One answer would be writing a Tomcat Valve that intercepts every HttpRequest
before it make it to the container. This valve would intercept the request
before your login module. I have given an example implementation. Package this
in tomcat.sar , & check out how to configure this in jboss & you are set to go.
Should not be too difficult
package test.tomcat;
|
| import java.io.IOException;
| import java.util.ArrayList;
| import java.util.List;
| import java.util.StringTokenizer;
|
| import javax.servlet.ServletException;
| import javax.servlet.http.HttpServletRequest;
|
| import org.apache.catalina.*;
|
| /**
| * The Tomcat valve that transfers credentials into a Principal object,
| * to provide seamless integration between Jaas and the J2EE security model.
| */
|
| public class MyValve implements Valve {
|
| public String getInfo() {
| return null;
| }
|
|
| /**
| * Looks for the Http headers in the originating request and creates a
| * Principal representing these if they exist.
| */
|
| public void invoke(Request request, Response response, ValveContext
valveContext)
| throws IOException, ServletException {
|
| // Ha ! Ha !...Got the request before it makes it to Login Module...
|
| HttpRequest httpRequest = (HttpRequest)request;
| HttpServletRequest httpServletRequest =
(HttpServletRequest)request.getRequest();
| List roles = new ArrayList();
| String username = (String)httpServletRequest.getHeader("myHeader");
| String rolesAsString = (String)httpServletRequest.getHeader("myList");
|
| StringTokenizer tok = new StringTokenizer(rolesAsString, ",");
| while (tok.hasMoreTokens()) {
| String token = tok.nextToken().trim();
| roles.add(token);
| }
|
| httpRequest.setUserPrincipal(new MyPrincipal(
| httpRequest.getContext().getRealm(), username, roles));
|
| // now execute all other valves
| valveContext.invokeNext(request, response);
| }
|
| }
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