fullHTMLcaching.vcl

sub vcl_recv {
    # Happens before we check if we have this in cache already.
    #
    # Typically you clean up the request here, removing cookies you don't need,
    # rewriting the request, etc.

    if (req.method != "GET" && req.method != "HEAD" && req.method != "PURGE") {
        return (pass);
    }
 
    return(hash);
}

sub vcl_backend_response {
    if (beresp.http.Content-Type ~ "text/html" && beresp.status < 400) {
        # You can set exclusive caching rules by caching everything that does not match certain URL patterns.
        # Note, you should not use both exclusive caching and inclusive caching together, choose one.
        if (bereq.url !~ "admin" || bereq.url !~ "checkout") {
            # Cache HTML pages for 1 hour.
            unset beresp.http.Set-Cookie;
            set beresp.ttl = 60m;
            set beresp.grace = 120m;
            return(deliver);        
        }
        

        # Alternatively you can use inclusive logic to only cache specific URLs.
        # This example caches the products and category pages.
        # if (bereq.url ~ "\products" || bereq.url ~ "\category") {
            # Cache HTML pages for 1 hour.
        #    unset beresp.http.Set-Cookie;
        #    set beresp.ttl = 60m;
        #    set beresp.grace = 120m;
        #    return(deliver);        
        #}
    }

    #default to mark everything else uncacheable 
    set beresp.uncacheable = true;
    set beresp.ttl = 120s;
    return(deliver);
}

sub vcl_deliver {
    # section.io default code
    #
    # Purpose: We are setting 'HIT' or 'MISS' as a custom header for easy debugging.
    if (resp.http.X-Varnish ~ "\d+\s\d+") {
       set resp.http.section-io-cache = "Hit";
    } else {
       set resp.http.section-io-cache = "Miss";
    }
}

sub vcl_hash {
    # section.io default code
    #
    # Purpose: Split cache by HTTP and HTTPS protocol.
    hash_data(req.http.X-Forwarded-Proto);
}