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                 $this->mSrcName        = array_pop( explode( '/', $url ) );
 145                 $this->mSessionKey     = false;
 146                 $this->mStashed        = false;
 147
 148                 // PHP won't auto-cleanup the file
 149                 $this->mRemoveTempFile = file_exists( $local_file );
 150         }
 151
 152         /**
 153          * Safe copy from URL
 154          * Returns true if there was an error, false otherwise
 155          */
 156         private function curlCopy( $url, $dest ) {
 157                 global $wgUser, $wgOut;
 158
 159                 if( !$wgUser->isAllowed( 'upload_by_url' ) ) {
 160                         $wgOut->permissionRequired( 'upload_by_url' );
 161                         return true;
 162                 }
 163
 164                 # Maybe remove some pasting blanks :-)
 165                 $url =  trim( $url );
 166                 if( stripos($url, 'http://') !== 0 && stripos($url, 'ftp://') !== 0 ) {
 167                         # Only HTTP or FTP URLs
 168                         $wgOut->errorPage( 'upload-proto-error', 'upload-proto-error-text' );
 169                         return true;
 170                 }
 171
 172                 # Open temporary file
 173                 $this->mCurlDestHandle = @fopen( $this->mTempPath, "wb" );
 174                 if( $this->mCurlDestHandle === false ) {
 175                         # Could not open temporary file to write in
 176                         $wgOut->errorPage( 'upload-file-error', 'upload-file-error-text');
 177                         return true;
 178                 }
 179
 180                 $ch = curl_init();
 181                 curl_setopt( $ch, CURLOPT_HTTP_VERSION, 1.0); # Probably not needed, but apparently can work around some bug
 182                 curl_setopt( $ch, CURLOPT_TIMEOUT, 10); # 10 seconds timeout
 183                 curl_setopt( $ch, CURLOPT_LOW_SPEED_LIMIT, 512); # 0.5KB per second minimum transfer speed
 184                 curl_setopt( $ch, CURLOPT_URL, $url);
 185                 curl_setopt( $ch, CURLOPT_WRITEFUNCTION, array( $this, 'uploadCurlCallback' ) );
 186                 curl_exec( $ch );
 187                 $error = curl_errno( $ch ) ? true : false;
 188                 $errornum =  curl_errno( $ch );
 189                 // if ( $error ) print curl_error ( $ch ) ; # Debugging output
 190                 curl_close( $ch );
 191
 192                 fclose( $this->mCurlDestHandle );
 193                 unset( $this->mCurlDestHandle );
 194                 if( $error ) {
 195                         unlink( $dest );
 196                         if( wfEmptyMsg( "upload-curl-error$errornum", wfMsg("upload-curl-error$errornum") ) )
 197                                 $wgOut->errorPage( 'upload-misc-error', 'upload-misc-error-text' );
 198                         else
 199                                 $wgOut->errorPage( "upload-curl-error$errornum", "upload-curl-error$errornum-text" );
 200                 }
 201
 202                 return $error;
 203         }
 204
 205         /**
 206          * Callback function for CURL-based web transfer
 207          * Write data to file unless we've passed the length limit;
 208          * if so, abort immediately.
 209          * @access private
 210          */
 211         function uploadCurlCallback( $ch, $data ) {
 212                 global $wgMaxUploadSize;
 213                 $length = strlen( $data );
 214                 $this->mFileSize += $length;
 215                 if( $this->mFileSize > $wgMaxUploadSize ) {
 216                         return 0;
 217                 }
 218                 fwrite( $this->mCurlDestHandle, $data );
 219                 return $length;
 220         }
 221
 222         /**
 223          * Start doing stuff
 224          * @access public
 225          */
 226         function execute() {
 227                 global $wgUser, $wgOut;
 228                 global $wgEnableUploads;
 229
 230                 # Check uploading enabled
 231                 if( !$wgEnableUploads ) {
 232                         $wgOut->showErrorPage( 'uploaddisabled', 'uploaddisabledtext', array( $this->mDesiredDestName ) );
 233                         return;
 234                 }
 235
 236                 # Check permissions
 237                 if( !$wgUser->isAllowed( 'upload' ) ) {
 238                         if( !$wgUser->isLoggedIn() ) {
 239                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
 240                         } else {
 241                                 $wgOut->permissionRequired( 'upload' );
 242                         }
 243                         return;
 244                 }
 245
 246                 # Check blocks
 247                 if( $wgUser->isBlocked() ) {
 248                         $wgOut->blockedPage();
 249                         return;
 250                 }
 251
 252                 if( wfReadOnly() ) {
 253                         $wgOut->readOnlyPage();
 254                         return;
 255                 }
 256
 257                 if( $this->mReUpload ) {
 258                         if( !$this->unsaveUploadedFile() ) {
 259                                 return;
 260                         }
 261                         $this->mainUploadForm();
 262                 } else if( 'submit' == $this->mAction || $this->mUploadClicked ) {
 263                         $this->processUpload();
 264                 } else {
 265                         $this->mainUploadForm();
 266                 }
 267
 268                 $this->cleanupTempFile();
 269         }
 270
 271         /**
 272          * Do the upload
 273          * Checks are made in SpecialUpload::execute()
 274          *
 275          * @access private
 276          */
 277         function processUpload(){
 278                 global $wgUser, $wgOut, $wgFileExtensions;
 279                 $details = null;
 280                 $value = null;
 281                 $value = $this->internalProcessUpload( $details );
 282
 283                 switch($value) {
 284                         case self::SUCCESS:
 285                                 $wgOut->redirect( $this->mLocalFile->getTitle()->getFullURL() );
 286                                 break;
 287
 288                         case self::BEFORE_PROCESSING:
 289                                 break;
 290
 291                         case self::LARGE_FILE_SERVER:
 292                                 $this->mainUploadForm( wfMsgHtml( 'largefileserver' ) );
 293                                 break;
 294
 295                         case self::EMPTY_FILE:
 296                                 $this->mainUploadForm( wfMsgHtml( 'emptyfile' ) );
 297                                 break;
 298
 299                         case self::MIN_LENGHT_PARTNAME:
 300                                 $this->mainUploadForm( wfMsgHtml( 'minlength1' ) );
 301                                 break;
 302
 303                         case self::ILLEGAL_FILENAME:
 304                                 $filtered = $details['filtered'];
 305                                 $this->uploadError( wfMsgWikiHtml( 'illegalfilename', htmlspecialchars( $filtered ) ) );
 306                                 break;
 307
 308                         case self::PROTECTED_PAGE:
 309                                 $this->uploadError( wfMsgWikiHtml( 'protectedpage' ) );
 310                                 break;
 311
 312                         case self::OVERWRITE_EXISTING_FILE:
 313                                 $errorText = $details['overwrite'];
 314                                 $overwrite = new WikiError( $wgOut->parse( $errorText ) );
 315                                 $this->uploadError( $overwrite->toString() );
 316                                 break;
 317
 318                         case self::FILETYPE_MISSING:
 319                                 $this->uploadError( wfMsgExt( 'filetype-missing', array ( 'parseinline' ) ) );
 320                                 break;
 321
 322                         case self::FILETYPE_BADTYPE:
 323                                 $finalExt = $details['finalExt'];
 324                                 $this->uploadError( wfMsgExt( 'filetype-badtype', array ( 'parseinline' ), htmlspecialchars( $finalExt ), implode ( ', ', $wgFileExtensions ) ) );
 325                                 break;
 326
 327                         case self::VERIFICATION_ERROR:
 328                                 $veri = $details['veri'];
 329                                 $this->uploadError( $veri->toString() );
 330                                 break;
 331
 332                         case self::UPLOAD_VERIFICATION_ERROR:
 333                                 $error = $details['error'];
 334                                 $this->uploadError( $error );
 335                                 break;
 336
 337                         case self::UPLOAD_WARNING:
 338                                 $warning = $details['warning'];
 339                                 $this->uploadWarning( $warning );
 340                                 break;
 341
 342                         case self::INTERNAL_ERROR:
 343                                 $internal = $details['internal'];
 344                                 $this->showError( $internal );
 345                                 break;
 346
 347                         default:
 348                                 throw new MWException( __METHOD__ . ": Unknown value `{$value}`" );
 349                 }
 350         }
 351
 352         /**
 353          * Really do the upload
 354          * Checks are made in SpecialUpload::execute()
 355          *
 356          * @param array $resultDetails contains result-specific dict of additional values
 357          *
 358          * @access private
 359          */
 360         function internalProcessUpload( &$resultDetails ) {
 361                 global $wgUser;
 362
 363                 if( !wfRunHooks( 'UploadForm:BeforeProcessing', array( &$this ) ) )
 364                 {
 365                         wfDebug( "Hook 'UploadForm:BeforeProcessing' broke processing the file." );
 366                         return self::BEFORE_PROCESSING;
 367                 }
 368
 369                 /* Check for PHP error if any, requires php 4.2 or newer */
 370                 if( $this->mCurlError == 1/*UPLOAD_ERR_INI_SIZE*/ ) {
 371                         return self::LARGE_FILE_SERVER;
 372                 }
 373
 374                 /**
 375                  * If there was no filename or a zero size given, give up quick.
