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