responseHeaders = responseHeaders,
      outFinished = false,
      flushHeaders = false,
    )
    file.source().use { source ->
      stream.getSink().buffer().use { sink ->
        sink.writeAll(source)
      }
    }
  }

  private fun contentType(file: File): String {
    return when {
      file.name.endsWith(".css") -> "text/css"
      file.name.endsWith(".gif") -> "image/gif"