Rails - Jul 2006 - Knowing when a user is logged in

I am looking into creating a website similar to a chat program.  I know 
when the user logs in.  However, the user can log out any of the 
following ways:

Logout link - This one is easy to handle
User closer browser window
User hits the back button
User loses his/her internt connection.

Is there a way within rails to handle the latter three user actions?

Thanks!

-- 
Posted via http://www.ruby-forum.com/.

Usually, the last three cases are handled with a timeout of some  
kind.  If the user''s browser doesn''t interact with the server
at all
in a specific amount of time, then the server expires the session.

Tim

On Jul 25, 2006, at 10:07 AM, Chris Rericha wrote:
> I am looking into creating a website similar to a chat program.  I  
> know
> when the user logs in.  However, the user can log out any of the
> following ways:
>
> Logout link - This one is easy to handle
> User closer browser window
> User hits the back button
> User loses his/her internt connection.
>
> Is there a way within rails to handle the latter three user actions?
>
> Thanks!
>
> -- 
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails

How do I know when the session expires?  In the case of a chat room, I
would have to update the database or something so other people in the
room see that that person is no longer in the room.

Chris

-- 
Posted via http://www.ruby-forum.com/.

You might want to use railscron to expire sessions that have not been  
updated in 20 minutes.

            - dan
-- 
Dan Kohn <mailto:dan@dankohn.com>
<http://www.dankohn.com/>  <tel:+1-415-233-1000>



On Jul 25, 2006, at 4:13 PM, Chris Rericha wrote:
> How do I know when the session expires?  In the case of a chat room, I
> would have to update the database or something so other people in the
> room see that that person is no longer in the room.
>
> Chris
>
> -- 
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails

A simple solution to expire sessions is to set expiry in controllers. E.g.,

class MyController
  session :session_expires => 2.minutes.from_now
end

While nice, this is not a great way to keep a "who''s online"
list. It''s
probably safest to keep an online status in the users table, and update it
to Time.now each time a user browses to a new page. That way
"who''s online"
resolves to User.find(:conditions => [''last_hit_server_at''
> ?'',
2.minutes.ago]).
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