Write Bytes to a Remote SFTP File (BinData)

See more SFTP Examples

Demonstrates the Chilkat SFtp.WriteFileBd method, which appends all bytes in a BinData to the remote file identified by an open handle. The first argument is the handle and the second is the BinData.

Note: This example uses a relative local path, which is resolved against the application's current working directory. Absolute local paths may also be used. Supply the path appropriate to your own environment.

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.SFtp,
  Chilkat.BinData;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  sftp: TSFtp;
  port: Integer;
  password: string;
  handle: string;
  bd: TBinData;

begin
  success := False;

  //  Demonstrates the SFtp.WriteFileBd method, which appends all bytes in a BinData to the remote
  //  file identified by an open handle.  The 1st argument is the handle and the 2nd is the BinData.

  sftp := TSFtp.Create;

  //  Connect, authenticate, and initialize the SFTP subsystem.
  port := 22;
  success := sftp.Connect('sftp.example.com',port);
  if (success = False) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;

  //  Normally you would not hard-code the password in source.  You should instead obtain it
  //  from an interactive prompt, environment variable, or a secrets vault.
  password := 'mySshPassword';

  success := sftp.AuthenticatePw('mySshLogin',password);
  if (success = False) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;

  success := sftp.InitializeSftp();
  if (success = False) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;

  //  Open (creating/truncating) the remote file for writing.
  handle := sftp.OpenFile('subdir/image.png','writeOnly','createTruncate');
  if (sftp.LastMethodSuccess = False) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;

  //  Put the bytes to write into a BinData.  (Here they are loaded from a local file, but the
  //  bytes could come from anywhere.)
  bd := TBinData.Create;
  success := bd.LoadFile('qa_data/image.png');
  if (success = False) then
    begin
      WriteLn(bd.LastErrorText);
      Exit;
    end;

  //  Append the BinData bytes to the open remote file.
  success := sftp.WriteFileBd(handle,bd);
  if (success = False) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;

  success := sftp.CloseHandle(handle);
  if (success = False) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;
  WriteLn('Wrote ' + bd.NumBytes + ' bytes.');

  sftp.Disconnect();


  sftp.Free;
  bd.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.