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(
 325                                         wfMsgExt( 'filetype-banned-type',
 326                                                 array( 'parseinline' ),
 327                                                 htmlspecialchars( $finalExt ),
 328                                                 implode(
 329                                                         wfMsgExt( 'comma-separator', array( 'escapenoentities' ) ),
 330                                                         $wgFileExtensions
 331                                                 )
 332                                         )
 333                                 );
 334                                 break;
 335
 336                         case self::VERIFICATION_ERROR:
 337                                 $veri = $details['veri'];
 338                                 $this->uploadError( $veri->toString() );
 339                                 break;
 340
 341                         case self::UPLOAD_VERIFICATION_ERROR:
 342                                 $error = $details['error'];
 343                                 $this->uploadError( $error );
 344                                 break;
 345
 346                         case self::UPLOAD_WARNING:
 347                                 $warning = $details['warning'];
 348                                 $this->uploadWarning( $warning );
 349                                 break;
 350
 351                         case self::INTERNAL_ERROR:
 352                                 $internal = $details['internal'];
 353                                 $this->showError( $internal );
 354                                 break;
 355
 356                         default:
 357                                 throw new MWException( __METHOD__ . ": Unknown value `{$value}`" );
 358                 }
 359         }
 360
 361         /**
 362          * Really do the upload
 363          * Checks are made in SpecialUpload::execute()
 364          *
 365          * @param array $resultDetails contains result-specific dict of additional values
 366          *
 367          * @access private
 368          */
 369         function internalProcessUpload( &$resultDetails ) {
 370                 global $wgUser;
 371
 372                 if( !wfRunHooks( 'UploadForm:BeforeProcessing', array( &$this ) ) )
 373                 {
 374                         wfDebug( "Hook 'UploadForm:BeforeProcessing' broke processing the file." );
 375                         return self::BEFORE_PROCESSING;
 376                 }
 377
 378                 /* Check for PHP error if any, requires php 4.2 or newer */
 379                 if( $this->mCurlError == 1/*UPLOAD_ERR_INI_SIZE*/ ) {
 380                         return self::LARGE_FILE_SERVER;
 381                 }
 382
 383                 /**
 384                  * If there was no filename or a zero size given, give up quick.
 385                  */
 386                 if( trim( $this->mSrcName ) == '' || empty( $this->mFileSize ) ) {
 387                         return self::EMPTY_FILE;
 388                 }
 389
 390                 # Chop off any directories in the given filename
 391                 if( $this->mDesiredDestName ) {
 392                         $basename = $this->mDesiredDestName;
 393                 } else {
 394                         $basename = $this->mSrcName;
 395                 }
 396                 $filtered = wfBaseName( $basename );
 397
 398                 /**
 399                  * We'll want to blacklist against *any* 'extension', and use
 400                  * only the final one for the whitelist.
 401                  */
 402                 list( $partname, $ext ) = $this->splitExtensions( $filtered );
 403
 404                 if( count( $ext ) ) {
 405                         $finalExt = $ext[count( $ext ) - 1];
 406                 } else {
 407                         $finalExt = '';
 408                 }
 409
 410                 # If there was more than one "extension", reassemble the base
 411                 # filename to prevent bogus complaints about length
 412                 if( count( $ext ) > 1 ) {
 413                         for( $i = 0; $i < count( $ext ) - 1; $i++ )
 414                                 $partname .= '.' . $ext[$i];
 415                 }
 416
 417                 if( strlen( $partname ) < 1 ) {
 418                         return self::MIN_LENGHT_PARTNAME;
 419                 }
 420
 421                 /**
 422                  * Filter out illegal characters, and try to make a legible name
 423                  * out of it. We'll strip some silently that Title would die on.
 424                  */
 425                 $filtered = preg_replace ( "/[^".Title::legalChars()."]|:/", '-', $filtered );
 426                 $nt = Title::makeTitleSafe( NS_IMAGE, $filtered );
 427                 if( is_null( $nt ) ) {
 428                         $resultDetails = array( 'filtered' => $filtered );
 429                         return self::ILLEGAL_FILENAME;
 430                 }
 431                 $this->mLocalFile = wfLocalFile( $nt );
 432                 $this->mDestName = $this->mLocalFile->getName();
 433
 434                 /**
 435                  * If the image is protected, non-sysop users won't be able
 436                  * to modify it by uploading a new revision.
 437                  */
 438                 if( !$nt->userCan( 'edit' ) || !$nt->userCan( 'create' ) ) {
 439                         return self::PROTECTED_PAGE;
 440                 }
 441
 442                 /**
 443                  * In some cases we may forbid overwriting of existing files.
 444                  */
 445                 $overwrite = $this->checkOverwrite( $this->mDestName );
 446                 if( $overwrite !== true ) {
 447                         $resultDetails = array( 'overwrite' => $overwrite );
 448                         return self::OVERWRITE_EXISTING_FILE;
 449                 }
 450
 451                 /* Don't allow users to override the blacklist (check file extension) */
 452                 global $wgStrictFileExtensions;
 453                 global $wgFileExtensions, $wgFileBlacklist;
 454                 if ($finalExt == '') {
 455                         return self::FILETYPE_MISSING;
 456                 } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) ||
 457                                 ($wgStrictFileExtensions && !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) ) {
 458                         $resultDetails = array( 'finalExt' => $finalExt );
 459                         return self::FILETYPE_BADTYPE;
 460                 }
 461
 462                 /**
 463                  * Look at the contents of the file; if we can recognize the
 464                  * type but it's corrupt or data of the wrong type, we should
 465                  * probably not accept it.
 466                  */
 467                 if( !$this->mStashed ) {
 468                         $this->mFileProps = File::getPropsFromPath( $this->mTempPath, $finalExt );
 469                         $this->checkMacBinary();
 470                         $veri = $this->verify( $this->mTempPath, $finalExt );
 471
 472                         if( $veri !== true ) { //it's a wiki error...
 473                                 $resultDetails = array( 'veri' => $veri );
 474                                 return self::VERIFICATION_ERROR;
 475                         }
 476
 477                         /**
 478                          * Provide an opportunity for extensions to add further checks
 479                          */
 480                         $error = '';
 481                         if( !wfRunHooks( 'UploadVerification',
 482                                         array( $this->mDestName, $this->mTempPath, &$error ) ) ) {
 483                                 $resultDetails = array( 'error' => $error );
 484                                 return self::UPLOAD_VERIFICATION_ERROR;
 485                         }
 486                 }
 487
 488
 489                 /**
 490                  * Check for non-fatal conditions
 491                  */
 492                 if ( ! $this->mIgnoreWarning ) {
 493                         $warning = '';
 494
 495                         global $wgCapitalLinks;
 496                         if( $wgCapitalLinks ) {
 497                                 $filtered = ucfirst( $filtered );
 498                         }
 499                         if( $basename != $filtered ) {
 500                                 $warning .=  '<li>'.wfMsgHtml( 'badfilename', htmlspecialchars( $this->mDestName ) ).'</li>';
 501                         }
 502
 503                         global $wgCheckFileExtensions;
 504                         if ( $wgCheckFileExtensions ) {
 505                                 if ( !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) {
 506                                         $warning .= '<li>' .