 376                  */
 377                 if( trim( $this->mSrcName ) == '' || empty( $this->mFileSize ) ) {
 378                         return self::EMPTY_FILE;
 379                 }
 380
 381                 # Chop off any directories in the given filename
 382                 if( $this->mDesiredDestName ) {
 383                         $basename = $this->mDesiredDestName;
 384                 } else {
 385                         $basename = $this->mSrcName;
 386                 }
 387                 $filtered = wfBaseName( $basename );
 388
 389                 /**
 390                  * We'll want to blacklist against *any* 'extension', and use
 391                  * only the final one for the whitelist.
 392                  */
 393                 list( $partname, $ext ) = $this->splitExtensions( $filtered );
 394
 395                 if( count( $ext ) ) {
 396                         $finalExt = $ext[count( $ext ) - 1];
 397                 } else {
 398                         $finalExt = '';
 399                 }
 400
 401                 # If there was more than one "extension", reassemble the base
 402                 # filename to prevent bogus complaints about length
 403                 if( count( $ext ) > 1 ) {
 404                         for( $i = 0; $i < count( $ext ) - 1; $i++ )
 405                                 $partname .= '.' . $ext[$i];
 406                 }
 407
 408                 if( strlen( $partname ) < 1 ) {
 409                         return self::MIN_LENGHT_PARTNAME;
 410                 }
 411
 412                 /**
 413                  * Filter out illegal characters, and try to make a legible name
 414                  * out of it. We'll strip some silently that Title would die on.
 415                  */
 416                 $filtered = preg_replace ( "/[^".Title::legalChars()."]|:/", '-', $filtered );
 417                 $nt = Title::makeTitleSafe( NS_IMAGE, $filtered );
 418                 if( is_null( $nt ) ) {
 419                         $resultDetails = array( 'filtered' => $filtered );
 420                         return self::ILLEGAL_FILENAME;
 421                 }
 422                 $this->mLocalFile = wfLocalFile( $nt );
 423                 $this->mDestName = $this->mLocalFile->getName();
 424
 425                 /**
 426                  * If the image is protected, non-sysop users won't be able
 427                  * to modify it by uploading a new revision.
 428                  */
 429                 if( !$nt->userCan( 'edit' ) ) {
 430                         return self::PROTECTED_PAGE;
 431                 }
 432
 433                 /**
 434                  * In some cases we may forbid overwriting of existing files.
 435                  */
 436                 $overwrite = $this->checkOverwrite( $this->mDestName );
 437                 if( $overwrite !== true ) {
 438                         $resultDetails = array( 'overwrite' => $overwrite );
 439                         return self::OVERWRITE_EXISTING_FILE;
 440                 }
 441
 442                 /* Don't allow users to override the blacklist (check file extension) */
 443                 global $wgStrictFileExtensions;
 444                 global $wgFileExtensions, $wgFileBlacklist;
 445                 if ($finalExt == '') {
 446                         return self::FILETYPE_MISSING;
 447                 } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) ||
 448                                 ($wgStrictFileExtensions && !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) ) {
 449                         $resultDetails = array( 'finalExt' => $finalExt );
 450                         return self::FILETYPE_BADTYPE;
 451                 }
 452
 453                 /**
 454                  * Look at the contents of the file; if we can recognize the
 455                  * type but it's corrupt or data of the wrong type, we should
 456                  * probably not accept it.
 457                  */
 458                 if( !$this->mStashed ) {
 459                         $this->mFileProps = File::getPropsFromPath( $this->mTempPath, $finalExt );
 460                         $this->checkMacBinary();
 461                         $veri = $this->verify( $this->mTempPath, $finalExt );
 462
 463                         if( $veri !== true ) { //it's a wiki error...
 464                                 $resultDetails = array( 'veri' => $veri );
 465                                 return self::VERIFICATION_ERROR;
 466                         }
 467
 468                         /**
 469                          * Provide an opportunity for extensions to add further checks
 470                          */
 471                         $error = '';
 472                         if( !wfRunHooks( 'UploadVerification',
 473                                         array( $this->mDestName, $this->mTempPath, &$error ) ) ) {
 474                                 $resultDetails = array( 'error' => $error );
 475                                 return self::UPLOAD_VERIFICATION_ERROR;
 476                         }
 477                 }
 478
 479
 480                 /**
 481                  * Check for non-fatal conditions
 482                  */
 483                 if ( ! $this->mIgnoreWarning ) {
 484                         $warning = '';
 485
 486                         global $wgCapitalLinks;
 487                         if( $wgCapitalLinks ) {
 488                                 $filtered = ucfirst( $filtered );
 489                         }
 490                         if( $basename != $filtered ) {
 491                                 $warning .=  '<li>'.wfMsgHtml( 'badfilename', htmlspecialchars( $this->mDestName ) ).'</li>';
 492                         }
 493
 494                         global $wgCheckFileExtensions;
 495                         if ( $wgCheckFileExtensions ) {
 496                                 if ( ! $this->checkFileExtension( $finalExt, $wgFileExtensions ) ) {
 497                                         $warning .= '<li>'.wfMsgExt( 'filetype-badtype', array ( 'parseinline' ),
 498                                                 htmlspecialchars( $finalExt ), implode ( ', ', $wgFileExtensions ) ).'</li>';
 499                                 }
 500                         }
 501
 502                         global $wgUploadSizeWarning;
 503                         if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) {
 504                                 $skin = $wgUser->getSkin();
 505                                 $wsize = $skin->formatSize( $wgUploadSizeWarning );
 506                                 $asize = $skin->formatSize( $this->mFileSize );
 507                                 $warning .= '<li>' . wfMsgHtml( 'large-file', $wsize, $asize ) . '</li>';
 508                         }
 509                         if ( $this->mFileSize == 0 ) {
 510                                 $warning .= '<li>'.wfMsgHtml( 'emptyfile' ).'</li>';
 511                         }
 512
 513                         if ( !$this->mDestWarningAck ) {
 514                                 $warning .= self::getExistsWarning( $this->mLocalFile );
 515                         }
 516                         if( $warning != '' ) {
 517                                 /**
 518                                  * Stash the file in a temporary location; the user can choose
 519                                  * to let it through and we'll complete the upload then.
