How to make extra validation in Spring Security login form?

Question

I wonder how to make extra validation on login form before it will be processed by Spring Security. I\'m thinking about some LoginController, LoginForm bean, but i don\'t kn

Answer 1

Just adding more information on top of @sdouglass comment.

On the filter you'll not have access to the form for binding purposes.

I managed to get it with default validation by doing the following.

https://gist.github.com/3137040