是否有完整的基于Django的Google日历集成示例？我正在阅读Google的示例页面，但其底部的链接已过时。

我特别在尝试使用刷新令牌，因为Google的示例仅关注如何获取访问令牌。到目前为止，这就是我所拥有的：

@staff_member_required
def authorize_access(request):
    return redirect(get_flow(request).step1_get_authorize_url())

@staff_member_required
def oauth2_callback(request):
    credentials = get_flow(request).step2_exchange(request.GET['code'])

    store = get_store()
    store.put(credentials)
    credentials.set_store(store)

    return redirect('...')

def get_flow(request):
    flow = client.flow_from_clientsecrets(os.path.join(CREDENTIAL_DIR, CLIENT_SECRET_FILE),
                                      SCOPES,
                                      redirect_uri='%s://%s/google-calendar/oauth2-callback/' % (request.META['wsgi.url_scheme'], request.META['HTTP_HOST'],))
    flow.params['access_type'] = 'offline'
    flow.params['approval_prompt'] = 'force'

    return flow

def get_store():
    return oauth2client.file.Storage(os.path.join(CREDENTIAL_DIR, ACCESS_TOKEN_FILE))

def has_valid_api_credentials():
    credentials = get_store().get()
    return credentials is not None

def build_service():
    credentials = get_store().get()

    if not credentials:
        return None
    elif credentials.access_token_expired:
        http = credentials.refresh(httplib2.Http())
        http = get_store().get().authorize(http)
    else:
        http = credentials.authorize(httplib2.Http())

    service = discovery.build('calendar', 'v3', http=http)

    return service

def create_events(rental_request):
    service = build_service()

    event = service.events().insert(...).execute()