Upload Bytes to an SFTP Server (BinData)

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Demonstrates the Chilkat SFtp.UploadBd method, which uploads all bytes in a BinData to a remote file. The first argument is the BinData and the second is the remote file path.

Note: This example uses relative local paths, which are resolved against the application's current working directory. Absolute local paths may also be used. Supply the paths 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;
  bd: TBinData;

begin
  success := False;

  //  Demonstrates the SFtp.UploadBd method, which uploads all bytes in a BinData to a remote file.
  //  The 1st argument is the BinData and the 2nd is the remote file path.

  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;

  //  Put the bytes to upload 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;

  //  Upload the bytes.  If the remote file exists, it is truncated first.
  success := sftp.UploadBd(bd,'subdir/image.png');
  if (success = False) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;
  WriteLn('Uploaded ' + 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.