getContentLength method

Future<String?> getContentLength(
  1. Response response
)

获取下载的文件大小 (0 - max) 文件末尾长度

Implementation

Future<String?> getContentLength(Response<dynamic> response) async {
  try {
    return response.headers.value(HttpHeaders.contentRangeHeader);
  } catch (e) {
    return null;
  }
}