Stack Overflow Asked by Hans on December 14, 2020
I’m trying to setup a Web Server with Kestrel
in ASP.Net Core 3.1
to support HTTP/2
. So this is how I configure Kestrel:
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>();
});
}
}
And this is how I test it by making a request with prior HTTP/2
knowledge in a console application:
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();
}
}
}
Unfortunately, the caller program fails with this exception 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:UsersHanssourcereposConsoleApp17ConsoleApp17Program.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.
What am I missing here?
looks like there is an issue - https://github.com/dotnet/aspnetcore/issues/27536#issuecomment-731932924 I tried with Http1 worked ok
listenOptions.Protocols = HttpProtocols.Http1;
Answered by coder_b on December 14, 2020
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