LayoutTests/imported/w3c/web-platform-tests/content-security-policy/navigate-to/support/redirect_to_post_message_to_frame_owner.py

def main(request, response):
    response.status = 302
    if "location" in request.GET:
        response.headers.set("Location", request.GET["location"])
    else:
        response.headers.set("Location", "post_message_to_frame_owner.html")