## ASGI Servers { #asgi-servers }

Let's go a little deeper into the details.

FastAPI uses a standard for building Python web frameworks and servers called <abbr title="Asynchronous Server Gateway Interface">ASGI</abbr>. FastAPI is an ASGI web framework.

 * ListenableFuture}</a>.
 *
 * <p>This class is GWT-compatible.
 *
 * <h3>Purpose</h3>
 *
 * <p>The main purpose of {@code ListenableFuture} is to help you chain together a graph of
 * asynchronous operations. You can chain them together manually with calls to methods like {@link
 * Futures#transform(ListenableFuture, com.google.common.base.Function, Executor) Futures.transform}

 * ListenableFuture}</a>.
 *
 * <p>This class is GWT-compatible.
 *
 * <h3>Purpose</h3>
 *
 * <p>The main purpose of {@code ListenableFuture} is to help you chain together a graph of
 * asynchronous operations. You can chain them together manually with calls to methods like {@link
 * Futures#transform(ListenableFuture, com.google.common.base.Function, Executor) Futures.transform}

Vamos ver aquela frase por partes nas seções abaixo:

* **Código assíncrono**
* **`async` e `await`**
* **Corrotinas**

## Código assíncrono { #asynchronous-code }

             to quit<b>)</b>
```

</div>

这在大多数情况下都能正常运行。😎

例如，您可以使用该命令在容器、服务器等环境中启动您的 **FastAPI** 应用。

## ASGI 服务器

让我们深入了解一些细节。

FastAPI 使用了一种用于构建 Python Web 框架和服务器的标准，称为 <abbr title="Asynchronous Server Gateway Interface，异步服务器网关接口">ASGI</abbr>。FastAPI 本质上是一个 ASGI Web 框架。

要在远程服务器上运行 **FastAPI** 应用（或任何其他 ASGI 应用），您需要一个 ASGI 服务器程序，例如 **Uvicorn**。它是 `fastapi` 命令默认使用的 ASGI 服务器。

除此之外，还有其他一些可选的 ASGI 服务器，例如：

Nehmen wir obigen Satz in den folgenden Abschnitten Schritt für Schritt unter die Lupe:

* **Asynchroner Code**
* **`async` und `await`**
* **Coroutinen**

## Asynchroner Code { #asynchronous-code }

			objInfo := fi.ToObjectInfo(bucket, object, versioned)

			evt := evalActionFromLifecycle(ctx, *lc, lr, rcfg, objInfo)
			switch {
			case evt.Action.DeleteRestored(): // if restored copy has expired, delete it synchronously
				applyExpiryOnTransitionedObject(ctx, z, objInfo, evt, lcEventSrc_Decom)
				return false
			case evt.Action.Delete():
				globalExpiryState.enqueueByDays(objInfo, evt, lcEventSrc_Decom)
				return true

        }
      }
    ```

### Asynchronous Get ([.kt][AsynchronousGetKotlin], [.java][AsynchronousGetJava])

Download a file on a worker thread, and get called back when the response is readable. The callback is made after the response headers are ready. Reading the response body may still block. OkHttp doesn't currently offer asynchronous APIs to receive a response body in parts.

 *
 * ```java
 * Call call = client.newCall(request);
 * try (Response response = call.execute()) {
 * ... // Use the response.
 * }
 * ```
 *
 * You can use a similar block for asynchronous calls:
 *
 * ```java
 * Call call = client.newCall(request);
 * call.enqueue(new Callback() {
 *   public void onResponse(Call call, Response response) throws IOException {

import java.time.Duration;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * An object with an operational state, plus asynchronous {@link #startAsync()} and {@link
 * #stopAsync()} lifecycle methods to transition between states. Example services include
 * webservers, RPC servers and timers.
 *
 * <p>The normal lifecycle of a service is:
 *