Hi :) What is the status of support for conditional backend requests?
My use case is accelerating CouchDB, which has good support for ETags, but offers no other caching opportunities. I have found [1] which leads me to think that the branch implementing this feature was merged to trunk in 2011. According to [2] (which also says, in big bold letters, "This documentation is out of date"), I should be able to see this working with the default VCL: "In the default case (i.e. if not superseded by something in VCL), a conditional request is generated during fetch with If-Modified-Since and/or If-None-Match headers whose values are taken from stale_obj's Last-Modified and/or ETag headers." [1]: https://www.varnish-cache.org/lists/pipermail/varnish-commit/2011-July/006720.html [2]: https://www.varnish-cache.org/trac/wiki/BackendConditionalRequests However, when testing with the latest Varnish from the Varnish Ubuntu repository (https://www.varnish-cache.org/installation/ubuntu), "varnish-4.0.3 revision b8c4a34", I am unable to trigger conditional backend requests in the default configuration. I have feebly tried making the VCL more explicit in that it should try to keep the ETagged versions around by setting beresp.keep explicitly, but I can't seem to effect a change in behavior. So, what is happening? Does Varnish currently support what I am looking for? What is the up to date documentation on this? Is there support for this on a branch still? How is that branch coming along? Thank you :) - Magnus Hoff _______________________________________________ varnish-misc mailing list [email protected] https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
