Managed gRPC client

Directory.Build.props

@@ -9,6 +9,9 @@
 
     <!-- Don't make missing XML docs a fatal build error, but still surface so we have visibility into undocumented APIs. -->
     <WarningsNotAsErrors>$(WarningsNotAsErrors);CS1591</WarningsNotAsErrors>
+
+    <!-- static local methods are a C# 8.0 feature -->
+    <LangVersion>preview</LangVersion>
   </PropertyGroup>
 
 </Project>

Grpc.AspNetCore.sln

@@ -56,11 +56,18 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "testassets", "testassets",
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Proto", "Proto", "{BF1393D4-6099-4EF9-85BB-7EE6CBEB920C}"
 	ProjectSection(SolutionItems) = preProject
+		testassets\Proto\authorize.proto = testassets\Proto\authorize.proto
 		testassets\Proto\chat.proto = testassets\Proto\chat.proto
 		testassets\Proto\compression.proto = testassets\Proto\compression.proto
 		testassets\Proto\count.proto = testassets\Proto\count.proto
+		testassets\Proto\empty.proto = testassets\Proto\empty.proto
 		testassets\Proto\greet.proto = testassets\Proto\greet.proto
+		testassets\Proto\lifetime.proto = testassets\Proto\lifetime.proto
 		testassets\Proto\message.proto = testassets\Proto\message.proto
+		testassets\Proto\messages.proto = testassets\Proto\messages.proto
+		testassets\Proto\nested.proto = testassets\Proto\nested.proto
+		testassets\Proto\singleton.proto = testassets\Proto\singleton.proto
+		testassets\Proto\test.proto = testassets\Proto\test.proto
 	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FunctionalTestsWebsite", "testassets\FunctionalTestsWebsite\FunctionalTestsWebsite.csproj", "{7B95289B-4992-4C0D-B26F-8EC58F81FC96}"
@@ -110,6 +117,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.AspNetCore.Server.Refl
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Reflector", "examples\Clients\Reflector\Reflector.csproj", "{86AD33E9-2C07-45BD-B599-420C2618188D}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "InteropTestsClient", "testassets\InteropTestsClient\InteropTestsClient.csproj", "{291E5BA5-608D-406D-A2DB-389412D907F3}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Grpc.NetCore.HttpClient.Tests", "test\Grpc.NetCore.HttpClient.Tests\Grpc.NetCore.HttpClient.Tests.csproj", "{2D26FB7A-72AD-41B9-9B06-44F50A8F8A49}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -188,6 +199,14 @@ Global
 		{86AD33E9-2C07-45BD-B599-420C2618188D}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{86AD33E9-2C07-45BD-B599-420C2618188D}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{86AD33E9-2C07-45BD-B599-420C2618188D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{2D26FB7A-72AD-41B9-9B06-44F50A8F8A49}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2D26FB7A-72AD-41B9-9B06-44F50A8F8A49}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2D26FB7A-72AD-41B9-9B06-44F50A8F8A49}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{2D26FB7A-72AD-41B9-9B06-44F50A8F8A49}.Release|Any CPU.Build.0 = Release|Any CPU
+		{291E5BA5-608D-406D-A2DB-389412D907F3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{291E5BA5-608D-406D-A2DB-389412D907F3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{291E5BA5-608D-406D-A2DB-389412D907F3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{291E5BA5-608D-406D-A2DB-389412D907F3}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -221,6 +240,8 @@ Global
 		{39320CA8-D8F0-45B6-B704-A04C16870226} = {310E5783-455A-4D09-A7AE-39DC2AB09504}
 		{55813F20-1269-4B19-B03E-7E4A90148F92} = {8C62055F-8CD7-4859-9001-634D544DF2AE}
 		{86AD33E9-2C07-45BD-B599-420C2618188D} = {F6E0F9D7-64E5-4C7B-A9BC-3C2AD687710B}
+		{2D26FB7A-72AD-41B9-9B06-44F50A8F8A49} = {CECC4AE8-9C4E-4727-939B-517CC2E58D65}
+		{291E5BA5-608D-406D-A2DB-389412D907F3} = {59C7B1F0-EE4D-4098-8596-0ADDBC305234}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {CD5C2B19-49B4-480A-990C-36D98A719B07}

