extract method

Implementation

@override
Future<Result<FormMap, Rejection>> extract(Request request) async {
  final parts = RequestParts.of(request);
  if (parts.method == 'GET' || parts.method == 'HEAD') {
    return Ok(FormMap(request.url.queryParameters));
  }

  if (parts.mediaType != 'application/x-www-form-urlencoded') {
    return const Err(
      Rejection.unsupportedMediaType(
        'expected application/x-www-form-urlencoded',
      ),
    );
  }

  switch (await readBody(request, limit: limit)) {
    case Err(:final error):
      return Err(error);
    case Ok(:final value):
      try {
        return Ok(FormMap(Uri.splitQueryString(utf8.decode(value))));
      } on FormatException catch (error) {
        return Err(
          Rejection.badRequest('malformed form body: ${error.message}'),
        );
      }
  }
}