34fb6297cd
This is a global search and replace of NS_IMAGE and NS_IMAGE_TALK with NS_FILE and NS_FILE_TALK respectively in all core files, excluding those already updated in step 1 (r44004).
867 lines
26 KiB
PHP
867 lines
26 KiB
PHP
<?php
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class UploadBase {
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var $mTempPath;
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var $mDesiredDestName, $mDestName, $mRemoveTempFile, $mSourceType;
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var $mTitle = false, $mTitleError = 0;
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var $mFilteredName, $mFinalExtension;
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const SUCCESS = 0;
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const OK = 0;
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const BEFORE_PROCESSING = 1;
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const LARGE_FILE_SERVER = 2;
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const EMPTY_FILE = 3;
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const MIN_LENGTH_PARTNAME = 4;
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const ILLEGAL_FILENAME = 5;
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const PROTECTED_PAGE = 6;
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const OVERWRITE_EXISTING_FILE = 7;
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const FILETYPE_MISSING = 8;
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const FILETYPE_BADTYPE = 9;
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const VERIFICATION_ERROR = 10;
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const UPLOAD_VERIFICATION_ERROR = 11;
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const UPLOAD_WARNING = 12;
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const INTERNAL_ERROR = 13;
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const SESSION_VERSION = 2;
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/**
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* Returns true if uploads are enabled.
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* Can be overriden by subclasses.
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*/
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static function isEnabled() {
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global $wgEnableUploads;
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return $wgEnableUploads;
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}
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/**
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* Returns true if the user can use this upload module or else a string
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* identifying the missing permission.
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* Can be overriden by subclasses.
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*/
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static function isAllowed( $user ) {
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if( !$user->isAllowed( 'upload' ) )
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return 'upload';
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return true;
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}
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// Upload handlers. Should probably just be a global
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static $uploadHandlers = array( 'Stash', 'Upload', 'Url' );
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/**
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* Create a form of UploadBase depending on wpSourceType and initializes it
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*/
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static function createFromRequest( &$request, $type = null ) {
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$type = $type ? $type : $request->getVal( 'wpSourceType' );
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if( !$type )
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return null;
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$type = ucfirst($type);
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$className = 'UploadFrom'.$type;
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if( !in_array( $type, self::$uploadHandlers ) )
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return null;
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if( !call_user_func( array( $className, 'isEnabled' ) ) )
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return null;
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if( !call_user_func( array( $className, 'isValidRequest' ), $request ) )
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return null;
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$handler = new $className;
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$handler->initializeFromRequest( $request );
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return $handler;
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}
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/**
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* Check whether a request if valid for this handler
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*/
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static function isValidRequest( $request ) {
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return false;
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}
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function __construct() {}
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/**
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* Do the real variable initialization
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*/
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function initialize( $name, $tempPath, $fileSize, $removeTempFile = false ) {
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$this->mDesiredDestName = $name;
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$this->mTempPath = $tempPath;
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$this->mFileSize = $fileSize;
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$this->mRemoveTempFile = $removeTempFile;
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}
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/**
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* Fetch the file. Usually a no-op
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*/
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function fetchFile() {
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return self::OK;
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}
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/**
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* Verify whether the upload is sane.
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* Returns self::OK or else an array with error information
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*/
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function verifyUpload() {
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global $wgUser;
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/**
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* If there was no filename or a zero size given, give up quick.
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*/
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if( empty( $this->mFileSize ) )
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return array( 'status' => self::EMPTY_FILE );
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$nt = $this->getTitle();
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if( is_null( $nt ) ) {
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$result = array( 'status' => $this->mTitleError );
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if( $this->mTitleError == self::ILLEGAL_FILENAME )
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$resul['filtered'] = $this->mFilteredName;
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if ( $this->mTitleError == self::FILETYPE_BADTYPE )
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$result['finalExt'] = $this->mFinalExtension;
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return $result;
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}
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$this->mLocalFile = wfLocalFile( $nt );
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$this->mDestName = $this->mLocalFile->getName();
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/**
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* In some cases we may forbid overwriting of existing files.
