JSF 2 中的 Web 过滤器如何进行？
我创建这个过滤器：
public class LoginFilter implements Filter {
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
HttpSession session = req.getSession();
if (session.getAttribute("authenticated") != null || req.getRequestURI().endsWith("login.xhtml")) {
chain.doFilter(request, response);
} else {
HttpServletResponse res = (HttpServletResponse) response;
res.sendRedirect("login.xhtml");
return;
}
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void destroy() {
}
}
这是我的结构：
然后我在 web.xml 中添加过滤器：
<filter>
<filter-name>LoginFilter</filter-name>
<filter-class>filter.LoginFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>LoginFilter</filter-name>
<servlet-name>Faces Servlet</servlet-name>
</filter-mapping>
过滤器按其应有的方式工作，但一直给我这个错误：
"Was not possible find or provider the resource, login"
此后我的 Richfaces 不再工作。
我该如何解决这个问题？或者正确创建网页过滤器？
I create this filter :
public class LoginFilter implements Filter {
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
HttpSession session = req.getSession();
if (session.getAttribute("authenticated") != null || req.getRequestURI().endsWith("login.xhtml")) {
chain.doFilter(request, response);
} else {
HttpServletResponse res = (HttpServletResponse) response;
res.sendRedirect("login.xhtml");
return;
}
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void destroy() {
}
}
This is my structure:
And then I add the filter in the web.xml:
<filter>
<filter-name>LoginFilter</filter-name>
<filter-class>filter.LoginFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>LoginFilter</filter-name>
<servlet-name>Faces Servlet</servlet-name>
</filter-mapping>
The filter works as it should but keeps giving me this error:
"Was not possible find or provider the resource, login"
And after that my richfaces doesn't works anymore.
How can I solve that ? Or create a web filter correctly ?
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（1）
传递给
sendRedirect()的任何路径相关 URL（即不以/开头的 URL）都将相对于当前请求 URI。据我所知，登录页面位于 http://localhost:8080/contextname/login.xhtml。因此，如果您访问 http://localhost:8080/contextname/pages/user/some.xhtml，那么这个重定向调用实际上会指向http://localhost:8080/contextname/pages/user/login.xhtml，我认为没有存在。再次查看浏览器地址栏中的 URL。要解决此问题，请重定向到与域相关的 URL，即以
/开头的 URL。Any path-relative URL (i.e. URLs which do not start with
/) which you pass tosendRedirect()will be relative to the current request URI. I understand that the login page is at http://localhost:8080/contextname/login.xhtml. So, if you for example access http://localhost:8080/contextname/pages/user/some.xhtml, then this redirect call will actually point to http://localhost:8080/contextname/pages/user/login.xhtml, which I think don't exist. Look at the URL in your browser address bar once again.To fix this problem, rather redirect to a domain-relative URL instead, i.e. start the URL with
/.