when {
      !response.promisesBody() -> 0L
      response.isChunked -> -1L
      else -> response.headersContentLength()
    }

  override fun openResponseBodySource(response: Response): Source =
    when {
      !response.promisesBody() -> newFixedLengthSource(response.request.url, 0)
      response.isChunked -> newChunkedSource(response.request.url)
      else -> {

  fun openResponseBody(response: Response): ResponseBody {
    try {
      val contentType = response.header("Content-Type")
      val contentLength = codec.reportedContentLength(response)
      val rawSource = codec.openResponseBodySource(response)
      val source =
        ResponseBodySource(
          delegate = rawSource,
          contentLength = contentLength,
          isSocket = false,
        )