 520                                  */
 521                                 $resultDetails = array( 'warning' => $warning );
 522                                 return self::UPLOAD_WARNING;
 523                         }
 524                 }
 525
 526                 /**
 527                  * Try actually saving the thing...
 528                  * It will show an error form on failure.
 529                  */
 530                 $pageText = self::getInitialPageText( $this->mComment, $this->mLicense,
 531                         $this->mCopyrightStatus, $this->mCopyrightSource );
 532
 533                 $status = $this->mLocalFile->upload( $this->mTempPath, $this->mComment, $pageText,
 534                         File::DELETE_SOURCE, $this->mFileProps );
 535                 if ( !$status->isGood() ) {
 536                         $resultDetails = array( 'internal' => $status->getWikiText() );
 537                         return self::INTERNAL_ERROR;
 538                 } else {
 539                         if ( $this->mWatchthis ) {
 540                                 global $wgUser;
 541                                 $wgUser->addWatch( $this->mLocalFile->getTitle() );
 542                         }
 543                         // Success, redirect to description page
 544                         $img = null; // @todo: added to avoid passing a ref to null - should this be defined somewhere?
 545                         wfRunHooks( 'UploadComplete', array( &$img ) );
 546                         return self::SUCCESS;
 547                 }
 548         }
 549
 550         /**
 551          * Do existence checks on a file and produce a warning
 552          * This check is static and can be done pre-upload via AJAX
 553          * Returns an HTML fragment consisting of one or more LI elements if there is a warning
 554          * Returns an empty string if there is no warning
 555          */
 556         static function getExistsWarning( $file ) {
 557                 global $wgUser;
 558                 // Check for uppercase extension. We allow these filenames but check if an image
 559                 // with lowercase extension exists already
 560                 $warning = '';
 561
 562                 if( strpos( $file->getName(), '.' ) == false ) {
 563                         $partname = $file->getName();
 564                         $rawExtension = '';
 565                 } else {
 566                         list( $partname, $rawExtension ) = explode( '.', $file->getName(), 2 );
 567                 }
 568                 $sk = $wgUser->getSkin();
 569
 570                 if ( $rawExtension != $file->getExtension() ) {
 571                         // We're not using the normalized form of the extension.
 572                         // Normal form is lowercase, using most common of alternate
 573                         // extensions (eg 'jpg' rather than 'JPEG').
 574                         //
 575                         // Check for another file using the normalized form...
 576                         $nt_lc = Title::newFromText( $partname . '.' . $file->getExtension() );
 577                         $file_lc = wfLocalFile( $nt_lc );
 578                 } else {
 579                         $file_lc = false;
 580                 }
 581
 582                 if( $file->exists() ) {
 583                         $dlink = $sk->makeKnownLinkObj( $file->getTitle() );
 584                         if ( $file->allowInlineDisplay() ) {
 585                                 $dlink2 = $sk->makeImageLinkObj( $file->getTitle(), wfMsgExt( 'fileexists-thumb', 'parseinline', $dlink ),
 586                                         $file->getName(), 'right', array(), false, true );
 587                         } elseif ( !$file->allowInlineDisplay() && $file->isSafeFile() ) {
 588                                 $icon = $file->iconThumb();
 589                                 $dlink2 = '<div style="float:right" id="mw-media-icon">' .
 590                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 591                         } else {
 592                                 $dlink2 = '';
 593                         }
 594
 595                         $warning .= '<li>' . wfMsgExt( 'fileexists', 'parseline', $dlink ) . '</li>' . $dlink2;
 596
 597                 } elseif ( $file_lc && $file_lc->exists() ) {
 598                         # Check if image with lowercase extension exists.
 599                         # It's not forbidden but in 99% it makes no sense to upload the same filename with uppercase extension
 600                         $dlink = $sk->makeKnownLinkObj( $nt_lc );
 601                         if ( $file_lc->allowInlineDisplay() ) {
 602                                 $dlink2 = $sk->makeImageLinkObj( $nt_lc, wfMsgExt( 'fileexists-thumb', 'parseinline', $dlink ),
 603                                         $nt_lc->getText(), 'right', array(), false, true );
 604                         } elseif ( !$file_lc->allowInlineDisplay() && $file_lc->isSafeFile() ) {
 605                                 $icon = $file_lc->iconThumb();
 606                                 $dlink2 = '<div style="float:right" id="mw-media-icon">' .
 607                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 608                         } else {
 609                                 $dlink2 = '';
 610                         }
 611
 612                         $warning .= '<li>' . wfMsgExt( 'fileexists-extension', 'parsemag', $file->getName(), $dlink ) . '</li>' . $dlink2;
 613
 614                 } elseif ( ( substr( $partname , 3, 3 ) == 'px-' || substr( $partname , 2, 3 ) == 'px-' )
 615                         && ereg( "[0-9]{2}" , substr( $partname , 0, 2) ) )
 616                 {
 617                         # Check for filenames like 50px- or 180px-, these are mostly thumbnails
 618                         $nt_thb = Title::newFromText( substr( $partname , strpos( $partname , '-' ) +1 ) . '.' . $rawExtension );
 619                         $file_thb = wfLocalFile( $nt_thb );
 620                         if ($file_thb->exists() ) {
 621                                 # Check if an image without leading '180px-' (or similiar) exists
 622                                 $dlink = $sk->makeKnownLinkObj( $nt_thb);
 623                                 if ( $file_thb->allowInlineDisplay() ) {
 624                                         $dlink2 = $sk->makeImageLinkObj( $nt_thb,
 625                                                 wfMsgExt( 'fileexists-thumb', 'parseinline', $dlink ),
 626                                                 $nt_thb->getText(), 'right', array(), false, true );
 627                                 } elseif ( !$file_thb->allowInlineDisplay() && $file_thb->isSafeFile() ) {
 628                                         $icon = $file_thb->iconThumb();
 629                                         $dlink2 = '<div style="float:right" id="mw-media-icon">' .
 630                                                 $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' .
 631                                                 $dlink . '</div>';
 632                                 } else {
 633                                         $dlink2 = '';
 634                                 }
 635
 636                                 $warning .= '<li>' . wfMsgExt( 'fileexists-thumbnail-yes', 'parsemag', $dlink ) .
 637                                         '</li>' . $dlink2;
 638                         } else {
 639                                 # Image w/o '180px-' does not exists, but we do not like these filenames
 640                                 $warning .= '<li>' . wfMsgExt( 'file-thumbnail-no', 'parseinline' ,
 641                                         substr( $partname , 0, strpos( $partname , '-' ) +1 ) ) . '</li>';
 642                         }
 643                 }
 644
 645                 $filenamePrefixBlacklist = self::getFilenamePrefixBlacklist();
 646                 # Do the match
 647                 foreach( $filenamePrefixBlacklist as $prefix ) {
 648                         if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
 649                                 $warning .= '<li>' . wfMsgExt( 'filename-bad-prefix', 'parseinline', $prefix ) . '</li>';
 650                                 break;
 651                         }
 652                 }
 653
 654                 if ( $file->wasDeleted() && !$file->exists() ) {
 655                         # If the file existed before and was deleted, warn the user of this
 656                         # Don't bother doing so if the file exists now, however
 657                         $ltitle = SpecialPage::getTitleFor( 'Log' );
 658                         $llink = $sk->makeKnownLinkObj( $ltitle, wfMsgHtml( 'deletionlog' ),
 659                                 'type=delete&page=' . $file->getTitle()->getPrefixedUrl() );
 660                         $warning .= '<li>' . wfMsgWikiHtml( 'filewasdeleted', $llink ) . '</li>';
 661                 }
 662                 return $warning;
 663         }
 664
 665         /**
 666          * Get a list of warnings
 667          *
 668          * @param string local filename, e.g. 'file exists', 'non-descriptive filename'
 669          * @return array list of warning messages
 670          */
 671         static function ajaxGetExistsWarning( $filename ) {
 672                 $file = wfFindFile( $filename );
 673                 if( !$file ) {
 674                         // Force local file so we have an object to do further checks against
 675                         // if there isn't an exact match...
