(Delphi ActiveX) Gzip Compress In Memory and Base64 Encode

Demonstrates how to Gzip compress in-memory data and then encode the compressed data to base64.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
gzip: TChilkatGzip;
fileData: TChilkatBinData;
success: Integer;
strBase64: WideString;
strBase64MultiLine: WideString;

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

gzip := TChilkatGzip.Create(Self);

// This example will load a file into the fileData object.
// Your application might load fileData from other sources..
fileData := TChilkatBinData.Create(Self);
success := fileData.LoadFile('qa_data/xml/hamlet.xml');
if (success <> 1) then
  begin
    Memo1.Lines.Add('Failed to load file.');
    Exit;
  end;

// In-place compress the contents of fileData
success := gzip.CompressBd(fileData.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(gzip.LastErrorText);
    Exit;
  end;

// Get the base64 encoded compressed data (in a single line).
strBase64 := fileData.GetEncoded('base64');
Memo1.Lines.Add(strBase64);
Memo1.Lines.Add('--------');

// To get the base64 in multiple lines, as it might appear in MIME,
// use "base64-mime".
strBase64MultiLine := fileData.GetEncoded('base64-mime');
Memo1.Lines.Add(strBase64MultiLine);
end;