build/dependencies.props

@@ -1,6 +1,7 @@
 <Project>
   <PropertyGroup>
     <BenchmarkDotNetPackageVersion>0.11.3</BenchmarkDotNetPackageVersion>
+    <ConfigureAwaitCheckerAnalyzerPackageVersion>3.0.0</ConfigureAwaitCheckerAnalyzerPackageVersion>
     <GoogleProtobufPackageVersion>3.7.0</GoogleProtobufPackageVersion>
     <GrpcCorePackageVersion>1.20.0-pre3</GrpcCorePackageVersion>
     <GrpcCoreApiPackageVersion>1.20.0-pre3</GrpcCoreApiPackageVersion>
@@ -12,7 +13,7 @@
     <MicrosoftNETTestSdkPackageVersion>16.0.0-preview-20181205-02</MicrosoftNETTestSdkPackageVersion>
     <MicrosoftSourceLinkGitHubPackageVersion>1.0.0-beta2-18618-05</MicrosoftSourceLinkGitHubPackageVersion>
     <MoqPackageVersion>4.10.0</MoqPackageVersion>
-    <NewtonsoftJsonPackageVersion>12.0.1</NewtonsoftJsonPackageVersion>
+    <NewtonsoftJsonPackageVersion>12.0.2</NewtonsoftJsonPackageVersion>
     <NunitPackageVersion>3.11.0</NunitPackageVersion>
     <Nunit3TestAdapterPackageVersion>3.12.0</Nunit3TestAdapterPackageVersion>
     <SystemIOPipelinesPackageVersion>4.6.0-preview.19073.11</SystemIOPipelinesPackageVersion>

build/sources.props

@@ -4,6 +4,7 @@
       $(RestoreSources);
       https://api.nuget.org/v3/index.json;
       https://dotnet.myget.org/F/aspnetcore-dev/api/v3/index.json;
+      https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json;
     </RestoreSources>
     <RestoreSources Condition="Exists('$(MSBuildThisFileDirectory)feed')">
       $(RestoreSources);

examples/Clients/Counter/Counter.csproj

@@ -3,7 +3,6 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp3.0</TargetFramework>
-    <LangVersion>latest</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>
@@ -22,4 +21,5 @@
     <PackageReference Include="Grpc.Core" Version="$(GrpcCorePackageVersion)" />
     <PackageReference Include="Grpc.Tools" Version="$(GrpcToolsPackageVersion)" PrivateAssets="All" />
   </ItemGroup>
+
 </Project>

examples/Clients/Counter/Program.cs

@@ -17,6 +17,7 @@
 #endregion
 
 using System;
+using System.IO;
 using System.Runtime.InteropServices;
 using System.Threading.Tasks;
 using Common;
@@ -36,9 +37,24 @@ static async Task Main(string[] args)
             var channel = new Channel("localhost:50051", credentials);
             var client = new Counter.CounterClient(channel);
 
-            var reply = client.IncrementCount(new Google.Protobuf.WellKnownTypes.Empty());
+            await UnaryCallExample(client);
+
+            await ClientStreamingCallExample(client);
+
+            Console.WriteLine("Shutting down");
+            await channel.ShutdownAsync();
+            Console.WriteLine("Press any key to exit...");
+            Console.ReadKey();
+        }
+
+        private static async Task UnaryCallExample(Counter.CounterClient client)
+        {
+            var reply = await client.IncrementCountAsync(new Google.Protobuf.WellKnownTypes.Empty());
             Console.WriteLine("Count: " + reply.Count);
+        }
 
+        private static async Task ClientStreamingCallExample(Counter.CounterClient client)
+        {
             using (var call = client.AccumulateCount())
             {
                 for (int i = 0; i < 3; i++)
@@ -50,13 +66,10 @@ static async Task Main(string[] args)
                 }
 
                 await call.RequestStream.CompleteAsync();
-                Console.WriteLine($"Count: {(await call.ResponseAsync).Count}");
-            }
 
