HttpHandler Short

import { Http, RequestOptionsArgs, Headers, RequestOptions, Response } from '@angular/http';
import 'rxjs/add/operator/toPromise';
import { Injectable } from '@angular/core';

@Injectable()
export class HttpHandler {
    constructor(public http: Http) {
    }

    public Get(url: string): Promise<Response> {
        return this.http.get(this.composeUrl(url), this.getRequestOptionArgs()).toPromise();
    }

    private getRequestOptionArgs(options?: RequestOptionsArgs): RequestOptionsArgs {
        if (options === undefined || options === null) {
            options = new RequestOptions();
        }
        if (options.headers === undefined || options.headers === null) {
            options.headers = new Headers();
        }
        options.headers.append('Content-Type', 'application/json; charset=utf-8');
        //  options.headers.append('token', Global.getCookie('misite-token'));
        return options;
    }
    private composeUrl(url: string): string {
        let urlC: string = (simulated === true ? 'assets/mocks/' : this.global.apiUrl) + url;
        if (simulated === true) {
            if (urlC.indexOf('?') !== -1) {
                urlC = urlC.replace('?', '.json?decache=' + (Math.random() * 100).toString() + '&');
            }
            else
                urlC = urlC + '.json?decache=' + (Math.random() * 100).toString();
        }
        return urlC;
    }
}