 507                                         wfMsgExt( 'filetype-unwanted-type',
 508                                                 array( 'parseinline' ),
 509                                                 htmlspecialchars( $finalExt ),
 510                                                 implode(
 511                                                         wfMsgExt( 'comma-separator', array( 'escapenoentities' ) ),
 512                                                         $wgFileExtensions
 513                                                 )
 514                                         ) . '</li>';
 515                                 }
 516                         }
 517
 518                         global $wgUploadSizeWarning;
 519                         if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) {
 520                                 $skin = $wgUser->getSkin();
 521                                 $wsize = $skin->formatSize( $wgUploadSizeWarning );
 522                                 $asize = $skin->formatSize( $this->mFileSize );
 523                                 $warning .= '<li>' . wfMsgHtml( 'large-file', $wsize, $asize ) . '</li>';
 524                         }
 525                         if ( $this->mFileSize == 0 ) {
 526                                 $warning .= '<li>'.wfMsgHtml( 'emptyfile' ).'</li>';
 527                         }
 528
 529                         if ( !$this->mDestWarningAck ) {
 530                                 $warning .= self::getExistsWarning( $this->mLocalFile );
 531                         }
 532                         if( $warning != '' ) {
 533                                 /**
 534                                  * Stash the file in a temporary location; the user can choose
 535                                  * to let it through and we'll complete the upload then.
 536                                  */
 537                                 $resultDetails = array( 'warning' => $warning );
 538                                 return self::UPLOAD_WARNING;
 539                         }
 540                 }
 541
 542                 /**
 543                  * Try actually saving the thing...
 544                  * It will show an error form on failure.
 545                  */
 546                 $pageText = self::getInitialPageText( $this->mComment, $this->mLicense,
 547                         $this->mCopyrightStatus, $this->mCopyrightSource );
 548
 549                 $status = $this->mLocalFile->upload( $this->mTempPath, $this->mComment, $pageText,
 550                         File::DELETE_SOURCE, $this->mFileProps );
 551                 if ( !$status->isGood() ) {
 552                         $resultDetails = array( 'internal' => $status->getWikiText() );
 553                         return self::INTERNAL_ERROR;
 554                 } else {
 555                         if ( $this->mWatchthis ) {
 556                                 global $wgUser;
 557                                 $wgUser->addWatch( $this->mLocalFile->getTitle() );
 558                         }
 559                         // Success, redirect to description page
 560                         $img = null; // @todo: added to avoid passing a ref to null - should this be defined somewhere?
 561                         wfRunHooks( 'UploadComplete', array( &$this ) );
 562                         return self::SUCCESS;
 563                 }
 564         }
 565
 566         /**
 567          * Do existence checks on a file and produce a warning
 568          * This check is static and can be done pre-upload via AJAX
 569          * Returns an HTML fragment consisting of one or more LI elements if there is a warning
 570          * Returns an empty string if there is no warning
 571          */
 572         static function getExistsWarning( $file ) {
 573                 global $wgUser;
 574                 // Check for uppercase extension. We allow these filenames but check if an image
 575                 // with lowercase extension exists already
 576                 $warning = '';
 577
 578                 if( strpos( $file->getName(), '.' ) == false ) {
 579                         $partname = $file->getName();
 580                         $rawExtension = '';
 581                 } else {
 582                         list( $partname, $rawExtension ) = explode( '.', $file->getName(), 2 );
 583                 }
 584                 $sk = $wgUser->getSkin();
 585
 586                 if ( $rawExtension != $file->getExtension() ) {
 587                         // We're not using the normalized form of the extension.
 588                         // Normal form is lowercase, using most common of alternate
 589                         // extensions (eg 'jpg' rather than 'JPEG').
 590                         //
 591                         // Check for another file using the normalized form...
 592                         $nt_lc = Title::newFromText( $partname . '.' . $file->getExtension() );
 593                         $file_lc = wfLocalFile( $nt_lc );
 594                 } else {
 595                         $file_lc = false;
 596                 }
 597
 598                 if( $file->exists() ) {
 599                         $dlink = $sk->makeKnownLinkObj( $file->getTitle() );
 600                         if ( $file->allowInlineDisplay() ) {
 601                                 $dlink2 = $sk->makeImageLinkObj( $file->getTitle(), wfMsgExt( 'fileexists-thumb', 'parseinline', $dlink ),
 602                                         $file->getName(), 'right', array(), false, true );
 603                         } elseif ( !$file->allowInlineDisplay() && $file->isSafeFile() ) {
 604                                 $icon = $file->iconThumb();
 605                                 $dlink2 = '<div style="float:right" id="mw-media-icon">' .
 606                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 607                         } else {
 608                                 $dlink2 = '';
 609                         }
 610
 611                         $warning .= '<li>' . wfMsgExt( 'fileexists', array(), $dlink ) . '</li>' . $dlink2;
 612
 613                 } elseif( $file->getTitle()->getArticleID() ) {
 614                         $lnk = $sk->makeKnownLinkObj( $file->getTitle(), '', 'redirect=no' );
 615                         $warning .= '<li>' . wfMsgExt( 'filepageexists', array(), $lnk ) . '</li>';
 616                 } elseif ( $file_lc && $file_lc->exists() ) {
 617                         # Check if image with lowercase extension exists.
 618                         # It's not forbidden but in 99% it makes no sense to upload the same filename with uppercase extension
 619                         $dlink = $sk->makeKnownLinkObj( $nt_lc );
 620                         if ( $file_lc->allowInlineDisplay() ) {
 621                                 $dlink2 = $sk->makeImageLinkObj( $nt_lc, wfMsgExt( 'fileexists-thumb', 'parseinline', $dlink ),
 622                                         $nt_lc->getText(), 'right', array(), false, true );
 623                         } elseif ( !$file_lc->allowInlineDisplay() && $file_lc->isSafeFile() ) {
 624                                 $icon = $file_lc->iconThumb();
 625                                 $dlink2 = '<div style="float:right" id="mw-media-icon">' .
 626                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 627                         } else {
 628                                 $dlink2 = '';
 629                         }
 630
 631                         $warning .= '<li>' . wfMsgExt( 'fileexists-extension', 'parsemag', $file->getName(), $dlink ) . '</li>' . $dlink2;
 632
 633                 } elseif ( ( substr( $partname , 3, 3 ) == 'px-' || substr( $partname , 2, 3 ) == 'px-' )
 634                         && ereg( "[0-9]{2}" , substr( $partname , 0, 2) ) )
 635                 {
 636                         # Check for filenames like 50px- or 180px-, these are mostly thumbnails
 637                         $nt_thb = Title::newFromText( substr( $partname , strpos( $partname , '-' ) +1 ) . '.' . $rawExtension );
 638                         $file_thb = wfLocalFile( $nt_thb );
 639                         if ($file_thb->exists() ) {
 640                                 # Check if an image without leading '180px-' (or similiar) exists
 641                                 $dlink = $sk->makeKnownLinkObj( $nt_thb);
 642                                 if ( $file_thb->allowInlineDisplay() ) {
 643                                         $dlink2 = $sk->makeImageLinkObj( $nt_thb,
 644                                                 wfMsgExt( 'fileexists-thumb', 'parseinline', $dlink ),
 645                                                 $nt_thb->getText(), 'right', array(), false, true );
 646                                 } elseif ( !$file_thb->allowInlineDisplay() && $file_thb->isSafeFile() ) {
 647                                         $icon = $file_thb->iconThumb();
 648                                         $dlink2 = '<div style="float:right" id="mw-media-icon">' .
