mapFromQueryString function

Map<String, String> mapFromQueryString(String query)

Parses a URL query string into a Map<String, String>.

mapFromQueryString('page=1&q=hello') // {'page': '1', 'q': 'hello'}

Implementation

Map<String, String> mapFromQueryString(String query) {
  if (query.isEmpty) return {};
  final q = query.startsWith('?') ? query.substring(1) : query;
  return Map.fromEntries(
    q.split('&').where((p) => p.isNotEmpty).map((pair) {
      final idx = pair.indexOf('=');
      if (idx == -1) {
        return MapEntry(Uri.decodeQueryComponent(pair), '');
      }
      return MapEntry(
        Uri.decodeQueryComponent(pair.substring(0, idx)),
        Uri.decodeQueryComponent(pair.substring(idx + 1)),
      );
    }),
  );
}