HTTP wrapper for Angular 4

import {Injectable} from '@angular/core';
import {Http, Headers, Response, Request, BaseRequestOptions, RequestMethod, ResponseContentType} from '@angular/http';
import {Observable} from 'rxjs/Rx';

@Injectable()
export class HttpClient {
  constructor(private http: Http) {}

  post(url: string, body: any = {}) {
    return this.request(url, RequestMethod.Post, body);
  }

  get(url: string) {
    return this.request(url, RequestMethod.Get);
  }

  put(url: string, body: any) {
    return this.request(url, RequestMethod.Put, body);
  }

  postAndGetBlob(url: string, body: any = {}) {
    return this.request(url, RequestMethod.Post, body, true);
  }

  private request(url: string, method: RequestMethod, body?: any, isBlob = false): Observable<Response> {

    const options = new BaseRequestOptions();
    options.url = url;
    options.method = method;
    options.body = body;
    if(isBlob) {
      options.responseType = ResponseContentType.Blob;
    }
    const request = new Request(options);
    return this.http.request(request)
      .catch((error: any) => this.onErrorHandler(error));
  }

}