 649                                                 $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' .
 650                                                 $dlink . '</div>';
 651                                 } else {
 652                                         $dlink2 = '';
 653                                 }
 654
 655                                 $warning .= '<li>' . wfMsgExt( 'fileexists-thumbnail-yes', 'parsemag', $dlink ) .
 656                                         '</li>' . $dlink2;
 657                         } else {
 658                                 # Image w/o '180px-' does not exists, but we do not like these filenames
 659                                 $warning .= '<li>' . wfMsgExt( 'file-thumbnail-no', 'parseinline' ,
 660                                         substr( $partname , 0, strpos( $partname , '-' ) +1 ) ) . '</li>';
 661                         }
 662                 }
 663
 664                 $filenamePrefixBlacklist = self::getFilenamePrefixBlacklist();
 665                 # Do the match
 666                 foreach( $filenamePrefixBlacklist as $prefix ) {
 667                         if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
 668                                 $warning .= '<li>' . wfMsgExt( 'filename-bad-prefix', 'parseinline', $prefix ) . '</li>';
 669                                 break;
 670                         }
 671                 }
 672
 673                 if ( $file->wasDeleted() && !$file->exists() ) {
 674                         # If the file existed before and was deleted, warn the user of this
 675                         # Don't bother doing so if the file exists now, however
 676                         $ltitle = SpecialPage::getTitleFor( 'Log' );
 677                         $llink = $sk->makeKnownLinkObj( $ltitle, wfMsgHtml( 'deletionlog' ),
 678                                 'type=delete&page=' . $file->getTitle()->getPrefixedUrl() );
 679                         $warning .= '<li>' . wfMsgWikiHtml( 'filewasdeleted', $llink ) . '</li>';
 680                 }
 681                 return $warning;
 682         }
 683
 684         /**
 685          * Get a list of warnings
 686          *
 687          * @param string local filename, e.g. 'file exists', 'non-descriptive filename'
 688          * @return array list of warning messages
 689          */
 690         static function ajaxGetExistsWarning( $filename ) {
 691                 $file = wfFindFile( $filename );
 692                 if( !$file ) {
 693                         // Force local file so we have an object to do further checks against
 694                         // if there isn't an exact match...
 695                         $file = wfLocalFile( $filename );
 696                 }
 697                 $s = '&nbsp;';
 698                 if ( $file ) {
 699                         $warning = self::getExistsWarning( $file );
 700                         if ( $warning !== '' ) {
 701                                 $s = "<ul>$warning</ul>";
 702                         }
 703                 }
 704                 return $s;
 705         }
 706
 707         /**
 708          * Render a preview of a given license for the AJAX preview on upload
 709          *
 710          * @param string $license
 711          * @return string
 712          */
 713         public static function ajaxGetLicensePreview( $license ) {
 714                 global $wgParser, $wgUser;
 715                 $text = '{{' . $license . '}}';
 716                 $title = Title::makeTitle( NS_IMAGE, 'Sample.jpg' );
 717                 $options = ParserOptions::newFromUser( $wgUser );
 718
 719                 // Expand subst: first, then live templates...
 720                 $text = $wgParser->preSaveTransform( $text, $title, $wgUser, $options );
 721                 $output = $wgParser->parse( $text, $title, $options );
 722
 723                 return $output->getText();
 724         }
 725
 726         /**
 727          * Get a list of blacklisted filename prefixes from [[MediaWiki:filename-prefix-blacklist]]
 728          *
 729          * @return array list of prefixes
 730          */
 731         public static function getFilenamePrefixBlacklist() {
 732                 $blacklist = array();
 733                 $message = wfMsgForContent( 'filename-prefix-blacklist' );
 734                 if( $message && !( wfEmptyMsg( 'filename-prefix-blacklist', $message ) || $message == '-' ) ) {
 735                         $lines = explode( "\n", $message );
 736                         foreach( $lines as $line ) {
 737                                 // Remove comment lines
 738                                 $comment = substr( trim( $line ), 0, 1 );
 739                                 if ( $comment == '#' || $comment == '' ) {
 740                                         continue;
 741                                 }
 742                                 // Remove additional comments after a prefix
 743                                 $comment = strpos( $line, '#' );
 744                                 if ( $comment > 0 ) {
 745                                         $line = substr( $line, 0, $comment-1 );
 746                                 }
 747                                 $blacklist[] = trim( $line );
 748                         }
 749                 }
 750                 return $blacklist;
 751         }
 752
 753         /**
 754          * Stash a file in a temporary directory for later processing
 755          * after the user has confirmed it.
 756          *
 757          * If the user doesn't explicitly cancel or accept, these files
 758          * can accumulate in the temp directory.
 759          *
 760          * @param string $saveName - the destination filename
 761          * @param string $tempName - the source temporary file to save
 762          * @return string - full path the stashed file, or false on failure
 763          * @access private
 764          */
 765         function saveTempUploadedFile( $saveName, $tempName ) {
 766                 global $wgOut;
 767                 $repo = RepoGroup::singleton()->getLocalRepo();
 768                 $status = $repo->storeTemp( $saveName, $tempName );
 769                 if ( !$status->isGood() ) {
 770                         $this->showError( $status->getWikiText() );
 771                         return false;
 772                 } else {
 773                         return $status->value;
 774                 }
 775         }
 776
 777         /**
 778          * Stash a file in a temporary directory for later processing,
 779          * and save the necessary descriptive info into the session.
 780          * Returns a key value which will be passed through a form
 781          * to pick up the path info on a later invocation.
 782          *
 783          * @return int
 784          * @access private
 785          */
 786         function stashSession() {
 787                 $stash = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath );
 788
 789                 if( !$stash ) {
 790                         # Couldn't save the file.
 791                         return false;
 792                 }
 793
 794                 $key = mt_rand( 0, 0x7fffffff );
 795                 $_SESSION['wsUploadData'][$key] = array(
 796                         'mTempPath'       => $stash,
 797                         'mFileSize'       => $this->mFileSize,
 798                         'mSrcName'        => $this->mSrcName,
 799                         'mFileProps'      => $this->mFileProps,
 800                         'version'         => self::SESSION_VERSION,
 801                 );
 802                 return $key;
 803         }
 804
 805         /**
 806          * Remove a temporarily kept file stashed by saveTempUploadedFile().
