*
   * To differentiate the two cases we ping the server when a stream times out. If the overall
   * connection is fine the ping will receive a pong; otherwise it won't.
   *
   * The deadline to respond to this ping attempts to limit the cost of being wrong. If it is too
   * long, streams created while we await the pong will reuse broken connections and inevitably

      awaitingPong = true
    }

    if (failedPing != -1) {
      failWebSocket(
        e =
          SocketTimeoutException(
            "sent ping but didn't receive pong within " +
              "${pingIntervalMillis}ms (after ${failedPing - 1} successful ping/pongs)",
          ),
        isWriter = true,
      )
      return
    }

    try {
      writer.writePing(ByteString.EMPTY)

mongodb.png...

    taskFaker.advanceUntil(ns(500L))
    server.processNextFrame() // Ping.
    client.processNextFrame() // Pong.
    taskFaker.advanceUntil(ns(1000L))
    server.processNextFrame() // Ping.
    client.processNextFrame() // Pong.
    taskFaker.advanceUntil(ns(1500L))
    server.processNextFrame() // Ping.
    client.processNextFrame() // Pong.
  }

  @Test
  fun unacknowledgedPingFailsConnection() {

		return
	}
	// Single calls do not support pinging.
	if v, ok := c.inStream.Load(m.MuxID); ok {
		pong := v.ping(m.Seq)
		gridLogIf(ctx, c.queueMsg(m, &pong))
	} else {
		pong := pongMsg{NotFound: true}
		gridLogIf(ctx, c.queueMsg(m, &pong))
	}
	return
}

func (c *Connection) handleDisconnectClientMux(m message) {
	if v, ok := c.outgoing.Load(m.MuxID); ok {

	case m.outBlock <- struct{}{}:
	default:
		gridLogIf(m.ctx, errors.New("output unblocked overflow"))
	}
}

func (m *muxClient) pong(msg pongMsg) {
	if msg.NotFound || msg.Err != nil {
		err := errors.New("remote terminated call")
		if msg.Err != nil {
			err = fmt.Errorf("remove pong failed: %v", &msg.Err)
		}
		m.addResponse(Response{Err: err})
		return
	}
	atomic.StoreInt64(&m.LastPong, time.Now().Unix())
}

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* Kliknij przycisk "Try it out" (wypróbuj), pozwoli Ci to wypełnić parametry i bezpośrednio użyć API:

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-04-swagger-03.png)

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* Нажмите на кнопку "Try it out", это позволит вам заполнить параметры и напрямую взаимодействовать с API:

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-04-swagger-03.png)

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* Fai click sul pulsante "Try it out", che ti permette di inserire i parametri per interagire direttamente con l'API:

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-04-swagger-03.png)

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* 点击「Try it out」按钮，之后你可以填写参数并直接调用 API：

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-04-swagger-03.png)

* 然后点击「Execute」按钮，用户界面将会和 API 进行通信，发送参数，获取结果并在屏幕上展示：

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-05-swagger-04.png)

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