Wrap Angular 2 http service with custom headers

http-service.ts

import { Injectable}  from '@angular/core';
import { Http, Headers, Response } from '@angular/http';
import { XCSRF } from './../services/tokens'

@Injectable()
export class HttpClient {
  constructor(http: Http) {
    this._http = http;
  }
  private _http: Http;
  private createAuthorizationHeader(headers:Headers) {
		let token = XCSRF.toString().replace('Token ', '');
		headers.append('Accept', 'application/json');
		headers.append('X-Csrf-Token', token);
  }

  get(url) {
    let headers = new Headers();
    this.createAuthorizationHeader(headers);
    return this._http.get(url, {
      headers: headers
    });
  }

  post(url, data) {
    let headers = new Headers();
    this.createAuthorizationHeader(headers);
    return this._http.post(url, data, {
      headers: headers
    });
  }
}