+++ /dev/null
-<?php
-
-class UploadBase {
- var $mTempPath;
- var $mDesiredDestName, $mDestName, $mRemoveTempFile, $mSourceType;
- var $mTitle = false, $mTitleError = 0;
- var $mFilteredName, $mFinalExtension;
-
- const SUCCESS = 0;
- const OK = 0;
- const BEFORE_PROCESSING = 1;
- const LARGE_FILE_SERVER = 2;
- const EMPTY_FILE = 3;
- const MIN_LENGTH_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;
-
- const SESSION_VERSION = 2;
-
- /**
- * Returns true if uploads are enabled.
- * Can be overriden by subclasses.
- */
- static function isEnabled() {
- global $wgEnableUploads;
- return $wgEnableUploads;
- }
- /**
- * Returns true if the user can use this upload module or else a string
- * identifying the missing permission.
- * Can be overriden by subclasses.
- */
- static function isAllowed( $user ) {
- if( !$user->isAllowed( 'upload' ) )
- return 'upload';
- return true;
- }
-
- // Upload handlers. Should probably just be a global
- static $uploadHandlers = array( 'Stash', 'Upload', 'Url' );
- /**
- * Create a form of UploadBase depending on wpSourceType and initializes it
- */
- static function createFromRequest( &$request, $type = null ) {
- $type = $type ? $type : $request->getVal( 'wpSourceType' );
- if( !$type )
- return null;
- $type = ucfirst($type);
- $className = 'UploadFrom'.$type;
- if( !in_array( $type, self::$uploadHandlers ) )
- return null;
- if( !call_user_func( array( $className, 'isEnabled' ) ) )
- return null;
- if( !call_user_func( array( $className, 'isValidRequest' ), $request ) )
- return null;
-
- $handler = new $className;
- $handler->initializeFromRequest( $request );
- return $handler;
- }
-
- /**
- * Check whether a request if valid for this handler
- */
- static function isValidRequest( $request ) {
- return false;
- }
-
- function __construct() {}
-
- /**
- * Do the real variable initialization
- */
- function initialize( $name, $tempPath, $fileSize, $removeTempFile = false ) {
- $this->mDesiredDestName = $name;
- $this->mTempPath = $tempPath;
- $this->mFileSize = $fileSize;
- $this->mRemoveTempFile = $removeTempFile;
- }
-
- /**
- * Fetch the file. Usually a no-op
- */
- function fetchFile() {
- return self::OK;
- }
-
- /**
- * Verify whether the upload is sane.
- * Returns self::OK or else an array with error information
- */
- function verifyUpload() {
- global $wgUser;
-
- /**
- * If there was no filename or a zero size given, give up quick.
- */
- if( empty( $this->mFileSize ) )
- return array( 'status' => self::EMPTY_FILE );
-
- $nt = $this->getTitle();
- if( is_null( $nt ) ) {
- $result = array( 'status' => $this->mTitleError );
- if( $this->mTitleError == self::ILLEGAL_FILENAME )
- $resul['filtered'] = $this->mFilteredName;
- if ( $this->mTitleError == self::FILETYPE_BADTYPE )
- $result['finalExt'] = $this->mFinalExtension;
- return $result;
- }
- $this->mLocalFile = wfLocalFile( $nt );
- $this->mDestName = $this->mLocalFile->getName();
-
- /**
- * In some cases we may forbid overwriting of existing files.
- */
- $overwrite = $this->checkOverwrite( $this->mDestName );
- if( $overwrite !== true )
- return array( 'status' => self::OVERWRITE_EXISTING_FILE, 'overwrite' => $overwrite );
-
- /**
- * 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.
- */
- $verification = $this->verifyFile( $this->mTempPath );
-
- if( $verification !== true ) {
- if( !is_array( $verification ) )
- $verification = array( $verification );
- $verification['status'] = self::VERIFICATION_ERROR;
- return $verification;
- }
-
- $error = '';
- if( !wfRunHooks( 'UploadVerification',
- array( $this->mDestName, $this->mTempPath, &$error ) ) ) {
- return array( 'status' => self::UPLOAD_VERIFICATION_ERROR, 'error' => $error );
- }
-
- return self::OK;
- }
-
- /**
- * Verifies that it's ok to include the uploaded file
- *
- * @param string $tmpfile the full path of the temporary file to verify
- * @return mixed true of the file is verified, a string or array otherwise.
