if !s.IsValid(w, r) {
		return
	}
	volume := r.Form.Get(storageRESTVolume)
	filePath := r.Form.Get(storageRESTFilePath)

	buf := make([]byte, r.ContentLength)
	_, err := io.ReadFull(r.Body, buf)
	if err != nil {
		s.writeErrorResponse(w, err)
		return
	}
	err = s.getStorage().AppendFile(r.Context(), volume, filePath, buf)
	if err != nil {
		s.writeErrorResponse(w, err)
	}
}

		values.Set(storageRESTBitrotHash, "")
	}
	respBody, err := client.call(ctx, storageRESTMethodReadFile, values, nil, -1)
	if err != nil {
		return 0, err
	}
	defer xhttp.DrainBody(respBody)
	n, err := io.ReadFull(respBody, buf)
	return int64(n), toStorageErr(err)
}

// ListDir - lists a directory.

	sz := stat.Size()
	if sz <= metaDataReadDefault {
		buf = metaDataPoolGet()
		buf = buf[:sz]
	} else {
		buf = make([]byte, sz)
	}

	// Read file...
	_, err = io.ReadFull(f, buf)

	return buf, stat.ModTime().UTC(), osErrToFileErr(err)
}

// ReadAll is a raw call, reads content at any path and returns the buffer.

	}
	if length <= 0 {
		length = accessKeyMaxLen
	}
	if length < accessKeyMinLen {
		return "", errors.New("auth: access key length is too short")
	}

	key := make([]byte, length)
	if _, err := io.ReadFull(random, key); err != nil {
		return "", err
	}
	for i := range key {
		key[i] = alphaNumericTable[key[i]%alphaNumericTableLen]
	}
	return string(key), nil
}

	var written int64
	for {
		buf := alignedBuf
		if totalSize > 0 {
			remaining := totalSize - written
			if remaining < int64(len(buf)) {
				buf = buf[:remaining]
			}
		}

		nr, err := io.ReadFull(r, buf)
		eof := errors.Is(err, io.EOF) || errors.Is(err, io.ErrUnexpectedEOF)
		if err != nil && !eof {
			return written, err
		}

		buf = buf[:nr]
		var (
			n  int
			un int
			nw int64

	hasFull := true
	if initial > metaDataReadDefault {
		initial = metaDataReadDefault
		hasFull = false
	}

	buf := metaDataPoolGet()[:initial]
	_, err := io.ReadFull(r, buf)
	if err != nil {
		return nil, fmt.Errorf("readXLMetaNoData(io.ReadFull): %w", err)
	}
	readMore := func(n int64) error {
		has := int64(len(buf))
		if has >= n {
			return nil
		}
		if hasFull || n > size {