Cut/WebSocketServerSrez/Program.cs

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Net.WebSockets;
using System.Text;
using System.Threading.Tasks;

namespace WebSocketServerSrez
{
    public class Program
    {
        static void Main(string[] args)
        {

            WebSocketServer(11000);
        }

        public static void WebSocketServer(int port)
        {
            IPHostEntry iPHostEntry = Dns.GetHostEntry("localhost");
            IPAddress iPAddress = iPHostEntry.AddressList[0];
            IPEndPoint iPEndPoint = new IPEndPoint(iPAddress, port);

            Socket socketListener = new Socket(iPAddress.AddressFamily, SocketType.Stream,ProtocolType.Tcp);

            try
            {
                socketListener.Bind(iPEndPoint);
                socketListener.Listen(10);

                while (true)
                {
                    Socket handler = socketListener.Accept();
                    string data = null;

                    byte[] bytes = new byte[1024];
                    int bytesRec = handler.Receive(bytes);

                    // Tut
                    data += Encoding.UTF8.GetString(bytes, 0, bytesRec);

                    var dataR = data.Split(' ');

                    if (dataR[0] == "SetUserSession")
                    {
                        Session.IdUser = Convert.ToInt32(dataR[1]);
                        Session.DateStart = DateTime.Now;

                        SetSessionUser setSessionUser = new SetSessionUser()
                        {
                            id_user = Convert.ToInt32(dataR[1]),
                            date_start = DateTime.Now.ToString()
                        };

                        var dataSend = JsonConvert.SerializeObject(setSessionUser, Formatting.Indented);

                        var request = WebRequest.Create("http://127.0.0.1:5000/set_session_user");
                        request.ContentType = "application/json";
                        request.Method = "POST";

                        using (var sw = new StreamWriter(request.GetRequestStream()))
                        {
                            sw.Write(dataSend);
                        }

                        var response = request.GetResponse();
                        using (var sr = new StreamReader(response.GetResponseStream()))
                        {
                            var jsonResp = JsonConvert.DeserializeObject<RespSetSessionUser>(sr.ReadToEnd());
                            
                            byte[] mes = Encoding.UTF8.GetBytes(jsonResp.id_user_session.ToString());

                            handler.Send(mes);
                            handler.Shutdown(SocketShutdown.Both);
                            handler.Close();
                        }
                    }
                    else if (dataR[0] == "UpdateUserSession")
                    {
                        Session.DateFinish = DateTime.Now;

                        var request = WebRequest.Create("http://127.0.0.1:5000/update_session_user");
                        request.ContentType = "application/json";
                        request.Method = "POST";

                        UpdateSessionUser updateSessionUser = new UpdateSessionUser()
                        {
                            Id = Convert.ToInt32(dataR[1]),
                            date_finish = Session.DateFinish.ToString()
                        };

                        var dataSend = JsonConvert.SerializeObject(updateSessionUser, Formatting.Indented);

                        using (var sw = new StreamWriter(request.GetRequestStream()))
                        {
                            sw.Write(dataSend);
                        }
                        request.GetResponse();
                    }
                }
            }
            catch (Exception)
            {
                throw;
            } 
            finally
            {
            }
        }

        public class SetSessionUser
        {
            public int id_user { get; set; }
            public string date_start { get; set; }
        }
        public class RespSetSessionUser
        {
            public int id_user_session { get; set; }
        }

        public class UpdateSessionUser
        {
            public int Id { get; set; }
            public string date_finish { get; set; }
        }
    }
}