diff options
Diffstat (limited to 'includes/SpecialUpload.php')
| -rw-r--r-- | includes/SpecialUpload.php | 1646 |
1 files changed, 0 insertions, 1646 deletions
diff --git a/includes/SpecialUpload.php b/includes/SpecialUpload.php deleted file mode 100644 index 36bae4f7..00000000 --- a/includes/SpecialUpload.php +++ /dev/null @@ -1,1646 +0,0 @@ -<?php -/** - * - * @addtogroup SpecialPage - */ - - -/** - * Entry point - */ -function wfSpecialUpload() { - global $wgRequest; - $form = new UploadForm( $wgRequest ); - $form->execute(); -} - -/** - * implements Special:Upload - * @addtogroup SpecialPage - */ -class UploadForm { - const SUCCESS = 0; - const BEFORE_PROCESSING = 1; - const LARGE_FILE_SERVER = 2; - const EMPTY_FILE = 3; - const MIN_LENGHT_PARTNAME = 4; - const ILLEGAL_FILENAME = 5; - const PROTECTED_PAGE = 6; - const OVERWRITE_EXISTING_FILE = 7; - const FILETYPE_MISSING = 8; - const FILETYPE_BADTYPE = 9; - const VERIFICATION_ERROR = 10; - const UPLOAD_VERIFICATION_ERROR = 11; - const UPLOAD_WARNING = 12; - const INTERNAL_ERROR = 13; - - /**#@+ - * @access private - */ - var $mComment, $mLicense, $mIgnoreWarning, $mCurlError; - var $mDestName, $mTempPath, $mFileSize, $mFileProps; - var $mCopyrightStatus, $mCopyrightSource, $mReUpload, $mAction, $mUploadClicked; - var $mSrcName, $mSessionKey, $mStashed, $mDesiredDestName, $mRemoveTempFile, $mSourceType; - var $mDestWarningAck, $mCurlDestHandle; - var $mLocalFile; - - # Placeholders for text injection by hooks (must be HTML) - # extensions should take care to _append_ to the present value - var $uploadFormTextTop; - var $uploadFormTextAfterSummary; - - const SESSION_VERSION = 1; - /**#@-*/ - - /** - * Constructor : initialise object - * Get data POSTed through the form and assign them to the object - * @param $request Data posted. - */ - function UploadForm( &$request ) { - global $wgAllowCopyUploads; - $this->mDesiredDestName = $request->getText( 'wpDestFile' ); - $this->mIgnoreWarning = $request->getCheck( 'wpIgnoreWarning' ); - $this->mComment = $request->getText( 'wpUploadDescription' ); - - if( !$request->wasPosted() ) { - # GET requests just give the main form; no data except destination - # filename and description - return; - } - - # Placeholders for text injection by hooks (empty per default) - $this->uploadFormTextTop = ""; - $this->uploadFormTextAfterSummary = ""; - - $this->mReUpload = $request->getCheck( 'wpReUpload' ); - $this->mUploadClicked = $request->getCheck( 'wpUpload' ); - - $this->mLicense = $request->getText( 'wpLicense' ); - $this->mCopyrightStatus = $request->getText( 'wpUploadCopyStatus' ); - $this->mCopyrightSource = $request->getText( 'wpUploadSource' ); - $this->mWatchthis = $request->getBool( 'wpWatchthis' ); - $this->mSourceType = $request->getText( 'wpSourceType' ); - $this->mDestWarningAck = $request->getText( 'wpDestFileWarningAck' ); - - $this->mAction = $request->getVal( 'action' ); - - $this->mSessionKey = $request->getInt( 'wpSessionKey' ); - if( !empty( $this->mSessionKey ) && - isset( $_SESSION['wsUploadData'][$this->mSessionKey]['version'] ) && - $_SESSION['wsUploadData'][$this->mSessionKey]['version'] == self::SESSION_VERSION ) { - /** - * Confirming a temporarily stashed upload. - * We don't want path names to be forged, so we keep - * them in the session on the server and just give - * an opaque key to the user agent. - */ - $data = $_SESSION['wsUploadData'][$this->mSessionKey]; - $this->mTempPath = $data['mTempPath']; - $this->mFileSize = $data['mFileSize']; - $this->mSrcName = $data['mSrcName']; - $this->mFileProps = $data['mFileProps']; - $this->mCurlError = 0/*UPLOAD_ERR_OK*/; - $this->mStashed = true; - $this->mRemoveTempFile = false; - } else { - /** - *Check for a newly uploaded file. - */ - if( $wgAllowCopyUploads && $this->mSourceType == 'web' ) { - $this->initializeFromUrl( $request ); - } else { - $this->initializeFromUpload( $request ); - } - } - } - - /** - * Initialize the uploaded file from PHP data - * @access private - */ - function initializeFromUpload( $request ) { - $this->mTempPath = $request->getFileTempName( 'wpUploadFile' ); - $this->mFileSize = $request->getFileSize( 'wpUploadFile' ); - $this->mSrcName = $request->getFileName( 'wpUploadFile' ); - $this->mCurlError = $request->getUploadError( 'wpUploadFile' ); - $this->mSessionKey = false; - $this->mStashed = false; - $this->mRemoveTempFile = false; // PHP will handle this - } - - /** - * Copy a web file to a temporary file - * @access private - */ - function initializeFromUrl( $request ) { - global $wgTmpDirectory; - $url = $request->getText( 'wpUploadFileURL' ); - $local_file = tempnam( $wgTmpDirectory, 'WEBUPLOAD' ); - - $this->mTempPath = $local_file; - $this->mFileSize = 0; # Will be set by curlCopy - $this->mCurlError = $this->curlCopy( $url, $local_file ); - $pathParts = explode( '/', $url ); - $this->mSrcName = array_pop( $pathParts ); - $this->mSessionKey = false; - $this->mStashed = false; - - // PHP won't auto-cleanup the file - $this->mRemoveTempFile = file_exists( $local_file ); - } - - /** - * Safe copy from URL - * Returns true if there was an error, false otherwise - */ - private function curlCopy( $url, $dest ) { - global $wgUser, $wgOut; - - if( !$wgUser->isAllowed( 'upload_by_url' ) ) { - $wgOut->permissionRequired( 'upload_by_url' ); - return true; - } - - # Maybe remove some pasting blanks :-) - $url = trim( $url ); - if( stripos($url, 'http://') !== 0 && stripos($url, 'ftp://') !== 0 ) { - # Only HTTP or FTP URLs - $wgOut->errorPage( 'upload-proto-error', 'upload-proto-error-text' ); - return true; - } - - # Open temporary file - $this->mCurlDestHandle = @fopen( $this->mTempPath, "wb" ); - if( $this->mCurlDestHandle === false ) { - # Could not open temporary file to write in - $wgOut->errorPage( 'upload-file-error', 'upload-file-error-text'); - return true; - } - - $ch = curl_init(); - curl_setopt( $ch, CURLOPT_HTTP_VERSION, 1.0); # Probably not needed, but apparently can work around some bug - curl_setopt( $ch, CURLOPT_TIMEOUT, 10); # 10 seconds timeout - curl_setopt( $ch, CURLOPT_LOW_SPEED_LIMIT, 512); # 0.5KB per second minimum transfer speed - curl_setopt( $ch, CURLOPT_URL, $url); - curl_setopt( $ch, CURLOPT_WRITEFUNCTION, array( $this, 'uploadCurlCallback' ) ); - curl_exec( $ch ); - $error = curl_errno( $ch ) ? true : false; - $errornum = curl_errno( $ch ); - // if ( $error ) print curl_error ( $ch ) ; # Debugging output - curl_close( $ch ); - - fclose( $this->mCurlDestHandle ); - unset( $this->mCurlDestHandle ); - if( $error ) { - unlink( $dest ); - if( wfEmptyMsg( "upload-curl-error$errornum", wfMsg("upload-curl-error$errornum") ) ) - $wgOut->errorPage( 'upload-misc-error', 'upload-misc-error-text' ); - else - $wgOut->errorPage( "upload-curl-error$errornum", "upload-curl-error$errornum-text" ); - } - - return $error; - } - - /** - * Callback function for CURL-based web transfer - * Write data to file unless we've passed the length limit; - * if so, abort immediately. - * @access private - */ - function uploadCurlCallback( $ch, $data ) { - global $wgMaxUploadSize; - $length = strlen( $data ); - $this->mFileSize += $length; - if( $this->mFileSize > $wgMaxUploadSize ) { - return 0; - } - fwrite( $this->mCurlDestHandle, $data ); - return $length; - } - - /** - * Start doing stuff - * @access public - */ - function execute() { - global $wgUser, $wgOut; - global $wgEnableUploads; - - # Check uploading enabled - if( !$wgEnableUploads ) { - $wgOut->showErrorPage( 'uploaddisabled', 'uploaddisabledtext', array( $this->mDesiredDestName ) ); - return; - } - - # Check permissions - if( !$wgUser->isAllowed( 'upload' ) ) { - if( !$wgUser->isLoggedIn() ) { - $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' ); - } else { - $wgOut->permissionRequired( 'upload' ); - } - return; - } - - # Check blocks - if( $wgUser->isBlocked() ) { - $wgOut->blockedPage(); - return; - } - - if( wfReadOnly() ) { - $wgOut->readOnlyPage(); - return; - } - - if( $this->mReUpload ) { - if( !$this->unsaveUploadedFile() ) { - return; - } - $this->mainUploadForm(); - } else if( 'submit' == $this->mAction || $this->mUploadClicked ) { - $this->processUpload(); - } else { - $this->mainUploadForm(); - } - - $this->cleanupTempFile(); - } - - /** - * Do the upload - * Checks are made in SpecialUpload::execute() - * - * @access private - */ - function processUpload(){ - global $wgUser, $wgOut, $wgFileExtensions; - $details = null; - $value = null; - $value = $this->internalProcessUpload( $details ); - - switch($value) { - case self::SUCCESS: - $wgOut->redirect( $this->mLocalFile->getTitle()->getFullURL() ); - break; - - case self::BEFORE_PROCESSING: - break; - - case self::LARGE_FILE_SERVER: - $this->mainUploadForm( wfMsgHtml( 'largefileserver' ) ); - break; - - case self::EMPTY_FILE: - $this->mainUploadForm( wfMsgHtml( 'emptyfile' ) ); - break; - - case self::MIN_LENGHT_PARTNAME: - $this->mainUploadForm( wfMsgHtml( 'minlength1' ) ); - break; - - case self::ILLEGAL_FILENAME: - $filtered = $details['filtered']; - $this->uploadError( wfMsgWikiHtml( 'illegalfilename', htmlspecialchars( $filtered ) ) ); - break; - - case self::PROTECTED_PAGE: - $this->uploadError( wfMsgWikiHtml( 'protectedpage' ) ); - break; - - case self::OVERWRITE_EXISTING_FILE: - $errorText = $details['overwrite']; - $overwrite = new WikiError( $wgOut->parse( $errorText ) ); - $this->uploadError( $overwrite->toString() ); - break; - - case self::FILETYPE_MISSING: - $this->uploadError( wfMsgExt( 'filetype-missing', array ( 'parseinline' ) ) ); - break; - - case self::FILETYPE_BADTYPE: - $finalExt = $details['finalExt']; - $this->uploadError( - wfMsgExt( 'filetype-banned-type', - array( 'parseinline' ), - htmlspecialchars( $finalExt ), - implode( - wfMsgExt( 'comma-separator', array( 'escapenoentities' ) ), - $wgFileExtensions - ) - ) - ); - break; - - case self::VERIFICATION_ERROR: - $veri = $details['veri']; - $this->uploadError( $veri->toString() ); - break; - - case self::UPLOAD_VERIFICATION_ERROR: - $error = $details['error']; - $this->uploadError( $error ); - break; - - case self::UPLOAD_WARNING: - $warning = $details['warning']; - $this->uploadWarning( $warning ); - break; - - case self::INTERNAL_ERROR: - $internal = $details['internal']; - $this->showError( $internal ); - break; - - default: - throw new MWException( __METHOD__ . ": Unknown value `{$value}`" ); - } - } - - /** - * Really do the upload - * Checks are made in SpecialUpload::execute() - * - * @param array $resultDetails contains result-specific dict of additional values - * - * @access private - */ - function internalProcessUpload( &$resultDetails ) { - global $wgUser; - - if( !wfRunHooks( 'UploadForm:BeforeProcessing', array( &$this ) ) ) - { - wfDebug( "Hook 'UploadForm:BeforeProcessing' broke processing the file." ); - return self::BEFORE_PROCESSING; - } - - /* Check for PHP error if any, requires php 4.2 or newer */ - if( $this->mCurlError == 1/*UPLOAD_ERR_INI_SIZE*/ ) { - return self::LARGE_FILE_SERVER; - } - - /** - * If there was no filename or a zero size given, give up quick. - */ - if( trim( $this->mSrcName ) == '' || empty( $this->mFileSize ) ) { - return self::EMPTY_FILE; - } - - # Chop off any directories in the given filename - if( $this->mDesiredDestName ) { - $basename = $this->mDesiredDestName; - } else { - $basename = $this->mSrcName; - } - $filtered = wfBaseName( $basename ); - - /** - * We'll want to blacklist against *any* 'extension', and use - * only the final one for the whitelist. - */ - list( $partname, $ext ) = $this->splitExtensions( $filtered ); - - if( count( $ext ) ) { - $finalExt = $ext[count( $ext ) - 1]; - } else { - $finalExt = ''; - } - - # If there was more than one "extension", reassemble the base - # filename to prevent bogus complaints about length - if( count( $ext ) > 1 ) { - for( $i = 0; $i < count( $ext ) - 1; $i++ ) - $partname .= '.' . $ext[$i]; - } - - if( strlen( $partname ) < 1 ) { - return self::MIN_LENGHT_PARTNAME; - } - - /** - * Filter out illegal characters, and try to make a legible name - * out of it. We'll strip some silently that Title would die on. - */ - $filtered = preg_replace ( "/[^".Title::legalChars()."]|:/", '-', $filtered ); - $nt = Title::makeTitleSafe( NS_IMAGE, $filtered ); - if( is_null( $nt ) ) { - $resultDetails = array( 'filtered' => $filtered ); - return self::ILLEGAL_FILENAME; - } - $this->mLocalFile = wfLocalFile( $nt ); - $this->mDestName = $this->mLocalFile->getName(); - - /** - * If the image is protected, non-sysop users won't be able - * to modify it by uploading a new revision. - */ - if( !$nt->userCan( 'edit' ) || !$nt->userCan( 'create' ) ) { - return self::PROTECTED_PAGE; - } - - /** - * In some cases we may forbid overwriting of existing files. - */ - $overwrite = $this->checkOverwrite( $this->mDestName ); - if( $overwrite !