We too operate a Varnish cache + JS for personalisation. Our approach
is as follows:
Normal GET request for normal public pages: unset cookie, serve cached page.
Requests for login page, admin or pages that are more personal than can
be achieved with JS: Make varnish transparent.
This is pretty simple, and works well for us. However, if you're not
able to identify the admin / login areas from the URL, then you might
find this quite hard.
Rob
David Murphy wrote:
Very helpful, thanks.
So the admin cookies are different from the simple JS cookies that provide the 'Hello <user>' value?
My understanding is that if a page is cached with unique cookie then there will be an object for every unique cookie value (tom, dick, harry etc) an as a result we'll get a low hit-rate. However, my guess is that I've misunderstood how this works, and that I'm wrong :)
Is it just the cookie name ('firstname') that is important rather than the
cookie value ('Tom') when decided whether to unset the cookie on a varnish
cached page?
Thanks, David
________________________________________
From: Richard Chiswell [[email protected]]
Sent: 20 April 2010 16:13
To: David Murphy
Cc: [email protected]
Subject: Re: Cookies - set on non-cached pages, read on all pages
Hi David,
On 20/04/2010 16:08, David Murphy wrote:
Thanks Rich
When you say ignore do you mean unset e.g.
sub vcl_recv {
//snip
unset req.http.cookie;
}
We do something like:
sub vcl_recv {
...
if (req.http.Cookie) {
set req.http.Cookie = ";" req.http.Cookie;
set req.http.Cookie = regsuball(req.http.Cookie, "; +", ";");
set req.http.Cookie = regsuball(req.http.Cookie,
";(Cookies|WeWantTo|Keep)=", "; \1=");
set req.http.Cookie = regsuball(req.http.Cookie, ";[^ ][^;]*", "");
set req.http.Cookie = regsuball(req.http.Cookie, "^[; ]+|[; ]+$", "");
if (req.http.Cookie == "") {
remove req.http.Cookie;
}
}
...
}
The Cookies|We... regular expression are for things like admin cookies
which we want to be set.
Rich
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