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*/
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$overwrite = $this->checkOverwrite( $this->mDestName );
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if( $overwrite !== true )
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return array( 'status' => self::OVERWRITE_EXISTING_FILE, 'overwrite' => $overwrite );
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/**
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* Look at the contents of the file; if we can recognize the
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* type but it's corrupt or data of the wrong type, we should
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* probably not accept it.
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*/
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$verification = $this->verifyFile( $this->mTempPath );
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if( $verification !== true ) {
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if( !is_array( $verification ) )
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$verification = array( $verification );
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$verification['status'] = self::VERIFICATION_ERROR;
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return $verification;
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}
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$error = '';
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if( !wfRunHooks( 'UploadVerification',
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array( $this->mDestName, $this->mTempPath, &$error ) ) ) {
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return array( 'status' => self::UPLOAD_VERIFICATION_ERROR, 'error' => $error );
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}
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return self::OK;
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}
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/**
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* Verifies that it's ok to include the uploaded file
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*
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* @param string $tmpfile the full path of the temporary file to verify
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* @return mixed true of the file is verified, a string or array otherwise.
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*/
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protected function verifyFile( $tmpfile ) {
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$this->mFileProps = File::getPropsFromPath( $this->mTempPath,
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$this->mFinalExtension );
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$this->checkMacBinary();
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#magically determine mime type
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$magic = MimeMagic::singleton();
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$mime = $magic->guessMimeType( $tmpfile, false );
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#check mime type, if desired
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global $wgVerifyMimeType;
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if ( $wgVerifyMimeType ) {
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wfDebug ( "\n\nmime: <$mime> extension: <{$this->mFinalExtension}>\n\n");
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#check mime type against file extension
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if( !self::verifyExtension( $mime, $this->mFinalExtension ) ) {
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return 'uploadcorrupt';
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}
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#check mime type blacklist
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global $wgMimeTypeBlacklist;
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if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist)
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&& $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
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return array( 'filetype-badmime', $mime );
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}
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}
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#check for htmlish code and javascript
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if( $this->detectScript ( $tmpfile, $mime, $this->mFinalExtension ) ) {
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return 'uploadscripted';
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}
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/**
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* Scan the uploaded file for viruses
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*/
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$virus = $this->detectVirus($tmpfile);
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if ( $virus ) {
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return array( 'uploadvirus', $virus );
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}
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wfDebug( __METHOD__.": all clear; passing.\n" );
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return true;
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}
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/**
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* Check whether the user can edit, upload and create the image
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*/
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function verifyPermissions( $user ) {
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/**
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* If the image is protected, non-sysop users won't be able
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* to modify it by uploading a new revision.
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*/
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$nt = $this->getTitle();
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if( is_null( $nt ) )
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return true;
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$permErrors = $nt->getUserPermissionsErrors( 'edit', $user );
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$permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $user );
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$permErrorsCreate = ( $nt->exists() ? array() : $nt->getUserPermissionsErrors( 'create', $user ) );
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if( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
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$permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
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$permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );
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return $permErrors;
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}
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return true;
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}
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/**
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* Check for non fatal problems with the file
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*/
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function checkWarnings() {
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$warning = array();
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$filename = $this->mLocalFile->getName();
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$n = strrpos( $filename, '.' );
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$partname = $n ? substr( $filename, 0, $n ) : $filename;
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// Check whether the resulting filename is different from the desired one
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if( $this->mDesiredDestName != $filename )
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$warning['badfilename'] = $filename;
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// Check whether the file extension is on the unwanted list
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global $wgCheckFileExtensions, $wgFileExtensions;
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if ( $wgCheckFileExtensions ) {
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if ( !$this->checkFileExtension( $this->mFinalExtension, $wgFileExtensions ) )
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$warning['filetype-unwanted-type'] = $this->mFinalExtension;
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}
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global $wgUploadSizeWarning;
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if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) )
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$warning['large-file'] = $wgUploadSizeWarning;
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if ( $this->mFileSize == 0 )
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$warning['emptyfile'] = true;
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$exists = self::getExistsWarning( $this->mLocalFile );
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if( $exists !== false )
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$warning['exists'] = $exists;
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// Check whether this may be a thumbnail
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if( $exists !== false && $exists[0] != 'thumb'
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&& self::isThumbName( $this->mLocalFile->getName() ) )
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$warning['file-thumbnail-no'] = substr( $filename , 0,
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strpos( $nt->getText() , '-' ) +1 );
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$hash = File::sha1Base36( $this->mTempPath );
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$dupes = RepoGroup::singleton()->findBySha1( $hash );
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if( $dupes )
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$warning['duplicate'] = $dupes;
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$filenamePrefixBlacklist = self::getFilenamePrefixBlacklist();
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foreach( $filenamePrefixBlacklist as $prefix ) {
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if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
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$warning['filename-bad-prefix'] = $prefix;
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break;
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}
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}
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# If the file existed before and was deleted, warn the user of this
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# Don't bother doing so if the file exists now, however
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if( $this->mLocalFile->wasDeleted() && !$this->mLocalFile->exists() )
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$warning['filewasdeleted'] = $this->mLocalFile->getTitle();
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return $warning;
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}
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/**
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* Really perform the upload.
