```Python hl_lines="8"
{!../../docs_src/events/tutorial001.py!}
```

👉 💼, `startup` 🎉 🐕‍🦺 🔢 🔜 🔢 🏬 "💽" ( `dict`) ⏮️ 💲.

👆 💪 🚮 🌅 🌘 1️⃣ 🎉 🐕‍🦺 🔢.

& 👆 🈸 🏆 🚫 ▶️ 📨 📨 ⏭ 🌐 `startup` 🎉 🐕‍🦺 ✔️ 🏁.

### `shutdown` 🎉

🚮 🔢 👈 🔜 🏃 🕐❔ 🈸 🤫 🔽, 📣 ⚫️ ⏮️ 🎉 `"shutdown"`:

```Python hl_lines="6"
{!../../docs_src/events/tutorial002.py!}
```

Auch wenn Ihr gesamter Code unter der Annahme geschrieben ist, dass es nur `/app` gibt.

```Python hl_lines="6"
{!../../docs_src/behind_a_proxy/tutorial001.py!}
```

```Python hl_lines="9-13  36-53"
{!../../docs_src/openapi_webhooks/tutorial001.py!}
```

The webhooks that you define will end up in the **OpenAPI** schema and the automatic **docs UI**.

/// info

from dirty_equals import IsDict
from fastapi.testclient import TestClient

from docs_src.dataclasses.tutorial001 import app

client = TestClient(app)


def test_post_item():
    response = client.post("/items/", json={"name": "Foo", "price": 3})
    assert response.status_code == 200
    assert response.json() == {
        "name": "Foo",
        "price": 3,
        "description": None,
        "tax": None,
    }

```Python hl_lines="2  6"
{!../../docs_src/advanced_middleware/tutorial001.py!}
```

## `TrustedHostMiddleware`

Enforces that all incoming requests have a correctly set `Host` header, in order to guard against HTTP Host Header attacks.

```Python hl_lines="2  6-8"
{!../../docs_src/advanced_middleware/tutorial002.py!}
```

The following arguments are supported:

//// tab | Python 3.8+ non-Annotated

/// tip | "Подсказка"

Настоятельно рекомендуем использовать `Annotated` версию насколько это возможно.

///

```Python hl_lines="8-11"
{!> ../../docs_src/dependencies/tutorial001.py!}
```

////

**И всё.**

**2 строки.**

И теперь она той же формы и структуры, что и все ваши *функции обработки пути*.

{!> ../../docs_src/extra_models/tutorial001_py310.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="9  11  16  22  24  29-30  33-35  40-41"
{!> ../../docs_src/extra_models/tutorial001.py!}
```

////

### Про `**user_in.dict()`

#### `.dict()` из Pydantic

`user_in` - это Pydantic-модель класса `UserIn`.

```

////

//// tab | Python 3.8+ non-Annotated

/// tip

Préférez utiliser la version `Annotated` si possible.

///

```Python hl_lines="19-21"
{!> ../../docs_src/body_multiple_params/tutorial001.py!}
```

////

/// note

Notez que, dans ce cas, le paramètre `item` provenant du `Body` est optionnel (sa valeur par défaut est `None`).

///

## Paramètres multiples du body

//// tab | Python 3.8 and above

```Python hl_lines="9  11  16  22  24  29-30  33-35  40-41"
{!> ../../docs_src/extra_models/tutorial001.py!}
```

////

//// tab | Python 3.10 and above

```Python hl_lines="7  9  14  20  22  27-28  31-33  38-39"
{!> ../../docs_src/extra_models/tutorial001_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="30-35"
{!> ../../docs_src/body_updates/tutorial001_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="30-35"
{!> ../../docs_src/body_updates/tutorial001.py!}
```

////

`PUT` wird verwendet, um Daten zu empfangen, die die existierenden Daten ersetzen sollen.

### Warnung bezüglich des Ersetzens