Angular GET http：// localhost / 401（未经授权）错误

Question

I have a problem loading the user data into the page. I get this Error: GET http://localhost/ 401 (Unauthorized).

In Laravel I've put this into my controller to get all user data:

public function index()
{
 $user = User::all(); return response()->json($user,201);
}

In Angular I've created a data.service file with this code:

@Injectable({
    providedIn: 'root'
})

export class DataService {
  constructor(private http: HttpClient) { }
  findAll(): Observable<User[]>{return this.http.get<User[]>('http://localhost');}
}

And In the app.component.ts file, I used this method to get the data:

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})

export class AppComponent implements OnInit{
  users$: User[];
  constructor(private dataService: DataService){}
  ngOnInit(){return this.dataService.findAll().subscribe(data => this.users$ = data);}
}

In the app.component.html file I've looped through the data:

<div *ngFor='let user of users$'>{{user.name}}</div>

Answer 1

Is this an error returned by angular or laravel? Also please note the following:

1. You're not specifying the port at localhost
2. You are defining user$ as an array not an observable, so the async pipe won't work, instead you can either declare user$ as an observable or remove the async pipe.

Here is the better solution:

export class AppComponent implements OnInit{
  users$: Observable<User[]>;
  constructor(private dataService: DataService){}
  ngOnInit(){
    this.user$ = this.dataService.findAll()
  }
}

and in HTML keep your current code as it is:

<div *ngFor='let user of users$'>{{user.name}}</div>