 676                         $file = wfLocalFile( $filename );
 677                 }
 678                 $s = '&nbsp;';
 679                 if ( $file ) {
 680                         $warning = self::getExistsWarning( $file );
 681                         if ( $warning !== '' ) {
 682                                 $s = "<ul>$warning</ul>";
 683                         }
 684                 }
 685                 return $s;
 686         }
 687
 688         /**
 689          * Render a preview of a given license for the AJAX preview on upload
 690          *
 691          * @param string $license
 692          * @return string
 693          */
 694         public static function ajaxGetLicensePreview( $license ) {
 695                 global $wgParser, $wgUser;
 696                 $text = '{{' . $license . '}}';
 697                 $title = Title::makeTitle( NS_IMAGE, 'Sample.jpg' );
 698                 $options = ParserOptions::newFromUser( $wgUser );
 699
 700                 // Expand subst: first, then live templates...
 701                 $text = $wgParser->preSaveTransform( $text, $title, $wgUser, $options );
 702                 $output = $wgParser->parse( $text, $title, $options );
 703
 704                 return $output->getText();
 705         }
 706
 707         /**
 708          * Get a list of blacklisted filename prefixes from [[MediaWiki:filename-prefix-blacklist]]
 709          *
 710          * @return array list of prefixes
 711          */
 712         public static function getFilenamePrefixBlacklist() {
 713                 $blacklist = array();
 714                 $message = wfMsgForContent( 'filename-prefix-blacklist' );
 715                 if( $message && !( wfEmptyMsg( 'filename-prefix-blacklist', $message ) || $message == '-' ) ) {
 716                         $lines = explode( "\n", $message );
 717                         foreach( $lines as $line ) {
 718                                 // Remove comment lines
 719                                 $comment = substr( trim( $line ), 0, 1 );
 720                                 if ( $comment == '#' || $comment == '' ) {
 721                                         continue;
 722                                 }
 723                                 // Remove additional comments after a prefix
 724                                 $comment = strpos( $line, '#' );
 725                                 if ( $comment > 0 ) {
 726                                         $line = substr( $line, 0, $comment-1 );
 727                                 }
 728                                 $blacklist[] = trim( $line );
 729                         }
 730                 }
 731                 return $blacklist;
 732         }
 733
 734         /**
 735          * Stash a file in a temporary directory for later processing
 736          * after the user has confirmed it.
 737          *
 738          * If the user doesn't explicitly cancel or accept, these files
 739          * can accumulate in the temp directory.
 740          *
 741          * @param string $saveName - the destination filename
 742          * @param string $tempName - the source temporary file to save
 743          * @return string - full path the stashed file, or false on failure
 744          * @access private
 745          */
 746         function saveTempUploadedFile( $saveName, $tempName ) {
 747                 global $wgOut;
 748                 $repo = RepoGroup::singleton()->getLocalRepo();
 749                 $status = $repo->storeTemp( $saveName, $tempName );
 750                 if ( !$status->isGood() ) {
 751                         $this->showError( $status->getWikiText() );
 752                         return false;
 753                 } else {
 754                         return $status->value;
 755                 }
 756         }
 757
 758         /**
 759          * Stash a file in a temporary directory for later processing,
 760          * and save the necessary descriptive info into the session.
 761          * Returns a key value which will be passed through a form
 762          * to pick up the path info on a later invocation.
 763          *
 764          * @return int
 765          * @access private
 766          */
 767         function stashSession() {
 768                 $stash = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath );
 769
 770                 if( !$stash ) {
 771                         # Couldn't save the file.
 772                         return false;
 773                 }
 774
 775                 $key = mt_rand( 0, 0x7fffffff );
 776                 $_SESSION['wsUploadData'][$key] = array(
 777                         'mTempPath'       => $stash,
 778                         'mFileSize'       => $this->mFileSize,
 779                         'mSrcName'        => $this->mSrcName,
 780                         'mFileProps'      => $this->mFileProps,
 781                         'version'         => self::SESSION_VERSION,
 782                 );
 783                 return $key;
 784         }
 785
 786         /**
 787          * Remove a temporarily kept file stashed by saveTempUploadedFile().
 788          * @access private
 789          * @return success
 790          */
 791         function unsaveUploadedFile() {
 792                 global $wgOut;
 793                 $repo = RepoGroup::singleton()->getLocalRepo();
 794                 $success = $repo->freeTemp( $this->mTempPath );
 795                 if ( ! $success ) {
 796                         $wgOut->showFileDeleteError( $this->mTempPath );
 797                         return false;
 798                 } else {
 799                         return true;
 800                 }
 801         }
 802
 803         /* -------------------------------------------------------------- */
 804
 805         /**
 806          * @param string $error as HTML
 807          * @access private
 808          */
 809         function uploadError( $error ) {
 810                 global $wgOut;
 811                 $wgOut->addHTML( "<h2>" . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 812                 $wgOut->addHTML( "<span class='error'>{$error}</span>\n" );
 813         }
 814
 815         /**
 816          * There's something wrong with this file, not enough to reject it
 817          * totally but we require manual intervention to save it for real.
 818          * Stash it away, then present a form asking to confirm or cancel.
 819          *
 820          * @param string $warning as HTML
 821          * @access private
 822          */
 823         function uploadWarning( $warning ) {
 824                 global $wgOut, $wgContLang;
 825                 global $wgUseCopyrightUpload;
 826
 827                 $this->mSessionKey = $this->stashSession();
 828                 if( !$this->mSessionKey ) {
 829                         # Couldn't save file; an error has been displayed so let's go.
 830                         return;
 831                 }
 832
 833                 $wgOut->addHTML( "<h2>" . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 834                 $wgOut->addHTML( "<ul class='warning'>{$warning}</ul><br />\n" );
 835
 836                 $save = wfMsgHtml( 'savefile' );
 837                 $reupload = wfMsgHtml( 'reupload' );
 838                 $iw = wfMsgWikiHtml( 'ignorewarning' );
 839                 $reup = wfMsgWikiHtml( 'reuploaddesc' );
 840                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
 841                 $action = $titleObj->escapeLocalURL( 'action=submit' );
 842                 $align1 = $wgContLang->isRTL() ? 'left' : 'right';
 843                 $align2 = $wgContLang->isRTL() ? 'right' : 'left';
 844
 845                 if ( $wgUseCopyrightUpload )
 846                 {
 847                         $copyright =  "
 848         <input type='hidden' name='wpUploadCopyStatus' value=\"" . htmlspecialchars( $this->mCopyrightStatus ) . "\" />
 849         <input type='hidden' name='wpUploadSource' value=\"" . htmlspecialchars( $this->mCopyrightSource ) . "\" />
 850         ";
 851                 } else {
 852                         $copyright = "";
 853                 }
 854
 855                 $wgOut->addHTML( "
 856         <form id='uploadwarning' method='post' enctype='multipart/form-data' action='$action'>
 857                 <input type='hidden' name='wpIgnoreWarning' value='1' />
 858                 <input type='hidden' name='wpSessionKey' value=\"" . htmlspecialchars( $this->mSessionKey ) . "\" />
 859                 <input type='hidden' name='wpUploadDescription' value=\"" . htmlspecialchars( $this->mComment ) . "\" />
 860                 <input type='hidden' name='wpLicense' value=\"" . htmlspecialchars( $this->mLicense ) . "\" />
 861                 <input type='hidden' name='wpDestFile' value=\"" . htmlspecialchars( $this->mDesiredDestName ) . "\" />
 862                 <input type='hidden' name='wpWatchthis' value=\"" . htmlspecialchars( intval( $this->mWatchthis ) ) . "\" />
 863         {$copyright}
 864         <table border='0'>
 865                 <tr>
 866                         <tr>
 867                                 <td align='$align1'>
 868                                         <input tabindex='2' type='submit' name='wpUpload' value=\"$save\" />
 869                                 </td>
 870                                 <td align='$align2'>$iw</td>
 871                         </tr>
 872                         <tr>
 873                                 <td align='$align1'>
 874                                         <input tabindex='2' type='submit' name='wpReUpload' value=\"{$reupload}\" />
 875                                 </td>
 876                                 <td align='$align2'>$reup</td>
 877                         </tr>
 878                 </tr>
 879         </table></form>\n" );
 880         }
 881
 882         /**
 883          * Displays the main upload form, optionally with a highlighted
 884          * error message up at the top.