 807          * @access private
 808          * @return success
 809          */
 810         function unsaveUploadedFile() {
 811                 global $wgOut;
 812                 $repo = RepoGroup::singleton()->getLocalRepo();
 813                 $success = $repo->freeTemp( $this->mTempPath );
 814                 if ( ! $success ) {
 815                         $wgOut->showFileDeleteError( $this->mTempPath );
 816                         return false;
 817                 } else {
 818                         return true;
 819                 }
 820         }
 821
 822         /* -------------------------------------------------------------- */
 823
 824         /**
 825          * @param string $error as HTML
 826          * @access private
 827          */
 828         function uploadError( $error ) {
 829                 global $wgOut;
 830                 $wgOut->addHTML( "<h2>" . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 831                 $wgOut->addHTML( "<span class='error'>{$error}</span>\n" );
 832         }
 833
 834         /**
 835          * There's something wrong with this file, not enough to reject it
 836          * totally but we require manual intervention to save it for real.
 837          * Stash it away, then present a form asking to confirm or cancel.
 838          *
 839          * @param string $warning as HTML
 840          * @access private
 841          */
 842         function uploadWarning( $warning ) {
 843                 global $wgOut, $wgContLang;
 844                 global $wgUseCopyrightUpload;
 845
 846                 $this->mSessionKey = $this->stashSession();
 847                 if( !$this->mSessionKey ) {
 848                         # Couldn't save file; an error has been displayed so let's go.
 849                         return;
 850                 }
 851
 852                 $wgOut->addHTML( "<h2>" . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 853                 $wgOut->addHTML( "<ul class='warning'>{$warning}</ul><br />\n" );
 854
 855                 $save = wfMsgHtml( 'savefile' );
 856                 $reupload = wfMsgHtml( 'reupload' );
 857                 $iw = wfMsgWikiHtml( 'ignorewarning' );
 858                 $reup = wfMsgWikiHtml( 'reuploaddesc' );
 859                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
 860                 $action = $titleObj->escapeLocalURL( 'action=submit' );
 861                 $align1 = $wgContLang->isRTL() ? 'left' : 'right';
 862                 $align2 = $wgContLang->isRTL() ? 'right' : 'left';
 863
 864                 if ( $wgUseCopyrightUpload )
 865                 {
 866                         $copyright =  "
 867         <input type='hidden' name='wpUploadCopyStatus' value=\"" . htmlspecialchars( $this->mCopyrightStatus ) . "\" />
 868         <input type='hidden' name='wpUploadSource' value=\"" . htmlspecialchars( $this->mCopyrightSource ) . "\" />
 869         ";
 870                 } else {
 871                         $copyright = "";
 872                 }
 873
 874                 $wgOut->addHTML( "
 875         <form id='uploadwarning' method='post' enctype='multipart/form-data' action='$action'>
 876                 <input type='hidden' name='wpIgnoreWarning' value='1' />
 877                 <input type='hidden' name='wpSessionKey' value=\"" . htmlspecialchars( $this->mSessionKey ) . "\" />
 878                 <input type='hidden' name='wpUploadDescription' value=\"" . htmlspecialchars( $this->mComment ) . "\" />
 879                 <input type='hidden' name='wpLicense' value=\"" . htmlspecialchars( $this->mLicense ) . "\" />
 880                 <input type='hidden' name='wpDestFile' value=\"" . htmlspecialchars( $this->mDesiredDestName ) . "\" />
 881                 <input type='hidden' name='wpWatchthis' value=\"" . htmlspecialchars( intval( $this->mWatchthis ) ) . "\" />
 882         {$copyright}
 883         <table border='0'>
 884                 <tr>
 885                         <tr>
 886                                 <td align='$align1'>
 887                                         <input tabindex='2' type='submit' name='wpUpload' value=\"$save\" />
 888                                 </td>
 889                                 <td align='$align2'>$iw</td>
 890                         </tr>
 891                         <tr>
 892                                 <td align='$align1'>
 893                                         <input tabindex='2' type='submit' name='wpReUpload' value=\"{$reupload}\" />
 894                                 </td>
 895                                 <td align='$align2'>$reup</td>
 896                         </tr>
 897                 </tr>
 898         </table></form>\n" );
 899         }
 900
 901         /**
 902          * Displays the main upload form, optionally with a highlighted
 903          * error message up at the top.
 904          *
 905          * @param string $msg as HTML
 906          * @access private
 907          */
 908         function mainUploadForm( $msg='' ) {
 909                 global $wgOut, $wgUser, $wgContLang;
 910                 global $wgUseCopyrightUpload, $wgUseAjax, $wgAjaxUploadDestCheck, $wgAjaxLicensePreview;
 911                 global $wgRequest, $wgAllowCopyUploads;
 912                 global $wgStylePath, $wgStyleVersion;
 913
 914                 $useAjaxDestCheck = $wgUseAjax && $wgAjaxUploadDestCheck;
 915                 $useAjaxLicensePreview = $wgUseAjax && $wgAjaxLicensePreview;
 916
 917                 $adc = wfBoolToStr( $useAjaxDestCheck );
 918                 $alp = wfBoolToStr( $useAjaxLicensePreview );
 919
 920                 $wgOut->addScript( "<script type=\"text/javascript\">
 921 wgAjaxUploadDestCheck = {$adc};
 922 wgAjaxLicensePreview = {$alp};
 923 </script>
 924 <script type=\"text/javascript\" src=\"{$wgStylePath}/common/upload.js?{$wgStyleVersion}\"></script>
 925                 " );
 926
 927                 if( !wfRunHooks( 'UploadForm:initial', array( &$this ) ) )
 928                 {
 929                         wfDebug( "Hook 'UploadForm:initial' broke output of the upload form" );
 930                         return false;
 931                 }
 932
 933                 if( $this->mDesiredDestName ) {
 934                         $title = Title::makeTitleSafe( NS_IMAGE, $this->mDesiredDestName );
 935                         // Show a subtitle link to deleted revisions (to sysops et al only)
 936                         if( $title instanceof Title && ( $count = $title->isDeleted() ) > 0 && $wgUser->isAllowed( 'deletedhistory' ) ) {
 937                                 $link = wfMsgExt(
 938                                         $wgUser->isAllowed( 'delete' ) ? 'thisisdeleted' : 'viewdeleted',
 939                                         array( 'parse', 'replaceafter' ),
 940                                         $wgUser->getSkin()->makeKnownLinkObj(
 941                                                 SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedText() ),
 942                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $count )
 943                                         )
 944                                 );
 945                                 $wgOut->addHtml( "<div id=\"contentSub2\">{$link}</div>" );
 946                         }
 947
 948                         // Show the relevant lines from deletion log (for still deleted files only)
 949                         if( $title instanceof Title && $title->isDeleted() > 0 && !$title->exists() ) {
 950                                 $this->showDeletionLog( $wgOut, $title->getPrefixedText() );
 951                         }
 952                 }
 953
 954                 $cols = intval($wgUser->getOption( 'cols' ));
 955
 956                 if( $wgUser->getOption( 'editwidth' ) ) {
 957                         $width = " style=\"width:100%\"";
 958                 } else {
 959                         $width = '';
 960                 }
 961
 962                 if ( '' != $msg ) {
 963                         $sub = wfMsgHtml( 'uploaderror' );
 964                         $wgOut->addHTML( "<h2>{$sub}</h2>\n" .
