How to write VCL in varnish to do no caching

Question

I need to write VCL in Varnish so to prevent caching under certain conditions like cookie value.

Any idea how to do that?

Answer 1

Place the following inside your vcl_recv:

# as soon as we have a NO_CACHE cookie pass request
if (req.http.cookie ~ "NO_CACHE=") {
    return (pass);
}