- */
- protected function verifyFile( $tmpfile ) {
- $this->mFileProps = File::getPropsFromPath( $this->mTempPath,
- $this->mFinalExtension );
- $this->checkMacBinary();
-
- #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: <{$this->mFinalExtension}>\n\n");
- #check mime type against file extension
- if( !self::verifyExtension( $mime, $this->mFinalExtension ) ) {
- return 'uploadcorrupt';
- }
-
- #check mime type blacklist
- global $wgMimeTypeBlacklist;
- if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist)
- && $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
- return array( 'filetype-badmime', $mime );
- }
- }
-
- #check for htmlish code and javascript
- if( $this->detectScript ( $tmpfile, $mime, $this->mFinalExtension ) ) {
- return 'uploadscripted';
- }
-
- /**
- * Scan the uploaded file for viruses
- */
- $virus = $this->detectVirus($tmpfile);
- if ( $virus ) {
- return array( 'uploadvirus', $virus );
- }
-
- wfDebug( __METHOD__.": all clear; passing.\n" );
- return true;
- }
-
- /**
- * Check whether the user can edit, upload and create the image
- */
- function verifyPermissions( $user ) {
- /**
- * If the image is protected, non-sysop users won't be able
- * to modify it by uploading a new revision.
- */
- $nt = $this->getTitle();
- if( is_null( $nt ) )
- return true;
- $permErrors = $nt->getUserPermissionsErrors( 'edit', $user );
- $permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $user );
- $permErrorsCreate = ( $nt->exists() ? array() : $nt->getUserPermissionsErrors( 'create', $user ) );
- if( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
- $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
- $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );
- return $permErrors;
- }
- return true;
- }
-
- /**
- * Check for non fatal problems with the file
- */
- function checkWarnings() {
- $warning = array();
-
- $filename = $this->mLocalFile->getName();
- $n = strrpos( $filename, '.' );
- $partname = $n ? substr( $filename, 0, $n ) : $filename;
-
- // Check whether the resulting filename is different from the desired one
- if( $this->mDesiredDestName != $filename )
- $warning['badfilename'] = $filename;
-
- // Check whether the file extension is on the unwanted list
- global $wgCheckFileExtensions, $wgFileExtensions;
- if ( $wgCheckFileExtensions ) {
- if ( !$this->checkFileExtension( $this->mFinalExtension, $wgFileExtensions ) )
- $warning['filetype-unwanted-type'] = $this->mFinalExtension;
- }
-
- global $wgUploadSizeWarning;
- if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) )
- $warning['large-file'] = $wgUploadSizeWarning;
-
- if ( $this->mFileSize == 0 )
- $warning['emptyfile'] = true;
-
- $exists = self::getExistsWarning( $this->mLocalFile );
- if( $exists !== false )
- $warning['exists'] = $exists;
-
- // Check whether this may be a thumbnail
- if( $exists !== false && $exists[0] != 'thumb'
- && self::isThumbName( $this->mLocalFile->getName() ) )
- $warning['file-thumbnail-no'] = substr( $filename , 0,
- strpos( $nt->getText() , '-' ) +1 );
-
- $hash = File::sha1Base36( $this->mTempPath );
- $dupes = RepoGroup::singleton()->findBySha1( $hash );
- if( $dupes )
- $warning['duplicate'] = $dupes;
-
- $filenamePrefixBlacklist = self::getFilenamePrefixBlacklist();
- foreach( $filenamePrefixBlacklist as $prefix ) {
- if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
- $warning['filename-bad-prefix'] = $prefix;
- break;
- }
- }
-
- # If the file existed before and was deleted, warn the user of this
- # Don't bother doing so if the file exists now, however
- if( $this->mLocalFile->wasDeleted() && !$this->mLocalFile->exists() )
- $warning['filewasdeleted'] = $this->mLocalFile->getTitle();
-
- return $warning;
- }
-
- /**
- * Really perform the upload.
- */
- function performUpload( $comment, $pageText, $watch, $user ) {
- $status = $this->mLocalFile->upload( $this->mTempPath, $comment, $pageText,
- File::DELETE_SOURCE, $this->mFileProps, false, $user );
-
- if( $status->isGood() && $watch ) {
- $user->addWatch( $this->mLocalFile->getTitle() );
- }
-
- if( $status->isGood() )
- wfRunHooks( 'UploadComplete', array( &$this ) );
-
- return $status;
- }
-
- /**
- * Returns a title or null
- */
- function getTitle() {
- if ( $this->mTitle !== false )
- return $this->mTitle;
-
- /**
- * 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.
- */
-
- $basename = $this->mDesiredDestName;
-
- $this->mFilteredName = wfStripIllegalFilenameChars( $basename );
-
- /**
- * We'll want to blacklist against *any* 'extension', and use
- * only the final one for the whitelist.
