Pascal (Lazarus/Delphi)

Unzip Files to Byte Array

See more Zip Examples

Demonstrates how to unzip each file contained in a .zip to an in-memory byte array. 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;
  numEntries: Integer;
  entry: TZipEntry;
  i: Integer;
  fileData: TBytes;

begin
  success := False;

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

  zip := TZip.Create;

  success := zip.OpenZip('qa_data/zips/test.zip');
  if (success = False) then
    begin
      WriteLn(zip.LastErrorText);
      Exit;
    end;

  //  Iterate of each entry in the zip.
  //  An entry can be a file or directory entry.  For each file, unzip to a byte array.
  numEntries := zip.NumEntries;
  WriteLn('NumEntries = ' + numEntries);

  entry := TZipEntry.Create;
  i := 0;
  while i < numEntries do
    begin
      zip.EntryAt(i,entry);
      if (entry.IsDirectory = False) then
        begin
          fileData := entry.Inflate();
          //  Do whatever you wish with the file data...
        end;
      i := i + 1;
    end;

  zip.CloseZip();

  WriteLn('Finished.');


  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.