服务端

来个最简单的hub类

    public class ChatHub:Hub
    {
        public async Task SendMessage(object user, string message)
        {
            await Clients.All.SendAsync("ReceiveMessage", user, message);
        }
        public override Task OnConnectedAsync()
        {
            //这里可以自定义操作 具体您可以看下官方文档
            return base.OnConnectedAsync(); 
        }
    }

Startup类

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSignalR()
                    .AddMessagePackProtocol();

            //ioc容器中注入了一个 IHubContext<ChatHub> 大家都是老手，就不多bb了
            services.AddSingleton<ChatHub>();
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapHub<ChatHub>("/chat");
            });
        }

客户端

以最简单的Nodejs 为例

装个包先

$ npm install @microsoft/signalr

js入口文件

这种简单的demo就不多bb了 ^^

//其他东西您可以看看npm文档
var signalR = require('@microsoft/signalr')

var connection = new signalR.HubConnectionBuilder()
    .withUrl("http://localhost:5000/chat")
    .configureLogging(signalR.LogLevel.Information)
    .build();

async function start() {
    await connection.start();
    connection.on('ReceiveMessage', (user, message) => {
        console.log(user, message);
    })
    for (let i = 0; i < 100; i++) {
        await new Promise(resolve => {
            setTimeout(async () => {
                await connection.invoke('SendMessage', { name: `user${i}` , age: i }, `msg${i}` )
                resolve()
            }, 500);
        })
    }
};

connection.onclose(start);

start();