我的网络应用程序使用的功能首先列出用户GoogleDrive中的所有文件。但是当驱动器包含太多文件（＆lt; 100）时，我的应用程序会因DeadlineExceededError而停止。
如何在不崩溃的情况下列出云端硬盘中的文件，我实际上需要同步列出（所有）文件，因为用户必须选择其中一个才能继续。
这是我的功能：
def retrieve_all_files(self, service):
result = []
page_token = None
while True:
try:
param = {}
if page_token:
param['pageToken'] = page_token
files = service.files().list().execute()
result.extend(files['items'])
page_token = files.get('nextPageToken')
if not page_token:
break
except errors.HttpError, error:
print 'An error occurred: %s' % error
break
return result
这是生成的错误
Traceback (most recent call last):
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1535, in __call__
rv = self.handle_exception(request, response, e)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1529, in __call__
rv = self.router.dispatch(request, response)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1278, in default_dispatcher
return route.handler_adapter(request, response)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1102, in __call__
return handler.dispatch()
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 572, in dispatch
return self.handle_exception(e, self.app.debug)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 570, in dispatch
return method(*args, **kwargs)
File "/base/data/home/apps/s~neediz-ws-splitpdf/1.377128135913812779/main.py", line 219, in work
files_list = self.retrieve_all_files(service)
File "/base/data/home/apps/s~neediz-ws-splitpdf/1.377128135913812779/main.py", line 161, in retrieve_all_files
files = service.files().list(q="mimeType='application/pdf'").execute()
File "lib/oauth2client/util.py", line 132, in positional_wrapper
return wrapped(*args, **kwargs)
File "lib/apiclient/http.py", line 716, in execute
body=self.body, headers=self.headers)
File "lib/oauth2client/util.py", line 132, in positional_wrapper
return wrapped(*args, **kwargs)
File "lib/oauth2client/client.py", line 490, in new_request
redirections, connection_type)
File "lib/httplib2/__init__.py", line 1570, in request
(response, content) = self._request(conn, authority, uri, request_uri, method, body, headers, redirections, cachekey)
File "lib/httplib2/__init__.py", line 1317, in _request
(response, content) = self._conn_request(conn, request_uri, method, body, headers)
File "lib/httplib2/__init__.py", line 1286, in _conn_request
response = conn.getresponse()
File "/base/data/home/runtimes/python27/python27_dist/lib/python2.7/gae_override/httplib.py", line 520, in getresponse
**extra_kwargs)
File "lib/httplib2/__init__.py", line 1089, in fixed_fetch
validate_certificate=validate_certificate)
File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/api/urlfetch.py", line 270, in fetch
return rpc.get_result()
File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/api/apiproxy_stub_map.py", line 612, in get_result
return self.__get_result_hook(self)
File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/api/urlfetch.py", line 375, in _get_fetch_result
rpc.check_success()
File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/api/apiproxy_stub_map.py", line 578, in check_success
self.__rpc.CheckSuccess()
File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/api/apiproxy_rpc.py", line 133, in CheckSuccess
raise self.exception
DeadlineExceededError: The API call urlfetch.Fetch() took too long to respond and was cancelled.