{* ../../docs_src/response_model/tutorial001_01_py310.py ln[15:17] hl[16] *}

## HTML Response { #html-response }

To return a response with HTML directly from **FastAPI**, use `HTMLResponse`.

* Import `HTMLResponse`.
* Pass `HTMLResponse` as the parameter `response_class` of your *path operation decorator*.

Bu gibi durumlarda, dönüş tipi yerine *path operation decorator* parametresi olan `response_model`’i kullanabilirsiniz.

`response_model` parametresini herhangi bir *path operation* içinde kullanabilirsiniz:

* `@app.get()`
* `@app.post()`
* `@app.put()`
* `@app.delete()`

{* ../../docs_src/response_model/tutorial001_01_py310.py ln[15:17] hl[16] *}

## Response HTML { #html-response }

Para devolver un response con HTML directamente desde **FastAPI**, usa `HTMLResponse`.

* Importa `HTMLResponse`.
* Pasa `HTMLResponse` como parámetro `response_class` de tu *path operation decorator*.

///

## Create a middleware { #create-a-middleware }

To create a middleware you use the decorator `@app.middleware("http")` on top of a function.

The middleware function receives:

* The `request`.
* A function `call_next` that will receive the `request` as a parameter.

 * one or more methods to modify the behavior of the backing iterator as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>{@code default} method warning:</b> This class forwards calls to <i>only some</i> {@code
 * default} methods. Specifically, it forwards calls only for methods that existed <a

 * override one or more methods to modify the behavior of the backing multimap as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>{@code default} method warning:</b> This class does <i>not</i> forward calls to {@code
 * default} methods. Instead, it inherits their default implementations. When those implementations

 * service. Subclasses should override one or more methods to modify the behavior of the backing
 * executor service as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>{@code default} method warning:</b> This class does <i>not</i> forward calls to {@code
 * default} methods. Instead, it inherits their default implementations. When those implementations

/// tip | İpucu

`callback_url` query parametresi, Pydantic'in [Url](https://docs.pydantic.dev/latest/api/networks/) tipini kullanır.

///

Tek yeni şey, *path operation decorator*'ına argüman olarak verilen `callbacks=invoices_callback_router.routes`. Bunun ne olduğuna şimdi bakacağız.

## Callback'i dokümante etmek { #documenting-the-callback }

 * override one or more methods to modify the behavior of the backing multimap as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>{@code default} method warning:</b> This class does <i>not</i> forward calls to {@code
 * default} methods. Instead, it inherits their default implementations. When those implementations

{* ../../docs_src/first_steps/tutorial001_py310.py hl[6] *}

`@app.get("/")` сообщает **FastAPI**, что функция прямо под ним отвечает за обработку запросов, поступающих:

* по пути `/`
* с использованием <dfn title="метод HTTP GET"><code>get</code> операции</dfn>

/// info | Информация о `@decorator`