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jsf - JSF 中的 Web 过滤器

转载 作者:行者123 更新时间:2023-12-03 02:49:58 25 4
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我正在通过引用 this link 来实现网页过滤器

我的代码是

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>project_name</display-name>
<welcome-file-list>
<welcome-file>/project_name/faces/jsp/HomePage.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
<context-param>
<description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
<context-param>
<param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
<param-value>resources.application</param-value>
</context-param>

<context-param>
<param-name>org.richfaces.CONTROL_SKINNING</param-name>
<param-value>enable</param-value>
</context-param>
<context-param>
<param-name>org.richfaces.LoadScriptStrategy</param-name>
<param-value>ALL</param-value>
</context-param>
<context-param>
<param-name>org.richfaces.LoadStyleStrategy</param-name>
<param-value>ALL</param-value>
</context-param>
<context-param>
<param-name>org.ajax4jsf.DEFAULT_EXPIRE</param-name>
<param-value>2764800</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.ERROR_HANDLING</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<param-name>org.ajax4jsf.handleViewExpiredOnClient</param-name>
<param-value>true</param-value>
</context-param>

<filter>
<display-name>RichFaces Filter</display-name>
<filter-name>richfaces</filter-name>
<filter-class>org.ajax4jsf.Filter</filter-class>
<init-param>
<param-name>createTempFiles</param-name>
<param-value>false</param-value>
</init-param>
<init-param>
<param-name>maxRequestSize</param-name>
<param-value>20000000</param-value>
</init-param>
<init-param>
<param-name>enable-cache</param-name>
<param-value>true</param-value>
</init-param>


</filter>

<filter>
<filter-name>loginFilter</filter-name>
<filter-class>com.common.LoginFilter</filter-class>
</filter>

<filter-mapping>
<filter-name>loginFilter</filter-name>
<url-pattern>/faces/*</url-pattern>
</filter-mapping>

<filter-mapping>
<filter-name>richfaces</filter-name>
<servlet-name>Faces Servlet</servlet-name>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
<dispatcher>INCLUDE</dispatcher>
</filter-mapping>

<listener>
<listener-class>com.sun.faces.config.ConfigureListener</listener-class>
</listener>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.jsf</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.faces</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>Resource Servlet</servlet-name>
<servlet-class>org.primefaces.resource.ResourceServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Resource Servlet</servlet-name>
<url-pattern>/primefaces_resource/*</url-pattern>
</servlet-mapping>
</web-app>

LoginFilter.class

public class LoginFilter implements Filter {

@Override
public void init(FilterConfig config) throws ServletException {
// If you have any <init-param> in web.xml, then you could get them
// here by config.getInitParameter("name") and assign it as field.
}

@Override
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
System.out.println("Inside Login Filter");
HttpServletRequest request = (HttpServletRequest) req;
HttpServletResponse response = (HttpServletResponse) res;
HttpSession session = request.getSession(false);
System.out.println("session..."+ session);
if (session == null || session.getAttribute(IConstants.HAS_USER_ID) == null) {
response.sendRedirect(request.getContextPath() + "/faces/jsp/login.jsp"); // No logged-in user found, so redirect to login page.
} else {
chain.doFilter(req, res); // Logged-in user found, so just continue request.
}
}

@Override
public void destroy() {
// If you have assigned any expensive resources as field of
// this Filter class, then you could clean/close them here.
}

}

登录成功后设置 session 变量

FacesContext.getCurrentInstance().getExternalContext()
.getSessionMap()
.put(IConstants.HAS_USER_ID, IConstants.HAS_USER_ID);

但我面临的问题是我一直低于日志

Inside Login Filter
session...org.apache.catalina.session.StandardSessionFacade@1c134e1

在控制台和页面中永远不会重定向到下一页或登录页面。

最佳答案

这是因为您的过滤器也匹配登录页面上的请求。它基本上是在重定向到登录页面的无限循环中运行。基本上有两种选择:

  1. 确保登录 URL 未被过滤器映射覆盖。将受限制的页面放在 /secured/*/app/* 等文件夹中,并将过滤器精确映射到该 URL 模式上,并将登录页面放在外面。

  2. 如果当前未请求登录 URL,请检查过滤器。

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
    HttpServletRequest request = (HttpServletRequest) req;
    HttpServletResponse response = (HttpServletResponse) res;
    HttpSession session = request.getSession(false);
    boolean loggedIn = (session != null) ? session.getAttribute(IConstants.HAS_USER_ID) != null : false;
    String loginURL = request.getContextPath() + "/faces/jsp/login.jsp";

    if (!loggedIn && !request.getRequestURI().equals(loginURL)) {
    response.sendRedirect(loginURL);
    } else {
    chain.doFilter(request, response);
    }
    }

关于jsf - JSF 中的 Web 过滤器,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14355017/

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