在 .net core 中使用 HttpClient/HttpClientFactory 时出现问题-解网

问：

我们已实现在 .NET Core 中使用第三方调用。但是，我们仍然收到以下错误。IHttpClientFactoryHttpClient

System.IO.IOException：无法从传输连接读取数据：由于线程退出或应用程序请求，I/O 操作已中止。

System.Net.Sockets.SocketException （995）：由于线程退出或应用程序请求，I/O 操作已中止

System.Net.Http.HttpRequestException：发送请求时出错。---> System.IO.IOException：响应过早结束

这是我们配置事物的代码：

启动 .cs

builder.Services
       .AddHttpClient<IRequestHandler, RequestHandler>()
       .SetHandlerLifetime(TimeSpan.FromMinutes(5))
       .ConfigurePrimaryHttpMessageHandler(_ => new HttpClientHandler
       {
           SslProtocols = SslProtocols.Tls12 | SslProtocols.Tls13
       })
       .AddPolicyHandler(retryPolicyHttp);

services.AddTransient<IRequestHandler, RequestHandler>();

请求处理程序 .cs

public class RequestHandler: IRequestHandler
{
    private readonly IHttpClientFactory _httpClientFactory;

    public RequestHandler(IHttpClientFactory httpClientFactory)
    {
        _httpClientFactory = httpClientFactory;
    }

    public virtual HttpResponseMessage ExecuteThirdPartyServices(HttpMethod httpMethod, string 
                           postData, RequestModel requestModel)
    {
        using HttpRequestMessage request = new(httpMethod, requestModel.RequestUri);
        
        HttpResponseMessage httpMessageResponse;

        using (var httpClient = _httpClientFactory.CreateClient())
        {
            httpClient.Timeout = TimeSpan.FromMinutes(5);
            httpMessageResponse = httpClient.SendAsync(request).Result;
        }

        return httpMessageResponse;
    }
}

我已经尝试了各种选项来解决这些错误，但我们仍然无法传递这些错误，并且我们不断收到这些错误。

对此的任何帮助都是值得赞赏的！

C# ASP.NET-Core dotnet-httpclient httpclientfactory sendasync

首先关于你的启动.cs。您对同一服务有两个注册，并且 .第二个是正在使用的那个，如果你尝试注入一个 .这意味着您的SSL设置未被使用，并且可能是错误的原因。.AddHttpClient<IRequestHandler, RequestHandler>().AddTransient<IRequestHandler, RequestHandler>();IRequestHandler

我建议您删除第二个注册并使用第一个注册。我也怀疑你需要这个，并建议你应该删除它。SetHandlerLifetime

而不是你的代码中有阻塞。一般来说，你永远不应该一直使用或做异步，但如果你真的想要一个阻塞电话，你最好这样做，看看Stephen Cleary关于这个问题的著作，他应该是你所有异步事情的首选指南。.Result.Result.Wait()GetAwaiter().GetResult()

// Startup.cs

services
    .AddHttpClient<IRequestHandler, RequestHandler>(httpClient =>
    {  
        httpClient.Timeout = TimeSpan.FromMinutes(5);
    })
    .ConfigurePrimaryHttpMessageHandler(_ =>
        new HttpClientHandler
        {
            SslProtocols = SslProtocols.Tls12 | SslProtocols.Tls13
        })
    .AddPolicyHandler(retryPolicyHttp);

// RequestHandler.cs

public class RequestHandler: IRequestHandler
{
    private readonly HttpClient _httpClient;

    public RequestHandler(HttpClient httpClient)
    {
        _httpClient = httpClient;
    }

    public virtual HttpResponseMessage ExecuteThirdPartyServices(
        HttpMethod httpMethod,
        string postData,
        RequestModel requestModel)
    {
        using HttpRequestMessage request = new(httpMethod, requestModel.RequestUri);
        
        return _httpClient.SendAsync(request).GetAwaiter().GetResult();
    }
}

在 .net core 中使用 HttpClient/HttpClientFactory 时出现问题

Getting issue while using HttpClient/HttpClientFactory in .net core

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