使用ACEGI实现权限控制

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环境：
struts2，acegi1.0.6，spring2.5.1,cas3

一、综述：环境搭建
1.spring和acegi版本
spring2.5.6和acegi1.0.6兼容性问题
会报
java.lang.NoClassDefFoundError: org/springframework/web/bind/RequestUtils
不过据说装合适的spring-webmvc这个jar也可以解决问题，没有测试

1.搭建acegi环境
web.xml配置，使用acegi的过滤器
配置web.xml

<context-param>中包含新配置文件
<!-- Acegi过滤器 -->
 <filter>
  <filter-name>acegiFilterChain</filter-name>
  <filter-class>org.acegisecurity.util.FilterToBeanProxy</filter-class>
  <init-param>
   <param-name>targetClass</param-name>
   <param-value>org.acegisecurity.util.FilterChainProxy</param-value>
  </init-param>
 </filter>

 <!-- Acegi过滤器URL映射 -->
 <filter-mapping>
  <filter-name>acegiFilterChain</filter-name>
  <url-pattern>/*</url-pattern>
 </filter-mapping>

过滤器要放在struts前面，否则会报错。因为有些操作要acegi中的springmvc处理

javax.servlet.ServletException: Filter execution threw an exception
 org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:389)
java.lang.NoClassDefFoundError: org/springframework/web/bind/RequestUtils

配置acegi配置文件，配置认证管理器、投票管理器、过滤器链、配置acegi的log4j日志

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

 <!--
  ========================================================================
  认证管理器
  =========================================================================
 -->
 <bean id="authenticationManager" class="org.acegisecurity.providers.ProviderManager">
  <property name="providers">
   <list>
    <ref bean="daoAuthenticationProvider" />
    <ref bean="rememberMeAuthenticationProvider" />
   </list>
  </property>
 </bean>

 <bean id="daoAuthenticationProvider"
  class="org.acegisecurity.providers.dao.DaoAuthenticationProvider">
  <property name="userDetailsService" ref="userDetailsService" />
  <property name="userCache" ref="userCache" />
 </bean>

 <!-- 基于DAO验证的Ehcache实现 -->
 <bean id="userCache"
  class="org.acegisecurity.providers.dao.cache.EhCacheBasedUserCache">
  <property name="cache" ref="userCacheBackend" />
 </bean>
 <bean id="userCacheBackend" class="org.springframework.cache.ehcache.EhCacheFactoryBean">
  <property name="cacheManager" ref="cacheManager" />
  <property name="cacheName">
   <value>userCache</value>
  </property>
 </bean>
 <bean id="cacheManager"
  class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean" />

 <bean id="rememberMeAuthenticationProvider"
  class="org.acegisecurity.providers.rememberme.RememberMeAuthenticationProvider">
  <property name="key" value="remember_Me" />
 </bean>

 <!-- 使用数据库DAO查找用户和角色 -->
 <bean id="userDetailsService" class="org.acegisecurity.userdetails.jdbc.JdbcDaoImpl">
  <property name="dataSource" ref="dataSource" />
  <property name="usersByUsernameQuery">
   <value> 
          <![CDATA[SELECT u.staffname USERNAME,u.staffpwd PASSWORD,u.STATUS enabled FROM sw_staff u where u.STATUS = 1 AND u.staffname = ?]]>
   </value>
  </property>
  <property name="authoritiesByUsernameQuery">
   <value> 
          <![CDATA[SELECT t1.staffid USERNAME,t3.roledec authority FROM sw_staff t1, SW_UserPower t2,sw_Roles t3 WHERE t1.staffid= t2.staffid and t2.roleid= t3.roleid and t1.staffname = ?]]>
   </value>
  </property>
 </bean>

