- reference/index.md
  - reference/fastapi.md
  - reference/parameters.md
  - reference/status.md
  - reference/uploadfile.md
  - reference/exceptions.md
  - reference/dependencies.md
  - reference/apirouter.md
  - reference/background.md
  - reference/request.md
  - reference/websockets.md
  - reference/httpconnection.md
  - reference/response.md
  - reference/responses.md
  - reference/middleware.md

{"message": "Hello World"}
```

...👉 📨 🔜 📨:

```json
{
  "message": "Hello World"
}
```

↗️, 👆 🔜 🎲 🔎 🌅 👍 🌌 ✊ 📈 👉 🌘 ❕ 🎻. 👶

## 🔢 📨 🎓

🕐❔ 🏗 **FastAPI** 🎓 👐 ⚖️ `APIRouter` 👆 💪 ✔ ❔ 📨 🎓 ⚙️ 🔢.

🔢 👈 🔬 👉 `default_response_class`.

🖼 🔛, **FastAPI** 🔜 ⚙️ `ORJSONResponse` 🔢, 🌐 *➡ 🛠️*, ↩️ `JSONResponse`.

```Python hl_lines="2  4"

ファイルレスポンスには、適切な `Content-Length` 、 `Last-Modified` 、 `ETag` ヘッダーが含まれます。

```Python hl_lines="2  10"
{!../../docs_src/custom_response/tutorial009.py!}
```

## デフォルトレスポンスクラス

**FastAPI** クラスのインスタンスか `APIRouter` を生成するときに、デフォルトのレスポンスクラスを指定できます。

定義するためのパラメータは、 `default_response_class` です。

以下の例では、 **FastAPI** は、全ての *path operation* で `JSONResponse` の代わりに `ORJSONResponse` をデフォルトとして利用します。

```Python hl_lines="2  4"

Natürlich werden Sie wahrscheinlich viel bessere Möglichkeiten finden, Vorteil daraus zu ziehen, als JSON zu formatieren. 😉

## Standard-Response-Klasse

Beim Erstellen einer **FastAPI**-Klasseninstanz oder eines `APIRouter`s können Sie angeben, welche Response-Klasse standardmäßig verwendet werden soll.

Der Parameter, der das definiert, ist `default_response_class`.

}
```

Of course, you will probably find much better ways to take advantage of this than formatting JSON. 😉

## Default response class

When creating a **FastAPI** class instance or an `APIRouter` you can specify which response class to use by default.

The parameter that defines this is `default_response_class`.

Obviamente, você provavelmente vai encontrar maneiras muito melhores de se aproveitar disso do que a formatação de JSON. 😉

## Classe de resposta padrão

Quando você criar uma instância da classe **FastAPI** ou um `APIRouter` você pode especificar qual classe de resposta utilizar por padrão.

O padrão que define isso é o `default_response_class`.

```Python
from fastapi import APIRouter, Depends


async def some_dependency():
    return


router = APIRouter(prefix="/users", dependencies=[Depends(some_dependency)])
```

**In `include_router`**

Most of these settings are now supported in `APIRouter`, which normally lives closer to the related code, so it is recommended to use `APIRouter` when possible.