User authentication based on form parameters

[Hector Gonzalez <hg...@mindspring.com>]

Hi,

I have an application that has a single servlet. That servlet receives two mandatory paramenters: Screen and Action (i,e main?scree=user&action=show). I also have an xml file that describes the role that the user needs to be in in order to access the screen:

Screen     Action   Role
user       new      guest
user       create   guest
user       show     user
user       update   user
user       remove   admin
message    new      guest
message    send     user
message    view     guest
....


I would like tomcat to verify that the user is authenticated for the specified role based on this table. The role guest does not need authentication.

Thanks
Hector