公共数据

InMemoryData.cs

    public class InMemoryData
    {
        public static List Employees = new List
        {
            new Employee
            {
                Id = 10001,
                No= 2000,
                FirstName = "张",
                LastName = "飞",
                Salary = 3500
            },
            new Employee
            {
                Id = 10002,
                No= 1990,
                FirstName = "刘",
                LastName = "备",
                Salary = 5500
            },
            new Employee
            {
                Id = 10003,
                No= 1995,
                FirstName = "关",
                LastName = "羽",
                Salary = 4500
            },
        };
    }

一元消息

Service

安装包

Grpc.AspNetCore

创建proto

创建一个文件夹Protos, 并且创建一个文件

Messages.proto

syntax = "proto3";

option csharp_namespace = "GrpcServer.Web.Protos";

message Employee{
	int32 id = 1;
	int32 no = 2;
	string firstName = 3;
	string lastName = 4;
	float  salary = 5;
}

message GetByNoRequest{
	int32 no =1;
}

message EmployeeRequest{
	Employee employee = 1;
}

message EmployeeResponse{
	Employee employee = 1;
}

message GetAllRequest{}

message AddPhotoRequest{
	bytes data = 1;
}

message AddPhotoResponse{
	bool isOk = 1;
}

service EmployeeService{
	rpc GetByNo (GetByNoRequest) returns(EmployeeResponse);
	rpc GetAll (GetAllRequest) returns(stream EmployeeResponse);
	rpc AddPhoto (stream AddPhotoRequest) returns (AddPhotoResponse);
	rpc Save (EmployeeRequest) returns (EmployeeResponse);
	rpc SaveAll (stream EmployeeRequest) returns (stream EmployeeRequest);
}

然后设置属性。

设置后生成一次应用程序生成。

编写 Service

using Grpc.Core;
using GrpcServer.Web.Data;
using GrpcServer.Web.Protos;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace GrpcServer.Web.Services
{
    public class MyEmployeeService : EmployeeService.EmployeeServiceBase
    {
        public readonly ILogger _logger;
        public MyEmployeeService(ILogger logger)
        {
            _logger = logger;
        }

        public override Task GetByNo(GetByNoRequest request, ServerCallContext context)
        {
            var employee = InMemoryData.Employees
                            .SingleOrDefault(x => x.No == request.No);

            //client 发送的元数据(Metadata)
            var metadata = context.RequestHeaders;

            foreach (var item in metadata)
            {
                _logger.LogInformation($"Metadata RequestHeaders: {item.Key}:{item.Value}");
            }

            if (employee is not null)
            {
                var response = new EmployeeResponse
                {
                    Employee = employee
                };

                return Task.FromResult(response);
            }
            throw new Exception(message: $"employee is null.");
            //return base.GetByNo(request, context);
        }
    }
}

配置Startup.cs

services.AddGrpc(); //service 注册

app.UseEndpoints(endpoints =>
{
	endpoints.MapGrpcService(); //将传入请求映射到指定的 TService 类型。
});

Client

安装包

Google.Protobuf Potobuf 序列化协议的包

Grpc.Net.Client 客户端的包

Grpc.Tools 命令行工具

编写 Client

using Grpc.Core;
using Grpc.Net.Client;
using GrpcServer.Web.Protos;
using System;
using System.Threading.Tasks;

namespace GrpcClient
{
    class Program
    {
        static async Task Main(string[] args)
        {
            using var channel = GrpcChannel.ForAddress("https://localhost:5001");
            var client = new EmployeeService.EmployeeServiceClient(channel);
			//发送给sevice的元数据
            var header = new Metadata
            {
                 { "role","Admin"},
                { "username","testAdmin"}
             };
            var response = await client.GetByNoAsync(new GetByNoRequest
            {
                No = 1995
            }, header);

            Console.WriteLine($"message:{response}");
            Console.WriteLine("Press key to exit.");
            Console.ReadLine();
        }
    }
}

输出结果：

原文：https://www.cnblogs.com/tangge/p/15221300.html