 965                           "<span class='error'>{$msg}</span>\n" );
 966                 }
 967                 $wgOut->addHTML( '<div id="uploadtext">' );
 968                 $wgOut->addWikiText( wfMsgNoTrans( 'uploadtext', $this->mDesiredDestName ) );
 969                 $wgOut->addHTML( "</div>\n" );
 970
 971                 # Print a list of allowed file extensions, if so configured.  We ignore
 972                 # MIME type here, it's incomprehensible to most people and too long.
 973                 global $wgCheckFileExtensions, $wgStrictFileExtensions,
 974                 $wgFileExtensions, $wgFileBlacklist;
 975                 if( $wgCheckFileExtensions ) {
 976                         $delim = wfMsgExt( 'comma-separator', array( 'escapenoentities' ) );
 977                         if( $wgStrictFileExtensions ) {
 978                                 # Everything not permitted is banned
 979                                 $wgOut->addHTML(
 980                                         '<div id="mw-upload-permitted">' .
 981                                         wfMsgWikiHtml( 'upload-permitted', implode( $wgFileExtensions, $delim ) ) .
 982                                         "</div>\n"
 983                                 );
 984                         } else {
 985                                 # We have to list both preferred and prohibited
 986                                 $wgOut->addHTML(
 987                                         '<div id="mw-upload-preferred">' .
 988                                         wfMsgWikiHtml( 'upload-preferred', implode( $wgFileExtensions, $delim ) ) .
 989                                         "</div>\n" .
 990                                         '<div id="mw-upload-prohibited">' .
 991                                         wfMsgWikiHtml( 'upload-prohibited', implode( $wgFileBlacklist, $delim ) ) .
 992                                         "</div>\n"
 993                                 );
 994                         }
 995                 }
 996
 997                 $sourcefilename = wfMsgHtml( 'sourcefilename' );
 998                 $destfilename = wfMsgHtml( 'destfilename' );
 999                 $summary = wfMsgExt( 'fileuploadsummary', 'parseinline' );
1000
1001                 $licenses = new Licenses();
1002                 $license = wfMsgExt( 'license', array( 'parseinline' ) );
1003                 $nolicense = wfMsgHtml( 'nolicense' );
1004                 $licenseshtml = $licenses->getHtml();
1005
1006                 $ulb = wfMsgHtml( 'uploadbtn' );
1007
1008
1009                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
1010                 $action = $titleObj->escapeLocalURL();
1011
1012                 $encDestName = htmlspecialchars( $this->mDesiredDestName );
1013
1014                 $watchChecked =
1015                         ( $wgUser->getOption( 'watchdefault' ) ||
1016                                 ( $wgUser->getOption( 'watchcreations' ) && $this->mDesiredDestName == '' ) )
1017                         ? 'checked="checked"'
1018                         : '';
1019                 $warningChecked = $this->mIgnoreWarning ? 'checked' : '';
1020
1021                 // Prepare form for upload or upload/copy
1022                 if( $wgAllowCopyUploads && $wgUser->isAllowed( 'upload_by_url' ) ) {
1023                         $filename_form =
1024                                 "<input type='radio' id='wpSourceTypeFile' name='wpSourceType' value='file' " .
1025                                    "onchange='toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\")' checked />" .
1026                                  "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1027                                    "onfocus='" .
1028                                      "toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\");" .
1029                                      "toggle_element_check(\"wpSourceTypeFile\",\"wpSourceTypeURL\")'" .
1030                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") . "size='40' />" .
1031                                 wfMsgHTML( 'upload_source_file' ) . "<br/>" .
1032                                 "<input type='radio' id='wpSourceTypeURL' name='wpSourceType' value='web' " .
1033                                   "onchange='toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\")' />" .
1034                                 "<input tabindex='1' type='text' name='wpUploadFileURL' id='wpUploadFileURL' " .
1035                                   "onfocus='" .
1036                                     "toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\");" .
1037                                     "toggle_element_check(\"wpSourceTypeURL\",\"wpSourceTypeFile\")'" .
1038                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFileURL\")' ") . "size='40' DISABLED />" .
1039                                 wfMsgHtml( 'upload_source_url' ) ;
1040                 } else {
1041                         $filename_form =
1042                                 "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1043                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") .
1044                                 "size='40' />" .
1045                                 "<input type='hidden' name='wpSourceType' value='file' />" ;
1046                 }
1047                 if ( $useAjaxDestCheck ) {
1048                         $warningRow = "<tr><td colspan='2' id='wpDestFile-warning'>&nbsp;</td></tr>";
1049                         $destOnkeyup = 'onkeyup="wgUploadWarningObj.keypress();"';
1050                 } else {
1051                         $warningRow = '';
1052                         $destOnkeyup = '';
1053                 }
1054
1055                 $encComment = htmlspecialchars( $this->mComment );
1056                 $align1 = $wgContLang->isRTL() ? 'left' : 'right';
1057                 $align2 = $wgContLang->isRTL() ? 'right' : 'left';
1058
1059                 $wgOut->addHTML( <<<EOT
1060         <form id='upload' method='post' enctype='multipart/form-data' action="$action">
1061                 <table border='0'>
1062                 <tr>
1063           {$this->uploadFormTextTop}
1064                         <td align='$align1' valign='top'><label for='wpUploadFile'>{$sourcefilename}:</label></td>
1065                         <td align='$align2'>
1066                                 {$filename_form}
1067                         </td>
1068                 </tr>
1069                 <tr>
1070                         <td align='$align1'><label for='wpDestFile'>{$destfilename}:</label></td>
1071                         <td align='$align2'>
1072                                 <input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='40'
1073                                         value="$encDestName" $destOnkeyup />
1074                         </td>
1075                 </tr>
1076                 <tr>
1077                         <td align='$align1'><label for='wpUploadDescription'>{$summary}</label></td>
1078                         <td align='$align2'>
1079                                 <textarea tabindex='3' name='wpUploadDescription' id='wpUploadDescription' rows='6'
1080                                         cols='{$cols}'{$width}>$encComment</textarea>
1081            {$this->uploadFormTextAfterSummary}
1082                         </td>
1083                 </tr>
1084                 <tr>
1085 EOT
1086                 );
1087
1088                 if ( $licenseshtml != '' ) {
1089                         global $wgStylePath;
1090                         $wgOut->addHTML( "
1091                         <td align='$align1'><label for='wpLicense'>$license:</label></td>
1092                         <td align='$align2'>
1093                                 <select name='wpLicense' id='wpLicense' tabindex='4'
1094                                         onchange='licenseSelectorCheck()'>
1095                                         <option value=''>$nolicense</option>
1096                                         $licenseshtml
1097                                 </select>
