protected SftpFileAttributes ReadAttributes()
{
var flag = this.ReadUInt32();
long size = -1;
int userId = -1;
int groupId = -1;
uint permissions = 0;
var accessTime = DateTime.MinValue;
var modifyTime = DateTime.MinValue;
IDictionary <string, string> extensions = null;
if ((flag & 0x00000001) == 0x00000001) // SSH_FILEXFER_ATTR_SIZE
{
size = (long)this.ReadUInt64();
}
if ((flag & 0x00000002) == 0x00000002) // SSH_FILEXFER_ATTR_UIDGID
{
userId = (int)this.ReadUInt32();
groupId = (int)this.ReadUInt32();
}
if ((flag & 0x00000004) == 0x00000004) // SSH_FILEXFER_ATTR_PERMISSIONS
{
permissions = this.ReadUInt32();
}
if ((flag & 0x00000008) == 0x00000008) // SSH_FILEXFER_ATTR_ACMODTIME
{
var time = this.ReadUInt32();
accessTime = DateTime.FromFileTime((time + 11644473600) * 10000000);
time = this.ReadUInt32();
modifyTime = DateTime.FromFileTime((time + 11644473600) * 10000000);
}
if ((flag & 0x80000000) == 0x80000000) // SSH_FILEXFER_ATTR_ACMODTIME
{
var extendedCount = this.ReadUInt32();
extensions = this.ReadExtensionPair();
}
var attributes = new SftpFileAttributes(accessTime, modifyTime, size, userId, groupId, permissions, extensions);
return(attributes);
}
/// <summary>
/// Performs SSH_FXP_FSETSTAT request.
/// </summary>
/// <param name="handle">The handle.</param>
/// <param name="attributes">The attributes.</param>
internal void RequestFSetStat(byte[] handle, SftpFileAttributes attributes)
{
SshException exception = null;
using (var wait = new AutoResetEvent(false))
{
var request = new SftpFSetStatRequest(this.ProtocolVersion, this.NextRequestId, handle, attributes,
(response) =>
{
exception = this.GetSftpException(response);
wait.Set();
});
this.SendRequest(request);
this.WaitHandle(wait, this._operationTimeout);
}
if (exception != null)
{
throw exception;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="SftpFile"/> class.
/// </summary>
/// <param name="sftpSession">The SFTP session.</param>
/// <param name="fullName">Full path of the directory or file.</param>
/// <param name="attributes">Attributes of the directory or file.</param>
/// <exception cref="ArgumentNullException"><paramref name="sftpSession"/> or <paramref name="fullName"/> is null.</exception>
internal SftpFile(SftpSession sftpSession, string fullName, SftpFileAttributes attributes)
{
if (sftpSession == null)
{
throw new SshConnectionException("Client not connected.");
}
if (attributes == null)
{
throw new ArgumentNullException("attributes");
}
if (fullName == null)
{
throw new ArgumentNullException("fullName");
}
this._sftpSession = sftpSession;
this.Attributes = attributes;
this.Name = fullName.Substring(fullName.LastIndexOf('/') + 1);
this.FullName = fullName;
}
protected void Write(SftpFileAttributes attributes)
{
if (attributes == null)
{
this.Write((uint)0);
return;
}
else
{
UInt32 flag = 0;
if (attributes.IsSizeChanged && attributes.IsRegularFile)
{
flag |= 0x00000001;
}
if (attributes.IsUserIdChanged || attributes.IsGroupIdChanged)
{
flag |= 0x00000002;
}
if (attributes.IsPermissionsChanged)
{
flag |= 0x00000004;
}
if (attributes.IsLastAccessTimeChanged || attributes.IsLastWriteTimeChanged)
{
flag |= 0x00000008;
}
if (attributes.IsExtensionsChanged)
{
flag |= 0x80000000;
}
this.Write(flag);
if (attributes.IsSizeChanged && attributes.IsRegularFile)
{
this.Write((UInt64)attributes.Size);
}
if (attributes.IsUserIdChanged || attributes.IsGroupIdChanged)
{
this.Write((UInt32)attributes.UserId);
this.Write((UInt32)attributes.GroupId);
}
if (attributes.IsPermissionsChanged)
{
this.Write(attributes.Permissions);
}
if (attributes.IsLastAccessTimeChanged || attributes.IsLastWriteTimeChanged)
{
uint time = (uint)(attributes.LastAccessTime.ToFileTime() / 10000000 - 11644473600);
this.Write(time);
time = (uint)(attributes.LastWriteTime.ToFileTime() / 10000000 - 11644473600);
this.Write(time);
}
if (attributes.IsExtensionsChanged)
{
this.Write(attributes.Extensions);
}
}
}
/// <summary>
/// Sets the position within the current stream.
/// </summary>
/// <param name="offset">A byte offset relative to the <paramref name="origin"/> parameter.</param>
/// <param name="origin">A value of type <see cref="T:System.IO.SeekOrigin"/> indicating the reference point used to obtain the new position.</param>
/// <returns>
/// The new position within the current stream.
