为 google OAuth2.0 检索 refresh_token

如何解决为 google OAuth2.0 检索 refresh_token

正如 doc 所提到的,

  # Save credentials back to session in case access token was refreshed.
  # ACTION ITEM: In a production app,you likely want to save these
  #              credentials in a persistent database instead.
  flask.session['credentials'] = credentials_to_dict(credentials)

“生产应用程序,您可能希望将这些凭据保存在持久数据库中”。但是,访问令牌更改 periodically 导致我的代码:

@blueprint.route("Calendar",methods=['GET','POST'])
def Calendar():
    user = User.query.filter_by(email=email).first()  
    
    with open('client_secret.json') as d:
        d = json.load(d)
    thecredentials = { 
        'client_id': d['web']['client_id'],'client_secret':d['web']['client_secret'],'refresh_token':None,'scopes':None,'token':user.token,'token_uri':d['web']['token_uri']
    }
    print(thecredentials) #prints all the credentials successfully 
    credentials = google.oauth2.credentials.Credentials(
        **credentials)
    thecredentials = credentials_to_dict(credentials)
    service = build('calendar','v3',credentials=credentials)
    events_result =service.calendarList().list().execute()

def credentials_to_dict(credentials):
      return {'token': credentials.token,'refresh_token': credentials.refresh_token,'token_uri': credentials.token_uri,'client_id': credentials.client_id,'client_secret': credentials.client_secret,'scopes': credentials.scopes}

遇到:

Traceback (most recent call last):
  File "/Users/Daniyal/Startup/Website/env/lib/python3.8/site-packages/flask/app.py",line 2464,in __call__
    return self.wsgi_app(environ,start_response)
  File "/Users/Daniyal/Startup/Website/env/lib/python3.8/site-packages/flask/app.py",line 2450,in wsgi_app
    response = self.handle_exception(e)
  File "/Users/Daniyal/Startup/Website/env/lib/python3.8/site-packages/flask/app.py",line 1867,in handle_exception
    reraise(exc_type,exc_value,tb)
  File "/Users/Daniyal/Startup/Website/env/lib/python3.8/site-packages/flask/_compat.py",line 39,in reraise
    raise value
  File "/Users/Daniyal/Startup/Website/env/lib/python3.8/site-packages/flask/app.py",line 2447,in wsgi_app
    response = self.full_dispatch_request()
  File "/Users/Daniyal/Startup/Website/env/lib/python3.8/site-packages/flask/app.py",line 1952,in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/Users/Daniyal/Startup/Website/env/lib/python3.8/site-packages/flask/app.py",line 1821,in handle_user_exception
    reraise(exc_type,line 1950,in full_dispatch_request
    rv = self.dispatch_request()
  File "/Users/Daniyal/Startup/Website/env/lib/python3.8/site-packages/flask/app.py",line 1936,in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/Users/Daniyal/Startup/Website/app/base/routes.py",line 407,in Calendar
    events_result =service.calendarList().list().execute()
  File "/Users/Daniyal/Startup/Website/env/lib/python3.8/site-packages/googleapiclient/_helpers.py",line 134,in positional_wrapper
    return wrapped(*args,**kwargs)
  File "/Users/Daniyal/Startup/Website/env/lib/python3.8/site-packages/googleapiclient/http.py",line 900,in execute
    resp,content = _retry_request(
  File "/Users/Daniyal/Startup/Website/env/lib/python3.8/site-packages/googleapiclient/http.py",line 177,in _retry_request
    resp,content = http.request(uri,method,*args,**kwargs)
  File "/Users/Daniyal/Startup/Website/env/lib/python3.8/site-packages/google_auth_httplib2.py",line 216,in request
    self.credentials.refresh(self._request)
  File "/Users/Daniyal/Startup/Website/env/lib/python3.8/site-packages/google/oauth2/credentials.py",line 194,in refresh
    raise exceptions.RefreshError(
google.auth.exceptions.RefreshError: The credentials do not contain the necessary fields need to refresh the access token. You must specify refresh_token,token_uri,client_id,and client_secret.

问题:

  1. 如果用户的访问令牌每次都会改变,那么存储到持久数据库有什么意义?
  2. 错误是因为用户令牌已过时(它是)还是其他原因?导致错误似乎表明它不是。

在深入研究 docs 后,我意识到开发人员最有可能将刷新令牌保存到数据库中,因为它们的寿命更长。

但是,我的凭据是这样的:

{
  'client_id': '3118..vc2n.apps.googleusercontent.com','client_secret': 'imMySiOXTb...R2w','refresh_token': None,'scopes': None,'token': 'ya29.a0Af...Oyi4JLHqi','token_uri': 'https://oauth2.googleapis.com/token'
}

我找不到任何关于如何检索刷新令牌的文档或代码片段,正如对 SO 的评论所说。

此外,作为样板代码 show,访问令牌保存在会话中(当用户在会话中时)并在我的 chrome 扩展程序请求用户的数据时很快过期用户一直在会话中,但在用户注册时仅进行一次身份验证。

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