Nós criamos uma função assíncrona chamada `lifespan()` com `yield` como este:

```Python hl_lines="16  19"
{!../../docs_src/events/tutorial003.py!}
```

Aqui nós estamos simulando a *inicialização* custosa do carregamento do modelo colocando a (falsa) função de modelo no dicionário com modelos de _machine learning_ antes do `yield`. Este código será executado **antes** da aplicação **começar a receber requisições**, durante a *inicialização*.

                        saveBuffer();
                        const promptStart = line.indexOf(promptLiteralStart);
                        if (promptStart === -1) {
                            console.error("Custom prompt found but no end delimiter", line)
                        }
                        const prompt = line.slice(0, promptStart).replace(customPromptLiteralStart, "")

# AssumeRoleWithCustomToken [![Slack](https://slack.min.io/slack?type=svg)](https://slack.min.io)

## Introduction

To integrate with custom authentication methods using the [Identity Management Plugin](../iam/identity-management-plugin.md)), MinIO provides an STS API extension called `AssumeRoleWithCustomToken`.

After configuring the plugin, use the generated Role ARN with `AssumeRoleWithCustomToken` to get temporary credentials to access object storage.

* Decompressing gzip-compressed request bodies.
* Automatically logging all request bodies.

## Handling custom request body encodings

Let's see how to make use of a custom `Request` subclass to decompress gzip requests.

And an `APIRoute` subclass to use that custom request class.

### Create a custom `GzipRequest` class

/// tip

The same as when using a custom CDN, the first step is to disable the automatic docs, as those use the CDN by default.

To disable them, set their URLs to `None` when creating your `FastAPI` app:

{* ../../docs_src/custom_docs_ui/tutorial002.py hl[9] *}

### Include the custom docs for static files

And the same way as with a custom CDN, now you can create the *path operations* for the custom docs.

通过返回函数 `generate_html_response()` 的调用结果，你已经返回一个重载 **FastAPI** 默认行为的 `Response` 对象，

但如果你在 `response_class` 中也传入了 `HTMLResponse`，**FastAPI** 会知道如何在 OpenAPI 和交互式文档中使用 `text/html` 将其文档化为 HTML。

<img src="/img/tutorial/custom-response/image01.png">

## 可用响应

这里有一些可用的响应。

要记得你可以使用 `Response` 来返回任何其他东西，甚至创建一个自定义的子类。

/// note | "技术细节"

你也可以使用 `from starlette.responses import HTMLResponse`。

🛬 🏁 🤙 `generate_html_response()`, 👆 ⏪ 🛬 `Response` 👈 🔜 🔐 🔢 **FastAPI** 🎭.

✋️ 👆 🚶‍♀️ `HTMLResponse` `response_class` 💁‍♂️, **FastAPI** 🔜 💭 ❔ 📄 ⚫️ 🗄 & 🎓 🩺 🕸 ⏮️ `text/html`:

<img src="/img/tutorial/custom-response/image01.png">

## 💪 📨

📥 💪 📨.

✔️ 🤯 👈 👆 💪 ⚙️ `Response` 📨 🕳 🙆, ⚖️ ✍ 🛃 🎧-🎓.

/// note | "📡 ℹ"

👆 💪 ⚙️ `from starlette.responses import HTMLResponse`.

Sebastián Ramírez <******@****.***> 1721182349 -0500

Aditya Manthramurthy <******@****.***> 1653613089 -0700

Sebastián Ramírez <******@****.***> 1728247014 +0200