Blazor 网站卡在加载屏幕上，无法进行异步调用

我有一个服务器端Blazor Webapp，带有一个异步REST请求。我在请求过程中使用加载屏幕，该屏幕运行良好，在本地计算机上没有任何问题，但在在线应用程序上，当我多次发出相同的请求时，它有时会在加载过程中卡住。我不知道这是什么问题

代码如下：

private async Task MakeRequest(ChangeEventArgs e)
{
    if (e.Value != null)
    {
        AppState.IsBusy = true;

        List.Clear();

        foreach (var type in GetTypes())
        {
            var (result, error) = await Utility.GetDataAsync(e.Value, type);
            if (error.HasValue)
            {
                AppState.ErrorShow = true;
                break;
            }
            else
            {
                List.AddRange(result);
            }
        }

        AppState.IsBusy = false;
    }
}

AppState

是一个作用域服务，用于保存应用程序的状态。如果

IsBusy

更改，我将调用

NotifyStateChanged（）

，调用页面上的

StateHasChanged（）

Utility.GetDataAsync（）

是进行重新请求并解析结果的方法：

public static async Task<(List<string>, Error?)> GetModelle(string buildYear, string brand, string type)
{
    Error? error = null;

    var client = new RestClient("");
    var request = new RestRequest("", Method.GET);
    var response = await client.ExecuteAsync(request);

    using (JsonDocument document = JsonDocument.Parse(response.Content))
    {
        try
        {
            .. parse result ...
        }
        catch (Exception ex)
        {
            error = new Error();
        }
    }

    return (list, error);
}

接

Time    6:35:28 PM
Duration    2.24 sec
Outgoing Command    GET /commons-dispatcher/services/eurotax/domain
Result code Faulted
AspNetCoreEnvironment   Production
Error   Received an invalid status code: 'Con'.
_MS.ProcessedByMetricExtractors (Name:'Dependencies', Ver:'1.1')
#########/commons-dispatcher/services/eurotax/domain?&domainType=vehicleBrand&buildYear=2011&propertyType=KFZP10

---

这里的问题是什么？

看起来像是“连接被拒绝”，在某个地方它被削减为“con”。是的，我认为你是对的，错误消息应该是“连接被拒绝”。我尝试了我能想到的一切，我的猜测是，我向其发出请求的服务器激活了一个安全功能，当我打几个电话时，该功能会阻止我一段时间。我就这个问题联系了另一方，希望他们能自己解决。try/catch的工作原理是，我的网站不会被卡住，但我在一段时间内无法再提出进一步的请求。所以，我想我在这里做不了什么。我得到了服务运营商的回复，他说该服务仅供内部使用（哎哟

Time    6:35:28 PM
Exception type  System.Net.Http.HttpRequestException
Exception message   Received an invalid status code: 'Con'.
AspNetCoreEnvironment   Production
System.Net.Http.HttpRequestException: Received an invalid status code: 'Con'.
   at System.Net.Http.HttpConnection.ParseStatusLine(Span`1 line, HttpResponseMessage response)
   at System.Net.Http.HttpConnection.SendAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.SendWithNtConnectionAuthAsync(HttpConnection connection, HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken)
   at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.DecompressionHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.DiagnosticsHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)

Time    6:35:28 PM
Duration    2.24 sec
Outgoing Command    GET /commons-dispatcher/services/eurotax/domain
Result code Faulted
AspNetCoreEnvironment   Production
Error   Received an invalid status code: 'Con'.
_MS.ProcessedByMetricExtractors (Name:'Dependencies', Ver:'1.1')
#########/commons-dispatcher/services/eurotax/domain?&domainType=vehicleBrand&buildYear=2011&propertyType=KFZP10