java过滤器给Cookie加上HttpOnly属性（亲测可以）

描述：

1.会话cookie中缺少HttpOnly属性会导致攻击者可以通过程序(JS脚本、Applet等)获取到用户的cookie信息，造成用户cookie信息泄露，增加攻击者的跨站脚本攻击威胁。

2.HttpOnly是微软对cookie做的扩展，该值指定cookie是否可通过客户端脚本访问。Microsoft Internet Explorer 版本 6 Service Pack 1 和更高版本支持cookie属性HttpOnly。

3.如果在Cookie中没有设置HttpOnly属性为true，可能导致Cookie被窃取。窃取的Cookie可以包含标识站点用户的敏感信息，如ASP.NET会话ID或Forms身份验证票证，攻击者可以重播窃取的Cookie，以便伪装成用户或获取敏感信息，进行跨站脚本攻击等。

4.如果在Cookie中设置HttpOnly属性为true，兼容浏览器接收到HttpOnly cookie，那么客户端通过程序(JS脚本、Applet等)将无法读取到Cookie信息，这将有助于缓解跨站点脚本威胁。

解决方案：
方案一：

CookieHttpOnlyFilter.java

package org._common.filter;
 
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
 
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.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * 解决检测到会话cookie中缺少HttpOnly属性的问题
 * @author kf0101
 *
 */
public class CookieHttpOnlyFilter implements Filter {
 
 public void destroy() {
 
 }
 
 public void doFilter(ServletRequest request, ServletResponse response,
   FilterChain filterChain) throws IOException, ServletException {
  // TODO Auto-generated method stub
        HttpServletRequest req = (HttpServletRequest) request; 
        HttpServletResponse resp = (HttpServletResponse) response;
  Cookie[] cookies = req.getCookies();
   if(cookies!=null){
    for(Cookie cookie : cookies){
     String value = cookie.getValue(); 
              StringBuilder builder = new StringBuilder(); 
              builder.append("JSESSIONID=" + value + "; "); 
              builder.append("Secure; "); 
              builder.append("HttpOnly; "); 
              Calendar cal = Calendar.getInstance(); 
              cal.add(Calendar.HOUR, 1); 
              Date date = cal.getTime(); 
              Locale locale = Locale.CHINA; 
              SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss",locale); 
              builder.append("Expires=" + sdf.format(date)); 
              resp.setHeader("Set-Cookie", builder.toString());
    }
    filterChain.doFilter(request, response);
   }
 }
 
 public void init(FilterConfig arg0) throws ServletException {
  // TODO Auto-generated method stub
 
 }
}

web.xml：

<filter> 
        <filter-name>cookieHttpOnlyFilter</filter-name> 
        <filter-class>org._common.filter.CookieHttpOnlyFilter</filter-class>  
  </filter> 
<filter-mapping> 
        <filter-name>cookieHttpOnlyFilter</filter-name> 
        <url-pattern>/*</url-pattern>  
  </filter-mapping>

验证方式：查看浏览器设置（HttpOnly） Set-Cookie: HttpOnly

打开网页，f12，刷新网页，如图：

方案二：
对secure-http-only属性的支持仅在http-servlet规范3上可用.检查web.xml中的version属性是否为“3.0”.

<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
            http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
     version="3.0">

在项目的web.xml文件中设置属性,如下所示：

    <session-config>
        <session-timeout>30</session-timeout>
        <cookie-config>
                <http-only>true</http-only>
                <secure>true</secure>
        </cookie-config>
    </session-config>