Redirect after login / logout to previous page

[vicmarconi]

Hi!

I'm trying to integrate vBulletin with my site, which was done with Rails.
I want to use vBulletin's login system to the whole site, so users won't need to login twice (forum and site).

So I'm planning putting a login box that would send user's name and password to vbulletin's login system and redirect the user back to where they submitted the form (the previous page, in my site).

For the logout procedure, I have another question besides redirection. How "logouthash" is generated? I'd like to reproduce this hash using Rails.

Thanks for your atention and sorry for my poor english.