private FtpDataStream GetStream(long offset, TransferDirection dir)
{
m_parent.CheckSessionCurrentDirectory();
SessionConnected session = m_parent.FtpSession;
if (offset != 0)
{
session.ControlChannel.REST(offset);
}
FtpDataStream stream = session.ControlChannel.GetPassiveDataStream(dir);
try
{
if (dir == TransferDirection.Download)
{
session.ControlChannel.RETR(m_name);
}
else
{
session.ControlChannel.STOR(m_name);
}
}
catch (Exception)
{
stream.Dispose();
throw;
}
return(stream);
}
public FtpFile CreateFile(string newFileName)
{
FtpDataStream stream = CreateFileStream(newFileName);
stream.Close();
return((FtpFile)m_files[newFileName]);
}
internal void EndDataTransfer()
{
lock (this)
{
if (m_dataStream == null)
{
throw new InvalidOperationException();
}
m_dataStream = null;
}
}
internal void BeginDataTransfer(FtpDataStream stream)
{
lock (this)
{
if (m_dataStream != null)
{
throw new FtpDataTransferException();
}
m_dataStream = stream;
}
}
// You can only aborting file transfer started by
// BeginPutFile and BeginGetFile
override public void AbortTransfer()
{
// Save a copy of m_dataStream since it will be set
// to null when FtpDataStream call EndDataTransfer
FtpDataStream tempDataStream = m_dataStream;
if (tempDataStream != null)
{
tempDataStream.Abort();
while (!tempDataStream.IsClosed)
{
System.Threading.Thread.Sleep(0);
}
}
}
public FtpOutputDataStream CreateFileStream(string newFileName)
{
InitHashtable();
FtpDataStream stream = m_session.ControlChannel.GetPassiveDataStream(TransferDirection.Upload);
try
{
m_session.ControlChannel.STOR(newFileName);
FtpFile newFile = new FtpFile(this, newFileName);
m_files[newFileName] = newFile;
return((FtpOutputDataStream)stream);
}
catch (Exception)
{
stream.Dispose();
throw;
}
}
internal Queue List(bool passive)
{
const string errorMsgListing = "Error when listing server directory.";
try
{
Type(TransferMode.Ascii);
FtpDataStream dataStream = GetPassiveDataStream();
Queue lineQueue = new Queue();
FtpCommand("LIST");
if (m_lastResponse.Code != FtpResponse.DataChannelOpenedTransferStart &&
m_lastResponse.Code != FtpResponse.FileOkBeginOpenDataChannel)
{
throw new FtpException(errorMsgListing, m_lastResponse);
}
StreamReader lineReader = new StreamReader(dataStream, System.Text.Encoding.Default);
string line;
while ((line = lineReader.ReadLine()) != null)
{
lineQueue.Enqueue(line);
}
lineReader.Close();
if (m_lastResponse.Code != FtpResponse.ClosingDataChannel)
{
throw new FtpException(errorMsgListing, m_lastResponse);
}
return(lineQueue);
}
catch (IOException ie)
{
throw new FtpException(errorMsgListing, ie);
}
catch (SocketException se)
{
throw new FtpException(errorMsgListing, se);
}
}
internal void StartTransfer()
{
FileStream localStream = null;
FtpDataStream remoteStream = null;
try
{
m_beginEvent(this);
localStream = new FileStream(m_localFile, m_localFileOpenMode);
remoteStream = m_session.ControlChannel.GetPassiveDataStream(m_transferDirection);
m_ftpFileCommandRoutine(m_remoteFile);
m_streamCopyRoutine(remoteStream, localStream);
remoteStream.Close();
TestTransferResult();
m_endEvent(this);
}
catch (FtpUserAbortException)
{
remoteStream.Close();
throw;
}
catch (Exception)
{
m_endEvent(this);
throw;
}
finally
{
if (remoteStream != null)
{
remoteStream.Dispose();
}
if (localStream != null)
{
localStream.Close();
}
}
}
