在 ASP.NET Core 中创建 gRPC 客户端和服务器

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前言

gRPC 是一种高性能、开源的远程过程调用（RPC）框架，它基于 Protocol Buffers（protobuf）定义服务，并使用 HTTP/2 协议进行通信。

新建项目

新建解决方案GrpcDemo

新建webapi项目GrpcServer作为grpc服务端项目

添加包

    <PackageReference Include="Grpc.AspNetCore" Version="2.67.0" />     <PackageReference Include="Grpc.Tools" Version="2.67.0">

新建文本文件greeter.proto

syntax = "proto3";  option csharp_namespace = "GrpcServer";  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; }  // The response message containing the greetings. message HelloReply {   string message = 1; }

编辑GrpcServer项目文件，添加

新建类GreeterService.cs

using Grpc.Core;  namespace GrpcServer {     public class GreeterService : Greeter.GreeterBase     {         private readonly ILogger<GreeterService> _logger;         public GreeterService(ILogger<GreeterService> logger)         {             _logger = logger;         }          public override Task<HelloReply> SayHello(HelloRequest request, ServerCallContext context)         {             return Task.FromResult(new HelloReply             {                 Message = "Hello " + request.Name             });         }     } }

修改Program.cs

 using GrpcServer;  var builder = WebApplication.CreateBuilder(args);  // Add services to the container.  builder.Services.AddControllers(); // Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle builder.Services.AddEndpointsApiExplorer(); builder.Services.AddSwaggerGen();  builder.Services.AddGrpc();  var app = builder.Build();  app.MapGrpcService<GreeterService>();  // Configure the HTTP request pipeline. if (app.Environment.IsDevelopment()) {     app.UseSwagger();     app.UseSwaggerUI(); }  app.UseHttpsRedirection();  app.UseAuthorization();  app.MapControllers();  app.Run();

就是添加下面两行代码

builder.Services.AddGrpc();  app.MapGrpcService<GreeterService>();

新建grpc客户端项目GrpcClient

添加包

    <PackageReference Include="Google.Protobuf" Version="3.28.3" />     <PackageReference Include="Grpc.Net.Client" Version="2.67.0" />     <PackageReference Include="Grpc.Tools" Version="2.67.0">

复制服务器端端的greeter.proto到客户端项目

编辑GrpcClient项目文件，加

编辑Program.cs文件

using Grpc.Net.Client; using GrpcClient;  using var channel = GrpcChannel.ForAddress("https://localhost:7052"); var client = new Greeter.GreeterClient(channel); var reply = await client.SayHelloAsync(                   new HelloRequest { Name = "wxy" }); Console.WriteLine("Greeting: " + reply.Message); Console.WriteLine("Press any key to exit..."); Console.ReadKey();

7052改成你的服务器端运行端口