question about CacheFilter

[claudiobosticco]

Hi, I just noticed that in the 13.1 SDK there's this filter configured:

        <filter-name>CacheFilterMaxExpires</filter-name>
        <filter-class>com.isomorphic.servlet.CacheFilter</filter-class>

But it doesn't seem to be documented.
Can it be used?
Is it an alternative to setting the expires param in the FileDownload servlet?

[claudiobosticco]

Hi, just bumping this - any info on CacheFilter?
Thanks in advance!

[Isomorphic]

We took a look, and CacheFilter was indeed undocumented, and we have draft documentation for it which is under review.

In a nutshell, it does something very similar to what FileDownload does (in terms of adding Expires headers and other headers to influence caching) except that it can be layered over downloads performed by other systems, including the servlet engine's own internal download engine.

You probably don't have any particular reason to use it, but you should see documentation for it appear in about 1.5 weeks.