spark java enable gzip if needed

enableGzip.java

private static void enableGzipIfNeeded(spark.Request request, spark.Response response) {
    String accept = request.headers("Accept-Encoding");
    if (accept == null) {
        return;
    }
    String[] tokens = accept.split(",");
    if (Arrays.stream(tokens).map(String::trim).anyMatch(s -> s.equalsIgnoreCase("gzip"))) {
        response.header("Content-Encoding", "gzip");
    }
}