getRequest.ts

import { Injectable } from '@angular/core';
import { Http, Response,RequestOptions,Headers,RequestMethod} from '@angular/http';
import { Observable } from 'rxjs/Rx';
import 'rxjs/add/operator/map';
import * as _ from "lodash";
import {OauthUtility} from './oauth';
// Object Type
import { Product } from './data/product';
import {MagentoProduct} from './data/magentoProduct';
import { Logo } from './data/logo';
import { Category } from './data/category';
import { Size } from './data/size';
import { Color } from './data/color';
import {environment} from '../../../environments/environment';
//import {CordovaOauthMagento} from 'ng2-oauth-magento/core';

@Injectable()
export class productService {
    private base: string = './assets/json/';
    private baseURL: string = 'http://159.89.46.186/rest/default/V1/categories';
    private URLProductos: string = 'http://159.89.46.186/rest/default/V1/products?searchCriteria%5BpageSize%5D=10';
    private headers = new Headers();
    
    constructor(private http:Http){
    }

    // Get Products
    getProduct(): Observable<Product[]>{
        const options = new RequestOptions({headers: this.headers,method:'GET'});
        //console.log(options);
        return this.http.get(this.base + 'product.json',options)
          .map((res:Response) => res.json());
    }

    appendHeaders(){
      let authString= 'Bearer hfwnkowu3elsommq10hbgfs2a46fjgek';
      this.headers.append('Authorization', authString);
      this.headers.append('Content-Type','application/x-www-form-urlencoded');
    }
    getProductsMagento(){
      this.appendHeaders();
      const options = new RequestOptions({headers: this.headers, method:'GET'});
      return this.http.get(this.URLProductos,options).map((res:Response) => res.json());
    }
}