AOP @Around:返回 BAD_REQUEST 响应 [英] AOP @Around: return BAD_REQUEST response

问题描述

在 Spring rest 应用程序中，每个 URL 都必须以应用程序 ID (appId) 开头.此 appId 必须在每个休息服务中进行验证.我没有复制代码，而是尝试使用 @Around 建议创建一个 @Aspect.这是在任何 rest 方法之前正确执行的.

In a Spring rest application, every single URL must start with an application id (appId). This appId must be validated in every single rest service. Instead of duplicating code, I tried to create an @Aspect with an @Around advice. This is correctly executed before any rest method.

但是，如果应用程序 ID 未知，我既不想创建堆栈跟踪，也不想返回 200(响应 OK).相反，我确实想返回 BAD_REQUEST 响应代码.

However, if the application id is unknown, I do not want neither to create a stack trace or neither to return a 200 (response OK). Instead I do want to return a BAD_REQUEST response code.

如果我在建议中抛出异常，我会得到堆栈跟踪，但没有 HTTP 响应.另一方面，如果我返回任何其他内容(但不调用 pjp.proceed)，我会得到 200 的返回代码.

If I throw an exception in my advice, I get a stack trace and no HTTP response. If I on the other hand return anything else (but do not call the pjp.proceed), I get a return code of 200.

有人可以帮助我将响应代码 400 返回给请求者吗?

Could anyone please assist me on returning a response code 400 to the requestor?

在我的代码下面:

@Component
@Aspect
public class RequestMappingInterceptor {

    @Autowired
    ListOfValuesLookupUtil listOfValuesLookupUtil;

    @Around("@annotation(requestMapping)")
    public Object around(ProceedingJoinPoint pjp, RequestMapping requestMapping) throws Throwable {
        Object[] arguments = pjp.getArgs();
        if(arguments.length == 0 || !listOfValuesLookupUtil.isValidApplication(arguments[0].toString())) {
            // toto : return bad request here ...
            throw new BadRequestException("Application id unknown!");
        } else {
            return pjp.proceed();
        }
    }
}

推荐答案

您需要访问 HttpServletResponse 并使用它来发送错误代码.您可以通过 RequestContextHolder

You need to access the HttpServletResponse and use that to send the error code. You can do this via the RequestContextHolder

@Around("@annotation(requestMapping)")
public Object around(ProceedingJoinPoint pjp, RequestMapping requestMapping) throws Throwable {
    Object[] arguments = pjp.getArgs();
    if(arguments.length == 0 || !listOfValuesLookupUtil.isValidApplication(arguments[0].toString())) {
        HttpServletResponse response = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getResponse());
        response.sendError(HttpStatus.PRECONDITION_FAILED.value(), "Application Id Unknown!");
        return null;
    } else {
        return pjp.proceed();
    }
}

这篇关于AOP @Around:返回 BAD_REQUEST 响应的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！