void AcceptResponse(string line = null)
{
if (line == null)
{
line = ClientReader.ReadLine();
}
ProcessMessage(new FtpResponse(line));
}
void ProcessMessage(FtpResponse response, bool suppressSet = false)
{
var code = response.Code;
var multiline = response.Multiline;
var message = response.Message;
var raw = response.Raw;
if (ResponseReceived != null)
{
ResponseReceived(this, new ResponseReceivedEventArgs(response));
}
// Log the message
LogMessage(code, message);
// Set flags indicating whether the response
// indicates success or failure
var state = ClientState.None;
if (code.IsInRange(100, 300))
{
state |= ClientState.GoodResponse;
}
else if (code.IsInRange(300, 600))
{
state |= ClientState.BadResponse;
}
// Check the message code and act accordingly
switch (code)
{
case 110:
// Restart marker reply
break;
case 120:
// Service ready in nnn minutes
break;
case 125:
// Data connection already open; transfer starting
break;
case 150:
// File status okay; about to open data connection
break;
case 200:
// Command okay
break;
case 202:
// Command not implemented, superfluous at this site
break;
case 211:
// System status, or system help reply
// Response to FEAT
if (multiline)
{
string line = ClientReader.ReadLine();
while (!Regex.IsMatch(line, RegexConstants.Multiline_End))
{
ProcessMessage(new FtpResponse(000, line, false), true);
line = ClientReader.ReadLine();
}
AcceptResponse(line);
}
break;
case 212:
// Directory status
break;
case 213:
// File status
break;
case 214:
// Help message
break;
case 215:
// System type
break;
case 220:
// Service ready for new user
//if (ServiceReady)
// suppressSet = true;
//ServiceReady = true;
break;
case 221:
// Service closing control connection
break;
case 225:
// Data connection open; no traClientStreamfer in progress
break;
case 226:
// Closing data connection
if (DataConnectionClosed != null)
{
DataConnectionClosed(this, EventArgs.Empty);
}
break;
case 227:
// Entering passive mode (h1,h2,h3,h4,p1,p2)
IPEndPoint endpoint = null;
try {
endpoint = Parsers.ParsePasvResponse(message);
Data.EndPoint = endpoint;
} catch (Exception e) {
LogMessage(000, string.Format("Error parsing endpoint: {0}", e.Message));
}
state |= ClientState.OperationFailed;
break;
case 230:
// User logged in, proceed
break;
case 250:
// Requested file action okay, completed
break;
case 257:
// "PATHNAME" created
break;
case 331:
// User name okay, need password
if (string.IsNullOrEmpty(Password))
{
state |= ClientState.ExitRequested;
}
break;
case 332:
// Need account for login
break;
case 350:
// Requested file action pending further information
case 421:
// Service not available, closing control connection
// Also: Login time exceeded
state |= ClientState.ExitRequested;
break;
case 425:
// Can't open data connection
break;
case 426:
// Connection closed; transfer aborted
break;
case 450:
// Requested file action not taken
break;
case 451:
// Requested action aborted. Local error in processing
break;
case 452:
// Requested action not taken
// Insufficient storage space in system
break;
case 500:
// Syntax error or
// Command unrecognized
break;
case 501:
// Syntax error in parameters or arguments
break;
case 502:
// Command not implemented
break;
case 503:
// Bad sequence of commands
break;
case 504:
// Command not implemented for that parameter
break;
case 530:
// Not logged in
break;
case 532:
// Need account for storing files
break;
case 550:
// Requested action not taken
break;
case 551:
// Requested action aborted. Page type unknown
break;
case 552:
// Requested file action aborted
// Exceeded storage allocation
break;
case 553:
// Requested action not taken
// File name not allowed
break;
}
// Allow the operation to continue
CurrentState = state;
if (!suppressSet)
{
MessageHandler.Set();
MessageHandler.Reset();
}
}
private void ClientListening()
{
string message;
lock (clientLocker)
{
if (ClientConnected)
{
try
{
ClientWriter.WriteLine("-- " + Properties.strings.motd + ": " + ConnectedServer.WelcomeMessage);
ClientWriter.Flush();
ClientWriter.Write("-- " + Properties.strings.enterNickname + ": ");
ClientWriter.Flush();
}
catch (IOException) { }
}
}
try
{
do
{
string name = ClientReader.ReadLine();
if (string.IsNullOrWhiteSpace(name))
{
lock (clientLocker)
{
if (ClientConnected)
{
ClientWriter.Write("-- " + Properties.strings.enterNickname + ": ");
ClientWriter.Flush();
}
}
}
else
{
Name = name;
}
} while (string.IsNullOrWhiteSpace(name));
}
catch (IOException) { }
ConnectedServer.RefreshInfo();
ConnectedServer.WriteToAllClients("-- " + string.Format(Properties.strings.connectedWithClient,
Name + "@" + ClientIep.Address, ClientIep.Port));
lock (clientLocker)
{
if (ClientConnected)
{
try
{
ClientWriter.WriteLine("-- " + Properties.strings.commands);
ClientWriter.Flush();
}
catch (IOException) { }
}
}
while (ClientConnected)
{
try
{
message = ClientReader.ReadLine();
if (message != null)
{
//Handles available commands
if (!string.IsNullOrWhiteSpace(message))
{
if (message[0] == '#')
{
if (message == Properties.strings.exit)
{
lock (clientLocker)
if (ClientConnected)
{
CloseConnection();
}
}
else if (message == Properties.strings.list)
{
lock (clientLocker)
if (ClientConnected)
{
ConnectedServer.List(this);
}
}
else if (message == Properties.strings.cmd)
{
lock (clientLocker)
{
if (ClientConnected)
{
ClientWriter.WriteLine("-- " + Properties.strings.availableCommands + ": ");
ClientWriter.Flush();
ClientWriter.WriteLine("\t-- " + Properties.strings.cmd + ": " + Properties.strings.cmdInfo);
ClientWriter.Flush();
ClientWriter.WriteLine("\t-- " + Properties.strings.exit + ": " + Properties.strings.exitInfo);
ClientWriter.Flush();
ClientWriter.WriteLine("\t-- " + Properties.strings.list + ": " + Properties.strings.listInfo);
ClientWriter.Flush();
}
}
}
else
{
lock (clientLocker)
{
if (ClientConnected)
{
ClientWriter.WriteLine("-- " + Properties.strings.unknownCmd);
ClientWriter.Flush();
}
}
}
}
else
{
ConnectedServer.WriteToAllClients("|| " + Name + "@" + ClientIep.Address + " >> " + message);
}
}
else
{
lock (clientLocker)
{
if (ClientConnected)
{
ClientWriter.WriteLine("-- " + Properties.strings.enterMessage);
ClientWriter.Flush();
}
}
}
}
else
{
CloseConnection();
}
}
catch (IOException)
{
break;
}
}
CloseConnection();
}
