# WebSockets { #websockets }

Você pode usar <a href="https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API" class="external-link" target="_blank">WebSockets</a> com **FastAPI**.

## Instale `websockets` { #install-websockets }

Garanta que você criou um [ambiente virtual](../virtual-environments.md){.internal-link target=_blank}, o ativou e instalou o `websockets` (uma biblioteca Python que facilita o uso do protocolo "WebSocket"):

<div class="termy">

/// info | Інформація

Щоб отримувати завантажені файли, спочатку встановіть <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">python-multipart</a>.

Переконайтеся, що Ви створили [віртуальне середовище](../virtual-environments.md){.internal-link target=_blank}, активували його та встановили пакет, наприклад:

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

 * <tr><td><code>session</code></td>           <td></td>               <td>the actual {@link MavenSession}</td></tr>
 * <tr><td><code>session.*</code></td>         <td>(since Maven 3)</td><td></td></tr>
 * <tr><td><code>localRepository</code></td>   <td></td>

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* Une autre documentation d'API est fournie par <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank"><strong>ReDoc</strong></a>.

### Code Examples

Here is some inline `code` and a code block:

```java
public class Example {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}
```

## Links

Check out [Fess Crawler](https://github.com/codelibs/fess-crawler) for more information.

## Conclusion

Ouvrez votre navigateur à l'adresse <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>.

Vous obtiendrez cette réponse JSON :

```JSON
{"message": "Hello World"}
```

### Documentation interactive de l'API

Rendez-vous sur <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

* <a href="https://www.stainless.com/?utm_source=fastapi&utm_medium=referral" class="external-link" target="_blank">Stainless</a>
* <a href="https://developers.liblab.com/tutorials/sdk-for-fastapi?utm_source=fastapi" class="external-link" target="_blank">liblab</a>

///

## Verwenden von `Annotated` im Typ für den `q`-Parameter { #use-annotated-in-the-type-for-the-q-parameter }

만약 JWT 토큰을 다뤄보고, 작동 방식도 알아보고 싶다면 <a href="https://jwt.io/" class="external-link" target="_blank">https://jwt.io</a> 을 확인하십시오.

## `PyJWT` 설치

파이썬으로 JWT 토큰을 생성하고 검증하려면 `PyJWT` 를 설치해야 합니다.

[가상환경](../../virtual-environments.md){.internal-link target=_blank} 을 만들고 활성화한 다음 `pyjwt` 를 설치하십시오:

<div class="termy">

```console
$ pip install pyjwt

---> 100%
```

Você pode fazer isso usando o <a href="https://docs.pydantic.dev/latest/concepts/validators/#field-after-validator" class="external-link" target="_blank">`AfterValidator` do Pydantic</a> dentro de `Annotated`.

/// tip | Dica

O Pydantic também tem <a href="https://docs.pydantic.dev/latest/concepts/validators/#field-before-validator" class="external-link" target="_blank">`BeforeValidator`</a> e outros. 🤓

///