# 在云上部署 FastAPI

您几乎可以使用**任何云服务商**来部署 FastAPI 应用程序。

在大多数情况下，主要的云服务商都有部署 FastAPI 的指南。

## 云服务商 - 赞助商

一些云服务商 ✨ [**赞助 FastAPI**](../help-fastapi.md#sponsor-the-author){.internal-link target=_blank} ✨，这确保了FastAPI 及其**生态系统**持续健康地**发展**。

这表明了他们对 FastAPI 及其**社区**（您）的真正承诺，因为他们不仅想为您提供**良好的服务**，而且还想确保您拥有一个**良好且健康的框架**：FastAPI。 🙇

您可能想尝试他们的服务并阅读他们的指南：

Oder Sie belegen einfach lieber andere Kurse, weil diese besser zu Ihrem Lernstil passen.

Einige Kursanbieter ✨ [**sponsern FastAPI**](../help-fastapi.md#den-autor-sponsern){.internal-link target=_blank} ✨, dies gewährleistet die kontinuierliche und gesunde **Entwicklung** von FastAPI und seinem **Ökosystem**.

Or it might be the case that you just prefer to take other courses because they adapt better to your learning style.

Some course providers ✨ [**sponsor FastAPI**](../help-fastapi.md#sponsor-the-author){.internal-link target=_blank} ✨, this ensures the continued and healthy **development** of FastAPI and its **ecosystem**.

Но, тем не менее, грядёт добавление ещё многих улучшений и возможностей.

У **FastAPI** великое будущее.

!!! tip "Tipp"
    Sie können <a href="https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/commenting-on-a-pull-request" class="external-link" target="_blank">Kommentare mit Änderungsvorschlägen</a> zu vorhandenen Pull Requests hinzufügen.

Muitos desenvolvedores e times já dependem do **FastAPI** para seus projetos (incluindo eu e meu time).

Mas ainda há muitas melhorias e funcionalidades a vir.

**FastAPI** tem um grande futuro à frente.

!!! check
    The `prefix`, `tags`, `responses`, and `dependencies` parameters are (as in many other cases) just a feature from **FastAPI** to help you avoid code duplication.

### Import the dependencies

This code lives in the module `app.routers.items`, the file `app/routers/items.py`.

```Python hl_lines="1  4"
{!../../../docs_src/python_types/tutorial009.py!}
```

Using `Optional[str]` instead of just `str` will let the editor help you detecting errors where you could be assuming that a value is always a `str`, when it could actually be `None` too.

`Optional[Something]` is actually a shortcut for `Union[Something, None]`, they are equivalent.

    Using these `dependencies` in the *path operation decorator* you can make sure they are executed while avoiding editor/tooling errors.

    It might also help avoid confusion for new developers that see an unused parameter in your code and could think it's unnecessary.

!!! info
    In this example we use invented custom headers `X-Key` and `X-Token`.

!!! tip "Подсказка"
    Вы можете <a href="https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/commenting-on-a-pull-request" class="external-link" target="_blank">добавлять комментарии с предложениями по изменению</a> в существующие пул-реквесты.