* CacheLoader#reload}.
   *
   * <p>As the default implementation of {@link CacheLoader#reload} is synchronous, it is
   * recommended that users of this method override {@link CacheLoader#reload} with an asynchronous
   * implementation; otherwise refreshes will be performed during unrelated cache read and write
   * operations.
   *

/// warning | 警告

如果您的应用程序依赖于生命周期事件， `AsyncClient` 将不会触发这些事件。为了确保它们被触发，请使用 [florimondmanca/asgi-lifespan](https://github.com/florimondmanca/asgi-lifespan#usage) 中的 `LifespanManager` 。

///

## 其他异步函数调用 { #other-asynchronous-function-calls }

由于测试函数现在是异步的，因此除了在测试中向 FastAPI 应用程序发送请求之外，您现在还可以调用（和使用 `await` 等待）其他 `async` 异步函数，就和您在代码中的其他任何地方调用它们的方法一样。

/// tip | 提示

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.

在主要教學中你已學過如何將[自訂中介軟體](../tutorial/middleware.md)加入到你的應用程式。

你也讀過如何處理 [使用 `CORSMiddleware` 的 CORS](../tutorial/cors.md)。

本節將示範如何使用其他中介軟體。

## 新增 ASGI 中介軟體 { #adding-asgi-middlewares }

由於 **FastAPI** 建立在 Starlette 上並實作了 <abbr title="Asynchronous Server Gateway Interface - 非同步伺服器閘道介面">ASGI</abbr> 規範，你可以使用任何 ASGI 中介軟體。

中介軟體不一定要為 FastAPI 或 Starlette 專門撰寫，只要遵循 ASGI 規範即可運作。

一般來說，ASGI 中介軟體是類別，預期第一個參數接收一個 ASGI 應用程式。

因此，在第三方 ASGI 中介軟體的文件中，通常會指示你這樣做：

## Сервери ASGI { #asgi-servers }

Розгляньмо деталі.

FastAPI використовує стандарт для побудови Python вебфреймворків і серверів під назвою <abbr title="Asynchronous Server Gateway Interface - Асинхронний шлюзовий інтерфейс сервера">ASGI</abbr>. FastAPI - це ASGI вебфреймворк.

## ASGI‑серверы { #asgi-servers }

Давайте немного углубимся в детали.

FastAPI использует стандарт для построения Python‑веб‑фреймворков и серверов под названием <abbr title="Asynchronous Server Gateway Interface – Асинхронный шлюзовый интерфейс сервера">ASGI</abbr>. FastAPI — ASGI-веб‑фреймворк.

///

/// tip

If you want to call `async` functions in your tests apart from sending requests to your FastAPI application (e.g. asynchronous database functions), have a look at the [Async Tests](../advanced/async-tests.md) in the advanced tutorial.

///

## Separating tests { #separating-tests }

## ASGI Sunucuları { #asgi-servers }

Şimdi biraz daha detaya inelim.

FastAPI, Python web framework'leri ve sunucularını inşa etmek için kullanılan <abbr title="Asynchronous Server Gateway Interface - Asenkron Sunucu Ağ Geçidi Arayüzü">ASGI</abbr> adlı bir standardı kullanır. FastAPI bir ASGI web framework'üdür.

 * when responses are of an unexpected type or cannot be decoded.
 *
 * Other exception types cancel the current call:
 *
 *  * For synchronous calls made with [Call.execute], the exception is propagated to the caller.
 *
 *  * For asynchronous calls made with [Call.enqueue], an [IOException] is propagated to the caller
 *    indicating that the call was canceled. The interceptor's exception is delivered to the current

## 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.