includes/SpecialUpload.php

   1 <?php
   2 /**
   3  *
   4  * @addtogroup SpecialPage
   5  */
   6
   7
   8 /**
   9  * Entry point
  10  */
  11 function wfSpecialUpload() {
  12         global $wgRequest;
  13         $form = new UploadForm( $wgRequest );
  14         $form->execute();
  15 }
  16
  17 /**
  18  * implements Special:Upload
  19  * @addtogroup SpecialPage
  20  */
  21 class UploadForm {
  22         const SUCCESS = 0;
  23         const BEFORE_PROCESSING = 1;
  24         const LARGE_FILE_SERVER = 2;
  25         const EMPTY_FILE = 3;
  26         const MIN_LENGHT_PARTNAME = 4;
  27         const ILLEGAL_FILENAME = 5;
  28         const PROTECTED_PAGE = 6;
  29         const OVERWRITE_EXISTING_FILE = 7;
  30         const FILETYPE_MISSING = 8;
  31         const FILETYPE_BADTYPE = 9;
  32         const VERIFICATION_ERROR = 10;
  33         const UPLOAD_VERIFICATION_ERROR = 11;
  34         const UPLOAD_WARNING = 12;
  35         const INTERNAL_ERROR = 13;
  36
  37         /**#@+
  38          * @access private
  39          */
  40         var $mComment, $mLicense, $mIgnoreWarning, $mCurlError;
  41         var $mDestName, $mTempPath, $mFileSize, $mFileProps;
  42         var $mCopyrightStatus, $mCopyrightSource, $mReUpload, $mAction, $mUploadClicked;
  43         var $mSrcName, $mSessionKey, $mStashed, $mDesiredDestName, $mRemoveTempFile, $mSourceType;
  44         var $mDestWarningAck, $mCurlDestHandle;
  45         var $mLocalFile;
  46
  47         # Placeholders for text injection by hooks (must be HTML)
  48         # extensions should take care to _append_ to the present value
  49         var $uploadFormTextTop;
  50         var $uploadFormTextAfterSummary;
  51
  52         const SESSION_VERSION = 1;
  53         /**#@-*/
  54
  55         /**
  56          * Constructor : initialise object
  57          * Get data POSTed through the form and assign them to the object
  58          * @param $request Data posted.
  59          */
  60         function UploadForm( &$request ) {
  61                 global $wgAllowCopyUploads;
  62                 $this->mDesiredDestName   = $request->getText( 'wpDestFile' );
  63                 $this->mIgnoreWarning     = $request->getCheck( 'wpIgnoreWarning' );
  64                 $this->mComment           = $request->getText( 'wpUploadDescription' );
  65
  66                 if( !$request->wasPosted() ) {
  67                         # GET requests just give the main form; no data except destination
  68                         # filename and description
  69                         return;
  70                 }
  71
  72                 # Placeholders for text injection by hooks (empty per default)
  73                 $this->uploadFormTextTop = "";
  74                 $this->uploadFormTextAfterSummary = "";
  75
  76                 $this->mReUpload          = $request->getCheck( 'wpReUpload' );
  77                 $this->mUploadClicked     = $request->getCheck( 'wpUpload' );
  78
  79                 $this->mLicense           = $request->getText( 'wpLicense' );
  80                 $this->mCopyrightStatus   = $request->getText( 'wpUploadCopyStatus' );
  81                 $this->mCopyrightSource   = $request->getText( 'wpUploadSource' );
  82                 $this->mWatchthis         = $request->getBool( 'wpWatchthis' );
  83                 $this->mSourceType        = $request->getText( 'wpSourceType' );
  84                 $this->mDestWarningAck    = $request->getText( 'wpDestFileWarningAck' );
  85
  86                 $this->mAction            = $request->getVal( 'action' );
  87
  88                 $this->mSessionKey        = $request->getInt( 'wpSessionKey' );
  89                 if( !empty( $this->mSessionKey ) &&
  90                         isset( $_SESSION['wsUploadData'][$this->mSessionKey]['version'] ) &&
  91                         $_SESSION['wsUploadData'][$this->mSessionKey]['version'] == self::SESSION_VERSION ) {
  92                         /**
  93                          * Confirming a temporarily stashed upload.
  94                          * We don't want path names to be forged, so we keep
  95                          * them in the session on the server and just give
  96                          * an opaque key to the user agent.
  97                          */
  98                         $data = $_SESSION['wsUploadData'][$this->mSessionKey];
  99                         $this->mTempPath         = $data['mTempPath'];
 100                         $this->mFileSize         = $data['mFileSize'];
 101                         $this->mSrcName          = $data['mSrcName'];
 102                         $this->mFileProps        = $data['mFileProps'];
 103                         $this->mCurlError        = 0/*UPLOAD_ERR_OK*/;
 104                         $this->mStashed          = true;
 105                         $this->mRemoveTempFile   = false;
 106                 } else {
 107                         /**
 108                          *Check for a newly uploaded file.
 109                          */
 110                         if( $wgAllowCopyUploads && $this->mSourceType == 'web' ) {
 111                                 $this->initializeFromUrl( $request );
 112                         } else {
 113                                 $this->initializeFromUpload( $request );
 114                         }
 115                 }
 116         }
 117
 118         /**
 119          * Initialize the uploaded file from PHP data
 120          * @access private
 121          */
 122         function initializeFromUpload( $request ) {
 123                 $this->mTempPath       = $request->getFileTempName( 'wpUploadFile' );
 124                 $this->mFileSize       = $request->getFileSize( 'wpUploadFile' );
 125                 $this->mSrcName        = $request->getFileName( 'wpUploadFile' );
 126                 $this->mCurlError      = $request->getUploadError( 'wpUploadFile' );
 127                 $this->mSessionKey     = false;
 128                 $this->mStashed        = false;
 129                 $this->mRemoveTempFile = false; // PHP will handle this
 130         }
 131
 132         /**
 133          * Copy a web file to a temporary file
 134          * @access private
 135          */
 136         function initializeFromUrl( $request ) {
 137                 global $wgTmpDirectory;
 138                 $url = $request->getText( 'wpUploadFileURL' );
 139                 $local_file = tempnam( $wgTmpDirectory, 'WEBUPLOAD' );
 140
 141                 $this->mTempPath       = $local_file;
 142                 $this->mFileSize       = 0; # Will be set by curlCopy
 143                 $this->mCurlError      = $this->curlCopy( $url, $local_file );
 144                 $this->mSrcName        = array_pop( explode( '/', $url ) );
 145                 $this->mSessionKey     = false;
 146                 $this->mStashed        = false;
 147
 148                 // PHP won't auto-cleanup the file
 149                 $this->mRemoveTempFile = file_exists( $local_file );
 150         }
 151
 152         /**
 153          * Safe copy from URL
 154          * Returns true if there was an error, false otherwise
 155          */
 156         private function curlCopy( $url, $dest ) {
 157                 global $wgUser, $wgOut;
 158
 159                 if( !$wgUser->isAllowed( 'upload_by_url' ) ) {
 160                         $wgOut->permissionRequired( 'upload_by_url' );
 161                         return true;
 162                 }
 163
 164                 # Maybe remove some pasting blanks :-)
 165                 $url =  trim( $url );
 166                 if( stripos($url, 'http://') !== 0 && stripos($url, 'ftp://') !== 0 ) {
 167                         # Only HTTP or FTP URLs
 168                         $wgOut->errorPage( 'upload-proto-error', 'upload-proto-error-text' );
 169                         return true;
 170                 }
 171
 172                 # Open temporary file
 173                 $this->mCurlDestHandle = @fopen( $this->mTempPath, "wb" );
 174                 if( $this->mCurlDestHandle === false ) {
 175                         # Could not open temporary file to write in
 176                         $wgOut->errorPage( 'upload-file-error', 'upload-file-error-text');
 177                         return true;
 178                 }
 179
 180                 $ch = curl_init();
 181                 curl_setopt( $ch, CURLOPT_HTTP_VERSION, 1.0); # Probably not needed, but apparently can work around some bug
 182                 curl_setopt( $ch, CURLOPT_TIMEOUT, 10); # 10 seconds timeout
 183                 curl_setopt( $ch, CURLOPT_LOW_SPEED_LIMIT, 512); # 0.5KB per second minimum transfer speed
 184                 curl_setopt( $ch, CURLOPT_URL, $url);
 185                 curl_setopt( $ch, CURLOPT_WRITEFUNCTION, array( $this, 'uploadCurlCallback' ) );
 186                 curl_exec( $ch );
 187                 $error = curl_errno( $ch ) ? true : false;
 188                 $errornum =  curl_errno( $ch );
 189                 // if ( $error ) print curl_error ( $ch ) ; # Debugging output
 190                 curl_close( $ch );
 191
 192                 fclose( $this->mCurlDestHandle );
 193                 unset( $this->mCurlDestHandle );
 194                 if( $error ) {
 195                         unlink( $dest );
 196                         if( wfEmptyMsg( "upload-curl-error$errornum", wfMsg("upload-curl-error$errornum") ) )
 197                                 $wgOut->errorPage( 'upload-misc-error', 'upload-misc-error-text' );
 198                         else
 199                                 $wgOut->errorPage( "upload-curl-error$errornum", "upload-curl-error$errornum-text" );
 200                 }
 201
 202                 return $error;
 203         }
 204
 205         /**
 206          * Callback function for CURL-based web transfer
 207          * Write data to file unless we've passed the length limit;
 208          * if so, abort immediately.
