Encountering a 401 Unauthorized error due to CORS origin issue when making a post request with HttpClient in Angular

Question

Encountering a 401 Unauthorized error due to CORS origin issue when making a post request with HttpClient in Angular

Encountering an error when trying to upload data to my backend Firebase database.

Here are the relevant code snippets:

storeUsers(users: any[]){
        return this.http.post('https://promise-90488.firebaseio.com/data.json', users);
    }

appcomponent.ts:

const result = Object.assign({}, this.userForm.value );
console.log(result);
this.userService.storeUsers(result)
      .subscribe(
        (response) => console.log(response),
        (error) => console.log(error)
      );

The error messages are as follows:

POST 401 (Unauthorized) app.component.ts:37 HttpErrorResponse {headers: HttpHeaders, status: 401, statusText: "Unauthorized", url: "", ok: false, …} error: {error: "Permission denied"} headers: HttpHeaders {normalizedNames: Map(0), lazyUpdate: null, lazyInit: ƒ} message: "Http failure response for : 401 Unauthorized" name: "HttpErrorResponse" ok: false status: 401 statusText: "Unauthorized" url: "" proto: HttpResponseBase

angular typescript cors angular5 angular-httpclient

Answer 1

Answer №1

It appears that the authorization header is missing from your request

const httpOptions = {
  headers: new HttpHeaders({
    'Authorization': 'my-auth-token'
  })
};

return this.http.post('https://promise-90488.firebaseio.com/data.json', users, httpOptions);

For more information, please refer to the documentation here

To ensure that authorization headers are included in all requests, you can create an interceptor:

import { AuthService } from '../auth.service';

@Injectable()
export class AuthInterceptor implements HttpInterceptor {

  constructor(private auth: AuthService) {}

  intercept(req: HttpRequest<any>, next: HttpHandler) {
    // Retrieve the authorization token from the service.
    const authToken = this.auth.getAuthorizationToken();

    // Clone the request and update the headers with the authorization token.
    const authReq = req.clone({
      headers: req.headers.set('Authorization', authToken)
    });

    // Send the modified request with the header to the next handler.
    return next.handle(authReq);
  }
}

You can learn more about interceptors here

Answer 2

It appears that the authorization header is missing from your request

const httpOptions = {
  headers: new HttpHeaders({
    'Authorization': 'my-auth-token'
  })
};

return this.http.post('https://promise-90488.firebaseio.com/data.json', users, httpOptions);

For more information, please refer to the documentation here

To ensure that authorization headers are included in all requests, you can create an interceptor:

import { AuthService } from '../auth.service';

@Injectable()
export class AuthInterceptor implements HttpInterceptor {

  constructor(private auth: AuthService) {}

  intercept(req: HttpRequest<any>, next: HttpHandler) {
    // Retrieve the authorization token from the service.
    const authToken = this.auth.getAuthorizationToken();

    // Clone the request and update the headers with the authorization token.
    const authReq = req.clone({
      headers: req.headers.set('Authorization', authToken)
    });

    // Send the modified request with the header to the next handler.
    return next.handle(authReq);
  }
}

You can learn more about interceptors here

Encountering a 401 Unauthorized error due to CORS origin issue when making a post request with HttpClient in Angular

Answer №1

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