 885          *
 886          * @param string $msg as HTML
 887          * @access private
 888          */
 889         function mainUploadForm( $msg='' ) {
 890                 global $wgOut, $wgUser, $wgContLang;
 891                 global $wgUseCopyrightUpload, $wgUseAjax, $wgAjaxUploadDestCheck, $wgAjaxLicensePreview;
 892                 global $wgRequest, $wgAllowCopyUploads;
 893                 global $wgStylePath, $wgStyleVersion;
 894
 895                 $useAjaxDestCheck = $wgUseAjax && $wgAjaxUploadDestCheck;
 896                 $useAjaxLicensePreview = $wgUseAjax && $wgAjaxLicensePreview;
 897
 898                 $adc = wfBoolToStr( $useAjaxDestCheck );
 899                 $alp = wfBoolToStr( $useAjaxLicensePreview );
 900
 901                 $wgOut->addScript( "<script type=\"text/javascript\">
 902 wgAjaxUploadDestCheck = {$adc};
 903 wgAjaxLicensePreview = {$alp};
 904 </script>
 905 <script type=\"text/javascript\" src=\"{$wgStylePath}/common/upload.js?{$wgStyleVersion}\"></script>
 906                 " );
 907
 908                 if( !wfRunHooks( 'UploadForm:initial', array( &$this ) ) )
 909                 {
 910                         wfDebug( "Hook 'UploadForm:initial' broke output of the upload form" );
 911                         return false;
 912                 }
 913
 914                 if( $this->mDesiredDestName ) {
 915                         $title = Title::makeTitleSafe( NS_IMAGE, $this->mDesiredDestName );
 916                         // Show a subtitle link to deleted revisions (to sysops et al only)
 917                         if( $title instanceof Title && ( $count = $title->isDeleted() ) > 0 && $wgUser->isAllowed( 'deletedhistory' ) ) {
 918                                 $link = wfMsgExt(
 919                                         $wgUser->isAllowed( 'delete' ) ? 'thisisdeleted' : 'viewdeleted',
 920                                         array( 'parse', 'replaceafter' ),
 921                                         $wgUser->getSkin()->makeKnownLinkObj(
 922                                                 SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedText() ),
 923                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $count )
 924                                         )
 925                                 );
 926                                 $wgOut->addHtml( "<div id=\"contentSub2\">{$link}</div>" );
 927                         }
 928
 929                         // Show the relevant lines from deletion log (for still deleted files only)
 930                         if( $title instanceof Title && $title->isDeleted() > 0 && !$title->exists() ) {
 931                                 $this->showDeletionLog( $wgOut, $title->getPrefixedText() );
 932                         }
 933                 }
 934
 935                 $cols = intval($wgUser->getOption( 'cols' ));
 936                 $ew = $wgUser->getOption( 'editwidth' );
 937                 if ( $ew ) $ew = " style=\"width:100%\"";
 938                 else $ew = '';
 939
 940                 if ( '' != $msg ) {
 941                         $sub = wfMsgHtml( 'uploaderror' );
 942                         $wgOut->addHTML( "<h2>{$sub}</h2>\n" .
 943                           "<span class='error'>{$msg}</span>\n" );
 944                 }
 945                 $wgOut->addHTML( '<div id="uploadtext">' );
 946                 $wgOut->addWikiText( wfMsgNoTrans( 'uploadtext', $this->mDesiredDestName ) );
 947                 $wgOut->addHTML( '</div>' );
 948
 949                 $sourcefilename = wfMsgHtml( 'sourcefilename' );
 950                 $destfilename = wfMsgHtml( 'destfilename' );
 951                 $summary = wfMsgExt( 'fileuploadsummary', 'parseinline' );
 952
 953                 $licenses = new Licenses();
 954                 $license = wfMsgExt( 'license', array( 'parseinline' ) );
 955                 $nolicense = wfMsgHtml( 'nolicense' );
 956                 $licenseshtml = $licenses->getHtml();
 957
 958                 $ulb = wfMsgHtml( 'uploadbtn' );
 959
 960
 961                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
 962                 $action = $titleObj->escapeLocalURL();
 963
 964                 $encDestName = htmlspecialchars( $this->mDesiredDestName );
 965
 966                 $watchChecked =
 967                         ( $wgUser->getOption( 'watchdefault' ) ||
 968                                 ( $wgUser->getOption( 'watchcreations' ) && $this->mDesiredDestName == '' ) )
 969                         ? 'checked="checked"'
 970                         : '';
 971                 $warningChecked = $this->mIgnoreWarning ? 'checked' : '';
 972
 973                 // Prepare form for upload or upload/copy
 974                 if( $wgAllowCopyUploads && $wgUser->isAllowed( 'upload_by_url' ) ) {
 975                         $filename_form =
 976                                 "<input type='radio' id='wpSourceTypeFile' name='wpSourceType' value='file' " .
 977                                    "onchange='toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\")' checked />" .
 978                                  "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
 979                                    "onfocus='" .
 980                                      "toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\");" .
 981                                      "toggle_element_check(\"wpSourceTypeFile\",\"wpSourceTypeURL\")'" .
 982                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") . "size='40' />" .
 983                                 wfMsgHTML( 'upload_source_file' ) . "<br/>" .
 984                                 "<input type='radio' id='wpSourceTypeURL' name='wpSourceType' value='web' " .
 985                                   "onchange='toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\")' />" .
 986                                 "<input tabindex='1' type='text' name='wpUploadFileURL' id='wpUploadFileURL' " .
 987                                   "onfocus='" .
 988                                     "toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\");" .
 989                                     "toggle_element_check(\"wpSourceTypeURL\",\"wpSourceTypeFile\")'" .
 990                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFileURL\")' ") . "size='40' DISABLED />" .
 991                                 wfMsgHtml( 'upload_source_url' ) ;
 992                 } else {
 993                         $filename_form =
 994                                 "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
 995                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") .
 996                                 "size='40' />" .