 209          * @access private
 210          */
 211         function uploadCurlCallback( $ch, $data ) {
 212                 global $wgMaxUploadSize;
 213                 $length = strlen( $data );
 214                 $this->mFileSize += $length;
 215                 if( $this->mFileSize > $wgMaxUploadSize ) {
 216                         return 0;
 217                 }
 218                 fwrite( $this->mCurlDestHandle, $data );
 219                 return $length;
 220         }
 221
 222         /**
 223          * Start doing stuff
 224          * @access public
 225          */
 226         function execute() {
 227                 global $wgUser, $wgOut;
 228                 global $wgEnableUploads;
 229
 230                 # Check uploading enabled
 231                 if( !$wgEnableUploads ) {
 232                         $wgOut->showErrorPage( 'uploaddisabled', 'uploaddisabledtext', array( $this->mDesiredDestName ) );
 233                         return;
 234                 }
 235
 236                 # Check permissions
 237                 if( !$wgUser->isAllowed( 'upload' ) ) {
 238                         if( !$wgUser->isLoggedIn() ) {
 239                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
 240                         } else {
 241                                 $wgOut->permissionRequired( 'upload' );
 242                         }
 243                         return;
 244                 }
 245
 246                 # Check blocks
 247                 if( $wgUser->isBlocked() ) {
 248                         $wgOut->blockedPage();
 249                         return;
 250                 }
 251
 252                 if( wfReadOnly() ) {
 253                         $wgOut->readOnlyPage();
 254                         return;
 255                 }
 256
 257                 if( $this->mReUpload ) {
 258                         if( !$this->unsaveUploadedFile() ) {
 259                                 return;
 260                         }
 261                         $this->mainUploadForm();
 262                 } else if( 'submit' == $this->mAction || $this->mUploadClicked ) {
 263                         $this->processUpload();
 264                 } else {
 265                         $this->mainUploadForm();
 266                 }
 267
 268                 $this->cleanupTempFile();
 269         }
 270
 271         /**
 272          * Do the upload
 273          * Checks are made in SpecialUpload::execute()
 274          *
 275          * @access private
 276          */
 277         function processUpload(){
 278                 global $wgUser, $wgOut, $wgFileExtensions;
 279                 $details = null;
 280                 $value = null;
 281                 $value = $this->internalProcessUpload( $details );
 282
 283                 switch($value) {
 284                         case self::SUCCESS:
 285                                 $wgOut->redirect( $this->mLocalFile->getTitle()->getFullURL() );
 286                                 break;
 287
 288                         case self::BEFORE_PROCESSING:
 289                                 break;
 290
 291                         case self::LARGE_FILE_SERVER:
 292                                 $this->mainUploadForm( wfMsgHtml( 'largefileserver' ) );
 293                                 break;
 294
 295                         case self::EMPTY_FILE:
 296                                 $this->mainUploadForm( wfMsgHtml( 'emptyfile' ) );
 297                                 break;
 298
 299                         case self::MIN_LENGHT_PARTNAME:
 300                                 $this->mainUploadForm( wfMsgHtml( 'minlength1' ) );
 301                                 break;
 302
 303                         case self::ILLEGAL_FILENAME:
 304                                 $filtered = $details['filtered'];
 305                                 $this->uploadError( wfMsgWikiHtml( 'illegalfilename', htmlspecialchars( $filtered ) ) );
 306                                 break;
 307
 308                         case self::PROTECTED_PAGE:
 309                                 $this->uploadError( wfMsgWikiHtml( 'protectedpage' ) );
 310                                 break;
 311
 312                         case self::OVERWRITE_EXISTING_FILE:
 313                                 $errorText = $details['overwrite'];
 314                                 $overwrite = new WikiError( $wgOut->parse( $errorText ) );
 315                                 $this->uploadError( $overwrite->toString() );
 316                                 break;
 317
 318                         case self::FILETYPE_MISSING:
 319                                 $this->uploadError( wfMsgExt( 'filetype-missing', array ( 'parseinline' ) ) );
 320                                 break;
 321
 322                         case self::FILETYPE_BADTYPE:
 323                                 $finalExt = $details['finalExt'];
 324                                 $this->uploadError( wfMsgExt( 'filetype-badtype', array ( 'parseinline' ), htmlspecialchars( $finalExt ), implode ( ', ', $wgFileExtensions ) ) );
 325                                 break;
 326
 327                         case self::VERIFICATION_ERROR:
 328                                 $veri = $details['veri'];
 329                                 $this->uploadError( $veri->toString() );
 330                                 break;
 331
 332                         case self::UPLOAD_VERIFICATION_ERROR:
 333                                 $error = $details['error'];
 334                                 $this->uploadError( $error );
 335                                 break;
 336
 337                         case self::UPLOAD_WARNING:
 338                                 $warning = $details['warning'];
 339                                 $this->uploadWarning( $warning );
 340                                 break;
 341
 342                         case self::INTERNAL_ERROR:
 343                                 $internal = $details['internal'];
 344                                 $this->showError( $internal );
 345                                 break;
 346
 347                         default:
 348                                 /* TODO: Each case returns instead of breaking to maintain the highest level of compatibility during branch merging.
 349                                 They should be reviewed and corrected separatelly.
 350                                 */
 351                                 new MWException( __METHOD__ . ": Unknown value `{$value}`" );
 352                 }
 353         }
 354
 355         /**
 356          * Really do the upload
 357          * Checks are made in SpecialUpload::execute()
 358          *
 359          * @param array $resultDetails contains result-specific dict of additional values
 360          *
 361          * @access private
 362          */
 363         function internalProcessUpload( &$resultDetails ) {
 364                 global $wgUser;
 365
 366                 if( !wfRunHooks( 'UploadForm:BeforeProcessing', array( &$this ) ) )
 367                 {
 368                         wfDebug( "Hook 'UploadForm:BeforeProcessing' broke processing the file." );
 369                         return self::BEFORE_PROCESSING;
 370                 }
 371
 372                 /* Check for PHP error if any, requires php 4.2 or newer */
 373                 if( $this->mCurlError == 1/*UPLOAD_ERR_INI_SIZE*/ ) {
 374                         return self::LARGE_FILE_SERVER;
 375                 }
 376
 377                 /**
 378                  * If there was no filename or a zero size given, give up quick.
 379                  */
 380                 if( trim( $this->mSrcName ) == '' || empty( $this->mFileSize ) ) {
 381                         return self::EMPTY_FILE;
 382                 }
 383
 384                 # Chop off any directories in the given filename
 385                 if( $this->mDesiredDestName ) {
 386                         $basename = $this->mDesiredDestName;
 387                 } else {
 388                         $basename = $this->mSrcName;
 389                 }
 390                 $filtered = wfBaseName( $basename );
 391
 392                 /**
 393                  * We'll want to blacklist against *any* 'extension', and use
 394                  * only the final one for the whitelist.
 395                  */
 396                 list( $partname, $ext ) = $this->splitExtensions( $filtered );
 397
 398                 if( count( $ext ) ) {
 399                         $finalExt = $ext[count( $ext ) - 1];
 400                 } else {
 401                         $finalExt = '';
 402                 }
 403
 404                 # If there was more than one "extension", reassemble the base
 405                 # filename to prevent bogus complaints about length
 406                 if( count( $ext ) > 1 ) {
 407                         for( $i = 0; $i < count( $ext ) - 1; $i++ )
 408                                 $partname .= '.' . $ext[$i];
 409                 }
 410
 411                 if( strlen( $partname ) < 1 ) {
 412                         return self::MIN_LENGHT_PARTNAME;
 413                 }
 414
 415                 /**
 416                  * Filter out illegal characters, and try to make a legible name
 417                  * out of it. We'll strip some silently that Title would die on.
