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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> <a href="mailto:varnish-misc-bounces@varnish-cache.org">varnish-misc-bounces@varnish-cache.org</a> <a href="mailto:[mailto:varnish-misc-bounces@varnish-cache.org]">[mailto:varnish-misc-bounces@varnish-cache.org]</a> <b>On Behalf Of </b>Rob S<br><b>Sent:</b> Wednesday, September 07, 2011 1:51 PM<br><b>To:</b> <a href="mailto:varnish-misc@varnish-cache.org">varnish-misc@varnish-cache.org</a><br><b>Subject:</b> Re: caching and hiding 302 redirects<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>On 07/09/2011 20:41, Stroomer, Jeff wrote: <o:p></o:p></p><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><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>...<br><br><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> Any suggestions as to how I can cache the 302 response and also hide the redirect from the client? <o:p></o:p></span></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Jeff<o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br>Jeff,<br><br>Take a look at <a href="https://www.varnish-cache.org/trac/ticket/411">https://www.varnish-cache.org/trac/ticket/411</a> - this suggests putting a restart in vcl_deliver.<br><br><br><br>Rob<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='color:#1F497D'><o:p> </o:p></span></p><div style='margin-bottom:12.0pt'><div class=MsoNormal align=center style='text-align:center'><span style='color:#1F497D'><hr size=2 width="100%" align=center></span></div></div><p class=MsoNormal>Rob,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks, this seems like exactly what I need … but I tried it, and my 302 redirects are still not getting cached. Here’s what I have in my default.vcl:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>sub vcl_hit {<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> if (obj.http.X-Cache-Redirect == "1") {<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> set req.url = obj.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'>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'> set beresp.http.X-Cache-Redirect = "1";<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> set beresp.ttl = 600s;<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> set beresp.cacheable = true;<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'>sub vcl_deliver {<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> if (resp.http.X-Cache-Redirect == "1") {<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'> unset resp.http.X-Cache-Redirect;<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'> 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>I think this is a faithful copy of what’s in the trac ticket, but updated to the current VCL syntax. If it makes a difference, I’m running the 2.1.3 version of Varnish.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Jeff<span style='color:windowtext'><o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='color:#1F497D'><o:p> </o:p></span></p></div></body></html>