varnish - OPTIONS response

gistfile1.txt

#compose own OPTIONS reponse
vcl_recv {
  if (req.method == "OPTIONS") {
    return(synth(750, "Options"));
  }
}

sub vcl_synth {
  if (resp.status == 750) { 
   #set resp.http.Access-Control-Allow-Origin = "*";
   set resp.http.Access-Control-Allow-Origin = req.http.Origin;
   set resp.http.Access-Control-Allow-Credentials = "true";
   set resp.http.Access-Control-Max-Age = "1728000";
   set resp.http.Access-Control-Allow-Methods = "GET, POST, PUT, DELETE, PATCH, OPTIONS";
   set resp.http.Access-Control-Allow-Headers = "Content-Type, x-requested-with, x-api-key, x-yspro, x-password, x-authorization, x-app-version";

   set resp.http.Content-Length = "0";
   set resp.http.Content-Type = "text/plain charset=UTF-8";
   set resp.status = 204;
   return(deliver);
 }
}