}

	clientETag, err := etag.FromContentMD5(r.Header)
	if err != nil {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidDigest), r.URL)
		return
	}

	// if Content-Length is unknown/missing, throw away
	size := r.ContentLength

	rAuthType := getRequestAuthType(r)
	// For auth type streaming signature, we need to gather a different content length.
	switch rAuthType {

				} else {
					err = errFileNotFound
				}
			}
		}
		// when we have insufficient read quorum and inconsistent metadata return
		// file not found, since we can't possibly have a way to recover this object
		// anyway.
		if v, ok := err.(InsufficientReadQuorum); ok && v.Type == RQInconsistentMeta {
			if opts.VersionID != "" {
				err = errFileVersionNotFound
			} else {
				err = errFileNotFound

		_, encrypted := crypto.IsEncrypted(fi.Metadata)
		compressed := fi.IsCompressed()
		switch {
		case compressed:
			// ... nothing changes for compressed stream.
			// if actualSize is -1 we have no known way to
			// determine what is the actualSize.
		case encrypted:
			decSize, err := sio.DecryptedSize(uint64(n))
			if err == nil {
				actualSize = int64(decSize)
			}
		default:
			actualSize = n
		}