ldap与Acegi? ----Acegi配置文件解剖

ldap与Acegi? ----Acegi配置文件解剖

这两个之间没什么必然的联系吧?ldap不熟悉,Acegi更是不熟悉.呵呵,这两个再搅和在一起就乱了.

ldap好像是与数据库连接相关的一个东东,那它与现在常见的数据库连接JDBC有什么区别?与JNDI呢?与这两个比又有什么优势?这个优势又怎么暗合了Acegi的需求?

对于Acegi只知道它是与Spring协作很好的一个Security框架,先不说Security别的方面,现在只看它如何管理登录这块,登录肯定是要访问数据库,那么在Acegi的配置文件中又是怎么来体现管理这个访问数据库的呢?

仔细研究项目中定义的applicationContext-acegi-secutiry.xml文件,这里面配置了如下的几个Bean:
 1,filterChainProxy -->org.acegisecurity.util.FilterChainProxy
    property: filterInvocationDefinitionSource,其值有:
        CONVERT_URL_TOLOWERCASE_BEFORE_COMPARISON
        PATTEN_TYPE_APCHE_ANT

        /**=httpSessionContextIntegrationFilter,        logoutFilter,authenicationProcessingFilter,securityContextHolderAwareRequestFilter,rememberMeProcessingFilter,anonymousProcessingFilter,exceptionTranslationFilter,filterInvocationInterceptor

        ?**
        这么一长串是参数是干啥的,filterInvocationDefinitionSource是个什么类型?
            看了一下它的源代码,其类型为:FilterInvocationDefinitionSource,那么这个类型怎么又会接收上面那么长的字符串?

            再看FilterInvocationDefinitionSource的源代码,它是个接口,这下更惨了,FilterChainProxy初始化调用set时怎么又会初始化一个接口?内部匿名类?

            先往下看.........
        ?
2,httpSessionContextIntegrationFilter -->org.acegisecurity.context.HttpSessionContextIntegrationFilter. 这个类没有属性可配.
3,logoutFilter -->org.acegisecurity.ui.logout.LogoutFilter
    通过<constuctor-arg>配置了value="/index.htm".
    又通过<constructor-arg>配置了 一个List其值为:
    
    <ref bean = "remeberMeServices">?????????????????????????????????
    
    和<bean class = "org.acegisecurity.ui.logout.SecurityContextLogoutHandler" />
4,authenicationProcessingFilter --> org.acegisecurity.ui.webapp.AuthenticationProcessingFilter
    六个property:
        authenticationManager ref authenticationManager ??????????????????????????
        authenticationFailureUrl value="/jsp/accessDenied.jsp"
        alwaysUseDefaultTargetUrl value = "true"
        defaultTargetUrl value="/pages/content.html"/
        filterProcessesUrl value="/jsp/j_acegi_security_check" ???????这个好像很关键的.
        rememberMeServices  ref="rememberMeServices" ???????????????????
5,securityContextHolderAwareRequestFilter -->　org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter　没任何属性可配．

6,rememberMeProcessingFilter --> org.acegisecurity.ui.rememberme.RememberMeProcessingFilter
    两个属性:
    authenticationManager ref="authenticationManager" ???????????????????
    rememberMeServices ref="rememberMeServices" ??????????????????

7,anonymousProcessingFilter --> org.acegisecurity.providers.anonymous.AnonymousProcessingFilter
    两个属性:
    key value="changeThis"
    userAttribute  value="anonymousUser,ROLE_ANONYMOUS"

8,exceptionTranslationFilter --> org.acegisecurity.ui.ExceptionTranslationFilter
    两个属性:
    <property name="authenticationEntryPoint">
            <bean class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilterEntryPoint">
                <property name="loginFormUrl" value="/jsp/login.jsp"/>
                <property name="forceHttps" value="false"/>
            </bean>
        </property>
        <property name="accessDeniedHandler">
            <bean class="org.acegisecurity.ui.AccessDeniedHandlerImpl">
                <property name="errorPage" value="/jsp/accessDenied.jsp"/>
            </bean>
        </property>

9,filterInvocationInterceptor --> org.acegisecurity.intercept.web.FilterSecurityInterceptor
    三个属性:
    authenticationManager ref="authenticationManager" ???????????????????????
    <property name="accessDecisionManager">
            <bean class="org.acegisecurity.vote.AffirmativeBased">
                <property name="allowIfAllAbstainDecisions" value="false"/>
                <property name="decisionVoters">
                    <list>
                        <bean class="org.acegisecurity.vote.RoleVoter"/>
                        <bean class="org.acegisecurity.vote.AuthenticatedVoter"/>
                    </list>
                </property>
            </bean>
        </property>
        <property name="objectDefinitionSource">
            <value>
                CONVERT_URL_TO_LOWERCASE_BEFORE_COMPARISON
                PATTERN_TYPE_APACHE_ANT
                /jsp/login.jsp=ROLE_ANONYMOUS
                /jsp/**=ROLE_MPIXTOOLGROUP
            </value>
        </property>