== true ) { - $resultDetails = array( 'overwrite' => $overwrite ); - return self::OVERWRITE_EXISTING_FILE; - } - - /* Don't allow users to override the blacklist (check file extension) */ - global $wgStrictFileExtensions; - global $wgFileExtensions, $wgFileBlacklist; - if ($finalExt == '') { - return self::FILETYPE_MISSING; - } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) || - ($wgStrictFileExtensions && !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) ) { - $resultDetails = array( 'finalExt' => $finalExt ); - return self::FILETYPE_BADTYPE; - } - - /** - * Look at the contents of the file; if we can recognize the - * type but it's corrupt or data of the wrong type, we should - * probably not accept it. - */ - if( !$this->mStashed ) { - $this->mFileProps = File::getPropsFromPath( $this->mTempPath, $finalExt ); - $this->checkMacBinary(); - $veri = $this->verify( $this->mTempPath, $finalExt ); - - if( $veri !== true ) { //it's a wiki error... - $resultDetails = array( 'veri' => $veri ); - return self::VERIFICATION_ERROR; - } - - /** - * Provide an opportunity for extensions to add further checks - */ - $error = ''; - if( !wfRunHooks( 'UploadVerification', - array( $this->mDestName, $this->mTempPath, &$error ) ) ) { - $resultDetails = array( 'error' => $error ); - return self::UPLOAD_VERIFICATION_ERROR; - } - } - - - /** - * Check for non-fatal conditions - */ - if ( ! $this->mIgnoreWarning ) { - $warning = ''; - - global $wgCapitalLinks; - if( $wgCapitalLinks ) { - $filtered = ucfirst( $filtered ); - } - if( $basename != $filtered ) { - $warning .= '<li>'.wfMsgHtml( 'badfilename', htmlspecialchars( $this->mDestName ) ).'</li>'; - } - - global $wgCheckFileExtensions; - if ( $wgCheckFileExtensions ) { - if ( !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) { - $warning .= '<li>' . - wfMsgExt( 'filetype-unwanted-type', - array( 'parseinline' ), - htmlspecialchars( $finalExt ), - implode( - wfMsgExt( 'comma-separator', array( 'escapenoentities' ) ), - $wgFileExtensions - ) - ) . '</li>'; - } - } - - global $wgUploadSizeWarning; - if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) { - $skin = $wgUser->getSkin(); - $wsize = $skin->formatSize( $wgUploadSizeWarning ); - $asize = $skin->formatSize( $this->mFileSize ); - $warning .= '<li>' . wfMsgHtml( 'large-file', $wsize, $asize ) . '</li>'; - } - if ( $this->mFileSize == 0 ) { - $warning .= '<li>'.wfMsgHtml( 'emptyfile' ).'</li>'; - } - - if ( !$this->mDestWarningAck ) { - $warning .= self::getExistsWarning( $this->mLocalFile ); - } - if( $warning != '' ) { - /** - * Stash the file in a temporary location; the user can choose - * to let it through and we'll complete the upload then. - */ - $resultDetails = array( 'warning' => $warning ); - return self::UPLOAD_WARNING; - } - } - - /** - * Try actually saving the thing... - * It will show an error form on failure. - */ - $pageText = self::getInitialPageText( $this->mComment, $this->mLicense, - $this->mCopyrightStatus, $this->mCopyrightSource ); - - $status = $this->mLocalFile->upload( $this->mTempPath, $this->mComment, $pageText, - File::DELETE_SOURCE, $this->mFileProps ); - if ( !$status->isGood() ) { - $resultDetails = array( 'internal' => $status->getWikiText() ); - return self::INTERNAL_ERROR; - } else { - if ( $this->mWatchthis ) { - global $wgUser; - $wgUser->addWatch( $this->mLocalFile->getTitle() ); - } - // Success, redirect to description page - $img = null; // @todo: added to avoid passing a ref to null - should this be defined somewhere? - wfRunHooks( 'UploadComplete', array( &$this ) ); - return self::SUCCESS; - } - } - - /** - * Do existence checks on a file and produce a warning - * This check is static and can be done pre-upload via AJAX - * Returns an HTML fragment consisting of one or more LI elements if there is a warning - * Returns an empty string if there is no warning - */ - static function getExistsWarning( $file ) { - global $wgUser, $wgContLang; - // Check for uppercase extension. We allow these filenames but check if an image - // with lowercase extension exists already - $warning = ''; - $align = $wgContLang->isRtl() ? 'left' : 'right'; - - if( strpos( $file->getName(), '.' ) == false ) { - $partname = $file->getName(); - $rawExtension = ''; - } else { - list( $partname, $rawExtension ) = explode( '.', $file->getName(), 2 ); - } - $sk = $wgUser->getSkin(); - - if ( $rawExtension != $file->getExtension() ) { - // We're not using the normalized form of the extension. - // Normal form is lowercase, using most common of alternate - // extensions (eg 'jpg' rather than 'JPEG'). - // - // Check for another file using the normalized form... - $nt_lc = Title::newFromText( $partname . '.' . $file->getExtension() ); - $file_lc = wfLocalFile( $nt_lc ); - } else { - $file_lc = false; - } - - if( $file->exists() ) { - $dlink = $sk->makeKnownLinkObj( $file->getTitle() ); - if ( $file->allowInlineDisplay() ) { - $dlink2 = $sk->makeImageLinkObj( $file->getTitle(), wfMsgExt( 'fileexists-thumb', 'parseinline' ), - $file->getName(), $align, array(), false, true ); - } elseif ( !$file->allowInlineDisplay() && $file->isSafeFile() ) { - $icon = $file->iconThumb(); - $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' . - $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>'; - } else { - $dlink2 = ''; - } - - $warning .= '<li>' . wfMsgExt( 'fileexists', array(), $dlink ) . '</li>' . $dlink2; - - } elseif( $file->getTitle()->getArticleID() ) { - $lnk = $sk->makeKnownLinkObj( $file->getTitle(), '', 'redirect=no' ); - $warning .= '<li>' . wfMsgExt( 'filepageexists', array(), $lnk ) . '</li>'; - } elseif ( $file_lc && $file_lc->exists() ) { - # Check if image with lowercase extension exists. - # It's not forbidden but in 99% it makes no sense to upload the same filename with uppercase extension - $dlink = $sk->makeKnownLinkObj( $nt_lc ); - if ( $file_lc->allowInlineDisplay() ) { - $dlink2 = $sk->makeImageLinkObj( $nt_lc, wfMsgExt( 'fileexists-thumb', 'parseinline' ), - $nt_lc->getText(), $align, array(), false, true ); - } elseif ( !$file_lc->allowInlineDisplay() && $file_lc->isSafeFile() ) { - $icon = $file_lc->iconThumb(); - $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' . - $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>'; - } else { - $dlink2 = ''; - } - - $warning .