I can't get an error response node.js return in angular

Question

I want to get an error response message sent by node with angular, but I can not do that.

Node.js:

res.status(401).send({ "ERROR": "001", "message": "this is error" });

Angular:

public get(body) {
    return this.httpClient.post(`${this.API_URL}~`, body).catch(this.handleError);;
  }

  private handleError(error: any) {
    console.log(error);
    return Observable.throw(error);
  }

console in chorme

Http failure response for http://localhost:8000/~: 401 Unauthorized

response in chome

{"ERROR": "001", "message": "this is error"}

Although I can confirm it on the chrome network , I can not use the error message in angular because the output in console.log is 'Http failure response for http: // localhost: 8000 / ~: 401 Unauthorized'

wentjun · Accepted Answer · 2019-06-27 02:58:04Z

3

When it comes to error handling in Angular, the best practice would be to handle it through pipeable operations using RxJS operators.

You can do so by using the catchError operator.

import { catchError } from 'rxjs/operators';
.
.

public get(body) {
  return this.httpClient.post(`${this.API_URL}~`, body)
    .pipe(
      map(...),
      catchError(error => {
        // to get error response object
        console.log(error);
        // handle the rest of the error here
      })
    );
}

To access the error code, you can use error.status.

To access the error message, you can use error.message.

answered Jun 27, 2019 at 2:58

wentjun

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2 Comments

KTT Over a year ago

I'm sorry. I wrote the wrong intercept method of the ErrorInterceptor class I wrote. The error was able to be acquired with angular even with existing code

wentjun Over a year ago

@KATUO I guess you must have solved your problem then? Glad to hear that :)

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