/// <summary>
/// Construct an FTP client to connect to the given remote.
/// </summary>
/// <param name="remote"></param>
public FTPClient(String remote)
{
try
{
cmdCon = new FTPConnection(remote);
dataCon = null;
IsOpen = true;
IsDebug = false;
CliMode = ClientMode.Passive;
DatMode = DataMode.Binary;
ServerMessage initialMsg = cmdCon.ReadMessage();
HandleReply(initialMsg);
}
catch (Exception e)
{
Console.Error.WriteLine(e.Message);
IsOpen = false;
}
}
/// <summary>
/// Open a data connection (a la passive mode) on the remote to transfer files (or directory info).
/// This will extract the IP address and port number from a server message.
/// </summary>
/// <param name="msg">The server message that provoked opening a new data connection.</param>
private void SetDataConnection(ServerMessage msg)
{
if (msg.Code != PASSIVE_MODE)
{
Console.Error.Write(
"Attempted to open remote data connection in passive mode.\n{0}",
msg
);
return;
}
if (dataCon != null && dataCon.IsConnected())
{
dataCon.Close();
}
String targetRegex = @"(\d{1,3},){5}\d{1,3}";
Match m = Regex.Match(msg.Text, targetRegex);
if (!m.Success)
{
Console.Error.Write(
"Attempted to open remote data connection but server seems to have given no connection information:\n{0}",
msg
);
return;
}
String target = m.Value;
String[] byteStrs = target.Split(',');
String ipStr = String.Join <String>(".", byteStrs.Take <String>(4));
System.Net.IPAddress IP = System.Net.IPAddress.Parse(ipStr);
String[] octetStrs = { byteStrs[byteStrs.Length - 2], byteStrs[byteStrs.Length - 1] };
int port = (Int32.Parse(octetStrs[0]) * 256) + Int32.Parse(octetStrs[1]);
dataCon = new FTPConnection(IP, port);
}