-            Console.WriteLine("Shutting down");
-            await channel.ShutdownAsync();
-            Console.WriteLine("Press any key to exit...");
-            Console.ReadKey();
+                var response = await call;
+                Console.WriteLine($"Count: {response.Count}");
+            }
         }
     }
 }

examples/Clients/Greeter/Greeter.csproj

@@ -3,7 +3,6 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp3.0</TargetFramework>
-    <LangVersion>latest</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>
@@ -22,4 +21,5 @@
     <PackageReference Include="Grpc.Core" Version="$(GrpcCorePackageVersion)" />
     <PackageReference Include="Grpc.Tools" Version="$(GrpcToolsPackageVersion)" PrivateAssets="All" />
   </ItemGroup>
+
 </Project>

examples/Clients/Mailer/Mailer.csproj

@@ -3,7 +3,6 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp3.0</TargetFramework>
-    <LangVersion>latest</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>

examples/Clients/Mailer/Program.cs

@@ -43,7 +43,7 @@ static async Task Main(string[] args)
             await channel.ConnectAsync();
 
             Console.WriteLine("Connected");
-            Console.WriteLine("Press escape to exit. Press any other key to forward mail.");
+            Console.WriteLine("Press escape to disconnect. Press any other key to forward mail.");
 
             var client = new Mailer.MailerClient(channel);
             using (var mailbox = client.Mailbox(headers: new Metadata { new Metadata.Entry("mailbox-name", mailboxName) }))
@@ -78,6 +78,9 @@ static async Task Main(string[] args)
 
             Console.WriteLine("Disconnecting");
             await channel.ShutdownAsync();
+
+            Console.WriteLine("Disconnected. Press any key to exit.");
+            Console.ReadKey();
         }
 
         private static string GetMailboxName(string[] args)

examples/Clients/Reflector/Reflector.csproj

@@ -3,7 +3,6 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp3.0</TargetFramework>
-    <LangVersion>latest</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>

examples/Server/Services/Greeter.cs

@@ -34,9 +34,6 @@ public GreeterService(ILoggerFactory loggerFactory)
     //Server side handler of the SayHello RPC
     public override Task<HelloReply> SayHello(HelloRequest request, ServerCallContext context)
     {
-        var httpContext = context.GetHttpContext();
-        _logger.LogInformation($"Connection id: {httpContext.Connection.Id}");
-
         _logger.LogInformation($"Sending hello to {request.Name}");
         return Task.FromResult(new HelloReply { Message = "Hello " + request.Name });
     }

global.json

@@ -1,5 +1,5 @@
 {
   "sdk": {
-    "version": "3.0.100-preview4-011108"
+    "version": "3.0.100-preview6-011568"
   }
 }

perf/benchmarkapps/BenchmarkClient/BenchmarkClient.csproj

@@ -3,7 +3,6 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp3.0</TargetFramework>
-    <LangVersion>latest</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>

perf/benchmarkapps/BenchmarkServer/BenchmarkServer.csproj

@@ -4,7 +4,6 @@
     <TargetFramework>netcoreapp3.0</TargetFramework>
     <TargetFramework Condition="'$(BenchmarksTargetFramework)' != ''">$(BenchmarksTargetFramework)</TargetFramework>
     <OutputType>Exe</OutputType>
-    <LangVersion>latest</LangVersion>
 
     <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
     <!-- Uncomment line below to automatically compile .proto files in the project directory -->
@@ -35,5 +34,6 @@
 
