NestJS 拦截器 - 如何在响应结束后获取响应状态码

Question

在拦截器中，我可以通过 context.getArgByIndex(1) 获取响应状态。此代码记录了我想要的 403 状态代码。但是这段代码 context.getArgByIndex(1).statusCode return 对我来说是状态 201。我从服务中丢弃了状态 403。

拦截器代码

import { Injectable, NestInterceptor, ExecutionContext, CallHandler } from '@nestjs/common';
import { Observable } from 'rxjs';
import { map, tap } from 'rxjs/operators';
import { LogsService } from './logs.service';

@Injectable()
export class LogsInterceptor implements NestInterceptor {
  constructor( private readonly logService: LogsService ) {}
  intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
    
    
    this.logService.constructorData(context)

    console.log(context.getArgByIndex(0)) --- **This code logs the correct status**
    console.log(context.getArgByIndex(0).statusCode) --- **This code logs status 201**

    return next.handle()    
  }
}

为测试抛出错误的服务代码

async findAll(): Promise<PodsDto[]> {
     throw new ForbiddenException()
     return this.PodsRepository.find()
}

Answer 1

也许不是一个好的选择，但它确实有效。

拦截器代码

@Injectable()
export class LogsInterceptor implements NestInterceptor {
  constructor( private readonly logService: LogsService ) {}
  intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
    
    const ctx = context.switchToHttp();
    const response = ctx.getResponse();

    response.on('close', ()=>{
      this.logService.constructorData(context)
    })

    return next.handle()
  }
}

NestJS 拦截器 - 如何在响应结束后获取响应状态码

NestJS Interceptor - how to get response status code after response is end

node.js

typescript

nestjs