Does Varnish uses ETag?

[Kurt Kraut]

Hi,

ETag (http://en.wikipedia.org/wiki/HTTP_ETag) was created to allow the
verification if the content has changed without even downloading it. It
would be smart to a cache like Varnish to check the ETag of URLs at backend
from time to time to check if they have changed and then the cached version
and wait for a client to request it, providing a newer version of a JPEG or
CSS for instance.

Does Varnish used ETag to check cache freshness?

- If yes, how does it behave?
- If not, is it possible to achive through VCL?


Thanks in advance.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.varnish-cache.org/lists/pipermail/varnish-misc/attachments/20110707/4672e8b7/attachment-0003.html>