A simple TypeScript REST API Service implementation (GET & POST)

new.service.ts

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

import 'rxjs/add/operator/toPromise';

@Injectable()
export class NewService {

    constructor(private http: Http) {}

    getData(url: string): Promise<Object[]> {
        return this.http.get(url)
                        .toPromise()
                        .then(response => response.json() as Object[])
                        .catch(this.handleError);
    }

    postData(url: string, data: any): Promise<Object> {
        let headers = new Headers({ 'Content-Type': 'application/json' });
        let options = new RequestOptions({ headers: headers });
        return this.http.post(url, data, headers)
                        .toPromise()
                        .then(response => response.json())
                        .catch(this.handleError);
    }
    
    private handleError(error: any): Promise<any> {
        console.error('An error occurred', error);
        return Promise.reject(error.message || error);
    }
}