about casification

[Uday Kari]

String user = request.getRemoteUser();
 
________________________________

From: Abdelmjid HALLOUM [mailto:halloum.abdelmjid at gmail.com]
Sent: Sat 5/5/2007 12:35 AM
To: Uday Kari
Cc: khalid yatim
Subject: about casification


Hello,
I am now working to implement Single Sign On of my web application (Zimbra) in a portal (Liferay)
so when cherching I find your interessting document : http://www.ja-sig.org/wiki/display/CASC/Using+CASFilter,
I try to do the some thing :

1. in my "webapps" web-application i create a jsp page with :
<%
String user = (String)request.getSession().getAttribute("edu.yale.its.tp.cas.client.filter.user");
String redirect = generateRedirect(request, user + "@yourdomain"); 
response.sendRedirect(redirect);
%>

2.in <http://2.in/>  my "web.xml" i added CAS Filter :
<filter>
<filter-name>CAS Filter</filter-name>
 <filter-class> edu.yale.its.tp.cas.client.filter.CASFilter</filter-class>
<init-param>
<param name>edu.yale.its.tp.cas.client.filter.loginUrl</param-name>
    <param-value>https://casserver:8443/cas/login</param-value>
</init-param>
<init-param>
        <param-name>edu.yale.its.tp.cas.client.filter.validateUrl </param-name>
        <param-value> https://casserver:8443/cas/proxyValidate</param-value>
</init-param>
<init-param>
        <param-name>edu.yale.its.tp.cas.client.filter.serverName</param-name>
        <param-value>zimbraserver:80</param-value> 
</init-param>
<init-param>
        <param-name>edu.yale.its.tp.cas.client.filter.wrapRequest </param-name>
        <param-value>true</param-value>
</init-param>
</filter> 
<filter-mapping>
<filter-name>CAS Filter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

the problem is that : request.getSession().getAttribute("edu.yale.its.tp.cas.client.filter.user") returns me NULL value so i can't do redirection into my web-aplication 

Sorry for my bad english !