= '<li>' . wfMsgExt( 'fileexists-extension', 'parsemag', $file->getName(), $dlink ) . '</li>' . $dlink2; - - } elseif ( ( substr( $partname , 3, 3 ) == 'px-' || substr( $partname , 2, 3 ) == 'px-' ) - && ereg( "[0-9]{2}" , substr( $partname , 0, 2) ) ) - { - # Check for filenames like 50px- or 180px-, these are mostly thumbnails - $nt_thb = Title::newFromText( substr( $partname , strpos( $partname , '-' ) +1 ) . '.' . $rawExtension ); - $file_thb = wfLocalFile( $nt_thb ); - if ($file_thb->exists() ) { - # Check if an image without leading '180px-' (or similiar) exists - $dlink = $sk->makeKnownLinkObj( $nt_thb); - if ( $file_thb->allowInlineDisplay() ) { - $dlink2 = $sk->makeImageLinkObj( $nt_thb, - wfMsgExt( 'fileexists-thumb', 'parseinline' ), - $nt_thb->getText(), $align, array(), false, true ); - } elseif ( !$file_thb->allowInlineDisplay() && $file_thb->isSafeFile() ) { - $icon = $file_thb->iconThumb(); - $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' . - $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . - $dlink . '</div>'; - } else { - $dlink2 = ''; - } - - $warning .= '<li>' . wfMsgExt( 'fileexists-thumbnail-yes', 'parsemag', $dlink ) . - '</li>' . $dlink2; - } else { - # Image w/o '180px-' does not exists, but we do not like these filenames - $warning .= '<li>' . wfMsgExt( 'file-thumbnail-no', 'parseinline' , - substr( $partname , 0, strpos( $partname , '-' ) +1 ) ) . '</li>'; - } - } - - $filenamePrefixBlacklist = self::getFilenamePrefixBlacklist(); - # Do the match - foreach( $filenamePrefixBlacklist as $prefix ) { - if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) { - $warning .= '<li>' . wfMsgExt( 'filename-bad-prefix', 'parseinline', $prefix ) . '</li>'; - break; - } - } - - if ( $file->wasDeleted() && !$file->exists() ) { - # If the file existed before and was deleted, warn the user of this - # Don't bother doing so if the file exists now, however - $ltitle = SpecialPage::getTitleFor( 'Log' ); - $llink = $sk->makeKnownLinkObj( $ltitle, wfMsgHtml( 'deletionlog' ), - 'type=delete&page=' . $file->getTitle()->getPrefixedUrl() ); - $warning .= '<li>' . wfMsgWikiHtml( 'filewasdeleted', $llink ) . '</li>'; - } - return $warning; - } - - /** - * Get a list of warnings - * - * @param string local filename, e.g. 'file exists', 'non-descriptive filename' - * @return array list of warning messages - */ - static function ajaxGetExistsWarning( $filename ) { - $file = wfFindFile( $filename ); - if( !$file ) { - // Force local file so we have an object to do further checks against - // if there isn't an exact match... - $file = wfLocalFile( $filename ); - } - $s = ' '; - if ( $file ) { - $warning = self::getExistsWarning( $file ); - if ( $warning !== '' ) { - $s = "<ul>$warning</ul>"; - } - } - return $s; - } - - /** - * Render a preview of a given license for the AJAX preview on upload - * - * @param string $license - * @return string - */ - public static function ajaxGetLicensePreview( $license ) { - global $wgParser, $wgUser; - $text = '{{' . $license . '}}'; - $title = Title::makeTitle( NS_IMAGE, 'Sample.jpg' ); - $options = ParserOptions::newFromUser( $wgUser ); - - // Expand subst: first, then live templates... - $text = $wgParser->preSaveTransform( $text, $title, $wgUser, $options ); - $output = $wgParser->parse( $text, $title, $options ); - - return $output->getText(); - } - - /** - * Get a list of blacklisted filename prefixes from [[MediaWiki:filename-prefix-blacklist]] - * - * @return array list of prefixes - */ - public static function getFilenamePrefixBlacklist() { - $blacklist = array(); - $message = wfMsgForContent( 'filename-prefix-blacklist' ); - if( $message && !( wfEmptyMsg( 'filename-prefix-blacklist', $message ) || $message == '-' ) ) { - $lines = explode( "\n", $message ); - foreach( $lines as $line ) { - // Remove comment lines - $comment = substr( trim( $line ), 0, 1 ); - if ( $comment == '#' || $comment == '' ) { - continue; - } - // Remove additional comments after a prefix - $comment = strpos( $line, '#' ); - if ( $comment > 0 ) { - $line = substr( $line, 0, $comment-1 ); - } - $blacklist[] = trim( $line ); - } - } - return $blacklist; - } - - /** - * Stash a file in a temporary directory for later processing - * after the user has confirmed it. - * - * If the user doesn't explicitly cancel or accept, these files - * can accumulate in the temp directory. - * - * @param string $saveName - the destination filename - * @param string $tempName - the source temporary file to save - * @return string - full path the stashed file, or false on failure - * @access private - */ - function saveTempUploadedFile( $saveName, $tempName ) { - global $wgOut; - $repo = RepoGroup::singleton()->getLocalRepo(); - $status = $repo->storeTemp( $saveName, $tempName ); - if ( !$status->isGood() ) { - $this->showError( $status->getWikiText() ); - return false; - } else { - return $status->value; - } - } - - /** - * Stash a file in a temporary directory for later processing, - * and save the necessary descriptive info into the session. - * Returns a key value which will be passed through a form - * to pick up the path info on a later invocation. - * - * @return int - * @access private - */ - function stashSession() { - $stash = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath ); - - if( !$stash ) { - # Couldn't save the file. - return false; - } - - $key = mt_rand( 0, 0x7fffffff ); - $_SESSION['wsUploadData'][$key] = array( - 'mTempPath' => $stash, - 'mFileSize' => $this->mFileSize, - 'mSrcName' => $this->mSrcName, - 'mFileProps' => $this->mFileProps, - 'version' => self::SESSION_VERSION, - ); - return $key; - } - - /** - * Remove a temporarily kept file stashed by saveTempUploadedFile(). - * @access private - * @return success - */ - function unsaveUploadedFile() { - global $wgOut; - $repo = RepoGroup::singleton()->getLocalRepo(); - $success = $repo->freeTemp( $this->mTempPath ); - if ( ! $success ) { - $wgOut->showFileDeleteError( $this->mTempPath ); - return false; - } else { - return true; - } - } - - /* -------------------------------------------------------------- */ - - /** - * @param string $error as HTML - * @access private - */ - function uploadError( $error ) { - global $wgOut; - $wgOut->addHTML( "<h2>" . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" ); - $wgOut->addHTML( "<span class='error'>{$error}</span>\n" ); - } - - /** - * There's something wrong with this file, not enough to reject it - * totally but we require manual intervention to save it for real. - * Stash it away, then present a form asking to confirm or cancel. - * - * @param string $warning as HTML - * @access private - */ - function uploadWarning( $warning ) { - global $wgOut, $wgContLang; - global $wgUseCopyrightUpload; - - $this->mSessionKey = $this->stashSession(); - if( !