public void SlideExpirationIfValidTicket()
{
if (HttpContext.Current == null)
{
return;
}
var httpContext = new HttpContextWrapper(HttpContext.Current);
var log = _logProvider.GetLogger(GetType().Name);
// if there is already a new value for cookie present in the response, skip the operation
if (httpContext.Response.Cookies.AllKeys.Contains(FormsAuthentication.FormsCookieName))
{
return;
}
var ticket = TicketUtility.GetExistingTicket(httpContext);
if (ticket == null)
{
return;
}
// if ticket has expired, lets do some housekeeping and remove it from cookies
if (ticket.Expired)
{
log.Trace(() => $"Found expired ticket, removing it.");
TicketUtility.AddToResponseCookie(null, httpContext);
return;
}
log.Trace(() => $"Found valid existing ticket with expiration: {ticket.Expiration.ToString("s")}");
var ageLeft = ticket.Expiration - DateTime.Now;
// do nothing if half of timeout has not yet passed
if (ageLeft.TotalSeconds > TicketUtility.TicketTimeout.Value.TotalSeconds / 2)
{
return;
}
log.Trace(() => $"Cookie age left is {ageLeft.TotalMinutes:0} minutes, refreshing expiration.");
var newTicket = new FormsAuthenticationTicket(
ticket.Version,
ticket.Name,
ticket.IssueDate,
DateTime.Now + TicketUtility.TicketTimeout.Value,
false,
ticket.UserData,
ticket.CookiePath);
TicketUtility.AddToResponseCookie(newTicket, httpContext);
}
private void SetImpersonatedUser(string impersonatedUser)
{
if (string.IsNullOrEmpty(impersonatedUser))
{
TicketUtility.AddToResponseCookie(null, _httpContextAccessor.HttpContext);
return;
}
var newTicket = new FormsAuthenticationTicket(
_authenticationTicket.Value.Version,
_authenticationTicket.Value.Name,
_authenticationTicket.Value.IssueDate,
_authenticationTicket.Value.Expiration,
false,
impersonatedUser == null ? "" : ImpersonatingUserInfoPrefix + impersonatedUser,
_authenticationTicket.Value.CookiePath);
TicketUtility.AddToResponseCookie(newTicket, _httpContextAccessor.HttpContext);
}