public IEnumerable <FtpListItem> GetListing(string path)
{
IEnumerable <string> rawListing;
FtpListType ftpListType;
lock (this._lockControlComplexSocket)
{
{
var success = this.EnsureConnection();
if (!success)
{
return(Enumerable.Empty <FtpListItem>());
}
}
string command;
if (this.FtpFeatures.HasFlag(FtpFeatures.MLSD))
{
ftpListType = FtpListType.MLSD;
command = "MLSD";
}
else if (this.FtpFeatures.HasFlag(FtpFeatures.MLST))
{
ftpListType = FtpListType.MLST;
command = "MLST";
}
else
{
// TODO check if really *always* available
ftpListType = FtpListType.LIST;
command = "LIST";
}
var concreteCommand = string.Format("{0} {1}",
command,
path);
var controlComplexSocket = this._controlComplexSocket;
if (this.FtpFeatures.HasFlag(FtpFeatures.PRET))
{
// On servers that advertise PRET (DrFTPD), the PRET command must be executed before a passive connection is opened.
{
var success = controlComplexSocket.Send(string.Format("PRET {0}",
concreteCommand),
this.Encoding,
this.SendTimeout);
if (!success)
{
return(Enumerable.Empty <FtpListItem>());
}
}
{
var complexResult = controlComplexSocket.Receive(this.Encoding,
this.ReceiveTimeout);
var success = complexResult.Success;
if (!success)
{
return(Enumerable.Empty <FtpListItem>());
}
}
}
{
var transferComplexSocket = this.GetPassiveComplexSocket();
if (transferComplexSocket == null)
{
return(Enumerable.Empty <FtpListItem>());
}
using (transferComplexSocket)
{
{
// send LIST/MLSD/MLST-command via control socket
{
var success = controlComplexSocket.Send(concreteCommand,
this.Encoding,
this.SendTimeout);
if (!success)
{
return(Enumerable.Empty <FtpListItem>());
}
}
{
var complexResult = controlComplexSocket.Receive(this.Encoding,
this.ReceiveTimeout);
var success = complexResult.Success;
if (!success)
{
return(Enumerable.Empty <FtpListItem>());
}
}
}
{
// receive listing via transfer socket
var connected = transferComplexSocket.Connect(this.ConnectTimeout);
if (!connected)
{
return(Enumerable.Empty <FtpListItem>());
}
var complexResult = transferComplexSocket.Receive(this.Encoding,
this.ReceiveTimeout);
// TODO check if there's a need to check against FtpReply.Success or anything alike!
rawListing = complexResult.Messages;
}
}
}
}
var ftpListItems = FtpListItem.ParseList(rawListing,
ftpListType);
return(ftpListItems);
}