tunnelCodec.finishRequest()
      val response =
        tunnelCodec
          .readResponseHeaders(false)!!
          .request(nextRequest)
          .build()
      tunnelCodec.skipConnectBody(response)

      when (response.code) {
        HttpURLConnection.HTTP_OK -> return null

        HttpURLConnection.HTTP_PROXY_AUTH -> {

    oldDelegate.clearTimeout()
  }

  /**
   * The response body from a CONNECT should be empty, but if it is not then we should consume it
   * before proceeding.
   */
  fun skipConnectBody(response: Response) {
    val contentLength = response.headersContentLength()
    if (contentLength == -1L) return
    val body = newFixedLengthSource(response.request.url, contentLength)