Add headers HttpRequest in NestJS

user_8107464 0
Viewed 34463

I'm trying to make a Http request in NestJS

As it's inspired from angular I jave append my Headers

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

Then call the api

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

I get an error

ReferenceError: Headers is not defined

And when I ass Headers to import I get this message waring in VScode

Only a void function can be called with the 'new' keyword.
angular nestjs httprequest javascript
4 Answers

NestJS uses axios under the hood to make http requests, take a look at its documentation for request configuration:

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

Looks like there is no interface for headers, just pass a plain JS dictionary object:

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 });
user_36658780

I think this method false in for read headers parameter just req.headers example

 @Get()
    findHeaderexample(@Res() res,@Req req) {
        return req.headers;
}
user_101342850

Another option (since nest v5 introduced HttpModule.registerAsync) if your encodeToken is pretty static or hardcoded from your config is setting it up in the module level:

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 {}
user_66228100

If you want to set a custom header, you can use @ApiHeader()

@ApiHeader({
  name: 'api-key',
  description: 'api-key',
})
user_64777920
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