normalize request params & strip cookies in varnish

recv.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.url ~ "^/$" ||
         req.url ~ "^/(frauen|maenner|kinder|outlet|marke)(/.+)?" ||
         req.url ~ "^/api/(seen2bought/|similarProduct/|product\?)" ||
         req.url ~ "\.(css|js)\?.*" ||
         req.url ~ "\.(png|gif|jpg|ico|js|css|xml|pdf|woff|ttf)$" ||
    ) && req.method == "GET") {
    
        # Normalize the query parameters
        set req.url = std.querysort(req.url);
        
        # Strip the cookies
        unset req.http.cookie;
        
        return(hash);
    } else {
        return(pass);
    }
}