Hi Guys, 

We are working on customizing the CAS login success flow and have run into 
a UX/browser behavior issue related to how the success view is rendered 
after authentication.

 *CAS Version: 7.3.7 ** Current Flow *User submits credentials via POST 
*/login* Authentication succeeds CAS transitions to a state created via 
createGenericLoginSuccessEndState(...) The success view is rendered as a 
direct response to the original POST request *Problem *Because the success 
page is rendered inline as a response to the POST */login* request, a 
browser refresh (F5 / Ctrl+R) triggers the standard "Confirm Form 
Resubmission" dialog. If the user confirms, the login flow re-executes — 
resubmitting credentials and potentially re-initiating authentication 
unnecessarily. The root cause is that the browser still considers the 
current page to be the result of a POST operation, rather than a GET. *Expected 
Behavior (Post/Redirect/Get)*

We would like the flow to follow the standard PRG pattern:

User submits POST /login Authentication succeeds CAS issues a redirect to a 
separate success URL The browser follows the redirect and loads the success 
page via GET Subsequent browser refreshes only repeat the GET — no 
credential resubmission, no re-execution of the login flow. *Questions 1. *Is 
there a recommended Spring Webflow mechanism within CAS to issue a redirect 
to GET request at the end of a successful login, rather than rendering a 
view inline to POST request? *2.* Has anyone implemented a custom 
post-authentication success page while preserving the PRG pattern? If so, 
what approach was taken — a custom end state, a transition action, or 
something else? *3. *Are there existing Webflow states or actions in the 
default CAS login flow that handle this redirect behavior and could be 
extended or reused instead of building from scratch? Any pointers to 
relevant documentation, flow definitions, or working examples would be 
greatly appreciated.

Thank you.
 

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