Do I need to unset cookie in vcl_fetch if there is remove req.http.Cookie in vcl_recv?

[David Murphy]

Hello

I've been testing removing cookies from images/css/js and am a little
unclear on the difference between:


//start ==========
 sub vcl_recv {
 if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {
       remove req.http.Cookie;
  }
//end==========


and...


//start =========
sub vcl_recv {
 if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {
   unset req.http.cookie;
 }
}

sub vcl_fetch {
 if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {
   unset beresp.http.set-cookie;
 }
}
//end =========


The first example removes the cookie from
the incoming requests for these files so that these objects are
cacheable.

What I'm a bit unclear on is why the 2nd example uses 'unset' in both
vcl_recv and also when the object has been retrieved from the backend
(vcl_fetch).

I need to be 100% sure that for all image/css objects, there are no
cookies stored anywhere. Is this what the first example does, whereas
the second example 'ignores' the cookie?

Thanks for any help.

Best, David