You could develop a simple web service or xml-rpc routine that hits up against one of the databases. The web service could read or set the boolean discussed above. Check out the XML-RPC screencast on http://www.rubyology.com
Chris Matthieu http://www.Rubyology.com
Or you could do it with REST... which is more the rage in the rails world these days.
Scaffold resource yourself a Login model in app 2... you'd probably want user info and an expiration time (probably keep it less than a minute). Then app 1 POSTs the xml to app 2 and gets back a response with the url of the created login in the Location header.
App 1 can then redirect the user to that url and you make the logins_controller check the expiration time and then log the user in on the second system.
For security reasons, you may want to use a uid instead of the id in the redirect url. Also, you'll want to be careful that only app 1 can make that REST call to app 2.
b
christophermatthieu@gmail.com wrote: