Handling rewrites in Varnish http to https

sub vcl_recv{
if (req.http.host == "exampledomain.com") {
    set req.http.Location = "https://www.exampledomain.com" + req.url;
          error 750 "Permanently moved";
  }
if (  (req.http.host ~ "(?i)www.exampledomain.com") && (req.http.X-Forwarded-Proto !~ "(?i)https")     ) {
        set req.http.x-redir-url = "https://www.exampledomain.com" + req.url;
        error 751 req.http.x-redir-url;
    }
if (  (req.http.host ~ "(?i)www.exampledomain.com") && (req.http.X-Forwarded-Port == "80")     ) {
        set req.http.x-redir-url = "https://www.exampledomain.com" + req.url;
        error 751 req.http.x-redir-url;
    }
}

sub vcl_error {
        if (obj.status == 750) {
                set obj.http.location = req.http.Location;
                set obj.status = 301;
                return (deliver);
        }

        if (obj.status == 751) {
                set obj.http.Location = obj.response;
                set obj.status = 302;
                return (deliver);
        }
}