如何从aop @before到spring Controller方法的建议获取更新/修改的httpservletrequest对象

Question

我在Spring Boot应用程序中使用了Spring AOP @Before建议，并且在击中任何API之前应该执行。 我的任务/要求： - 如果未传递“请求标题”应用程序名称，则我们应该修改标题，并将每个API的应用程序名称添加到“未知”值中。 我正在使用httpservletwrapper类中的AOP @BEFore建议中修改标题，如下所示。

问题是 - AOP应将更新的HttpservletRequest返回到控制器方法，但它不起作用，不返回控制器中的更新器。

控制器： -

@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);
}

弹簧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，

而不是使用@before建议使用的@around建议，而应使用consge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请求正在使用控制器方法。谢谢