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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Varnish folks,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m trying to combine Varnish with a Tomcat servlet to make a fancy reverse proxy. The idea is that Varnish forwards a URL to the servlet, which uses a 302 redirect to tell Varnish what the “real” URL should be. For this to work well I need Varnish to do two things: 1) cache the 302 redirects from the servlet, and also 2) hide the redirect from the client. It seems like I can get Varnish to do one or the other, but not both simultaneously.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m using the following in default.vcl (which is more or less the approach described in <a href="http://www.gossamer-threads.com/lists/varnish/dev/15409">http://www.gossamer-threads.com/lists/varnish/dev/15409</a>):<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>sub vcl_fetch {<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> if (beresp.status == 302) {<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> set req.url = beresp.http.Location;<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> restart;<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> }<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>}<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal>This works, and hides the redirect from the client, but doesn’t cache the 302 response. I also tried this:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>sub vcl_fetch {<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> if (beresp.status == 302) {<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> set req.url = beresp.http.Location;<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> return(deliver);<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> }<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>}<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal>This also works, and caches the 302 response, but does not hide the 302 from the client. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am guessing that vcl_deliver is the subroutine in which back-end responses get pushed into the cache, which means that if I hide the redirect by doing a restart, then I lose my chance to cache the 302 response.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is this right? Any suggestions as to how I can cache the 302 response and also hide the redirect from the client?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Jeff<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>