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[/code] 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 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<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.cspublic 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/DebugGreeterServer.exe运行客户端cd GreeterClient/bin/DebugGreeterClient.exe参考文章：grpc官方文档-gRPC官方文档中文版
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