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