$this->mSessionKey ) { - # Couldn't save file; an error has been displayed so let's go. - return; - } - - $wgOut->addHTML( "<h2>" . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" ); - $wgOut->addHTML( "<ul class='warning'>{$warning}</ul><br />\n" ); - - $save = wfMsgHtml( 'savefile' ); - $reupload = wfMsgHtml( 'reupload' ); - $iw = wfMsgWikiHtml( 'ignorewarning' ); - $reup = wfMsgWikiHtml( 'reuploaddesc' ); - $titleObj = SpecialPage::getTitleFor( 'Upload' ); - $action = $titleObj->escapeLocalURL( 'action=submit' ); - $align1 = $wgContLang->isRTL() ? 'left' : 'right'; - $align2 = $wgContLang->isRTL() ? 'right' : 'left'; - - if ( $wgUseCopyrightUpload ) - { - $copyright = " - <input type='hidden' name='wpUploadCopyStatus' value=\"" . htmlspecialchars( $this->mCopyrightStatus ) . "\" /> - <input type='hidden' name='wpUploadSource' value=\"" . htmlspecialchars( $this->mCopyrightSource ) . "\" /> - "; - } else { - $copyright = ""; - } - - $wgOut->addHTML( " - <form id='uploadwarning' method='post' enctype='multipart/form-data' action='$action'> - <input type='hidden' name='wpIgnoreWarning' value='1' /> - <input type='hidden' name='wpSessionKey' value=\"" . htmlspecialchars( $this->mSessionKey ) . "\" /> - <input type='hidden' name='wpUploadDescription' value=\"" . htmlspecialchars( $this->mComment ) . "\" /> - <input type='hidden' name='wpLicense' value=\"" . htmlspecialchars( $this->mLicense ) . "\" /> - <input type='hidden' name='wpDestFile' value=\"" . htmlspecialchars( $this->mDesiredDestName ) . "\" /> - <input type='hidden' name='wpWatchthis' value=\"" . htmlspecialchars( intval( $this->mWatchthis ) ) . "\" /> - {$copyright} - <table border='0'> - <tr> - <tr> - <td align='$align1'> - <input tabindex='2' type='submit' name='wpUpload' value=\"$save\" /> - </td> - <td align='$align2'>$iw</td> - </tr> - <tr> - <td align='$align1'> - <input tabindex='2' type='submit' name='wpReUpload' value=\"{$reupload}\" /> - </td> - <td align='$align2'>$reup</td> - </tr> - </tr> - </table></form>\n" ); - } - - /** - * Displays the main upload form, optionally with a highlighted - * error message up at the top. - * - * @param string $msg as HTML - * @access private - */ - function mainUploadForm( $msg='' ) { - global $wgOut, $wgUser, $wgContLang; - global $wgUseCopyrightUpload, $wgUseAjax, $wgAjaxUploadDestCheck, $wgAjaxLicensePreview; - global $wgRequest, $wgAllowCopyUploads; - global $wgStylePath, $wgStyleVersion; - - $useAjaxDestCheck = $wgUseAjax && $wgAjaxUploadDestCheck; - $useAjaxLicensePreview = $wgUseAjax && $wgAjaxLicensePreview; - - $adc = wfBoolToStr( $useAjaxDestCheck ); - $alp = wfBoolToStr( $useAjaxLicensePreview ); - - $wgOut->addScript( "<script type=\"text/javascript\"> -wgAjaxUploadDestCheck = {$adc}; -wgAjaxLicensePreview = {$alp}; -</script> -<script type=\"text/javascript\" src=\"{$wgStylePath}/common/upload.js?{$wgStyleVersion}\"></script> - " ); - - if( !wfRunHooks( 'UploadForm:initial', array( &$this ) ) ) - { - wfDebug( "Hook 'UploadForm:initial' broke output of the upload form" ); - return false; - } - - if( $this->mDesiredDestName ) { - $title = Title::makeTitleSafe( NS_IMAGE, $this->mDesiredDestName ); - // Show a subtitle link to deleted revisions (to sysops et al only) - if( $title instanceof Title && ( $count = $title->isDeleted() ) > 0 && $wgUser->isAllowed( 'deletedhistory' ) ) { - $link = wfMsgExt( - $wgUser->isAllowed( 'delete' ) ? 'thisisdeleted' : 'viewdeleted', - array( 'parse', 'replaceafter' ), - $wgUser->getSkin()->makeKnownLinkObj( - SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedText() ), - wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $count ) - ) - ); - $wgOut->addHtml( "<div id=\"contentSub2\">{$link}</div>" ); - } - - // Show the relevant lines from deletion log (for still deleted files only) - if( $title instanceof Title && $title->isDeleted() > 0 && !$title->exists() ) { - $this->showDeletionLog( $wgOut, $title->getPrefixedText() ); - } - } - - $cols = intval($wgUser->getOption( 'cols' )); - - if( $wgUser->getOption( 'editwidth' ) ) { - $width = " style=\"width:100%\""; - } else { - $width = ''; - } - - if ( '' != $msg ) { - $sub = wfMsgHtml( 'uploaderror' ); - $wgOut->addHTML( "<h2>{$sub}</h2>\n" . - "<span class='error'>{$msg}</span>\n" ); - } - $wgOut->addHTML( '<div id="uploadtext">' ); - $wgOut->addWikiMsg( 'uploadtext', $this->mDesiredDestName ); - $wgOut->addHTML( "</div>\n" ); - - # Print a list of allowed file extensions, if so configured. We ignore - # MIME type here, it's incomprehensible to most people and too long. - global $wgCheckFileExtensions, $wgStrictFileExtensions, - $wgFileExtensions, $wgFileBlacklist; - if( $wgCheckFileExtensions ) { - $delim = wfMsgExt( 'comma-separator', array( 'escapenoentities' ) ); - if( $wgStrictFileExtensions ) { - # Everything not permitted is banned - $wgOut->addHTML( - '<div id="mw-upload-permitted">' . - wfMsgWikiHtml( 'upload-permitted', implode( $wgFileExtensions, $delim ) ) . - "</div>\n" - ); - } else { - # We have to list both preferred and prohibited - $wgOut->addHTML( - '<div id="mw-upload-preferred">' . - wfMsgWikiHtml( 'upload-preferred', implode( $wgFileExtensions, $delim ) ) . - "</div>\n" . - '<div id="mw-upload-prohibited">' . - wfMsgWikiHtml( 'upload-prohibited', implode( $wgFileBlacklist, $delim ) ) . - "</div>\n" - ); - } - } - - $sourcefilename = wfMsgHtml( 'sourcefilename' ); - $destfilename = wfMsgHtml( 'destfilename' ); - $summary = wfMsgExt( 'fileuploadsummary', 'parseinline' ); - - $licenses = new Licenses(); - $license = wfMsgExt( 'license', array( 'parseinline' ) ); - $nolicense = wfMsgHtml( 'nolicense' ); - $licenseshtml = $licenses->getHtml(); - - $ulb = wfMsgHtml( 'uploadbtn' ); - - - $titleObj = SpecialPage::getTitleFor( 'Upload' ); - $action = $titleObj->escapeLocalURL(); - - $encDestName = htmlspecialchars( $this->mDesiredDestName ); - - $watchChecked = - ( $wgUser->getOption( 'watchdefault' ) || - ( $wgUser->getOption( 'watchcreations' ) && $this->mDesiredDestName == '' ) ) - ? 'checked="checked"' - : ''; - $warningChecked = $this->mIgnoreWarning ? 