Angular - Set headers for every request

Question

I need to set some Authorization headers after the user has logged in, for every subsequent request.

---

To set headers for a particular request,

Answer 1

How about Keeping a Separate Service like follows

            import {Injectable} from '@angular/core';
            import {Headers, Http, RequestOptions} from '@angular/http';


            @Injectable()
            export class HttpClientService extends RequestOptions {

                constructor(private requestOptionArgs:RequestOptions) {
                    super();     
                }

                addHeader(headerName: string, headerValue: string ){
                    (this.requestOptionArgs.headers as Headers).set(headerName, headerValue);
                }
            }

and when you calling this from another place use this.httpClientService.addHeader("Authorization", "Bearer " + this.tok);

and you will see the added header eg:- Authorization as follows