Клієнт (браузер) знатиме, що відповідь надходить від правильного сервера, тому що використовується узгоджена раніше криптографія з використанням **сертифіката HTTPS**.

### Кілька застосунків { #multiple-applications }

На тому самому сервері (або серверах) може бути **кілька застосунків**, наприклад інші програми API або база даних.

        } catch (final Exception e) {
            throw new SuggestSettingsException("Failed to update suggestSettings.", e);
        }
    }

    /**
     * Sets multiple settings from a map.
     * @param map The map of settings to set.
     */
    public void set(final Map<String, Object> map) {
        if (logger.isDebugEnabled()) {

      for (long b : TEST_LONGS) {
        UnsignedLong aUnsigned = UnsignedLong.fromLongBits(a);
        UnsignedLong bUnsigned = UnsignedLong.fromLongBits(b);
        long expected =
            aUnsigned.bigIntegerValue().multiply(bUnsigned.bigIntegerValue()).longValue();
        UnsignedLong unsignedMul = aUnsigned.times(bUnsigned);
        assertThat(unsignedMul.longValue()).isEqualTo(expected);
      }
    }
  }

   * this builder to sort entries by value.
   *
   * <p>Builder instances can be reused - it is safe to call {@link #buildOrThrow} multiple times to
   * build multiple bimaps in series. Each bimap is a superset of the bimaps created before it.
   *
   * @since 2.0
   */
  public static final class Builder<K, V> extends ImmutableMap.Builder<K, V> {

    /**

你可以声明一个参数可以接收 `None`，但它仍然是必填的。这将强制客户端必须发送一个值，即使该值是 `None`。

为此，你可以声明 `None` 是有效类型，但不声明默认值：

{* ../../docs_src/query_params_str_validations/tutorial006c_an_py310.py hl[9] *}

## 查询参数列表 / 多个值 { #query-parameter-list-multiple-values }

当你用 `Query` 显式地定义查询参数时，你还可以声明它接收一个值列表，换句话说，接收多个值。

例如，要声明一个可在 URL 中出现多次的查询参数 `q`，你可以这样写：

{* ../../docs_src/query_params_str_validations/tutorial011_an_py310.py hl[9] *}

然后，访问如下 URL：

然后在 `/docs` UI 中，你能够看到 **FastAPI** 会用这些**模型**来**记录** API，并且还会用它们来**序列化**和**验证**数据。

<div class="screenshot">
<img src="/img/tutorial/sql-databases/image01.png">
</div>

## 使用多个模型更新应用 { #update-the-app-with-multiple-models }

现在让我们稍微**重构**一下这个应用，以提高**安全性**和**多功能性**。

如果你查看之前的应用程序，你可以在 UI 界面中看到，到目前为止，它允许客户端决定要创建的 `Hero` 的 `id`。😱

我们不应该允许这样做，因为他们可能会覆盖我们在数据库中已经分配的 `id`。决定 `id` 的行为应该由**后端**或**数据库**来完成，**而非客户端**。

### SIG Multi-cluster (formerly known as SIG Federation)

[SIG Multi-cluster][] is responsible for infrastructure that supports
the efficient and reliable management of multiple Kubernetes clusters,
and applications that run in and across multiple clusters.

For the 1.8 release, SIG Multicluster focussed on expanding the set of
Kubernetes primitives that our Cluster Federation control plane

   * loading the value for this key, simply waits for that thread to finish and returns its loaded
   * value. Note that multiple threads can concurrently load values for distinct keys.
   *
   * <p>This method does not alter the state of this {@code CacheBuilder} instance, so it can be
   * invoked again to create multiple independent caches.
   *
   * @param loader the cache loader used to obtain new values

  @AndroidIncompatible // presumably slow
  public void testCheckedMultiply() {
    for (int a : ALL_INTEGER_CANDIDATES) {
      for (int b : ALL_INTEGER_CANDIDATES) {
        BigInteger expectedResult = valueOf(a).multiply(valueOf(b));
        boolean expectedSuccess = fitsInInt(expectedResult);
        try {
          assertEquals(a * b, IntMath.checkedMultiply(a, b));
          assertTrue(expectedSuccess);

            assertTrue(e.getMessage().contains("negative [boost] are not allowed"));
        }
    }

    @Test
    public void test_execute_multipleInvocations() {
        // Test that multiple invocations return consistent results
        QueryContext context = new QueryContext("*:*", false);
        MatchAllDocsQuery query = new MatchAllDocsQuery();
        float boost = 1.0f;