回调Lambda有时接收{'code':'','state':'my-correct-state'}

Question

我将AWS Cognito与托管UI一起使用,我将Lambda回调(由AWS调用)收到的交换收到code令牌.它工作,但有时在日志中我看到event如下所示:

 {'code': '', 'state': '305598223734340355033510307010'}

也许通过谷歌,亚马逊或Facebook认证有些问题...我不知道如何检查一些东西.

我的一部分auth_cognito.py:

payload = {
  'grant_type': 'authorization_code',
  'client_id': client_id,
  'code': event['code'],
  'redirect_uri': url_redirect
}

tryis = 3
tokens: typing.Dict[str, str] = {}
while 'id_token' not in tokens and tryis > 0:
  # Retry for case when resp == {'error': 'Internal Error'}; TODO use SDK?
  tryis -= 1
  tokens = botocore.vendored.requests.post(
    url='https://intelligentspeaker.auth.us-east-1.amazoncognito.com/oauth2/token',
    headers={'Content-Type': 'application/x-www-form-urlencoded'},
    data=payload).json()

try:
  id_token_gwt = _get_payload_json(tokens['id_token'])
except KeyError:
  print(f'ERROR: KeyError - no `id_token` in this json: {tokens}', file=sys.stderr)