在NestJS中添加标头HttpRequest

Question

我正在尝试在NestJS中发出Http请求

由于它是受角度启发的，因此我添加了标题

import { Injectable, HttpService} from '@nestjs/common';
...
const headersRequest = new Headers();
headersRequest.append('Content-Type', 'application/json');
headersRequest.append('Authorization', `Basic ${encodeToken}`);

然后调用api

const result = await this.httpService.post(apiUrl, newDevice, { headers: headersRequest });

我得到一个错误

ReferenceError: Headers is not defined

当我Headers导入时，我在VScode中收到此消息警告

Only a void function can be called with the 'new' keyword.

Answer 1

NestJS 在后台使用axios发出http请求，请查看其有关请求配置的文档：

https://github.com/axios/axios#request-config

看起来没有标题的接口，只需传递一个普通的JS字典对象：

const headersRequest = {
    'Content-Type': 'application/json', // afaik this one is not needed
    'Authorization': `Basic ${encodeToken}`,
};

const result = await this.httpService.post(apiUrl, newDevice, { headers: headersRequest });

Answer 2

如果您的配置相当静态或硬编码，则另一种选择（自 Nest v5 引入了 HttpModule.registerAsync 以来）encodeToken是在模块级别进行设置：

import { Module, HttpModule } from '@nestjs/common';
import { ConfigModule } from '..';
import { ConfigService } from '../config/config.service';


@Module({
  imports: [
    ConfigModule,
    HttpModule.registerAsync({
      imports: [ConfigModule],
      useFactory: async (configService: ConfigService) => ({
        baseURL: configService.get('vendors.apiEndpoint'),
        headers: {          
          'Authorization': 'Basic ' + configService.get('vendors.encodeToken')
        },
        timeout: 7000,
        maxRedirects: 5
      }),
      inject: [ConfigService]
    })
  ],
  // ... other module stuff
})

export class MyModule {}