- 資料驗證
- 資料序列化
- 資料文件化等

它的運作方式與 Pydantic 模型相同；實際上，底層就是透過 Pydantic 達成的。

/// info

請記得，dataclass 無法做到 Pydantic 模型能做的一切。

所以你可能仍然需要使用 Pydantic 模型。

但如果你手邊剛好有一堆 dataclass，這是個不錯的小技巧，可以用來用 FastAPI 驅動一個 Web API。🤓

///

## 在 `response_model` 中使用 Dataclasses { #dataclasses-in-response-model }

你也可以在 `response_model` 參數中使用 `dataclasses`：

{* ../../docs_src/dataclasses_/tutorial002_py310.py hl[1,6:12,18] *}

# WebSockets { #websockets }

**FastAPI** ile [WebSockets](https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API) kullanabilirsiniz.

## `websockets` Kurulumu { #install-websockets }

Bir [sanal ortam](../virtual-environments.md) oluşturduğunuzdan, onu aktive ettiğinizden ve `websockets`'i ("WebSocket" protokolünü kullanmayı kolaylaştıran bir Python kütüphanesi) kurduğunuzdan emin olun:

<div class="termy">

```console
$ pip install websockets

import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;
import org.junit.jupiter.api.Test;
import org.lastaflute.web.response.StreamResponse;
import org.lastaflute.web.servlet.request.stream.WrittenStreamOut;

public class OsddHelperTest extends UnitFessTestCase {

    @Test
    public void test_init_nofile() {

          "foo.ca",
          "foo.eDu.au",
          "foo.uk.com",
          "home.netscape.com",
          "pvt.k12.ca.us",
          "state.CA.us",
          "utenti.blah.IT",
          "web.MIT.edu",
          "www.google.com",
          "www.state.pa.us",
          "www4.yahoo.co.uk"
          // keep-sorted end
          );

  private static final ImmutableSet<String> NON_RS =

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.admin.log;

import org.codelibs.fess.unit.UnitFessTestCase;
import org.junit.jupiter.api.Test;

/**
 * Test class for AdminLogAction.
 * Tests the isLogFilename and sanitizeFilename methods.
 */

import org.codelibs.fess.mylasta.action.FessMessages;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.junit.jupiter.api.Test;
import org.lastaflute.core.message.UserMessages;
import org.lastaflute.web.validation.VaMessenger;

public class SsoMessageExceptionTest extends UnitFessTestCase {

    @Test
    public void test_constructor_withMessageCodeMessageAndCause() {
        // Setup

### Nebenläufigkeit + Parallelität: Web + maschinelles Lernen { #concurrency-parallelism-web-machine-learning }

Mit **FastAPI** können Sie die Vorteile der Nebenläufigkeit nutzen, die in der Webentwicklung weit verbreitet ist (derselbe Hauptvorteil von NodeJS).

C'est similaire à [Diffuser des JSON Lines](stream-json-lines.md), mais cela utilise le format `text/event-stream`, pris en charge nativement par les navigateurs via l’API [`EventSource`](https://developer.mozilla.org/en-US/docs/Web/API/EventSource).

/// info | Info

Ajouté dans FastAPI 0.135.0.

///

## Que sont les Server-Sent Events ? { #what-are-server-sent-events }

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.go;

import org.codelibs.fess.helper.ProtocolHelper;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;

# Веб-сокеты { #websockets }

Вы можете использовать [веб-сокеты](https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API) в **FastAPI**.

## Установка `websockets` { #install-websockets }

Убедитесь, что вы создали [виртуальное окружение](../virtual-environments.md), активировали его и установили `websockets` (библиотека Python, упрощающая работу с протоколом "WebSocket"):

<div class="termy">

```console
$ pip install websockets