java - JSF-为受限页面实现过滤器

我正在按照@balusc的回答JSF 2.0: How to get the URL that is entered in the browser's address bar来限制未登录用户的页面。
过滤器：

public class RestrictPageFilter implements Filter{
    FilterConfig fc;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        fc=filterConfig;
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest httpreq = (HttpServletRequest) request;
        HttpServletResponse httpres = (HttpServletResponse) response;
        if (httpreq.getUserPrincipal() == null) {
            httpreq.getSession().setAttribute("from", httpreq.getRequestURI());
            httpres.sendRedirect("/pages/login.xhtml");
        } else {
            chain.doFilter(request, response);
        }
    }

    @Override
    public void destroy() {
        // TODO Auto-generated method stub
    }
}

web.xml:

<security-constraint>
    <web-resource-collection>
      <web-resource-name>Admin pages</web-resource-name>
      <url-pattern>/admin/*</url-pattern>
      <url-pattern>/restricted/*</url-pattern>
      <http-method>GET</http-method>
          <http-method>POST</http-method>
    </web-resource-collection>
    <auth-constraint>
      <role-name>ADMIN</role-name>
    </auth-constraint>
  </security-constraint>

  <security-constraint>
    <web-resource-collection>
      <web-resource-name>User pages</web-resource-name>
      <url-pattern>/restricted/*</url-pattern>
      <http-method>GET</http-method>
          <http-method>POST</http-method>
    </web-resource-collection>
    <auth-constraint>
      <role-name>ADMIN</role-name>
      <role-name>USER</role-name>
    </auth-constraint>
  </security-constraint>

   <!--login-config>
     <auth-method>FORM</auth-method>
     <realm-name>jdbc-realm</realm-name>
     <form-login-config>
       <form-login-page>/pages/login.xhtml</form-login-page>
       <form-error-page>/pages/error.xhtml</form-error-page>
     </form-login-config>
   </login-config-->

    <filter>
        <filter-name>RestrictPageFilter</filter-name>
        <filter-class>gov.denis.chanceryweb5.filter.RestrictPageFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>RestrictPageFilter</filter-name>
        <url-pattern>/restricted/*</url-pattern>
    </filter-mapping>

glassfish-web.xml

<glassfish-web-app>
<security-role-mapping>
    <role-name>ADMIN</role-name>
    <group-name>ADMIN</group-name>
  </security-role-mapping>
  <security-role-mapping>
    <role-name>USER</role-name>
    <group-name>USER</group-name>
  </security-role-mapping>

glassfish gui控制台中的领域：
访问我的web应用程序时，在浏览器中我看到这是出于某种原因？为什么？

最佳答案

您将看到与基本身份验证方法关联的对话框。
您当前已将web.xml文件的登录配置元素注释掉…这样配置就不会被应用。
GlassFish 3服务器有一个默认的登录配置，当用户部署的应用程序指定了安全约束但未指定登录配置时使用该配置…
应用程序的有效登录配置实际上如下所示

  <login-config>
    <auth-method>BASIC</auth-method>
    <realm-name>file</realm-name>
  </login-config>

默认登录配置在glassfish3/glassfish/domains/<your domain name here>/config/default-web.xml中指定。