如何在通知Spring控制器方法之前从AOP @获取更新/修改的HttpServletRequest对象

Question

我在Spring引导应用程序中使用了Spring @Before，它应该在访问任何API之前执行。我的任务/要求:- -如果在请求头应用程序中没有传递名称--那么我们应该修改头部，并为每个API向应用程序添加“未知”值。我正在使用HttpServletWrapper类修改AOP @ as通知中的标头，如下所示。

问题是- AOP应该将更新的HttpServletrequest返回给控制器方法，但是它不能工作，不能在控制器中返回更新的方法。

控权人：

@GetMapping
@RequestMapping("/demo")
public ResponseEntity<String> getEmployee(HttpServletRequest request) {
    
    System.out.println("Header, application-name"+request.getHeader("application-name"));
    return new ResponseEntity<>("Success", HttpStatus.OK);
}

春季AOP代码，

@Aspect
@Component
public class AOPExample {

   @Pointcut("@annotation(org.springframework.web.bind.annotation.GetMapping) ||"
        + "@annotation(org.springframework.web.bind.annotation.PostMapping)")
   public void controllerRequestMapping() {}

   @Before("controllerRequestMapping()")
   public HttpServletRequest advice(JoinPoint jp) {
    
       HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes())
            .getRequest();
       String header = request.getHeader("application-name");
       if (header == null) {
            HttpServletRequestWrapperClass wrappedRequest = new HttpServletRequestWrapperClass(request);
            wrappedRequest.putHeader("application-name", "Unknown");
            request = wrappedRequest;
       } else {
           //validate application name
          //400 - throw bad request exception
       }
       System.out.println("After setting---"+request.getHeader("application-name"));
       return request;
     }
  }

Answer 1

最后我解决了这个问题，

与使用“在通知使用之前”代替使用“the通知”，Before通知应该使用Instead方法返回对象。

@Aspect   
@Component   
public class AOPExample {

   @Pointcut("@annotation(org.springframework.web.bind.annotation.GetMapping) ||"
        + "@annotation(org.springframework.web.bind.annotation.PostMapping)")
   public void controllerRequestMapping() {}

   @Around("controllerRequestMapping()")
   public Object advice(ProceedingJoinPoint jp) throws Throwable {
    
         HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes())
            .getRequest();
         String header = request.getHeader("application-name");
         System.out.println("Header in AOP"+header);
         if (header == null) {
              HttpServletRequestWrapperClass wrappedRequest = new HttpServletRequestWrapperClass(request);
              wrappedRequest.putHeader("application-name", "Unknown");
              request = wrappedRequest;
        } else {
            //validate application name
            //400 - throw bad request exception
            //throw new BadRequestException("Invalid application name");
        }
        System.out.println("After setting---"+request.getHeader("application-name"));
        return jp.proceed(new Object[] {request});
    }
}

更新的httpservlet请求正在进入控制器方法中。谢谢