($chunk,0,2)=="\xff\xfe") $enc= "UTF-16LE";
1355                 else $enc= NULL;
1356
1357                 if ($enc) $chunk= iconv($enc,"ASCII//IGNORE",$chunk);
1358
1359                 $chunk= trim($chunk);
1360
1361                 #FIXME: convert from UTF-16 if necessarry!
1362
1363                 wfDebug("SpecialUpload::detectScript: checking for embedded scripts and HTML stuff\n");
1364
1365                 #check for HTML doctype
1366                 if (eregi("<!DOCTYPE *X?HTML",$chunk)) return true;
1367
1368                 /**
1369                 * Internet Explorer for Windows performs some really stupid file type
1370                 * autodetection which can cause it to interpret valid image files as HTML
1371                 * and potentially execute JavaScript, creating a cross-site scripting
1372                 * attack vectors.
1373                 *
1374                 * Apple's Safari browser also performs some unsafe file type autodetection
1375                 * which can cause legitimate files to be interpreted as HTML if the
1376                 * web server is not correctly configured to send the right content-type
1377                 * (or if you're really uploading plain text and octet streams!)
1378                 *
1379                 * Returns true if IE is likely to mistake the given file for HTML.
1380                 * Also returns true if Safari would mistake the given file for HTML
1381                 * when served with a generic content-type.
1382                 */
1383
1384                 $tags = array(
1385                         '<body',
1386                         '<head',
1387                         '<html',   #also in safari
1388                         '<img',
1389                         '<pre',
1390                         '<script', #also in safari
1391                         '<table'
1392                         );
1393                 if( ! $wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
1394                         $tags[] = '<title';
1395                 }
1396
1397                 foreach( $tags as $tag ) {
1398                         if( false !== strpos( $chunk, $tag ) ) {
1399                                 return true;
1400                         }
1401                 }
1402
1403                 /*
1404                 * look for javascript
1405                 */
1406
1407                 #resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1408                 $chunk = Sanitizer::decodeCharReferences( $chunk );
1409
1410                 #look for script-types
1411                 if (preg_match('!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim',$chunk)) return true;
1412
1413                 #look for html-style script-urls
1414                 if (preg_match('!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1415
1416                 #look for css-style script-urls
1417                 if (preg_match('!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1418
1419                 wfDebug("SpecialUpload::detectScript: no scripts found\n");
1420                 return false;
1421         }
1422
1423         /**
1424          * Generic wrapper function for a virus scanner program.
1425          * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
1426          * $wgAntivirusRequired may be used to deny upload if the scan fails.
1427          *
1428          * @param string $file Pathname to the temporary upload file
1429          * @return mixed false if not virus is found, NULL if the scan fails or is disabled,
1430          *         or a string containing feedback from the virus scanner if a virus was found.
1431          *         If textual feedback is missing but a virus was found, this function returns true.
1432          */
1433         function detectVirus($file) {
1434                 global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
1435
1436                 if ( !$wgAntivirus ) {
1437                         wfDebug( __METHOD__.": virus scanner disabled\n");
1438                         return NULL;
1439                 }
1440
1441                 if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1442                         wfDebug( __METHOD__.": unknown virus scanner: $wgAntivirus\n" );
1443                         # @TODO: localise
1444                         $wgOut->addHTML( "<div class='error'>Bad configuration: unknown virus scanner: <i>$wgAntivirus</i></div>\n" );
1445                         return "unknown antivirus: $wgAntivirus";
1446                 }
1447
1448                 # look up scanner configuration
1449                 $command = $wgAntivirusSetup[$wgAntivirus]["command"];
1450                 $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]["codemap"];
1451                 $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]["messagepattern"] ) ?
1452                         $wgAntivirusSetup[$wgAntivirus]["messagepattern"] : null;
1453
1454                 if ( strpos( $command,"%f" ) === false ) {
1455                         # simple pattern: append file to scan
1456                         $command .= " " . wfEscapeShellArg( $file );
1457                 } else {
1458                         # complex pattern: replace "%f" with file to scan
1459                         $command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
1460                 }
1461
1462                 wfDebug( __METHOD__.": running virus scan: $command \n" );
1463
1464                 # execute virus scanner
1465                 $exitCode = false;
1466
1467                 #NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1468                 #      that does not seem to be worth the pain.
