http URL not calling in Angular

Http uses rxjs and is a cold/lazy observable, meaning that you should subscribe to it to make it work.

  this.http.get(`http://swapi.co/api/people/1`).map((response:Response) => {
                console.log(response.json());
                response.json();
            }).subscribe();

Or if you want to subscribe from somewhere else , you should return the http.get method like this : :

 getAllPersons():Observable<any>{
    console.log("Here");
       return this.http.get(`http://swapi.co/api/people/1`).map((response:Response) => {
        console.log(response.json());
        response.json();
    });
    } 

and then :

   getAllPersons().subscribe();