[Catalyst] optional login for some actions

[Sai Tong]

How, if it is possible, to allow login optionally for accessing some parts of the web application? 
I created an action for simply displaying either one of two sets of links of URL storing in a database, and I want 
to allow users to access different results of the actions,to either first sets of links or second sets of links,   
 based on whether or not the user logins (by using TT2 to post the link if the user has a particular role ).

I tried, in the App.pm, to not to force login for such action:

sub begin : Global {
        my ($self, $c) = @_;

        # don't force login 
        return 1 if ($c->req->{path} =~ /^static|optionalLoginAction/);

        # force login for all pages
        unless ($c->req->{user}) {
                $c->req->action(undef);
                $c->forward('/login/login');
        }
}

Which would work the way I want. However, if after I login and logout with username that has the role for
accessing one (out of two) set of url link, and pass the back button on the browser, the previous page
would show up from the browser's cache, which is not what I want to happen. What I need is to force 
this action to be reload every time when request of this action is called from the browser, because if
I manually reload the action with the browser's reload button, the result of this action with the correct link 
will show up.

Does anyone have any suggestion of how to accomplish this type of option login mechanism?