Using Google API Refresh Token in Python

问题

I made a personal use app that just queries my gmail for a certain type of email. The app is successfully running on a pi night and day making requests to the Gmail service every thirty seconds.

However every week or so I get this error:

messages = gmail.users().messages().list(userId='me').execute() # 
q='is:unread'
File "C:\Users\rexma\Anaconda3\envs\stan_env\lib\site- 
packages\oauth2client\_helpers.py", line 133, in positional_wrapper
return wrapped(*args, **kwargs)
File "C:\Users\rexma\Anaconda3\envs\stan_env\lib\site- 
packages\googleapiclient\http.py", line 839, in execute
method=str(self.method), body=self.body, headers=self.headers)
File "C:\Users\rexma\Anaconda3\envs\stan_env\lib\site- 
packages\googleapiclient\http.py", line 166, in _retry_request
resp, content = http.request(uri, method, *args, **kwargs)
File "C:\Users\rexma\Anaconda3\envs\stan_env\lib\site- 
packages\oauth2client\transport.py", line 186, in new_request
credentials._refresh(orig_request_method)
File "C:\Users\rexma\Anaconda3\envs\stan_env\lib\site- 
packages\oauth2client\client.py", line 761, in _refresh
self._do_refresh_request(http)
File "C:\Users\rexma\Anaconda3\envs\stan_env\lib\site- 
packages\oauth2client\client.py", line 819, in _do_refresh_request
raise HttpAccessTokenRefreshError(error_msg, status=resp.status)
oauth2client.client.HttpAccessTokenRefreshError: invalid_grant: Token has 
been expired or revoked.

Which forces me to go back in, delete my old credentials and rerun the authorization. I've tried to do the other fixes online like setting

flow.authorization_url(access_type = 'offline', approval_prompt='force')

But the 'OAuth2WebServerFlow' object has no attribute 'authorization_url'.

Here is my full authorization code:

def authenticate(CLIENT_SECRET_FILE, APPLICATION_NAME, SCOPE, credential_name):
home_dir = os.path.expanduser('~')
credential_dir = os.path.join(home_dir, '.credentials')

if not os.path.exists(credential_dir):
    os.makedirs(credential_dir)

credential_path = os.path.join(credential_dir, credential_name)

store = Storage(credential_path)
credentials = store.get()

if not credentials or credentials.invalid:
    flow = flow_from_clientsecrets(CLIENT_SECRET_FILE, SCOPE)
    flow.user_agent = APPLICATION_NAME
    # flow.authorization_url(access_type='offline', approval_prompt='force')
    credentials = run_flow(flow, store)

return credentials

I'm definitely still a scrub with OAuth2, even having read this. I just want to know how I can have my app use the refresh token in the json credentials to keep running without expiring.

Any help is much appreciated.

来源：https://stackoverflow.com/questions/49709197/using-google-api-refresh-token-in-python

标签

python

google-api

refresh-token

facesservlet