 418                  */
 419                 $filtered = preg_replace ( "/[^".Title::legalChars()."]|:/", '-', $filtered );
 420                 $nt = Title::makeTitleSafe( NS_IMAGE, $filtered );
 421                 if( is_null( $nt ) ) {
 422                         $resultDetails = array( 'filtered' => $filtered );
 423                         return self::ILLEGAL_FILENAME;
 424                 }
 425                 $this->mLocalFile = wfLocalFile( $nt );
 426                 $this->mDestName = $this->mLocalFile->getName();
 427
 428                 /**
 429                  * If the image is protected, non-sysop users won't be able
 430                  * to modify it by uploading a new revision.
 431                  */
 432                 if( !$nt->userCan( 'edit' ) ) {
 433                         return self::PROTECTED_PAGE;
 434                 }
 435
 436                 /**
 437                  * In some cases we may forbid overwriting of existing files.
 438                  */
 439                 $overwrite = $this->checkOverwrite( $this->mDestName );
 440                 if( $overwrite !== true ) {
 441                         $resultDetails = array( 'overwrite' => $overwrite );
 442                         return self::OVERWRITE_EXISTING_FILE;
 443                 }
 444
 445                 /* Don't allow users to override the blacklist (check file extension) */
 446                 global $wgStrictFileExtensions;
 447                 global $wgFileExtensions, $wgFileBlacklist;
 448                 if ($finalExt == '') {
 449                         return self::FILETYPE_MISSING;
 450                 } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) ||
 451                                 ($wgStrictFileExtensions && !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) ) {
 452                         $resultDetails = array( 'finalExt' => $finalExt );
 453                         return self::FILETYPE_BADTYPE;
 454                 }
 455
 456                 /**
 457                  * Look at the contents of the file; if we can recognize the
 458                  * type but it's corrupt or data of the wrong type, we should
 459                  * probably not accept it.
 460                  */
 461                 if( !$this->mStashed ) {
 462                         $this->mFileProps = File::getPropsFromPath( $this->mTempPath, $finalExt );
 463                         $this->checkMacBinary();
 464                         $veri = $this->verify( $this->mTempPath, $finalExt );
 465
 466                         if( $veri !== true ) { //it's a wiki error...
 467                                 $resultDetails = array( 'veri' => $veri );
 468                                 return self::VERIFICATION_ERROR;
 469                         }
 470
 471                         /**
 472                          * Provide an opportunity for extensions to add further checks
 473                          */
 474                         $error = '';
 475                         if( !wfRunHooks( 'UploadVerification',
 476                                         array( $this->mDestName, $this->mTempPath, &$error ) ) ) {
 477                                 $resultDetails = array( 'error' => $error );
 478                                 return self::UPLOAD_VERIFICATION_ERROR;
 479                         }
 480                 }
 481
 482
 483                 /**
 484                  * Check for non-fatal conditions
 485                  */
 486                 if ( ! $this->mIgnoreWarning ) {
 487                         $warning = '';
 488
 489                         global $wgCapitalLinks;
 490                         if( $wgCapitalLinks ) {
 491                                 $filtered = ucfirst( $filtered );
 492                         }
 493                         if( $basename != $filtered ) {
 494                                 $warning .=  '<li>'.wfMsgHtml( 'badfilename', htmlspecialchars( $this->mDestName ) ).'</li>';
 495                         }
 496
 497                         global $wgCheckFileExtensions;
 498                         if ( $wgCheckFileExtensions ) {
 499                                 if ( ! $this->checkFileExtension( $finalExt, $wgFileExtensions ) ) {
 500                                         $warning .= '<li>'.wfMsgExt( 'filetype-badtype', array ( 'parseinline' ),
 501                                                 htmlspecialchars( $finalExt ), implode ( ', ', $wgFileExtensions ) ).'</li>';
 502                                 }
 503                         }
 504
 505                         global $wgUploadSizeWarning;
 506                         if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) {
 507                                 $skin = $wgUser->getSkin();
 508                                 $wsize = $skin->formatSize( $wgUploadSizeWarning );
 509                                 $asize = $skin->formatSize( $this->mFileSize );
 510                                 $warning .= '<li>' . wfMsgHtml( 'large-file', $wsize, $asize ) . '</li>';
 511                         }
 512                         if ( $this->mFileSize == 0 ) {
 513                                 $warning .= '<li>'.wfMsgHtml( 'emptyfile' ).'</li>';
 514                         }
 515
 516                         if ( !$this->mDestWarningAck ) {
 517                                 $warning .= self::getExistsWarning( $this->mLocalFile );
 518                         }
 519                         if( $warning != '' ) {
 520                                 /**
 521                                  * Stash the file in a temporary location; the user can choose
 522                                  * to let it through and we'll complete the upload then.
 523                                  */
 524                                 $resultDetails = array( 'warning' => $warning );
 525                                 return self::UPLOAD_WARNING;
 526                         }
 527                 }
 528
 529                 /**
 530                  * Try actually saving the thing...
 531                  * It will show an error form on failure.
 532                  */
 533                 $pageText = self::getInitialPageText( $this->mComment, $this->mLicense,
 534                         $this->mCopyrightStatus, $this->mCopyrightSource );
 535
 536                 $status = $this->mLocalFile->upload( $this->mTempPath, $this->mComment, $pageText,
 537                         File::DELETE_SOURCE, $this->mFileProps );
 538                 if ( !$status->isGood() ) {
 539                         $resultDetails = array( 'internal' => $status->getWikiText() );
 540                         return self::INTERNAL_ERROR;
 541                 } else {
 542                         if ( $this->mWatchthis ) {
 543                                 global $wgUser;
 544                                 $wgUser->addWatch( $this->mLocalFile->getTitle() );
 545                         }
 546                         // Success, redirect to description page
 547                         $img = null; // @todo: added to avoid passing a ref to null - should this be defined somewhere?
 548                         wfRunHooks( 'UploadComplete', array( &$img ) );
 549                         return self::SUCCESS;
 550                 }
 551         }
 552
 553         /**
 554          * Do existence checks on a file and produce a warning
 555          * This check is static and can be done pre-upload via AJAX
 556          * Returns an HTML fragment consisting of one or more LI elements if there is a warning
 557          * Returns an empty string if there is no warning
 558          */
 559         static function getExistsWarning( $file ) {
 560                 global $wgUser;
 561                 // Check for uppercase extension. We allow these filenames but check if an image
 562                 // with lowercase extension exists already
 563                 $warning = '';
 564
 565                 if( strpos( $file->getName(), '.' ) == false ) {
 566                         $partname = $file->getName();
 567                         $rawExtension = '';
 568                 } else {
 569                         list( $partname, $rawExtension ) = explode( '.', $file->getName(), 2 );
 570                 }
 571                 $sk = $wgUser->getSkin();
 572
 573                 if ( $rawExtension != $file->getExtension() ) {
 574                         // We're not using the normalized form of the extension.
 575                         // Normal form is lowercase, using most common of alternate
 576                         // extensions (eg 'jpg' rather than 'JPEG').
 577                         //
 578                         // Check for another file using the normalized form...
 579                         $nt_lc = Title::newFromText( $partname . '.' . $file->getExtension() );
 580                         $file_lc = wfLocalFile( $nt_lc );
 581                 } else {
 582                         $file_lc = false;
 583                 }
 584
 585                 if( $file->exists() ) {
 586                         $dlink = $sk->makeKnownLinkObj( $file->getTitle() );
 587                         if ( $file->allowInlineDisplay() ) {
 588                                 $dlink2 = $sk->makeImageLinkObj( $file->getTitle(), wfMsgExt( 'fileexists-thumb', 'parseinline', $dlink ),
 589                                         $file->getName(), 'right', array(), false, true );
 590                         } elseif ( !$file->allowInlineDisplay() && $file->isSafeFile() ) {
 591                                 $icon = $file->iconThumb();
 592                                 $dlink2 = '<div style="float:right" id="mw-media-icon">' .
