For those cases, you can use the `jsonable_encoder` to convert your data before passing it to a response:

{* ../../docs_src/response_directly/tutorial001_py310.py hl[5:6,20:21] *}

/// note | Technical Details

You could also use `from starlette.responses import JSONResponse`.

## OpenAPI Extra { #openapi-extra }

When you declare a *path operation* in your application, **FastAPI** automatically generates the relevant metadata about that *path operation* to be included in the OpenAPI schema.

/// note | Technical details

In the OpenAPI specification it is called the <a href="https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#operation-object" class="external-link" target="_blank">Operation Object</a>.

///

## Create a `websocket` { #create-a-websocket }

In your **FastAPI** application, create a `websocket`:

{* ../../docs_src/websockets/tutorial001_py39.py hl[1,46:47] *}

/// note | Technical Details

You could also use `from starlette.websockets import WebSocket`.

**FastAPI** provides the same `WebSocket` directly just as a convenience for you, the developer. But it comes directly from Starlette.

///

        }
        return context.get(key);
    }

    /**
     * Sets the project's class realm. <strong>Warning:</strong> This is an internal utility method that is only public
     * for technical reasons, it is not part of the public API. In particular, this method can be changed or deleted
     * without prior notice and must not be used by plugins.
     *

Com `openapi_examples` adicionado a `Body()`, o `/docs` ficaria assim:

<img src="/img/tutorial/body-fields/image02.png">

## Detalhes Técnicos { #technical-details }

/// tip | Dica

Se você já está usando o **FastAPI** na versão **0.99.0 ou superior**, você provavelmente pode **pular** esses detalhes.

Con `openapi_examples` añadido a `Body()`, los `/docs` se verían así:

<img src="/img/tutorial/body-fields/image02.png">

## Detalles Técnicos { #technical-details }

/// tip | Consejo

Si ya estás usando la versión **0.99.0 o superior** de **FastAPI**, probablemente puedes **omitir** estos detalles.

Поэтому теперь рекомендуется использовать `lifespan`, как описано выше.

## Технические детали { #technical-details }

Немного технических подробностей для любопытных умников. 🤓

**FastAPI** will know that it can use this dependency to define a "security scheme" in the OpenAPI schema (and the automatic API docs).

/// info | Technical Details

But for security, as the server doesn't know it is behind a trusted proxy, it won't interpret those headers.

/// note | Technical Details

The proxy headers are:

* <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/X-Forwarded-For" class="external-link" target="_blank">X-Forwarded-For</a>

Pero al seguir los pasos anteriores, podrá hacer algunas optimizaciones de rendimiento.

## Detalles Técnicos { #technical-details }

Las versiones modernas de Python tienen soporte para **"código asíncrono"** utilizando algo llamado **"coroutines"**, con la sintaxis **`async` y `await`**.