*   <li>Underscores ('_') are permitted wherever dashes ('-') are permitted.
   *   <li>Parts other than the final part may start with a digit, as mandated by <a
   *       href="https://tools.ietf.org/html/rfc1123#section-2">RFC 1123</a>.
   * </ul>
   *
   * @param domain A domain name (not IP address)
   * @throws IllegalArgumentException if {@code domain} is not syntactically valid according to
   *     {@link #isValid}

### Incluir uma *operação de rota*

Também podemos adicionar *operações de rota* diretamente ao aplicativo `FastAPI`.

Aqui fazemos isso... só para mostrar que podemos 🤷:

```Python hl_lines="21-23" title="app/main.py"
{!../../docs_src/bigger_applications/app/main.py!}
```

e funcionará corretamente, junto com todas as outras *operações de rota* adicionadas com `app.include_router()`.

   * // -> ["a", "c", "b"]
   * // -> ["b", "a", "c"]
   * // -> ["b", "c", "a"]
   * // -> ["c", "a", "b"]
   * // -> ["c", "b", "a"]
   *
   * for (List<Integer> perm : orderedPermutations(asList(1, 2, 2, 1))) {
   *   println(perm);
   * }
   * // -> [1, 1, 2, 2]
   * // -> [1, 2, 1, 2]
   * // -> [1, 2, 2, 1]
   * // -> [2, 1, 1, 2]
   * // -> [2, 1, 2, 1]
   * // -> [2, 2, 1, 1]
   * }</pre>

//// tab | 🐍 3️⃣.6️⃣ & 🔛

```Python hl_lines="14-22"
{!> ../../docs_src/sql_databases/sql_app/alt_main.py!}
```

////

//// tab | 🐍 3️⃣.9️⃣ & 🔛

```Python hl_lines="12-20"
{!> ../../docs_src/sql_databases/sql_app_py39/alt_main.py!}
```

////

/// info

👥 🚮 🏗 `SessionLocal()` & 🚚 📨 `try` 🍫.

 & ⤴️ 👥 🔐 ⚫️ `finally` 🍫.

			malformedBody:       false,
			ignoreContentLength: true,
		},
		// Failed with entity too small.
		{
			objectName:          "test",
			data:                bytes.Repeat([]byte("a"), 1023),
			expectedRespStatus:  http.StatusBadRequest,
			accessKey:           credentials.AccessKey,
			secretKey:           credentials.SecretKey,
			malformedBody:       false,
			ignoreContentLength: false,
		},

  //   - Expression accessing a property named "redact__d": {"Expression": "object.redact__underscores__d > 0"}
  //
  // Equality on arrays with list type of 'set' or 'map' ignores element order, i.e. [1, 2] == [2, 1].
  // Concatenation on arrays with x-kubernetes-list-type use the semantics of the list type:
  //   - 'set': `X + Y` performs a union where the array positions of all elements in `X` are preserved and

   *   <li>Underscores ('_') are permitted wherever dashes ('-') are permitted.
   *   <li>Parts other than the final part may start with a digit, as mandated by <a
   *       href="https://tools.ietf.org/html/rfc1123#section-2">RFC 1123</a>.
   * </ul>
   *
   * @param domain A domain name (not IP address)
   * @throws IllegalArgumentException if {@code domain} is not syntactically valid according to
   *     {@link #isValid}

				8:  {vDelMarker, vObj}, // disk 8
				9:  {vDelMarker, vObj}, // disk 9
				10: {vObj},             // disk 10
				11: {vDelMarker, vObj}, // disk 11
				12: {vDelMarker, vObj}, // disk 12
				13: {vDelMarker, vObj}, // disk 13
				14: {vDelMarker, vObj}, // disk 14
				15: {vDelMarker, vObj}, // disk 15
			},
			quorum:      7,
			reqVersions: 0,

“中间件”基本上是一个对每个请求都执行的函数，其中一些代码在端点函数之前执行，另一些代码在端点函数之后执行。

### 创建中间件

我们要添加的中间件（只是一个函数）将为每个请求创建一个新的 SQLAlchemy`SessionLocal`，将其添加到请求中，然后在请求完成后关闭它。

//// tab | Python 3.9+

```Python hl_lines="12-20"
{!> ../../docs_src/sql_databases/sql_app_py39/alt_main.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="14-22"
{!> ../../docs_src/sql_databases/sql_app/alt_main.py!}
```

		{"test-bucket-list-object", "Asia", "A", "", 1, resultCases[4], nil, true},
		// Setting a non-existing directory to be prefix (12-13).
		{"empty-bucket", "europe/france/", "", "", 1, ListObjectsInfo{}, nil, true},
		{"empty-bucket", "africa/tunisia/", "", "", 1, ListObjectsInfo{}, nil, true},