asp.net core 3.0 gRPC框架小试

syntax = "proto3";

package Greet;

// The greeting service definition.
service Greeter {
  // Sends a greeting
  rpc SayHello (HelloRequest) returns (HelloReply) {}
}

// The request message containing the user‘s name.
message HelloRequest {
  string name = 1;
  enum Language{
    en_us = 0; //枚举必须以0开始
    zh_cn = 1;
  }
  Language languageEnum = 2;
}

// The response message containing the greetings.
message HelloReply {
  string message = 1;
  int32 num = 2;
  int32 adsa = 3;
}

public class GreeterService : Greeter.GreeterBase
{
    public override Task<HelloReply> SayHello(HelloRequest request, ServerCallContext context)
    {
        var greeting = string.Empty;
        switch (request.LanguageEnum)
        {
            case HelloRequest.Types.Language.EnUs:
                greeting = "Hello";
                break;
            case HelloRequest.Types.Language.ZhCn:
                greeting = "你好";
                break;
        }

        return Task.FromResult(new HelloReply
        {
            Message = $"{greeting} {request.Name}",
            Num = new Random().Next()
        });
    }
}

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp3.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Google.Protobuf" Version="3.7.0" />
    <PackageReference Include="Grpc.Core" Version="1.20.1" />
    <PackageReference Include="Grpc.Tools" Version="1.20.1">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <!-- Include支持*匹配 -->
    <!-- GrpcServices="Client"添加该属性构建相关客户端类文件(元数据) -->
    <Protobuf Include="..\GrpcDemo.Server\Protos\*.proto" GrpcServices="Client" />
  </ItemGroup>
  
</Project>

static async Task Main(string[] args)
{
    var serverAddress = "localhost:50051";
    //创建连接通道，端口80
    var channel = new Channel(serverAddress, ChannelCredentials.Insecure);
    var client = new Greeter.GreeterClient(channel);

    //请求
    var reply1 = await client.SayHelloAsync(
        new HelloRequest { Name = "wu", LanguageEnum = HelloRequest.Types.Language.EnUs });
    Console.WriteLine($"{reply1.Message} Num:{reply1.Num}");
    var reply2 = await client.SayHelloAsync(
        new HelloRequest { Name = "wu", LanguageEnum = HelloRequest.Types.Language.ZhCn });
    Console.WriteLine($"{reply2.Message} Num:{reply2.Num}");

    //使用完后应释放资源
    await channel.ShutdownAsync();
    Console.WriteLine("已断开连接");
    Console.WriteLine("Press any key to exit...");
    Console.ReadKey();
}