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From "Shapira, Yoav" <Yoav.Shap...@mpi.com>
Subject RE: Suggestions needed - customizing authorization
Date Tue, 01 Apr 2003 18:31:30 GMT

Howdy,

>Before I dive into hacking a bunch of Tomcat source
>code, I would very much like to solicit the opinions of
>some more experienced users.

I doubt you'll need to hack a bunch of tomcat source code.

>I need a form-login authorization scenario that

Authorization or authentication?

>My initial thought was to create a custom Realm, but I
>don't see a way to access the HttpServletRequest that
>is seeking authentication. Have I missed something
>there?

You can use on of the existing realms.  Create a file or database table
as outlined in the realm how-to document, containing the users and roles
you want.  Define the appropriate realm in server.xml.  Define the
security constraint elements in your web.xml.

>accomplishing what I am trying to do? Is there a way to
>access the Principal of a given request after the user
>has been authenticated?

Request.getUserPrincipal() is the servlet specification standard way to
do this.  And Request.isUserInRole() is the standard way to check if the
user is a member of a certain group.

>create a custom Principal capable of storing the other
>properties I need? Any pointers, suggestions or ideas
>would be much appreciated. Also, if you know of any
>projects that have already done this, I'd love to check
>them out so I'm not reinventing the wheel.

It's good that you don't want to re-invent the wheel.  I don't think you
have to do much coding given your requirements.

Yoav Shapira
Millennium ChemInformatics



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