/// </returns>
/// <exception cref="T:System.IO.IOException">An I/O error occurs. </exception>
///
/// <exception cref="T:System.NotSupportedException">The stream does not support seeking, such as if the stream is constructed from a pipe or console output. </exception>
///
/// <exception cref="T:System.ObjectDisposedException">Methods were called after the stream was closed. </exception>
public override long Seek(long offset, SeekOrigin origin)
{
long newPosn = -1;
// Bail out if this stream is not capable of seeking.
if (!this._canSeek)
{
throw new NotSupportedException("Seek is not supported.");
}
// Lock down the file stream while we do this.
lock (this._lock)
{
// Bail out if the handle is invalid.
if (this._handle == null)
{
throw new ObjectDisposedException("Stream is closed.");
}
// Don't do anything if the position won't be moving.
if (origin == SeekOrigin.Begin && offset == this._position)
{
return(offset);
}
else if (origin == SeekOrigin.Current && offset == 0)
{
return(this._position);
}
this._attributes = this._session.RequestFStat(this._handle);
// The behaviour depends upon the read/write mode.
if (this._bufferOwnedByWrite)
{
// Flush the write buffer and then seek.
this.FlushWriteBuffer();
switch (origin)
{
case SeekOrigin.Begin:
newPosn = offset;
break;
case SeekOrigin.Current:
newPosn = this._position + offset;
break;
case SeekOrigin.End:
newPosn = this._attributes.Size - offset;
break;
default:
break;
}
if (newPosn == -1)
{
throw new EndOfStreamException("End of stream.");
}
this._position = newPosn;
this._serverFilePosition = (ulong)newPosn;
}
else
{
// Determine if the seek is to somewhere inside
// the current read buffer bounds.
if (origin == SeekOrigin.Begin)
{
newPosn = this._position - this._bufferPosn;
if (offset >= newPosn && offset <
(newPosn + this._bufferLen))
{
this._bufferPosn = (int)(offset - newPosn);
this._position = offset;
return(this._position);
}
}
else if (origin == SeekOrigin.Current)
{
newPosn = this._position + offset;
if (newPosn >= (this._position - this._bufferPosn) &&
newPosn < (this._position - this._bufferPosn + this._bufferLen))
{
this._bufferPosn =
(int)(newPosn - (this._position - this._bufferPosn));
this._position = newPosn;
return(this._position);
}
}
// Abandon the read buffer.
this._bufferPosn = 0;
this._bufferLen = 0;
// Seek to the new position.
switch (origin)
{
case SeekOrigin.Begin:
newPosn = offset;
break;
case SeekOrigin.Current:
newPosn = this._position + offset;
break;
case SeekOrigin.End:
newPosn = this._attributes.Size - offset;
break;
default:
break;
}
if (newPosn < 0)
{
throw new EndOfStreamException();
}
this._position = newPosn;
}
return(this._position);
}
}
internal SftpFileStream(SftpSession session, string path, FileMode mode, FileAccess access, int bufferSize, bool useAsync)
{
// Validate the parameters.
if (session == null)
{
throw new SshConnectionException("Client not connected.");
}
if (path == null)
{
throw new ArgumentNullException("path");
}
if (bufferSize <= 0 || bufferSize > 16 * 1024)
{
throw new ArgumentOutOfRangeException("bufferSize");
}
if (access < FileAccess.Read || access > FileAccess.ReadWrite)
{
throw new ArgumentOutOfRangeException("access");
}
if (mode < FileMode.CreateNew || mode > FileMode.Append)
{
throw new ArgumentOutOfRangeException("mode");
}
this.Timeout = TimeSpan.FromSeconds(30);
this.Name = path;
// Initialize the object state.
this._session = session;
this._access = access;
this._ownsHandle = true;
this._isAsync = useAsync;
this._path = path;
this._bufferSize = bufferSize;
this._buffer = new byte[bufferSize];
this._bufferPosn = 0;
this._bufferLen = 0;
this._bufferOwnedByWrite = false;
this._canSeek = true;
this._position = 0;
this._serverFilePosition = 0;
this._session.Disconnected += Session_Disconnected;
var flags = Flags.None;
switch (access)
{
case FileAccess.Read:
flags |= Flags.Read;
break;
case FileAccess.Write:
flags |= Flags.Write;
break;
case FileAccess.ReadWrite:
flags |= Flags.Read;
flags |= Flags.Write;
break;
default:
break;
}
switch (mode)
{
case FileMode.Append:
flags |= Flags.Append;
break;
case FileMode.Create:
this._handle = this._session.RequestOpen(path, flags | Flags.Truncate, true);
if (this._handle == null)
{
flags |= Flags.CreateNew;
}
else
{
flags |= Flags.Truncate;
}
break;
case FileMode.CreateNew:
flags |= Flags.CreateNew;
break;
case FileMode.Open:
break;
case FileMode.OpenOrCreate:
flags |= Flags.CreateNewOrOpen;
break;
case FileMode.Truncate:
flags |= Flags.Truncate;
break;
default:
break;
}
if (this._handle == null)
{
this._handle = this._session.RequestOpen(this._path, flags);
}
this._attributes = this._session.RequestFStat(this._handle);
if (mode == FileMode.Append)
{
this._position = this._attributes.Size;
this._serverFilePosition = (ulong)this._attributes.Size;
}
}
