DokanError IDokanOperations.FindFiles(string fileName, out IList <FileInformation> files, DokanFileInfo info)
{
Log("FindFiles:{0}", fileName);
var dircache = _cache.Get(fileName) as Tuple <DateTime, IList <FileInformation> >;
if (dircache != null)
{
files = (dircache).Item2;
Log("CacheHit:{0}", fileName);
return(DokanError.ErrorSuccess);
}
byte[] handle;
try
{
handle = _sftpSession.RequestOpenDir(GetUnixPath(fileName));
}
catch (SftpPermissionDeniedException)
{
files = null;
return(DokanError.ErrorAccessDenied);
}
files = new List <FileInformation>();
for (var sftpFiles = _sftpSession.RequestReadDir(handle);
sftpFiles != null;
sftpFiles = _sftpSession.RequestReadDir(handle))
{
(files as List <FileInformation>).AddRange(sftpFiles.Select(
file =>
{
var sftpFileAttributes = file.Value;
if (sftpFileAttributes.IsSymbolicLink)
{
sftpFileAttributes = _sftpSession.RequestStat(
GetUnixPath(String.Format("{0}{1}", fileName, file.Key)), true) ??
file.Value;
}
var fileInformation = new FileInformation
{
Attributes =
FileAttributes.NotContentIndexed,
CreationTime
=
sftpFileAttributes
.
LastWriteTime,
FileName
=
file.Key
,
LastAccessTime
=
sftpFileAttributes
.
LastAccessTime,
LastWriteTime
=
sftpFileAttributes
.
LastWriteTime,
Length
=
sftpFileAttributes
.
Size
};
if (sftpFileAttributes.IsDirectory)
{
fileInformation.Attributes
|=
FileAttributes.
Directory;
fileInformation.Length = 0;
}
else
{
fileInformation.Attributes |= FileAttributes.Normal;
}
if (file.Key[0] == '.')
{
fileInformation.Attributes
|=
FileAttributes.
Hidden;
}
if (
!UserCanWrite(
sftpFileAttributes))
{
fileInformation.Attributes
|=
FileAttributes.
ReadOnly;
}
if (_useOfflineAttribute)
{
fileInformation.Attributes
|=
FileAttributes.
Offline;
}
return(fileInformation);
}));
int timeout = Math.Max(_attributeCacheTimeout + 2, _attributeCacheTimeout + sftpFiles.Length / 10);
foreach (
var file in
sftpFiles.Where(
pair => !pair.Value.IsSymbolicLink))
{
_cache.Set(GetUnixPath(String.Format("{0}{1}", fileName, file.Key)), file.Value,
DateTimeOffset.UtcNow.AddSeconds(timeout));
}
}
_sftpSession.RequestClose(handle);
_cache.Add(fileName, new Tuple <DateTime, IList <FileInformation> >(
(info.Context as SftpContext).Attributes.LastWriteTime,
files),
DateTimeOffset.UtcNow.AddSeconds(Math.Max(_attributeCacheTimeout,
Math.Min(files.Count, _directoryCacheTimeout))));
return(DokanError.ErrorSuccess);
}
