How to Callback a DirectLink?

["matthew c. mead" <m-...@goof.com>]

Ok, I've got a handle on how to seamlessly handle an expired session (or 
logged out user) using the ExternalService to activate a page.  I simply 
use an ExternalCallback to do so.

However, I have a page class that both displays a form as well as 
streams a file to the client web browser.  This all works grand if the 
user is and stays logged in.  However, if they do not, only the External 
service can successfully activate the page.  The link to stream the file 
to the client is a DirectLink, and it uses a parameter to specify which 
file.  When pageValidate() is called to see if the user is logged in, 
there are no service parameters when the DirectLink is used to access 
the page.

How can I perform a callback to include the service parameters to a page 
that is activated by the DirectService?

Is there another way to make this stateless that I should be using?  I 
can't seem to find any docs on staying as stateless as possible while 
forcing a user to be logged in by storing something in the Visit 
object.  I'd like page activations to work properly regardless of 
whether they were logged into the application before following the link.


Thanks!



-matt

-- 
matthew c. mead

http://www.goof.com/