Set cache headers for browsers by varnish.

[sreeranj s]

Hi,


Is it possible for varnish to send the "Cache-Control: no-cache, no-store,
must-revalidate" cache control response to browser, while varnish caches
the response.


Scenario is like this.

1) Backend sends cache control :Cache-Control: no-cache, no-store,
must-revalidate
2) Varnish should cache the response.
3) Browser should not cache the contents so in response from varnish it
should show
cache control :Cache-Control: no-cache, no-store, must-revalidate


I have tried using Cache-Control: no-cache, no-store, must-revalidate in
set beresp.http.Cache-Control, but this causes varnish not to cache the
responses.


Given below is the vcl_backend_response
=============================
sub vcl_backend_response {
    if (bereq.url == "/") {

        unset beresp.http.expires;
        unset beresp.http.set-cookie;
        set beresp.ttl = 3600s;
        set beresp.http.Cache-Control = "max-age=0";
        #Prevent caching of 404 and 500 errors
        if (beresp.status >= 400 && beresp.status <= 599) {
            set beresp.ttl = 0s;
        }
    }
}
=============================

Any help is highly appreciated.
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