AssertionError:找不到服务"urlfetch"的api代理

Question

我正在使用stripeAPI与Stripe服务交谈.谷歌AppEngine甚至没有导入或涉及到这里,但我看到这AssertionError与GAE库有关.下面是堆栈跟踪.什么可能出错？

$ python stripe_export.py 
Traceback (most recent call last):
  File "stripe_export.py", line 99, in <module>
    etl_customers()
  File "stripe_export.py", line 72, in etl_customers
    customers = fetch_data(stripe.Customer)
  File "stripe_export.py", line 54, in fetch_data
    _list_obj = cls.all(limit=page_size)
  File "/Library/Python/2.7/site-packages/stripe/resource.py", line 332, in all
    response, api_key = requestor.request('get', url, params)
  File "/Library/Python/2.7/site-packages/stripe/api_requestor.py", line 140, in request
    method.lower(), url, params, headers)
  File "/Library/Python/2.7/site-packages/stripe/api_requestor.py", line 249, in request_raw
    method, abs_url, headers, post_data)
  File "/Library/Python/2.7/site-packages/stripe/http_client.py", line 160, in request
    payload=post_data
  File "/usr/local/google_appengine/google/appengine/api/urlfetch.py", line 268, in fetch
    rpc = create_rpc(deadline=deadline)
  File "/usr/local/google_appengine/google/appengine/api/urlfetch.py", line 224, in create_rpc
    return apiproxy_stub_map.UserRPC('urlfetch', deadline, callback)
  File "/usr/local/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 414, in __init__
    self.__rpc = CreateRPC(service, stubmap)
  File "/usr/local/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 68, in CreateRPC
    assert stub, 'No api proxy found for service "%s"' % service
AssertionError: No api proxy found for service "urlfetch"

Answer 1

这看起来像你运行unittests并尝试从测试中调用urlfetch.

我在胜利时做同样的事情,然后我得到以下转储:

File "C:\Program Files (x86)\Google\google_appengine\google\appengine\api\urlfetch.py", line 268, in fetch
rpc = create_rpc(deadline=deadline)
File "C:\Program Files (x86)\Google\google_appengine\google\appengine\api\urlfetch.py", line 224, in create_rpc
return apiproxy_stub_map.UserRPC('urlfetch', deadline, callback)
File "C:\Program Files (x86)\Google\google_appengine\google\appengine\api\apiproxy_stub_map.py", line 414, in __init__
self.__rpc = CreateRPC(service, stubmap)
File "C:\Program Files (x86)\Google\google_appengine\google\appengine\api\apiproxy_stub_map.py", line 68, in CreateRPC
assert stub, 'No api proxy found for service "%s"' % service
AssertionError: No api proxy found for service "urlfetch"

除了dirnames之外,在Unix/Win之间没有区别,但是在两种情况下都来自apiproxy_stub_map.py,我假设你是从unittests运行的.

我的单元测试解决这个问题的方法是执行以下操作,也许这适用于您的问题:

在TestCase中包括testbed激活,去激活和urlfetch存根调用,例如:

@classmethod
def setUpClass(cls):
    cls.testbed = testbed.Testbed()
    cls.testbed.activate()
    cls.testbed.init_datastore_v3_stub()
    cls.testbed.init_memcache_stub()
    cls.testbed.init_urlfetch_stub()

@classmethod
def tearDownClass(cls):
    cls.testbed.deactivate()

该调用cls.testbed.init_urlfetch_stub()为我启动了激活urlfetch服务的技巧.

在docs中,列出了使用单元测试时必须调用的不同服务的所有存根:https://cloud.google.com/appengine/docs/python/tools/localunittesting