Néanmoins, cela reste faisable dans **FastAPI**, via les outils internes de Starlette.

Et la documentation fonctionne quand même, bien qu'aucune section ne soit ajoutée pour dire que la paramètre devrait contenir un *chemin*.

### Convertisseur de *chemin*

En utilisant une option de Starlette directement, vous pouvez déclarer un *paramètre de chemin* contenant un *chemin* avec une URL comme :

```

/// info

You can read more about the Starlette `lifespan` handlers in <a href="https://www.starlette.dev/lifespan/" class="external-link" target="_blank">Starlette's  Lifespan' docs</a>.

Including how to handle lifespan state that can be used in other areas of your code.

///

## Sub Applications { #sub-applications }

Comme vous l'avez vu dans la documentation, FastAPI se tient sur les épaules des géants, Starlette et Pydantic.

Vous pouvez également parrainer :

* <a href="https://github.com/sponsors/samuelcolvin" class="external-link" target="_blank">Samuel Colvin (Pydantic)</a>
* <a href="https://github.com/sponsors/encode" class="external-link" target="_blank">Encode (Starlette, Uvicorn)</a>

---

/// note | Detalhes Técnicos

Você também pode usar `from starlette.middleware.cors import CORSMiddleware`.

**FastAPI** fornece vários middlewares em `fastapi.middleware` apenas como uma conveniência para você, o desenvolvedor. Mas a maioria dos middlewares disponíveis vêm diretamente da Starlette.

/// note | Технические детали

`FastAPI` — это класс, который напрямую наследуется от `Starlette`.

Вы можете использовать весь функционал <a href="https://www.starlette.dev/" class="external-link" target="_blank">Starlette</a> и в `FastAPI`.

///

### Шаг 2: создайте экземпляр `FastAPI` { #step-2-create-a-fastapi-instance }

{* ../../docs_src/first_steps/tutorial001.py hl[1] *}

`FastAPI` 是一个为你的 API 提供了所有功能的 Python 类。

/// note | 技术细节

`FastAPI` 是直接从 `Starlette` 继承的类。

你可以通过 `FastAPI` 使用所有的 <a href="https://www.starlette.dev/" class="external-link" target="_blank">Starlette</a> 的功能。

///

### 步骤 2：创建一个 `FastAPI`「实例」

{* ../../docs_src/first_steps/tutorial001.py hl[3] *}

这里的变量 `app` 会是 `FastAPI` 类的一个「实例」。

다음은 사용할 수 있는 몇가지 응답들 입니다.

`Response`를 사용하여 다른 어떤 것도 반환 할수 있으며, 직접 하위 클래스를 만들 수도 있습니다.

/// note | 기술 세부사항

`from starlette.responses import HTMLResponse`를 사용할 수도 있습니다.

**FastAPI**는 개발자인 여러분의 편의를 위해 `starlette.responses`를 `fastapi.responses`로 제공 하지만, 대부분의 사용 가능한 응답은 Starlette에서 직접 가져옵니다.

///

### `Response`

기본 `Response` 클래스는 다른 모든 응답 클래스의 부모 클래스 입니다.

이 클래스를 직접 반환할 수 있습니다.

import pytest
from fastapi import APIRouter, FastAPI
from fastapi.routing import APIRoute
from fastapi.testclient import TestClient
from starlette.routing import Route

app = FastAPI()


class APIRouteA(APIRoute):
    x_type = "A"


class APIRouteB(APIRoute):
    x_type = "B"


class APIRouteC(APIRoute):
    x_type = "C"


router_a = APIRouter(route_class=APIRouteA)
router_b = APIRouter(route_class=APIRouteB)

/// note | Technical Details

You could also use `from starlette.middleware.cors import CORSMiddleware`.

**FastAPI** provides several middlewares in `fastapi.middleware` just as a convenience for you, the developer. But most of the available middlewares come directly from Starlette.

**Typer** is FastAPI's little sibling. And it's intended to be the **FastAPI of CLIs**. ⌨️ 🚀

## Requirements

FastAPI stands on the shoulders of giants:

* <a href="https://www.starlette.dev/" class="external-link" target="_blank">Starlette</a> for the web parts.
* <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> for the data parts.

## Installation