isBinaryFile function

Future<bool> isBinaryFile(String path)

Check if a file is binary (non-text).

Implementation

Future<bool> isBinaryFile(String path) async {
  final file = File(path);
  if (!await file.exists()) return false;

  // Check extension first
  final ext = p.extension(path).replaceFirst('.', '').toLowerCase();
  const binaryExts = {
    'png',
    'jpg',
    'jpeg',
    'gif',
    'webp',
    'bmp',
    'ico',
    'mp3',
    'wav',
    'ogg',
    'mp4',
    'avi',
    'mov',
    'zip',
    'tar',
    'gz',
    '7z',
    'rar',
    'pdf',
    'doc',
    'docx',
    'xls',
    'xlsx',
    'exe',
    'dll',
    'so',
    'dylib',
    'woff',
    'woff2',
    'ttf',
    'otf',
    'sqlite',
    'db',
  };
  if (binaryExts.contains(ext)) return true;

  // Read first 8KB and check for null bytes
  try {
    final raf = file.openSync();
    try {
      final bytes = raf.readSync(8192);
      return bytes.any((b) => b == 0);
    } finally {
      raf.closeSync();
    }
  } catch (_) {
    return false;
  }
}