## Otimizar Desempenho da Resposta - Modelo de Resposta - Tipo de Retorno { #optimize-response-performance-response-model-return-type }

Para otimizar o desempenho ao retornar dados JSON, use um tipo de retorno ou modelo de resposta; assim, o Pydantic fará a serialização para JSON no lado do Rust, sem passar pelo Python. Leia mais na documentação de [Tutorial - Modelo de Resposta - Tipo de Retorno](../tutorial/response-model.md).

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Es gibt jedoch bestimmte Fälle, in denen es nützlich ist, auf das `Request`-Objekt zuzugreifen.

## Das `Request`-Objekt direkt verwenden { #use-the-request-object-directly }

Angenommen, Sie möchten auf die IP-Adresse/den Host des Clients in Ihrer *Pfadoperation-Funktion* zugreifen.

Dazu müssen Sie direkt auf den Request zugreifen.

# Cookies de réponse { #response-cookies }

## Utiliser un paramètre `Response` { #use-a-response-parameter }

Vous pouvez déclarer un paramètre de type `Response` dans votre *fonction de chemin d'accès*.

Vous pouvez ensuite définir des cookies dans cet objet de réponse *temporaire*.

{* ../../docs_src/response_cookies/tutorial002_py310.py hl[1, 8:9] *}

Mas há situações específicas onde é útil utilizar o objeto `Request`.

## Utilize o objeto `Request` diretamente { #use-the-request-object-directly }

Vamos imaginar que você deseja obter o endereço de IP/host do cliente dentro da sua *função de operação de rota*.

Para isso você precisa acessar a requisição diretamente.

Коди статусу в діапазоні 400 означають, що сталася помилка з боку клієнта.

Пам'ятаєте всі ці помилки **«404 Not Found»** (і жарти про них)?

## Використання `HTTPException` { #use-httpexception }

Щоб повернути HTTP-відповіді з помилками клієнту, використовуйте `HTTPException`.

### Імпорт `HTTPException` { #import-httpexception }

{* ../../docs_src/handling_errors/tutorial001_py310.py hl[1] *}