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*/
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function performUpload( $comment, $pageText, $watch, $user ) {
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$status = $this->mLocalFile->upload( $this->mTempPath, $comment, $pageText,
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File::DELETE_SOURCE, $this->mFileProps, false, $user );
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if( $status->isGood() && $watch ) {
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$user->addWatch( $this->mLocalFile->getTitle() );
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}
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if( $status->isGood() )
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wfRunHooks( 'UploadComplete', array( &$this ) );
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return $status;
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}
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/**
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* Returns a title or null
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*/
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function getTitle() {
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if ( $this->mTitle !== false )
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return $this->mTitle;
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/**
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* Chop off any directories in the given filename. Then
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* filter out illegal characters, and try to make a legible name
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* out of it. We'll strip some silently that Title would die on.
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*/
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$basename = $this->mDesiredDestName;
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$this->mFilteredName = wfStripIllegalFilenameChars( $basename );
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/**
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* We'll want to blacklist against *any* 'extension', and use
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* only the final one for the whitelist.
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*/
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list( $partname, $ext ) = $this->splitExtensions( $this->mFilteredName );
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if( count( $ext ) ) {
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$this->mFinalExtension = $ext[count( $ext ) - 1];
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} else {
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$this->mFinalExtension = '';
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}
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/* Don't allow users to override the blacklist (check file extension) */
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global $wgCheckFileExtensions, $wgStrictFileExtensions;
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global $wgFileExtensions, $wgFileBlacklist;
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if ( $this->mFinalExtension == '' ) {
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$this->mTitleError = self::FILETYPE_MISSING;
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return $this->mTitle = null;
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} elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) ||
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( $wgCheckFileExtensions && $wgStrictFileExtensions &&
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!$this->checkFileExtension( $this->mFinalExtension, $wgFileExtensions ) ) ) {
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$this->mTitleError = self::FILETYPE_BADTYPE;
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return $this->mTitle = null;
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}
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# If there was more than one "extension", reassemble the base
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# filename to prevent bogus complaints about length
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if( count( $ext ) > 1 ) {
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for( $i = 0; $i < count( $ext ) - 1; $i++ )
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$partname .= '.' . $ext[$i];
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}
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if( strlen( $partname ) < 1 ) {
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$this->mTitleError = self::MIN_LENGTH_PARTNAME;
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return $this->mTitle = null;
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}
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$nt = Title::makeTitleSafe( NS_FILE, $this->mFilteredName );
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if( is_null( $nt ) ) {
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$this->mTitleError = self::ILLEGAL_FILENAME;
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return $this->mTitle = null;
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}
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return $this->mTitle = $nt;
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}
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function getLocalFile() {
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if( is_null( $this->mLocalFile ) ) {
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$nt = $this->getTitle();
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$this->mLocalFile = is_null( $nt ) ? null : wfLocalFile( $nt );
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}
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return $this->mLocalFile;
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}
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/**
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* Stash a file in a temporary directory for later processing
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* after the user has confirmed it.
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*
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* If the user doesn't explicitly cancel or accept, these files
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* can accumulate in the temp directory.