 997                                 "<input type='hidden' name='wpSourceType' value='file' />" ;
 998                 }
 999                 if ( $useAjaxDestCheck ) {
1000                         $warningRow = "<tr><td colspan='2' id='wpDestFile-warning'>&nbsp;</td></tr>";
1001                         $destOnkeyup = 'onkeyup="wgUploadWarningObj.keypress();"';
1002                 } else {
1003                         $warningRow = '';
1004                         $destOnkeyup = '';
1005                 }
1006
1007                 $encComment = htmlspecialchars( $this->mComment );
1008                 $align1 = $wgContLang->isRTL() ? 'left' : 'right';
1009                 $align2 = $wgContLang->isRTL() ? 'right' : 'left';
1010
1011                 $wgOut->addHTML( <<<EOT
1012         <form id='upload' method='post' enctype='multipart/form-data' action="$action">
1013                 <table border='0'>
1014                 <tr>
1015           {$this->uploadFormTextTop}
1016                         <td align='$align1' valign='top'><label for='wpUploadFile'>{$sourcefilename}:</label></td>
1017                         <td align='$align2'>
1018                                 {$filename_form}
1019                         </td>
1020                 </tr>
1021                 <tr>
1022                         <td align='$align1'><label for='wpDestFile'>{$destfilename}:</label></td>
1023                         <td align='$align2'>
1024                                 <input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='40'
1025                                         value="$encDestName" $destOnkeyup />
1026                         </td>
1027                 </tr>
1028                 <tr>
1029                         <td align='$align1'><label for='wpUploadDescription'>{$summary}</label></td>
1030                         <td align='$align2'>
1031                                 <textarea tabindex='3' name='wpUploadDescription' id='wpUploadDescription' rows='6'
1032                                         cols='{$cols}'{$ew}>$encComment</textarea>
1033            {$this->uploadFormTextAfterSummary}
1034                         </td>
1035                 </tr>
1036                 <tr>
1037 EOT
1038                 );
1039
1040                 if ( $licenseshtml != '' ) {
1041                         global $wgStylePath;
1042                         $wgOut->addHTML( "
1043                         <td align='$align1'><label for='wpLicense'>$license:</label></td>
1044                         <td align='$align2'>
1045                                 <select name='wpLicense' id='wpLicense' tabindex='4'
1046                                         onchange='licenseSelectorCheck()'>
1047                                         <option value=''>$nolicense</option>
1048                                         $licenseshtml
1049                                 </select>
1050                         </td>
1051                         </tr>
1052                         <tr>" );
1053                         if( $useAjaxLicensePreview ) {
1054                                 $wgOut->addHtml( "
1055                                         <td></td>
1056                                         <td id=\"mw-license-preview\"></td>
1057                                 </tr>
1058                                 <tr>" );
1059                         }
1060                 }
1061
1062                 if ( $wgUseCopyrightUpload ) {
1063                         $filestatus = wfMsgHtml ( 'filestatus' );
1064                         $copystatus =  htmlspecialchars( $this->mCopyrightStatus );
1065                         $filesource = wfMsgHtml ( 'filesource' );
1066                         $uploadsource = htmlspecialchars( $this->mCopyrightSource );
1067
1068                         $wgOut->addHTML( "
1069                                 <td align='$align1' nowrap='nowrap'><label for='wpUploadCopyStatus'>$filestatus:</label></td>
1070                                         <td><input tabindex='5' type='text' name='wpUploadCopyStatus' id='wpUploadCopyStatus'
1071                                           value=\"$copystatus\" size='40' /></td>
1072                         </tr>
1073                         <tr>
1074                                 <td align='$align1'><label for='wpUploadCopyStatus'>$filesource:</label></td>
1075                                         <td><input tabindex='6' type='text' name='wpUploadSource' id='wpUploadCopyStatus'
1076                                           value=\"$uploadsource\" size='40' /></td>
1077                         </tr>
1078                         <tr>
1079                 ");
1080                 }
1081
1082                 $wgOut->addHtml( "
1083                 <td></td>
1084                 <td>
1085                         <input tabindex='7' type='checkbox' name='wpWatchthis' id='wpWatchthis' $watchChecked value='true' />
1086                         <label for='wpWatchthis'>" . wfMsgHtml( 'watchthisupload' ) . "</label>
1087                         <input tabindex='8' type='checkbox' name='wpIgnoreWarning' id='wpIgnoreWarning' value='true' $warningChecked/>
1088                         <label for='wpIgnoreWarning'>" . wfMsgHtml( 'ignorewarnings' ) . "</label>
1089                 </td>
1090         </tr>
1091         $warningRow
1092         <tr>
1093                 <td></td>
1094                 <td align='$align2'><input tabindex='9' type='submit' name='wpUpload' value=\"{$ulb}\"" . $wgUser->getSkin()->tooltipAndAccesskey( 'upload' ) . " /></td>
1095         </tr>
1096         <tr>
1097                 <td></td>
1098                 <td align='$align2'>
1099                 " );
1100                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1101                 $wgOut->addHTML( "
1102                 </td>
1103         </tr>
1104
1105         </table>
1106         <input type='hidden' name='wpDestFileWarningAck' id='wpDestFileWarningAck' value=''/>
1107         </form>" );
1108         }
1109
1110         /* -------------------------------------------------------------- */
1111
1112         /**
1113          * Split a file into a base name and all dot-delimited 'extensions'
1114          * on the end. Some web server configurations will fall back to
1115          * earlier pseudo-'extensions' to determine type and execute
1116          * scripts, so the blacklist needs to check them all.
1117          *
1118          * @return array
1119          */
1120         function splitExtensions( $filename ) {
1121                 $bits = explode( '.', $filename );
1122                 $basename = array_shift( $bits );
1123                 return array( $basename, $bits );
1124         }
1125
1126         /**
1127          * Perform case-insensitive match against a list of file extensions.
1128          * Returns true if the extension is in the list.
1129          *
1130          * @param string $ext
1131          * @param array $list
1132          * @return bool
1133          */
1134         function checkFileExtension( $ext, $list ) {
1135                 return in_array( strtolower( $ext ), $list );
1136         }
1137
1138         /**
1139          * Perform case-insensitive match against a list of file extensions.
1140          * Returns true if any of the extensions are in the list.
1141          *
1142          * @param array $ext
1143          * @param array $list
1144          * @return bool
1145          */
1146         function checkFileExtensionList( $ext, $list ) {
1147                 foreach( $ext as $e ) {
1148                         if( in_array( strtolower( $e ), $list ) ) {
1149                                 return true;
1150                         }
1151                 }
1152                 return false;
1153         }
1154
1155         /**
1156          * Verifies that it's ok to include the uploaded file
1157          *
1158          * @param string $tmpfile the full path of the temporary file to verify
1159          * @param string $extension The filename extension that the file is to be served with
1160          * @return mixed true of the file is verified, a WikiError object otherwise.
1161          */
1162         function verify( $tmpfile, $extension ) {
1163                 #magically determine mime type
1164                 $magic=& MimeMagic::singleton();
1165                 $mime= $magic->guessMimeType($tmpfile,false);
1166
1167                 #check mime type, if desired
1168                 global $wgVerifyMimeType;
1169                 if ($wgVerifyMimeType) {
1170
1171                   wfDebug ( "\n\nmime: <$mime> extension: <$extension>\n\n");
1172                         #check mime type against file extension
1173                         if( !$this->verifyExtension( $mime, $extension ) ) {
1174                                 return new WikiErrorMsg( 'uploadcorrupt' );
1175                         }
1176
1177                         #check mime type blacklist
1178                         global $wgMimeTypeBlacklist;
1179                         if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist)
1180                                 && $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
1181                                 return new WikiErrorMsg( 'filetype-badmime', htmlspecialchars( $mime ) );
1182                         }
1183                 }
1184
1185                 #check for htmlish code and javascript
1186                 if( $this->detectScript ( $tmpfile, $mime, $extension ) ) {
1187                         return new WikiErrorMsg( 'uploadscripted' );
1188                 }
1189
1190                 /**
1191                 * Scan the uploaded file for viruses
1192                 */
1193                 $virus= $this->detectVirus($tmpfile);
1194                 if ( $virus ) {
1195                         return new WikiErrorMsg( 'uploadvirus', htmlspecialchars($virus) );
1196                 }
1197
1198                 wfDebug( __METHOD__.": all clear; passing.\n" );
1199                 return true;
1200         }
1201
1202         /**
1203          * Checks if the mime type of the uploaded file matches the file extension.
