Wir könnten das OpenAPI-JSON in eine Datei `openapi.json` herunterladen und dann mit einem Skript wie dem folgenden **den präfixierten Tag entfernen**:

{* ../../docs_src/generate_clients/tutorial004_py39.py *}

//// tab | Node.js

```Javascript
{!> ../../docs_src/generate_clients/tutorial004.js!}
```

////

Poderíamos baixar o JSON do OpenAPI para um arquivo `openapi.json` e então poderíamos **remover essa tag prefixada** com um script como este:

{* ../../docs_src/generate_clients/tutorial004_py39.py *}

//// tab | Node.js

```Javascript
{!> ../../docs_src/generate_clients/tutorial004.js!}
```

////

{* ../../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:

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] *}

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] *}

{* ../../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:

Podríamos descargar el JSON de OpenAPI a un archivo `openapi.json` y luego podríamos **remover ese tag prefijado** con un script como este:

{* ../../docs_src/generate_clients/tutorial004_py39.py *}

//// tab | Node.js

```Javascript
{!> ../../docs_src/generate_clients/tutorial004.js!}
```

////

If you don't want **FastAPI** to include an automatic server using the `root_path`, you can use the parameter `root_path_in_servers=False`:

{* ../../docs_src/behind_a_proxy/tutorial004_py39.py hl[9] *}

and then it won't include it in the OpenAPI schema.

## Mounting a sub-application { #mounting-a-sub-application }

from docs_src.generate_clients import tutorial003_py39


def test_remove_tags(tmp_path: pathlib.Path):
    tmp_file = tmp_path / "openapi.json"
    openapi_json = tutorial003_py39.app.openapi()
    tmp_file.write_text(json.dumps(openapi_json))

    with patch("pathlib.Path", return_value=tmp_file):
        importlib.import_module("docs_src.generate_clients.tutorial004_py39")

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__")