Because all apps and cas is in same domain (subdomains), then it should be 
possible that app2 accesses CAS cookie. 
So I can do 2 queries from app2 back-end:
1) Query for ticket (in this query I will put CAS cookie to header)
2) Query auth data by ticket.

Siim

teisipäev, 1. märts 2016 21:33.40 UTC+2 kirjutas Fredrik Jönsson:
>
> You can't. You need the browser to drop by the cas server to get a service 
> ticket for app2.
>
> /Fredrik
>
> -- 
> Fredrik Jönsson, M.Sc.
> System Architect
> KTH/UF/ITA/Infosys
> E-mail: [email protected] <javascript:>
> Phone: +46 8 790 6603
>
> 1 mars 2016 kl. 20:14 skrev Siim <[email protected] <javascript:>>:
>
> Hello,
>
> I tried to google for it, but didn't find any solution.
> Consider following use case.
> I have 3 apps and 1 cas:
> 1) app1.example.com
> 2) app2.example.com
> 3) app3.example.com
> 4) cas.example.com
>
> So user firstly comes to app1.example.com, so he will be redirected to 
> cas.example.com for authentication. Follows standard ticket generation 
> and validation procedure.
> But question is following: now if user moves to app2, is it possible that 
> app2 filter reads HTTP request and tries to find SSO cookie and tries to 
> validate it directly on cas.example.com?
> What I want to achive, is that there is no need to redirect user browser 
> to cas.example.com, but app2 will do that request itself.
>
> Is there such filter implemented in Java? Or should I implement such 
> fitler by myself?
>
> I would be grateful for any assistance,
> Siim
>
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