protected override string OnProcess(string sMessage)
{
sMessage = sMessage.Trim();
// Get the dir to list
string targetToList = GetPath(sMessage);
// checks the dir name
if (!FileNameHelpers.IsValid(targetToList))
{
return(GetMessage(501, $"\"{sMessage}\" is not a valid directory name"));
}
// specify the directory tag
targetToList = FileNameHelpers.AppendDirTag(targetToList);
bool targetIsDir = ConnectionObject.FileSystemObject.DirectoryExists(targetToList);
if (!targetIsDir)
{
return(GetMessage(550, $"Directory \"{targetToList}\" not exists"));
}
#region Generate response
StringBuilder response = new StringBuilder();
string[] files = ConnectionObject.FileSystemObject.GetFiles(targetToList);
string[] directories = ConnectionObject.FileSystemObject.GetDirectories(targetToList);
if (files != null && files.Any())
{
foreach (var file in files)
{
var fileInfo = ConnectionObject.FileSystemObject.GetFileInfo(file);
response.Append(GenerateEntry(fileInfo));
response.Append("\r\n");
}
}
if (directories != null && directories.Any())
{
foreach (var dir in directories)
{
var dirInfo = ConnectionObject.FileSystemObject.GetDirectoryInfo(dir);
response.Append(GenerateEntry(dirInfo));
response.Append("\r\n");
}
}
#endregion
#region Write response
var socketData = new FtpDataSocket(ConnectionObject);
if (!socketData.Loaded)
{
return(GetMessage(425, "Unable to establish the data connection"));
}
SocketHelpers.Send(ConnectionObject.Socket, $"150 {ConnectionObject.DataType} Opening data connection for MLSD {targetToList}\r\n", ConnectionObject.Encoding);
try
{
// ToDo, send response according to ConnectionObject.DataType, i.e., Ascii or Binary
socketData.Send(response.ToString(), ConnectionObject.Encoding);
}
finally
{
socketData.Close();
}
#endregion
return(GetMessage(226, "MLSD successful"));
}
protected override string OnProcess(string sMessage)
{
sMessage = sMessage.Trim();
string[] asFiles = null;
string[] asDirectories = null;
// Get the file/dir to list
string targetToList = GetPath(sMessage);
// checks the file/dir name
if (!FileNameHelpers.IsValid(targetToList))
{
return(GetMessage(501, string.Format("\"{0}\" is not a valid file/directory name", sMessage)));
}
// two vars indicating different list results
bool targetIsFile = false;
bool targetIsDir = false;
// targetToList ends with '/', must be a directory
if (targetToList.EndsWith(@"/"))
{
targetIsFile = false;
if (ConnectionObject.FileSystemObject.DirectoryExists(targetToList))
{
targetIsDir = true;
}
}
else
{
// check whether the target to list is a directory
if (ConnectionObject.FileSystemObject.DirectoryExists(FileNameHelpers.AppendDirTag(targetToList)))
{
targetIsDir = true;
}
// check whether the target to list is a file
if (ConnectionObject.FileSystemObject.FileExists(targetToList))
{
targetIsFile = true;
}
}
if (targetIsFile)
{
asFiles = new string[1] {
targetToList
};
if (targetIsDir)
{
asDirectories = new string[1] {
FileNameHelpers.AppendDirTag(targetToList)
}
}
;
}
// list a directory
else if (targetIsDir)
{
targetToList = FileNameHelpers.AppendDirTag(targetToList);
asFiles = ConnectionObject.FileSystemObject.GetFiles(targetToList);
asDirectories = ConnectionObject.FileSystemObject.GetDirectories(targetToList);
}
else
{
return(GetMessage(550, string.Format("\"{0}\" not exists", sMessage)));
}
var socketData = new FtpDataSocket(ConnectionObject);
if (!socketData.Loaded)
{
return(GetMessage(425, "Unable to establish the data connection"));
}
// prepare to write response to data channel
SocketHelpers.Send(ConnectionObject.Socket, string.Format("150 Opening data connection for {0}\r\n", Command), ConnectionObject.Encoding);
// generate the response
string sFileList = BuildReply(asFiles, asDirectories);
// ToDo, send response according to ConnectionObject.DataType, i.e., Ascii or Binary
