Jens Geyer created THRIFT-6374:
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Summary: netstd tutorial server does not start with -tr:http
Key: THRIFT-6374
URL: https://issues.apache.org/jira/browse/THRIFT-6374
Project: Thrift
Issue Type: Bug
Components: Tutorial, netstd - Library
Affects Versions: 0.24.0
Reporter: Jens Geyer
{{Server \-tr:http}} in the netstd tutorial stops at startup, so none of the
HTTP samples can be run:
{noformat}
crit: Microsoft.AspNetCore.Hosting.Diagnostics[6]
Application startup exception
System.InvalidOperationException: Multiple constructors accepting all
given argument types have been found in type
'Thrift.Transport.Server.THttpServerTransport'. There should only be one
applicable constructor.
at
Microsoft.Extensions.DependencyInjection.ActivatorUtilities.TryFindMatchingConstructor(Type
instanceType, Type[] argumentTypes, ConstructorInfo& matchingConstructor,
Nullable`1[]& parameterMap)
at
Microsoft.Extensions.DependencyInjection.ActivatorUtilities.FindApplicableConstructor(Type
instanceType, Type[] argumentTypes, ConstructorInfoEx[] constructors,
ConstructorInfo& matchingConstructor, Nullable`1[]& matchingParameterMap)
at
Microsoft.Extensions.DependencyInjection.ActivatorUtilities.CreateInstance(IServiceProvider
provider, Type instanceType, Object[] parameters)
at
Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.ReflectionMiddlewareBinder.CreateMiddleware(RequestDelegate
next)
at Microsoft.AspNetCore.Builder.ApplicationBuilder.Build()
at
Microsoft.AspNetCore.Hosting.GenericWebHostService.StartAsync(CancellationToken
cancellationToken)
{noformat}
The tutorial adds the middleware with
{{app.UseMiddleware<THttpServerTransport>()}}
([Server/Program.cs:366|https://github.com/apache/thrift/blob/bcdf956895aeac5411ce3029ab8b33901b7c7a36/tutorial/netstd/Server/Program.cs#L366]).
The only argument the activator gets is the {{RequestDelegate}}, and all three
public {{THttpServerTransport}} constructors accept one, so it cannot choose.
Passing the processor and a configuration explicitly fixes it:
{code:java}
app.UseMiddleware<THttpServerTransport>(app.ApplicationServices.GetRequiredService<ITAsyncProcessor>(),
new TConfiguration());
{code}
With that line the server starts, and {{Client \-tr:http}} completes all its
calls.
Checked on master (bcdf956) with the .NET 10.0.401 SDK. The tutorial server and
{{THttpServerTransport}} are the same on master, release/0.25.0 and
release/0.24.0. No CI job builds or runs {{tutorial/netstd}}.
_Drafted with AI assistance (Claude Opus 5.5)._
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