Shiro 注释不适用于 JavaEE6 项目

Question

问题：JavaEE6 的实现在哪里？

我目前正在处理一个 JavaEE6 项目，我发现即使我已经根据文档配置了 web.xml 和 shiro.ini，Shiro 的注释也不能开箱即用。

这就是我所拥有的：

1.) 一个页面：

<h:form>
  <h:commandLink action="#{userBean.action1()}" value="Action 1"></h:commandLink>
</h:form>

2.) 支持 bean：

@Stateless
@Named
public class UserBean {
    @Inject
    private Logger log;

    @RequiresAuthentication
    public void action1() {
        log.debug("action.1");
    }
}

3.) web.xml

<listener>
    <listener-class>org.apache.shiro.web.env.EnvironmentLoaderListener</listener-class>
</listener>

<filter>
    <filter-name>ShiroFilter</filter-name>
    <filter-class>org.apache.shiro.web.servlet.ShiroFilter</filter-class>
</filter>

<filter-mapping>
    <filter-name>ShiroFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

4.) shiro.ini

[main]
# listener = org.apache.shiro.config.event.LoggingBeanListener

shiro.loginUrl = /login.xhtml

[users]
# format: username = password, role1, role2, ..., roleN
root = secret,admin
guest = guest,guest
presidentskroob = 12345,president
darkhelmet = ludicrousspeed,darklord,schwartz
lonestarr = vespa,goodguy,schwartz

[roles]
# format: roleName = permission1, permission2, ..., permissionN
admin = *
schwartz = lightsaber:*
goodguy = winnebago:drive:eagle5

[urls]
# The /login.jsp is not restricted to authenticated users (otherwise no one could log in!), but
# the 'authc' filter must still be specified for it so it can process that url's
# login submissions. It is 'smart' enough to allow those requests through as specified by the
# shiro.loginUrl above.
/login.xhtml = authc
/logout = logout
/account/** = authc
/remoting/** = authc, roles[b2bClient], perms["remote:invoke:lan,wan"]

但是当我单击按钮时，它仍然执行操作。它应该抛出未经授权的异常吗？其他 shiro 注释也是如此。

请注意，如果我手动执行检查，它会起作用：

public void action1() {
    Subject currentUser = SecurityUtils.getSubject();
    AuthenticationToken token = new UsernamePasswordToken("guest", "guest");
    currentUser.login(token);

    log.debug("user." + currentUser);
    if (currentUser.isAuthenticated()) {
        log.debug("action.1");
    } else {
        log.debug("not authenticated");
    }
}

谢谢，
嫖娼

Answer 1

您基本上需要Java EE interceptor 来扫描调用的 CDI 和 EJB 方法上的注释。

首先创建一个拦截器必须拦截的注解：

@Inherited
@InterceptorBinding
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
public @interface ShiroSecured {
    //
}

然后自己创建拦截器：

@Interceptor
@ShiroSecured
public class ShiroSecuredInterceptor implements Serializable {

    private static final long serialVersionUID = 1L;

    @AroundInvoke
    public Object interceptShiroSecurity(InvocationContext context) throws Exception {
        Class<?> c = context.getTarget().getClass();
        Method m = context.getMethod();
        Subject subject = SecurityUtils.getSubject();

        if (!subject.isAuthenticated() && hasAnnotation(c, m, RequiresAuthentication.class)) {
            throw new UnauthenticatedException("Authentication required");
        }

        if (subject.getPrincipal() != null && hasAnnotation(c, m, RequiresGuest.class)) {
            throw new UnauthenticatedException("Guest required");
        }

        if (subject.getPrincipal() == null && hasAnnotation(c, m, RequiresUser.class)) {
            throw new UnauthenticatedException("User required");
        }

        RequiresRoles roles = getAnnotation(c, m, RequiresRoles.class);

        if (roles != null) {
            subject.checkRoles(Arrays.asList(roles.value()));
        }

        RequiresPermissions permissions = getAnnotation(c, m, RequiresPermissions.class);

        if (permissions != null) {
             subject.checkPermissions(permissions.value());
        }

        return context.proceed();
    }

    private static boolean hasAnnotation(Class<?> c, Method m, Class<? extends Annotation> a) {
        return m.isAnnotationPresent(a)
            || c.isAnnotationPresent(a)
            || c.getSuperclass().isAnnotationPresent(a);
    }

    private static <A extends Annotation> A getAnnotation(Class<?> c, Method m, Class<A> a) {
        return m.isAnnotationPresent(a) ? m.getAnnotation(a)
            : c.isAnnotationPresent(a) ? c.getAnnotation(a)
            : c.getSuperclass().getAnnotation(a);
    }

}

请注意，在目标类的超类上检查注释，并且目标类可能在 CDI 实际上是代理且 Shiro 的注释没有设置 @Inherited 的情况下。

为了让它在 CDI 托管 bean 上工作，首先在/WEB-INF/beans.xml 中注册拦截器，如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<beans
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://docs.jboss.org/cdi/beans_1_0.xsd"
>
    <interceptors>
        <class>com.example.interceptor.ShiroSecuredInterceptor</class>
    </interceptors>
</beans>

同样，为了让它在 EJB 上工作，首先在 /WEB-INF/ejb-jar.xml 中注册拦截器，如下所示（如果您在 EAR 中有单独的 EJB 项目，则在 /META-INF/ejb-jar.xml 中注册）：

<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
        http://java.sun.com/xml/ns/javaee/ejb-jar_3_1.xsd"
    version="3.1"
>
    <interceptors>
        <interceptor>
            <interceptor-class>com.example.interceptor.ShiroSecuredInterceptor</interceptor-class>
        </interceptor>
    </interceptors>
    <assembly-descriptor>
        <interceptor-binding>
            <ejb-name>*</ejb-name>
            <interceptor-class>com.example.interceptor.ShiroSecuredInterceptor</interceptor-class>
        </interceptor-binding>
    </assembly-descriptor>
</ejb-jar>

在 CDI 托管 bean 上，您需要设置自定义 @ShiroSecured 注释才能让拦截器运行。

@Named
@RequestScoped
@ShiroSecured
public class SomeBean {

    @RequiresRoles("ADMIN")
    public void doSomethingWhichIsOnlyAllowedByADMIN() {
        // ...
    }

}

这在 EJB 上不是必需的，ejb-jar.xml 已经在所有 EJB 上注册了它。

另见：

• Apache Shiro, is it ready for Java EE 6? - Declarative restriction in bean methods

Answer 2

基本上，我缺少的是 Shiro 的 Requires* 接口的实现，所以我根据自己的需要来实现。有兴趣的可以在这里找到：http://czetsuya-tech.blogspot.com/2012/10/how-to-integrate-apache-shiro-with.html