Delphi DLL

FTP Bandwidth Throttle for Downloads

See more FTP Examples

Demonstrates the Chilkat FTP2 download bandwidth throttling property : BandwidthThrottleDown. Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Ftp2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
ftp: HCkFtp2;
localFilename: PWideChar;
remoteFilename: PWideChar;

begin
success := False;

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

ftp := CkFtp2_Create();

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

// To use FTP bandwidth throttling, set the BandwidthThrottleDown
// property to a maximum desired bytes/second:
// This example limits the download to 50K per second.
CkFtp2_putBandwidthThrottleDown(ftp,50000);

// The default data transfer mode is "Active" as opposed to "Passive".

// Connect and login to the FTP server.
success := CkFtp2_Connect(ftp);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

// Change to the remote directory where the file is located.
// This step is only necessary if the file is not in the root directory
// for the FTP account.
success := CkFtp2_ChangeRemoteDir(ftp,'junk');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

// Download a file.
localFilename := 'hamlet.xml';
remoteFilename := 'hamlet.xml';

success := CkFtp2_GetFile(ftp,remoteFilename,localFilename);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

success := CkFtp2_Disconnect(ftp);

Memo1.Lines.Add('File Downloaded!');

CkFtp2_Dispose(ftp);

end;