 593                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 594                         } else {
 595                                 $dlink2 = '';
 596                         }
 597
 598                         $warning .= '<li>' . wfMsgExt( 'fileexists', 'parseline', $dlink ) . '</li>' . $dlink2;
 599
 600                 } elseif ( $file_lc && $file_lc->exists() ) {
 601                         # Check if image with lowercase extension exists.
 602                         # It's not forbidden but in 99% it makes no sense to upload the same filename with uppercase extension
 603                         $dlink = $sk->makeKnownLinkObj( $nt_lc );
 604                         if ( $file_lc->allowInlineDisplay() ) {
 605                                 $dlink2 = $sk->makeImageLinkObj( $nt_lc, wfMsgExt( 'fileexists-thumb', 'parseinline', $dlink ),
 606                                         $nt_lc->getText(), 'right', array(), false, true );
 607                         } elseif ( !$file_lc->allowInlineDisplay() && $file_lc->isSafeFile() ) {
 608                                 $icon = $file_lc->iconThumb();
 609                                 $dlink2 = '<div style="float:right" 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-extension', 'parsemag', $file->getName(), $dlink ) . '</li>' . $dlink2;
 616
 617                 } elseif ( ( substr( $partname , 3, 3 ) == 'px-' || substr( $partname , 2, 3 ) == 'px-' )
 618                         && ereg( "[0-9]{2}" , substr( $partname , 0, 2) ) )
 619                 {
 620                         # Check for filenames like 50px- or 180px-, these are mostly thumbnails
 621                         $nt_thb = Title::newFromText( substr( $partname , strpos( $partname , '-' ) +1 ) . '.' . $rawExtension );
 622                         $file_thb = wfLocalFile( $nt_thb );
 623                         if ($file_thb->exists() ) {
 624                                 # Check if an image without leading '180px-' (or similiar) exists
 625                                 $dlink = $sk->makeKnownLinkObj( $nt_thb);
 626                                 if ( $file_thb->allowInlineDisplay() ) {
 627                                         $dlink2 = $sk->makeImageLinkObj( $nt_thb,
 628                                                 wfMsgExt( 'fileexists-thumb', 'parseinline', $dlink ),
 629                                                 $nt_thb->getText(), 'right', array(), false, true );
 630                                 } elseif ( !$file_thb->allowInlineDisplay() && $file_thb->isSafeFile() ) {
 631                                         $icon = $file_thb->iconThumb();
 632                                         $dlink2 = '<div style="float:right" id="mw-media-icon">' .
 633                                                 $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' .
 634                                                 $dlink . '</div>';
 635                                 } else {
 636                                         $dlink2 = '';
 637                                 }
 638
 639                                 $warning .= '<li>' . wfMsgExt( 'fileexists-thumbnail-yes', 'parsemag', $dlink ) .
 640                                         '</li>' . $dlink2;
 641                         } else {
 642                                 # Image w/o '180px-' does not exists, but we do not like these filenames
 643                                 $warning .= '<li>' . wfMsgExt( 'file-thumbnail-no', 'parseinline' ,
 644                                         substr( $partname , 0, strpos( $partname , '-' ) +1 ) ) . '</li>';
 645                         }
 646                 }
 647
 648                 $filenamePrefixBlacklist = self::getFilenamePrefixBlacklist();
 649                 # Do the match
 650                 foreach( $filenamePrefixBlacklist as $prefix ) {
 651                         if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
 652                                 $warning .= '<li>' . wfMsgExt( 'filename-bad-prefix', 'parseinline', $prefix ) . '</li>';
 653                                 break;
 654                         }
 655                 }
 656
 657                 if ( $file->wasDeleted() && !$file->exists() ) {
 658                         # If the file existed before and was deleted, warn the user of this
 659                         # Don't bother doing so if the file exists now, however
 660                         $ltitle = SpecialPage::getTitleFor( 'Log' );
 661                         $llink = $sk->makeKnownLinkObj( $ltitle, wfMsgHtml( 'deletionlog' ),
 662                                 'type=delete&page=' . $file->getTitle()->getPrefixedUrl() );
 663                         $warning .= '<li>' . wfMsgWikiHtml( 'filewasdeleted', $llink ) . '</li>';
 664                 }
 665                 return $warning;
 666         }
 667
 668         /**
 669          * Get a list of warnings
 670          *
 671          * @param string local filename, e.g. 'file exists', 'non-descriptive filename'
 672          * @return array list of warning messages
 673          */
 674         static function ajaxGetExistsWarning( $filename ) {
 675                 $file = wfFindFile( $filename );
 676                 if( !$file ) {
 677                         // Force local file so we have an object to do further checks against
 678                         // if there isn't an exact match...
 679                         $file = wfLocalFile( $filename );
 680                 }
 681                 $s = '&nbsp;';
 682                 if ( $file ) {
 683                         $warning = self::getExistsWarning( $file );
 684                         if ( $warning !== '' ) {
 685                                 $s = "<ul>$warning</ul>";
 686                         }
 687                 }
 688                 return $s;
 689         }
 690
 691         /**
 692          * Render a preview of a given license for the AJAX preview on upload
 693          *
 694          * @param string $license
 695          * @return string
 696          */
 697         public static function ajaxGetLicensePreview( $license ) {
 698                 global $wgParser, $wgUser;
 699                 $text = '{{' . $license . '}}';
 700                 $title = Title::makeTitle( NS_IMAGE, 'Sample.jpg' );
 701                 $options = ParserOptions::newFromUser( $wgUser );
 702
 703                 // Expand subst: first, then live templates...
 704                 $text = $wgParser->preSaveTransform( $text, $title, $wgUser, $options );
 705                 $output = $wgParser->parse( $text, $title, $options );
 706
 707                 return $output->getText();
 708         }
 709
 710         /**
 711          * Get a list of blacklisted filename prefixes from [[MediaWiki:filename-prefix-blacklist]]
 712          *
 713          * @return array list of prefixes
 714          */
 715         public static function getFilenamePrefixBlacklist() {
 716                 $blacklist = array();
 717                 $message = wfMsgForContent( 'filename-prefix-blacklist' );
 718                 if( $message && !( wfEmptyMsg( 'filename-prefix-blacklist', $message ) || $message == '-' ) ) {
 719                         $lines = explode( "\n", $message );
 720                         foreach( $lines as $line ) {
 721                                 // Remove comment lines
 722                                 $comment = substr( trim( $line ), 0, 1 );
 723                                 if ( $comment == '#' || $comment == '' ) {
 724                                         continue;
 725                                 }
 726                                 // Remove additional comments after a prefix
 727                                 $comment = strpos( $line, '#' );
 728                                 if ( $comment > 0 ) {
 729                                         $line = substr( $line, 0, $comment-1 );
 730                                 }
 731                                 $blacklist[] = trim( $line );
 732                         }
 733                 }
 734                 return $blacklist;
 735         }
 736
 737         /**
 738          * Stash a file in a temporary directory for later processing
 739          * after the user has confirmed it.
 740          *
 741          * If the user doesn't explicitly cancel or accept, these files
 742          * can accumulate in the temp directory.
 743          *
 744          * @param string $saveName - the destination filename
 745          * @param string $tempName - the source temporary file to save
 746          * @return string - full path the stashed file, or false on failure
 747          * @access private
 748          */
 749         function saveTempUploadedFile( $saveName, $tempName ) {
 750                 global $wgOut;
 751                 $repo = RepoGroup::singleton()->getLocalRepo();
 752                 $status = $repo->storeTemp( $saveName, $tempName );
 753                 if ( !$status->isGood() ) {
 754                         $this->showError( $status->getWikiText() );
 755                         return false;
 756                 } else {
 757                         return $status->value;
 758                 }
 759         }
 760
 761         /**
 762          * Stash a file in a temporary directory for later processing,
 763          * and save the necessary descriptive info into the session.
 764          * Returns a key value which will be passed through a form
 765          * to pick up the path info on a later invocation.
 766          *
 767          * @return int
 768          * @access private
 769          */
 770         function stashSession() {
 771                 $stash = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath );
 772
 773                 if( !$stash ) {
 774                         # Couldn't save the file.
 775                         return false;
 776                 }
 777
 778                 $key = mt_rand( 0, 0x7fffffff );
 779                 $_SESSION['wsUploadData'][$key] = array(
 780                         'mTempPath'       => $stash,
 781                         'mFileSize'       => $this->mFileSize,
 782                         'mSrcName'        => $this->mSrcName,
 783                         'mFileProps'      => $this->mFileProps,
 784                         'version'         => self::SESSION_VERSION,
 785                 );
 786                 return $key;
 787         }
 788
 789         /**
 790          * Remove a temporarily kept file stashed by saveTempUploadedFile().
