Cookies Windows.Web.HttpClient:将不发送Cookie

我向主机的登录端点发送带有基本身份验证的HTTP Get请求：

            request = new HttpRequestMessage();
            // Configuration Item: Login URL Suffix
            request.RequestUri = new Uri(string.Format("https://{0}/{1}", Host, loginSuffix));
            request.Method = Windows.Web.Http.HttpMethod.Get;

            var info = User + ":" + Password;
            var token = Convert.ToBase64String(Encoding.UTF8.GetBytes(info));
            request.Headers.Authorization = new HttpCredentialsHeaderValue("Basic", token);

            _httpClient = CreateHttpClient(ref cookieManager);
            response = await _httpClient.SendRequestAsync(request, HttpCompletionOption.ResponseContentRead);

            response.EnsureSuccessStatusCode();

            responseBodyAsText = await response.Content.ReadAsStringAsync();

HttpClient是使用筛选器创建的，以便稍后设置cookie：

    private HttpClient CreateHttpClient(ref HttpCookieManager _cookieManager)
    {
        HttpBaseProtocolFilter _filter = new HttpBaseProtocolFilter();

        HttpClient _httpClient = new Windows.Web.Http.HttpClient(_filter);

        _cookieManager = _filter.CookieManager;

        return _httpClient;
    }

从响应中可以读取SET-COOKIE头

        string[] Queries;
        response.Headers.TryGetValue("Set-Cookie", out tmpString);
        if (tmpString != null)
            Queries = tmpString.Split(new string[] { ";" }, StringSplitOptions.RemoveEmptyEntries);

我正在寻找一个具有定义名称（CookieKeyName）的Cookie，该名称将在下一个请求中设置

        foreach (var query in Queries)
        {
            if (query.Contains(CookieKeyName))
            {
                staticCookieKey = query.Substring(0, query.IndexOf("="));
                staticCookieValue = query.Substring(query.IndexOf("=") + 1);
            }
        }

我预计，HttpClient将在对该URL的响应中使用接收到的集合Cookie，作为每个后续请求中的Cookie自动使用

我正在准备下一个请求并自己设置Cookie：

            request.RequestUri = new Uri(string.Format("https://{0}/qcbin", Host));
            request.Method = Windows.Web.Http.HttpMethod.Get;

            HttpCookie _cookie = new Windows.Web.Http.HttpCookie(staticCookieKey, Host, "/");
            _cookie.Value = staticCookieValue;
            bool replaced = cookieManager.SetCookie(_cookie);

以下请求的发送提供给Web异常401，因为服务器期望此URL与之前收到的响应Cookie中的URL相同

            response = await _httpClient.SendRequestAsync(request, HttpCompletionOption.ResponseContentRead);

            response.EnsureSuccessStatusCode();

            responseBodyAsText = await response.Content.ReadAsStringAsync();

第二个请求不包含Cookie头。即使在CookieManager中设置Cookie，也没有在HttpClient的第一个响应中继续设置Cookie i

提示：Cookie值的长度约为6000个字符（来自IBM Data Power）

事先谢谢你的帮助