const RESPONSE_SUCCESS = ` send message, downgraded `; const RESPONSE_UNEXPECTED = ` send message, error `; function handleRequest(request, response) { // avoid confusing cache behaviors response.setHeader("Cache-Control", "no-cache", false); // if the received request is not http send an error if (request.scheme === "http") { response.write(RESPONSE_SUCCESS); return; } // we should never get here; just in case, return something unexpected response.write(RESPONSE_UNEXPECTED); }