\SecureFileExtension

Extension that allows a CMS user to define view access to a particular {@link Folder} and the {@link File}s within.

An access file with rewrite rules is written into the directory
once it's saved in the CMS (see ),
so that the webserver will force a rewrite on the requested assets file path,
turning it into a SilverStripe request so the file can be checked against
access settings.
Beware that this will have a performance impact on file requests that exist in
a that have been secured, as the file request will be treated
as a dynamic request instead of sent directly by the webserver as a static file.