Google API Python Client - AccessTokenRefreshError

问题

def get_code(request):
    try:
        user_info_service = get_service(request.user, 'oauth2', 'v2')
        user_info = user_info_service.userinfo().get().execute()
        if user_info and user_info.get('id'):
            request.session['cur_user'] = user_info
            return redirect('/me')
        else:
            raise NoUserIdException()
    except AccessTokenRefreshError as atrfsh:
        print atrfsh
        print traceback.print_tb(sys.exc_info()[2])
    except:
        print "This was the exception..."
        print sys.exc_info()
        auth_uri = FLOW.step1_get_authorize_url()
        print auth_uri
        return redirect(auth_uri)

def get_service(user, name, version):
    storage = Storage(CredentialsModel, 'id', user, 'credential')
    credential = storage.get()
    http = httplib2.Http()
    http = credential.authorize(http)
    service = build(name, version, http=http)
    return service

I keep getting an AccessTokenRefreshError on the user_info = user_info_service.userinfo().. line.

In the except block for AccessTokenRefreshError, it's printing 'invalid_grant'.

Upon reading the documentation for OAuth2Credentials object: http://google-api-python-client.googlecode.com/hg/docs/epy/oauth2client.client.OAuth2Credentials-class.html#authorize, I found that the credential.authorize method in get_service apparently should automatically perform a refresh of the access token.

What am I doing wrong that it's not able to refresh the access token?

回答1:

This is a workaround!

I have also been getting the same error approximately once every 10 calls to tasklists.list(), so the problem is not unique to userinfo.

The only solution that I've found is to put the API call in a retry loop. Doing an immediate retry fails, so I include a sleep before retrying. With a 45 second sleep, it works approximately 99.5% of the time.

I hope that someone can post a better solution.

来源：https://stackoverflow.com/questions/13982533/google-api-python-client-accesstokenrefresherror