1469                 #      Ask me (Duesentrieb) about it if it's ever needed.
1470                 $output = array();
1471                 if ( wfIsWindows() ) {
1472                         exec( "$command", $output, $exitCode );
1473                 } else {
1474                         exec( "$command 2>&1", $output, $exitCode );
1475                 }
1476
1477                 # map exit code to AV_xxx constants.
1478                 $mappedCode = $exitCode;
1479                 if ( $exitCodeMap ) {
1480                         if ( isset( $exitCodeMap[$exitCode] ) ) {
1481                                 $mappedCode = $exitCodeMap[$exitCode];
1482                         } elseif ( isset( $exitCodeMap["*"] ) ) {
1483                                 $mappedCode = $exitCodeMap["*"];
1484                         }
1485                 }
1486
1487                 if ( $mappedCode === AV_SCAN_FAILED ) {
1488                         # scan failed (code was mapped to false by $exitCodeMap)
1489                         wfDebug( __METHOD__.": failed to scan $file (code $exitCode).\n" );
1490
1491                         if ( $wgAntivirusRequired ) {
1492                                 return "scan failed (code $exitCode)";
1493                         } else {
1494                                 return NULL;
1495                         }
1496                 } else if ( $mappedCode === AV_SCAN_ABORTED ) {
1497                         # scan failed because filetype is unknown (probably imune)
1498                         wfDebug( __METHOD__.": unsupported file type $file (code $exitCode).\n" );
1499                         return NULL;
1500                 } else if ( $mappedCode === AV_NO_VIRUS ) {
1501                         # no virus found
1502                         wfDebug( __METHOD__.": file passed virus scan.\n" );
1503                         return false;
1504                 } else {
1505                         $output = join( "\n", $output );
1506                         $output = trim( $output );
1507
1508                         if ( !$output ) {
1509                                 $output = true; #if there's no output, return true
1510                         } elseif ( $msgPattern ) {
1511                                 $groups = array();
1512                                 if ( preg_match( $msgPattern, $output, $groups ) ) {
1513                                         if ( $groups[1] ) {
1514                                                 $output = $groups[1];
1515                                         }
1516                                 }
1517                         }
1518
1519                         wfDebug( __METHOD__.": FOUND VIRUS! scanner feedback: $output" );
1520                         return $output;
1521                 }
1522         }
1523
1524         /**
1525          * Check if the temporary file is MacBinary-encoded, as some uploads
1526          * from Internet Explorer on Mac OS Classic and Mac OS X will be.
1527          * If so, the data fork will be extracted to a second temporary file,
1528          * which will then be checked for validity and either kept or discarded.
1529          *
1530          * @access private
1531          */
1532         function checkMacBinary() {
1533                 $macbin = new MacBinary( $this->mTempPath );
1534                 if( $macbin->isValid() ) {
1535                         $dataFile = tempnam( wfTempDir(), "WikiMacBinary" );
1536                         $dataHandle = fopen( $dataFile, 'wb' );
1537
1538                         wfDebug( "SpecialUpload::checkMacBinary: Extracting MacBinary data fork to $dataFile\n" );
1539                         $macbin->extractData( $dataHandle );
1540
1541                         $this->mTempPath = $dataFile;
1542                         $this->mFileSize = $macbin->dataForkLength();
1543
1544                         // We'll have to manually remove the new file if it's not kept.
1545                         $this->mRemoveTempFile = true;
1546                 }
1547                 $macbin->close();
1548         }
1549
1550         /**
1551          * If we've modified the upload file we need to manually remove it
1552          * on exit to clean up.
1553          * @access private
1554          */
1555         function cleanupTempFile() {
1556                 if ( $this->mRemoveTempFile && file_exists( $this->mTempPath ) ) {
1557                         wfDebug( "SpecialUpload::cleanupTempFile: Removing temporary file {$this->mTempPath}\n" );
1558                         unlink( $this->mTempPath );
1559                 }
1560         }
1561
1562         /**
1563          * Check if there's an overwrite conflict and, if so, if restrictions
1564          * forbid this user from performing the upload.