 791          * @access private
 792          * @return success
 793          */
 794         function unsaveUploadedFile() {
 795                 global $wgOut;
 796                 $repo = RepoGroup::singleton()->getLocalRepo();
 797                 $success = $repo->freeTemp( $this->mTempPath );
 798                 if ( ! $success ) {
 799                         $wgOut->showFileDeleteError( $this->mTempPath );
 800                         return false;
 801                 } else {
 802                         return true;
 803                 }
 804         }
 805
 806         /* -------------------------------------------------------------- */
 807
 808         /**
 809          * @param string $error as HTML
 810          * @access private
 811          */
 812         function uploadError( $error ) {
 813                 global $wgOut;
 814                 $wgOut->addHTML( "<h2>" . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 815                 $wgOut->addHTML( "<span class='error'>{$error}</span>\n" );
 816         }
 817
 818         /**
 819          * There's something wrong with this file, not enough to reject it
 820          * totally but we require manual intervention to save it for real.
 821          * Stash it away, then present a form asking to confirm or cancel.
 822          *
 823          * @param string $warning as HTML
 824          * @access private
 825          */
 826         function uploadWarning( $warning ) {
 827                 global $wgOut, $wgContLang;
 828                 global $wgUseCopyrightUpload;
 829
 830                 $this->mSessionKey = $this->stashSession();
 831                 if( !$this->mSessionKey ) {
 832                         # Couldn't save file; an error has been displayed so let's go.
 833                         return;
 834                 }
 835
 836                 $wgOut->addHTML( "<h2>" . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 837                 $wgOut->addHTML( "<ul class='warning'>{$warning}</ul><br />\n" );
 838
 839                 $save = wfMsgHtml( 'savefile' );
 840                 $reupload = wfMsgHtml( 'reupload' );
 841                 $iw = wfMsgWikiHtml( 'ignorewarning' );
 842                 $reup = wfMsgWikiHtml( 'reuploaddesc' );
 843                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
 844                 $action = $titleObj->escapeLocalURL( 'action=submit' );
 845                 $align1 = $wgContLang->isRTL() ? 'left' : 'right';
 846                 $align2 = $wgContLang->isRTL() ? 'right' : 'left';
 847
 848                 if ( $wgUseCopyrightUpload )
 849                 {
 850                         $copyright =  "
 851         <input type='hidden' name='wpUploadCopyStatus' value=\"" . htmlspecialchars( $this->mCopyrightStatus ) . "\" />
 852         <input type='hidden' name='wpUploadSource' value=\"" . htmlspecialchars( $this->mCopyrightSource ) . "\" />
 853         ";
 854                 } else {
 855                         $copyright = "";
 856                 }
 857
 858                 $wgOut->addHTML( "
 859         <form id='uploadwarning' method='post' enctype='multipart/form-data' action='$action'>
 860                 <input type='hidden' name='wpIgnoreWarning' value='1' />
 861                 <input type='hidden' name='wpSessionKey' value=\"" . htmlspecialchars( $this->mSessionKey ) . "\" />
 862                 <input type='hidden' name='wpUploadDescription' value=\"" . htmlspecialchars( $this->mComment ) . "\" />
 863                 <input type='hidden' name='wpLicense' value=\"" . htmlspecialchars( $this->mLicense ) . "\" />
 864                 <input type='hidden' name='wpDestFile' value=\"" . htmlspecialchars( $this->mDesiredDestName ) . "\" />
 865                 <input type='hidden' name='wpWatchthis' value=\"" . htmlspecialchars( intval( $this->mWatchthis ) ) . "\" />
 866         {$copyright}
 867         <table border='0'>
 868                 <tr>
 869                         <tr>
 870                                 <td align='$align1'>
 871                                         <input tabindex='2' type='submit' name='wpUpload' value=\"$save\" />
 872                                 </td>
 873                                 <td align='$align2'>$iw</td>
 874                         </tr>
 875                         <tr>
 876                                 <td align='$align1'>
 877                                         <input tabindex='2' type='submit' name='wpReUpload' value=\"{$reupload}\" />
 878                                 </td>
 879                                 <td align='$align2'>$reup</td>
 880                         </tr>
 881                 </tr>
 882         </table></form>\n" );
 883         }
 884
 885         /**
 886          * Displays the main upload form, optionally with a highlighted
 887          * error message up at the top.
 888          *
 889          * @param string $msg as HTML
 890          * @access private
 891          */
 892         function mainUploadForm( $msg='' ) {
 893                 global $wgOut, $wgUser, $wgContLang;
 894                 global $wgUseCopyrightUpload, $wgUseAjax, $wgAjaxUploadDestCheck, $wgAjaxLicensePreview;
 895                 global $wgRequest, $wgAllowCopyUploads;
 896                 global $wgStylePath, $wgStyleVersion;
 897
 898                 $useAjaxDestCheck = $wgUseAjax && $wgAjaxUploadDestCheck;
 899                 $useAjaxLicensePreview = $wgUseAjax && $wgAjaxLicensePreview;
 900
 901                 $adc = wfBoolToStr( $useAjaxDestCheck );
 902                 $alp = wfBoolToStr( $useAjaxLicensePreview );
 903
 904                 $wgOut->addScript( "<script type=\"text/javascript\">
 905 wgAjaxUploadDestCheck = {$adc};
 906 wgAjaxLicensePreview = {$alp};
 907 </script>
 908 <script type=\"text/javascript\" src=\"{$wgStylePath}/common/upload.js?{$wgStyleVersion}\"></script>
 909                 " );
 910
 911                 if( !wfRunHooks( 'UploadForm:initial', array( &$this ) ) )
 912                 {
 913                         wfDebug( "Hook 'UploadForm:initial' broke output of the upload form" );
 914                         return false;
 915                 }
 916
 917                 if( $this->mDesiredDestName ) {
 918                         $title = Title::makeTitleSafe( NS_IMAGE, $this->mDesiredDestName );
 919                         // Show a subtitle link to deleted revisions (to sysops et al only)
 920                         if( $title instanceof Title && ( $count = $title->isDeleted() ) > 0 && $wgUser->isAllowed( 'deletedhistory' ) ) {
 921                                 $link = wfMsgExt(
 922                                         $wgUser->isAllowed( 'delete' ) ? 'thisisdeleted' : 'viewdeleted',
 923                                         array( 'parse', 'replaceafter' ),
 924                                         $wgUser->getSkin()->makeKnownLinkObj(
 925                                                 SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedText() ),
 926                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $count )
 927                                         )
 928                                 );
 929                                 $wgOut->addHtml( "<div id=\"contentSub2\">{$link}</div>" );
 930                         }
 931
 932                         // Show the relevant lines from deletion log (for still deleted files only)
 933                         if( $title instanceof Title && $title->isDeleted() > 0 && !$title->exists() ) {
 934                                 $this->showDeletionLog( $wgOut, $title->getPrefixedText() );
 935                         }
 936                 }
 937
 938                 $cols = intval($wgUser->getOption( 'cols' ));
 939                 $ew = $wgUser->getOption( 'editwidth' );
 940                 if ( $ew ) $ew = " style=\"width:100%\"";
 941                 else $ew = '';
 942
 943                 if ( '' != $msg ) {
 944                         $sub = wfMsgHtml( 'uploaderror' );
 945                         $wgOut->addHTML( "<h2>{$sub}</h2>\n" .
 946                           "<span class='error'>{$msg}</span>\n" );
 947                 }
 948                 $wgOut->addHTML( '<div id="uploadtext">' );
 949                 $wgOut->addWikiText( wfMsgNoTrans( 'uploadtext', $this->mDesiredDestName ) );
 950                 $wgOut->addHTML( '</div>' );
 951
 952                 $sourcefilename = wfMsgHtml( 'sourcefilename' );
 953                 $destfilename = wfMsgHtml( 'destfilename' );
 954                 $summary = wfMsgExt( 'fileuploadsummary', 'parseinline' );
 955
 956                 $licenses = new Licenses();
 957                 $license = wfMsgExt( 'license', array( 'parseinline' ) );
 958                 $nolicense = wfMsgHtml( 'nolicense' );
 959                 $licenseshtml = $licenses->getHtml();
 960
 961                 $ulb = wfMsgHtml( 'uploadbtn' );
 962
 963
 964                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
 965                 $action = $titleObj->escapeLocalURL();
 966
 967                 $encDestName = htmlspecialchars( $this->mDesiredDestName );
 968
 969                 $watchChecked =
 970                         ( $wgUser->getOption( 'watchdefault' ) ||
 971                                 ( $wgUser->getOption( 'watchcreations' ) && $this->mDesiredDestName == '' ) )
 972                         ? 'checked="checked"'
 973                         : '';
 974                 $warningChecked = $this->mIgnoreWarning ? 'checked' : '';
 975
 976                 // Prepare form for upload or upload/copy
 977                 if( $wgAllowCopyUploads && $wgUser->isAllowed( 'upload_by_url' ) ) {
 978                         $filename_form =
 979                                 "<input type='radio' id='wpSourceTypeFile' name='wpSourceType' value='file' " .
