单点登录CAS系列8-客户端配置单点登出

原理

本文内容包括配置单点登出、登出后自动跳转指定资源、CASServer禁用单点登出等

与单点登录相对应：登录的地址是/login，登出的地址是/logout，这里需要配置下面两个Filter

SingleSignOutFilter：用来使Session失效（要配置casServerUrlPrefix参数）

SingleSignOutHttpSessionListener：用于在Session过期时移除其对应的映射关系

• 登出后自动跳转指定资源

登出后默认会跳转到CASServer的登出页，若想跳转到其它资源，可在/logout的URL后面加上service=jumpurl

比如http://sso.jadyer.com:8080/cas-server-web/logout?service=https://jadyer.github.io/

但默认servcie跳转不会生效，需要CASServer配置//WEB-INF//cas.properties中的cas.logout.followServiceRedirects=true

另外为org.jasig.cas.client.session.SingleSignOutFilter增加service参数是没用的，因为登出后跳转到指定资源属于服务端行为

• 禁用单点登出

设置//CASServer//WEB-INF//cas.properties中的slo.callbacks.disabled=true

测试时点击登出后虽然页面跳转到了默认登出页，但再次访问CASClient资源发现并没有登出，即单点登出禁用成功

• 测试单点登出

测试时先登出，然后在浏览器新标签页访问CASClient资源，发现会被自动重定向到单点登录页

或登出后，再点浏览器后退按钮，发现会后退到之前的资源页，但在这个页面点击任何请求，都会自动重定向到单点登录页

代码

下面是客户端的web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" 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_2_5.xsd">    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath:applicationContext.xml</param-value>    </context-param>    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <servlet>        <servlet-name>SpringMVC</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>classpath:applicationContext.xml</param-value>        </init-param>    </servlet>    <servlet-mapping>        <servlet-name>SpringMVC</servlet-name>        <url-pattern>/</url-pattern>    </servlet-mapping>    <filter>        <filter-name>CharacterEncodingFilter</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>        <init-param>            <param-name>forceEncoding</param-name>            <param-value>true</param-value>        </init-param>    </filter>    <filter-mapping>        <filter-name>CharacterEncodingFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <!-- SSO -->    <listener>        <listener-class>org.jasig.cas.client.session.SingleSignOutHttpSessionListener</listener-class>    </listener>    <filter>        <filter-name>casSingleSignOutFilter</filter-name>        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>    </filter>    <filter-mapping>        <filter-name>casSingleSignOutFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <filter>        <filter-name>casAuthenticationFilter</filter-name>        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>    </filter>    <filter-mapping>        <filter-name>casAuthenticationFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <filter>        <filter-name>casTicketValidationFilter</filter-name>        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>    </filter>    <filter-mapping>        <filter-name>casTicketValidationFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <filter>        <filter-name>casHttpServletRequestWrapperFilter</filter-name>        <filter-class>org.jasig.cas.client.util.HttpServletRequestWrapperFilter</filter-class>    </filter>    <filter-mapping>        <filter-name>casHttpServletRequestWrapperFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <filter>        <filter-name>casAssertionThreadLocalFilter</filter-name>        <filter-class>org.jasig.cas.client.util.AssertionThreadLocalFilter</filter-class>    </filter>    <filter-mapping>        <filter-name>casAssertionThreadLocalFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping></web-app>

下面是客户端的/src/applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE"/>        <property name="ignoreResourceNotFound" value="false"/>        <property name="locations">            <list>                <value>classpath:config.properties</value>            </list>        </property>    </bean>    <mvc:resources mapping="/index.jsp" location="/index.jsp"/>    <!-- cas -->    <bean name="casSingleSignOutFilter" class="org.jasig.cas.client.session.SingleSignOutFilter">        <property name="casServerUrlPrefix" value="${casServerUrlPrefix}"/>    </bean>    <bean name="casAuthenticationFilter" class="org.jasig.cas.client.authentication.AuthenticationFilter">        <property name="serverName" value="${casClientServerName}"/>        <property name="casServerLoginUrl" value="${casServerLoginUrl}"/>    </bean>    <bean name="casTicketValidationFilter" class="org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter">        <property name="serverName" value="${casClientServerName}"/>        <property name="ticketValidator">            <bean class="org.jasig.cas.client.validation.Cas20ServiceTicketValidator">                <constructor-arg index="0" value="${casServerUrlPrefix}"/>            </bean>        </property>    </bean></beans>

下面是/src/config.properties

#<<Central Authentication Service>>#where to logoutcasServerLogoutUrl=http://sso.jadyer.com:8080/cas-server-web/logout#where to logincasServerLoginUrl=http://sso.jadyer.com:8080/cas-server-web/login#login server rootcasServerUrlPrefix=http://sso.jadyer.com:8080/cas-server-web#who am icasClientServerName=http://boss.jadyer.com:8080

