### Install `pydantic-settings` { #install-pydantic-settings }

First, make sure you create your [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install the `pydantic-settings` package:

<div class="termy">

```console

Qualquer função que possa ser utilizada com:

* <a href="https://docs.python.org/3/library/contextlib.html#contextlib.contextmanager" class="external-link" target="_blank">`@contextlib.contextmanager`</a> ou
* <a href="https://docs.python.org/3/library/contextlib.html#contextlib.asynccontextmanager" class="external-link" target="_blank">`@contextlib.asynccontextmanager`</a>

pode ser utilizada como uma dependência do **FastAPI**.

* <a href="https://www.uvicorn.org/" class="external-link" target="_blank">Uvicorn</a> : un serveur ASGI haute performance.
* <a href="https://hypercorn.readthedocs.io/" class="external-link" target="_blank">Hypercorn</a> : un serveur
  ASGI compatible avec HTTP/2 et Trio entre autres fonctionnalités.
* <a href="https://github.com/django/daphne" class="external-link" target="_blank">Daphne</a> : le serveur ASGI
  conçu pour Django Channels.

    * <a href="https://fastapi.tiangolo.com/features/" class="external-link" target="_blank">**Viele weitere Funktionen**</a>, einschließlich automatischer Validierung, Serialisierung, interaktiver Dokumentation, Authentifizierung...

    <div class="md-copyright__highlight">
        The FastAPI trademark is owned by <a href="https://tiangolo.com" target="_blank">@tiangolo</a> and is registered in the US and across other regions
    </div>
    {% if not config.extra.generator == false %}
    Made with
    <a href="https://squidfunk.github.io/mkdocs-material/" target="_blank" rel="noopener">
        Material for MkDocs
    </a>
    {% endif %}

///

## Anwendungsfälle

Einige Anwendungsfälle sind:

* Konvertieren von Nicht-JSON-Requestbodys nach JSON (z. B. <a href="https://msgpack.org/index.html" class="external-link" target="_blank">`msgpack`</a>).
* Dekomprimierung gzip-komprimierter Requestbodys.
* Automatisches Loggen aller Requestbodys.

## Handhaben von benutzerdefinierten Requestbody-Kodierungen

사용자 정의 헤더는 <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">'X-' 접두사를 사용</a>하여 추가할 수 있습니다.

그러나 만약 클라이언트의 브라우저에서 볼 수 있는 사용자 정의 헤더를 가지고 있다면, 그것들을 CORS 설정([CORS (Cross-Origin Resource Sharing)](cors.md){.internal-link target=_blank})에 <a href="https://www.starlette.io/middleware/#corsmiddleware" class="external-link" target="_blank">Starlette CORS 문서</a>에 명시된 `expose_headers` 매개변수를 이용하여 헤더들을 추가하여야합니다.

///

# Gelişmiş Güvenlik

## Ek Özellikler

[Tutorial - User Guide: Security](../../tutorial/security/index.md){.internal-link target=_blank} sayfasında ele alınanların dışında güvenlikle ilgili bazı ek özellikler vardır.

/// tip | İpucu

Sonraki bölümler **mutlaka "gelişmiş" olmak zorunda değildir**.

Kullanım şeklinize bağlı olarak, çözümünüz bu bölümlerden birinde olabilir.

///

## Önce Öğreticiyi Okuyun

    * <a href="https://fastapi.tiangolo.com/features/" class="external-link" target="_blank">**Множество других возможностей**</a> включая автоматическую проверку и сериализацию данных, интерактивную документацию, аутентификацию...

        assertEquals("Retention should be RUNTIME", RetentionPolicy.RUNTIME, retention.value());
    }

    // Test annotation target elements
    public void test_targetElements() {
        final Target target = UriType.class.getAnnotation(Target.class);
        assertNotNull("Target annotation should be present", target);