@ExperimentalCoroutinesApi // resume with a resource cleanup.
suspend fun Call.executeAsync(): Response =
  suspendCancellableCoroutine { continuation ->
    continuation.invokeOnCancellation {
      this.cancel()
    }
    this.enqueue(
      object : Callback {
        override fun onFailure(
          call: Call,
          e: IOException,
        ) {
          continuation.resumeWithException(e)
        }

  override fun request(): Request = error("unexpected")

  override fun execute(): Response = error("unexpected")

  override fun enqueue(responseCallback: Callback): Unit = error("unexpected")

  override fun cancel(): Unit = error("unexpected")

  override fun isExecuted(): Boolean = error("unexpected")

  override fun isCanceled(): Boolean = error("unexpected")

  override fun timeout(): Timeout = error("unexpected")

          callB.cancel()
          return MockResponse(body = (nextResponse++).toString())
        }
      }
    callA.enqueue(callback)
    callB.enqueue(callback)
    assertThat(server.takeRequest().path).isEqualTo("/a")
    callback.await(requestA.url).assertBody("A")
    // At this point we know the callback is ready, and that it will receive a cancel failure.

        else -> Socket(route.proxy)
      }
    this.rawSocket = rawSocket

    // Handle the race where cancel() precedes connectSocket(). We don't want to miss a cancel.
    if (canceled) {
      throw IOException("canceled")
    }

    rawSocket.soTimeout = socketReadTimeoutMillis
    try {

          """
          |data: hey
          |
          |
          """.trimMargin(),
        ).setHeader("content-type", "text/event-stream")
        .build(),
    )
    listener.enqueueCancel() // Will cancel in onOpen().
    val request =
      Request.Builder()
        .url(server.url("/"))
        .build()
    val response = client.newCall(request).execute()
    processResponse(response, listener)

  }

  private fun logWithTime(message: String) {
    val startNs = startNs
    val timeMs =
      if (startNs == null) {
        // Event occurred before start, for an example an early cancel.
        0L
      } else {
        TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNs)
      }

    logger.invoke("[$timeMs ms] $message")
  }

        throw IllegalStateException(
          "Cannot stream a request body without chunked encoding or a known content length!",
        )
    }
  }

  override fun cancel() {
    carrier.cancel()
  }

  /**
   * Prepares the HTTP headers and sends them to the server.
   *
   * For streaming requests with a body, headers must be prepared **before** the output stream has

    get().log("[ES] onFailure", Platform.INFO, t)
    events.add(Failure(t, response))
    drainCancelQueue(eventSource)
  }

  private fun drainCancelQueue(eventSource: EventSource) {
    if (cancel) {
      cancel = false
      eventSource.cancel()
    }
  }

  private fun nextEvent(): Any {
    return events.poll(10, TimeUnit.SECONDS)
      ?: throw AssertionError("Timed out waiting for event.")
  }

      }
      try {
        sink.close()
      } catch (ignored: IOException) {
      }
      closed = true
    }

    override fun cancel() {
      canceled = true
      sourcePipe.cancel()
      sinkPipe.cancel()
    }
  }

  companion object {
    private fun ns(millis: Long): Long {
      return millis * 1000000L
    }
  }

    val server = serverListener.assertOpen()

    // Initiate a close on the client, which will schedule a hard cancel in 500 ms.
    val closeAtNanos = System.nanoTime()
    webSocket.close(1000, "goodbye", 500L)
    serverListener.assertClosing(1000, "goodbye")

    // Confirm that the hard cancel occurred after 500 ms.
    clientListener.assertFailure()
    val elapsedUntilFailure = System.nanoTime() - closeAtNanos