Delphi ActiveX Requires Chilkat v11.0.0+

Unzip an AES Encrypted Text File directly into a String Variable

See more Zip Examples

A common need is to unzip from an AES encrypted Zip archive directly into a string variable, such that the unencrypted file never resides on disk, even temporarily. This example shows how to do it. Delphi ActiveX

var
success: Integer;
zip: TChilkatZip;
entry: TChilkatZipEntry;
lineEndingBehavior: Integer;
srcCharset: WideString;
xmlText: WideString;

begin
success := 0;

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

zip := TChilkatZip.Create(Self);

//  This example opens a WinZip-compatible AES encrypted
//  .zip that contains a single file: hamlet.xml.

//  It decrypts and unzips hamlet.xml directly into a string
//  variable.
zip.SetPassword('secret');
success := zip.OpenZip('qa_data/hamlet.zip');
if (success = 0) then
  begin
    Memo1.Lines.Add(zip.LastErrorText);
    Exit;
  end;

entry := TChilkatZipEntry.Create(Self);
success := zip.EntryOf('hamlet.xml',entry.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(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';
xmlText := entry.UnzipToString(lineEndingBehavior,srcCharset);
Memo1.Lines.Add(xmlText);