/// <summary>
/// Secure SMTP OAuth2 constructor
/// </summary>
/// <param name="RefreshTokenFileName">Refresh token file name</param>
public SecureSmtpOAuth2
(
string RefreshTokenFileName
)
{
// no file name
if (string.IsNullOrWhiteSpace(RefreshTokenFileName))
{
throw new ApplicationException("Refresh token file name is missing or empty");
}
// look for refresh token
RefreshToken = SecureSmtpRefreshToken.LoadState(RefreshTokenFileName);
if (RefreshToken == null)
{
throw new ApplicationException("SecureSmtpRefreshToken.xml file is missing or invalid");
}
return;
}
////////////////////////////////////////////////////////////////////
// Load Program State
////////////////////////////////////////////////////////////////////
/// <summary>
/// Load Program State
/// </summary>
/// <param name="FileName">Refresh token file name</param>
/// <returns>Refresh token class</returns>
public static SecureSmtpRefreshToken LoadState
(
string FileName
)
{
// program state file does not exist
if (!File.Exists(FileName))
{
return(null);
}
XmlTextReader TextFile = null;
SecureSmtpRefreshToken State = null;
try
{
// read program state file
TextFile = new XmlTextReader(FileName);
// create xml serializing object
XmlSerializer XmlFile = new XmlSerializer(typeof(SecureSmtpRefreshToken));
// deserialize the program state
State = (SecureSmtpRefreshToken)XmlFile.Deserialize(TextFile);
}
catch
{
State = null;
}
// close the file
if (TextFile != null)
{
TextFile.Close();
}
// exit
return(State);
}