EVCB_OCPP.OCPPServer.16J/EVCB_OCPP.WSServer/SuperSocket.Protocol/OCPPWSServer.cs


using EVCB_OCPP.Domain;
using NLog;
using OCPPPackage.Profiles;
using SuperWebSocket;
using SuperWebSocket.SubProtocol;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;

namespace OCPPServer.Protocol
{
    public class OCPPWSServer : WebSocketServer<ClientData>
    {

        static private ILogger logger = NLog.LogManager.GetCurrentClassLogger();
        /// <summary>
        /// 可允許連線Clinet數
        /// </summary>
        public int connectNum { get; set; }

        /// <summary>
        /// 是否限制連線Clinet數
        /// </summary>
        public bool beConnectLimit { get; set; }

        /// <summary>
        /// Initializes a new instance of the <see cref="WebSocketServer"/> class.
        /// </summary>
        /// <param name="subProtocols">The sub protocols.</param>
        public OCPPWSServer(IEnumerable<ISubProtocol<ClientData>> subProtocols)
            : base(subProtocols)
        {
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="WebSocketServer"/> class.
        /// </summary>
        /// <param name="subProtocol">The sub protocol.</param>
        public OCPPWSServer(ISubProtocol<ClientData> subProtocol)
            : base(subProtocol)
        {
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="WebSocketServer"/> class.
        /// </summary>
        public OCPPWSServer()
            : base(new List<ISubProtocol<ClientData>>())
        {

        }

        protected override bool ValidateClientCertificate(ClientData session, object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
        {
            //  Console.WriteLine(string.Format("{0} :{1}", session.ChargeBoxId + " ValidateClientCertificate", sslPolicyErrors));
            return true;
            // return base.ValidateClientCertificate(session, sender, certificate, chain, sslPolicyErrors);
        }

        protected override bool ValidateHandshake(ClientData session, string origin)
        {
            session.ISOCPP20 = session.SecWebSocketProtocol.ToLower().Contains("ocpp2.0");

            int securityProfile = 0;
            string authorizationKey = string.Empty;
            if (string.IsNullOrEmpty(session.Path))
            {
                logger.Warn("===========================================");
                logger.Warn("session.Path EMPTY");
                logger.Warn("===========================================");
            }

            string[] words = session.Path.Split('/');
            session.ChargeBoxId = words.Last();

            if (ConfigurationManager.AppSettings["MaintainMode"] == "1")
            {
                session.ChargeBoxId = session.ChargeBoxId + "_2";
            }

            logger.Info(string.Format("ValidateHandshake: {0}", session.Path));
            bool isExistedSN = false;
            bool authorizated = false;
          //  using (var db = new MainDBContext())
            {

                session.CustomerId = Guid.Empty;
                session.MachineId = String.Empty;
                isExistedSN  =true;

                if (!isExistedSN)
                {
                    StringBuilder responseBuilder = new StringBuilder();

                    responseBuilder.AppendFormatWithCrCf(@"HTTP/{0} {1} {2}", "1.1",
                    (int)HttpStatusCode.NotFound, @"Not Found");
                  
                    responseBuilder.AppendWithCrCf();
                    string sb = responseBuilder.ToString();
                    byte[] data = Encoding.UTF8.GetBytes(sb);
                    ((IWebSocketSession)session).SendRawData(data, 0, data.Length);

                    logger.Info(sb);
                    return false;
                }

              

                if (session.ISOCPP20)
                {
                    // 1.6 server only support change server  function
                    securityProfile = 0;
                }
            }
            if (securityProfile == 3 && session.UriScheme == "ws")
            {
                StringBuilder responseBuilder = new StringBuilder();

                responseBuilder.AppendFormatWithCrCf(@"HTTP/{0} {1} {2}", "1.1",
                (int)HttpStatusCode.Unauthorized, @"Unauthorized");

                responseBuilder.AppendWithCrCf();
                string sb = responseBuilder.ToString();
                byte[] data = Encoding.UTF8.GetBytes(sb);

                ((IWebSocketSession)session).SendRawData(data, 0, data.Length);
                logger.Info(sb);
                return false;
            }

            if ((securityProfile == 1 || securityProfile == 2))
            {
                if (securityProfile == 2 && session.UriScheme == "ws")
                {
                    authorizated = false;
                }               

            }
            
            return true;
        }
    }
}