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 _always_ go to the backend for objects matching
the ban.
This is what I have added to my VCL:
if (req.method == "BAN") {
if (!client.ip ~ purge) {
return(synth(403, "Not allowed"));
}
#Add the ban
ban("obj.http.x-url ~ " + req.http.X-Ban);
return(synth(200, "Ban added"));
}
Best regards,
Viktor
From: varnish-misc-bounces+viktor.gunnarson=ericsson....@varnish-cache.org
[mailto:varnish-misc-bounces+viktor.gunnarson=ericsson....@varnish-cache.org]
On Behalf Of Viktor Gunnarson
Sent: den 28 oktober 2014 12:18
To: [email protected]
Subject: [Varnish 4] How to purge based on regex
Hi,
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.
What I want to accomplish is basically this:
I send a PURGE request:
PURGE /api/news/ HTTP/1.1
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:
sub vcl_recv {
if (req.method == "PURGE") {
return (purge);
}
}
sub vcl_hash {
if (req.method == "PURGE") {
#Remove ? and everything after that
set req.http.purge-url = regsub(req.url,
"^([/a-zA-Z0-9]*)([\?=&a-zA-Z0-9]*)", "\1" );
#Make sure the url ends with a /
if(!req.http.purge-url ~ "[.]*/$"){
set req.http.purge-url = regsub(req.http.purge-url, "$", "/");
}
#Make it a regex
set req.http.purge-url = "^" + req.http.purge-url + ".*$";
hash_data(req.http.purge-url);
return (lookup);
}
}
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