private async Task CommandListAsync(string parameter)
{
if (!authenticated)
{
await ReplyAsync(FtpReplyCode.NotLoggedIn, "You need to log in first");
return;
}
MemoryStream stream = new MemoryStream();
var writer = new StreamWriter(stream, encoding);
writer.NewLine = "\r\n";
try
{
var listing = await fileProvider.GetListingAsync(parameter);
await writer.WriteLineAsync();
foreach (var item in listing)
{
if (listFormat == ListFormat.Unix)
{
await writer.WriteLineAsync(
string.Format(
"{0}{1}{1}{1} 1 owner group {2,15} {3} {4}",
item.IsDirectory ? 'd' : '-',
item.IsReadOnly ? "r-x" : "rwx",
item.Length,
item.LastWriteTime.ToString(
item.LastWriteTime.Year == DateTime.Now.Year ?
"MMM dd HH:mm" : "MMM dd yyyy", CultureInfo.InvariantCulture),
item.Name));
}
else if (listFormat == ListFormat.MsDos)
{
if (item.IsDirectory)
{
await writer.WriteLineAsync(
string.Format(
CultureInfo.InvariantCulture,
"{0:MM-dd-yy hh:mmtt} {1,20} {2}",
item.LastWriteTime,
item.Length,
item.Name));
}
else
{
await writer.WriteLineAsync(
string.Format(
CultureInfo.InvariantCulture,
"{0:MM-dd-yy hh:mmtt} {1,-14} {2}",
item.LastWriteTime,
"<DIR>",
item.Name));
}
}
else
{
throw new NotSupportedException("Can't only use Unix or MS-DOS listing format.");
}
}
}
catch (FileBusyException ex)
{
await ReplyAsync(FtpReplyCode.FileBusy, string.Format("File temporarily unavailable: {0}", ex.Message));
return;
}
catch (FileNoAccessException ex)
{
await ReplyAsync(FtpReplyCode.FileNoAccess, string.Format("File access denied: {0}", ex.Message));
return;
}
writer.Flush();
stream.Seek(0, SeekOrigin.Begin);
await OpenDataConnectionAsync();
await dataConnection.SendAsync(stream);
await dataConnection.DisconnectAsync();
await ReplyAsync(FtpReplyCode.SuccessClosingDataConnection, "Listing has been sent");
return;
}