 980                                    "onchange='toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\")' checked />" .
 981                                  "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
 982                                    "onfocus='" .
 983                                      "toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\");" .
 984                                      "toggle_element_check(\"wpSourceTypeFile\",\"wpSourceTypeURL\")'" .
 985                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") . "size='40' />" .
 986                                 wfMsgHTML( 'upload_source_file' ) . "<br/>" .
 987                                 "<input type='radio' id='wpSourceTypeURL' name='wpSourceType' value='web' " .
 988                                   "onchange='toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\")' />" .
 989                                 "<input tabindex='1' type='text' name='wpUploadFileURL' id='wpUploadFileURL' " .
 990                                   "onfocus='" .
 991                                     "toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\");" .
 992                                     "toggle_element_check(\"wpSourceTypeURL\",\"wpSourceTypeFile\")'" .
 993                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFileURL\")' ") . "size='40' DISABLED />" .
 994                                 wfMsgHtml( 'upload_source_url' ) ;
 995                 } else {
 996                         $filename_form =
 997                                 "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
 998                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") .
 999                                 "size='40' />" .
1000                                 "<input type='hidden' name='wpSourceType' value='file' />" ;
1001                 }
1002                 if ( $useAjaxDestCheck ) {
1003                         $warningRow = "<tr><td colspan='2' id='wpDestFile-warning'>&nbsp;</td></tr>";
1004                         $destOnkeyup = 'onkeyup="wgUploadWarningObj.keypress();"';
1005                 } else {
1006                         $warningRow = '';
1007                         $destOnkeyup = '';
1008                 }
1009
1010                 $encComment = htmlspecialchars( $this->mComment );
1011                 $align1 = $wgContLang->isRTL() ? 'left' : 'right';
1012                 $align2 = $wgContLang->isRTL() ? 'right' : 'left';
1013
1014                 $wgOut->addHTML( <<<EOT
1015         <form id='upload' method='post' enctype='multipart/form-data' action="$action">
1016                 <table border='0'>
1017                 <tr>
1018           {$this->uploadFormTextTop}
1019                         <td align='$align1' valign='top'><label for='wpUploadFile'>{$sourcefilename}:</label></td>
1020                         <td align='$align2'>
1021                                 {$filename_form}
1022                         </td>
1023                 </tr>
1024                 <tr>
1025                         <td align='$align1'><label for='wpDestFile'>{$destfilename}:</label></td>
1026                         <td align='$align2'>
1027                                 <input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='40'
1028                                         value="$encDestName" $destOnkeyup />
1029                         </td>
1030                 </tr>
1031                 <tr>
1032                         <td align='$align1'><label for='wpUploadDescription'>{$summary}</label></td>
1033                         <td align='$align2'>
1034                                 <textarea tabindex='3' name='wpUploadDescription' id='wpUploadDescription' rows='6'
1035                                         cols='{$cols}'{$ew}>$encComment</textarea>
1036            {$this->uploadFormTextAfterSummary}
1037                         </td>
1038                 </tr>
1039                 <tr>
1040 EOT
1041                 );
1042
1043                 if ( $licenseshtml != '' ) {
1044                         global $wgStylePath;
1045                         $wgOut->addHTML( "
1046                         <td align='$align1'><label for='wpLicense'>$license:</label></td>
1047                         <td align='$align2'>
1048                                 <select name='wpLicense' id='wpLicense' tabindex='4'
1049                                         onchange='licenseSelectorCheck()'>
1050                                         <option value=''>$nolicense</option>
1051                                         $licenseshtml
1052                                 </select>
1053                         </td>
1054                         </tr>
1055                         <tr>" );
1056                         if( $useAjaxLicensePreview ) {
1057                                 $wgOut->addHtml( "
1058                                         <td></td>
1059                                         <td id=\"mw-license-preview\"></td>
1060                                 </tr>
1061                                 <tr>" );
1062                         }
1063                 }
1064
1065                 if ( $wgUseCopyrightUpload ) {
1066                         $filestatus = wfMsgHtml ( 'filestatus' );
1067                         $copystatus =  htmlspecialchars( $this->mCopyrightStatus );
1068                         $filesource = wfMsgHtml ( 'filesource' );
1069                         $uploadsource = htmlspecialchars( $this->mCopyrightSource );
1070
1071                         $wgOut->addHTML( "
1072                                 <td align='$align1' nowrap='nowrap'><label for='wpUploadCopyStatus'>$filestatus:</label></td>
1073                                         <td><input tabindex='5' type='text' name='wpUploadCopyStatus' id='wpUploadCopyStatus'
1074                                           value=\"$copystatus\" size='40' /></td>
1075                         </tr>
1076                         <tr>
1077                                 <td align='$align1'><label for='wpUploadCopyStatus'>$filesource:</label></td>
1078                                         <td><input tabindex='6' type='text' name='wpUploadSource' id='wpUploadCopyStatus'
1079                                           value=\"$uploadsource\" size='40' /></td>
1080                         </tr>
1081                         <tr>
1082                 ");
1083                 }
1084
1085                 $wgOut->addHtml( "
1086                 <td></td>
1087                 <td>
1088                         <input tabindex='7' type='checkbox' name='wpWatchthis' id='wpWatchthis' $watchChecked value='true' />
1089                         <label for='wpWatchthis'>" . wfMsgHtml( 'watchthisupload' ) . "</label>
1090                         <input tabindex='8' type='checkbox' name='wpIgnoreWarning' id='wpIgnoreWarning' value='true' $warningChecked/>
1091                         <label for='wpIgnoreWarning'>" . wfMsgHtml( 'ignorewarnings' ) . "</label>
1092                 </td>
1093         </tr>
1094         $warningRow
1095         <tr>
1096                 <td></td>
1097                 <td align='$align2'><input tabindex='9' type='submit' name='wpUpload' value=\"{$ulb}\"" . $wgUser->getSkin()->tooltipAndAccesskey( 'upload' ) . " /></td>
1098         </tr>
1099         <tr>
1100                 <td></td>
1101                 <td align='$align2'>
1102                 " );
1103                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1104                 $wgOut->addHTML( "
1105                 </td>
1106         </tr>
1107
1108         </table>
1109         <input type='hidden' name='wpDestFileWarningAck' id='wpDestFileWarningAck' value=''/>
1110         </form>" );
1111         }
1112
1113         /* -------------------------------------------------------------- */
1114
1115         /**
1116          * Split a file into a base name and all dot-delimited 'extensions'
1117          * on the end. Some web server configurations will fall back to
1118          * earlier pseudo-'extensions' to determine type and execute
1119          * scripts, so the blacklist needs to check them all.
1120          *
1121          * @return array
1122          */
1123         function splitExtensions( $filename ) {
1124                 $bits = explode( '.', $filename );
1125                 $basename = array_shift( $bits );
1126                 return array( $basename, $bits );
1127         }
1128
1129         /**
1130          * Perform case-insensitive match against a list of file extensions.
1131          * Returns true if the extension is in the list.
1132          *
1133          * @param string $ext
1134          * @param array $list
1135          * @return bool
1136          */
1137         function checkFileExtension( $ext, $list ) {
1138                 return in_array( strtolower( $ext ), $list );
1139         }
1140
1141         /**
1142          * Perform case-insensitive match against a list of file extensions.
1143          * Returns true if any of the extensions are in the list.
1144          *
1145          * @param array $ext
1146          * @param array $list
1147          * @return bool
1148          */
1149         function checkFileExtensionList( $ext, $list ) {
1150                 foreach( $ext as $e ) {
1151                         if( in_array( strtolower( $e ), $list ) ) {
1152                                 return true;
1153                         }
1154                 }
1155                 return false;
1156         }
1157
1158         /**
1159          * Verifies that it's ok to include the uploaded file
1160          *
1161          * @param string $tmpfile the full path of the temporary file to verify
1162          * @param string $extension The filename extension that the file is to be served with
1163          * @return mixed true of the file is verified, a WikiError object otherwise.
