并发控制是否可重写

Question

我的应用程序中有security.xml security.xml

<session-management session-authentication-error-url="/genesis"> 
        <concurrency-control max-sessions="1" error-if-maximum-exceeded="true" expired-url="/genesis?sessionExpired=true"/> 
    </session-management>

这将用户限制为单个会话。然而，我现在有一个要求，一个帐户必须允许多个会话，同时仍然限制所有其他帐户的单一会话。

对于如何实现这一点，有什么建议吗？

Answer 1

覆盖默认并发筛选器。跳过对特殊用户的处理：

public class CustomConcurrentSessionFilter extends ConcurrentSessionFilter {

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException,
        ServletException {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        if (!auth.getName().equals("bob")) {
            super.doFilter(req, res, chain);
        }
    }

}

在conf中将默认过滤器替换为自定义过滤器：

<security:http ... >
    <security:custom-filter position="CONCURRENT_SESSION_FILTER" ref="customConcurrentSessionFilter"/>
</security:http>

<bean id="customConcurrentSessionFilter" class="com.domain.CustomConcurrentSessionFilter"/>

Answer 2

(我在这里展开我的评论，为这个问题提供更完整的解决方案。)

只需在XML子类(下面我使用com.example.CustomConcurrentSessionFilter)和XML add中覆盖getMaximumSessionsForThisUser()：

• SessionAuthenticationStrategy bean ( id为"sas")，
• <bean:property name="sessionAuthenticationStrategy" ref="sas" /> in UsernamePasswordAuthenticationFilter

，<http>中的

• <session-management session-authentication-strategy-ref="sas" />，

• <bean:property name="sessionAuthenticationStrategy" ref="sas" />到您的UsernamePasswordAuthenticationFilter

完整的设置应类似于所示的here in docs

<http>
  <custom-filter position="CONCURRENT_SESSION_FILTER" ref="concurrencyFilter" />
  <custom-filter position="FORM_LOGIN_FILTER" ref="myAuthFilter" />

  <session-management session-authentication-error-url="/genesis"
      session-authentication-strategy-ref="sas"/>
</http>

<beans:bean id="concurrencyFilter"
   class="com.example.CustomConcurrentSessionFilter">
  <beans:property name="sessionRegistry" ref="sessionRegistry" />
  <beans:property name="expiredUrl" value="/genesis?sessionExpired=true" />
</beans:bean>

<beans:bean id="myAuthFilter"
    class="o.s.s.web.authentication.UsernamePasswordAuthenticationFilter">
  <beans:property name="sessionAuthenticationStrategy" ref="sas" />
  <beans:property name="authenticationManager" ref="authenticationManager" />
</beans:bean>

<beans:bean id="sas"
    class="o.s.s.web.authentication.session.ConcurrentSessionControlStrategy">
  <beans:constructor-arg name="sessionRegistry" ref="sessionRegistry" />
  <beans:property name="exceptionIfMaximumExceeded" value="true" />
  <beans:property name="maximumSessions" value="1" />
</beans:bean>

<beans:bean id="sessionRegistry"
    class="o.s.s.core.session.SessionRegistryImpl" />