exception-handling - NestJs - 从异常过滤器发送响应

Question

我试图实现一个简单的行为:每当抛出异常时，我想将错误作为响应发送。我的那种天真的代码看起来像这样，但根本没有响应:

异常过滤器:

import { ExceptionFilter, ArgumentsHost, Catch } from '@nestjs/common';

@Catch()
export class AnyExceptionFilter implements ExceptionFilter {
  catch(exception: any, host: ArgumentsHost) {
    return JSON.stringify(
      {
        error: exception,
      },
      null,
      4,
    );
  }
}

模块

@Module({
  imports: [],
  controllers: [AppController, TestController],
  providers: [AppService, AnyExceptionFilter],
})
export class AppModule {}

main.ts

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  app.useGlobalFilters(new AnyExceptionFilter());
  await app.listen(1212);
}
bootstrap();

有什么我想念的吗？提前致谢 :)

Answer 1

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

@Catch()
export class AnyExceptionFilter implements ExceptionFilter {
  catch(error: Error, host: ArgumentsHost) {

    const response = host.switchToHttp().getResponse();

    const status = (error instanceof HttpException) ? error.getStatus() : HttpStatus.INTERNAL_SERVER_ERROR;

    response
      .status(status)
      .json(error);
  }
}

这段代码对我来说似乎工作正常。

嵌套版本:5.0.1