1164          */
1165         function verify( $tmpfile, $extension ) {
1166                 #magically determine mime type
1167                 $magic=& MimeMagic::singleton();
1168                 $mime= $magic->guessMimeType($tmpfile,false);
1169
1170                 #check mime type, if desired
1171                 global $wgVerifyMimeType;
1172                 if ($wgVerifyMimeType) {
1173
1174                   wfDebug ( "\n\nmime: <$mime> extension: <$extension>\n\n");
1175                         #check mime type against file extension
1176                         if( !$this->verifyExtension( $mime, $extension ) ) {
1177                                 return new WikiErrorMsg( 'uploadcorrupt' );
1178                         }
1179
1180                         #check mime type blacklist
1181                         global $wgMimeTypeBlacklist;
1182                         if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist)
1183                                 && $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
1184                                 return new WikiErrorMsg( 'filetype-badmime', htmlspecialchars( $mime ) );
1185                         }
1186                 }
1187
1188                 #check for htmlish code and javascript
1189                 if( $this->detectScript ( $tmpfile, $mime, $extension ) ) {
1190                         return new WikiErrorMsg( 'uploadscripted' );
1191                 }
1192
1193                 /**
1194                 * Scan the uploaded file for viruses
1195                 */
1196                 $virus= $this->detectVirus($tmpfile);
1197                 if ( $virus ) {
1198                         return new WikiErrorMsg( 'uploadvirus', htmlspecialchars($virus) );
1199                 }
1200
1201                 wfDebug( __METHOD__.": all clear; passing.\n" );
1202                 return true;
1203         }
1204
1205         /**
1206          * Checks if the mime type of the uploaded file matches the file extension.
1207          *
1208          * @param string $mime the mime type of the uploaded file
1209          * @param string $extension The filename extension that the file is to be served with
1210          * @return bool
1211          */
1212         function verifyExtension( $mime, $extension ) {
1213                 $magic =& MimeMagic::singleton();
1214
1215                 if ( ! $mime || $mime == 'unknown' || $mime == 'unknown/unknown' )
1216                         if ( ! $magic->isRecognizableExtension( $extension ) ) {
1217                                 wfDebug( __METHOD__.": passing file with unknown detected mime type; " .
1218                                         "unrecognized extension '$extension', can't verify\n" );
1219                                 return true;
1220                         } else {
1221                                 wfDebug( __METHOD__.": rejecting file with unknown detected mime type; ".
1222                                         "recognized extension '$extension', so probably invalid file\n" );
1223                                 return false;
1224                         }
1225
1226                 $match= $magic->isMatchingExtension($extension,$mime);
1227
1228                 if ($match===NULL) {
1229                         wfDebug( __METHOD__.": no file extension known for mime type $mime, passing file\n" );
1230                         return true;
1231                 } elseif ($match===true) {
1232                         wfDebug( __METHOD__.": mime type $mime matches extension $extension, passing file\n" );
1233
1234                         #TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
1235                         return true;
1236
1237                 } else {
1238                         wfDebug( __METHOD__.": mime type $mime mismatches file extension $extension, rejecting file\n" );
1239                         return false;
1240                 }
1241         }
1242
1243         /**
1244          * Heuristic for detecting files that *could* contain JavaScript instructions or
1245          * things that may look like HTML to a browser and are thus
1246          * potentially harmful. The present implementation will produce false positives in some situations.
1247          *
1248          * @param string $file Pathname to the temporary upload file
1249          * @param string $mime The mime type of the file
1250          * @param string $extension The extension of the file
1251          * @return bool true if the file contains something looking like embedded scripts
1252          */
1253         function detectScript($file, $mime, $extension) {
1254                 global $wgAllowTitlesInSVG;
1255
1256                 #ugly hack: for text files, always look at the entire file.
1257                 #For binarie field, just check the first K.
1258
1259                 if (strpos($mime,'text/')===0) $chunk = file_get_contents( $file );
1260                 else {
1261                         $fp = fopen( $file, 'rb' );
1262                         $chunk = fread( $fp, 1024 );
1263                         fclose( $fp );
1264                 }
1265
1266                 $chunk= strtolower( $chunk );
1267
1268                 if (!$chunk) return false;
1269
1270                 #decode from UTF-16 if needed (could be used for obfuscation).
1271                 if (substr($chunk,0,2)=="\xfe\xff") $enc= "UTF-16BE";
1272                 elseif (substr($chunk,0,2)=="\xff\xfe") $enc= "UTF-16LE";
1273                 else $enc= NULL;
1274
1275                 if ($enc) $chunk= iconv($enc,"ASCII//IGNORE",$chunk);
1276
1277                 $chunk= trim($chunk);
1278
1279                 #FIXME: convert from UTF-16 if necessarry!
1280
1281                 wfDebug("SpecialUpload::detectScript: checking for embedded scripts and HTML stuff\n");
1282
1283                 #check for HTML doctype
1284                 if (eregi("<!DOCTYPE *X?HTML",$chunk)) return true;
1285
1286                 /**
1287                 * Internet Explorer for Windows performs some really stupid file type
1288                 * autodetection which can cause it to interpret valid image files as HTML
1289                 * and potentially execute JavaScript, creating a cross-site scripting
1290                 * attack vectors.
1291                 *
1292                 * Apple's Safari browser also performs some unsafe file type autodetection
1293                 * which can cause legitimate files to be interpreted as HTML if the
1294                 * web server is not correctly configured to send the right content-type
1295                 * (or if you're really uploading plain text and octet streams!)
1296                 *
1297                 * Returns true if IE is likely to mistake the given file for HTML.
1298                 * Also returns true if Safari would mistake the given file for HTML
1299                 * when served with a generic content-type.
1300                 */
1301
1302                 $tags = array(
1303                         '<body',
1304                         '<head',
1305                         '<html',   #also in safari
1306                         '<img',
1307                         '<pre',
1308                         '<script', #also in safari
1309                         '<table'
1310                         );
1311                 if( ! $wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
1312                         $tags[] = '<title';
1313                 }
1314
1315                 foreach( $tags as $tag ) {
1316                         if( false !== strpos( $chunk, $tag ) ) {
1317                                 return true;
1318                         }
1319                 }
1320
1321                 /*
1322                 * look for javascript
1323                 */
1324
1325                 #resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1326                 $chunk = Sanitizer::decodeCharReferences( $chunk );
1327
1328                 #look for script-types
1329                 if (preg_match('!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim',$chunk)) return true;
1330
1331                 #look for html-style script-urls
1332                 if (preg_match('!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1333
1334                 #look for css-style script-urls
1335                 if (preg_match('!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1336
1337                 wfDebug("SpecialUpload::detectScript: no scripts found\n");
1338                 return false;
1339         }
1340
1341         /**
1342          * Generic wrapper function for a virus scanner program.
1343          * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
1344          * $wgAntivirusRequired may be used to deny upload if the scan fails.
1345          *
1346          * @param string $file Pathname to the temporary upload file
1347          * @return mixed false if not virus is found, NULL if the scan fails or is disabled,
1348          *         or a string containing feedback from the virus scanner if a virus was found.
1349          *         If textual feedback is missing but a virus was found, this function returns true.
1350          */
1351         function detectVirus($file) {
1352                 global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
1353
1354                 if ( !$wgAntivirus ) {
1355                         wfDebug( __METHOD__.": virus scanner disabled\n");
1356                         return NULL;
1357                 }
1358
1359                 if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1360                         wfDebug( __METHOD__.": unknown virus scanner: $wgAntivirus\n" );
1361                         # @TODO: localise
1362                         $wgOut->addHTML( "<div class='error'>Bad configuration: unknown virus scanner: <i>$wgAntivirus</i></div>\n" );
1363                         return "unknown antivirus: $wgAntivirus";
1364                 }
1365
1366                 # look up scanner configuration
1367                 $command = $wgAntivirusSetup[$wgAntivirus]["command"];
1368                 $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]["codemap"];
1369                 $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]["messagepattern"] ) ?
