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

打开下载的demo文C:\Users\YPF\Desktop\grpc

进入目录examples/csharp/helloworld

Build the example

使用Visual Studio打开Greeter.sln

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

运行服务

> cd GreeterServer/bin/Debug > GreeterServer.exe

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 greetings message 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<HelloReply> SayHello(HelloRequest request, ServerCallContext context) { return Task.FromResult(new HelloReply { Message = "Hello " + request.Name }); } // Server side handler for the SayHelloAgain RPC public override Task<HelloReply> 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