看来我应该这样做:
通过将其设置为dispatchOptionsRequest来配置dispatcherServlet true
dispatchOptionsRequest
true
但是,考虑到我没有XML配置,或者DispatcherServlet代码中没有任何各种初始化程序类(此答案提到),该怎么做?
DispatcherServlet
在一个@RestController类中,我有一个像这样的方法,当前不会被调用。
@RestController
@RequestMapping(value = "/foo", method = RequestMethod.OPTIONS) public ResponseEntity options(HttpServletResponse response) { log.info("OPTIONS /foo called"); response.setHeader("Allow", "HEAD,GET,PUT,OPTIONS"); return new ResponseEntity(HttpStatus.OK); }
Spring Boot 1.2.7.RELEASE; 一个简单的设置与Spring REST指南并没有太大区别 。
选项1:Spring Boot属性(仅适用于Spring Boot 1.3.0+) 从Spring Boot 1.3.0开始,可以使用以下属性配置此行为:
spring.mvc.dispatch-options-request=true
选项2:自定义 DispatcherServlet DispatcherServlet在Spring Boot中由定义DispatcherServletAutoConfiguration。你可以DispatcherServlet在配置类中的某个位置创建自己的bean,而不是在自动配置中使用它:
DispatcherServletAutoConfiguration
@Bean(name = DispatcherServletAutoConfiguration.DEFAULT_DISPATCHER_SERVLET_BEAN_NAME) public DispatcherServlet dispatcherServlet() { DispatcherServlet dispatcherServlet = new DispatcherServlet(); dispatcherServlet.setDispatchOptionsRequest(true); return dispatcherServlet; }
但是请注意,定义你的DispatcherServletbean将禁用自动配置,因此你应该手动定义在autoconfiguration类中声明的其他bean,即ServletRegistrationBeanfor DispatcherServlet。
DispatcherServletbean
autoconfiguration
ServletRegistrationBeanfor DispatcherServlet
选项3: BeanPostProcessor
BeanPostProcessor
你可以创建BeanPostProcessor将bean初始化之前将dispatchOptionsRequest属性设置为的实现true。Yoy可以将其放在你的配置类中:
@Bean public DispatcherServletBeanPostProcessor dispatcherServletBeanPostProcessor() { return new DispatcherServletBeanPostProcessor(); } public static class DispatcherServletBeanPostProcessor implements BeanPostProcessor { @Override public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException { if (bean instanceof DispatcherServlet) { ((DispatcherServlet) bean).setDispatchOptionsRequest(true); } return bean; } @Override public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException { return bean; } }
选项4: SpringBootServletInitializer
SpringBootServletInitializer
如果你有SpringBootServletInitializer应用程序,则可以执行以下操作来启用OPTIONS调度:
public class ServletInitializer extends SpringBootServletInitializer { @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder application) { return application.sources(Application.class); } @Override public void onStartup(ServletContext servletContext) throws ServletException { super.onStartup(servletContext); servletContext.getServletRegistration(DispatcherServletAutoConfiguration.DEFAULT_DISPATCHER_SERVLET_BEAN_NAME) .setInitParameter("dispatchOptionsRequest", "true"); } }
但是,这仅在将应用程序作为WAR部署到Servlet容器中时才有效,因为SpringBootServletInitializer使用main方法运行Spring Boot应用程序时不会执行代码。
main