Delphi ActiveX

Check if an FTP Listing Entry is a Directory

Demonstrates the Chilkat Ftp2.GetIsDirectory method, which returns whether a cached directory-listing entry is a directory. The only argument is a zero-based index. An invalid index returns false.

Background: Distinguishing directories from files is the first thing most listing code needs — to render a folder tree, to decide whether to recurse, or to apply different handling. This reads the type from the cached listing, so it is a local lookup rather than a server query. Reliability depends on the server's listing format conveying the type, which the common Unix and MLSD formats do.

Chilkat Delphi ActiveX Downloads

Download Chilkat for Delphi ActiveX

Delphi ActiveX

var
success: Integer;
ftp: TChilkatFtp2;
n: Integer;
i: Integer;
name: WideString;

begin
success := 0;

//  Demonstrates the Ftp2.GetIsDirectory method, which returns whether a cached directory-listing
//  entry is a directory.  The only argument is a zero-based index into the current listing.

ftp := TChilkatFtp2.Create(Self);

ftp.Hostname := 'ftp.example.com';
ftp.Username := 'myFtpLogin';

//  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.
ftp.Password := 'myPassword';

success := ftp.Connect();
if (success = 0) then
  begin
    Memo1.Lines.Add(ftp.LastErrorText);
    Exit;
  end;

success := ftp.ChangeRemoteDir('public_html');
if (success = 0) then
  begin
    Memo1.Lines.Add(ftp.LastErrorText);
    Exit;
  end;

//  GetDirCount retrieves the directory listing on the first call and returns the number of
//  entries.  A negative return indicates failure.
n := ftp.GetDirCount();
if (n < 0) then
  begin
    Memo1.Lines.Add(ftp.LastErrorText);
    Exit;
  end;

for i := 0 to n - 1 do
  begin
    name := ftp.GetFilename(i);
    if (ftp.GetIsDirectory(i)) then
      begin
        Memo1.Lines.Add('[DIR]  ' + name);
      end
    else
      begin
        Memo1.Lines.Add('       ' + name);
      end;
  end;

success := ftp.Disconnect();
if (success = 0) then
  begin
    Memo1.Lines.Add(ftp.LastErrorText);
    Exit;
  end;