private async Task <FtpResponse> ExecuteSendAsync(
TcpClient responseSocket,
Stack <IUnixDirectoryEntry> path,
IUnixDirectoryEntry dirEntry,
CancellationToken cancellationToken)
{
var encoding = Data.NlstEncoding ?? Connection.Encoding;
using (var stream = await Connection.CreateEncryptedStream(responseSocket.GetStream()).ConfigureAwait(false))
{
using (var writer = new StreamWriter(stream, encoding, 4096, true)
{
NewLine = "\r\n",
})
{
var entries = await Data.FileSystem.GetEntriesAsync(dirEntry, cancellationToken).ConfigureAwait(false);
var enumerator = new DirectoryListingEnumerator(entries, Data.FileSystem, path, true);
var formatter = new FactsListFormatter(Data.User, enumerator, Data.ActiveMlstFacts, false);
while (enumerator.MoveNext())
{
var name = enumerator.Name;
var entry = enumerator.Entry;
var line = formatter.Format(entry, name);
Connection.Log?.LogDebug(line);
await writer.WriteLineAsync(line).ConfigureAwait(false);
}
await writer.FlushAsync().ConfigureAwait(false);
}
await stream.FlushAsync(cancellationToken).ConfigureAwait(false);
}
// Use 250 when the connection stays open.
return(new FtpResponse(226, "Closing data connection."));
}
private async Task <FtpResponse> ProcessMlstAsync(FtpCommand command, CancellationToken cancellationToken)
{
var argument = command.Argument;
var path = Data.Path.Clone();
IUnixFileSystemEntry targetEntry;
if (string.IsNullOrEmpty(argument))
{
targetEntry = path.Count == 0 ? Data.FileSystem.Root : path.Peek();
}
else
{
var foundEntry = await Data.FileSystem.SearchEntryAsync(path, argument, cancellationToken).ConfigureAwait(false);
if (foundEntry?.Entry == null)
{
return(new FtpResponse(550, "File system entry not found."));
}
targetEntry = foundEntry.Entry;
}
await Connection.WriteAsync($"250- {targetEntry.Name}", cancellationToken).ConfigureAwait(false);
var entries = new List <IUnixFileSystemEntry>()
{
targetEntry,
};
var enumerator = new DirectoryListingEnumerator(entries, Data.FileSystem, path, false);
var formatter = new FactsListFormatter(Data.User, enumerator, Data.ActiveMlstFacts, true);
while (enumerator.MoveNext())
{
var name = enumerator.Name;
var entry = enumerator.Entry;
var line = formatter.Format(entry, name);
await Connection.WriteAsync($" {line}", cancellationToken).ConfigureAwait(false);
}
return(new FtpResponse(250, "End"));
}
private async Task <IFtpResponse?> ExecuteSendAsync(
IFtpDataConnection dataConnection,
ClaimsPrincipal user,
IUnixFileSystem fileSystem,
Stack <IUnixDirectoryEntry> path,
IUnixDirectoryEntry dirEntry,
IMlstFactsFeature factsFeature,
CancellationToken cancellationToken)
{
var encoding = Connection.Features.Get <IEncodingFeature>().Encoding;
var stream = dataConnection.Stream;
using (var writer = new StreamWriter(stream, encoding, 4096, true)
{
NewLine = "\r\n",
})
{
var entries = await fileSystem.GetEntriesAsync(dirEntry, cancellationToken).ConfigureAwait(false);
var enumerator = new DirectoryListingEnumerator(entries, fileSystem, path, true);
var formatter = new FactsListFormatter(user, enumerator, factsFeature.ActiveMlstFacts, false);
while (enumerator.MoveNext())
{
var name = enumerator.Name;
var entry = enumerator.Entry;
var line = formatter.Format(entry, name);
_logger?.LogTrace(line);
await writer.WriteLineAsync(line).ConfigureAwait(false);
}
await writer.FlushAsync().ConfigureAwait(false);
}
// Use 250 when the connection stays open.
return(new FtpResponse(226, T("Closing data connection.")));
}
private async Task <FtpResponse> ProcessMlsdAsync(FtpCommand command, CancellationToken cancellationToken)
{
var argument = command.Argument;
var path = Data.Path.Clone();
IUnixDirectoryEntry dirEntry;
if (string.IsNullOrEmpty(argument))
{
dirEntry = path.Count == 0 ? Data.FileSystem.Root : path.Peek();
}
else
{
var foundEntry = await Data.FileSystem.SearchEntryAsync(path, argument, cancellationToken);
if (foundEntry?.Entry == null)
{
return(new FtpResponse(550, "File system entry not found."));
}
dirEntry = foundEntry.Entry as IUnixDirectoryEntry;
if (dirEntry == null)
{
return(new FtpResponse(501, "Not a directory."));
}
if (!dirEntry.IsRoot)
{
path.Push(dirEntry);
}
}
await Connection.WriteAsync(new FtpResponse(150, "Opening data connection."), cancellationToken);
ITcpSocketClient responseSocket;
try
{
responseSocket = await Connection.CreateResponseSocket();
}
catch (Exception)
{
return(new FtpResponse(425, "Can't open data connection."));
}
try
{
var encoding = Data.NlstEncoding ?? Connection.Encoding;
using (var stream = await Connection.CreateEncryptedStream(responseSocket.WriteStream))
{
using (var writer = new StreamWriter(stream, encoding, 4096, true)
{
NewLine = "\r\n",
})
{
var entries = await Data.FileSystem.GetEntriesAsync(dirEntry, cancellationToken);
var enumerator = new DirectoryListingEnumerator(entries, Data.FileSystem, path, true);
var formatter = new FactsListFormatter(Data.User, enumerator, Data.ActiveMlstFacts, false);
while (enumerator.MoveNext())
{
var name = enumerator.Name;
var entry = enumerator.Entry;
var line = formatter.Format(entry, name);
Connection.Log?.Debug(line);
await writer.WriteLineAsync(line);
}
await writer.FlushAsync();
}
await stream.FlushAsync(cancellationToken);
}
}
finally
{
responseSocket.Dispose();
}
// Use 250 when the connection stays open.
return(new FtpResponse(226, "Closing data connection."));
}