Pascal (Lazarus/Delphi)

Ungzip Base64 String

See more Gzip Examples

Suppose you have a gzip in base64 representation that contains a text file, such as XML. This example shows how to decompress and access the string. 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.BinData,
  Chilkat.Gzip;

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

procedure RunDemo;
var
  success: Boolean;
  gzip: TGzip;
  gzipBase64: string;
  bd: TBinData;
  strXml: string;

begin
  success := False;

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

  gzip := TGzip.Create;

  gzipBase64 := 'H4sIAAAAAAAE ... X6aZjXO3EwAA';

  bd := TBinData.Create;
  success := bd.AppendEncoded(gzipBase64,'base64');

  success := gzip.UncompressBd(bd);
  if (success <> True) then
    begin
      WriteLn(gzip.LastErrorText);
      Exit;
    end;

  strXml := bd.GetString('utf-8');
  WriteLn('XML:');
  WriteLn(strXml);


  gzip.Free;
  bd.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.