1098                         </td>
1099                         </tr>
1100                         <tr>" );
1101                         if( $useAjaxLicensePreview ) {
1102                                 $wgOut->addHtml( "
1103                                         <td></td>
1104                                         <td id=\"mw-license-preview\"></td>
1105                                 </tr>
1106                                 <tr>" );
1107                         }
1108                 }
1109
1110                 if ( $wgUseCopyrightUpload ) {
1111                         $filestatus = wfMsgHtml ( 'filestatus' );
1112                         $copystatus =  htmlspecialchars( $this->mCopyrightStatus );
1113                         $filesource = wfMsgHtml ( 'filesource' );
1114                         $uploadsource = htmlspecialchars( $this->mCopyrightSource );
1115
1116                         $wgOut->addHTML( "
1117                                 <td align='$align1' nowrap='nowrap'><label for='wpUploadCopyStatus'>$filestatus:</label></td>
1118                                         <td><input tabindex='5' type='text' name='wpUploadCopyStatus' id='wpUploadCopyStatus'
1119                                           value=\"$copystatus\" size='40' /></td>
1120                         </tr>
1121                         <tr>
1122                                 <td align='$align1'><label for='wpUploadCopyStatus'>$filesource:</label></td>
1123                                         <td><input tabindex='6' type='text' name='wpUploadSource' id='wpUploadCopyStatus'
1124                                           value=\"$uploadsource\" size='40' /></td>
1125                         </tr>
1126                         <tr>
1127                 ");
1128                 }
1129
1130                 $wgOut->addHtml( "
1131                 <td></td>
1132                 <td>
1133                         <input tabindex='7' type='checkbox' name='wpWatchthis' id='wpWatchthis' $watchChecked value='true' />
1134                         <label for='wpWatchthis'>" . wfMsgHtml( 'watchthisupload' ) . "</label>
1135                         <input tabindex='8' type='checkbox' name='wpIgnoreWarning' id='wpIgnoreWarning' value='true' $warningChecked/>
1136                         <label for='wpIgnoreWarning'>" . wfMsgHtml( 'ignorewarnings' ) . "</label>
1137                 </td>
1138         </tr>
1139         $warningRow
1140         <tr>
1141                 <td></td>
1142                 <td align='$align2'><input tabindex='9' type='submit' name='wpUpload' value=\"{$ulb}\"" . $wgUser->getSkin()->tooltipAndAccesskey( 'upload' ) . " /></td>
1143         </tr>
1144         <tr>
1145                 <td></td>
1146                 <td align='$align2'>
1147                 " );
1148                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1149                 $wgOut->addHTML( "
1150                 </td>
1151         </tr>
1152
1153         </table>
1154         <input type='hidden' name='wpDestFileWarningAck' id='wpDestFileWarningAck' value=''/>
1155         </form>" );
1156         }
1157
1158         /* -------------------------------------------------------------- */
1159
1160         /**
1161          * Split a file into a base name and all dot-delimited 'extensions'
1162          * on the end. Some web server configurations will fall back to
1163          * earlier pseudo-'extensions' to determine type and execute
1164          * scripts, so the blacklist needs to check them all.
1165          *
1166          * @return array
1167          */
1168         function splitExtensions( $filename ) {
1169                 $bits = explode( '.', $filename );
1170                 $basename = array_shift( $bits );
1171                 return array( $basename, $bits );
1172         }
1173
1174         /**
1175          * Perform case-insensitive match against a list of file extensions.
1176          * Returns true if the extension is in the list.
1177          *
1178          * @param string $ext
1179          * @param array $list
1180          * @return bool
1181          */
1182         function checkFileExtension( $ext, $list ) {
1183                 return in_array( strtolower( $ext ), $list );
1184         }
1185
1186         /**
1187          * Perform case-insensitive match against a list of file extensions.
1188          * Returns true if any of the extensions are in the list.
1189          *
1190          * @param array $ext
1191          * @param array $list
1192          * @return bool
1193          */
1194         function checkFileExtensionList( $ext, $list ) {
1195                 foreach( $ext as $e ) {
1196                         if( in_array( strtolower( $e ), $list ) ) {
1197                                 return true;
1198                         }
1199                 }
1200                 return false;
1201         }
1202
1203         /**
1204          * Verifies that it's ok to include the uploaded file
1205          *
1206          * @param string $tmpfile the full path of the temporary file to verify
1207          * @param string $extension The filename extension that the file is to be served with
1208          * @return mixed true of the file is verified, a WikiError object otherwise.
1209          */
1210         function verify( $tmpfile, $extension ) {
1211                 #magically determine mime type
1212                 $magic=& MimeMagic::singleton();
1213                 $mime= $magic->guessMimeType($tmpfile,false);
1214
1215                 #check mime type, if desired
1216                 global $wgVerifyMimeType;
1217                 if ($wgVerifyMimeType) {
1218
1219                   wfDebug ( "\n\nmime: <$mime> extension: <$extension>\n\n");
1220                         #check mime type against file extension
1221                         if( !$this->verifyExtension( $mime, $extension ) ) {
1222                                 return new WikiErrorMsg( 'uploadcorrupt' );
1223                         }
1224
1225                         #check mime type blacklist
1226                         global $wgMimeTypeBlacklist;
1227                         if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist)
1228                                 && $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
1229                                 return new WikiErrorMsg( 'filetype-badmime', htmlspecialchars( $mime ) );
1230                         }
1231                 }
1232
1233                 #check for htmlish code and javascript
1234                 if( $this->detectScript ( $tmpfile, $mime, $extension ) ) {
1235                         return new WikiErrorMsg( 'uploadscripted' );
1236                 }
1237
1238                 /**
1239                 * Scan the uploaded file for viruses
1240                 */
1241                 $virus= $this->detectVirus($tmpfile);
1242                 if ( $virus ) {
1243                         return new WikiErrorMsg( 'uploadvirus', htmlspecialchars($virus) );
1244                 }
1245
1246                 wfDebug( __METHOD__.": all clear; passing.\n" );
1247                 return true;
1248         }
1249
1250         /**
1251          * Checks if the mime type of the uploaded file matches the file extension.
1252          *
1253          * @param string $mime the mime type of the uploaded file
1254          * @param string $extension The filename extension that the file is to be served with
1255          * @return bool
1256          */
1257         function verifyExtension( $mime, $extension ) {
1258                 $magic =& MimeMagic::singleton();
1259
1260                 if ( ! $mime || $mime == 'unknown' || $mime == 'unknown/unknown' )
1261                         if ( ! $magic->isRecognizableExtension( $extension ) ) {
1262                                 wfDebug( __METHOD__.": passing file with unknown detected mime type; " .
1263                                         "unrecognized extension '$extension', can't verify\n" );
1264                                 return true;
1265                         } else {
1266                                 wfDebug( __METHOD__.": rejecting file with unknown detected mime type; ".
