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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Replying to my own message. After some more research I realized that what I really want to do is to set a ban. I hadn’t realized that this actually allows Varnish to fetch new content and add it
to the cache, my understanding was that a ban would force Varnish to _<i>always</i>_ go to the backend for objects matching the ban.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">This is what I have added to my VCL:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">if (req.method == "BAN") {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> if (!client.ip ~ purge) {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> return(synth(403, "Not allowed"));<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> #Add the ban<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> ban("obj.http.x-url ~ " + req.http.X-Ban);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> return(synth(200, "Ban added"));<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Viktor<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:SV">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:SV"> varnish-misc-bounces+viktor.gunnarson=ericsson.com@varnish-cache.org
[mailto:varnish-misc-bounces+viktor.gunnarson=ericsson.com@varnish-cache.org] <b>
On Behalf Of </b>Viktor Gunnarson<br>
<b>Sent:</b> den 28 oktober 2014 12:18<br>
<b>To:</b> varnish-misc@varnish-cache.org<br>
<b>Subject:</b> [Varnish 4] How to purge based on regex<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I wonder how I can make Varnish 4 purge based on a regex? I’ve found old examples on how to do this in previous versions of Varnish but no example for Varnish 4.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">What I want to accomplish is basically this:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I send a PURGE request:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">PURGE /api/news/ HTTP/1.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This should then purge /api/news/ but also all url’s with query parameters (such as /api/news/?lang=en). I have tried the following without any success:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">sub vcl_recv {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> if (req.method == "PURGE") {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> return (purge);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">}<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">sub vcl_hash {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> if (req.method == "PURGE") {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> #Remove ? and everything after that<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> set req.http.purge-url = regsub(req.url, "^([/a-zA-Z0-9]*)([\?=&a-zA-Z0-9]*)", "\1" );<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> #Make sure the url ends with a /<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> if(!req.http.purge-url ~ "[.]*/$"){<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> set req.http.purge-url = regsub(req.http.purge-url, "$", "/");<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> #Make it a regex<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> set req.http.purge-url = "^" + req.http.purge-url + ".*$";<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> hash_data(req.http.purge-url);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> return (lookup);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">}<o:p></o:p></span></p>
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