file method

@override DVAssetFile? file(String path)

The file at path -- relative, with /, as dvAssetPath returns it -- or null when there is none. A directory is not a file.

Implementation

@override
DVAssetFile? file(String path) {
  // Callers pass what dvAssetPath returns; refused here as well, because a
  // directory is the one source a dot-dot could actually leave.
  if (path.split('/').any((String s) => s == '..' || s.isEmpty) || path.contains(r'\')) {
    return null;
  }
  final File file = File(<String>[root, ...path.split('/')].join(Platform.pathSeparator));
  final FileStat stat = file.statSync();
  if (stat.type != FileSystemEntityType.file) return null;
  return _DirectoryFile(path, file, stat);
}