1565          *
1566          * @return mixed true on success, WikiError on failure
1567          * @access private
1568          */
1569         function checkOverwrite( $name ) {
1570                 $img = wfFindFile( $name );
1571
1572                 $error = '';
1573                 if( $img ) {
1574                         global $wgUser, $wgOut;
1575                         if( $img->isLocal() ) {
1576                                 if( !self::userCanReUpload( $wgUser, $img->name ) ) {
1577                                         $error = 'fileexists-forbidden';
1578                                 }
1579                         } else {
1580                                 if( !$wgUser->isAllowed( 'reupload' ) ||
1581                                     !$wgUser->isAllowed( 'reupload-shared' ) ) {
1582                                         $error = "fileexists-shared-forbidden";
1583                                 }
1584                         }
1585                 }
1586
1587                 if( $error ) {
1588                         $errorText = wfMsg( $error, wfEscapeWikiText( $img->getName() ) );
1589                         return $errorText;
1590                 }
1591
1592                 // Rockin', go ahead and upload
1593                 return true;
1594         }
1595
1596          /**
1597          * Check if a user is the last uploader
1598          *
1599          * @param User $user
1600          * @param string $img, image name
1601          * @return bool
1602          */
1603         public static function userCanReUpload( User $user, $img ) {
1604                 if( $user->isAllowed( 'reupload' ) )
1605                         return true; // non-conditional
1606                 if( !$user->isAllowed( 'reupload-own' ) )
1607                         return false;
1608
1609                 $dbr = wfGetDB( DB_SLAVE );
1610                 $row = $dbr->selectRow('image',
1611                 /* SELECT */ 'img_user',
1612                 /* WHERE */ array( 'img_name' => $img )
1613                 );
1614                 if ( !$row )
1615                         return false;
1616
1617                 return $user->getID() == $row->img_user;
1618         }
1619
1620         /**
1621          * Display an error with a wikitext description
1622          */
1623         function showError( $description ) {
1624                 global $wgOut;
1625                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
1626                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1627                 $wgOut->setArticleRelated( false );
1628                 $wgOut->enableClientCache( false );
1629                 $wgOut->addWikiText( $description );
1630         }
1631
1632         /**
1633          * Get the initial image page text based on a comment and optional file status information
1634          */
1635         static function getInitialPageText( $comment, $license, $copyStatus, $source ) {
1636                 global $wgUseCopyrightUpload;
1637                 if ( $wgUseCopyrightUpload ) {
1638                         if ( $license != '' ) {
1639                                 $licensetxt = '== ' . wfMsgForContent( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1640                         }
1641                         $pageText = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n" .
1642                           '== ' . wfMsgForContent ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
1643                           "$licensetxt" .
1644                           '== ' . wfMsgForContent ( 'filesource' ) . " ==\n" . $source ;
1645                 } else {
1646                         if ( $license != '' ) {
1647                                 $filedesc = $comment == '' ? '' : '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n";
1648                                  $pageText = $filedesc .
1649                                          '== ' . wfMsgForContent ( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1650                         } else {
1651                                 $pageText = $comment;
1652                         }
1653                 }
1654                 return $pageText;
1655         }
1656
1657         /**
1658          * If there are rows in the deletion log for this file, show them,
1659          * along with a nice little note for the user
1660          *
1661          * @param OutputPage $out
1662          * @param string filename
1663          */
1664         private function showDeletionLog( $out, $filename ) {
1665                 $reader = new LogReader(
1666                         new FauxRequest(
1667                                 array(
1668                                         'page' => $filename,
1669                                         'type' => 'delete',
1670                                         )
1671                         )
1672                 );
1673                 if( $reader->hasRows() ) {
1674                         $out->addHtml( '<div id="mw-upload-deleted-warn">' );
1675                         $out->addWikiMsg( 'upload-wasdeleted' );
1676                         $viewer = new LogViewer( $reader );
1677                         $viewer->showList( $out );
1678                         $out->addHtml( '</div>' );
1679                 }
1680         }
1681 }