NestJS Http

HTTP 模块

Axios 是功能丰富的 HTTP 客户端包，被广泛使用。 Nest 封装了 Axios 并通过内置的 HttpModule 将其公开。 HttpModule 导出 HttpService 类，它公开了基于 Axios 的方法来执行 HTTP 请求。 该库还将生成的 HTTP 响应转换为 Observables。

安装

yarn add @nestjs/axios axios

HttpModule 和 HttpService 是从 @nestjs/axios 包导入的。

import { HttpModule } from '@nestjs/axios'

 HttpModule.register({
   timeout:10000
 }),

使用service

private readonly httpService: HttpService,

使用

import { Body, Controller, Get, Query, Post } from '@nestjs/common';
import { AppService } from './app.service';
import { Public } from './auth/public.guard';
import { HttpService } from '@nestjs/axios';
import { firstValueFrom } from 'rxjs'

@Controller()
@Public()
export class AppController {
  constructor(
    private readonly appService: AppService,
    private readonly httpService: HttpService,
  ) {}

  @Get('axios')
  async testAxios(){
    const data = this.httpService.get('https://m.maoyan.com/ajax/movieOnInfoList')
    console.log(data)
    return data
  }
}

执行报错

这是因为由于 HttpService 方法的返回值是一个 Observable，我们可以使用 rxjs - firstValueFrom 或 lastValueFrom 以 promise 的形式检索请求的数据。

完整示例

import { Body, Controller, Get, Query, Post } from '@nestjs/common';
import { AppService } from './app.service';
import { Public } from './auth/public.guard';
import { HttpService } from '@nestjs/axios';
import { firstValueFrom,catchError } from 'rxjs'
import { AxiosError } from 'axios'
import { response } from 'express';

@Controller()
@Public()
export class AppController {
  constructor(
    private readonly appService: AppService,
    private readonly httpService: HttpService,
  ) {}

  @Get('axios')
  async testAxios(){
    const { data } = await firstValueFrom(this.httpService.get('https://m.maoyan.com/ajax/movieOnInfoList').pipe(response=>response))
    console.log(data)
    return data
  }
}