/// <summary>
/// Disconnect from the FTP server
/// </summary>
public void Disconnect()
{
if (m_cmdsocket != null)
{
FTPResponse response = SendCommand("QUIT");
m_cmdsocket.Close();
m_cmdsocket = null;
}
m_server = FTPServerType.Unknown;
m_connected = false;
}
private FTPResponse ReadResponse()
{
lock (m_cmdsocket)
{
FTPResponse response = new FTPResponse();
string responsetext = "";
int bytesrecvd = 0;
// make sure any command sent has enough time to respond
Thread.Sleep(750);
for (; m_cmdsocket.Available > 0;)
{
bytesrecvd = m_cmdsocket.Receive(m_buffer, m_buffer.Length, 0);
responsetext += Encoding.ASCII.GetString(m_buffer, 0, bytesrecvd);
}
if (responsetext.Length == 0)
{
response.ID = 0;
response.Text = "";
return(response);
}
string[] message = responsetext.Replace("\r", "").Split('\n');
// we may have multiple responses,
// particularly if retriving small amounts of data like directory listings
// such as the command sent and transfer complete together
// a response may also have multiple lines
for (int m = 0; m < message.Length; m++)
{
try
{
// is the first line a response? If so, the first 3 characters
// are the response ID number
FTPResponse resp = new FTPResponse();
if (message[m].Length > 0)
{
try
{
resp.ID = int.Parse(message[m].Substring(0, 3));
}
catch (Exception)
{
resp.ID = 0;
}
resp.Text = message[m].Substring(4);
if (ResponseReceived != null)
{
foreach (FTPResponseHandler rh in ResponseReceived.GetInvocationList())
{
try
{
rh(this, resp);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(string.Format("FTPResponseHandler threw {0}\r\n{1}", ex.GetType().Name, ex.Message));
// if any event handler fails, we ignore it
}
}
}
if (m == 0)
{
response = resp;
}
}
}
catch (Exception)
{
continue;
}
return(response);
}
// return the first response received
return(response);
}
}