cas sso單點登錄系列6_cas單點登錄防止登出退出后刷新后退ticket失效報500錯

轉（http://blog.csdn.net/ae6623/article/details/9494601）

問題： 我登錄了client2，又登錄了client3，現在我把client2退出了，在client3里面我F5刷新了一下，結果頁面報錯：

未能夠識別出目標 'ST-41-2VcnVMguCDWJX5zHaaaD-cas01.example.org'票根

<span style="font-family:Microsoft YaHei;font-size:12px;">type Exception report

message org.jasig.cas.client.validation.TicketValidationException:

description The server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: org.jasig.cas.client.validation.TicketValidationException: 
        鏈兘澶熻瘑鍒嚭鐩爣 'ST-41-2VcnVMguCDWJX5zHaaaD-cas01.example.org'紲ㄦ牴
    
    org.jasig.cas.client.validation.AbstractTicketValidationFilter.doFilter(AbstractTicketValidationFilter.java:155)
    org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:99)
    org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
root cause

org.jasig.cas.client.validation.TicketValidationException: 
        鏈兘澶熻瘑鍒嚭鐩爣 'ST-41-2VcnVMguCDWJX5zHaaaD-cas01.example.org'紲ㄦ牴
    
    org.jasig.cas.client.validation.Cas20ServiceTicketValidator.parseResponseFromServer(Cas20ServiceTicketValidator.java:73)
    org.jasig.cas.client.validation.AbstractUrlBasedTicketValidator.validate(AbstractUrlBasedTicketValidator.java:188)
    org.jasig.cas.client.validation.AbstractTicketValidationFilter.doFilter(AbstractTicketValidationFilter.java:132)
    org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:99)
    org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.37 logs.</span>

 

猜都能猜出來，我注銷了，ticket已經失效了，現在我又發回到server端，它就報錯了。（客戶端發過去就報錯了），以下就是cas ticket失效處理的一個很簡單的解決辦法，復雜的話，需要修改client源碼進行異常處理。

 

1.所以針對這個情況，我只能在web.xml中下手了，（你也可以修改客戶端的jar包中的一些java類，自己去做這個異常處理，接收所有在cas使用過程中會出錯的處理，全部跳轉到錯誤頁面中，讓掉線的人重新登錄。在這里，我們采用web.xml配置一下）

 

2.這是官網解釋：https://wiki.jasig.org/display/CASC/Configuring+the+Jasig+CAS+Client+for+Java+in+the+web.xml 它的解釋：

 

The correct order of the filters in web.xml is necessary:

1. AuthenticationFilter
2. TicketValidationFilter (whichever one is chosen)
3. HttpServletRequestWrapperFilter
4. AssertionThreadLocalFilter

 

意思是說，過濾器鏈不要錯，我之前的那篇教程里cas客戶端配置web.xml沒有使用這幾個過濾器，現在我們重新使用它。

 

3.這是一個哥們之前解釋的：我貼出來。

單點登出，客戶端配置。我嘗試使用SAML作為認證和Ticket校驗，但是調試時發現單點登出取標識的方式只能識別CAS的認證和校驗。
認證：org.jasig.cas.client.authentication.AuthenticationFilter
校驗：org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter
過濾器順序：
1. CAS Single Sign Out Filter
2. CAS Validation Filter
3. CAS Authentication Filter
4. CAS HttpServletRequest Wrapper Filter
5. CAS Assertion Thread Local Filter
特別注意Validation在Authentication之前，因為我使用的是Cas20ProxyReceivingTicketValidationFilter。根據CAS文檔描述：If you are using proxy validation, you should map the validation filter before the authentication filter.

 

4.ok，放上我的web.xml文件，廢掉之前的cas驗證過濾器(CAS Filter)。使用另一個過濾器(CAS Authentication Filter)，並且增加另外三個過濾器（CAS Validation Filter,CAS HttpServletRequest Wrapper Filter,CAS Assertion Thread Local Filter），注意過濾器的順序.

<span style="font-family:Microsoft YaHei;font-size:12px;"><?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <!-- 解決中文亂碼問題 -->
    <filter>
        <filter-name>spring filter</filter-name>
        <filter-class>
            org.springframework.web.filter.CharacterEncodingFilter
        </filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>spring filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- 解決中文亂碼問題 -->


    <!--1.用於單點退出 -->
    <listener>
        <listener-class>
            org.jasig.cas.client.session.SingleSignOutHttpSessionListener
        </listener-class>
    </listener>

    <filter>
        <filter-name>CAS Single Sign Out Filter</filter-name>
        <filter-class>
            org.jasig.cas.client.session.SingleSignOutFilter
        </filter-class>
    </filter>

    <filter-mapping>
        <filter-name>CAS Single Sign Out Filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>



    <!--2.負責Ticket校驗-->
    <filter>
        <filter-name>CAS Validation Filter</filter-name>
        <filter-class>
            org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter
        </filter-class>
        <init-param>
            <param-name>casServerUrlPrefix</param-name>
            <param-value>
                http://192.168.168.141:8080/casServer
            </param-value>
        </init-param>
        <init-param>
            <param-name>serverName</param-name>
            <param-value>192.168.168.141:8080</param-value>
        </init-param>
        <init-param>
            <param-name>useSession</param-name>
            <param-value>true</param-value>
        </init-param>