 <!--
  ========================================================================
  决策管理器
  =========================================================================
 -->
 <!-- 至少有一个投票者容许，就可以访问资源 -->
 <bean id="accessDecisionManager" class="org.acegisecurity.vote.AffirmativeBased">
  <property name="decisionVoters">
   <list>
    <bean class="org.acegisecurity.vote.RoleVoter" />
   </list>
  </property>
  <!-- 所有投票者弃权，不容许访问 -->
  <property name="allowIfAllAbstainDecisions" value="false" />
 </bean>

 <!--
  ========================================================================
  过滤器链
  =========================================================================
 -->

 <bean id="filterChainProxy" class="org.acegisecurity.util.FilterChainProxy">
  <property name="filterInvocationDefinitionSource">
   <value>
    CONVERT_URL_TO_LOWERCASE_BEFORE_COMPARISON
    PATTERN_TYPE_APACHE_ANT
    /**=httpSessionContextIntegrationFilter,logoutFilter,authenticationProcessingFilter,rememberMeFilter,exceptionFilter
   </value>
  </property>
 </bean>

 <!-- 从Session中获得用户信息并放入SecurityContextHolder -->
 <bean id="httpSessionContextIntegrationFilter"
  class="org.acegisecurity.context.HttpSessionContextIntegrationFilter" />

 <!-- 用户注销 -->
 <bean id="logoutFilter" class="org.acegisecurity.ui.logout.LogoutFilter">
  <!-- 注销后默认的跳转页面 -->
  <constructor-arg value="/helloWorld.jsp" />
  <constructor-arg>
   <list>
    <ref bean="rememberMeServices" />
    <bean class="org.acegisecurity.ui.logout.SecurityContextLogoutHandler" />
   </list>
  </constructor-arg>
  <property name="filterProcessesUrl" value="/j_logout.do" />
 </bean>

 <!-- 表单方式验证用户身份 -->
 <bean id="authenticationProcessingFilter"
  class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilter">
  <property name="authenticationManager" ref="authenticationManager" />
  <!-- 登录失败的页面,包含出错信息的登录页面 -->
  <property name="authenticationFailureUrl" value="/login.jsp?login_error=Login%20failed." />
  <!-- 登录后的跳转页面 -->
  <property name="defaultTargetUrl" value="/helloWorld.jsp" />
  <!-- 用户登录的URL -->
  <property name="filterProcessesUrl" value="/j_acegi_security_check" />
  <property name="rememberMeServices" ref="rememberMeServices" />
 </bean>

 <bean id="casProcessingFilter" class="org.acegisecurity.ui.cas.CasProcessingFilter">
  <property name="authenticationManager" ref="authenticationManager" />
  <!-- 登录后的跳转页面 -->
  <property name="defaultTargetUrl" value="/helloWorld.jsp" />
  <property name="filterProcessesUrl" value="/j_acegi_cas_security_check" />
  <!-- 认证失败后的跳转页面 -->
  <property name="authenticationFailureUrl" value="/login.jsp?login_error=Login%20failed." />
  <property name="rememberMeServices" ref="rememberMeServices"/>
 </bean>

 <!-- 记住用户登录信息 -->
 <!--<bean id="rememberMeFilter"
  class="org.acegisecurity.ui.rememberme.RememberMeProcessingFilter">
  <property name="authenticationManager" ref="authenticationManager" />
  <property name="rememberMeServices" ref="rememberMeServices" />
 </bean>
-->

 <!-- 处理登录异常或权限异常的Filter -->
 <bean id="exceptionFilter" class="org.acegisecurity.ui.ExceptionTranslationFilter">
  <!-- 出现AuthenticationException时的登录入口,无认证异常 -->
  <!--
   表单登录时用 <property name="authenticationEntryPoint"> <bean
   class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilterEntryPoint">
   将用户导向登录页面 <property name="loginFormUrl" value="/login.jsp" />
   是否强制使用https <property name="forceHttps" value="false" /> </bean>
   </property>
  -->
  <!--CAS认证登录时用-->
  <property name="authenticationEntryPoint">
   <bean class="org.acegisecurity.ui.cas.CasProcessingFilterEntryPoint">
    <property name="loginUrl"
     value="https://localhost:8443/cas-server-webapp-3.1.1/login" />
    <property name="serviceProperties" ref="serviceProperties" />
   </bean>
  </property>
  <!-- 出现AccessDeniedException时的Handler，无权限异常-->
  <property name="accessDeniedHandler">
   <bean class="org.acegisecurity.ui.AccessDeniedHandlerImpl">
    <property name="errorPage" value="/accessDenied.jsp" />
   </bean>
  </property>
 </bean>

