///

Eine <a href="https://de.wikipedia.org/wiki/Umgebungsvariable" class="external-link" target="_blank">Umgebungsvariable</a> (auch bekannt als „env var“) ist eine Variable, die sich außerhalb des Python-Codes im Betriebssystem befindet und von Ihrem Python-Code (oder auch von anderen Programmen) gelesen werden kann.

        String target = "TARGET";
        byte[] challenge = new byte[] {
            0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8
        };

        Type2Message t2 = new Type2Message(this.context, flags, challenge, target);
        Type2Message parsed = new Type2Message(t2.toByteArray());
        assertArrayEquals(challenge, parsed.getChallenge());
        assertEquals(target, parsed.getTarget());
    }

///

## その他のドキュメント

オプションの詳細については、Starletteのドキュメントを確認してください。

* <a href="https://www.starlette.io/websockets/" class="external-link" target="_blank"> `WebSocket` クラス</a>

/// tip | "Dica"

As próximas seções **não são necessariamente "avançadas"**.

E é possível que para o seu caso de uso, a solução está em uma delas.

///

## Leia o Tutorial primeiro

As próximas seções pressupõem que você já leu o principal [Tutorial - Guia de Usuário: Segurança](../../tutorial/security/index.md){.internal-link target=_blank}.

* <a href="https://docs.platform.sh/languages/python.html?utm_source=fastapi-signup&utm_medium=banner&utm_campaign=FastAPI-signup-June-2023" class="external-link" target="_blank">Platform.sh</a>

/// info

To receive uploaded files, first install <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>.

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install it, for example:

```console
$ pip install python-multipart
```

> 这个项目有怎样的历史？好像它只用了几周就从默默无闻变得众所周知……

在此，我们简单回顾一下 **FastAPI** 的历史。

## 备选方案

有那么几年，我曾领导数个开发团队为诸多复杂需求创建各种 API，这些需求包括机器学习、分布系统、异步任务、NoSQL 数据库等领域。

作为工作的一部分，我需要调研很多备选方案、还要测试并且使用这些备选方案。

**FastAPI** 其实只是延续了这些前辈的历史。

正如[备选方案](alternatives.md){.internal-link target=_blank}一章所述：

<blockquote markdown="1">

* 👆 💪 🤚 🗃 ⚪️➡️ 📂 📁.
* ⚫️ ✔️ <a href="https://docs.python.org/3/glossary.html#term-file-like-object" class="external-link" target="_blank">📁-💖</a> `async` 🔢.
* ⚫️ 🎦 ☑ 🐍 <a href="https://docs.python.org/3/library/tempfile.html#tempfile.SpooledTemporaryFile" class="external-link" target="_blank">`SpooledTemporaryFile`</a> 🎚 👈 👆 💪 🚶‍♀️ 🔗 🎏 🗃 👈 ⌛ 📁-💖 🎚.

### `UploadFile`

`UploadFile` ✔️ 📄 🔢:

* <a href="https://www.uvicorn.org/" class="external-link" target="_blank">Uvicorn</a>: um servidor ASGI de alta performance.
* <a href="https://hypercorn.readthedocs.io/" class="external-link" target="_blank">Hypercorn</a>: um servidor ASGI compátivel com HTTP/2, Trio e outros recursos.
* <a href="https://github.com/django/daphne" class="external-link" target="_blank">Daphne</a>: servidor ASGI construído para Django Channels.

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