.NET Core1.0.0-预览3-004056 MacOSX El Capitan - System.Net.Http.CurlException:无法解析主机名

Question

我正在运行一个HttpClient "Post“到一个Oauth2服务，以收回一个令牌。

var httpClient = new HttpClient(handler);

//HttpClient httpClient = new HttpClient();
httpClient.BaseAddress = tokenRequestBaseUri;

List<KeyValuePair<string, string>> nameValueCollection = new List<KeyValuePair<string, string>>();
nameValueCollection.Add(new KeyValuePair<string, string>("grant_type", "client_credentials"));

System.Net.Http.FormUrlEncodedContent formContent = new FormUrlEncodedContent(nameValueCollection);

HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, URIHelper.GetUAATokenRequestRelativeUri());

request.Content = formContent;

string clientId_clientSecret = Convert.ToBase64String(Encoding.UTF8.GetBytes(tenantInformation.ClientId_svcops + ":" + tenantInformation.ClientSecret_svcops));
request.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", clientId_clientSecret);

logger.Debug("Sending Http Request");

var httpResponseMessage = await httpClient.SendAsync(request);

代码在Windows 7上运行正常，但是MacOSX El Capitan上的相同代码会抛出异常：

System.AggregateException: One or more errors occurred. (An error occurred while sending the request.) ---> System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.Http.CurlException: Couldn't resolve host name
   at System.Net.Http.CurlHandler.ThrowIfCURLEError(CURLcode error)
   at System.Net.Http.CurlHandler.MultiAgent.FinishRequest(StrongToWeakReference`1 easyWrapper, CURLcode messageResult)

无法解析主机名

但是如果我打开浏览器，我就可以浏览那个Url了！

有什么帮助吗？

谢谢

Answer 1

使用VisualStudio2017 RC和.NET Core的预览3解决了这个问题。

它使Windows和MAC操作系统上的框架版本一致。