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我正在尝试在 Google App Engine 上使用 Google Slides API，尽管使用了 Google 代码示例（特别是用于 OAuth2 和 App Engine 上的 Slides API），但我遇到了问题。

这是我的 App Engine 代码，删除了不必要的内容（所有内容都在 main.app 中）。我正在做的是尝试从 HTML 表单中发布一个字符串，然后构建一个空白演示文稿。我已经使用了带有我原型的简单脚本的 Slides API；我现在正尝试通过 App Engine 应用程序实现这种自助服务，但让我感到困惑的是身份验证的变化。

from googleapiclient import discovery
from oauth2client import client
from oauth2client.contrib import appengine
from google.appengine.api import memcache

CLIENT_SECRETS = os.path.join(os.path.dirname(__file__), 'client_secrets.json')
MISSING_CLIENT_SECRETS_MESSAGE = """[omitted]""" % CLIENT_SECRETS    

http = httplib2.Http()
service = discovery.build('slides', 'v1', http=http)
decorator = appengine.OAuth2DecoratorFromClientSecrets(
    CLIENT_SECRETS,
    scope='https://www.googleapis.com/auth/presentations https://www.googleapis.com/auth/drive',
    message=MISSING_CLIENT_SECRETS_MESSAGE)

class SlideBuilder(webapp2.RequestHandler):

  @decorator.oauth_required
  def post(self):
    programslug = self.request.get('programid')
    presoname = str(programslug) + ' Mentors'

    presentationbody = {
        'title': presoname
    }
    presentation = service.presentations().create(body=presentationbody).execute()

我想指出的是，我直接从 API 控制台下载了最新的 client_secrets.json，因此它应该与 CLIENT_SECRETS 正确匹配。

我得到的错误（在开发服务器上；但它也在实时应用程序上）是这样的：

Traceback (most recent call last):
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1535, in __call__
    rv = self.handle_exception(request, response, e)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1529, in __call__
    rv = self.router.dispatch(request, response)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1278, in default_dispatcher
    return route.handler_adapter(request, response)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1102, in __call__
    return handler.dispatch()
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 572, in dispatch
    return self.handle_exception(e, self.app.debug)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 570, in dispatch
    return method(*args, **kwargs)
  File "/Users/jedc/pm-tools/oauth2client/contrib/appengine.py", line 644, in check_oauth
    resp = method(request_handler, *args, **kwargs)
  File "/Users/jedc/pm-tools/main.py", line 113, in post
    presentation = service.presentations().create(body=presentationbody).execute()
  File "/Users/jedc/pm-tools/oauth2client/_helpers.py", line 133, in positional_wrapper
    return wrapped(*args, **kwargs)
  File "/Users/jedc/pm-tools/googleapiclient/http.py", line 840, in execute
    raise HttpError(resp, content, uri=self.uri)
HttpError: <HttpError 401 when requesting https://slides.googleapis.com/v1/presentations?alt=json returned "Request is missing required authentication credential. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.">

感觉就像我在这里做的一些微妙但愚蠢的事情。我将不胜感激任何帮助或指示以弄清楚那是什么！

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1 回答 1

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发生此错误是因为您的 http 未获得凭据授权。要使用凭据授权 http，您应该使用装饰器。

decorator = appengine.OAuth2DecoratorFromClientSecrets(
    CLIENT_SECRETS,
    scope='https://www.googleapis.com/auth/presentations https://www.googleapis.com/auth/drive',
    message=MISSING_CLIENT_SECRETS_MESSAGE)
http = decorator.http()
service = discovery.build('slides', 'v1', http=http)

这将解决您的问题。如需进一步参考，请阅读Google 提供的此应用引擎装饰器文档

于 2017-03-10T04:45:12.530 回答