Pascal (Lazarus/Delphi)

Check if File Exists

See more SFTP Examples

Demonstrates how to check to see if a file exists. 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;
  hostname: string;
  port: Integer;
  followLinks: Boolean;
  status: Integer;

begin
  success := False;

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

  sftp := TSFtp.Create;

  //  Connect to the SSH server.  
  hostname := 'sftp.example.com';
  port := 22;
  success := sftp.Connect(hostname,port);
  if (success <> True) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;

  //  Authenticate with the SSH server.  Chilkat SFTP supports
  //  both password-based authenication as well as public-key
  //  authentication.  This example uses password authenication.
  success := sftp.AuthenticatePw('myLogin','myPassword');
  if (success <> True) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;

  //  After authenticating, the SFTP subsystem must be initialized:
  success := sftp.InitializeSftp();
  if (success <> True) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;

  //  Check to see if a file exists

  //  The return value is one of the following values:
  //  -1: Unable to check. Examine the LastErrorText to determine the reason for failure.
  //  0: File does not exist.
  //  1: The regular file exists.
  //  2: It exists, but it is a directory.
  //  3: It exists, but it is a symlink (only possible if followLinks is false)
  //  4: It exists, but it is a special filesystem entry type.
  //  5: It exists, but it is an unkown filesystem entry type.
  //  6: It exists, but it is an socket filesystem entry type.
  //  7: It exists, but it is an char device entry type.
  //  8: It exists, but it is an block device entry type.
  //  9: It exists, but it is an FIFO entry type.

  followLinks := True;
  status := sftp.FileExists('someDir/someFile.txt',followLinks);
  if (status < 0) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;

  WriteLn('status = ' + status);

  WriteLn('Success');


  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.