url.newBuilder()
              .addQueryParameter("hostname", hostname).build(),
          )
          .post(query.toRequestBody(DNS_MESSAGE))
      } else {
        val encoded = query.base64Url().replace("=", "")
        val requestUrl = url.newBuilder().addQueryParameter("dns", encoded).build()

        url(requestUrl)
      }
    }.build()

  class Builder {
    internal var client: OkHttpClient? = null