public bool Exists(string path)
{
CheckDisposed();
if (path.IsNullOrWhiteSpace())
throw new ArgumentException("path");
if (_sftpSession == null)
throw new SshConnectionException("Client not connected.");
var fullPath = _sftpSession.GetCanonicalPath(path);
// using SSH_FXP_REALPATH is not an alternative the SFTP specification has not always
// been clear on how the server should respond when the specified path is not present
// on the server:
//
// SSH 1 to 4:
// No mention of how the server should respond if the path is not present on the server.
//
// SSH 5:
// The server SHOULD fail the request if the path is not present on the server.
//
// SSH 6:
// Draft 06: The server SHOULD fail the request if the path is not present on the server.
// Draft 07 to 13: The server MUST NOT fail the request if the path does not exist.
//
// Note that SSH 6 (draft 06 and forward) allows for more control options, but we
// currently only support up to v3.
try
{
_sftpSession.RequestLStat(fullPath);
return true;
}
catch (SftpPathNotFoundException)
{
return false;
}
}
public bool UploadFile(string filePath)
{
ConnectionInfo connectionInfo = new PasswordConnectionInfo(_address, ConstFields.SFTP_PORT, _username, _password);
try
{
using (var sftp = new SftpClient(connectionInfo))
{
sftp.Connect();
using (var file = File.OpenRead(filePath))
{
if (!sftp.Exists(ConstFields.TEMP_PRINT_DIRECTORY))
{
sftp.CreateDirectory(ConstFields.TEMP_PRINT_DIRECTORY);
}
sftp.ChangeDirectory(ConstFields.TEMP_PRINT_DIRECTORY);
string filename = Path.GetFileName(filePath);
sftp.UploadFile(file, filename);
}
sftp.Disconnect();
}
}
catch (Renci.SshNet.Common.SshConnectionException)
{
Console.WriteLine("Cannot connect to the server.");
return false;
}
catch (System.Net.Sockets.SocketException)
{
Console.WriteLine("Unable to establish the socket.");
return false;
}
catch (Renci.SshNet.Common.SshAuthenticationException)
{
Console.WriteLine("Authentication of SSH session failed.");
return false;
}
return true;
}
