Pascal (Lazarus/Delphi)

Create a Zip Entirely in Memory

See more Zip Examples

Demonstrates how to create a .zip from in-memory byte data and strings, and to write the .zip to an in-memory image. 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.FileAccess,
  Chilkat.BinData,
  Chilkat.Zip,
  Chilkat.Crypt2;

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

procedure RunDemo;
var
  success: Boolean;
  crypt: TCrypt2;
  zip: TZip;
  bd: TBinData;
  zipFileInMemory: TBytes;
  fac: TFileAccess;

begin
  success := False;

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

  crypt := TCrypt2.Create;
  zip := TZip.Create;

  success := zip.NewZip('test.zip');
  if (success = False) then
    begin
      WriteLn(zip.LastErrorText);
      Exit;
    end;

  //  Add the bytes 0x00 0x01 0x02 0x03 ... 0x0F as a file in the .zip
  bd := TBinData.Create;
  bd.AppendEncoded('000102030405060708090A0B0C0D0E0F','hex');
  zip.AddBd('binaryData.dat',bd);

  //  Add the string "Hello World!" to the .zip
  zip.AddString('helloWorld.txt','Hello World!','utf-8');

  zipFileInMemory := zip.WriteToMemory();

  //  We could save these files to a file, and it is a valid .zip
  fac := TFileAccess.Create;
  success := fac.WriteEntireFile('test.zip',zipFileInMemory);
  if (success = False) then
    begin
      WriteLn(fac.LastErrorText);
      Exit;
    end;

  WriteLn('Zip Created!');


  crypt.Free;
  zip.Free;
  bd.Free;
  fac.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.