void Session_MessageReceived(object sender, MessageEventArgs e)
{
// Save the message in the preset pickup directory
// ensure we can write
FileIOPermission permission = new FileIOPermission(FileIOPermissionAccess.Write, DumpPath);
permission.Assert();
StreamWriter file
= File.AppendText(DumpPath);
try
{
file.Write(_LineTerminator + "---------------START OF MESSAGE-------------------" + _LineTerminator);
file.Write("Message Id: " + e.MessageId + _LineTerminator);
file.Write(_LineTerminator + "From: " + e.From + _LineTerminator);
file.Write("To: " + e.ToAsList() + _LineTerminator);
file.Write(_LineTerminator + "Subject: " + e.Subject + _LineTerminator);
file.Write("Data: " + e.Data + _LineTerminator);
file.Write(_LineTerminator + "---------------END OF MESSAGE---------------------" + _LineTerminator);
file.Close();
SetStatus(String.Format("Recieved: {0}", e.Subject));
}
finally { file.Close(); }
}
/// <summary>
/// Connect and check incomming data
/// </summary>
public void Connect()
{
_Status = StatusEnum.Connected;
if (this.Connected != null)
{
this.Connected(this, new EventArgs());
}
MessageEventArgs message = null;
try
{
_Socket = _Listener.AcceptSocket();
_NetworkStream = new NetworkStream(_Socket, FileAccess.ReadWrite, true);
WriteLine(
string.Format(
"220 Welcome {0}, LOCALHOST-SMTP:",
((IPEndPoint)_Socket.RemoteEndPoint).Address));
while (_Socket.Connected)
{
string data = this.Read(_LineTerminator);
if (data == null) { break; }
else
{
if (data.StartsWith("QUIT", StringComparison.InvariantCultureIgnoreCase))
{
Disconnect();
}
else if (data.StartsWith("EHLO", StringComparison.InvariantCultureIgnoreCase)
|| data.StartsWith("HELO", StringComparison.InvariantCultureIgnoreCase))
{
this.WriteGreeting(data.Substring(4).Trim());
_Status = StatusEnum.Identified;
}
else if (_Status < StatusEnum.Identified)
{
this.WriteError(ErrorEnum.BadCommandSequence, "Expected HELO <Your Name>");
}
else
{
if (data.StartsWith("MAIL", StringComparison.InvariantCultureIgnoreCase))
{
if (_Status != StatusEnum.Identified
&& _Status != StatusEnum.Data)
{
this.WriteError(ErrorEnum.BadCommandSequence, "Command out of sequence");
}
else
{
// create a new message
message = new MessageEventArgs();
message.From = TextFunctions.Tail(data, ":");
_Status = StatusEnum.Mail;
this.WriteOk();
}
}
else if (data.StartsWith("RCPT", StringComparison.InvariantCultureIgnoreCase))
{
if (_Status != StatusEnum.Mail
&& _Status != StatusEnum.Recipient)
{
this.WriteError(ErrorEnum.BadCommandSequence, "Command out of sequence");
}
else
{
message.To.Add(TextFunctions.Tail(data, ":"));
_Status = StatusEnum.Recipient;
this.WriteOk();
}
}
else if (data.StartsWith("DATA", StringComparison.InvariantCultureIgnoreCase))
{
// request data
this.WriteSendData();
message.Data = this.Read(_DataTerminator);
// raise event
if (this.MessageReceived != null)
{
this.MessageReceived(this, message);
message = null;
}
_Status = StatusEnum.Data;
this.WriteOk();
}
else
{
this.WriteError(ErrorEnum.CommandNotImplemented, "Command not implemented");
}
}
}
}
}
catch (Exception ex)
{
Trace.Write(ex);
Disconnect();
}
}
