AppComponent - Async HTTP Interceptors with Angular 4

app.component.ts

import { Component, OnInit } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Component({
    selector: 'my-app',
    template: '<div></div>'
})
export class AppComponent implements OnInit {

    constructor (private http: HttpClient) {}

    ngOnInit () {

        // immediately make a request
        this.http.get('/user/me')
            .subscribe(response => {
                // ... do something with response
            });

    }
}