'checked' : ''; - - // Prepare form for upload or upload/copy - if( $wgAllowCopyUploads && $wgUser->isAllowed( 'upload_by_url' ) ) { - $filename_form = - "<input type='radio' id='wpSourceTypeFile' name='wpSourceType' value='file' " . - "onchange='toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\")' checked />" . - "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " . - "onfocus='" . - "toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\");" . - "toggle_element_check(\"wpSourceTypeFile\",\"wpSourceTypeURL\")'" . - ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") . "size='40' />" . - wfMsgHTML( 'upload_source_file' ) . "<br/>" . - "<input type='radio' id='wpSourceTypeURL' name='wpSourceType' value='web' " . - "onchange='toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\")' />" . - "<input tabindex='1' type='text' name='wpUploadFileURL' id='wpUploadFileURL' " . - "onfocus='" . - "toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\");" . - "toggle_element_check(\"wpSourceTypeURL\",\"wpSourceTypeFile\")'" . - ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFileURL\")' ") . "size='40' DISABLED />" . - wfMsgHtml( 'upload_source_url' ) ; - } else { - $filename_form = - "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " . - ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") . - "size='40' />" . - "<input type='hidden' name='wpSourceType' value='file' />" ; - } - if ( $useAjaxDestCheck ) { - $warningRow = "<tr><td colspan='2' id='wpDestFile-warning'> </td></tr>"; - $destOnkeyup = 'onkeyup="wgUploadWarningObj.keypress();"'; - } else { - $warningRow = ''; - $destOnkeyup = ''; - } - - $encComment = htmlspecialchars( $this->mComment ); - $align1 = $wgContLang->isRTL() ? 'left' : 'right'; - $align2 = $wgContLang->isRTL() ? 'right' : 'left'; - - $wgOut->addHTML( <<<EOT - <form id='upload' method='post' enctype='multipart/form-data' action="$action"> - <table border='0'> - <tr> - {$this->uploadFormTextTop} - <td align='$align1' valign='top'><label for='wpUploadFile'>{$sourcefilename}:</label></td> - <td align='$align2'> - {$filename_form} - </td> - </tr> - <tr> - <td align='$align1'><label for='wpDestFile'>{$destfilename}:</label></td> - <td align='$align2'> - <input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='40' - value="$encDestName" $destOnkeyup /> - </td> - </tr> - <tr> - <td align='$align1'><label for='wpUploadDescription'>{$summary}</label></td> - <td align='$align2'> - <textarea tabindex='3' name='wpUploadDescription' id='wpUploadDescription' rows='6' - cols='{$cols}'{$width}>$encComment</textarea> - {$this->uploadFormTextAfterSummary} - </td> - </tr> - <tr> -EOT - ); - - if ( $licenseshtml != '' ) { - global $wgStylePath; - $wgOut->addHTML( " - <td align='$align1'><label for='wpLicense'>$license:</label></td> - <td align='$align2'> - <select name='wpLicense' id='wpLicense' tabindex='4' - onchange='licenseSelectorCheck()'> - <option value=''>$nolicense</option> - $licenseshtml - </select> - </td> - </tr> - <tr>" ); - if( $useAjaxLicensePreview ) { - $wgOut->addHtml( " - <td></td> - <td id=\"mw-license-preview\"></td> - </tr> - <tr>" ); - } - } - - if ( $wgUseCopyrightUpload ) { - $filestatus = wfMsgHtml ( 'filestatus' ); - $copystatus = htmlspecialchars( $this->mCopyrightStatus ); - $filesource = wfMsgHtml ( 'filesource' ); - $uploadsource = htmlspecialchars( $this->mCopyrightSource ); - - $wgOut->addHTML( " - <td align='$align1' nowrap='nowrap'><label for='wpUploadCopyStatus'>$filestatus:</label></td> - <td><input tabindex='5' type='text' name='wpUploadCopyStatus' id='wpUploadCopyStatus' - value=\"$copystatus\" size='40' /></td> - </tr> - <tr> - <td align='$align1'><label for='wpUploadCopyStatus'>$filesource:</label></td> - <td><input tabindex='6' type='text' name='wpUploadSource' id='wpUploadCopyStatus' - value=\"$uploadsource\" size='40' /></td> - </tr> - <tr> - "); - } - - $wgOut->addHtml( " - <td></td> - <td> - <input tabindex='7' type='checkbox' name='wpWatchthis' id='wpWatchthis' $watchChecked value='true' /> - <label for='wpWatchthis'>" . wfMsgHtml( 'watchthisupload' ) . "</label> - <input tabindex='8' type='checkbox' name='wpIgnoreWarning' id='wpIgnoreWarning' value='true' $warningChecked/> - <label for='wpIgnoreWarning'>" . wfMsgHtml( 'ignorewarnings' ) . "</label> - </td> - </tr> - $warningRow - <tr> - <td></td> - <td align='$align2'><input tabindex='9' type='submit' name='wpUpload' value=\"{$ulb}\"" . $wgUser->getSkin()->tooltipAndAccesskey( 'upload' ) . " /></td> - </tr> - <tr> - <td></td> - <td align='$align2'> - " ); - $wgOut->addWikiText( wfMsgForContent( 'edittools' ) ); - $wgOut->addHTML( " - </td> - </tr> - - </table> - <input type='hidden' name='wpDestFileWarningAck' id='wpDestFileWarningAck' value=''/> - </form>" ); - } - - /* -------------------------------------------------------------- */ - - /** - * Split a file into a base name and all dot-delimited 'extensions' - * on the end. Some web server configurations will fall back to - * earlier pseudo-'extensions' to determine type and execute - * scripts, so the blacklist needs to check them all. - * - * @return array - */ - function splitExtensions( $filename ) { - $bits = explode( '.', $filename ); - $basename = array_shift( $bits ); - return array( $basename, $bits ); - } - - /** - * Perform case-insensitive match against a list of file extensions. - * Returns true if the extension is in the list. - * - * @param string $ext - * @param array $list - * @return bool - */ - function checkFileExtension( $ext, $list ) { - return in_array( strtolower( $ext ), $list ); - } - - /** - * Perform case-insensitive match against a list of file extensions. - * Returns true if any of the extensions are in the list. - * - * @param array $ext - * @param array $list - * @return bool - */ - function checkFileExtensionList( $ext, $list ) { - foreach( $ext as $e ) { - if( in_array( strtolower( $e ), $list ) ) { - return true; - } - } - return false; - } - - /** - * Verifies that it's ok to include the uploaded file - * - * @param string $tmpfile the full path of the temporary file to verify - * @param string $extension The filename extension that the file is to be served with - * @return mixed true of the file is verified, a WikiError object otherwise. - */ - function verify( $tmpfile, $extension ) { - #magically determine mime type - $magic=& MimeMagic::singleton(); - $mime= $magic->guessMimeType($tmpfile,false); - - #check mime type, if desired - global $wgVerifyMimeType; - if ($wgVerifyMimeType) { - - wfDebug ( "\n\nmime: <$mime> extension: <$extension>\n\n"); - #check mime type against file extension - if( !