我想从我的gae-java应用程序下载所有数据。我执行了以下命令：
appcfg.py download_data --application=jeideant --url=http://jeideant.appspot.com/remote_api --filename=tickets
我的运行环境是Windows命令行，控制台显示错误：
[INFO 2013-08-07 12:33:33,898 bulkloader.py] Logging to bulkloader-log-20130807.123333
[INFO 2013-08-07 12:33:33,898 bulkloader.py] Throttling transfers:
[INFO 2013-08-07 12:33:33,898 bulkloader.py] Bandwidth: 250000 bytes/second
[INFO 2013-08-07 12:33:33,898 bulkloader.py] HTTP connections: 8/second
[INFO 2013-08-07 12:33:33,898 bulkloader.py] Entities inserted/fetched/modified: 20/second
[INFO 2013-08-07 12:33:33,898 bulkloader.py] Batch Size: 10
[INFO 2013-08-07 12:33:33,898 bulkloader.py] Opening database: bulkloader-progress-20130807.123333.sql3
[INFO 2013-08-07 12:33:34,273 bulkloader.py] Opening database: bulkloader-results-20130807.123333.sql3
[DEBUG 2013-08-07 12:33:34,539 adaptive_thread_pool.py] [WorkerThread-0] WorkerThread: started
[DEBUG 2013-08-07 12:33:34,539 adaptive_thread_pool.py] [WorkerThread-1] WorkerThread: started
[DEBUG 2013-08-07 12:33:34,539 adaptive_thread_pool.py] [WorkerThread-2] WorkerThread: started
[DEBUG 2013-08-07 12:33:34,539 adaptive_thread_pool.py] [WorkerThread-3] WorkerThread: started
[DEBUG 2013-08-07 12:33:34,539 adaptive_thread_pool.py] [WorkerThread-4] WorkerThread: started
[DEBUG 2013-08-07 12:33:34,539 adaptive_thread_pool.py] [WorkerThread-5] WorkerThread: started
[DEBUG 2013-08-07 12:33:34,555 adaptive_thread_pool.py] [WorkerThread-6] WorkerThread: started
[DEBUG 2013-08-07 12:33:34,555 adaptive_thread_pool.py] [WorkerThread-7] WorkerThread: started
[DEBUG 2013-08-07 12:33:34,555 adaptive_thread_pool.py] [WorkerThread-8] WorkerThread: started
[DEBUG 2013-08-07 12:33:34,555 adaptive_thread_pool.py] [WorkerThread-9] WorkerThread: started
[DEBUG 2013-08-07 12:33:34,555 bulkloader.py] Configuring remote_api. url_path = /remote_api, servername = jeideant.appspot.com
[DEBUG 2013-08-07 12:33:34,555 bulkloader.py] Bulkloader using app_id: jeideant
[INFO 2013-08-07 12:33:34,555 bulkloader.py] Connecting to jeideant.appspot.com/remote_api
[ERROR 2013-08-07 12:33:34,571 bulkloader.py] Exception during authentication
Traceback (most recent call last):
File "D:\Google\google_appengine\google\appengine\tools\bulkloader.py", line 3456, in Run
self.request_manager.Authenticate()
File "D:\Google\google_appengine\google\appengine\tools\bulkloader.py", line 1343, in Authenticate
remote_api_stub.MaybeInvokeAuthentication()
File "D:\Google\google_appengine\google\appengine\ext\remote_api\remote_api_stub.py", line 740, in MaybeInvokeAuthentication
datastore_stub._server.Send(datastore_stub._path, payload=None)
File "D:\Google\google_appengine\google\appengine\tools\appengine_rpc.py", line 393, in Send
f = self.opener.open(req)
File "D:\google\Python27\lib\urllib2.py", line 404, in open
response = self._open(req, data)
File "D:\google\Python27\lib\urllib2.py", line 422, in _open
'_open', req)
File "D:\google\Python27\lib\urllib2.py", line 382, in _call_chain
result = func(*args)
File "D:\google\Python27\lib\urllib2.py", line 1214, in http_open
return self.do_open(httplib.HTTPConnection, req)
File "D:\google\Python27\lib\urllib2.py", line 1187, in do_open
r = h.getresponse(buffering=True)
File "D:\google\Python27\lib\httplib.py", line 1045, in getresponse
response.begin()
File "D:\google\Python27\lib\httplib.py", line 409, in begin
version, status, reason = self._read_status()
File "D:\google\Python27\lib\httplib.py", line 373, in _read_status
raise BadStatusLine(line)
BadStatusLine: ''
[ERROR 2013-08-07 12:33:34,571 bulkloader.py] Authentication Failed: Incorrect credentials or unsupported authentication type (e.g. OpenId).
我尝试了几种方法，但仍然会出现此错误。 请告诉我如何处理它？感谢。