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Jakarta Struts Cookbook
book

Jakarta Struts Cookbook

by Bill Siggelkow
February 2005
Intermediate to advanced content levelIntermediate to advanced
528 pages
12h 53m
English
O'Reilly Media, Inc.
Content preview from Jakarta Struts Cookbook

11.6. Ensuring Security Across Your Entire Application

Problem

You need to verify the user is logged in and authenticated when a request is received for any URL path of your web application.

Solution

Use an authentication servlet filter, such as the one in Example 11-10, which checks for a User object in the session.

Example 11-10. A servlet filter that checks if the user is logged in

package com.oreilly.strutsckbk.ch11.ams; import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; public class AuthenticationFilter implements Filter { private String onFailure = "logon.jsp"; private FilterConfig filterConfig; public void init(FilterConfig filterConfig) throws ServletException { this.filterConfig = filterConfig; onFailure = filterConfig.getInitParameter("onFailure"); } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletRequest req = (HttpServletRequest) request; HttpServletResponse res = (HttpServletResponse) response; // if the requested page is the onFailure page continue // down the chain to avoid an infinite redirect loop if (req.getServletPath( ).equals(onFailure)) { chain.doFilter(request, ...
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Publisher Resources

ISBN: 059600771XSupplemental ContentErrata Page