我的servlet映射破坏了我的过滤器

时间:2014-08-29 07:12:32

标签: java servlets filter mapping

在我的程序中,任何形式为/Controller/*的url都会被我的servlet映射到Controller类重定向。

我尝试添加过滤器以进行身份​​验证,如果用户未登录且路径不是/Controller/RegForm,则会重定向到/Controller/RegForm

问题是因为我的servlet映射重定向到/Controller,过滤器总是以/Controller为路径。

如何同时使用过滤器和servlet映射?

这是我的web.xml

<filter>
    <filter-name>AuthFilter</filter-name>
    <filter-class>AuthFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>AuthFilter</filter-name>
    <url-pattern>/Controller/*</url-pattern>
</filter-mapping> 
 <servlet>
    <servlet-name>Controller</servlet-name>
    <servlet-class>Controller</servlet-class>
</servlet>

<servlet-mapping>
    <servlet-name>Controller</servlet-name>
    <url-pattern>/Controller/*</url-pattern>
</servlet-mapping>

<session-config>
    <session-timeout>
        30
    </session-timeout>
</session-config>

我的过滤器:

@WebFilter("/Controller/*")
public class AuthFilter 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 {
    HttpServletRequest request = (HttpServletRequest) req;
    HttpServletResponse response = (HttpServletResponse) res;
    HttpSession session = request.getSession(false);
    String path = ((HttpServletRequest) request).getServletPath();

    if ((session != null && session.getAttribute("student") != null )||(excludeFromFilter(path))) {
            chain.doFilter(req, res); // Log 
        }
     else {
        response.sendRedirect("/registration-war/Controller/RegForm"); // No logged-in user found, so redirect to login page.
    }
}

private boolean excludeFromFilter(String path) {
    if (path.equals("/Controller/RegForm")) {
        return true; // add more page to exclude here
    } else {
        return false;
    }
}

1 个答案:

答案 0 :(得分:1)

使用HttpServletRequest.getServletPath()返回servlet URL(根据你的servlet映射)"/Controller"

您希望path info而不是servlet路径:

  

返回与客户端发出此请求时发送的URL关联的任何额外路径信息。额外的路径信息在servlet路径之后,但在查询字符串之前,将以&#34; /&#34;开头。字符。

例如,如果您的用户请求"/RegForm"页面,则会返回/Controller/RegForm

String pathInfo = HttpServletRequest.getPathInfo();