public async Task <long> ReadHeadPosition(CancellationToken cancellationToken = default)
{
var client = CreateClient();
var response = await client.Client.HeadAsync(LinkFormatter.AllStream(), cancellationToken);
response.EnsureSuccessStatusCode();
response.Headers.TryGetValues(Constants.Headers.HeadPosition, out var headPositionHeaders);
if (!long.TryParse(headPositionHeaders.Single(), out var headPosition))
{
throw new InvalidOperationException();
}
return(headPosition);
}
