WebSocketSharp.Net.HttpListener.SelectAuthenticationScheme C# (CSharp) Method

        internal AuthenticationSchemes SelectAuthenticationScheme(HttpListenerContext context)
        {
            if (AuthenticationSchemeSelectorDelegate != null)
                return AuthenticationSchemeSelectorDelegate (context.Request);
            else
                return auth_schemes;
        }

        internal bool Authenticate()
        {
            var schm = _listener.SelectAuthenticationScheme(_request);

            if (schm == AuthenticationSchemes.Anonymous)
            {
                return(true);
            }

            if (schm == AuthenticationSchemes.None)
            {
                _response.Close(HttpStatusCode.Forbidden);
                return(false);
            }

            var realm = _listener.GetRealm();
            var user  =
                HttpUtility.CreateUser(
                    _request.Headers["Authorization"],
                    schm,
                    realm,
                    _request.HttpMethod,
                    _listener.GetUserCredentialsFinder()
                    );

            if (user == null || !user.Identity.IsAuthenticated)
            {
                _response.CloseWithAuthChallenge(new AuthenticationChallenge(schm, realm).ToString());
                return(false);
            }

            _user = user;
            return(true);
        }