我想获取我的 Graph API 令牌，但出现错误，我正在使用 HttpServices 发出 POST 请求。 我收到 400 状态码。 我正在使用 NestJS

Question

**This is my code when I'm creating the class and the method:**

@Injectable()
export class MicrosoftGraph {
constructor(private httpService: HttpService) {} 
  getMicrosoftGraphToken() {
    const data = {
      client_id: 'myclientid',
      scope: 'https://graph.microsoft.com/.default',
      client_secret: 'myclientsecret',
      grant_type: 'client_credentials'
    }
const url = 
'https://login.microsoftonline.com/mytenantid/oauth2/v2.0/token';
    const response = this.httpService.post(url, data).pipe(
      tap((resp) => console.log(resp)),
      map((resp) => resp.data),
      tap((data) =>  console.log(data)),
    );
    console.log(response);
    return response;
  }
}

This is the part of the controller:

@Controller('user')
export class UsersController {
  constructor(private readonly microsoftGraph: MicrosoftGraph) {} 
  @Get('hola')
  intento(@Res() res: Response, @Req() req: Request){
    return this.microsoftGraph.getMicrosoftGraphToken();
  }
}

And this is the error I'm getting:

Observable {
  source: Observable {
    source: Observable {
      source: [Observable],
      operator: [Function (anonymous)]
    },
    operator: [Function (anonymous)]
  },
  operator: [Function (anonymous)]
}
[Nest] 19464  - 08/30/2022, 8:05:31 AM   ERROR [ExceptionsHandler] Request failed with status code 400
[Nest] 19464  - 08/30/2022, 8:05:31 AM   ERROR [ExceptionsHandler] undefined

I'm trying to get this token to be able to make a function where I can pull a list of users in my company, please help and thanks

Answer 1

Not sure if you solved this already, but the problem is in your URL. You have hardcoded the tenantId part. So instead of:

 const url = 'https://login.microsoftonline.com/mytenantid/oauth2/v2.0/token';

It should probably be something like this:

 const graphTenantId = `1234-abcd-etc-etc`; const url = `https://login.microsoftonline.com/${graphTenantId}/oauth2/v2.0/token`;

The way you are currently doing it, is that you are trying to get the tenant with ID "mytenantid".

Also, since you are using NestJS, I would advise you to use the.env file to save the data that you now put in your "data" constant and similar to the tenant_id that you still need to add. This of course only applies when these values are set in stone. The NestJS documentation has a great summary on how to do this.

If you have dynamic data in regards to the Graph API (so you would have clients that would connect through your NestJS application), you can probably best make a GraphConfiguration object which you then get using a service (that's the way I did it).

Hope this helps you!