I have my own Web application that maintains the session tokens for
our Google Calendar users.
With 1.2.*, AuthSub token management changed as per 2nd link:
  http://code.google.com/p/gdata-python-client/wiki/AuthOnAppEngine
  http://code.google.com/p/gdata-python-client/wiki/HTTPRequestRefactoring
The former talks about token store design for AppEngine.  The latter
mentions more about Token Management.

My question is how to use the GDataService APIs since it now has its
own token_store.  I have session tokens (string along with scopes)
saved in my own database. Periodically, from day to day, I connect on
behalf of all users who have granted permission in our Web app service
to fetch updates of their calendars.  So, I tried to do the following,
after retrieving session_token_string from database for each user.

calendar_service = gdata.calendar.service.CalendarService()
calendar_service.SetAuthSubToken(session_token_string, ['http://
www.google.com/calendar/feeds/'])
#check if AuthSub is valid
calendar_service.AuthSubTokenInfo()

When calling AuthSubTokenInfo, I get the following exception:
<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>

I've looked around at all the documentation on Google Data API
including the guides on AuthSub to try to understand how the new
changes affect using gdata.py but am clearly missing some critical
information.  The documentation has been helpful on acquiring a single
use token, conversion to session token and use of the session token a
query if this whole flow is done in one session.  However, for a
daemon process that then tries to use this session token periodically
to scan for new updates, there is clearly something missing from aside
from calling SetAuthSubToken.

Any suggestions on what I might be doing wrong?

Alison

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