}
    }

    public void readFrom(InputStream inputStream, int len) throws IOException {
        int bytesLeft = len;
        while (bytesLeft > 0) {
            int spaceLeft = allocateSpace();
            int limit = Math.min(spaceLeft, bytesLeft);
            int readBytes = currentWriteChunk.readFrom(inputStream, limit);
            if (readBytes == -1) {