Delphi DLL

Gzip Compress In Memory and Base64 Encode

See more Gzip Examples

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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
gzip: HCkGzip;
fileData: HCkBinData;
strBase64: PWideChar;
strBase64MultiLine: PWideChar;

begin
success := False;

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

gzip := CkGzip_Create();

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

// In-place compress the contents of fileData
success := CkGzip_CompressBd(gzip,fileData);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkGzip__lastErrorText(gzip));
    Exit;
  end;

// Get the base64 encoded compressed data (in a single line).
strBase64 := CkBinData__getEncoded(fileData,'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 := CkBinData__getEncoded(fileData,'base64-mime');
Memo1.Lines.Add(strBase64MultiLine);

CkGzip_Dispose(gzip);
CkBinData_Dispose(fileData);

end;