$this->verifyExtension( $mime, $extension ) ) { - return new WikiErrorMsg( 'uploadcorrupt' ); - } - - #check mime type blacklist - global $wgMimeTypeBlacklist; - if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist) - && $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) { - return new WikiErrorMsg( 'filetype-badmime', htmlspecialchars( $mime ) ); - } - } - - #check for htmlish code and javascript - if( $this->detectScript ( $tmpfile, $mime, $extension ) ) { - return new WikiErrorMsg( 'uploadscripted' ); - } - - /** - * Scan the uploaded file for viruses - */ - $virus= $this->detectVirus($tmpfile); - if ( $virus ) { - return new WikiErrorMsg( 'uploadvirus', htmlspecialchars($virus) ); - } - - wfDebug( __METHOD__.": all clear; passing.\n" ); - return true; - } - - /** - * Checks if the mime type of the uploaded file matches the file extension. - * - * @param string $mime the mime type of the uploaded file - * @param string $extension The filename extension that the file is to be served with - * @return bool - */ - function verifyExtension( $mime, $extension ) { - $magic =& MimeMagic::singleton(); - - if ( ! $mime || $mime == 'unknown' || $mime == 'unknown/unknown' ) - if ( ! $magic->isRecognizableExtension( $extension ) ) { - wfDebug( __METHOD__.": passing file with unknown detected mime type; " . - "unrecognized extension '$extension', can't verify\n" ); - return true; - } else { - wfDebug( __METHOD__.": rejecting file with unknown detected mime type; ". - "recognized extension '$extension', so probably invalid file\n" ); - return false; - } - - $match= $magic->isMatchingExtension($extension,$mime); - - if ($match===NULL) { - wfDebug( __METHOD__.": no file extension known for mime type $mime, passing file\n" ); - return true; - } elseif ($match===true) { - wfDebug( __METHOD__.": mime type $mime matches extension $extension, passing file\n" ); - - #TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it! - return true; - - } else { - wfDebug( __METHOD__.": mime type $mime mismatches file extension $extension, rejecting file\n" ); - return false; - } - } - - /** - * Heuristic for detecting files that *could* contain JavaScript instructions or - * things that may look like HTML to a browser and are thus - * potentially harmful. The present implementation will produce false positives in some situations. - * - * @param string $file Pathname to the temporary upload file - * @param string $mime The mime type of the file - * @param string $extension The extension of the file - * @return bool true if the file contains something looking like embedded scripts - */ - function detectScript($file, $mime, $extension) { - global $wgAllowTitlesInSVG; - - #ugly hack: for text files, always look at the entire file. - #For binarie field, just check the first K. - - if (strpos($mime,'text/')===0) $chunk = file_get_contents( $file ); - else { - $fp = fopen( $file, 'rb' ); - $chunk = fread( $fp, 1024 ); - fclose( $fp ); - } - - $chunk= strtolower( $chunk ); - - if (!$chunk) return false; - - #decode from UTF-16 if needed (could be used for obfuscation). - if (substr($chunk,0,2)=="\xfe\xff") $enc= "UTF-16BE"; - elseif (substr($chunk,0,2)=="\xff\xfe") $enc= "UTF-16LE"; - else $enc= NULL; - - if ($enc) $chunk= iconv($enc,"ASCII//IGNORE",$chunk); - - $chunk= trim($chunk); - - #FIXME: convert from UTF-16 if necessarry! - - wfDebug("SpecialUpload::detectScript: checking for embedded scripts and HTML stuff\n"); - - #check for HTML doctype - if (eregi("<!DOCTYPE *X?HTML",$chunk)) return true; - - /** - * Internet Explorer for Windows performs some really stupid file type - * autodetection which can cause it to interpret valid image files as HTML - * and potentially execute JavaScript, creating a cross-site scripting - * attack vectors. - * - * Apple's Safari browser also performs some unsafe file type autodetection - * which can cause legitimate files to be interpreted as HTML if the - * web server is not correctly configured to send the right content-type - * (or if you're really uploading plain text and octet streams!) - * - * Returns true if IE is likely to mistake the given file for HTML. - * Also returns true if Safari would mistake the given file for HTML - * when served with a generic content-type. - */ - - $tags = array( - '<body', - '<head', - '<html', #also in safari - '<img', - '<pre', - '<script', #also in safari - '<table' - ); - if( ! $wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) { - $tags[] = '<title'; - } - - foreach( $tags as $tag ) { - if( false !== strpos( $chunk, $tag ) ) { - return true; - } - } - - /* - * look for javascript - */ - - #resolve entity-refs to look at attributes. may be harsh on big files... cache result? - $chunk = Sanitizer::decodeCharReferences( $chunk ); - - #look for script-types - if (preg_match('!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim',$chunk)) return true; - - #look for html-style script-urls - if (preg_match('!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true; - - #look for css-style script-urls - if (preg_match('!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true; - - wfDebug("SpecialUpload::detectScript: no scripts found\n"); - return false; - } - - /** - * Generic wrapper function for a virus scanner program. - * This relies on the $wgAntivirus and $wgAntivirusSetup variables. - * $wgAntivirusRequired may be used to deny upload if the scan fails. - * - * @param string $file Pathname to the temporary upload file - * @return mixed false if not virus is found, NULL if the scan fails or is disabled, - * or a string containing feedback from the virus scanner if a virus was found. - * If textual feedback is missing but a virus was found, this function returns true. - */ - function detectVirus($file) { - global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut; - - if ( !$wgAntivirus ) { - wfDebug( __METHOD__.": virus scanner disabled\n"); - return NULL; - } - - if ( !$wgAntivirusSetup[$wgAntivirus] ) { - wfDebug( __METHOD__.": unknown virus scanner: $wgAntivirus\n" ); - # @TODO: localise - $wgOut->addHTML( "<div class='error'>Bad configuration: unknown virus scanner: <i>$wgAntivirus</i></div>\n" ); - return "unknown antivirus: $wgAntivirus"; - } - - # look up scanner configuration - $command = $wgAntivirusSetup[$wgAntivirus]["command"]; - $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]["codemap"]; - $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]["messagepattern"] ) ? - $wgAntivirusSetup[$wgAntivirus]["messagepattern"] : null; - - if ( strpos( $command,"%f" ) === false ) { - # simple pattern: append file to scan - $command .