Apache httpcomponents 5 chunked response

Question

I am accessing an internal site that returns gzipped content. When the content reaches a certain size, the site returns a chunked response. I am using the Apache httpcomponents 5 CloseableHttpAsyncClient and the SimpleHttpRequest and SimpleHttpResponse. The internal site is a vendor product that can't be modified.

String encoding = getEncoding(response.getHeaders());
byte[] bytes;
byte[] bodyBytes = response.getBodyBytes();
if (encoding.equals("gzip")) {
    ByteArrayInputStream inputStream = new ByteArrayInputStream(bodyBytes);
    GZIPInputStream gzipInputStream = new GZIPInputStream(inputStream);
    bytes = IOUtils.toByteArray(gzipInputStream);
} else {
    bytes = bodyBytes;
}
String html = new String(bytes, StandardCharsets.UTF_8);

I check for the response type as follows

private String getEncoding(Header[] headers) {
    for (Header header : headers) {
        if (header.getName().toLowerCase().equals("transfer-encoding")) {
            return header.getValue();
        }
        if (header.getName().toLowerCase().equals("content-encoding")) {
            return header.getValue();
        }
    }
    return "";
}

I know that there is a ChunkedInputStream class, but the inputs to the constructor are not obviously available from the response

ChunkedInputStream(SessionInputBuffer buffer, InputStream inputStream)
Wraps session input stream and reads chunk coded input.
ChunkedInputStream(SessionInputBuffer buffer, InputStream inputStream, Http1Config http1Config)
Default constructor.

Do I need to use a different response type? If so, which one? Or is there a different way that is better?

Thanks for your help.