## Servidores ASGI { #asgi-servers }

Vamos nos aprofundar um pouco mais em detalhes.

FastAPI utiliza um padrão para construir frameworks e servidores web em Python chamado <abbr title="Asynchronous Server Gateway Interface - Interface de Gateway de Servidor Assíncrono">ASGI</abbr>. FastAPI é um framework web ASGI.

- request (HTTP): запит
- response (HTTP): відповідь
- path operation: операція шляху
- path operation function: функція операції шляху
- prompt: підсказка
- check: перевірка
- Parallel Server Gateway Interface: Інтерфейс Шлюзу Паралельного Сервера
- Mozilla Developer Network: Мережа Розробників Mozilla
- tutorial: навчальний посібник
- advanced user guide: просунутий посібник користувача
- deep learning: глибоке навчання

    img: https://fastapi.tiangolo.com/img/sponsors/fastapicloud.png
gold:
  - url: https://blockbee.io?ref=fastapi
    title: BlockBee Cryptocurrency Payment Gateway
    img: https://fastapi.tiangolo.com/img/sponsors/blockbee.png
  - url: https://github.com/scalar/scalar/?utm_source=fastapi&utm_medium=website&utm_campaign=main-badge

        return null;
    }

    // ===================================================================================
    //                                                                    Property Gateway
    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property

        return null;
    }

    // ===================================================================================
    //                                                                    Property Gateway
    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property

用户指南介绍了如何为应用添加[自定义中间件](../tutorial/middleware.md)。

以及如何[使用 `CORSMiddleware` 处理 CORS](../tutorial/cors.md)。

本章学习如何使用其它中间件。

## 添加 ASGI 中间件 { #adding-asgi-middlewares }

因为 **FastAPI** 基于 Starlette，且执行 <abbr title="Asynchronous Server Gateway Interface - 异步服务器网关接口">ASGI</abbr> 规范，所以可以使用任意 ASGI 中间件。

中间件不必是专为 FastAPI 或 Starlette 定制的，只要遵循 ASGI 规范即可。

总之，ASGI 中间件是类，并把 ASGI 应用作为第一个参数。

因此，有些第三方 ASGI 中间件的文档推荐以如下方式使用中间件：

```Python

In this section we'll see how to use other middlewares.

## Adding ASGI middlewares { #adding-asgi-middlewares }

As **FastAPI** is based on Starlette and implements the <abbr title="Asynchronous Server Gateway Interface">ASGI</abbr> specification, you can use any ASGI middleware.

A middleware doesn't have to be made for FastAPI or Starlette to work, as long as it follows the ASGI spec.

        return null;
    }

    // ===================================================================================
    //                                                                    Property Gateway
    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property

        return null;
    }

    // ===================================================================================
    //                                                                    Property Gateway
    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property

      </a>
    </div>
  </div>
  <div id="announce-right" style="position: relative;">
    <div class="item">
      <a title="BlockBee Cryptocurrency Payment Gateway" style="display: block; position: relative;" href="https://blockbee.io?ref=fastapi" target="_blank">
        <span class="sponsor-badge">sponsor</span>
        <img class="sponsor-image" src="/img/sponsors/blockbee-banner.png" />