In my web app I have a need to verify that there is an authenticated user with appropriate privileges before displaying any page in the app. If there is not an authenticated user, then I need to display an appropriate warninginsufficient privileges page. Currently the way I have implemented this is to write a base controller class that provides the __before__ method which is then used as the parent class for all other controllers in the app. However, I've run into the issue that from the __before__ method you cannot simply return content, and have it displayed to the user. It appears that you have to do a redirect_to, which ends up doing a redirect and changing the URL. What I would like to do is render a page from the __before__ method, and have that be what is displayed to the user(similar to the way that HTTP exceptions are handled). Is there a way to do this??
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