Angular 2 - Get Headers From Http Requests

Question

All my Backend API requests return new token information in headers, even when them throw exceptions. In the next request I need to send these new token information.

So I'm trying to figure out an unique and standard way to do that, so I'm trying:

let requestOptions = new RequestOptions(Object.assign({
      method: method,
      url: environment.apiHost + url,
      body: body,
      headers: authenticatedRequest ? this.requestService.getAuthHeaders() : this.requestService.getJsonHeaders(),
      withCredentials: authenticatedRequest
    }));

this.http.request(new Request(requestOptions))
        .map((res:Response) => { this.storageService.setAuthInfo(res.headers); res.json() } )
        .catch((error:any) => Observable.throw(error.json().error || 'Server error'));

The problem I'm facing with is that when I subscribe to this method, res variable is returning undefined.

What do you suggest me?

Community · Accepted Answer · 2017-05-23 11:46:48Z

3

The problem is you have to return a response res.json() explicitly from your map function as you used {}.

this.http.request(new Request(requestOptions))
   .map((res:Response) => { 
       this.storageService.setAuthInfo(res.headers); 
       return res.json();
   } )
   .catch((error:any) => Observable.throw(error.json().error || 'Server error'));

Similar answer here

edited May 23, 2017 at 11:46

CommunityBot

11 silver badge

answered Nov 23, 2016 at 14:28

Pankaj Parkar

136k23 gold badges241 silver badges307 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Pasp Ruby Over a year ago

It solved the related problem, but I'm facing a new one: When an error happens, it is not passing by map(), so it doesn't register new tokens. The solution would be set new token (this.storageService.setAuthInfo(res.headers);) on catch() also unless there is a request method which is called on success and error return. Any idea?

Pankaj Parkar Over a year ago

@PaspRuby I'd say its worth opening new question, other people can also jump in with thoughts..

Pasp Ruby Over a year ago

Ok, here it is: stackoverflow.com/questions/40769737/… @Pankaj Parkar

Collectives™ on Stack Overflow

Angular 2 - Get Headers From Http Requests

1 Answer 1

3 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related