(Delphi DLL) SFTP Fsync -- Flush an Open File on the Server

Demonstrates how to flush the contents of an open file on the server. This example only works for servers that implement the fsync@openssh.com extension.

Note: This example requires Chilkat v9.5.0.71 or later.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, SFtp;

...

procedure TForm1.Button1Click(Sender: TObject);
var
sftp: HCkSFtp;
success: Boolean;
handle: PWideChar;

begin
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

sftp := CkSFtp_Create();

// Pass a domain or IP address..
success := CkSFtp_Connect(sftp,'my-sftp-server.com',22);
if (success = True) then
  begin
    success := CkSFtp_AuthenticatePw(sftp,'mySFtpLogin','mySFtpPassword');
  end;
if (success = True) then
  begin
    success := CkSFtp_InitializeSftp(sftp);
  end;
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;

// Open a file on the server for writing.
handle := CkSFtp__openFile(sftp,'myTest.txt','writeOnly','createTruncate');
if (CkSFtp_getLastMethodSuccess(sftp) <> True) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;

// Write some text to the file:
success := CkSFtp_WriteFileText(sftp,handle,'ansi','abcdefghijklmnopqrstuvwxyz');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;

// Make sure the server flushes what we wrote to the disk..
// (this is requires a server that implements the fsync@openssh.com SFTP protocol extension)
success := CkSFtp_Fsync(sftp,handle);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;

// ....
// ....

success := CkSFtp_WriteFileText(sftp,handle,'ansi','ABCDEFGHIJKLMNOPQRSTUVWXYZ');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;

// Close the file.
success := CkSFtp_CloseHandle(sftp,handle);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;

Memo1.Lines.Add('Success.');

CkSFtp_Dispose(sftp);

end;