= " " . wfEscapeShellArg( $file ); - } else { - # complex pattern: replace "%f" with file to scan - $command = str_replace( "%f", wfEscapeShellArg( $file ), $command ); - } - - wfDebug( __METHOD__.": running virus scan: $command \n" ); - - # execute virus scanner - $exitCode = false; - - #NOTE: there's a 50 line workaround to make stderr redirection work on windows, too. - # that does not seem to be worth the pain. - # Ask me (Duesentrieb) about it if it's ever needed. - $output = array(); - if ( wfIsWindows() ) { - exec( "$command", $output, $exitCode ); - } else { - exec( "$command 2>&1", $output, $exitCode ); - } - - # map exit code to AV_xxx constants. - $mappedCode = $exitCode; - if ( $exitCodeMap ) { - if ( isset( $exitCodeMap[$exitCode] ) ) { - $mappedCode = $exitCodeMap[$exitCode]; - } elseif ( isset( $exitCodeMap["*"] ) ) { - $mappedCode = $exitCodeMap["*"]; - } - } - - if ( $mappedCode === AV_SCAN_FAILED ) { - # scan failed (code was mapped to false by $exitCodeMap) - wfDebug( __METHOD__.": failed to scan $file (code $exitCode).\n" ); - - if ( $wgAntivirusRequired ) { - return "scan failed (code $exitCode)"; - } else { - return NULL; - } - } else if ( $mappedCode === AV_SCAN_ABORTED ) { - # scan failed because filetype is unknown (probably imune) - wfDebug( __METHOD__.": unsupported file type $file (code $exitCode).\n" ); - return NULL; - } else if ( $mappedCode === AV_NO_VIRUS ) { - # no virus found - wfDebug( __METHOD__.": file passed virus scan.\n" ); - return false; - } else { - $output = join( "\n", $output ); - $output = trim( $output ); - - if ( !$output ) { - $output = true; #if there's no output, return true - } elseif ( $msgPattern ) { - $groups = array(); - if ( preg_match( $msgPattern, $output, $groups ) ) { - if ( $groups[1] ) { - $output = $groups[1]; - } - } - } - - wfDebug( __METHOD__.": FOUND VIRUS! scanner feedback: $output" ); - return $output; - } - } - - /** - * Check if the temporary file is MacBinary-encoded, as some uploads - * from Internet Explorer on Mac OS Classic and Mac OS X will be. - * If so, the data fork will be extracted to a second temporary file, - * which will then be checked for validity and either kept or discarded. - * - * @access private - */ - function checkMacBinary() { - $macbin = new MacBinary( $this->mTempPath ); - if( $macbin->isValid() ) { - $dataFile = tempnam( wfTempDir(), "WikiMacBinary" ); - $dataHandle = fopen( $dataFile, 'wb' ); - - wfDebug( "SpecialUpload::checkMacBinary: Extracting MacBinary data fork to $dataFile\n" ); - $macbin->extractData( $dataHandle ); - - $this->mTempPath = $dataFile; - $this->mFileSize = $macbin->dataForkLength(); - - // We'll have to manually remove the new file if it's not kept. - $this->mRemoveTempFile = true; - } - $macbin->close(); - } - - /** - * If we've modified the upload file we need to manually remove it - * on exit to clean up. - * @access private - */ - function cleanupTempFile() { - if ( $this->mRemoveTempFile && file_exists( $this->mTempPath ) ) { - wfDebug( "SpecialUpload::cleanupTempFile: Removing temporary file {$this->mTempPath}\n" ); - unlink( $this->mTempPath ); - } - } - - /** - * Check if there's an overwrite conflict and, if so, if restrictions - * forbid this user from performing the upload. - * - * @return mixed true on success, WikiError on failure - * @access private - */ - function checkOverwrite( $name ) { - $img = wfFindFile( $name ); - - $error = ''; - if( $img ) { - global $wgUser, $wgOut; - if( $img->isLocal() ) { - if( !self::userCanReUpload( $wgUser, $img->name ) ) { - $error = 'fileexists-forbidden'; - } - } else { - if( !$wgUser->isAllowed( 'reupload' ) || - !$wgUser->isAllowed( 'reupload-shared' ) ) { - $error = "fileexists-shared-forbidden"; - } - } - } - - if( $error ) { - $errorText = wfMsg( $error, wfEscapeWikiText( $img->getName() ) ); - return $errorText; - } - - // Rockin', go ahead and upload - return true; - } - - /** - * Check if a user is the last uploader - * - * @param User $user - * @param string $img, image name - * @return bool - */ - public static function userCanReUpload( User $user, $img ) { - if( $user->isAllowed( 'reupload' ) ) - return true; // non-conditional - if( !$user->isAllowed( 'reupload-own' ) ) - return false; - - $dbr = wfGetDB( DB_SLAVE ); - $row = $dbr->selectRow('image', - /* SELECT */ 'img_user', - /* WHERE */ array( 'img_name' => $img ) - ); - if ( !$row ) - return false; - - return $user->getID() == $row->img_user; - } - - /** - * Display an error with a wikitext description - */ - function showError( $description ) { - global $wgOut; - $wgOut->setPageTitle( wfMsg( "internalerror" ) ); - $wgOut->setRobotpolicy( "noindex,nofollow" ); - $wgOut->setArticleRelated( false ); - $wgOut->enableClientCache( false ); - $wgOut->addWikiText( $description ); - } - - /** - * Get the initial image page text based on a comment and optional file status information - */ - static function getInitialPageText( $comment, $license, $copyStatus, $source ) { - global $wgUseCopyrightUpload; - if ( $wgUseCopyrightUpload ) { - if ( $license != '' ) { - $licensetxt = '== ' . wfMsgForContent( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n"; - } - $pageText = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n" . - '== ' . wfMsgForContent ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" . - "$licensetxt" . - '== ' . wfMsgForContent ( 'filesource' ) . " ==\n" . $source ; - } else { - if ( $license != '' ) { - $filedesc = $comment == '' ? '' : '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n"; - $pageText = $filedesc . - '== ' . wfMsgForContent ( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n"; - } else { - $pageText = $comment; - } - } - return $pageText; - } - - /** - * If there are rows in the deletion log for this file, show them, - * along with a nice little note for the user - * - * @param OutputPage $out - * @param string filename - */ - private function showDeletionLog( $out, $filename ) { - $reader = new LogReader( - new FauxRequest( - array( - 'page' => $filename, - 'type' => 'delete', - ) - ) - ); - if( $reader->hasRows() ) { - $out->addHtml( '<div id="mw-upload-deleted-warn">' ); - $out->addWikiMsg( 'upload-wasdeleted' ); - $viewer = new LogViewer( $reader ); - $viewer->showList( $out ); - $out->addHtml( '</div>' ); - } - } -} |