I'm getting the same error for my community (with a built-in Twitter
OAuth client) running on GAE: http://v2ex.appspot.com

Traceback (most recent call last):
  File "/base/python_runtime/python_lib/versions/1/google/appengine/
ext/webapp/__init__.py", line 511, in __call__
    handler.get(*groups)
  File "/base/data/home/apps/v2ex/1.343564127440067233/t.py", line
157, in get
    statuses = twitter.GetHomeTimeline(count = 100)
  File "/base/data/home/apps/v2ex/1.343564127440067233/twitter/
twitter.py", line 1451, in GetHomeTimeline
    json = self._FetchUrl(url, parameters=parameters)
  File "/base/data/home/apps/v2ex/1.343564127440067233/twitter/
oauthtwitter.py", line 101, in _FetchUrl
    url_data = opener.open(url).read()
  File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py",
line 381, in open
    response = self._open(req, data)
  File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py",
line 399, in _open
    '_open', req)
  File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py",
line 360, in _call_chain
    result = func(*args)
  File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py",
line 1115, in https_open
    return self.do_open(httplib.HTTPSConnection, req)
  File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py",
line 1080, in do_open
    r = h.getresponse()
  File "/base/python_runtime/python_dist/lib/python2.5/httplib.py",
line 197, in getresponse
    self._allow_truncated, self._follow_redirects)
  File "/base/python_runtime/python_lib/versions/1/google/appengine/
api/urlfetch.py", line 241, in fetch
    return rpc.get_result()
  File "/base/python_runtime/python_lib/versions/1/google/appengine/
api/apiproxy_stub_map.py", line 501, in get_result
    return self.__get_result_hook(self)
  File "/base/python_runtime/python_lib/versions/1/google/appengine/
api/urlfetch.py", line 325, in _get_fetch_result
    raise DownloadError(str(err))
DownloadError: ApplicationError: 2

It was fine several days ago.

On Jul 23, 2:15 pm, nischalshetty <nischalshett...@gmail.com> wrote:
> My apphttp://www.justunfollow.comis just not able to connect to
> twitter from Google Appengine. It's most probably an app engine issue
> (none of the app engine apps seem to be able to connect to twitter),
> but nevertheless I'm writing here to see if it so happened that
> twitter has blocked access to app engine.
>
> The error says : "Could not fecth URL" for http calls made to twitter
> from google Appengine
>
> -Nischal

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