Pascal (Lazarus/Delphi)

Get a Remote File's Size (32-bit)

Demonstrates the Chilkat SFtp.GetFileSize32 method, which returns a remote file's size in bytes as a 32-bit integer. The arguments are the remote path (or handle), whether symbolic links are followed, and whether the first argument is a handle.

Background: A 32-bit signed integer tops out near 2 GB, so this is fine for ordinary files but will misreport or fail for larger ones. When a file might exceed that, use GetFileSizeStr, which returns the size as a decimal string and cannot overflow. The two boolean arguments are shared by all the attribute getters: the first follows symbolic links to their target, and the second says whether you passed a path or an open handle.

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Pascal (Lazarus/Delphi)

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;

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

procedure RunDemo;
var
  success: Boolean;
  sftp: TSFtp;
  port: Integer;
  password: string;
  bFollowLinks: Boolean;
  bIsHandle: Boolean;
  fileSize: Integer;

begin
  success := False;

  //  Demonstrates the SFtp.GetFileSize32 method, which returns a remote file's size in bytes as a
  //  32-bit integer.  The 1st argument is the remote path (or handle), the 2nd selects whether
  //  symbolic links are followed, and the 3rd indicates whether the 1st argument is a handle.

  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;

  //  The 2nd argument (bFollowLinks) selects whether a symbolic link is followed to its target.
  //  The 3rd argument (bIsHandle) is False here because the 1st argument is a path, not an
  //  open handle.
  bFollowLinks := True;
  bIsHandle := False;

  fileSize := sftp.GetFileSize32('subdir/report.pdf',bFollowLinks,bIsHandle);
  if (fileSize < 0) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;
  WriteLn('File size: ' + fileSize + ' bytes');

  //  Note: For files that may exceed 2 GB, use GetFileSizeStr (returns a decimal string) instead,
  //  because the value can overflow a 32-bit integer.

  sftp.Disconnect();


  sftp.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.