assertFailsWith<IOException> {
      call.execute()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("timeout")
    }
  }

  /** Same as the previous test, but the server stalls sending the response body.  */
  @Test
  fun bodyReadTimeoutDoesNotStartUntilLastRequestBodyByteFire() {
    enableProtocol(Protocol.HTTP_2)
    server.enqueue(
      MockResponse.Builder()

  public static RateLimiter create(double permitsPerSecond) {
    /*
     * The default RateLimiter configuration can save the unused permits of up to one second. This
     * is to avoid unnecessary stalls in situations like this: A RateLimiter of 1qps, and 4 threads,
     * all calling acquire() at these moments:
     *
     * T0 at 0 seconds
     * T1 at 1.05 seconds
     * T2 at 2 seconds
     * T3 at 3 seconds

  fun sleep(durationNanos: Long) {
    taskRunner.lock.withLock {
      val sleepUntil = nanoTime + durationNanos
      yieldUntil { nanoTime >= sleepUntil }
    }
  }

  /**
   * Artificially stall until manually resumed by the test thread with [runTasks]. Use this to
   * simulate races in tasks that doesn't have a deterministic sequence.
   */
  fun yield() {
    taskRunner.assertThreadDoesntHoldLock()

FastAPI è un web framework moderno e veloce (a prestazioni elevate) che serve a creare API con Python 3.6+ basato sulle annotazioni di tipo di Python.

Le sue caratteristiche principali sono:

* **Velocità**: Prestazioni molto elevate, alla pari di **NodeJS** e **Go** (grazie a Starlette e Pydantic). [Uno dei framework Python più veloci in circolazione](#performance).

 *  Fix: Don't lose HTTP/2 flow control bytes when incoming data races with a stream close. If this
    happened enough then eventually the connection would stall.

 *  Fix: Acknowledge and apply inbound HTTP/2 settings atomically. Previously we had a race where we
    could use new flow control capacity before acknowledging it, causing strict HTTP/2 servers to
    fail the call.

   */
  @Test
  fun unacknowledgedPingFailsConnection() {
    assumeNotWindows()
    client =
      client.newBuilder()
        .pingInterval(Duration.ofMillis(500))
        .build()

    // Stall in onOpen to prevent pongs from being sent.
    val latch = CountDownLatch(1)
    webServer.enqueue(
      MockResponse.Builder()
        .webSocketUpgrade(
          object : WebSocketListener() {

          ]
        },
        "italian_stop": {
          "type":       "stop",

## Version 3.14.3

_2019-09-10_

 *  Fix: Don't lose HTTP/2 flow control bytes when incoming data races with a stream close. If this
    happened enough then eventually the connection would stall.

 *  Fix: Acknowledge and apply inbound HTTP/2 settings atomically. Previously we had a race where we
    could use new flow control capacity before acknowledging it, causing strict HTTP/2 servers to
    fail the call.

    client =
      client.newBuilder()
        .dispatcher(dispatcher)
        .build()
    val requestA = Request(server.url("/a"))
    val requestB = Request(server.url("/b"))
    val callA = client.newCall(requestA)
    val callB = client.newCall(requestB)
    server.dispatcher =
      object : mockwebserver3.Dispatcher() {
        var nextResponse = 'A'

    assertThat(peer.takeFrame().type).isEqualTo(Http2.TYPE_HEADERS)
    assertThat(peer.takeFrame().type).isEqualTo(Http2.TYPE_RST_STREAM)
  }

  /**
   * Confirm that the client times out if the server stalls after 3 bytes. After the timeout the
   * connection is still considered healthy while we await the degraded pong. When that doesn't
   * arrive the connection goes unhealthy.
   */
  @Test fun readTimesOut() {