     <PackageReference Include="Google.Protobuf" Version="$(GoogleProtobufPackageVersion)" />
     <PackageReference Include="Grpc.Tools" Version="$(GrpcToolsPackageVersion)" PrivateAssets="All" />
+    <PackageReference Include="Newtonsoft.Json" Version="$(NewtonsoftJsonPackageVersion)" />
   </ItemGroup>
 </Project>

src/Grpc.AspNetCore.Server/Internal/GrpcProtocolHelpers.cs

@@ -205,7 +205,7 @@ public static void SetStatusTrailers(HttpResponse response, Status status)
         {
             // Use SetTrailer here because we want to overwrite any that was set earlier
             SetTrailer(response, GrpcProtocolConstants.StatusTrailer, status.StatusCode.ToTrailerString());
-            SetTrailer(response, GrpcProtocolConstants.MessageTrailer, status.Detail);
+            SetTrailer(response, GrpcProtocolConstants.MessageTrailer, !string.IsNullOrEmpty(status.Detail) ? status.Detail : null);
         }
 
         private static void SetTrailer(HttpResponse response, string trailerName, StringValues trailerValues)

src/Grpc.NetCore.HttpClient/Grpc.NetCore.HttpClient.csproj

@@ -12,15 +12,18 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <!-- TODO(JamesNK): Potentially change to netstandard2.1 https://github.com/dotnet/standard/issues/1144 -->
+    <TargetFramework>netcoreapp3.0</TargetFramework>
     <LangVersion>8.0</LangVersion>
     <GenerateBindingRedirectsOutputType>true</GenerateBindingRedirectsOutputType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
   </PropertyGroup>
 
   <ItemGroup>
+    <!-- Roslyn analyzer that enforces ConfigureAwait(false) -->
+    <PackageReference Include="ConfigureAwaitChecker.Analyzer" Version="$(ConfigureAwaitCheckerAnalyzerPackageVersion)" PrivateAssets="All" />
+
     <PackageReference Include="Grpc.Core" Version="$(GrpcCorePackageVersion)" />
-    <PackageReference Include="System.IO.Pipelines" Version="$(SystemIOPipelinesPackageVersion)" />
   </ItemGroup>
 
 </Project>

src/Grpc.NetCore.HttpClient/GrpcClientFactory.cs

@@ -42,14 +42,37 @@ public static TClient Create<TClient>(string baseAddress, X509Certificate certif
             // Needs to be set before creating the HttpClientHandler
             AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2Support", true);
 
-            var handler = new HttpClientHandler();
-            handler.ServerCertificateCustomValidationCallback = (httpRequestMessage, cert, cetChain, policyErrors) => true;
+            var httpClientHandler = new HttpClientHandler();
+            httpClientHandler.ServerCertificateCustomValidationCallback = (httpRequestMessage, cert, cetChain, policyErrors) => true;
             if (certificate != null)
             {
-                handler.ClientCertificates.Add(certificate);
+                httpClientHandler.ClientCertificates.Add(certificate);
             }
 
-            return Cache<TClient>.Instance.Activator(new HttpClientCallInvoker(handler, new Uri(baseAddress, UriKind.RelativeOrAbsolute)));
+            return CreateCore<TClient>(baseAddress, httpClientHandler);
+        }
+
+        /// <summary>
+        /// Creates a gRPC client using the specified address and handler.
+        /// </summary>
+        /// <typeparam name="TClient">The type of the gRPC client. This type will typically be defined using generated code from a *.proto file.</typeparam>
+        /// <param name="baseAddress">The base address to use when making gRPC requests.</param>
+        /// <param name="httpClientHandler">The <see cref="HttpClientHandler"/>.</param>
+        /// <returns>A gRPC client.</returns>
+        public static TClient Create<TClient>(string baseAddress, HttpClientHandler httpClientHandler) where TClient : ClientBase<TClient>
+        {
+            return CreateCore<TClient>(baseAddress, httpClientHandler);
+        }
+
+        private static TClient CreateCore<TClient>(string baseAddress, HttpClientHandler httpClientHandler) where TClient : ClientBase<TClient>
+        {
+            // Needs to be set before creating the HttpClientHandler
+            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2Support", true);
+
+            var httpClient = new System.Net.Http.HttpClient(httpClientHandler);
+            httpClient.BaseAddress = new Uri(baseAddress, UriKind.RelativeOrAbsolute);
+
+            return Cache<TClient>.Instance.Activator(new HttpClientCallInvoker(httpClient));
         }
 
         private class Cache<TClient>