尝试使用Google Places API获取城市列表

Question

我正在尝试使用Google商家信息图API来获取要显示的城市列表。我试图使用自动完成功能来获取我可以解析的JSON。但我收到以下错误：

Failed to load 
https://maps.googleapis.com/maps/api/place/autocomplete/json?
input=New&types=(cities)&key=AIzaSyBVgF-ywjsdsWx6JMZNR0UlUL8q67wM5m8: 
No 'Access-Control-Allow-Origin' header is present on the requested 
resource. Origin 'http://localhost:4200' is therefore not allowed 
access.

我有以下作为我的API请求：

searchCities(searchTerm: String) {
  const url = 
       'https://maps.googleapis.com/maps/api/place/autocomplete/json?
       input=' + searchTerm +
       '&types=(cities)&key=AIzaSyBVgF-ywjsdsWx6JMZNR0UlUL8q67wM5m8';
return this.http.get(url)
  .map((response: Response) => {
    return response.json();
  });
}

我该如何解决这个问题？