Pascal (Lazarus/Delphi)

FTP Bandwidth Throttle for Downloads

See more FTP Examples

Demonstrates the Chilkat FTP2 download bandwidth throttling property : BandwidthThrottleDown. 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;
  localFilename: string;
  remoteFilename: 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';

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

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

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

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

  success := ftp.GetFile(remoteFilename,localFilename);
  if (success <> True) then
    begin
      WriteLn(ftp.LastErrorText);
      Exit;
    end;

  success := ftp.Disconnect();

  WriteLn('File Downloaded!');


  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.