我正在尝试在 Dart 中构建一个小型 Web 应用程序。该应用程序调用 EasyPost Web 服务,如下 curl 调用所示:
$ curl -X POST https://myuserid@api.easypost.com/v2/trackers
-d 'tracker[tracking_code]=EZ1000000001'
-d 'tracker[carrier]=FEDEX'
这是我尝试匹配此请求的 Dart 代码:
// Configuration parameters
var url = "https://myuserid@api.easypost.com/v2/trackers";
var data = {
'tracker[tracking_code]': '$packageNo',
'tracker[carrier]': 'FEDEX'
};
// Make the request
var request = new HttpRequest();
request
..open("POST", url, async: true)
..withCredentials = true
..onLoadEnd.listen((_) => print(request.responseText))
..send(data.toString());
当我在 WebStorm 中运行此代码时,在发出 CORS 错误的请求时代码失败:
POST https://api.easypost.com/v2/trackers 401 (Unauthorized)
XMLHttpRequest cannot load https://api.easypost.com/v2/trackers.
No 'Access-Control-Allow-Origin' header is present on the requested
resource. Origin 'http://localhost:63342' is therefore not allowed
access. The response had HTTP status code 401.
不是应该自动处理吗?还是我需要自己将这些标头添加到请求中?