Spring Security授权 AccessDecisionManager

Spring Security授权 AccessDecisionManager

博客分类：

• Security
• Spring

 

在前面那篇博客有一段配置：

1. <http auto-config="false" disable-url-rewriting="true" use-expressions="true" entry-point-ref="dtAuth"
2. create-session="never">
3. <!-- <session-management session-authentication-strategy-ref="dtsession"/> -->
4. <intercept-url pattern="/unread/get" access="isAuthenticated()"/>
5. <intercept-url pattern="/authtest.xhtm" access="hasRole('working')"/>
6. <intercept-url pattern="/authtest1.xhtm" access="hasRole('trac')"/>
7. <intercept-url pattern="/cmmt/uc" access="isAuthenticated()"/>
8. <intercept-url pattern="/favicon.ico" access="denyAll"/>
9. <intercept-url pattern="/**" access="permitAll"/>
10. <custom-filter position="PRE_AUTH_FILTER" ref="dtSessionMgr"/>
11. </http>

pattern表示url,access表示url的权限，但这个isAuthenticated()具体在哪里执行呢？原来Spring提供授权机制，由org.springframework.security.access.AccessDecisionManager这个接口来实现。 

这个接口定义了这个方法：

1. void decide(Authentication authentication, Object object, Collection<ConfigAttribute> configAttributes)
2. throws AccessDeniedException, InsufficientAuthenticationException;

对应上面的配置：object就是url,configAttributes就是一个access。常用的实现类是AffirmativeBased