Minor improvements to grpc-dotnet

dotnet_grpc_bench/GreeterServer/ServiceProvidersMiddleware.cs

@@ -0,0 +1,54 @@
+#region Copyright notice and license
+
+// Copyright 2019 The gRPC Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#endregion
+
+using System;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Http.Features;
+
+namespace GreeterServer
+{
+    public class ServiceProvidersMiddleware
+    {
+        private readonly ServiceProvidersFeature _serviceProvidersFeature;
+        private readonly RequestDelegate _next;
+
+        public ServiceProvidersMiddleware(RequestDelegate next, IServiceProvider serviceProvider)
+        {
+            _serviceProvidersFeature = new ServiceProvidersFeature(serviceProvider);
+            _next = next;
+        }
+
+        public Task InvokeAsync(HttpContext context)
+        {
+            // Configure request to use application services to avoid creating a request scope
+            context.Features.Set<IServiceProvidersFeature>(_serviceProvidersFeature);
+            return _next(context);
+        }
+
+        private class ServiceProvidersFeature : IServiceProvidersFeature
+        {
+            public ServiceProvidersFeature(IServiceProvider requestServices)
+            {
+                RequestServices = requestServices;
+            }
+
+            public IServiceProvider RequestServices { get; set; }
+        }
+    }
+}

dotnet_grpc_bench/GreeterServer/Startup.cs

@@ -19,6 +19,7 @@
 using System;
 using GreeterServer.Services;
 using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Routing;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 
@@ -29,6 +30,8 @@ public class Startup
         public void ConfigureServices(IServiceCollection services)
         {
             services.AddGrpc(o => o.IgnoreUnknownServices = true);
+            services.Configure<RouteOptions>(c => c.SuppressCheckForUnhandledSecurityMetadata = true);
+            services.AddSingleton<GreeterService>();
         }
 
         public void Configure(IApplicationBuilder app, IHostApplicationLifetime applicationLifetime)
@@ -37,6 +40,8 @@ public void Configure(IApplicationBuilder app, IHostApplicationLifetime applicat
 
             app.UseRouting();
 
+            app.UseMiddleware<ServiceProvidersMiddleware>();
+
             app.UseEndpoints(endpoints =>
             {
                 endpoints.MapGrpcService<GreeterService>();