1267                                         "recognized extension '$extension', so probably invalid file\n" );
1268                                 return false;
1269                         }
1270
1271                 $match= $magic->isMatchingExtension($extension,$mime);
1272
1273                 if ($match===NULL) {
1274                         wfDebug( __METHOD__.": no file extension known for mime type $mime, passing file\n" );
1275                         return true;
1276                 } elseif ($match===true) {
1277                         wfDebug( __METHOD__.": mime type $mime matches extension $extension, passing file\n" );
1278
1279                         #TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
1280                         return true;
1281
1282                 } else {
1283                         wfDebug( __METHOD__.": mime type $mime mismatches file extension $extension, rejecting file\n" );
1284                         return false;
1285                 }
1286         }
1287
1288         /**
1289          * Heuristic for detecting files that *could* contain JavaScript instructions or
1290          * things that may look like HTML to a browser and are thus
1291          * potentially harmful. The present implementation will produce false positives in some situations.
1292          *
1293          * @param string $file Pathname to the temporary upload file
1294          * @param string $mime The mime type of the file
1295          * @param string $extension The extension of the file
1296          * @return bool true if the file contains something looking like embedded scripts
1297          */
1298         function detectScript($file, $mime, $extension) {
1299                 global $wgAllowTitlesInSVG;
1300
1301                 #ugly hack: for text files, always look at the entire file.
1302                 #For binarie field, just check the first K.
1303
1304                 if (strpos($mime,'text/')===0) $chunk = file_get_contents( $file );
1305                 else {
1306                         $fp = fopen( $file, 'rb' );
1307                         $chunk = fread( $fp, 1024 );
1308                         fclose( $fp );
1309                 }
1310
1311                 $chunk= strtolower( $chunk );
1312
1313                 if (!$chunk) return false;
1314
1315                 #decode from UTF-16 if needed (could be used for obfuscation).
1316                 if (substr($chunk,0,2)=="\xfe\xff") $enc= "UTF-16BE";
1317                 elseif (substr($chunk,0,2)=="\xff\xfe") $enc= "UTF-16LE";
1318                 else $enc= NULL;
1319
1320                 if ($enc) $chunk= iconv($enc,"ASCII//IGNORE",$chunk);
1321
1322                 $chunk= trim($chunk);
1323
1324                 #FIXME: convert from UTF-16 if necessarry!
1325
1326                 wfDebug("SpecialUpload::detectScript: checking for embedded scripts and HTML stuff\n");
1327
1328                 #check for HTML doctype
1329                 if (eregi("<!DOCTYPE *X?HTML",$chunk)) return true;
1330
1331                 /**
1332                 * Internet Explorer for Windows performs some really stupid file type
1333                 * autodetection which can cause it to interpret valid image files as HTML
1334                 * and potentially execute JavaScript, creating a cross-site scripting
1335                 * attack vectors.
1336                 *
1337                 * Apple's Safari browser also performs some unsafe file type autodetection
1338                 * which can cause legitimate files to be interpreted as HTML if the
1339                 * web server is not correctly configured to send the right content-type
1340                 * (or if you're really uploading plain text and octet streams!)
1341                 *
1342                 * Returns true if IE is likely to mistake the given file for HTML.
1343                 * Also returns true if Safari would mistake the given file for HTML
1344                 * when served with a generic content-type.
1345                 */
1346
1347                 $tags = array(
1348                         '<body',
1349                         '<head',
1350                         '<html',   #also in safari
1351                         '<img',
1352                         '<pre',
1353                         '<script', #also in safari
1354                         '<table'
1355                         );
1356                 if( ! $wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
1357                         $tags[] = '<title';
1358                 }
1359
1360                 foreach( $tags as $tag ) {
1361                         if( false !== strpos( $chunk, $tag ) ) {
1362                                 return true;
1363                         }
1364                 }
1365
1366                 /*
1367                 * look for javascript
1368                 */
1369
1370                 #resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1371                 $chunk = Sanitizer::decodeCharReferences( $chunk );
1372
1373                 #look for script-types
1374                 if (preg_match('!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim',$chunk)) return true;
1375
1376                 #look for html-style script-urls
1377                 if (preg_match('!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1378
1379                 #look for css-style script-urls
1380                 if (preg_match('!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1381
1382                 wfDebug("SpecialUpload::detectScript: no scripts found\n");
1383                 return false;
1384         }
1385
1386         /**
1387          * Generic wrapper function for a virus scanner program.
1388          * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
1389          * $wgAntivirusRequired may be used to deny upload if the scan fails.
1390          *
1391          * @param string $file Pathname to the temporary upload file
1392          * @return mixed false if not virus is found, NULL if the scan fails or is disabled,
1393          *         or a string containing feedback from the virus scanner if a virus was found.
1394          *         If textual feedback is missing but a virus was found, this function returns true.
1395          */
1396         function detectVirus($file) {
1397                 global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
1398
1399                 if ( !$wgAntivirus ) {
1400                         wfDebug( __METHOD__.": virus scanner disabled\n");
1401                         return NULL;
1402                 }
1403
1404                 if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1405                         wfDebug( __METHOD__.": unknown virus scanner: $wgAntivirus\n" );
1406                         # @TODO: localise
1407                         $wgOut->addHTML( "<div class='error'>Bad configuration: unknown virus scanner: <i>$wgAntivirus</i></div>\n" );
1408                         return "unknown antivirus: $wgAntivirus";
1409                 }
1410
1411                 # look up scanner configuration
1412                 $command = $wgAntivirusSetup[$wgAntivirus]["command"];
1413                 $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]["codemap"];
1414                 $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]["messagepattern"] ) ?
1415                         $wgAntivirusSetup[$wgAntivirus]["messagepattern"] : null;
1416
1417                 if ( strpos( $command,"%f" ) === false ) {
1418                         # simple pattern: append file to scan
1419                         $command .= " " . wfEscapeShellArg( $file );
1420                 } else {
1421                         # complex pattern: replace "%f" with file to scan
1422                         $command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
1423                 }
1424
1425                 wfDebug( __METHOD__.": running virus scan: $command \n" );
1426
1427                 # execute virus scanner
1428                 $exitCode = false;
1429
1430                 #NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1431                 #      that does not seem to be worth the pain.
1432                 #      Ask me (Duesentrieb) about it if it's ever needed.
1433                 $output = array();
1434                 if ( wfIsWindows() ) {
1435                         exec( "$command", $output, $exitCode );
1436                 } else {
1437                         exec( "$command 2>&1", $output, $exitCode );
1438                 }
1439
1440                 # map exit code to AV_xxx constants.
