CBFS Filter 2020 Node.js Edition

Questions / Feedback?

IsFileFiltered Method

Checks whether a particular file or directory is covered by any filter rules.


cbfilter.isFileFiltered(fileName, [callback])


The 'callback' parameter specifies a function which will be called when the operation completes (or an error is encountered). If the 'callback' parameter is not specified, then the method will block and will not return until the operation completes (or an error is encountered).

The callback for this method is defined as:

function(err, data){ }

'err' is the error that occurred. If there was no error, then 'err' is 'null'.

'data' is the value returned by the method.

'err' has 2 properties which hold detailed information:



This method checks whether the file or directory specified by FileName is covered by any of the standard filter rules active currently (i.e., whether the class would fire its events for one or more kinds of filesystem operations performed on it). If the specified file or directory matches any of the active standard filter rules, this method returns true; otherwise, it returns false.

Applications should use this method anytime they want to create/open some file or directory from within an event handler. If this method returns true, then the file or directory must be created/opened using the class's CreateFileDirect method rather than the Windows API's CreateFile function, since the latter could trigger recursion and cause a system deadlock.

Copyright (c) 2021 Callback Technologies, Inc. - All rights reserved.
CBFS Filter 2020 Node.js Edition - Version 20.0 [Build 7917]