        <init-param>
            <param-name>exceptionOnValidationFailure</param-name>
            <param-value>false</param-value>
        </init-param>

        <init-param>
            <param-name>redirectAfterValidation</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>

    <filter-mapping>
        <filter-name>CAS Validation Filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- 3. 單點登錄驗證 -->

    <filter>
        <filter-name>CAS Authentication Filter</filter-name>
        <filter-class>
            org.jasig.cas.client.authentication.AuthenticationFilter
        </filter-class>
        <init-param>
            <param-name>casServerLoginUrl</param-name>
            <param-value>
                http://192.168.168.141:8080/casServer/login
            </param-value>
        </init-param>
        <init-param>
            <param-name>serverName</param-name>
            <param-value>http://192.168.168.141:8080</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CAS Authentication Filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>



    <!-- 3.用於單點登錄 去服務器端認證(之前使用的這種)
            <filter>
            <filter-name>CAS Filter</filter-name>
            <filter-class>
            edu.yale.its.tp.cas.client.filter.CASFilter
            </filter-class>
            <init-param>
            <param-name>
            edu.yale.its.tp.cas.client.filter.loginUrl
            </param-name>
            <param-value>
            http://192.168.168.141:8080/casServer/login
            </param-value>
            </init-param>
            <init-param>
            <param-name>
            edu.yale.its.tp.cas.client.filter.validateUrl
            </param-name>
            <param-value>
            http://192.168.168.141:8080/casServer/serviceValidate
            </param-value>
            </init-param>
            <init-param>
            <param-name>
            edu.yale.its.tp.cas.client.filter.serverName
            </param-name>
            <param-value>192.168.168.141:8080</param-value>
            </init-param>
            </filter>
        -->


    <!--4.  CAS HttpServletRequest Wrapper Filter 這個是HttpServletRequet的包裹類，讓他支持getUserPrincipal，getRemoteUser方法來取得用戶信息-->

    <filter>
        <filter-name>CAS HttpServletRequest Wrapper Filter</filter-name>
        <filter-class>
            org.jasig.cas.client.util.HttpServletRequestWrapperFilter
        </filter-class>
    </filter>

    <filter-mapping>
        <filter-name>CAS HttpServletRequest Wrapper Filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>


    <!--5. CAS Assertion Thread Local Filter  這個類把Assertion信息放在ThreadLocal變量中，這樣應用程序不在web層也能夠獲取到當前登錄信息-->

    <filter>
        <filter-name>CAS Assertion Thread Local Filter</filter-name>
        <filter-class>
            org.jasig.cas.client.util.AssertionThreadLocalFilter
        </filter-class>
    </filter>

    <filter-mapping>
        <filter-name>CAS Assertion Thread Local Filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>


    <servlet>
        <servlet-name>Query</servlet-name>
        <servlet-class>servlet.Query</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>Query</servlet-name>
        <url-pattern>/query</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>
</span>

5.如果這樣做了，你還需要一件事情，就是前台獲取用戶信息的方式改了，我的index.jsp改成了這個：

<span style="font-family:Microsoft YaHei;font-size:12px;"><%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@page import="edu.yale.its.tp.cas.client.filter.CASFilter"%>
<%@page import="org.jasig.cas.client.util.AssertionThreadLocalFilter"%>
<%@page import="org.jasig.cas.client.util.HttpServletRequestWrapperFilter"%>
<%@page import="org.jasig.cas.client.authentication.AttributePrincipal"%>
<%@page import="org.jasig.cas.client.util.AbstractCasFilter"%>
<%@page import="org.jasig.cas.client.validation.Assertion"%>


<body>

        <h1>
            登錄成功，這是客戶端2
        </h1>
        <br />

        歡迎您:

        <%
            //String username = (String) session.getAttribute(CASFilter.CAS_FILTER_USER);
            //String username2 = (String)AssertionHolder.getAssertion().getPrincipal().getName();
            String username = "";
             AttributePrincipal principal = (AttributePrincipal) request.getUserPrincipal();
             if(principal != null){
               username = principal.getName();//獲取用戶名
             }
            
         
            
        %>
        用戶名：<%=username%></span>

ok,我的應用之間如果一個退出，另一個就算帶ticket參數也不不再報錯了，就算是測試組的兄弟拿到那段ticket復制粘貼到另一個瀏覽器中進行訪問，也不會報錯。

 

ps：

也有兄弟說可以通過修改C:\tomcat7\webapps\casServer\WEB-INF\spring-configuration\ticketExpirationPolicies.xml這個文件中的

  <!-- Expiration policies -->
    <util:constant id="SECONDS" static-field="java.util.concurrent.TimeUnit.SECONDS"/>
    <bean id="serviceTicketExpirationPolicy" class="org.jasig.cas.ticket.support.MultiTimeUseOrTimeoutExpirationPolicy"
          c:numberOfUses="1" c:timeToKill="${st.timeToKillInSeconds:10}" c:timeUnit-ref="SECONDS"/>

其中那個

 

 c:numberOfUses="1" //使用ticket多少次

 c:timeToKill="${st.timeToKillInSeconds:10}" //多少秒過期，默認10秒，你把這個改成10分鍾玩玩。

這個方法我沒有嘗試，所以希望想嘗試想折騰和想玩的兄弟狠狠的點擊這個鏈接：http://bbs.csdn.net/topics/390111112