1441                 $mappedCode = $exitCode;
1442                 if ( $exitCodeMap ) {
1443                         if ( isset( $exitCodeMap[$exitCode] ) ) {
1444                                 $mappedCode = $exitCodeMap[$exitCode];
1445                         } elseif ( isset( $exitCodeMap["*"] ) ) {
1446                                 $mappedCode = $exitCodeMap["*"];
1447                         }
1448                 }
1449
1450                 if ( $mappedCode === AV_SCAN_FAILED ) {
1451                         # scan failed (code was mapped to false by $exitCodeMap)
1452                         wfDebug( __METHOD__.": failed to scan $file (code $exitCode).\n" );
1453
1454                         if ( $wgAntivirusRequired ) {
1455                                 return "scan failed (code $exitCode)";
1456                         } else {
1457                                 return NULL;
1458                         }
1459                 } else if ( $mappedCode === AV_SCAN_ABORTED ) {
1460                         # scan failed because filetype is unknown (probably imune)
1461                         wfDebug( __METHOD__.": unsupported file type $file (code $exitCode).\n" );
1462                         return NULL;
1463                 } else if ( $mappedCode === AV_NO_VIRUS ) {
1464                         # no virus found
1465                         wfDebug( __METHOD__.": file passed virus scan.\n" );
1466                         return false;
1467                 } else {
1468                         $output = join( "\n", $output );
1469                         $output = trim( $output );
1470
1471                         if ( !$output ) {
1472                                 $output = true; #if there's no output, return true
1473                         } elseif ( $msgPattern ) {
1474                                 $groups = array();
1475                                 if ( preg_match( $msgPattern, $output, $groups ) ) {
1476                                         if ( $groups[1] ) {
1477                                                 $output = $groups[1];
1478                                         }
1479                                 }
1480                         }
1481
1482                         wfDebug( __METHOD__.": FOUND VIRUS! scanner feedback: $output" );
1483                         return $output;
1484                 }
1485         }
1486
1487         /**
1488          * Check if the temporary file is MacBinary-encoded, as some uploads
1489          * from Internet Explorer on Mac OS Classic and Mac OS X will be.
1490          * If so, the data fork will be extracted to a second temporary file,
1491          * which will then be checked for validity and either kept or discarded.
1492          *
1493          * @access private
1494          */
1495         function checkMacBinary() {
1496                 $macbin = new MacBinary( $this->mTempPath );
1497                 if( $macbin->isValid() ) {
1498                         $dataFile = tempnam( wfTempDir(), "WikiMacBinary" );
1499                         $dataHandle = fopen( $dataFile, 'wb' );
1500
1501                         wfDebug( "SpecialUpload::checkMacBinary: Extracting MacBinary data fork to $dataFile\n" );
1502                         $macbin->extractData( $dataHandle );
1503
1504                         $this->mTempPath = $dataFile;
1505                         $this->mFileSize = $macbin->dataForkLength();
1506
1507                         // We'll have to manually remove the new file if it's not kept.
1508                         $this->mRemoveTempFile = true;
1509                 }
1510                 $macbin->close();
1511         }
1512
1513         /**
1514          * If we've modified the upload file we need to manually remove it
1515          * on exit to clean up.
1516          * @access private
1517          */
1518         function cleanupTempFile() {
1519                 if ( $this->mRemoveTempFile && file_exists( $this->mTempPath ) ) {
1520                         wfDebug( "SpecialUpload::cleanupTempFile: Removing temporary file {$this->mTempPath}\n" );
1521                         unlink( $this->mTempPath );
1522                 }
1523         }
1524
1525         /**
1526          * Check if there's an overwrite conflict and, if so, if restrictions
1527          * forbid this user from performing the upload.
1528          *
1529          * @return mixed true on success, WikiError on failure
1530          * @access private
1531          */
1532         function checkOverwrite( $name ) {
1533                 $img = wfFindFile( $name );
1534
1535                 $error = '';
1536                 if( $img ) {
1537                         global $wgUser, $wgOut;
1538                         if( $img->isLocal() ) {
1539                                 if( !self::userCanReUpload( $wgUser, $img->name ) ) {
1540                                         $error = 'fileexists-forbidden';
1541                                 }
1542                         } else {
1543                                 if( !$wgUser->isAllowed( 'reupload' ) ||
1544                                     !$wgUser->isAllowed( 'reupload-shared' ) ) {
1545                                         $error = "fileexists-shared-forbidden";
1546                                 }
1547                         }
1548                 }
1549
1550                 if( $error ) {
1551                         $errorText = wfMsg( $error, wfEscapeWikiText( $img->getName() ) );
1552                         return $errorText;
1553                 }
1554
1555                 // Rockin', go ahead and upload
1556                 return true;
1557         }
1558
1559          /**
1560          * Check if a user is the last uploader
1561          *
1562          * @param User $user
1563          * @param string $img, image name
1564          * @return bool
1565          */
1566         public static function userCanReUpload( User $user, $img ) {
1567                 if( $user->isAllowed( 'reupload' ) )
1568                         return true; // non-conditional
1569                 if( !$user->isAllowed( 'reupload-own' ) )
1570                         return false;
1571
1572                 $dbr = wfGetDB( DB_SLAVE );
1573                 $row = $dbr->selectRow('image',
1574                 /* SELECT */ 'img_user',
1575                 /* WHERE */ array( 'img_name' => $img )
1576                 );
1577                 if ( !$row )
1578                         return false;
1579
1580                 return $user->getID() == $row->img_user;
1581         }
1582
1583         /**
1584          * Display an error with a wikitext description
1585          */
1586         function showError( $description ) {
1587                 global $wgOut;
1588                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
1589                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1590                 $wgOut->setArticleRelated( false );
1591                 $wgOut->enableClientCache( false );
1592                 $wgOut->addWikiText( $description );
1593         }
1594
1595         /**
1596          * Get the initial image page text based on a comment and optional file status information
1597          */
1598         static function getInitialPageText( $comment, $license, $copyStatus, $source ) {
1599                 global $wgUseCopyrightUpload;
1600                 if ( $wgUseCopyrightUpload ) {
1601                         if ( $license != '' ) {
1602                                 $licensetxt = '== ' . wfMsgForContent( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1603                         }
1604                         $pageText = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n" .
1605                           '== ' . wfMsgForContent ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
1606                           "$licensetxt" .
1607                           '== ' . wfMsgForContent ( 'filesource' ) . " ==\n" . $source ;
1608                 } else {
1609                         if ( $license != '' ) {
1610                                 $filedesc = $comment == '' ? '' : '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n";
1611                                  $pageText = $filedesc .
1612                                          '== ' . wfMsgForContent ( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1613                         } else {
1614                                 $pageText = $comment;
1615                         }
1616                 }
1617                 return $pageText;
1618         }
1619
1620         /**
1621          * If there are rows in the deletion log for this file, show them,
1622          * along with a nice little note for the user
1623          *
1624          * @param OutputPage $out
1625          * @param string filename
1626          */
1627         private function showDeletionLog( $out, $filename ) {
1628                 $reader = new LogReader(
1629                         new FauxRequest(
1630                                 array(
1631                                         'page' => $filename,
1632                                         'type' => 'delete',
1633                                         )
1634                         )
1635                 );
1636                 if( $reader->hasRows() ) {
1637                         $out->addHtml( '<div id="mw-upload-deleted-warn">' );
1638                         $out->addWikiText( wfMsg( 'upload-wasdeleted' ) );
1639                         $viewer = new LogViewer( $reader );
1640                         $viewer->showList( $out );
1641                         $out->addHtml( '</div>' );
1642                 }
1643         }
1644 }