/// <summary>
/// Attempts to validate a ticket for the provided service.
/// </summary>
/// <param name="ticket">the ticket to validate</param>
/// <returns>
/// The ICasPrincipal backed by the CAS Assertion included in the response
/// from the CAS server for a successful ticket validation.
/// </returns>
/// <exception cref="TicketValidationException">
/// Thrown if ticket validation fails.
/// </exception>
public ICasPrincipal Validate(string ticket)
{
string validationUrl = UrlUtil.ConstructValidateUrl(ticket, CasAuthentication.Gateway, CasAuthentication.Renew, CustomParameters);
protoLogger.Debug("Constructed validation URL " + validationUrl);
string serverResponse;
try
{
serverResponse = RetrieveResponseFromServer(validationUrl, ticket);
}
catch (Exception e)
{
protoLogger.Info("Ticket validation failed: " + e);
throw new TicketValidationException("CAS server ticket validation threw an Exception", e);
}
if (serverResponse == null)
{
protoLogger.Warn("CAS server returned no response");
throw new TicketValidationException("The CAS server returned no response.");
}
protoLogger.Debug("Ticket validation response:{0}{1}", Environment.NewLine, serverResponse);
return(ParseResponseFromServer(serverResponse, ticket));
}