}

						if opts.PartNumber > 0 && strings.Contains(ci.ETag, "-") {
							w.Header()[xhttp.AmzMpPartsCount] = []string{
								strings.TrimLeftFunc(ci.ETag, func(r rune) bool {
									return !unicode.IsNumber(r)
								}),
							}
						}

						// For providing ranged content
						start, rangeLen, err := rs.GetOffsetLength(ci.Size)
						if err != nil {
							start, rangeLen = 0, ci.Size
						}