[网络协议]c# websocket 服务端

using Fleck;
using Mono.Web;
using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace demoforQQ.WebSocket
{
    public partial class WebSocketForm : Form
    {
        public WebSocketForm()
        {
            InitializeComponent();
            this.WindowState = FormWindowState.Minimized;
            this.ShowInTaskbar = false;
        }

        private void WebSocketForm_Load(object sender, EventArgs e)
        {
            runSocket();
        }

        static void runSocket()
        {
            //FleckLog.Level = LogLevel.Debug;
            //var allSockets = new List<IWebSocketConnection>();
            Dictionary<string, dynamic> dicSocketServer = new Dictionary<string, dynamic>();
            Dictionary<string, dynamic> dicSocketCustomer = new Dictionary<string, dynamic>();
            string userIp = "";
            var server = new WebSocketServer("ws://0.0.0.0:1818");
            server.Start(socket =>
            {
                userIp = socket.ConnectionInfo.ClientIpAddress.ToString();

                var ClientIp = socket.ConnectionInfo.ClientIpAddress;
                var Path = socket.ConnectionInfo.Path;
                var url = "http://" + ClientIp + Path;
                Uri myUri = new Uri(url);

                string role = HttpUtility.ParseQueryString(myUri.Query).Get("role");
                var ClientPort = socket.ConnectionInfo.ClientPort;
                var key = role + ClientPort;
              
                socket.OnOpen = () =>
                {
                    Console.WriteLine(key + "已上线!");
                    //allSockets.Add(socket);
                    if (role == "customer")
                    {
                        if (!dicSocketCustomer.ContainsKey(key))
                        {
                            dicSocketCustomer.Add(key, socket);
                        }
                    }
                    if (role == "server")
                    {
                        if (!dicSocketServer.ContainsKey(key))
                        {
                            dicSocketServer.Add(key, socket);
                        }
                    }

                };
                socket.OnClose = () =>
                {
                    Console.WriteLine(key + "下线了!");
                    //allSockets.Remove(socket);
                    if (role == "customer")
                    {
                        dicSocketCustomer.Remove(key);
                    }
                    if (role == "server")
                    {
                        dicSocketServer.Remove(key);
                    }

                };
                socket.OnMessage = message =>
                {
                    //Console.WriteLine("消息发送者:" + key);
                    //Console.WriteLine("消息:" + message);
                    /*Console.WriteLine("role:" + role);*/
                    if (role == "server")
                    {
                        //广播给 customer
                        foreach (var perCustomer in dicSocketCustomer)
                        {
                            var sc = perCustomer.Value;
                            sc.Send(message);
                            
                        }
                    }

                    if (role == "customer")
                    {
                        //Console.WriteLine(dicSocketCustomer.Count);
                        //广播给 customer  ，server收不到信息
                        foreach (var perCustomer in dicSocketCustomer)
                        {
                            var sc = perCustomer.Value;
                            sc.Send(message);
                        }
                    }

                };
            });
        }
    }
}

此项目是做收银端和客显端显示，有customer和server身份区分，对应https://blog.csdn.net/weixin_42674576/article/details/121703047?spm=1001.2014.3001.5501，可根据自己需求做调整