/// <summary>
/// Byte Range Response
/// </summary>
/// <param name="content">source content stream</param>
/// <param name="range">range header</param>
/// <param name="mediaType">MIME</param>
/// <exception cref="NotSupportedException"></exception>
public ByteRangeResponse(Stream content, RangeHeaderValue range, string mediaType)
{
if (!range.Unit.Equals("BYTES",StringComparison.InvariantCultureIgnoreCase))
{
throw new NotSupportedException();
}
if (!range.Any())
{
throw new ArgumentException("range");
}
if (string.IsNullOrEmpty(mediaType))
{
mediaType = MimeTypes.GetMimeType("application/octet-stream");
}
var contentLength = content.Length - content.Position;
var itemCount = range.RangeItemHeaderValues.Count();
if (itemCount == 1)
{
var rangeItem = range.First();
base.Contents = x =>
{
var temStream = new ByteRangeStream(content, rangeItem);
temStream.CopyTo(x);
};
base.ContentType = mediaType;
base.Headers.Add("Content-Range", $"{range.Unit} {rangeItem.From}-{rangeItem.To}/{contentLength}");
base.StatusCode = HttpStatusCode.PartialContent;
}
else
{
throw new NotSupportedException();
}
}
