def main(request, response):
    headers = {
            "Cache-Control": "no-store",
            "Access-Control-Allow-Headers": "X-Requested-With",
            "Access-Control-Max-Age": 0,
            "Access-Control-Allow-Origin": "*",
            "Access-Control-Allow-Methods": "*",
            "Vary": "Accept-Encoding",
            "Content-Type": "text/plain"
    }

    for (name, value) in headers.items():
        response.headers.set(name, value)

    response.content = "PASS"