HTTP/2 与 .Net Core 和 Kestrel

Question

我正在尝试在ASP.Net Core 3.1 中设置带有Kestrel 的Web 服务器以支持HTTP/2。所以这就是我配置 Kestrel 的方式：

public class Program
{
        public static void Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args)
        {
            return Microsoft.Extensions.Hosting.Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseKestrel(options =>
                {
                    options.ListenLocalhost(8080, listenOptions =>
                    {
                        listenOptions.Protocols = HttpProtocols.Http2;
                    });
                })
                .UseStartup<Startup>();
            });
        }
}

这就是我通过在控制台应用程序中使用先前的HTTP/2 知识发出请求来测试它的方式：

class Program
{
        static async Task Main(string[] args)
        {
            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);

            using var client = new HttpClient
            {
                BaseAddress = new Uri("http://localhost:8080"),
                DefaultRequestVersion = new Version(2, 0)
            };
            var req = new HttpRequestMessage(HttpMethod.Get, "/");
            var res = await client.SendAsync(req);
            var version = res.Version;
            Console.WriteLine(version);
            Console.ReadKey();
        }
    }
}

不幸的是，调用程序失败并出现此异常IOException: The response ended prematurely：

System.Net.Http.HttpRequestException
  HResult=0x80131620
  Message=An error occurred while sending the request.
  Source=System.Net.Http
  StackTrace:
   at System.Net.Http.HttpConnection.<SendAsyncCore>d__53.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at System.Net.Http.HttpConnectionPool.<SendWithNtConnectionAuthAsync>d__48.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at System.Net.Http.HttpConnectionPool.<SendWithRetryAsync>d__47.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at System.Net.Http.RedirectHandler.<SendAsync>d__4.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at System.Net.Http.HttpClient.<FinishSendAsyncBuffered>d__70.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at ConsoleApp17.Program.<Main>d__0.MoveNext() in C:\Users\Hans\source\repos\ConsoleApp17\ConsoleApp17\Program.cs:line 19

  This exception was originally thrown at this call stack:
    System.Net.Http.HttpConnection.FillAsync()
    System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task)
    System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)
    System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
    System.Net.Http.HttpConnection.ReadNextResponseHeaderLineAsync(bool)
    System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task)
    System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)
    System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(System.Threading.Tasks.Task)
    ...
    [Call Stack Truncated]

Inner Exception 1:
IOException: The response ended prematurely.

我在这里错过了什么？

Answer 1

看起来有问题 - https://github.com/dotnet/aspnetcore/issues/27536#issuecomment-731932924 我试过 Http1 工作正常

listenOptions.Protocols = HttpProtocols.Http1;