Delphi ActiveX

Get an FTP Listing Entry's Size as a String

Demonstrates the Chilkat Ftp2.GetSizeStr method, which returns the size in bytes of a cached directory-listing entry as a decimal string. The only argument is a zero-based index.

Background: Returning the size as text sidesteps integer-width limits entirely, which is useful in languages without a convenient 64-bit type and whenever you only need to display or log the value. Parse the string when you need to do arithmetic on it; otherwise it is ready to print as-is.

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

begin
success := 0;

//  Demonstrates the Ftp2.GetSizeStr method, which returns the size in bytes of a cached
//  directory-listing entry as a decimal string.  The only argument is a zero-based index.

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);

    //  The string form avoids integer-size limits in languages without a convenient 64-bit type.
    fileSize := ftp.GetSizeStr(i);
    Memo1.Lines.Add(name + '  ' + fileSize + ' bytes');
  end;

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