HttpInterceptor->Service->HttpClient Cyclic Dependency

Question

So I have my authentication service, AuthService, that basically has two methods, one that gets a new token from the server, given a username and a password

Answer 1

I was running into the same or a similar issue using Angular 6.1.10. I simply instantiated HttpClient myself inside the service that need to be injected into an HttpInterceptor:

@Injectable()
export class AuthService {

  private http: HttpClient;

  constructor(httpBackend: HttpBackend) {
    this.http = new HttpClient(httpBackend);    
  }
}

That broke the infinite loop issue in my case.