1204          *
1205          * @param string $mime the mime type of the uploaded file
1206          * @param string $extension The filename extension that the file is to be served with
1207          * @return bool
1208          */
1209         function verifyExtension( $mime, $extension ) {
1210                 $magic =& MimeMagic::singleton();
1211
1212                 if ( ! $mime || $mime == 'unknown' || $mime == 'unknown/unknown' )
1213                         if ( ! $magic->isRecognizableExtension( $extension ) ) {
1214                                 wfDebug( __METHOD__.": passing file with unknown detected mime type; " .
1215                                         "unrecognized extension '$extension', can't verify\n" );
1216                                 return true;
1217                         } else {
1218                                 wfDebug( __METHOD__.": rejecting file with unknown detected mime type; ".
1219                                         "recognized extension '$extension', so probably invalid file\n" );
1220                                 return false;
1221                         }
1222
1223                 $match= $magic->isMatchingExtension($extension,$mime);
1224
1225                 if ($match===NULL) {
1226                         wfDebug( __METHOD__.": no file extension known for mime type $mime, passing file\n" );
1227                         return true;
1228                 } elseif ($match===true) {
1229                         wfDebug( __METHOD__.": mime type $mime matches extension $extension, passing file\n" );
1230
1231                         #TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
1232                         return true;
1233
1234                 } else {
1235                         wfDebug( __METHOD__.": mime type $mime mismatches file extension $extension, rejecting file\n" );
1236                         return false;
1237                 }
1238         }
1239
1240         /**
1241          * Heuristic for detecting files that *could* contain JavaScript instructions or
1242          * things that may look like HTML to a browser and are thus
1243          * potentially harmful. The present implementation will produce false positives in some situations.
1244          *
1245          * @param string $file Pathname to the temporary upload file
1246          * @param string $mime The mime type of the file
1247          * @param string $extension The extension of the file
1248          * @return bool true if the file contains something looking like embedded scripts
1249          */
1250         function detectScript($file, $mime, $extension) {
1251                 global $wgAllowTitlesInSVG;
1252
1253                 #ugly hack: for text files, always look at the entire file.
1254                 #For binarie field, just check the first K.
1255
1256                 if (strpos($mime,'text/')===0) $chunk = file_get_contents( $file );
1257                 else {
1258                         $fp = fopen( $file, 'rb' );
1259                         $chunk = fread( $fp, 1024 );
1260                         fclose( $fp );
1261                 }
1262
1263                 $chunk= strtolower( $chunk );
1264
1265                 if (!$chunk) return false;
1266
1267                 #decode from UTF-16 if needed (could be used for obfuscation).
1268                 if (substr($chunk,0,2)=="\xfe\xff") $enc= "UTF-16BE";
1269                 elseif (substr($chunk,0,2)=="\xff\xfe") $enc= "UTF-16LE";
1270                 else $enc= NULL;
1271
1272                 if ($enc) $chunk= iconv($enc,"ASCII//IGNORE",$chunk);
1273
1274                 $chunk= trim($chunk);
1275
1276                 #FIXME: convert from UTF-16 if necessarry!
1277
1278                 wfDebug("SpecialUpload::detectScript: checking for embedded scripts and HTML stuff\n");
1279
1280                 #check for HTML doctype
1281                 if (eregi("<!DOCTYPE *X?HTML",$chunk)) return true;
1282
1283                 /**
1284                 * Internet Explorer for Windows performs some really stupid file type
1285                 * autodetection which can cause it to interpret valid image files as HTML
1286                 * and potentially execute JavaScript, creating a cross-site scripting
1287                 * attack vectors.
1288                 *
1289                 * Apple's Safari browser also performs some unsafe file type autodetection
1290                 * which can cause legitimate files to be interpreted as HTML if the
1291                 * web server is not correctly configured to send the right content-type
1292                 * (or if you're really uploading plain text and octet streams!)
1293                 *
1294                 * Returns true if IE is likely to mistake the given file for HTML.
1295                 * Also returns true if Safari would mistake the given file for HTML
1296                 * when served with a generic content-type.
1297                 */
1298
1299                 $tags = array(
1300                         '<body',
1301                         '<head',
1302                         '<html',   #also in safari
1303                         '<img',
1304                         '<pre',
1305                         '<script', #also in safari
1306                         '<table'
1307                         );
1308                 if( ! $wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
1309                         $tags[] = '<title';
1310                 }
1311
1312                 foreach( $tags as $tag ) {
1313                         if( false !== strpos( $chunk, $tag ) ) {
1314                                 return true;
1315                         }
1316                 }
1317
1318                 /*
1319                 * look for javascript
1320                 */
1321
1322                 #resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1323                 $chunk = Sanitizer::decodeCharReferences( $chunk );
1324
1325                 #look for script-types
1326                 if (preg_match('!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim',$chunk)) return true;
1327
1328                 #look for html-style script-urls
1329                 if (preg_match('!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1330
1331                 #look for css-style script-urls
1332                 if (preg_match('!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1333
1334                 wfDebug("SpecialUpload::detectScript: no scripts found\n");
1335                 return false;
1336         }
1337
1338         /**
1339          * Generic wrapper function for a virus scanner program.
1340          * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
1341          * $wgAntivirusRequired may be used to deny upload if the scan fails.
1342          *
1343          * @param string $file Pathname to the temporary upload file
1344          * @return mixed false if not virus is found, NULL if the scan fails or is disabled,
1345          *         or a string containing feedback from the virus scanner if a virus was found.
1346          *         If textual feedback is missing but a virus was found, this function returns true.
1347          */
1348         function detectVirus($file) {
1349                 global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
1350
1351                 if ( !$wgAntivirus ) {
1352                         wfDebug( __METHOD__.": virus scanner disabled\n");
1353                         return NULL;
1354                 }
1355
1356                 if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1357                         wfDebug( __METHOD__.": unknown virus scanner: $wgAntivirus\n" );
1358                         # @TODO: localise
1359                         $wgOut->addHTML( "<div class='error'>Bad configuration: unknown virus scanner: <i>$wgAntivirus</i></div>\n" );
1360                         return "unknown antivirus: $wgAntivirus";
1361                 }
1362
1363                 # look up scanner configuration
1364                 $command = $wgAntivirusSetup[$wgAntivirus]["command"];
1365                 $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]["codemap"];
1366                 $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]["messagepattern"] ) ?
1367                         $wgAntivirusSetup[$wgAntivirus]["messagepattern"] : null;
1368
1369                 if ( strpos( $command,"%f" ) === false ) {
1370                         # simple pattern: append file to scan
1371                         $command .= " " . wfEscapeShellArg( $file );
1372                 } else {
1373                         # complex pattern: replace "%f" with file to scan
1374                         $command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
1375                 }
1376
1377                 wfDebug( __METHOD__.": running virus scan: $command \n" );
1378
1379                 # execute virus scanner
1380                 $exitCode = false;
1381
1382                 #NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1383                 #      that does not seem to be worth the pain.
1384                 #      Ask me (Duesentrieb) about it if it's ever needed.
1385                 $output = array();
1386                 if ( wfIsWindows() ) {
1387                         exec( "$command", $output, $exitCode );
1388                 } else {
1389                         exec( "$command 2>&1", $output, $exitCode );
1390                 }
1391
1392                 # map exit code to AV_xxx constants.
