ASPC.Marvel.CrimeAPI.TokenValidationHandler.SendAsync C# (CSharp) Метод

        protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
        {
            string tokenRaw = string.Empty;

            try
            {
                if (!TryRetrieveToken(request, out tokenRaw)) { return base.SendAsync(request, cancellationToken); }

                var validationParameters = new TokenValidationParameters()
                {

                    ValidIssuer = SecurityHelper.CertificateValidIssuer,
                    ValidAudience = SecurityHelper.CertificateValidAudience,
                    IssuerSigningToken = new X509SecurityToken(SecurityHelper.GetCertificate()),
                    ValidateLifetime = false,
                    ValidateAudience = true,
                    ValidateIssuer = true,
                    ValidateIssuerSigningKey = true,
                    //ClockSkew = new TimeSpan(40, 0, 0)
                };

                SecurityToken token = new JwtSecurityToken();
                ClaimsPrincipal principal = new JwtSecurityTokenHandler().ValidateToken(tokenRaw, validationParameters, out token);

                Thread.CurrentPrincipal = principal;
                if (HttpContext.Current != null) { HttpContext.Current.User = Thread.CurrentPrincipal; }

            }
            catch (Exception ex)
            {
                Trace.Write(ex);
            }

            return base.SendAsync(request, cancellationToken);
        }