/// <summary>
/// Processes the list.
/// </summary>
/// <param name="session">The handle.</param>
/// <param name="path">The path.</param>
/// <returns></returns>
private static IList <string> ProcessList(FtpSession session, FtpPath path)
{
// Open data channel
using (var dataStream = OpenDataStream(session, FtpTransferMode.Binary, FtpStreamMode.Read))
{
// then command is sent
var reply = session.Expect(session.SendCommand("LIST", session.Connection.Client.GetPlatform(session).EscapePath(path.ToString())), 125, 150, 425);
if (!reply.Code.IsSuccess)
{
dataStream.Abort();
session.ThrowException(reply);
}
using (var streamReader = new StreamReader(dataStream.Validated(), session.Connection.Encoding))
{
var list = new List <string>();
for (;;)
{
var line = streamReader.ReadLine();
if (line == null)
{
break;
}
list.Add(line);
}
return(list);
}
}
}
/// <summary>
/// Gets the platform.
/// </summary>
/// <param name="session">The FTP session.</param>
/// <returns></returns>
public FtpPlatform GetPlatform(FtpSession session)
{
if (_platform == null)
{
_platform = GetFtpPlatform(GetServerType(session), GetSystem(session));
}
return(_platform);
}
/// <summary>
/// Processes the specified action with a session.
/// </summary>
/// <typeparam name="TResult">The type of the ret.</typeparam>
/// <param name="action">The action.</param>
/// <param name="session">An existing session or null to create a new one.</param>
/// <returns></returns>
public TResult Process <TResult>(Func <FtpSession, TResult> action, FtpSession session = null)
{
if (session != null)
{
return(action(session));
}
using (var newSession = Session())
return(action(newSession));
}
/// <summary>
/// Gets the system.
/// </summary>
/// <param name="session">The FTP session.</param>
/// <returns></returns>
public string GetSystem(FtpSession session)
{
if (_system == null)
{
var systemReply = Process(s => s.Expect(s.SendCommand("SYST"), 215), session);
_system = systemReply.Lines[0];
}
return(_system);
}
/// <summary>
/// Processes the specified action with a session.
/// </summary>
/// <param name="action">The action.</param>
/// <param name="session">An existing session or null to create a new one.</param>
public void Process(Action <FtpSession> action, FtpSession session = null)
{
if (session != null)
{
action(session);
}
else
{
using (var newSession = Session())
action(newSession);
}
}
/// <summary>
/// Processes the stor.
/// </summary>
/// <param name="session">The handle.</param>
/// <param name="path">The path.</param>
/// <param name="mode">The mode.</param>
/// <returns></returns>
/// <exception cref="IOException"></exception>
private static Stream ProcessStor(FtpSession session, FtpPath path, FtpTransferMode mode = FtpTransferMode.Binary)
{
var stream = OpenDataStream(session, mode, FtpStreamMode.Write);
var reply = session.Expect(session.SendCommand("STOR", path.ToString()), 125, 150, 425, 550);
if (!reply.Code.IsSuccess)
{
stream.Abort();
session.ThrowException(reply);
return(null);
}
return(stream.Validated());
}
/// <summary>
/// Loads the features.
/// </summary>
/// <param name="session">The session.</param>
/// <returns></returns>
private static FtpServerFeatures LoadServerFeatures(FtpSession session)
{
var featuresReply = session.SendCommand("FEAT");
if (featuresReply.Code == 211)
{
var featuresQuery = from line in featuresReply.Lines.Skip(1).Take(featuresReply.Lines.Length - 2)
select line.Trim();
return(new FtpServerFeatures(featuresQuery));
}
return(new FtpServerFeatures(new string[0]));
}
private static FtpEntry ProcessGetEntry(FtpSession session, FtpPath path)
{
session.CheckProtection(FtpProtection.ControlChannel);
var reply = session.SendCommand("STAT", session.Connection.Client.GetPlatform(session).EscapePath(path.ToString()));
if ((reply.Code != 213 && reply.Code != 211) || reply.Lines.Length <= 2)
{
return(null);
}
// now get the type: the first entry is "." for folders or file itself for files/links
var entry = EnumerateEntries(session.Connection.Client, path, reply.Lines.Skip(1), ignoreSpecialEntries: false).First();
// actually, it's always good here
return(new FtpEntry(path, entry.Size, entry.Type, entry.Date, entry.Target));
}
/// <summary>
/// Gets the features.
/// </summary>
/// <param name="session">The session.</param>
/// <returns></returns>
private FtpServerFeatures GetServerFeatures(FtpSession session)
{
if (_serverFeatures == null)
{
if (session != null)
{
_serverFeatures = LoadServerFeatures(session);
}
else
{
using (var newSession = Session())
_serverFeatures = LoadServerFeatures(newSession);
}
}
return(_serverFeatures);
}
/// <summary>
/// Gets the type of the server.
/// </summary>
/// <param name="session">The FTP session.</param>
/// <returns></returns>
private FtpServerType GetServerType(FtpSession session)
{
if (!_serverType.HasValue)
{
var system = GetSystem(session);
if (system.StartsWith("unix", StringComparison.InvariantCultureIgnoreCase))
{
_serverType = FtpServerType.Unix;
}
else if (system.StartsWith("windows", StringComparison.InvariantCultureIgnoreCase))
{
_serverType = FtpServerType.Windows;
}
else
{
_serverType = FtpServerType.Unknown;
}
}
return(_serverType.Value);
}
/// <summary>
/// Opens a data stream.
/// </summary>
/// <param name="session">The session handle.</param>
/// <param name="transferMode">The mode.</param>
/// <param name="streamMode">The stream mode.</param>
/// <returns></returns>
public static FtpStream OpenDataStream(this FtpSession session, FtpTransferMode transferMode, FtpStreamMode streamMode)
{
var client = session.Connection.Client;
return(session.OpenDataStream(client.Passive, client.ConnectTimeout, client.ReadWriteTimeout, transferMode, streamMode));
}
/// <summary>
/// Determines whether the specified feature has a requested feature.
/// </summary>
/// <param name="feature">The feature.</param>
/// <param name="session">The session.</param>
/// <returns>
/// <c>true</c> if the specified feature has feature; otherwise, <c>false</c>.
/// </returns>
internal bool HasServerFeature(string feature, FtpSession session)
{
return(GetServerFeatures(session).HasFeature(feature));
}
/// <summary>
/// Initializes a new instance of the <see cref="FtpSessionHandle"/> class.
/// </summary>
/// <param name="ftpSession">The FTP session.</param>
internal FtpSessionHandle(FtpSession ftpSession)
{
Session = ftpSession;
Session.AddReference();
}
