pub fn status_code_response(
status_code: &StatusCode,
headers: Option<&HashMap<String, Option<String>>>,
request_headers: &HeaderMap,
) -> Result<Response<BoxBody>, Error>Expand description
custom status code response (body is empty)
headers are applied last, after the status is set, so an explicit
header always wins over anything ResponseHandler would otherwise
infer (RFC 045: an explicitly configured header wins over an
inferred default).