Errors

async function handle(res) {
  if (res.ok) return res.status === 204 ? null : (await res.json()).data;

  const { error } = await res.json().catch(() => ({ error: {} }));

  switch (res.status) {
    case 401:
      // Do not repeat: the token will not get better on its own. Alert whoever operates it.
      throw new CredentialError(error.code, error.message);

    case 403:
    case 404:
    case 409:
    case 422:
      // Final: repeating gives the same result. Fix the call.
      throw new RequestError(error.code, error.message, error.details);

    case 429:
      throw new TemporaryError(Number(res.headers.get('Retry-After') ?? 60));

    default:
      // 5xx: server failure. A retry with increasing backoff is worth it.
      throw new TemporaryError(5);
  }
}

def handle(res):
    if res.ok:
        return None if res.status_code == 204 else res.json().get("data")

    error = res.json().get("error", {}) if res.content else {}

    if res.status_code == 401:
        raise CredentialError(error.get("code"), error.get("message"))

    if res.status_code in (403, 404, 409, 422):
        raise RequestError(error.get("code"), error.get("message"), error.get("details"))

    if res.status_code == 429:
        raise TemporaryError(int(res.headers.get("Retry-After", 60)))

    raise TemporaryError(5)