var Unrar = require('unrar');

var archive = new Unrar('archive.rar');
// or
// var archive = new Unrar({
//   path:      protectedArchivePath,
//   arguments: ['-pPassword'],
//   bin: pathToUnrarBin // Default: unrar
// });

archive.list(function (err, entries) {
  var stream = archive.stream('some_binary_entry'); // name of entry
  stream.on('error', console.error);
  stream.pipe(require('fs').createWriteStream('some-binary-file'));
});

var Unrar = require('unrar');

var archive = new Unrar('/path/to/some/file.rar');