problem in creating a calendar event using gdata in appengine

I am getting a token upgrade failed error when i try to create a calendar reminder using google's gdata used in an appengine environment.

The code fragment is:

def InsertSingleEvent(calendar_service, title=None, 
                  content=None, where=None, 
                  start_time=None, end_time=None):
event = gdata.calendar.CalendarEventEntry()
event.title = atom.Title(text=title)
event.content = atom.Content(text=content)
event.where.append(gdata.calendar.Where(value_string=where))

if start_time is None:
  # Use current time for the start_time and have the event last 1 hour
  start_time = time.strftime('%Y-%m-%dT%H:%M:%S.000Z', time.gmtime())
  end_time = time.strftime('%Y-%m-%dT%H:%M:%S.000Z', time.gmtime(time.time() + 3600))
event.when.append(gdata.calendar.When(start_time=start_time, end_time=end_time))
for a_when in event.when:
    if len(a_when.reminder) > 0:
      a_when.reminder[0].minutes = minutes
    else:
      a_when.reminder.append(gdata.calendar.Reminder(hours=23))

new_event = calendar_service.InsertEvent(event, '/calendar/feeds/default/private/full')

def addreminder(request, acton_id):
    """subscribes user to an acton. Currently i don't verify if user is signed in or not
    If he isn't then weirdos"""
    acton = Acton.get_by_id(int(acton_id))
    start_time = acton.creationTime.strftime('%Y-%m-%dT%H:%M:%S.000Z')

    next_url = atom.url.Url('http', settings.HOST_NAME,
                             path='/sanjhachoolha/acton/%s/remind' % acton_id)

    calendar_service = gdata.calendar.service.CalendarService()
    gdata.alt.appengine.run_on_appengine(calendar_service,store_tokens = True, single_user_mode = True)   
    session_token = None
    auth_token = gdata.auth.extract_auth_sub_token_from_url(request.get_full_path())
    if auth_token:
        v=request.get_full_path()

        session_token = calendar_service.upgrade_to_session_token(auth_token)
    if session_token and users.get_current_user():
      calendar_service.token_store.add_token(session_token)
      InsertSingleEvent(calendar_service, title=acton.title, content=acton.description,
                      start_time=start_time)

    elif session_token:
      calendar_service.current_token = session_token
      assert err2





    authSubUrl = calendar_service.GenerateAuthSubURL(next_url,
                                                     ('http://www.google.com/calendar/feeds/',),
                                                      secure=False, session=True)

    return shortcuts.render_to_response('sc-blah.html', {'authSubUrl':authSubUrl,

                                                         })

The traceback i got is:

    Environment:

Request Method: GET
Request URL: http://sanjhachoolha-sandbox.appspot.com/sanjhachoolha/acton/6003/remind
Django Version: 1.0.2 final
Python Version: 2.5.2
Installed Applications:
['appengine_django']
Installed Middleware:
('django.middleware.common.CommonMiddleware',)



Traceback:
File "/base/data/home/apps/sanjhachoolha-sandbox/dushyanth-1.335336048913759977/django/core/handlers/base.py" in get_response
  86.                 response = callback(request, *callback_args, **callback_kwargs)
File "/base/data/home/apps/sanjhachoolha-sandbox/dushyanth-1.335336048913759977/sanjhachoolha/views.py" in addreminder
  946.         session_token = calendar_service.upgrade_to_session_token(auth_token)
File "/base/data/home/apps/sanjhachoolha-sandbox/dushyanth-1.335336048913759977/gdata/service.py" in upgrade_to_session_token
  921.                                 'body': response_body})

Exception Type: TokenUpgradeFailed at /sanjhachoolha/acton/6003/remind
Exception Value: {'status': 403L, 'body': '<HTML>\n<HEAD>\n<TITLE>Invalid AuthSub token.</TITLE>\n</HEAD>\n<BODY BGCOLOR="#FFFFFF" TEXT="#000000">\n<H1>Invalid AuthSub token.</H1>\n<H2>Error 403</H2>\n</BODY>\n</HTML>\n', 'reason': 'Non 200 response on upgrade'}

What i think is that the single use token itself is flawed. the uri for example is u'/sanjhachoolha/acton/6003/remind?auth_sub_scopes=http%3A%2F%2Fwww.google.com%2Fcalendar%2Ffeeds%2F&token=CL-e_pv3GxCCp723BQ'

Thanks in advance.

ansaurus

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problem in creating a calendar event using gdata in appengine

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