internal static extern bool InternetGetLastResponseInfo(out ERROR_INTERNET error, StringBuilder buffer, ref int bufferLength);
internal static void ThrowException(FtpWebResponse response)
{
System.Net.WebExceptionStatus status = System.Net.WebExceptionStatus.Success;
ERROR_INTERNET error = (ERROR_INTERNET)Marshal.GetLastWin32Error();
string message = string.Empty;
if (error == 0)
{
return;
}
ERROR_INTERNET lrError;
string lastResponse = Ftp.GetLastResponseInfo(out lrError);
if (string.IsNullOrEmpty(lastResponse))
{
message = "Unable to connect to the remote server";
}
else
{
message = "Server response: " + lastResponse;
}
//try to get most relevant webexceptionstatus
switch (error)
{
case ERROR_INTERNET.CONNECTION_ABORTED:
case ERROR_INTERNET.CONNECTION_RESET:
case ERROR_INTERNET.DISCONNECTED:
case ERROR_INTERNET.FTP_DROPPED:
status = System.Net.WebExceptionStatus.ConnectionClosed;
break;
case ERROR_INTERNET.CANNOT_CONNECT:
case ERROR_INTERNET.SERVER_UNREACHABLE:
case ERROR_INTERNET.FTP_NO_PASSIVE_MODE:
status = System.Net.WebExceptionStatus.ConnectFailure;
break;
case ERROR_INTERNET.TIMEOUT:
status = System.Net.WebExceptionStatus.Timeout;
break;
case ERROR_INTERNET.SECURITY_CHANNEL_ERROR:
status = System.Net.WebExceptionStatus.SecureChannelFailure;
break;
case ERROR_INTERNET.NAME_NOT_RESOLVED:
status = System.Net.WebExceptionStatus.NameResolutionFailure;
break;
default:
/*case ERROR_INTERNET.INCORRECT_PASSWORD:
* case ERROR_INTERNET.INCORRECT_USER_NAME:
* case ERROR_INTERNET.FTP_TRANSFER_IN_PROGRESS:
* case ERROR_INTERNET.LOGIN_FAILURE:*/
status = System.Net.WebExceptionStatus.ProtocolError;
break;
}
throw new System.Net.WebException(message, InTheHand.ComponentModel.Win32ExceptionInTheHand.Create((int)error), status, response);
}
