## Create a TypeScript SDK { #create-a-typescript-sdk }

Let's start with a simple FastAPI application:

{* ../../docs_src/generate_clients/tutorial001_py39.py hl[7:9,12:13,16:17,21] *}

Notice that the *path operations* define the models they use for request payload and response payload, using the models `Item` and `ResponseMessage`.

### API Docs { #api-docs }

<img src="/img/tutorial/extending-openapi/image02.png">

Mas você pode desabilitá-lo definindo `syntaxHighlight` como `False`:

{* ../../docs_src/configure_swagger_ui/tutorial001_py39.py hl[3] *}

...e então o Swagger UI não mostrará mais o destaque de sintaxe:

<img src="/img/tutorial/extending-openapi/image03.png">

## Alterar o tema { #change-the-theme }

{* ../../docs_src/advanced_middleware/tutorial001_py39.py hl[2,6] *}

## `TrustedHostMiddleware` { #trustedhostmiddleware }

Enforces that all incoming requests have a correctly set `Host` header, in order to guard against HTTP Host Header attacks.

{* ../../docs_src/advanced_middleware/tutorial002_py39.py hl[2,6:8] *}

The following arguments are supported:

{* ../../docs_src/advanced_middleware/tutorial001_py39.py hl[2,6] *}

## `TrustedHostMiddleware` { #trustedhostmiddleware }

Гарантирует, что во всех входящих запросах корректно установлен `Host`‑заголовок, чтобы защититься от атак на HTTP‑заголовок Host.

{* ../../docs_src/advanced_middleware/tutorial002_py39.py hl[2,6:8] *}

Поддерживаются следующие аргументы:

Nesse caso, o path original `/app` seria servido em `/api/v1/app`.

Embora todo o seu código esteja escrito assumindo que existe apenas `/app`.

{* ../../docs_src/behind_a_proxy/tutorial001_py39.py hl[6] *}

Beginnen wir mit einem Beispiel und sehen es uns dann im Detail an.

Wir erstellen eine asynchrone Funktion `lifespan()` mit `yield` wie folgt:

{* ../../docs_src/events/tutorial003_py39.py hl[16,19] *}

@pytest.fixture(
    name="mod_name",
    params=[
        pytest.param("tutorial001_py39"),
        pytest.param("tutorial001_py310", marks=needs_py310),
        pytest.param("tutorial002_py39"),
        pytest.param("tutorial002_py310", marks=needs_py310),
        pytest.param("tutorial003_py39"),
        pytest.param("tutorial003_py310", marks=needs_py310),
    ],
)

Начнем с примера, а затем разберём его подробнее.

Мы создаём асинхронную функцию `lifespan()` с `yield` примерно так:

{* ../../docs_src/events/tutorial003_py39.py hl[16,19] *}

{* ../../docs_src/advanced_middleware/tutorial001_py39.py hl[2,6] *}

## `TrustedHostMiddleware` { #trustedhostmiddleware }

Erzwingt, dass alle eingehenden Requests einen korrekt gesetzten `Host`-Header haben, um sich vor HTTP-Host-Header-Angriffen zu schützen.

{* ../../docs_src/advanced_middleware/tutorial002_py39.py hl[2,6:8] *}

Die folgenden Argumente werden unterstützt:

import runpy
from unittest.mock import patch

import pytest


@pytest.mark.parametrize(
    "module_name",
    [
        "tutorial001_py39",
        "tutorial002_py39",
    ],
)
def test_run_module(module_name: str):
    with patch("builtins.print") as mock_print:
        runpy.run_module(f"docs_src.python_types.{module_name}", run_name="__main__")