> anyone can easily overcome the
> ominous resistance for those documents to be understood.

In all fairness, most open source project documentation suffers more
from incompleteness and factual errors than obscurity.  But it
doubtless has the same effect on the reader, though, of causing
confusion instead of enlightenment.

> the subject still leaves me
> confused with the browser never sending the cookie to the webapp but to CAS
> instead.  How does the webapp know when to redirect the browser to the CAS
> login page?

A CAS-enabled application _always_ redirects to the CAS login page on
a new session.  It's that simple.  You only see the login form if you
don't currently have a valid SSO session or you have to reauthenticate
(e.g. renew=true) for some other reason.  Once you have a valid SSO
session, CAS issues a redirect to the original application with a
ticket parameter appended to the request URL.  The CAS client securing
the application extracts the ticket and validates it out of band from
the browser.

M

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