Example (protobuf-net#121)

examples/pb-net-grpc/Server_CS/FakeAuthenticationHandler.cs

@@ -0,0 +1,33 @@
+using System.Security.Claims;
+using System.Text.Encodings.Web;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+
+namespace Server_CS
+{
+    class FakeAuthHandler : AuthenticationHandler<FakeAuthenticationSchemeOptions>
+    {
+        public const string SchemeName = "Fake";
+
+        public FakeAuthHandler(
+        IOptionsMonitor<FakeAuthenticationSchemeOptions> options,
+        ILoggerFactory logger,
+        UrlEncoder encoder,
+        ISystemClock clock)
+        : base(options, logger, encoder, clock)
+        {
+        }
+
+        protected override Task<AuthenticateResult> HandleAuthenticateAsync()
+        {
+            var claimsIdentity = new ClaimsIdentity(SchemeName);
+            var ticket = new AuthenticationTicket(new ClaimsPrincipal(claimsIdentity), Scheme.Name);
+            return Task.FromResult(AuthenticateResult.Success(ticket));
+        }
+    }
+
+    class FakeAuthenticationSchemeOptions : AuthenticationSchemeOptions
+    { }
+}

examples/pb-net-grpc/Server_CS/ServiceBinderWithServiceResolutionFromServiceCollection.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using Microsoft.Extensions.DependencyInjection;
+using ProtoBuf.Grpc.Configuration;
+
+namespace Server_CS
+{
+    internal class ServiceBinderWithServiceResolutionFromServiceCollection : ServiceBinder
+    {
+        private readonly IServiceCollection services;
+
+        public ServiceBinderWithServiceResolutionFromServiceCollection(IServiceCollection services)
+        {
+            this.services = services;
+        }
+
+        public override IList<object> GetMetadata(MethodInfo method, Type contractType, Type serviceType)
+        {
+            var resolvedServiceType = serviceType;
+            if (serviceType.IsInterface)
+                resolvedServiceType = services.SingleOrDefault(x => x.ServiceType == serviceType)?.ImplementationType ?? serviceType;
+
+            return base.GetMetadata(method, contractType, resolvedServiceType);
+        }
+    }
+}

examples/pb-net-grpc/Server_CS/Startup.cs

@@ -15,10 +15,15 @@ public void ConfigureServices(IServiceCollection services)
             services.AddCodeFirstGrpc(config =>
             {
                 config.ResponseCompressionLevel = System.IO.Compression.CompressionLevel.Optimal;
-            });
+            })
+            .WithBinderConfiguration(config => config.ServiceBinder = new ServiceBinderWithServiceResolutionFromServiceCollection(services));
             services.AddCodeFirstGrpcReflection();
 
-            services.AddAuthentication();
+            services.AddAuthentication(options =>
+            {
+                options.AddScheme<FakeAuthHandler>(FakeAuthHandler.SchemeName, FakeAuthHandler.SchemeName);
+                options.DefaultScheme = FakeAuthHandler.SchemeName;
+            });
             services.AddAuthorization();
             services.AddSingleton<ICounter, MyCounter>();
         }