- */
- list( $partname, $ext ) = $this->splitExtensions( $this->mFilteredName );
-
- if( count( $ext ) ) {
- $this->mFinalExtension = $ext[count( $ext ) - 1];
- } else {
- $this->mFinalExtension = '';
- }
-
- /* Don't allow users to override the blacklist (check file extension) */
- global $wgCheckFileExtensions, $wgStrictFileExtensions;
- global $wgFileExtensions, $wgFileBlacklist;
- if ( $this->mFinalExtension == '' ) {
- $this->mTitleError = self::FILETYPE_MISSING;
- return $this->mTitle = null;
- } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) ||
- ( $wgCheckFileExtensions && $wgStrictFileExtensions &&
- !$this->checkFileExtension( $this->mFinalExtension, $wgFileExtensions ) ) ) {
- $this->mTitleError = self::FILETYPE_BADTYPE;
- return $this->mTitle = null;
- }
-
- # 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 ) {
- $this->mTitleError = self::MIN_LENGTH_PARTNAME;
- return $this->mTitle = null;
- }
-
- $nt = Title::makeTitleSafe( NS_FILE, $this->mFilteredName );
- if( is_null( $nt ) ) {
- $this->mTitleError = self::ILLEGAL_FILENAME;
- return $this->mTitle = null;
- }
- return $this->mTitle = $nt;
- }
-
- function getLocalFile() {
- if( is_null( $this->mLocalFile ) ) {
- $nt = $this->getTitle();
- $this->mLocalFile = is_null( $nt ) ? null : wfLocalFile( $nt );
- }
- return $this->mLocalFile;
- }
-
- /**
- * 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 );
- return $status;
- }
-
- /**
- * 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() {
- $status = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath );
-
- if( !$status->isGood() ) {
- # Couldn't save the file.
- return false;
- }
-
- return array(
- 'mTempPath' => $status->value,
- 'mFileSize' => $this->mFileSize,
- 'mFileProps' => $this->mFileProps,
- 'version' => self::SESSION_VERSION,
- );
- }
-
- /**
- * Remove a temporarily kept file stashed by saveTempUploadedFile().
- * @return success
- */
- function unsaveUploadedFile() {
- $repo = RepoGroup::singleton()->getLocalRepo();
- $success = $repo->freeTemp( $this->mTempPath );
- return $success;
- }
-
- /**
- * 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( $this->mTempPath ) ) {
- wfDebug( __METHOD__.": Removing temporary file {$this->mTempPath}\n" );
- unlink( $this->mTempPath );
- }
- }
-
- function getTempPath() {
- return $this->mTempPath;
- }
-
-
- /**
- * 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;
- }
-
-
- /**
- * 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
- */
- public 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 $wgAllowTitlesInSVG;
-
- #ugly hack: for text files, always look at the entire file.
- #For binary field, just check the first K.
-
- if (strpos($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();
- }
-
- /**
- * 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() {
- global $wgUser;
- // First check whether the local file can be overwritten
- if( $this->mLocalFile->exists() )
- if( !self::userCanReUpload( $wgUser, $this->mLocalFile ) )
- return 'fileexists-forbidden';
-
- // Check shared conflicts
- $file = wfFindFile( $this->mLocalFile->getName() );
- if ( $file && ( !$wgUser->isAllowed( 'reupload' ) ||
- !$wgUser->isAllowed( 'reupload-shared' ) ) )
- return 'fileexists-shared-forbidden';
-
- 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;
- if( is_string( $img ) )
- $img = wfLocalFile( $img );
- if ( !( $img instanceof LocalFile ) )
- return false;
-
- return $user->getId() == $img->getUser( 'id' );
- }
-
- public static function getExistsWarning( $file ) {
- if( $file->exists() )
- return array( 'exists', $file );
-
- if( $file->getTitle()->getArticleID() )
- return array( 'page-exists', $file );
-
- 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 );
- }
-
- 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_FILE, $partname . '.' . $file->getExtension() );
- $file_lc = wfLocalFile( $nt_lc );
-
- if( $file_lc->exists() )
- return array( 'exists-normalized', $file_lc );
- }
-
- if ( self::isThumbName( $file->getName() ) ) {
- # 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() )
- return array( 'thumb', $file_thb );
- }
-
- return false;
- }
-
- public static function isThumbName( $filename ) {
- $n = strrpos( $filename, '.' );
- $partname = $n ? substr( $filename, 0, $n ) : $filename;
- return (
- substr( $partname , 3, 3 ) == 'px-' ||
- substr( $partname , 2, 3 ) == 'px-'
- ) &&
- ereg( "[0-9]{2}" , substr( $partname , 0, 2) );
- }
-
- /**
- * 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;
- }
-
-
-}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff