## Example

    ```python
    from typing import Annotated

    from fastapi import Depends, FastAPI
    from fastapi.security import OAuth2PasswordRequestForm

    app = FastAPI()


    @app.post("/login")
    def login(form_data: Annotated[OAuth2PasswordRequestForm, Depends()]):
        data = {}
        data["scopes"] = []
        for scope in form_data.scopes:

Mas, se por algum motivo seus clientes dependem do comportamento antigo, você pode voltar a ele sobrescrevendo o método `make_not_authenticated_error` nas suas classes de segurança.

# Security Tools

When you need to declare dependencies with OAuth2 scopes you use `Security()`.

But you still need to define what is the dependable, the callable that you pass as a parameter to `Depends()` or `Security()`.

There are multiple tools that you can use to create those dependables, and they get integrated into OpenAPI so they are shown in the automatic docs UI, they can be used by automatically generated clients and SDKs, etc.

Pero si por alguna razón tus clientes dependen del comportamiento anterior, puedes volver a él sobrescribiendo el método `make_not_authenticated_error` en tus clases de seguridad.

 */
@Deprecated(since = "4.0.0")
public interface ModelBuildingEvent {

    /**
     * Gets the model being built. The precise state of this model depends on the event being fired.
     *
     * @return The model being built, never {@code null}.
     */
    Model getModel();

    /**
     * Gets the model building request being processed.
     *

            pluginValidationManager.reportPluginValidationIssue(
                    PluginValidationManager.IssueLocality.EXTERNAL,
                    session,
                    pluginArtifact,
                    "Plugin depends on plexus-container-default, which is EOL");
        }
    }

  public void testLog2HalfEven() {
    for (BigInteger x : POSITIVE_BIGINTEGER_CANDIDATES) {
      int halfEven = BigIntegerMath.log2(x, HALF_EVEN);
      // Now figure out what rounding mode we should behave like (it depends if FLOOR was
      // odd/even).
      boolean floorWasEven = (BigIntegerMath.log2(x, FLOOR) & 1) == 0;
      assertEquals(BigIntegerMath.log2(x, floorWasEven ? HALF_DOWN : HALF_UP), halfEven);
    }
  }

<img src="/img/tutorial/websockets/image03.png">

您可以发送（和接收）多条消息：

<img src="/img/tutorial/websockets/image04.png">

所有这些消息都将使用同一个 WebSocket 连

接。

## 使用 `Depends` 和其他依赖项

在 WebSocket 端点中，您可以从 `fastapi` 导入并使用以下内容：

* `Depends`
* `Security`
* `Cookie`
* `Header`
* `Path`
* `Query`

它们的工作方式与其他 FastAPI 端点/ *路径操作* 相同：

{* ../../docs_src/websockets/tutorial002_an_py310.py hl[68:69,82] *}

But if for some reason your clients depend on the old behavior, you can revert to it by overriding the method `make_not_authenticated_error` in your security classes.

## 現在のユーザーの注入

ですので、 `get_current_user` に対して同様に *path operation* の中で `Depends` を利用できます。

{* ../../docs_src/security/tutorial002.py hl[31] *}

Pydanticモデルの `User` として、 `current_user` の型を宣言することに注意してください。

その関数の中ですべての入力補完や型チェックを行う際に役に立ちます。

/// tip | 豆知識

リクエストボディはPydanticモデルでも宣言できることを覚えているかもしれません。

ここでは `Depends` を使っているおかげで、 **FastAPI** が混乱することはありません。

///

/// check | 確認