HarmonyOS 关于使用ArkTS进行Base64解码和GZIP解压

现在有个场景是需要对后端返回数据进行Base64解码和GZIP解压，相关JAVA实现代码如下：

public static byte[] decode(String compressed) {
  try {
    byte[] bytes = Base64.decode(compressed,0);
    if (bytes == null || bytes.length == 0) {
      return null;
    }
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    GZIPInputStream gzipInput = null;
    try {
      gzipInput = new GZIPInputStream(new ByteArrayInputStream(bytes));
      byte[] buffer = new byte[1024];
      int offset;
      while ((offset = gzipInput.read(buffer)) != -1) {
        out.write(buffer, 0, offset);
      }
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      closeQuietly(gzipInput);
      closeQuietly(out);
    }
    return out.toByteArray();
  } catch (Exception e) {
    e.printStackTrace();
  }
  return null;
}

private static void closeQuietly(Closeable closeable) {
  try {
    if (closeable != null) {
      closeable.close();
    }
  } catch (IOException e) {
    e.printStackTrace();
  }
}

采用base64采用Base64HelperAPI进行处理，但是GZIP解压需要怎么实现呢？