在Spring Boot中设置响应头

Question

如何在使用Spring Boot创建的应用程序中为每个调用设置响应头？我想尝试使用过滤器来拦截所有调用,并能够设置响应头.我按照指南禁用浏览器缓存HTML5,但只设置请求标头,而不是总是.

Answer 1

有三种方法可以做到这一点:

1. 在Controller类中设置特定控制器的响应:

   @Controller
   @RequestMapping(value = DEFAULT_ADMIN_URL + "/xxx/")
   public class XxxController
   ....
       @ModelAttribute
       public void setResponseHeader(HttpServletResponse response) {
          response.setHeader("Cache-Control", "no-cache");
          ....
       }
   

   要么

   @RequestMapping(value = "/find/employer/{employerId}", method = RequestMethod.GET)
   public List getEmployees(@PathVariable("employerId") Long employerId, final HttpServletResponse response) {
       response.setHeader("Cache-Control", "no-cache");
       return employeeService.findEmployeesForEmployer(employerId);
   }
   

   2. 或者你可以在应用程序中为每个调用放置响应头(这是基于Spring注释的,否则看到自动为每个响应添加头):

   @Component
   public class Filter extends OncePerRequestFilter {
   ....
    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
           throws ServletException, IOException {
       //response.addHeader("Access-Control-Allow-Origin", "*");
       //response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1.
       response.setHeader("Cache-Control", "no-store"); // HTTP 1.1.
       response.setHeader("Pragma", "no-cache"); // HTTP 1.0.
       response.setHeader("Expires", "0"); // Proxies.
       filterChain.doFilter(request, response);
    }
   }
   

   3. 我找到的最后一种方法是使用一个扩展HandlerInterceptorAdapter的Interceptor; 有关详细信息,请参阅https://www.concretepage.com/spring/spring-mvc/spring-handlerinterceptor-annotation-example-webmvcconfigureradapter

      • 创建扩展HandlerInterceptorAdapter的Interceptor:

   public class HeaderInterceptor extends HandlerInterceptorAdapter {
   
     @Override
     public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object handler) {
       httpServletResponse.setHeader("Cache-Control", "no-store"); // HTTP 1.1.
       httpServletResponse.setHeader("Pragma", "no-cache"); // HTTP 1.0.
       httpServletResponse.setHeader("Expires", "0"); // Proxies.
       return true;
     }
   }
   

   • 在你的MvcConfig中,它扩展了WebMvcConfigurerAdapter,你必须覆盖addInterceptors方法并添加新的Interceptor:

   @Override
   public void addInterceptors(InterceptorRegistry registry) {
       ....
       registry.addInterceptor(new HeaderInterceptor());
   }
   

我希望我能提供帮助!