gRPC官方快速上手学习笔记（c#版）

上手前准备工作

支持操作系统：windows、OS X、Linux。实例采用.net、.net core sdk。

• The .NET Core SDK command line tools.

• The .NET framework 4.5 (for OS X and Linux, the open source .NET Framework implementation, “Mono”, at version 4+, is suitable)

• Git (to download the sample code)

在windows系统开发环境, 采用 Visual Studio开发工具, 需要满足以下要求:

• .NET Framework 4.5+

• Visual Studio 2013 or 2015.

• Git (to download the sample code)

  在OS X 系统开发环境, 采用Xamarin Studio开发工具, 需要满足以下要求:

• Mono 4.4.2+ (or Mono 4+ is sufficient if you manually update NuGet to version 2.12+)

• Xamarin Studio 6.0+

• Git (to download the sample code)

  在 Linux 系统开发环境, 采用 the Monodevelop IDE,需要满足以下要求 :

• Mono 4.4.2+ (or Mono 4+ is sufficient if you manually update nuget to version 2.12+)

• MonoDevelop 5.9+

• A NuGet executable, at version 2.12+ (you’ll need to restore NuGet package dependencies from the command line)

• Git (to download the sample code)

下载官方demo

git clone -b v1.6.x https://github.com/grpc/grpc

1. 打开下载的demo文C:\Users\YPF\Desktop\grpc

2. 进入目录examples/csharp/helloworld

Build the example

1. 使用Visual Studio打开Greeter.sln

2. 在该项目的解决右键重新生成解决方案
   

项目会自动使用NuGet进行必要的package的安装。

运行 a gRPC application

1. 运行服务

   > cd GreeterServer/bin/Debug> GreeterServer.exe

   

2. 运行客户端

   > cd GreeterClient/bin/Debug> GreeterClient.exe

   

更新 a gRPC service

打开目录examples/protos/helloworld.proto
将原来的文件修改为如下并保存：

// The greeting service definition.service Greeter {  // Sends a greeting
  rpc SayHello (HelloRequest) returns (HelloReply) {}  // Sends another greeting
  rpc SayHelloAgain (HelloRequest) returns (HelloReply) {}
}// The request message containing the user's name.message HelloRequest {  string name = 1;
}// The response message containing the greetingsmessage HelloReply {  string message = 1;
}

生成 gRPC code

在demo的根目录（examples/csharp/helloworld）下执行如下命令:

packages\Grpc.Tools.1.6.1\tools\windows_x86\protoc.exe -I../../protos --csharp_out Greeter --grpc_out Greeter ../../protos/helloworld.proto --plugin=protoc-gen-grpc=packages/Grpc.Tools.1.6.1/tools/windows_x86/grpc_csharp_plugin.exe

这里的Grpc.Tools.1.6.1这个命令必须是跟项目中使用NuGet安装的版本一致，否则会报错。

更新并从新运行

修改服务端代码

GreeterServer/Program.cs

class GreeterImpl : Greeter.GreeterBase

{

    // Server side handler of the SayHello RPC

    public override Task SayHello(HelloRequest request, ServerCallContext context)

    {

        return Task.FromResult(new HelloReply { Message = "Hello " + request.Name });

    }

    // Server side handler for the SayHelloAgain RPC

    public override Task SayHelloAgain(HelloRequest request, ServerCallContext context)

    {

        return Task.FromResult(new HelloReply { Message = "Hello again " + request.Name });

    }

}




修改服务端代码

GreeterClient/Program.cs

public static void Main(string[] args)

{

    Channel channel = new Channel("127.0.0.1:50051", ChannelCredentials.Insecure);

    var client = new Greeter.GreeterClient(channel);

    String user = "you";

    var reply = client.SayHello(new HelloRequest { Name = user });

    Console.WriteLine("Greeting: " + reply.Message);

    

    var secondReply = client.SayHelloAgain(new HelloRequest { Name = user });

    Console.WriteLine("Greeting: " + secondReply.Message);

    channel.ShutdownAsync().Wait();

    Console.WriteLine("Press any key to exit...");

    Console.ReadKey();

}

运行 a gRPC application

• 运行服务

  cd GreeterServer/bin/Debug
  GreeterServer.exe

• 运行客户端

  cd GreeterClient/bin/Debug
  GreeterClient.exe

参考文章：

• grpc官方文档
  -gRPC官方文档中文版

原文地址：http://www.cnblogs.com/ypfnet/p/7606638.html

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