{* ../../docs_src/async_tests/test_main.py *}

## Run it

You can run your tests as usual via:

<div class="termy">

```console
$ pytest

---> 100%
```

</div>

## In Detail

The marker `@pytest.mark.anyio` tells pytest that this test function should be called asynchronously:

{* ../../docs_src/async_tests/test_main.py hl[7] *}

{% endfor %}
{% endfor %}
{% endfor %}

## Projects

Latest GitHub projects with the topic `fastapi`:

<div class="github-topic-projects">

## Check the Docs

You can see the defined cookies in the docs UI at `/docs`:

<div class="screenshot">
<img src="/img/tutorial/cookie-param-models/image01.png">
</div>

/// info

Have in mind that, as **browsers handle cookies** in special ways and behind the scenes, they **don't** easily allow **JavaScript** to touch them.

### Checando a documentação

Você pode ver os headers necessários na interface gráfica da documentação em `/docs`:

<div class="screenshot">
<img src="/img/tutorial/header-param-models/image01.png">
</div>

### Proibindo Cabeçalhos adicionais

Em alguns casos de uso especiais (provavelmente não muito comuns), você pode querer **restringir** os cabeçalhos que você quer receber.

```

📥 `app` 🔢 🔜 "👐" 🎓 `FastAPI`.

👉 🔜 👑 ☝ 🔗 ✍ 🌐 👆 🛠️.

👉 `app` 🎏 1️⃣ 🔗 `uvicorn` 📋:

<div class="termy">

```console
$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

🚥 👆 ✍ 👆 📱 💖:

```Python hl_lines="3"
{!../../docs_src/first_steps/tutorial002.py!}
```

RegExp(e,"gi"),"<strong>$&</strong>")))})}i||0===d.length&&k.length>0?k.hide():d.length>0&&0===k.length?(k=a("<div></div>").css(f.css).appendTo("body"),b.addClass("suggestions-"+j),k.attr("data-suggest-container",j).addClass("jquery-form-suggestions").addClass("jquery-form-suggestion-"+j)):d.length>0&&!k.is(":visible")&&k.show(),d.length>0&&e.length!==d[0].length&&(g(k,c),k.html(""),a.each(d,function(b,d){a("<div></div>").append(d).css({overflow:"hidden",textOverflow:"ellipsis",whiteSpace:"nowrap",padding:"5px"}...

    padding:0;
}
.footer ul {
    margin:20px 0 5px 0;
}
.header ul li, .footer ul li {
    list-style:none;
    font-size:1.2em;
}
/*
Heading styles
*/
div.details ul.blockList ul.blockList ul.blockList li.blockList h4, div.details ul.blockList ul.blockList ul.blockListLast li.blockList h4 {
    background-color:#dee3e9;
    border-top:1px solid #9eadc0;
    border-bottom:1px solid #9eadc0;

## Install dependencies

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and install `jinja2`:

<div class="termy">

```console
$ pip install jinja2

---> 100%
```

</div>

## Using `Jinja2Templates`

* Import `Jinja2Templates`.
* Create a `templates` object that you can reuse later.

# 模板

**FastAPI** 支持多种模板引擎。

Flask 等工具使用的 Jinja2 是最用的模板引擎。

在 Starlette 的支持下，**FastAPI** 应用可以直接使用工具轻易地配置 Jinja2。

## 安装依赖项

安装 `jinja2`：

<div class="termy">

```console
$ pip install jinja2

---> 100%
```

</div>

## 使用 `Jinja2Templates`

* 导入 `Jinja2Templates`
* 创建可复用的 `templates` 对象
* 在返回模板的*路径操作*中声明 `Request` 参数

Bu `app` değişkeni, `uvicorn` komutunda atıfta bulunulan değişkenin ta kendisidir.

<div class="termy">

```console
$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

Uygulamanızı aşağıdaki gibi oluşturursanız:

```Python hl_lines="3"