下面是/WebRoot/index.jsp

<%@ page pageEncoding="UTF-8"%><%@ page import="java.util.Map"%><%@ page import="java.net.URLDecoder"%><%@ page import="com.jadyer.util.ConfigUtil"%><%@ page import="org.jasig.cas.client.util.AssertionHolder"%><%@ page import="org.jasig.cas.client.authentication.AttributePrincipal"%><script>function ssoLogout(){    if(confirm('确定要退出系统吗？')){        //top.location.href ='http://sso.jadyer.com:8080/cas-server-web/logout?service=https://jadyer.github.io/';        //top.location.href ='http://sso.jadyer.com:8080/cas-server-web/logout?service=http://sso.jadyer.com:8080/cas-server-web/login';        top.location.href ='<%=ConfigUtil.INSTANCE.getProperty("casServerLogoutUrl")%>';    }}</script><body style="background-color:#CBE0C9;">    <span style="color:red; font-size:32px; font-weight:bold;">客户端登录成功</span>    <br>    <br>    <a href="javascript:ssoLogout();">我要登出</a></body><hr size="2"><%    AttributePrincipal principal = (AttributePrincipal)request.getUserPrincipal();    Map<String, Object> attributes = principal.getAttributes();    out.print("principal.getName()=" + principal.getName() + "<br/>");    out.print("request.getRemoteUser()=" + request.getRemoteUser() + "<br/>");    out.print("登录用户：" + attributes.get("userId") + "<br/>");    out.print("登录时间：" + AssertionHolder.getAssertion().getAuthenticationDate() + "<br/>");    out.print("-----------------------------------------------------------------------<br/>");    for(Map.Entry<String, Object> entry : attributes.entrySet()){        //服务端返回中文时需要encode，客户端接收显示中文时需要decode，否则会乱码        out.print(entry.getKey() + "=" + URLDecoder.decode(entry.getValue().toString(), "UTF-8") + "<br/>");    }    out.print("-----------------------------------------------------------------------<br/>");    Map<String, Object> attributes22 = AssertionHolder.getAssertion().getAttributes();    for(Map.Entry<String, Object> entry : attributes22.entrySet()){        out.print(entry.getKey() + "=" + entry.getValue() + "<br/>");    }    out.print("-----------------------------------------------------------------------<br/>");    Map<String, Object> attributes33 = AssertionHolder.getAssertion().getPrincipal().getAttributes();    for(Map.Entry<String, Object> entry : attributes33.entrySet()){        out.print(entry.getKey() + "=" + entry.getValue() + "<br/>");    }%>

最后是读取配置文件的工具类ConfigUtil.java

package com.jadyer.util;import java.io.IOException;import java.util.Properties;import java.util.regex.Pattern;/** * 配置文件读取工具类 * -------------------------------------------------------------------------------------------------------------------- * 用法为ConfigUtil.INSTANCE.getProperty("KJJF.databaseURL") * 采用枚举的方式，也是Effective Java作者Josh Bloch提倡的方式，它不仅能避免多线程同步问题，而且还能防止反序列化重新创建新的对象 * -------------------------------------------------------------------------------------------------------------------- * @version v2.1 * @history v2.1-->增加<code>getPropertyBySysKey()</code>方法,用于获取配置文件的键值中含系统属性时的值,详见该方法注释 * @history v2.0-->采用枚举的方式实现单例 * @history v1.0-->通过内部类实现单例 * Created by 玄玉<https://jadyer.github.io/> on 2012/06/07 17:30. */public enum ConfigUtil {    INSTANCE;    private Properties config;    private ConfigUtil(){        config = new Properties();        try {            config.load(ConfigUtil.class.getResourceAsStream("/config.properties"));            System.out.println("Load /config.properties SUCCESS...");        } catch (IOException e) {            System.out.println("Load /config.properties Error...");            e.printStackTrace();            throw new ExceptionInInitializerError("加载系统配置文件失败...");        }    }    public String getProperty(String key){        return config.getProperty(key);    }    public int getPropertyForInt(String key){        return Integer.parseInt(config.getProperty(key));    }    /**     * 配置文件的键值中含系统属性时的获取方式     * -------------------------------------------------------------------------     * 若配置文件的某个键值含类似于${user.dir}的写法，如log=${user.dir}/app.log     * 则可以通过该方法使用系统属性中user.dir的值，替换掉配置文件键值中的${user.dir}     * -------------------------------------------------------------------------     * Created by 玄玉<https://jadyer.github.io/> on 2015/02/02 17:22.     */    public String getPropertyBySysKey(String key){        String value = config.getProperty(key);        if(null!=value && Pattern.compile("\\$\\{\\w+(\\.\\w+)*\\}").matcher(value).find()){            String sysKey = value.substring(value.indexOf("${")+2, value.indexOf("}"));            value = value.replace("${"+sysKey+"}", System.getProperty(sysKey));        }        return value;    }}