socketData.Send(sFileList, Encoding.UTF8);
socketData.Close();
return(GetMessage(226, string.Format("{0} successful.", Command)));
}
protected override string OnProcess(string sMessage)
{
sMessage = sMessage.Trim();
if (sMessage == "")
{
return(GetMessage(501, string.Format("{0} needs a parameter", Command)));
}
string sFilePath = GetPath(sMessage);
if (!ConnectionObject.FileSystemObject.FileExists(sFilePath))
{
return(GetMessage(550, string.Format("File \"{0}\" doesn't exist", sMessage)));
}
var socketData = new FtpDataSocket(ConnectionObject);
if (!socketData.Loaded)
{
return(GetMessage(425, "Unable to establish the data connection"));
}
SocketHelpers.Send(ConnectionObject.Socket, "150 Starting data transfer, please wait...\r\n", ConnectionObject.Encoding);
IFile file = ConnectionObject.FileSystemObject.OpenFile(sFilePath, false);
if (file == null)
{
return(GetMessage(550, "Couldn't open file"));
}
// TYPE I, default
if (ConnectionObject.DataType == DataType.Image)
{
var abBuffer = new byte[m_nBufferSize];
int nRead = file.Read(abBuffer, m_nBufferSize);
while (nRead > 0 && socketData.Send(abBuffer, nRead))
{
nRead = file.Read(abBuffer, m_nBufferSize);
}
}
// TYPE A
else if (ConnectionObject.DataType == DataType.Ascii)
{
int writeSize = SocketHelpers.CopyStreamAscii(file.BlobStream, socketData.Socket.GetStream(), m_nBufferSize);
FtpServerMessageHandler.SendMessage(ConnectionObject.Id, string.Format("Use ascii type success, write {0} chars!", writeSize));
}
else // mustn't reach
{
file.Close();
socketData.Close();
return(GetMessage(451, "Error in transfer data: invalid data type."));
}
file.Close();
socketData.Close();
return(GetMessage(226, "File download succeeded."));
}
protected override string OnProcess(string sMessage)
{
sMessage = sMessage.Trim();
if (sMessage == "")
{
return(GetMessage(501, $"{Command} needs a parameter"));
}
string sFilePath = GetPath(sMessage);
Trace.TraceInformation($"RETR {sFilePath} - BEGIN");
Stopwatch sw = new Stopwatch();
sw.Start();
if (!ConnectionObject.FileSystemObject.FileExists(sFilePath))
{
FtpServer.LogWrite(this, sMessage, 550, sw.ElapsedMilliseconds);
return(GetMessage(550, $"File \"{sMessage}\" doesn't exist"));
}
var socketData = new FtpDataSocket(ConnectionObject);
IFile file = null;
try
{
if (!socketData.Loaded)
{
FtpServer.LogWrite(this, sMessage, 425, sw.ElapsedMilliseconds);
return(GetMessage(425, "Unable to establish the data connection"));
}
SocketHelpers.Send(ConnectionObject.Socket, "150 Starting data transfer, please wait...\r\n",
ConnectionObject.Encoding);
file = ConnectionObject.FileSystemObject.OpenFile(sFilePath, false);
if (file == null)
{
return(GetMessage(550, "Couldn't open file"));
}
// TYPE I, default
if (ConnectionObject.DataType == DataType.Image)
{
var abBuffer = new byte[m_nBufferSize];
int nRead = file.Read(abBuffer, m_nBufferSize);
while (nRead > 0 && socketData.Send(abBuffer, nRead))
{
nRead = file.Read(abBuffer, m_nBufferSize);
}
}
// TYPE A
else if (ConnectionObject.DataType == DataType.Ascii)
{
int writeSize = SocketHelpers.CopyStreamAscii(file.BlobStream, socketData.Socket.GetStream(),
m_nBufferSize);
FtpServerMessageHandler.SendMessage(ConnectionObject.Id,
$"Use ascii type success, write {writeSize} chars!");
}
else // mustn't reach
{
file.Close();
socketData.Close();
FtpServer.LogWrite(this, sMessage, 451, sw.ElapsedMilliseconds);
return(GetMessage(451, "Error in transfer data: invalid data type."));
}
sw.Stop();
Trace.TraceInformation($"RETR {sFilePath} - END, Time {sw.ElapsedMilliseconds} ms");
FtpServer.LogWrite(this, sMessage, 226, sw.ElapsedMilliseconds);
return(GetMessage(226, $"File download succeeded. Time {sw.ElapsedMilliseconds} ms"));
}
finally
{
file?.Close();
socketData.Close();
}
}