多くのフレームワークやシステムでは、セキュリティと認証を処理するだけで、膨大な労力とコードが必要になります（多くの場合、書かれた全コードの50%以上を占めることがあります）。

**FastAPI** は、セキュリティの仕様をすべて勉強して学ぶことなく、標準的な方法で簡単に、迅速に**セキュリティ**を扱うためのツールをいくつか提供します。

しかし、その前に、いくつかの小さな概念を確認しましょう。

## お急ぎですか？ { #in-a-hurry }

もし、これらの用語に興味がなく、ユーザー名とパスワードに基づく認証でセキュリティを**今すぐ**確保する必要がある場合は、次の章に進んでください。

## OAuth2 { #oauth2 }

OAuth2は、認証と認可を処理するためのいくつかの方法を定義した仕様です。

かなり広範囲な仕様で、いくつかの複雑なユースケースをカバーしています。

你可以在普通的 `def` *路径操作函数*中声明 `async def` 的依赖项；也可以在异步的 `async def` *路径操作函数*中声明普通的 `def` 依赖项，等等。

都没关系，**FastAPI** 知道该怎么处理。

/// note | 注意

如果不了解异步，请参阅文档中关于 `async` 和 `await` 的章节：[异步：*“着急了？”*](../../async.md#in-a-hurry)。

///

## 与 OpenAPI 集成 { #integrated-with-openapi }

依赖项及子依赖项中声明的所有请求、验证和需求都会集成到同一个 OpenAPI 模式中。

因此，交互式文档中也会包含这些依赖项的所有信息：

<img src="/img/tutorial/dependencies/image01.png">

{* ../../docs_src/first_steps/tutorial003_py310.py hl[7] *}

/// note | Not

Eğer farkı bilmiyorsanız, [Async: *"Aceleniz mi var?"*](../async.md#in-a-hurry) sayfasına bakın.

///

### Adım 5: içeriği döndürün { #step-5-return-the-content }

{* ../../docs_src/first_steps/tutorial001_py310.py hl[8] *}

			if qs.QStats.Avg.Count > 0 || qs.QStats.Curr.Count > 0 {
				qt := qs.QStats
				currInQueueBytes.Value = qt.Curr.Bytes
				currInQueueCount.Value = qt.Curr.Count
				avgQueueBytes.Value = qt.Avg.Bytes
				avgQueueCount.Value = qt.Avg.Count
				maxQueueBytes.Value = qt.Max.Bytes
				maxQueueCount.Value = qt.Max.Count
			}
			activeWorkersCount.Value = float64(qs.ActiveWorkers.Curr)

      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and

Peu importe. **FastAPI** saura quoi faire.

/// note | Remarque

Si vous ne savez pas, consultez la section [Async : *« Pressé ? »*](../../async.md#in-a-hurry) à propos de `async` et `await` dans la documentation.

///

## Intégrer à OpenAPI { #integrated-with-openapi }

Détails sur la syntaxe `async def` pour les *fonctions de chemin d'accès* et quelques rappels sur le code asynchrone, la concurrence et le parallélisme.

## Vous êtes pressés ? { #in-a-hurry }

<abbr title="too long; didn't read - trop long ; pas lu"><strong>TL;DR :</strong></abbr>

Si vous utilisez des bibliothèques tierces qui nécessitent d'être appelées avec `await`, telles que :

```Python

      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and

      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and

      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and