How sessions work in MoinMoin

Sessions in MoinMoin are implemented using a special session handler that can be configured in `cfg.session_handler`. By default, an instance of the class `MoinMoin.session.DefaultSessionHandler` is used for managing sessions.

Code using the session framework currently includes:

Session related configuration

cookie_domain

`None`

Domain used in the session cookie.

cookie_path

`None`

Path used in the session cookie.

cookie_lifetime

`12`

=0: forever, ignore user 'remember_me' setting; >0: n hours, or forever if user checked 'remember_me'; <0 -n hours, ignore user 'remember_me' setting

anonymous_session_lifetime

undefined

Set this to a non-zero value to enable anonymous sessions (can be fractional) [hours].

(!) If you run a wiki farm and you want to share the session cookie between farm wikis, you want to change `cookie_domain` and/or `cookie_path`.

(!) If you want anonymous users to get session features (e.g. a trail), set `anonymous_session_lifetime`.

Replacing session storage

Should you wish to store session data somewhere other than the filesystem cache Moin uses, you can use the `DefaultSessionHandler` along with a different class descending from `DefaultSessionData`. See `MoinMoin/session.py` for more details.

It is also possible but not recommended to use a different session handler altogether.

Session example code

As an extension programmer, in order to use session variables, you can use `request.session` like a dict, values stored there are automatically saved and restored if a session is available. Some more advanced usage is possible, see `MoinMoin.session.SessionData` in the file `MoinMoin/session.py`.

Here's an example macro using the session code: 

   1 # -*- coding: iso-8859-1 -*-
   2 
   3 """
   4     Tests session state.
   5 """
   6 
   7 Dependencies = ['time']
   8 
   9 def execute(macro, args):
  10     if macro.request.session.is_new:
  11         return macro.formatter.text('Not storing any state until you send a cookie.')
  12     if 'test' in macro.request.session:
  13         return macro.formatter.text("Loaded value %d" % macro.request.session['test'])
  14     import random
  15     value = random.randint(1, 100000)
  16     macro.request.session['test'] = value
  17     return macro.formatter.text("Set to value %d" % value)