1393                 $mappedCode = $exitCode;
1394                 if ( $exitCodeMap ) {
1395                         if ( isset( $exitCodeMap[$exitCode] ) ) {
1396                                 $mappedCode = $exitCodeMap[$exitCode];
1397                         } elseif ( isset( $exitCodeMap["*"] ) ) {
1398                                 $mappedCode = $exitCodeMap["*"];
1399                         }
1400                 }
1401
1402                 if ( $mappedCode === AV_SCAN_FAILED ) {
1403                         # scan failed (code was mapped to false by $exitCodeMap)
1404                         wfDebug( __METHOD__.": failed to scan $file (code $exitCode).\n" );
1405
1406                         if ( $wgAntivirusRequired ) {
1407                                 return "scan failed (code $exitCode)";
1408                         } else {
1409                                 return NULL;
1410                         }
1411                 } else if ( $mappedCode === AV_SCAN_ABORTED ) {
1412                         # scan failed because filetype is unknown (probably imune)
1413                         wfDebug( __METHOD__.": unsupported file type $file (code $exitCode).\n" );
1414                         return NULL;
1415                 } else if ( $mappedCode === AV_NO_VIRUS ) {
1416                         # no virus found
1417                         wfDebug( __METHOD__.": file passed virus scan.\n" );
1418                         return false;
1419                 } else {
1420                         $output = join( "\n", $output );
1421                         $output = trim( $output );
1422
1423                         if ( !$output ) {
1424                                 $output = true; #if there's no output, return true
1425                         } elseif ( $msgPattern ) {
1426                                 $groups = array();
1427                                 if ( preg_match( $msgPattern, $output, $groups ) ) {
1428                                         if ( $groups[1] ) {
1429                                                 $output = $groups[1];
1430                                         }
1431                                 }
1432                         }
1433
1434                         wfDebug( __METHOD__.": FOUND VIRUS! scanner feedback: $output" );
1435                         return $output;
1436                 }
1437         }
1438
1439         /**
1440          * Check if the temporary file is MacBinary-encoded, as some uploads
1441          * from Internet Explorer on Mac OS Classic and Mac OS X will be.
1442          * If so, the data fork will be extracted to a second temporary file,
1443          * which will then be checked for validity and either kept or discarded.
1444          *
1445          * @access private
1446          */
1447         function checkMacBinary() {
1448                 $macbin = new MacBinary( $this->mTempPath );
1449                 if( $macbin->isValid() ) {
1450                         $dataFile = tempnam( wfTempDir(), "WikiMacBinary" );
1451                         $dataHandle = fopen( $dataFile, 'wb' );
1452
1453                         wfDebug( "SpecialUpload::checkMacBinary: Extracting MacBinary data fork to $dataFile\n" );
1454                         $macbin->extractData( $dataHandle );
1455
1456                         $this->mTempPath = $dataFile;
1457                         $this->mFileSize = $macbin->dataForkLength();
1458
1459                         // We'll have to manually remove the new file if it's not kept.
1460                         $this->mRemoveTempFile = true;
1461                 }
1462                 $macbin->close();
1463         }
1464
1465         /**
1466          * If we've modified the upload file we need to manually remove it
1467          * on exit to clean up.
1468          * @access private
1469          */
1470         function cleanupTempFile() {
1471                 if ( $this->mRemoveTempFile && file_exists( $this->mTempPath ) ) {
1472                         wfDebug( "SpecialUpload::cleanupTempFile: Removing temporary file {$this->mTempPath}\n" );
1473                         unlink( $this->mTempPath );
1474                 }
1475         }
1476
1477         /**
1478          * Check if there's an overwrite conflict and, if so, if restrictions
1479          * forbid this user from performing the upload.
1480          *
1481          * @return mixed true on success, WikiError on failure
1482          * @access private
1483          */
1484         function checkOverwrite( $name ) {
1485                 $img = wfFindFile( $name );
1486
1487                 $error = '';
1488                 if( $img ) {
1489                         global $wgUser, $wgOut;
1490                         if( $img->isLocal() ) {
1491                                 if( !self::userCanReUpload( $wgUser, $img->name ) ) {
1492                                         $error = 'fileexists-forbidden';
1493                                 }
1494                         } else {
1495                                 if( !$wgUser->isAllowed( 'reupload' ) ||
1496                                     !$wgUser->isAllowed( 'reupload-shared' ) ) {
1497                                         $error = "fileexists-shared-forbidden";
1498                                 }
1499                         }
1500                 }
1501
1502                 if( $error ) {
1503                         $errorText = wfMsg( $error, wfEscapeWikiText( $img->getName() ) );
1504                         return $errorText;
1505                 }
1506
1507                 // Rockin', go ahead and upload
1508                 return true;
1509         }
1510
1511          /**
1512          * Check if a user is the last uploader
1513          *
1514          * @param User $user
1515          * @param string $img, image name
1516          * @return bool
1517          */
1518         public static function userCanReUpload( User $user, $img ) {
1519                 if( $user->isAllowed( 'reupload' ) )
1520                         return true; // non-conditional
1521                 if( !$user->isAllowed( 'reupload-own' ) )
1522                         return false;
1523
1524                 $dbr = wfGetDB( DB_SLAVE );
1525                 $row = $dbr->selectRow('image',
1526                 /* SELECT */ 'img_user',
1527                 /* WHERE */ array( 'img_name' => $img )
1528                 );
1529                 if ( !$row )
1530                         return false;
1531
1532                 return $user->getID() == $row->img_user;
1533         }
1534
1535         /**
1536          * Display an error with a wikitext description
1537          */
1538         function showError( $description ) {
1539                 global $wgOut;
1540                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
1541                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1542                 $wgOut->setArticleRelated( false );
1543                 $wgOut->enableClientCache( false );
1544                 $wgOut->addWikiText( $description );
1545         }
1546
1547         /**
1548          * Get the initial image page text based on a comment and optional file status information
1549          */
1550         static function getInitialPageText( $comment, $license, $copyStatus, $source ) {
1551                 global $wgUseCopyrightUpload;
1552                 if ( $wgUseCopyrightUpload ) {
1553                         if ( $license != '' ) {
1554                                 $licensetxt = '== ' . wfMsgForContent( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1555                         }
1556                         $pageText = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n" .
1557                           '== ' . wfMsgForContent ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
1558                           "$licensetxt" .
1559                           '== ' . wfMsgForContent ( 'filesource' ) . " ==\n" . $source ;
1560                 } else {
1561                         if ( $license != '' ) {
1562                                 $filedesc = $comment == '' ? '' : '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n";
1563                                  $pageText = $filedesc .
1564                                          '== ' . wfMsgForContent ( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1565                         } else {
1566                                 $pageText = $comment;
1567                         }
1568                 }
1569                 return $pageText;
1570         }
1571
1572         /**
1573          * If there are rows in the deletion log for this file, show them,
1574          * along with a nice little note for the user
1575          *
1576          * @param OutputPage $out
1577          * @param string filename
1578          */
1579         private function showDeletionLog( $out, $filename ) {
1580                 $reader = new LogReader(
1581                         new FauxRequest(
1582                                 array(
1583                                         'page' => $filename,
1584                                         'type' => 'delete',
1585                                         )
1586                         )
1587                 );
1588                 if( $reader->hasRows() ) {
1589                         $out->addHtml( '<div id="mw-upload-deleted-warn">' );
1590                         $out->addWikiText( wfMsg( 'upload-wasdeleted' ) );
1591                         $viewer = new LogViewer( $reader );
1592                         $viewer->showList( $out );
1593                         $out->addHtml( '</div>' );
1594                 }
1595         }
1596 }