Your app server should set the Vary on *all* responses if *any* response can vary.
Ric On Dec 4, 2008, at 11:59 AM, Jeff Anderson wrote: > Our app servers are sending the Vary on the Accept-Encoding when > compression is requested. If compression is not requested they do not > perform the Vary. Does that mean we should find a way to send a Vary: > Accept-Encoding: null,gzip,deflate or something? Is there a 'no > compression' accept-encoding header? > > > On Dec 2, 2008, at 10:36 PM, Per Buer wrote: > >> Jeff Anderson skrev: >>> It looks like if the first requested page is for an uncompressed >>> page >>> varnish will only deliver the uncompressed page from cache even if a >>> compressed page is requested. >> >> As long as you don't Vary: on the Accept-Encoding I guess that is >> expected. Varnish doesn't not understand the Accept-Encoding header. >> >>> (..) >>> What could be causing this? The only way to fix appears to be to >>> add >>> the lines below: >>> >>> sub vcl_hash { >>> if (req.http.Accept-Encoding ~ "gzip" || req.http.Accept-Encoding ~ >>> "deflate") { >>> set req.hash += req.http.Accept-Encoding; >>> } >> >> Either use the fix you suggested or add a Vary: Accept-Encoding on >> the >> backend. >> >> -- >> Per Buer - Leder Infrastruktur og Drift - Redpill Linpro >> Telefon: 21 54 41 21 - Mobil: 958 39 117 >> http://linpro.no/ | http://redpill.se/ >> >> _______________________________________________ >> varnish-misc mailing list >> varnish-misc@projects.linpro.no >> http://projects.linpro.no/mailman/listinfo/varnish-misc > > _______________________________________________ > varnish-misc mailing list > varnish-misc@projects.linpro.no > http://projects.linpro.no/mailman/listinfo/varnish-misc _______________________________________________ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc