C#HttpClient和Windows身份验证: Cannot access a closed Stream

我正在使用带有处理程序的 native C#HTTP客户端来处理Windows身份验证，并且我使用ObjectDisposedException。

using (var httpClientHandler = new HttpClientHandler { Credentials = CredentialCache.DefaultNetworkCredentials })
{
    bool disposeHandler = true; //Setting true or false does not fix the problem
    using (var httpClient = new HttpClient(httpClientHandler, disposeHandler))
    {
        using (var content = new ByteArrayContent(Encoding.UTF8.GetBytes("Hello")))
        {
            // Commenting/uncommenting the line below does not fix the problem
            // httpRequestMessage.Headers.Connection.Add("Keep-Alive");

            using (var httpResponseMessage = await httpClient.PostAsync("http://SomeUrl", content)) // This line throws an ObjectDisposedException
            {

            }
        }
    }
}

任何想法？

最佳答案

经过一些新的调查，我认为/担心在HttpClientHandler(或HttpClient)中存在一个 Microsoft错误:

如果我不是使用PostAsync方法而是使用SendAsync方法，则可以为我的请求添加更多选项，尤其是将 HTTP版本从 1.1 (默认)更改为 1.0 。然后在这种情况下，真正的异常就被揭示了(它不再被ObjectDisposedException异常隐藏/覆盖)。供您引用，我真正的异常(exception)是:

-> System.Net.WebException:远程服务器返回错误:(401)未经授权。

-> System.ComponentModel.Win32Exception:目标主体名称不正确

(仅供引用，此异常是由于Active Directory中用户的SPN配置错误所致)

using (var httpClientHandler = new HttpClientHandler { Credentials = CredentialCache.DefaultNetworkCredentials })
{
    bool disposeHandler = true; //Setting true or false does not fix the problem
    using (var httpClient = new HttpClient(httpClientHandler, disposeHandler))
    {
        using (var content = new ByteArrayContent(Encoding.UTF8.GetBytes("Hello")))
        {
            // Commenting/uncommenting the line below does not fix the problem
            // httpRequestMessage.Headers.Connection.Add("Keep-Alive");

            var httpRequestMessage = new HttpRequestMessage(HttpMethod.Post, "http://SomeUrl")
            {
                Content = content,
                Version = HttpVersion.Version10
            };

            using (var httpResponseMessage = await httpClient.SendAsync(httpRequestMessage)) // This line still throws but with the real exception (and not the ObjectDisposedException)
            {

            }
        }
    }
}

当心:降级HTTP版本只是获得真正异常消息的一种手段，HTTP 1.0变得很老。

任何专家的分析将不胜感激。希望这对其他人有帮助。

关于C#HttpClient和Windows身份验证: Cannot access a closed Stream，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/55611139/