val negotiatedProtocol: String,
    val content: String,
  )

  private fun execute(
    engine: HttpEngine,
    executor: ExecutorService,
    url: String,
  ): CompletableFuture<Response> {
    val completableFuture = CompletableFuture<Response>()
    val buffer = Buffer()

    val req =
      engine.newUrlRequestBuilder(
        url,
        executor,
        object : Callback {

import assertk.assertThat
import assertk.assertions.isEqualTo
import assertk.assertions.isNotEmpty
import assertk.assertions.isNotNull
import java.io.IOException
import java.net.InetAddress
import java.util.concurrent.CompletableFuture
import java.util.concurrent.TimeUnit.SECONDS
import javax.net.ssl.SNIHostName
import javax.net.ssl.SNIMatcher
import javax.net.ssl.SNIServerName
import javax.net.ssl.SSLSocket
import javax.net.ssl.StandardConstants