Pascal (Lazarus/Delphi)

FTP Non-Recursive Sync Directory (Download)

See more FTP Examples

Download files from the server that have filenames matchhing a pattern, and don't yet exist in a local directory. 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,
  Chilkat.StringTable;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  ftp: TFtp2;
  mode: Integer;
  st: TStringTable;
  numFiles: Integer;
  i: Integer;
  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 := 'myUsername';
  ftp.Password := 'myPassword';
  ftp.Port := 21;
  ftp.AuthTls := True;

  //  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 files are located.
  //  This step is only necessary if the files are not in the root directory
  //  of the FTP account.
  success := ftp.ChangeRemoteDir('qa');
  if (success <> True) then
    begin
      WriteLn(ftp.LastErrorText);
      Exit;
    end;

  //  Indicate that we only want to download files with filenames ending in ".txt"
  ftp.SyncMustMatch := '*.txt';

  //  Modes for synchronization are as follows:
  //  mode=0: Download all files
  //  mode=1: Download all files that do not exist on the local filesystem.
  //  mode=2: Download newer or non-existant files.
  //  mode=3: Download only newer files. If a file does not already exist on the local filesystem, it is not downloaded from the server.
  //  mode=5: Download only missing files or files with size differences.
  //  mode=6: Same as mode 5, but also download newer files.
  //  mode=99: Do not download files, but instead delete remote files that do not exist locally.
  mode := 1;

  //  Download all files matching "*.txt" from the current remote ftp directory.
  //  The files are downloaded into c:/temp/qa_output
  success := ftp.SyncLocalDir('c:/temp/qa_output',mode);
  if (success <> True) then
    begin
      WriteLn(ftp.LastErrorText);
      Exit;
    end;

  //  Perhaps we wish to delete the files we just downloaded from the server..
  st := TStringTable.Create;
  ftp.GetSyncedFiles(st);

  numFiles := st.Count;
  i := 0;

  while i < numFiles do
    begin
      remoteFilename := st.StringAt(i);
      WriteLn('Deleting ' + remoteFilename + ' from the FTP server');
      success := ftp.DeleteRemoteFile(remoteFilename);
      if (success <> True) then
        begin
          WriteLn(ftp.LastErrorText);
          Exit;
        end;
      i := i + 1;
    end;

  success := ftp.Disconnect();


  ftp.Free;
  st.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.