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*
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* @param string $saveName - the destination filename
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* @param string $tempName - the source temporary file to save
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* @return string - full path the stashed file, or false on failure
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* @access private
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*/
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function saveTempUploadedFile( $saveName, $tempName ) {
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global $wgOut;
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$repo = RepoGroup::singleton()->getLocalRepo();
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$status = $repo->storeTemp( $saveName, $tempName );
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return $status;
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}
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/**
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* Stash a file in a temporary directory for later processing,
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* and save the necessary descriptive info into the session.
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* Returns a key value which will be passed through a form
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* to pick up the path info on a later invocation.
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*
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* @return int
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* @access private
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*/
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function stashSession() {
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$status = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath );
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if( !$status->isGood() ) {
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# Couldn't save the file.
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return false;
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}
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return array(
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'mTempPath' => $status->value,
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'mFileSize' => $this->mFileSize,
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'mFileProps' => $this->mFileProps,
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'version' => self::SESSION_VERSION,
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);
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}
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/**
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* Remove a temporarily kept file stashed by saveTempUploadedFile().
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* @return success
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*/
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function unsaveUploadedFile() {
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$repo = RepoGroup::singleton()->getLocalRepo();
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$success = $repo->freeTemp( $this->mTempPath );
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return $success;
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}
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/**
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* If we've modified the upload file we need to manually remove it
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* on exit to clean up.
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* @access private
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*/
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function cleanupTempFile() {
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if ( $this->mRemoveTempFile && file_exists( $this->mTempPath ) ) {
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wfDebug( __METHOD__.": Removing temporary file {$this->mTempPath}\n" );
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unlink( $this->mTempPath );
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}
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}
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function getTempPath() {
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return $this->mTempPath;
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}
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/**
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* Split a file into a base name and all dot-delimited 'extensions'
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* on the end. Some web server configurations will fall back to
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* earlier pseudo-'extensions' to determine type and execute
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* scripts, so the blacklist needs to check them all.
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*
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* @return array
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*/
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function splitExtensions( $filename ) {
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$bits = explode( '.', $filename );
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$basename = array_shift( $bits );
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return array( $basename, $bits );
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}
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/**
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* Perform case-insensitive match against a list of file extensions.
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* Returns true if the extension is in the list.
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*
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* @param string $ext
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* @param array $list
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* @return bool
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*/
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function checkFileExtension( $ext, $list ) {
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return in_array( strtolower( $ext ), $list );
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}
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/**
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* Perform case-insensitive match against a list of file extensions.
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* Returns true if any of the extensions are in the list.
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*
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* @param array $ext
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* @param array $list
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* @return bool
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*/
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function checkFileExtensionList( $ext, $list ) {
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foreach( $ext as $e ) {
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if( in_array( strtolower( $e ), $list ) ) {
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return true;
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}
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}
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return false;
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}
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/**
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* Checks if the mime type of the uploaded file matches the file extension.
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*
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* @param string $mime the mime type of the uploaded file
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* @param string $extension The filename extension that the file is to be served with
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* @return bool
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*/
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public static function verifyExtension( $mime, $extension ) {
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$magic = MimeMagic::singleton();
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if ( ! $mime || $mime == 'unknown' || $mime == 'unknown/unknown' )
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if ( ! $magic->isRecognizableExtension( $extension ) ) {
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wfDebug( __METHOD__.": passing file with unknown detected mime type; " .
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"unrecognized extension '$extension', can't verify\n" );
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return true;
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} else {
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wfDebug( __METHOD__.": rejecting file with unknown detected mime type; ".
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"recognized extension '$extension', so probably invalid file\n" );
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return false;
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}
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$match= $magic->isMatchingExtension($extension,$mime);
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if ($match===NULL) {
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wfDebug( __METHOD__.": no file extension known for mime type $mime, passing file\n" );
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return true;
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} elseif ($match===true) {
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wfDebug( __METHOD__.": mime type $mime matches extension $extension, passing file\n" );
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#TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
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return true;
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} else {
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wfDebug( __METHOD__.": mime type $mime mismatches file extension $extension, rejecting file\n" );
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return false;
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}
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|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
|
|
}
|