如何从自定义异常过滤器返回JSON结果？

import { ExceptionFilter, Catch, ArgumentsHost, HttpException } from '@nestjs/common';
import { Request, Response } from 'express';

@Catch(HttpException)
export class HttpExceptionFilter implements ExceptionFilter {
  catch(exception: HttpException, host: ArgumentsHost) {
    const ctx = host.switchToHttp();
    const response = ctx.getResponse<Response>();
    const request = ctx.getRequest<Request>();
    const status = exception.getStatus();

    response
      .status(status)
      .json({
        statusCode: status,
        timestamp: new Date().toISOString(),
        path: request.url,
      });
  }
}

import { Controller, UseFilters } from '@nestjs/common';
import { HttpExceptionFilter } from './http-exception.filter';

@Controller()
@UseFilters(new HttpExceptionFilter())
export class AppController {
  // ...
}

import { HttpException, HttpStatus } from '@nestjs/common';

export class AppService {
  getHello(): string {
    throw new HttpException('Forbidden', HttpStatus.FORBIDDEN);
  }
}

{
  "statusCode": 403,
  "timestamp": "2022-01-01T00:00:00.000Z",
  "path": "/hello"
}