 <bean id="serviceProperties" class="org.acegisecurity.ui.cas.ServiceProperties">
  <!-- CAS登录后的重定向页面-->
  <property name="service" value="http://localhost:8080/test" />
  <property name="sendRenew" value="false" />
 </bean>

 <bean id="securityInterceptor"
  class="org.acegisecurity.intercept.web.FilterSecurityInterceptor">
  <property name="authenticationManager" ref="authenticationManager" />
  <property name="accessDecisionManager" ref="accessDecisionManager" />
  <property name="objectDefinitionSource">
   <value>
    CONVERT_URL_TO_LOWERCASE_BEFORE_COMPARISON
    PATTERN_TYPE_APACHE_ANT
    /index.jsp=ROLE_LOGIN
    /*action=ROLE_LOGIN
   </value>
  </property>
 </bean>

说明：
1、过滤器链：filterChainProxy，有顺序要求
/**=httpSessionContextIntegrationFilter,logoutFilter,authenticationProcessingFilter,rememberMeFilter,exceptionFilter,securityInterceptor

2、rememberMe配置要点
rememberMeServices使用TokenBasedRememberMeServices，token64编码后放入cookie
logoutFilter使用rememberMeServices，离开后保存cookie

rememberMeFilter配置authenticationManager和rememberMeServices
rememberMeServices的parameter和html表单的Remember Me字段的name一致
rememberMeServices的key和authenticationManager中的rememberMeAuthenticationProvider的key要一致

3、使用DaoAuthenticationProvide实现基于数据库的用户认证授权，userDetailsService中可以用注入sql使用数据库实现，文件方式保存用户基本没啥用
修改usersByUsernameQuery和authoritiesByUsernameQuery注入sql
使用Ehache提高性能

4、配置日志
<!-- 监听认证授权事件，输出日志 -->
<bean id="authenticationLoggerListener"
class="org.acegisecurity.event.authentication.LoggerListener" />

<bean id="authorizationLoggerListener"
class="org.acegisecurity.event.authorization.LoggerListener" />

对应的，如果是log4j.xml
log4j.xml
<logger name="log4j.logger.org.acegisecurity" additivity="true">
<level value="DEBUG" />
<appender-ref ref="LOG.DEBUG" />
</logger>
如果是log4j.properties
log4j.properties
log4j.logger.org.acegisecurity=DEBUG


5.表单认证
<bean id="authenticationProcessingFilter"
class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilter">
<property name="authenticationManager" ref="authenticationManager" />
<!-- 登录失败的页面,包含出错信息的登录页面 -->
<property name="authenticationFailureUrl" value="/login.jsp?login_error=Login%20failed." />
<!-- 登录后的跳转页面 -->
<property name="defaultTargetUrl" value="/helloWorld.jsp" />
<!-- 用户登录的URL -->
<property name="filterProcessesUrl" value="/j_login.do" />
<property name="rememberMeServices" ref="rememberMeServices" />
</bean>
表单中的username和password的name这里为j_username和j_password，acegi的springmvc实现中用
filterProcessesUrl默认是j_acegi_security_check，可以修改，需要登录页面同步

6.用户注销
logoutFilter中filterProcessesUrl默认是j_acegi_logout，只要将退出页面中url设置为j_acegi_logout就可以触发


7.授权
accessDecisionManager:事前评估。使用投票表决器。RoleVoter是基于角色的投票表决器。
这里securityInterceptor使用文件配置，也可以修改为数据库方式实现

8.使用aop对方法授权