Delphi DLL

Count Files in a Remote FTP Directory

Demonstrates the Chilkat Ftp2.GetDirCount method, which returns the number of files and directories in the current remote directory. It takes no arguments; the first call retrieves the listing, and the count reflects the case-insensitive ListPattern filter. A negative return indicates failure.

Background: GetDirCount is the entry point to Chilkat's index-based directory API: its first call fetches the listing for the current directory into a cache, and the returned count establishes the valid index range (0 through count - 1) for the accessor methods that read names, sizes, and attributes. The ListPattern property narrows the listing to matching names before counting, which is how you list, say, only *.html without filtering in your own code.

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var
success: Boolean;
ftp: HCkFtp2;
n: Integer;
i: Integer;
name: PWideChar;

begin
success := False;

//  Demonstrates the Ftp2.GetDirCount method, which returns the number of files and directories in
//  the current remote directory's listing.  It takes no arguments.  The first call retrieves the
//  listing; the count reflects the case-insensitive ListPattern filter.

ftp := CkFtp2_Create();

CkFtp2_putHostname(ftp,'ftp.example.com');
CkFtp2_putUsername(ftp,'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.
CkFtp2_putPassword(ftp,'myPassword');

success := CkFtp2_Connect(ftp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

success := CkFtp2_ChangeRemoteDir(ftp,'public_html');
if (success = False) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

//  Optionally filter the listing with a wildcard pattern.  "*" (the default) matches everything.
CkFtp2_putListPattern(ftp,'*.html');

n := CkFtp2_GetDirCount(ftp);
if (n < 0) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;
Memo1.Lines.Add('Matching entries: ' + IntToStr(n));

//  The count defines the valid index range 0 through n-1 for the indexed accessor methods.

for i := 0 to n - 1 do
  begin
    name := CkFtp2__getFilename(ftp,i);
    Memo1.Lines.Add(name);
  end;

success := CkFtp2_Disconnect(ftp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

CkFtp2_Dispose(ftp);