By using a base action as a single point of entry into your Actions, you can do this check in one place, and reuse any resources already handed to you in your base action.
You could: a) forward to some global forward
For example:
<global-forwards> <forward name="STATE__SESSION_EXPIRED" path="/sesson-expired.jsp"/> ...(removed for brevity)... <global-forwards>
b) throw an exception that you've globally configured Struts to handle (declarative exception handling)
With b you now have a declarative way to handle an expired sessions and you have full access to your resource bundle.
With either approach, you don't have to worry about whether your app is the root application (http://www.myapp.com/), or nested either by configuration or using Modules (http://www.myapp.com/go/here/for/my/app/), all cases are handled.
With a filter, you would basically have to hard code where your app goes.
For example:
- /foo.jsp
(single jsp to display some friendly error message)- /NonStruts/SessionExpiredCustomServlet
(custom servlet for dealing with sessions)- /SessionExpired.do
(forward to Struts anyway.....bad idea)Sure, you could get foo.jsp (from above) as a context-param, but I like to keep my work in one place, the struts-config.xml file.
-- James Mitchell Software Engineer / Open Source Evangelist Consulting / Mentoring / Freelance EdgeTech, Inc. http://www.edgetechservices.net/ 678.910.8017 AIM: jmitchtx Yahoo: jmitchtx MSN: [EMAIL PROTECTED]
----- Original Message ----- From: "Lee Harrington" <[EMAIL PROTECTED]>
To: "Struts Users Mailing List" <user@struts.apache.org>
Sent: Wednesday, May 18, 2005 12:07 PM
Subject: Re: Subclassing ActionForward
Ok....have a filter...it runs (use logging to determine this).
I'm stuck on how to forward to the login page.
Here's my filter code:
public void doFilter(ServletRequest request,
ServletResponse response,
FilterChain chain)
throws IOException, ServletException {try {
chain.doFilter(request, response);
//
// Ensure there is a user in the session
//
UserDTO user = (UserDTO) request.getSession().getAttribute("user");
if (user==null) {
// User is not logged in, redirect to login page
// How do I do that?
}} finally {
}
}TIA,
Lee
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