diff options
Diffstat (limited to 'includes/specials/SpecialUpload.php')
| -rw-r--r-- | includes/specials/SpecialUpload.php | 1755 |
1 files changed, 1755 insertions, 0 deletions
diff --git a/includes/specials/SpecialUpload.php b/includes/specials/SpecialUpload.php new file mode 100644 index 00000000..8fe2f52f --- /dev/null +++ b/includes/specials/SpecialUpload.php @@ -0,0 +1,1755 @@ +<?php +/** + * @file + * @ingroup SpecialPage + */ + + +/** + * Entry point + */ +function wfSpecialUpload() { + global $wgRequest; + $form = new UploadForm( $wgRequest ); + $form->execute(); +} + +/** + * implements Special:Upload + * @ingroup 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->showErrorPage( '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->showErrorPage( '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->showErrorPage( 'upload-misc-error', 'upload-misc-error-text' ); + else + $wgOut->showErrorPage( "upload-curl-error$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; + } + # Because it is probably checked and shouldn't be + $this->mIgnoreWarning = false; + + $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, $wgLang; + $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: + $wgOut->showPermissionsErrorPage( $details['permissionserrors'] ); + break; + + case self::OVERWRITE_EXISTING_FILE: + $errorText = $details['overwrite']; + $this->uploadError( $wgOut->parse( $errorText ) ); + 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 + ), + $wgLang->formatNum( count($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; + } + + /** + * If there was no filename or a zero size given, give up quick. + */ + if( trim( $this->mSrcName ) == '' || empty( $this->mFileSize ) ) { + return self::EMPTY_FILE; + } + + /* Check for curl error */ + if( $this->mCurlError ) { + return self::BEFORE_PROCESSING; + } + + /** + * Chop off any directories in the given filename. Then + * filter out illegal characters, and try to make a legible name + * out of it. We'll strip some silently that Title would die on. + */ + if( $this->mDesiredDestName ) { + $basename = $this->mDesiredDestName; + } else { + $basename = $this->mSrcName; + } + $filtered = wfStripIllegalFilenameChars( $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; + } + + $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. + */ + $permErrors = $nt->getUserPermissionsErrors( 'edit', $wgUser ); + $permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $wgUser ); + $permErrorsCreate = ( $nt->exists() ? array() : $nt->getUserPermissionsErrors( 'create', $wgUser ) ); + + if( $permErrors || $permErrorsUpload || $permErrorsCreate ) { + // merge all the problems into one list, avoiding duplicates + $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) ); + $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) ); + $resultDetails = array( 'permissionserrors' => $permErrors ); + 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 $wgCheckFileExtensions, $wgStrictFileExtensions; + global $wgFileExtensions, $wgFileBlacklist; + if ($finalExt == '') { + return self::FILETYPE_MISSING; + } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) || + ($wgCheckFileExtensions && $wgStrictFileExtensions && + !$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 ) ) { + global $wgLang; + $warning .= '<li>' . + wfMsgExt( 'filetype-unwanted-type', + array( 'parseinline' ), + htmlspecialchars( $finalExt ), + implode( + wfMsgExt( 'comma-separator', array( 'escapenoentities' ) ), + $wgFileExtensions + ), + $wgLang->formatNum( count($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 ); + } + + $warning .= $this->getDupeWarning( $this->mTempPath ); + + 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 { + $n = strrpos( $file->getName(), '.' ); + $rawExtension = substr( $file->getName(), $n + 1 ); + $partname = substr( $file->getName(), 0, $n ); + } + + $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::makeTitle( NS_IMAGE, $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('parseinline','replaceafter'), $dlink ) . '</li>' . $dlink2; + + } elseif( $file->getTitle()->getArticleID() ) { + $lnk = $sk->makeKnownLinkObj( $file->getTitle(), '', 'redirect=no' ); + $warning .= '<li>' . wfMsgExt( 'filepageexists', array( 'parseinline', 'replaceafter' ), $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->getTitle()->getPrefixedText(), $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(); + } + + /** + * Check for duplicate files and throw up a warning before the upload + * completes. + */ + function getDupeWarning( $tempfile ) { + $hash = File::sha1Base36( $tempfile ); + $dupes = RepoGroup::singleton()->findBySha1( $hash ); + if( $dupes ) { + global $wgOut; + $msg = "<gallery>"; + foreach( $dupes as $file ) { + $title = $file->getTitle(); + $msg .= $title->getPrefixedText() . + "|" . $title->getText() . "\n"; + } + $msg .