Pascal (Lazarus/Delphi)

Unzip Encrypted Text into a String Variable

See more Zip Examples

Demonstrates how to open an encrypted .zip archive and unzip a text file directly into a string variable. 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.ZipEntry,
  Chilkat.Zip;

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

procedure RunDemo;
var
  success: Boolean;
  zip: TZip;
  entry: TZipEntry;
  lineEndingBehavior: Integer;
  srcCharset: string;
  strCsv: string;

begin
  success := False;

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

  zip := TZip.Create;

  //  Set the password required for decrypting.
  zip.DecryptPassword := 'myPassword';

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

  //  Locate the file within the Zip to be unzipped into a string variable:
  entry := TZipEntry.Create;
  success := zip.EntryMatching('*.csv',entry);
  if (success = False) then
    begin
      WriteLn(zip.LastErrorText);
      Exit;
    end;

  //  lineEndingBehavior:
  //  0 = leave unchanged.
  //  1 = convert all to bare LF's
  //  2 = convert all to CRLF's
  lineEndingBehavior := 0;
  srcCharset := 'utf-8';

  strCsv := entry.UnzipToString(lineEndingBehavior,srcCharset);
  WriteLn(strCsv);


  zip.Free;
  entry.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.