10, rememberMeServices --> org.acegisecurity.ui.rememberme.TokenBasedRememberMeServices
    两个属性:
    <property name="userDetailsService" ref="userDetailsService"/> ????????????
        <property name="key" value="changeThis"/>
11, authenticationManager --> org.acegisecurity.providers.ProviderManager
    一个属性:
    <property name="providers"> ????????难道说这可就是登录信息的验证来源?providers嘛.
            <list>
                <!-- To Disable LDAP, comment out ldapAuthProvider reference below -->
                <ref local="ldapAuthProvider"/>
                <ref local="daoAuthenticationProvider"/>
                <bean class="org.acegisecurity.providers.anonymous.AnonymousAuthenticationProvider">
                    <property name="key" value="changeThis"/>
                </bean>
                <bean class="org.acegisecurity.providers.rememberme.RememberMeAuthenticationProvider">
                    <property name="key" value="changeThis"/>
                </bean>
            </list>
        </property>
12, daoAuthenticationProvider --> org.acegisecurity.providers.dao.DaoAuthenticationProvider
    一个属性:
    <property name="userDetailsService" ref="userDetailsService"/>
13, userDetailsService --> org.acegisecurity.userdetails.memory.InMemoryDaoImpl
    一个属性:
    <property name="userMap">
            <value>
                jklaassen=4moreyears,ROLE_ADMIN
                test=test,ROLE_MPIXTOOLGROUP   ?????????????这是静态的验证,没有去数据库里查用户和密码吗?
                devteam=get2work,ROLE_MPIXTOOLGROUP
                jgaerlan=1234,ROLE_MPIXTOOLGROUP
                opts=opts,ROLE_OPERATIONS
            </value>
        </property>

    注意下面有一段配置被注释掉了: ??????????????这个是要到数据库里查找吧?
    <!--
            <bean id="userDetailsService" class="org.acegisecurity.userdetails.jdbc.JdbcDaoImpl">
            <property name="dataSource">
                <ref bean="dataSource"/>
            </property>
            <property name="usersByUsernameQuery">
                <value>{call dbo.MLab_User_GetInfoByUserName(?)}</value>
            </property>
            <property name="authoritiesByUsernameQuery">
                <value>{call dbo.MLab_UserRole_GetInfoByID(?)}</value>
            </property>
            </bean>
    -->
14, initialDirContextFactory --> org.acegisecurity.ldap.DefaultInitialDirContextFactory
    其配置如下:
    <constructor-arg value="ldap://dc03:389/OU=Employees,OU=Pleasanton,dc=kittyhawk,dc=funmail,dc=com"/>
        <property name="managerDn">
            <value>cn=mpixtool,OU=Employees,OU=Pleasanton,dc=kittyhawk,dc=funmail,dc=com</value>
        </property>
        <property name="managerPassword">
            <value>p@55w0rd</value> ??????????????????这个密码并没有用到呀,而是用test的
        </property>


15, userSearch --> org.acegisecurity.ldap.search.FilterBasedLdapUserSearch ?????????这个来负责登录用户的验证?
    <constructor-arg index="0">
            <value></value>
        </constructor-arg>
        <constructor-arg index="1">
            <value>sAMAccountName={0}</value>
        </constructor-arg>
        <constructor-arg index="2">
            <ref local="initialDirContextFactory"/>
        </constructor-arg>
        <property name="searchSubtree">
            <value>true</value>
        </property>
16,     ldapAuthProvider --> org.acegisecurity.providers.ldap.LdapAuthenticationProvider
    <constructor-arg>
            <bean class="org.acegisecurity.providers.ldap.authenticator.BindAuthenticator">
                <constructor-arg>
                    <ref local="initialDirContextFactory"/>
                </constructor-arg>
                <property name="userSearch">
                    <ref local="userSearch"/>
                </property>
            </bean>
        </constructor-arg>
        <constructor-arg>
            <bean class="org.acegisecurity.providers.ldap.populator.DefaultLdapAuthoritiesPopulator">
                <constructor-arg>
                    <ref local="initialDirContextFactory"/>
                </constructor-arg>
                <constructor-arg>
                    <value></value>
                </constructor-arg>
                <property name="groupRoleAttribute">
                    <value>cn</value>
                </property>
                <property name="rolePrefix">
                    <value>ROLE_</value>
                </property>
                <property name="convertToUpperCase">
                    <value>true</value>
                </property>
                <property name="defaultRole">
                    <value>IS_AUTHENTICATED_FULLY</value>
                </property>
            </bean>
        </constructor-arg>

一共配置了16个Bean,
    filterChainProxy引用的Bean有:
        --httpSessionContextIntegrationFilter,上面标号的第2个Bean.
        --logoutFilter,上面标号的第3个Bean.
            ----这个logoutFilter引用的有:
                ------ rememberMeServices(标号为10)
                    --------这个rememberMeServices引用的有:
                        ----------userDetailsService(标号为13)
        --authenicationProcessingFilter, 上面标号的第4个Bean.
            ----这个authenicationProcessingFilter引用的有:
                ------authenticationManager(标号为11)
                    --------这个authenticationManager引用的有:
                        ----------ldapAuthProvider(标号为16)
                            ------------这个IdapAuthProvider引用的有:
                                --------------initialDirContextFactory(标号为14)
                                --------------userSearch(标号为15)
                        ----------daoAuthenticationProvider(标号为12)
                            ------------这个authenticationManager引用的有:
                                --------------userDetailsService(标号为13)
                ------ rememberMeServices(标号为10)
        --securityContextHolderAwareRequestFilter, 上面标号的第5个Bean.
        --rememberMeProcessingFilter,上面标号的第6个Bean.
            ----这个rememberMeProcessingFilter引用的有:
                ------authenticationManager(标号为11)
                ------ rememberMeServices(标号为10)
        --anonymousProcessingFilter,上面标号的第7个Bean.
        --exceptionTranslationFilter,上面标号的第8个Bean.
        --filterInvocationInterceptor,上面标号的第9个Bean.
            ----这个filterInvocationInterceptor引用的有:
                ------authenticationManager(标号为11)

        止此整个Bean树解析完毕,16个Bean中除了filterChainProxy自己外的15个里它引用了8个,另外的7个又都间接地引用,filterChainProxy是带头大哥无疑了!