= "</gallery>"; + return "<li>" . + wfMsgExt( "file-exists-duplicate", array( "parse" ), count( $dupes ) ) . + $wgOut->parse( $msg ) . + "</li>\n"; + } else { + return ''; + } + } + + /** + * 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>' ); + } + + /** + * 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; + 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>\n" ); + + $titleObj = SpecialPage::getTitleFor( 'Upload' ); + + if ( $wgUseCopyrightUpload ) { + $copyright = Xml::hidden( 'wpUploadCopyStatus', $this->mCopyrightStatus ) . "\n" . + Xml::hidden( 'wpUploadSource', $this->mCopyrightSource ) . "\n"; + } else { + $copyright = ''; + } + + $wgOut->addHTML( + Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL( 'action=submit' ), + 'enctype' => 'multipart/form-data', 'id' => 'uploadwarning' ) ) . "\n" . + Xml::hidden( 'wpIgnoreWarning', '1' ) . "\n" . + Xml::hidden( 'wpSessionKey', $this->mSessionKey ) . "\n" . + Xml::hidden( 'wpUploadDescription', $this->mComment ) . "\n" . + Xml::hidden( 'wpLicense', $this->mLicense ) . "\n" . + Xml::hidden( 'wpDestFile', $this->mDesiredDestName ) . "\n" . + Xml::hidden( 'wpWatchthis', $this->mWatchthis ) . "\n" . + "{$copyright}<br />" . + Xml::submitButton( wfMsg( 'ignorewarning' ), array ( 'name' => 'wpUpload', 'id' => 'wpUpload', 'checked' => 'checked' ) ) . ' ' . + Xml::submitButton( wfMsg( 'reuploaddesc' ), array ( 'name' => 'wpReUpload', 'id' => 'wpReUpload' ) ) . + Xml::closeElement( '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, $wgLang, $wgMaxUploadSize; + global $wgUseCopyrightUpload, $wgUseAjax, $wgAjaxUploadDestCheck, $wgAjaxLicensePreview; + global $wgRequest, $wgAllowCopyUploads; + global $wgStylePath, $wgStyleVersion; + + $useAjaxDestCheck = $wgUseAjax && $wgAjaxUploadDestCheck; + $useAjaxLicensePreview = $wgUseAjax && $wgAjaxLicensePreview; + + $adc = wfBoolToStr( $useAjaxDestCheck ); + $alp = wfBoolToStr( $useAjaxLicensePreview ); + $autofill = wfBoolToStr( $this->mDesiredDestName == '' ); + + $wgOut->addScript( "<script type=\"text/javascript\"> +wgAjaxUploadDestCheck = {$adc}; +wgAjaxLicensePreview = {$alp}; +wgUploadAutoFill = {$autofill}; +</script>" ); + $wgOut->addScriptFile( 'upload.js' ); + $wgOut->addScriptFile( 'edit.js' ); // For <charinsert> support + + if( !wfRunHooks( 'UploadForm:initial', array( &$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; + + $allowedExtensions = ''; + if( $wgCheckFileExtensions ) { + $delim = wfMsgExt( 'comma-separator', array( 'escapenoentities' ) ); + if( $wgStrictFileExtensions ) { + # Everything not permitted is banned + $extensionsList = + '<div id="mw-upload-permitted">' . + wfMsgWikiHtml( 'upload-permitted', implode( $wgFileExtensions, $delim ) ) . + "</div>\n"; + } else { + # We have to list both preferred and prohibited + $extensionsList = + '<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"; + } + } else { + # Everything is permitted. + $extensionsList = ''; + } + + # Get the maximum file size from php.ini as $wgMaxUploadSize works for uploads from URL via CURL only + # See http://www.php.net/manual/en/ini.core.php#ini.upload-max-filesize for possible values of upload_max_filesize + $val = trim( ini_get( 'upload_max_filesize' ) ); + $last = strtoupper( ( substr( $val, -1 ) ) ); + switch( $last ) { + case 'G': + $val2 = substr( $val, 0, -1 ) * 1024 * 1024 * 1024; + break; + case 'M': + $val2 = substr( $val, 0, -1 ) * 1024 * 1024; + break; + case 'K': + $val2 = substr( $val, 0, -1 ) * 1024; + break; + default: + $val2 = $val; + } + $val2 = $wgAllowCopyUploads ? min( $wgMaxUploadSize, $val2 ) : $val2; + $maxUploadSize = '<div id="mw-upload-maxfilesize">' . + wfMsgExt( 'upload-maxfilesize', array( 'parseinline', 'escapenoentities' ), + $wgLang->formatSize( $val2 ) ) . + "</div>\n"; + + $sourcefilename = wfMsgExt( 'sourcefilename', array( 'parseinline', 'escapenoentities' ) ); + $destfilename = wfMsgExt( 'destfilename', array( 'parseinline', 'escapenoentities' ) ); + + $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' ); + + $encDestName = htmlspecialchars( $this->mDesiredDestName ); + + $watchChecked = $this->watchCheck() + ? '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='checked' />" . + "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " . + "onfocus='" . + "toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\");" . + "toggle_element_check(\"wpSourceTypeFile\",\"wpSourceTypeURL\")' " . + "onchange='fillDestFilename(\"wpUploadFile\")' size='60' />" . + 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\")' " . + "onchange='fillDestFilename(\"wpUploadFileURL\")' size='60' disabled='disabled' />" . + wfMsgHtml( 'upload_source_url' ) ; + } else { + $filename_form = + "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " . + ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") . + "size='60' />" . + "<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 ); + + $wgOut->addHTML( + Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL(), + 'enctype' => 'multipart/form-data', 'id' => 'mw-upload-form' ) ) . + Xml::openElement( 'fieldset' ) . + Xml::element( 'legend', null, wfMsg( 'upload' ) ) . + Xml::openElement( 'table', array( 'border' => '0', 'id' => 'mw-upload-table' ) ) . + "<tr> + {$this->uploadFormTextTop} + <td class='mw-label'> + <label for='wpUploadFile'>{$sourcefilename}</label> + </td> + <td class='mw-input'> + {$filename_form} + </td> + </tr> + <tr> + <td></td> + <td> + {$maxUploadSize} + {$extensionsList} + </td> + </tr> + <tr> + <td class='mw-label'> + <label for='wpDestFile'>{$destfilename}</label> + </td> + <td class='mw-input'> + <input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='60' + value=\"{$encDestName}\" onchange='toggleFilenameFiller()' $destOnkeyup /> + </td> + </tr> + <tr> + <td class='mw-label'> + <label for='wpUploadDescription'>{$summary}</label> + </td> + <td class='mw-input'> + <textarea tabindex='3' name='wpUploadDescription' id='wpUploadDescription' rows='6' + cols='{$cols}'{$width}>$encComment</textarea> + {$this->uploadFormTextAfterSummary} + </td> + </tr> + <tr>" + ); + + if ( $licenseshtml != '' ) { + global $wgStylePath; + $wgOut->addHTML( " + <td class='mw-label'> + <label for='wpLicense'>$license</label> + </td> + <td class='mw-input'> + <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 = wfMsgExt( 'filestatus', 'escapenoentities' ); + $copystatus = htmlspecialchars( $this->mCopyrightStatus ); + $filesource = wfMsgExt( 'filesource', 'escapenoentities' ); + $uploadsource = htmlspecialchars( $this->mCopyrightSource ); + + $wgOut->addHTML( " + <td class='mw-label' style='white-space: nowrap;'> + <label for='wpUploadCopyStatus'>$filestatus</label></td> + <td class='mw-input'> + <input tabindex='5' type='text' name='wpUploadCopyStatus' id='wpUploadCopyStatus' + value=\"$copystatus\" size='60' /> + </td> + </tr> + <tr> + <td class='mw-label'> + <label for='wpUploadCopyStatus'>$filesource</label> + </td> + <td class='mw-input'> + <input tabindex='6' type='text' name='wpUploadSource' id='wpUploadCopyStatus' + value=\"$uploadsource\" size='60' /> + </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> + $warningRow + <tr> + <td></td> + <td class='mw-input'> + <input tabindex='9' type='submit' name='wpUpload' value=\"{$ulb}\"" . $wgUser->getSkin()->tooltipAndAccesskey( 'upload' ) . " /> + </td> + </tr> + <tr> + <td></td> + <td class='mw-input'>" + ); + $wgOut->addWikiText( wfMsgForContent( 'edittools' ) ); + $wgOut->addHTML( " + </td> + </tr>" . + Xml::closeElement( 'table' ) . + Xml::hidden( 'wpDestFileWarningAck', '', array( 'id' => 'wpDestFileWarningAck' ) ) . + Xml::closeElement( 'fieldset' ) . + Xml::closeElement( 'form' ) + ); + $uploadfooter = wfMsgNoTrans( 'uploadfooter' ); + if( $uploadfooter != '-' && !wfEmptyMsg( 'uploadfooter', $uploadfooter ) ){ + $wgOut->addWikiText( '<div id="mw-upload-footer-message">' . $uploadfooter . '</div>' ); + } + } + + /* -------------------------------------------------------------- */ + + /** + * See if we should check the 'watch this page' checkbox on the form + * based on the user's preferences and whether we're being asked + * to create a new file or update an existing one. + * + * In the case where 'watch edits' is off but 'watch creations' is on, + * we'll leave the box unchecked. + * + * Note that the page target can be changed *on the form*, so our check + * state can get out of sync. + */ + function watchCheck() { + global $wgUser; + if( $wgUser->getOption( 'watchdefault' ) ) { + // Watch all edits! + return true; + } + + $local = wfLocalFile( $this->mDesiredDestName ); + if( $local && $local->exists() ) { + // We're uploading a new version of an existing file. + // No creation, so don't watch it if we're not already. + return $local->getTitle()->userIsWatching(); + } else { + // New page should get watched if that's our option. + return $wgUser->getOption( 'watchcreations' ); + } + } + + /** + * 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( !self::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 + */ + static 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" ); + $wgOut->wrapWikiMsg( '<div class="error">$1</div>', array( 'virus-badscanner', $wgAntivirus ) ); + return wfMsg('virus-unknownscanner') . " $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 wfMsg('virus-scanfailed', array( $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 ) { + global $wgUser; + $loglist = new LogEventsList( $wgUser->getSkin(), $out ); + $pager = new LogPager( $loglist, 'delete', false, $filename ); + if( $pager->getNumRows() > 0 ) { + $out->addHtml( '<div id="mw-upload-deleted-warn">' ); + $out->addWikiMsg( 'upload-wasdeleted' ); + $out->addHTML( + $loglist->beginLogEventsList() . + $pager->getBody() . + $loglist->endLogEventsList() + ); + $out->addHtml( '</div>' ); + } + } +} |