google-app-engine - Cloud Shell 上的 dev_appserver 上的 Google Cloud 存储

Question

我正在尝试使用来自 GAE 的 Google Cloud Storage，并且在部署时一切正常。但是，我无法让存储在 Google Cloud Shell 上运行的开发服务器上运行。

我正在使用 cloudstorage API，我的理解是 dev_appserver 应该访问与部署的应用程序相同的存储桶。对我来说，使用本地数据也很好。

开发服务器由 dev_appserver.py 调用。

我尝试过未记录的 default_gcs_bucket_name 标志，但没有成功。

我已使用 gcloud init 将他的 Cloud Shell 设置为与正确的项目一起工作。我也尝试过使用新的 google.cloud.storage API，但没有成功。

如果我运行此处提供的示例，则会触发与下面引用的相同的错误:App Engine and Google Cloud Storage Sample .

有人吗？

编辑:无论我提供有效还是无效的存储桶名称，我都会收到相同的错误。

应用.yaml

runtime: python27
api_version: 1
threadsafe: true

builtins:
- remote_api: on

handlers:
- url: /.*
  script: main.app

主要.py

import logging
import cloudstorage as gcs
import webapp2
from google.appengine.api import app_identity

class MainPage(webapp2.RequestHandler):
    def get(self):
        self.response.headers['Content-Type'] = 'text/plain'
        bucket_name = "xxxx-xxxxxx.appspot.com"     
        stats = gcs.listbucket('/'+bucket_name) 
        for stat in stats:
          self.response.write(repr(stat) + '')        

app = webapp2.WSGIApplication([
    ('/', MainPage),
], debug=True)

日志

INFO     2017-06-07 20:36:42,068 devappserver2.py:116] Skipping SDK update check.
INFO     2017-06-07 20:36:42,105 api_server.py:297] Starting API server at: http://0.0.0.0:38829
INFO     2017-06-07 20:36:42,110 dispatcher.py:209] Starting module "default" running at: http://0.0.0.0:8080
INFO     2017-06-07 20:36:42,111 admin_server.py:116] Starting admin server at: http://0.0.0.0:8000
ERROR    2017-06-07 20:36:54,836 api_server.py:374] Exception while handling service_name: "app_identity_service"
method: "GetAccessToken"
request: "\n7https://www.googleapis.com/auth/devstorage.full_control"
request_id: "QBrGUwjoJT"

Traceback (most recent call last):
  File "/google/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/api_server.py", line 349, in _handle_POST
    api_response = _execute_request(request).Encode()
  File "/google/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/api_server.py", line 225, in _execute_request
    make_request()
  File "/google/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/api_server.py", line 220, in make_request
    request_id)
  File "/google/google-cloud-sdk/platform/google_appengine/google/appengine/api/apiproxy_stub.py", line 131, in MakeSyncCall
    method(request, response)
  File "/google/google-cloud-sdk/platform/google_appengine/google/appengine/api/app_identity/app_identity_defaultcredentialsbased_stub.py", line 195, in _Dynamic_GetAccessToken
    'expires': now + token.expires_in,
TypeError: unsupported operand type(s) for +: 'int' and 'NoneType'

WARNING  2017-06-07 20:36:54,838 tasklets.py:468] suspended generator _make_token_async(rest_api.py:55) raised RuntimeError(TypeError("unsupported operand type(s) for +: 'int' and 'NoneType'",))
WARNING  2017-06-07 20:36:54,839 tasklets.py:468] suspended generator get_token_async(rest_api.py:224) raised RuntimeError(TypeError("unsupported operand type(s) for +: 'int' and 'NoneType'",))
WARNING  2017-06-07 20:36:54,839 tasklets.py:468] suspended generator urlfetch_async(rest_api.py:259) raised RuntimeError(TypeError("unsupported operand type(s) for +: 'int' and 'NoneType'",))
WARNING  2017-06-07 20:36:54,839 tasklets.py:468] suspended generator run(api_utils.py:164) raised RuntimeError(TypeError("unsupported operand type(s) for +: 'int' and 'NoneType'",))
WARNING  2017-06-07 20:36:54,839 tasklets.py:468] suspended generator do_request_async(rest_api.py:198) raised RuntimeError(TypeError("unsupported operand type(s) for +: 'int' and 'NoneType'",))
WARNING  2017-06-07 20:36:54,839 tasklets.py:468] suspended generator do_request_async(storage_api.py:137) raised RuntimeError(TypeError("unsupported operand type(s) for +: 'int' and 'NoneType'",))

Answer 1

按照 How the Application Default Credentials work 中的说明进行操作(条件 1.)

它涉及设置 GOOGLE_APPLICATION_CREDENTIALS 环境变量以指向有效的 json 凭据文件。对于这些测试，我刚刚创建了一个选择 App Engine 默认服务帐户的新帐户:

...而且效果很好。

根据 How the Application Default Credentials work运行 gcloud auth application-default login(条件 2.)也应该可以解决问题，但我无法使其在 Cloud Shell 上运行，它失败并出现相同的“访问 token 相关”错误: -(