Pascal (Lazarus/Delphi)

Directory Existence Check

See more FTP Examples

How to test if a directory exists on an FTP server.

A good way to check to see if a directory already exists is to try to "cd" to that remote directory by calling ChangeRemoteDir. If it succeeds, then the directory exists. If not, then it does not exist. An alternative method is to set the ListPattern = "*" and then iterate over the files/directories, looking for the directory.

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.Ftp2;

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

procedure RunDemo;
var
  success: Boolean;
  ftp: TFtp2;
  dirExists: Boolean;
  i: Integer;
  n: Integer;
  isDir: Boolean;
  fname: string;

begin
  success := False;

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

  ftp := TFtp2.Create;

  ftp.Hostname := 'ftp.example.com';
  ftp.Username := 'login';
  ftp.Password := 'password';

  //  Connect and login to the FTP server.
  success := ftp.Connect();
  if (success <> True) then
    begin
      WriteLn(ftp.LastErrorText);
      Exit;
    end;

  //  Does the "temp" directory exist?

  dirExists := ftp.ChangeRemoteDir('/temp');
  if (dirExists = True) then
    begin
      WriteLn('Yes, the temp directory exists.');
      //   Yes, it exists. Restore the current remote dir:
      success := ftp.ChangeRemoteDir('..');
      if (success <> True) then
        begin
          WriteLn(ftp.LastErrorText);
          Exit;
        end;
    end;

  //  Alternatively, you may set the ListPattern = "*" and 
  //   look for the directory:
  ftp.ListPattern := '*';

  n := ftp.GetDirCount();
  if (n < 0) then
    begin
      //  Failed to get directory listing based on ListPattern
      WriteLn(ftp.LastErrorText);
      Exit;
    end;
  if (n > 0) then
    begin
      for i := 0 to n - 1 do
        begin

          isDir := ftp.GetIsDirectory(i);
          if (isDir = True) then
            begin

              fname := ftp.GetFilename(i);
              if (fname = 'temp') then
                begin
                  WriteLn('Found temp directory!');
                  success := ftp.Disconnect();
                  Exit;
                end;
            end;
        end;

    end;

  success := ftp.Disconnect();


  ftp.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.