Angular PUT request sample code for rest service

Main component code
====================
@Component({
  selector: 'name',
  template: require('./name.template.html'),
  providers: [NameService],
})

export class NameComponent implements OnInit {

constructor(private _ns: NameService) {
      -------------
  -------------
    }

ngOnInit() {
----------
----------
}

saveNameDetails(obj) {
let dataList = {};
dataList['name'] = obj['name'];
_ns.save(dataList);
}
}

service component code:
========================
import { Response, Http } from '@angular/http';
--------------------
--------------------
@Injectable()
export class NameService {

constructor(private _http: Http) { }

  save(body) : Observable<any> {

    return this._http.put(URL, body, this.headerOptions)
      .map(this.extractData)
      .map(this.doAction)
      .catch(this.handleErrorMessage);
  }

  private extractData(res: Response) {
    return res;
  }

  private doAction(response: any) {
    return response;
  }

  private handleErrorMessage(errorObj: Response | any) {
    let _body = JSON.parse(errorObj['_body']) || {};
    let errorMessage: string;
    switch (errorObj.status) {
      case 400:
      case 401:
        errorMessage = _body['error'];
        break;
      case 404:
        break;
    }
    return Observable.throw(errorMessage);
  }
  ---------------------
  ---------------------
  }