<http use-expressions="true">
<intercept-url pattern="/secure/**" access="hasRole('supervisor')"/>
<intercept-url pattern="/**" access="isAuthenticated()" />
<form-login />
<logout logout-success-url="/loggedout.jsp" delete-cookies="JSESSIONID"/>
<remember-me />
</http>
<authentication-manager>
<authentication-provider>
<password-encoder ref="encoder"/>
<user-service>
<user name="administrator" password="07a130111f1f911148fc3fa252add84a89fefb39fa4559648a08543f1b79cfbd74dfa6a05e389fc5" authorities="supervisor, user, teller" />
<user name="operator" password="270bbd890ad86ad4847a49c3b0058ccc3c4c9cfee31446b3cf032c0d4d15354b36473c0f063c6ce7" authorities="user" />
</user-service>
</authentication-provider>
</authentication-manager>
上述看似独立的两段, 它们之间是如何协调工作的呢? 又是如何建立关系的呢?
这得从Spring Security 的配置解析说起, Spring Security 的遇到 <http> 标签时, 会去查看该标签的内容, 再根据标签内容建立一系列的 Filter, 组成 FilterChain, 这些Filter 有:
SecurityContextPersistenceFilter
SessionManagementFilter
RequestCacheFilter
SecurityContextHolderAwareRequestFilter
JaasApiIntegrationFilter
ChannelProcessingFilter
FilterSecurityInterceptor
其中 FilterSecurityInterceptor 需要注入AuthenticationManager, Spring Security的方案是看 <http> 标签中的authentication-manager-ref 属性,这个属性直接对应 标签 <authentication-manager> 生成的Bean, 使用这种方式则标签 <authcentication-manager> 需要声明Id号。 如果该属性什么值都没有, 则看一下上下文中有没有 Id 为 org.springframework.security.authenticationManager 的Bean, 这个Bean实际上就是由标签 <authentication-manager> 生成的(不带Id号)。
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