protected void SendCommand(String Command)
{
var CommandBytes = Encoding.UTF8.GetBytes(Command + "\r\n");
TCPSocket.Poll(SelectMode.SelectWrite, CancellationToken.Value);
Stream.Write(CommandBytes, 0, CommandBytes.Length);
}
private SMTPExtendedResponse ReadSMTPResponse()
{
try
{
if (input == null || input.Length == 0)
{
input = new Byte[64 * 1024];
var nread = 0;
TCPSocket.Poll(SelectMode.SelectRead, CancellationToken.Value);
if ((nread = Stream.Read(input, 0, input.Length)) == 0)
{
throw new Exception("The SMTP server unexpectedly disconnected.");
}
Array.Resize(ref input, nread);
}
var aa = input.TakeWhile(b => b != ' ' && b != '-').ToArray().ToUTF8String();
var more = input[aa.Length] == '-';
var resp = input.Skip(aa.Length + 1).
TakeWhile(b => b != '\r' && b != '\n').
ToArray();
var scode = SMTPStatusCode.SyntaxError;
UInt16 _scode;
if (UInt16.TryParse(aa, out _scode))
{
scode = (SMTPStatusCode)_scode;
}
if (more)
{
input = input.Skip(aa.Length + 1 + resp.Length).SkipWhile(b => b == '\r' || b == '\n').
ToArray();
}
else
{
input = null;
}
return(new SMTPExtendedResponse(scode, resp.ToUTF8String().Trim(), more));
} catch (Exception e)
{
return(new SMTPExtendedResponse(SMTPStatusCode.TransactionFailed, e.Message));
}
}
