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From Sylvain Wallez <>
Subject Re: continuations and session
Date Thu, 02 Sep 2004 21:49:51 GMT
Leszek Gawron wrote:

> Is it possible (due to security reasons) to tie every continuation to 
> a particular user session? This way noone could "hack" into the 
> application by using an url from history. I have problems with my 
> application because it allows to run a continuation even if user has 
> logged out. If continuations were bound to a particular session 
> destroying the session would invalidate ALL of them - which is much 
> better solution than invalidating each by hand in flowscript.
> I found this problem and I really have no idea how I could fix this. 
> Right now it looks like this:

<snip what="code"/>

> The problem is : I cannot wrap <map:call continuation/> with some 
> session validator action because I do not know if this continuation 
> does not belong to login procedure (this way I would block access to 
> entering data into login form - total security ! :)).
> I would like to keep the application logic intact so every 
> /baseURL/ would show a login form first and then 
> continue to appropriate page (if user has not been authenticated before).
> Please comment.

Well, IMO the only clean way to achieve this is to have a continuations 
manager that automatically binds new continuations to the current 
session, thus making fully isolated continuation groups.

I proposed this some time ago [1] for other purposes but hadn't the time 
up to now to actually write it. Want to write it?



Sylvain Wallez                                  Anyware Technologies 
{ XML, Java, Cocoon, OpenSource }*{ Training, Consulting, Projects }

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