**FastAPI** utilisera cette réponse *temporaire* pour extraire le code d'état (ainsi que les cookies et les en-têtes), et les placera dans la réponse finale qui contient la valeur que vous avez renvoyée, filtrée par tout `response_model`.

Ahora, ejecuta el comando `fastapi`:

<div class="termy">

```console
$ fastapi dev

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

Y abre la documentación en [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs).

Agora, execute o comando `fastapi`:

<div class="termy">

```console
$ fastapi dev

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

E abra a documentação em [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs).

然後你可以將環境變數 `OPENAPI_URL` 設為空字串，以停用 OpenAPI（包含文件 UI），如下：

<div class="termy">

```console
$ OPENAPI_URL= uvicorn main:app

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

之後若你造訪 `/openapi.json`、`/docs` 或 `/redoc`，會看到如下的 `404 Not Found` 錯誤：

```JSON
{
    "detail": "Not Found"
}

Now, run the `fastapi` command:

<div class="termy">

```console
$ fastapi dev

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

And open the docs at [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs).

You will see the automatic API docs for the main app, including only its own _path operations_:

     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Uvicorn running on <font color="#729FCF"><u style="text-decoration-style:solid">http://0.0.0.0:8000</u></font> <b>(</b>Press CTRL+C to
             quit<b>)</b>
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Started parent process <b>[</b><font color="#34E2E2"><b>27365</b></font><b>]</b>

接着，你可以通过把环境变量 `OPENAPI_URL` 设为空字符串来禁用 OpenAPI（包括文档 UI），例如：

<div class="termy">

```console
$ OPENAPI_URL= uvicorn main:app

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

然后如果你访问 `/openapi.json`、`/docs` 或 `/redoc`，就会得到一个 `404 Not Found` 错误，例如：

```JSON
{
    "detail": "Not Found"
}

Vous pouvez personnaliser plusieurs configurations de métadonnées dans votre application **FastAPI**.

## Métadonnées pour l'API { #metadata-for-api }

Vous pouvez définir les champs suivants qui sont utilisés dans la spécification OpenAPI et les interfaces utilisateur de documentation automatique de l’API :

| Paramètre | Type | Description |
|------------|------|-------------|
| `title` | `str` | Le titre de l’API. |

이제 `fastapi` 명령어를 실행하세요:

<div class="termy">

```console
$ fastapi dev

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

그리고 [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs)에서 문서를 여세요.

메인 앱의 자동 API 문서를 보게 될 것이며, 메인 앱 자체의 _경로 처리_만 포함됩니다:

<img src="/img/tutorial/sub-applications/image01.png">

// traverseAndHeal - traverses on-disk data and performs healing
// according to settings. At each "safe" point it also checks if an
// external quit signal has been received and quits if so. Since the
// healing traversal may be mutating on-disk data when an external
// quit signal is received, this routine cannot quit immediately and
// has to wait until a safe point is reached, such as between scanning
// two objects.