SignalR.PersistentConnection.ProcessNegotiationRequest C# (CSharp) Method

        private Task ProcessNegotiationRequest(HostContext context)
        {
            var payload = new
            {
                Url = context.Request.Url.LocalPath.Replace("/negotiate", ""),
                ConnectionId = _connectionIdPrefixGenerator.GenerateConnectionIdPrefix(context.Request) + Guid.NewGuid().ToString("d"),
                TryWebSockets = _transportManager.SupportsTransport(WebSocketsTransportName) && context.SupportsWebSockets(),
                WebSocketServerUrl = context.WebSocketServerUrl(),
                ProtocolVersion = "1.0"
            };

            if (!String.IsNullOrEmpty(context.Request.QueryString["callback"]))
            {
                return ProcessJsonpNegotiationRequest(context, payload);
            }

            context.Response.ContentType = Json.MimeType;
            return context.Response.EndAsync(_jsonSerializer.Stringify(payload));
        }