从 HttpServletRequest 获取目标控制器答案

【问题标题】：Get destination controller from a HttpServletRequest从 HttpServletRequest 获取目标控制器
【发布时间】：2017-05-01 11:07:19
【问题描述】：

我已经设置了 spring security 来验证和授权进入我的应用程序的请求。我已经这样设置了配置：

 public class OAuth2ServerConfiguration extends ResourceServerConfigurerAdapter {

        @Override
        public void configure(ResourceServerSecurityConfigurer resources) {

            // ...set up token store here

            resources.authenticationEntryPoint(new AuthenticationEntryPoint() {
                @Override
                public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException) throws IOException, ServletException {

                 //QUESTION
                 // How do I get the destination controller that this request was going to go to?
                 // Really, I'd like to get some information about the annotations that were on the destination controller.

                    response.setStatus(401);
                }
            });
        }

我想获取有关此请求将要到达的目标控制器的一些信息。在这种情况下，控制器实际上不会受到影响，因为弹簧安全性在响应到达控制器之前启动并抛出了响应。

有什么建议吗？谢谢！

【问题讨论】：

标签： java spring spring-security spring-security-oauth2

【解决方案1】：

假设 OAuth2ServerConfiguration 是 Spring 托管的 bean，这应该适合您。

...

@Autowired
private List<HandlerMapping> handlerMappings;

for (HandlerMapping handlerMapping : handlerMappings) {
  HandlerExecutionChain handlerExecutionChain = handlerMapping.getHandler(request);
  if (handlerExecutionChain != null) {
     // handlerExecutionChain.getHandler() is your handler for this request
  }
}

如果无法自动装配一个 HandlerMapping 列表，自动装配 ApplicationContext 并进行如下调整。

for (HandlerMapping handlerMapping : applicationContext.getBeansOfType(HandlerMapping.class).values()) {
  HandlerExecutionChain handlerExecutionChain = handlerMapping.getHandler(request);
  if (handlerExecutionChain != null) {
     // handlerExecutionChain.getHandler() is your handler for this request
  }
}

【讨论】：

这给了我一个错误提示“无法自动装配。找不到 HandlerMapping 或 List 的bean”
@Jeff，看看我的修正

【解决方案2】：

你可以试试这个：

@Configuration
public class WebMvcConfiguration extends WebMvcConfigurerAdapter {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new HandlerInterceptor() {
            @Override
            public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
                return true;
            }

            @Override
            public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

            }

            @Override
            public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
                // handler is the controller
                MyAnnotation annotation = ((HandlerMethod) handler).getMethod().getAnnotation(MyAnnotation.class)
                // do stuff with the annotation
            }
        });
    }
}

【讨论】：