How do I logout in Sakai so that DistAuth cookies are deleted?

During normal logout in Sakai, only the Sakai sessions are cleared. To ensure that the DistAuth cookies are deleted, one must modify the LoginTool.java file in the sakai-2-0-1-src\login\login\src\java\org\sakaiproject\tool\login directory. An additional parameter can be added to the sakai.properties file so that the logout url is correctly referenced.

Steps involved

#1. modify the complete() method to be the following:

protected void complete(String returnUrl, Session session, Tool tool, HttpServletResponse res, String reply) throws IOException
	{
		//added info by Scott Amerson to include logout url for secureweb
				
		
		// cleanup session
		if (session != null)
		{
			session.removeAttribute(Tool.HELPER_MESSAGE);
			session.removeAttribute(Tool.HELPER_DONE_URL);
			session.removeAttribute(ATTR_MSG);
			session.removeAttribute(ATTR_RETURN_URL);
			session.removeAttribute(ATTR_CONTAINER_CHECKED);
		}

		// redirect to the done URL
		//only send user to secureweb on /logout path, not /xlogin or /login
                if (reply.equals("logout"))
		{
		String LogOutURL = ServerConfigurationService.getString("secureweb.logoutURL", "");
		res.sendRedirect(LogOutURL + res.encodeRedirectURL(returnUrl));	
		}
		else
		{	
		res.sendRedirect(res.encodeRedirectURL(returnUrl));
		}
	}

#2. Add the following secureweb logout url value to the Tomcat/sakai/sakai.properties file:

secureweb.logoutURL=https://secureweb.ucdavis.edu/form-auth/logout?

This logout url will direct Sakai to secureweb to logout the cookies properly, and redirect the user to the intended url.