from typing import Annotated

    from fastapi import (
        Cookie,
        FastAPI,
        WebSocket,
        WebSocketException,
        status,
    )

    app = FastAPI()

    @app.websocket("/items/{item_id}/ws")
    async def websocket_endpoint(
        *,
        websocket: WebSocket,
        session: Annotated[str | None, Cookie()] = None,
        item_id: str,
    ):

* <abbr title="также известное как: сериализация, парсинг, маршалинг">Преобразование</abbr> входных данных: из сети в данные и типы Python. Чтение из:
    * JSON.
    * Параметров пути.
    * Параметров запроса.
    * Cookies.
    * HTTP-заголовков.
    * Форм.
    * Файлов.
* <abbr title="также известное как: сериализация, парсинг, маршалинг">Преобразование</abbr> выходных данных: из данных и типов Python в данные сети (например, JSON):

pkg net, type ListenConfig struct, KeepAliveConfig KeepAliveConfig #62254
pkg net/http, func ParseCookie(string) ([]*Cookie, error) #66008
pkg net/http, func ParseSetCookie(string) (*Cookie, error) #66008
pkg net/http, method (*Request) CookiesNamed(string) []*Cookie #61472
pkg net/http, type Cookie struct, Partitioned bool #62490
pkg net/http, type Cookie struct, Quoted bool #46443
pkg net/http, type Request struct, Pattern string #66405

# `Response` class

You can declare a parameter in a *path operation function* or dependency to be of type `Response` and then you can set data for the response like headers or cookies.

You can also use it directly to create an instance of it and return it from your *path operations*.

You can import it directly from `fastapi`:

```python
from fastapi import Response
```

    options:
        members:
            - scope
            - app
            - url
            - base_url
            - headers
            - query_params
            - path_params
            - cookies
            - client
            - state
            - url_for
            - client_state
            - application_state
            - receive
            - send
            - accept

    * <abbr title="en anglais : path parameters">les paramètres du chemin</abbr>.
    * <abbr title="en anglais : query parameters">les paramètres de la requête</abbr>.
    * les cookies.
    * <abbr title="en anglais : headers">les en-têtes</abbr>.
    * <abbr title="en anglais : forms">les formulaires</abbr>.
    * <abbr title="en anglais : files">les fichiers</abbr>.

    - 自動補全
    - 型別檢查
- 資料驗證：
    - 驗證失敗時自動生成清楚的錯誤訊息
    - 可驗證多層巢狀的 JSON 物件
- <abbr title="也被稱為： 序列化或解析">轉換</abbr>輸入的資料： 轉換來自網路請求到 Python 資料型別。包含以下數據：
    - JSON
    - 路徑參數
    - 查詢參數
    - Cookies
    - 請求標頭
    - 表單
    - 文件
- <abbr title="也被稱為： 序列化或解析">轉換</abbr>輸出的資料： 轉換 Python 資料型別到網路傳輸的 JSON：
    - 轉換 Python 型別 (`str`、 `int`、 `float`、 `bool`、 `list` 等)
    - `datetime` 物件
    - `UUID` 物件

      Headers
        .Builder()
        .add("content-length", "99")
        .add("authorization", "peanutbutter")
        .add("proxy-authorization", "chocolate")
        .add("cookie", "drink=coffee")
        .add("set-cookie", "accessory=sugar")
        .add("user-agent", "OkHttp")
        .build()
    val request =
      Request(
        "https://square.com".toHttpUrl(),
        headers,
      )

  /**
   * Configure the ApplicationContext. Not needed unless the AndroidX Startup [Initializer] is disabled, or running
   * a robolectric test.
   *
   * The functionality that will fail without a valid Context is primarily Cookies and URL Domain handling, but
   * may expand in the future.
   */
  fun initialize(applicationContext: Context) {
    if (PlatformRegistry.applicationContext == null) {

    * Sie hängt von `query_extractor` ab und weist den von diesem zurückgegebenen Wert dem Parameter `q` zu.
* Sie deklariert außerdem ein optionales `last_query`-Cookie, ein `str`.
    * Wenn der Benutzer keine Query `q` übermittelt hat, verwenden wir die zuletzt übermittelte Query, die wir zuvor in einem Cookie gespeichert haben.

## Die Abhängigkeit verwenden { #use-the-dependency }

Diese Abhängigkeit verwenden wir nun wie folgt: