我可以将Spring MVC servlet的WebApplicationContext注入DelegatingFilterProxy吗?

时间:2013-07-29 11:07:49

标签: spring spring-mvc spring-security

我正在创建一个OAuth授权服务器,它使用Spring Security作为我的servlet部分的安全层。其中一个重要部分是使用DelegatingFilterProxy映射到 springSecurityFilterChain bean,这需要WebApplicationContext个实例。

标准解决方案是包含ContextLoaderListener及其关联的 contextConfigLocation 配置。但这需要为根WebApplicationContext创建一个单独的配置,在我看来不必要地使事情变得复杂。

根据Spring MVC文档,每个DispatcherServlet都有自己的WebApplicationContext实例。更重要的是,通过仔细阅读DelegatingFilterProxy的代码,应该可以在构建时注入WebApplicationContext实例。

所以我的问题是:我可以将DispatcherServlet WebApplicationContext设置为DelegatingFilterProxy的实例吗?

以下是我目前的相关配置:

的web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1"
         xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="
            http://xmlns.jcp.org/xml/ns/javaee
            http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">

    <!-- Enable Spring Security -->
    <filter>
        <filter-name>springSecurityFilterChain</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    </filter>

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

    <servlet>
        <servlet-name>oauth</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>    
        <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>/WEB-INF/servlet.xml</param-value>
        </init-param>
    </servlet>

    <servlet-mapping>
        <servlet-name>oauth</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

servlet.xml中:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:oauth="http://www.springframework.org/schema/security/oauth2"
    xmlns:security="http://www.springframework.org/schema/security"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/security/oauth2
        http://www.springframework.org/schema/security/spring-security-oauth2-1.0.xsd
        http://www.springframework.org/schema/security
        http://www.springframework.org/schema/security/spring-security.xsd">

    <mvc:annotation-driven/>

    <!-- ... Spring MVC config ... -->

    <!-- Spring Security OAuth Config -->
    <security:global-method-security pre-post-annotations="enabled" />

    <oauth:authorization-server client-details-service-ref="clientDetails"
                                token-services-ref="tokenServices"
                                token-endpoint-url="/api/token">
        <oauth:refresh-token/>
        <oauth:client-credentials/>
    </oauth:authorization-server>

    <!-- ... loads more OAuth config ... -->

</beans>

1 个答案:

答案 0 :(得分:2)

DispatcherServlet(正如FrameworkServlet的任何子类)将使用attribure名称WebApplicationContextServletContext中发布其org.springframework.web.servlet.FrameworkServlet.CONTEXT.<servlet-name>

同时,DelegatingFilterProxy可以通过设置WebApplicationContext参数来告知不要使用根ServletContext,而是另一个存储在contextAttribute中。

在您的情况下,所需的配置将是:

<filter>
        <filter-name>springSecurityFilterChain</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    <init-param>
        <param-name>contextAttribute</param-name>
        <param-value>org.springframework.web.servlet.FrameworkServlet.CONTEXT.oauth </param-value>
    </init-param>
</filter>

详细了解DelegatingFilterProxy如何在findWebApplicationContext()的javadoc中查找WebApplicationContext