从Django向Google API发送GET / POST请求

Question

我有一个Django 1.10项目，我必须向Google APIs发出GET / POST请求。

我已成功通过以下代码中的Google OAuth 2.0授权流程：

def a_oauth2(request):

    flow = client.flow_from_clientsecrets('client_secrets.json',
                                           scope=...,
                                           redirect_uri=)
    flow.params['access_type'] = 'offline'         # offline access
    flow.params['include_granted_scopes'] = 'true'   # incremental auth

    if 'code' not in request.GET:
        auth_uri = flow.step1_get_authorize_url()
        return HttpResponseRedirect(auth_uri)
    else:
        auth_code = request.GET['code']
        credentials = flow.step2_exchange(auth_code)
        http_auth = credentials.authorize(httplib2.Http())

这就是我被困的地方。我现在的目标是导出Google云端硬盘文档。问题是，如何检索OAuth令牌并将其传递给respective GET request？ discovery.build(...)方法如何适应故事？