1370                         $wgAntivirusSetup[$wgAntivirus]["messagepattern"] : null;
1371
1372                 if ( strpos( $command,"%f" ) === false ) {
1373                         # simple pattern: append file to scan
1374                         $command .= " " . wfEscapeShellArg( $file );
1375                 } else {
1376                         # complex pattern: replace "%f" with file to scan
1377                         $command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
1378                 }
1379
1380                 wfDebug( __METHOD__.": running virus scan: $command \n" );
1381
1382                 # execute virus scanner
1383                 $exitCode = false;
1384
1385                 #NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1386                 #      that does not seem to be worth the pain.
1387                 #      Ask me (Duesentrieb) about it if it's ever needed.
1388                 $output = array();
1389                 if ( wfIsWindows() ) {
1390                         exec( "$command", $output, $exitCode );
1391                 } else {
1392                         exec( "$command 2>&1", $output, $exitCode );
1393                 }
1394
1395                 # map exit code to AV_xxx constants.
1396                 $mappedCode = $exitCode;
1397                 if ( $exitCodeMap ) {
1398                         if ( isset( $exitCodeMap[$exitCode] ) ) {
1399                                 $mappedCode = $exitCodeMap[$exitCode];
1400                         } elseif ( isset( $exitCodeMap["*"] ) ) {
1401                                 $mappedCode = $exitCodeMap["*"];
1402                         }
1403                 }
1404
1405                 if ( $mappedCode === AV_SCAN_FAILED ) {
1406                         # scan failed (code was mapped to false by $exitCodeMap)
1407                         wfDebug( __METHOD__.": failed to scan $file (code $exitCode).\n" );
1408
1409                         if ( $wgAntivirusRequired ) {
1410                                 return "scan failed (code $exitCode)";
1411                         } else {
1412                                 return NULL;
1413                         }
1414                 } else if ( $mappedCode === AV_SCAN_ABORTED ) {
1415                         # scan failed because filetype is unknown (probably imune)
1416                         wfDebug( __METHOD__.": unsupported file type $file (code $exitCode).\n" );
1417                         return NULL;
1418                 } else if ( $mappedCode === AV_NO_VIRUS ) {
1419                         # no virus found
1420                         wfDebug( __METHOD__.": file passed virus scan.\n" );
1421                         return false;
1422                 } else {
1423                         $output = join( "\n", $output );
1424                         $output = trim( $output );
1425
1426                         if ( !$output ) {
1427                                 $output = true; #if there's no output, return true
1428                         } elseif ( $msgPattern ) {
1429                                 $groups = array();
1430                                 if ( preg_match( $msgPattern, $output, $groups ) ) {
1431                                         if ( $groups[1] ) {
1432                                                 $output = $groups[1];
1433                                         }
1434                                 }
1435                         }
1436
1437                         wfDebug( __METHOD__.": FOUND VIRUS! scanner feedback: $output" );
1438                         return $output;
1439                 }
1440         }
1441
1442         /**
1443          * Check if the temporary file is MacBinary-encoded, as some uploads
1444          * from Internet Explorer on Mac OS Classic and Mac OS X will be.
1445          * If so, the data fork will be extracted to a second temporary file,
1446          * which will then be checked for validity and either kept or discarded.
1447          *
1448          * @access private
1449          */
1450         function checkMacBinary() {
1451                 $macbin = new MacBinary( $this->mTempPath );
1452                 if( $macbin->isValid() ) {
1453                         $dataFile = tempnam( wfTempDir(), "WikiMacBinary" );
1454                         $dataHandle = fopen( $dataFile, 'wb' );
1455
1456                         wfDebug( "SpecialUpload::checkMacBinary: Extracting MacBinary data fork to $dataFile\n" );
1457                         $macbin->extractData( $dataHandle );
1458
1459                         $this->mTempPath = $dataFile;
1460                         $this->mFileSize = $macbin->dataForkLength();
1461
1462                         // We'll have to manually remove the new file if it's not kept.
1463                         $this->mRemoveTempFile = true;
1464                 }
1465                 $macbin->close();
1466         }
1467
1468         /**
1469          * If we've modified the upload file we need to manually remove it
1470          * on exit to clean up.
1471          * @access private
1472          */
1473         function cleanupTempFile() {
1474                 if ( $this->mRemoveTempFile && file_exists( $this->mTempPath ) ) {
1475                         wfDebug( "SpecialUpload::cleanupTempFile: Removing temporary file {$this->mTempPath}\n" );
1476                         unlink( $this->mTempPath );
1477                 }
1478         }
1479
1480         /**
1481          * Check if there's an overwrite conflict and, if so, if restrictions
1482          * forbid this user from performing the upload.
1483          *
1484          * @return mixed true on success, WikiError on failure
1485          * @access private
1486          */
1487         function checkOverwrite( $name ) {
1488                 $img = wfFindFile( $name );
1489
1490                 $error = '';
1491                 if( $img ) {
1492                         global $wgUser, $wgOut;
1493                         if( $img->isLocal() ) {
1494                                 if( !self::userCanReUpload( $wgUser, $img->name ) ) {
1495                                         $error = 'fileexists-forbidden';
1496                                 }
1497                         } else {
1498                                 if( !$wgUser->isAllowed( 'reupload' ) ||
1499                                     !$wgUser->isAllowed( 'reupload-shared' ) ) {
1500                                         $error = "fileexists-shared-forbidden";
1501                                 }
1502                         }
1503                 }
1504
1505                 if( $error ) {
1506                         $errorText = wfMsg( $error, wfEscapeWikiText( $img->getName() ) );
1507                         return $errorText;
1508                 }
1509
1510                 // Rockin', go ahead and upload
1511                 return true;
1512         }
1513
1514          /**
1515          * Check if a user is the last uploader
1516          *
1517          * @param User $user
1518          * @param string $img, image name
1519          * @return bool
1520          */
1521         public static function userCanReUpload( User $user, $img ) {
1522                 if( $user->isAllowed( 'reupload' ) )
1523                         return true; // non-conditional
1524                 if( !$user->isAllowed( 'reupload-own' ) )
1525                         return false;
1526
1527                 $dbr = wfGetDB( DB_SLAVE );
1528                 $row = $dbr->selectRow('image',
1529                 /* SELECT */ 'img_user',
1530                 /* WHERE */ array( 'img_name' => $img )
1531                 );
1532                 if ( !$row )
1533                         return false;
1534
1535                 return $user->getID() == $row->img_user;
1536         }
1537
1538         /**
1539          * Display an error with a wikitext description
1540          */
1541         function showError( $description ) {
1542                 global $wgOut;
1543                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
1544                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1545                 $wgOut->setArticleRelated( false );
1546                 $wgOut->enableClientCache( false );
1547                 $wgOut->addWikiText( $description );
1548         }
1549
1550         /**
1551          * Get the initial image page text based on a comment and optional file status information
1552          */
1553         static function getInitialPageText( $comment, $license, $copyStatus, $source ) {
1554                 global $wgUseCopyrightUpload;
1555                 if ( $wgUseCopyrightUpload ) {
1556                         if ( $license != '' ) {
1557                                 $licensetxt = '== ' . wfMsgForContent( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1558                         }
1559                         $pageText = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n" .
1560                           '== ' . wfMsgForContent ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
1561                           "$licensetxt" .
1562                           '== ' . wfMsgForContent ( 'filesource' ) . " ==\n" . $source ;
1563                 } else {
1564                         if ( $license != '' ) {
1565                                 $filedesc = $comment == '' ? '' : '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n";
1566                                  $pageText = $filedesc .
1567                                          '== ' . wfMsgForContent ( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1568                         } else {
1569                                 $pageText = $comment;
1570                         }
1571                 }
1572                 return $pageText;
1573         }
1574
1575         /**
1576          * If there are rows in the deletion log for this file, show them,
1577          * along with a nice little note for the user
1578          *
1579          * @param OutputPage $out
1580          * @param string filename
1581          */
1582         private function showDeletionLog( $out, $filename ) {
1583                 $reader = new LogReader(
1584                         new FauxRequest(
1585                                 array(
1586                                         'page' => $filename,
1587                                         'type' => 'delete',
1588                                         )
1589                         )
1590                 );
1591                 if( $reader->hasRows() ) {
1592                         $out->addHtml( '<div id="mw-upload-deleted-warn">' );
1593                         $out->addWikiText( wfMsg( 'upload-wasdeleted' ) );
1594                         $viewer = new LogViewer( $reader );
1595                         $viewer->showList( $out );
1596                         $out->addHtml( '</div>' );
1597                 }
1598         }
1599 }