}

  /**
   * Revoke this exchange's access to streams. This is necessary when a follow-up request is
   * required but the preceding exchange hasn't completed yet.
   */
  fun detachWithViolence() {
    codec.cancel()
    call.messageDone(
      exchange = this,
      requestDone = true,
      responseDone = true,
      e = null,
    )
  }

  private fun trackFailure(e: IOException) {

        if ("100-continue".equals(request.header("Expect"), ignoreCase = true)) {
          exchange.flushRequest()
          responseBuilder = exchange.readResponseHeaders(expectContinue = true)
          exchange.responseHeadersStart()
          invokeStartEvent = false
        }
        if (responseBuilder == null) {
          if (requestBody.isDuplex()) {

    open fun receivedResponseAtMillis(receivedResponseAtMillis: Long) =
      apply {
        this.receivedResponseAtMillis = receivedResponseAtMillis
      }

    internal fun initExchange(exchange: Exchange) {
      this.exchange = exchange
    }

    open fun build(): Response {
      check(code >= 0) { "code < 0: $code" }
      return Response(
        checkNotNull(request) { "request == null" },

    exchange: Exchange,
    requestDone: Boolean = false,
    responseDone: Boolean = false,
    e: IOException?,
  ): IOException? {
    if (exchange != this.exchange) return e // This exchange was detached violently!

    var bothStreamsDone = false
    var callDone = false
    withLock {
      if (requestDone && requestBodyOpen || responseDone && responseBodyOpen) {
        if (requestDone) requestBodyOpen = false

  private val index: Int,
  internal val exchange: Exchange?,
  internal val request: Request,
  internal val connectTimeoutMillis: Int,
  internal val readTimeoutMillis: Int,
  internal val writeTimeoutMillis: Int,
) : Interceptor.Chain {
  private var calls: Int = 0

  internal fun copy(
    index: Int = this.index,
    exchange: Exchange? = this.exchange,
    request: Request = this.request,

internal var RealConnection.idleAtNsAccessor: Long
  get() = idleAtNs
  set(value) {
    idleAtNs = value
  }

internal val Response.exchangeAccessor: Exchange?
  get() = this.exchange

internal val Exchange.connectionAccessor: RealConnection
  get() = this.connection

            .request(request)
            .priorResponse(priorResponse?.stripBody())
            .build()

        val exchange = call.interceptorScopedExchange
        val followUp = followUpRequest(response, exchange)

        if (followUp == null) {
          if (exchange != null && exchange.isDuplex) {
            call.timeoutEarlyExit()
          }
          closeActiveExchange = false

  @Throws(IOException::class)
  override fun intercept(chain: Interceptor.Chain): Response {
    val realChain = chain as RealInterceptorChain
    val exchange = realChain.call.initExchange(realChain)
    val connectedChain = realChain.copy(exchange = exchange)
    return connectedChain.proceed(realChain.request)
  }

   * connection index, they also shared a socket connection.
   */
  public val connectionIndex: Int,
  /**
   * The index of this exchange on its HTTP connection. A request is uniquely identified by the
   * (connection index, exchange index) pair.
   */
  public val exchangeIndex: Int,
  /**
   * The TLS handshake of the connection that carried this request, or null if the request was

  val carrier: Carrier

  /** Returns true if the response body and (possibly empty) trailers have been received. */
  val isResponseComplete: Boolean

  /** The socket that carries this exchange. */
  val socket: Socket

  /** Returns an output stream where the request body can be streamed. */
  @Throws(IOException::class)
  fun createRequestBody(
    request: Request,
    contentLength: Long,
  ): Sink