/// <summary>
/// Update the headers or body depending on the SmtpResponse object and line of input.
/// </summary>
/// <param name="response">SmtpResponse object</param>
/// <param name="commandData">remainder of input line after SMTP command has been removed</param>
internal void Store(SmtpResponse response, string commandData)
{
if (commandData != null)
{
if (SmtpState.DATA_HDR == response.NextState)
{
int headerNameEnd = commandData.IndexOf(":");
if (headerNameEnd >= 0)
{
string name = commandData.Substring(0, (headerNameEnd) - (0)).Trim();
string value_Renamed = commandData.Substring(headerNameEnd + 1).Trim();
// We use the Add method instead of [] because we can have multiple values for a name
headers.Add(name, value_Renamed);
}
}
else if (SmtpState.DATA_BODY == response.NextState)
{
if (bodyLineCount > 0)
{
body.Append(CR);
}
body.Append(commandData);
bodyLineCount++;
}
}
}
/// <summary>
/// Send response to client.
/// </summary>
/// <param name="output">socket output stream</param>
/// <param name="smtpResponse">Response to send</param>
private void SendResponse(StreamWriter output, SmtpResponse smtpResponse)
{
if (smtpResponse.Code > 0)
{
output.WriteLine(smtpResponse.Code + " " + smtpResponse.Message);
output.Flush();
}
}
/// <summary>
/// Handle an SMTP transaction, i.e. all activity between initial connect and QUIT command.
/// </summary>
/// <param name="output">output stream</param>
/// <param name="input">input stream</param>
/// <returns>List of received SmtpMessages</returns>
private IList HandleSmtpTransaction(StreamWriter output, StreamReader input)
{
// Initialize the state machine
SmtpState smtpState = SmtpState.CONNECT;
SmtpRequest smtpRequest = new SmtpRequest(SmtpActionType.CONNECT, String.Empty, smtpState);
// Execute the connection request
SmtpResponse smtpResponse = smtpRequest.Execute();
// Send initial response
SendResponse(output, smtpResponse);
smtpState = smtpResponse.NextState;
IList msgList = new ArrayList();
SmtpMessage msg = new SmtpMessage();
while (smtpState != SmtpState.CONNECT && smtpState != SmtpState.QUIT)
{
string line = input.ReadLine();
if (line == null)
{
break;
}
// Create request from client input and current state
SmtpRequest request = SmtpRequest.CreateRequest(line, smtpState);
// Execute request and create response object
SmtpResponse response = request.Execute();
// Move to next internal state
smtpState = response.NextState;
// Send reponse to client
SendResponse(output, response);
// Store input in message
msg.Store(response, request.Params);
// If message reception is complete save it
if (smtpState == SmtpState.QUIT)
{
msgList.Add(msg);
msg = new SmtpMessage();
}
}
return(msgList);
}
/// <summary>
/// Update the headers or body depending on the SmtpResponse object and line of input.
/// </summary>
/// <param name="response">SmtpResponse object</param>
/// <param name="commandData">remainder of input line after SMTP command has been removed</param>
internal void Store(SmtpResponse response, string commandData)
{
if (commandData != null)
{
if (SmtpState.DATA_HDR == response.NextState)
{
int headerNameEnd = commandData.IndexOf(":");
if (headerNameEnd >= 0)
{
string name = commandData.Substring(0, (headerNameEnd) - (0)).Trim();
string value_Renamed = commandData.Substring(headerNameEnd + 1).Trim();
// We use the Add method instead of [] because we can have multiple values for a name
headers.Add(name, value_Renamed);
}
}
else if (SmtpState.DATA_BODY == response.NextState)
{
if (bodyLineCount > 0)
body.Append(CR);
body.Append(commandData);
bodyLineCount++;
}
}
}
/// <summary>
/// Send response to client.
/// </summary>
/// <param name="output">socket output stream</param>
/// <param name="smtpResponse">Response to send</param>
private void SendResponse(StreamWriter output, SmtpResponse smtpResponse)
{
if (smtpResponse.Code > 0)
{
output.WriteLine(smtpResponse.Code + " " + smtpResponse.Message);
output.Flush();
}
}
