Und um über WebSockets mit Ihrem Backend zu kommunizieren, würden Sie wahrscheinlich die Werkzeuge Ihres Frontends verwenden.

Oder Sie verfügen möglicherweise über eine native Mobile-Anwendung, die direkt in nativem Code mit Ihrem WebSocket-Backend kommuniziert.

Oder Sie haben andere Möglichkeiten, mit dem WebSocket-Endpunkt zu kommunizieren.

---

And to communicate using WebSockets with your backend you would probably use your frontend's utilities.

Or you might have a native mobile application that communicates with your WebSocket backend directly, in native code.

Or you might have any other way to communicate with the WebSocket endpoint.

---

➡️ 📄 🔄 👉 🔗 🌲 & ↔.

`get_current_active_user` 🔗 ✔️ 🎧-🔗 🔛 `get_current_user`, ↔ `"me"` 📣 `get_current_active_user` 🔜 🔌 📇 ✔ ↔ `security_scopes.scopes` 🚶‍♀️ `get_current_user`.

*➡ 🛠️* ⚫️ 📣 ↔, `"items"`, 👉 🔜 📇 `security_scopes.scopes` 🚶‍♀️ `get_current_user`.

📥 ❔ 🔗 🔗 & ↔ 👀 💖:

*  *➡ 🛠️* `read_own_items` ✔️:
    * ✔ ↔ `["items"]` ⏮️ 🔗:
    * `get_current_active_user`:

    这几乎是唯一需要开发者牢记在心，并按规范要求正确执行的事。

    **FastAPI** 则负责处理其它的工作。

## 更新依赖项

接下来，更新依赖项。

使之仅在当前用户为激活状态时，才能获取 `current_user`。

为此，要再创建一个依赖项 `get_current_active_user`，此依赖项以 `get_current_user` 依赖项为基础。

如果用户不存在，或状态为未激活，这两个依赖项都会返回 HTTP 错误。

因此，在端点中，只有当用户存在、通过身份验证、且状态为激活时，才能获得该用户：

```Python hl_lines="58-67  69-72  90"
{!../../../docs_src/security/tutorial003.py!}
```

graph TB

current_user(["current_user"])
active_user(["active_user"])
admin_user(["admin_user"])
paying_user(["paying_user"])

public["/items/public/"]
private["/items/private/"]
activate_user["/users/{user_id}/activate"]
pro_items["/items/pro/"]

current_user --> active_user
active_user --> admin_user
active_user --> paying_user

current_user --> public
active_user --> private
admin_user --> activate_user

graph TB

current_user(["current_user"])
active_user(["active_user"])
admin_user(["admin_user"])
paying_user(["paying_user"])

public["/items/public/"]
private["/items/private/"]
activate_user["/users/{user_id}/activate"]
pro_items["/items/pro/"]

current_user --> active_user
active_user --> admin_user
active_user --> paying_user

current_user --> public
active_user --> private
admin_user --> activate_user

graph TB

current_user(["current_user"])
active_user(["active_user"])
admin_user(["admin_user"])
paying_user(["paying_user"])

public["/items/public/"]
private["/items/private/"]
activate_user["/users/{user_id}/activate"]
pro_items["/items/pro/"]

current_user --> active_user
active_user --> admin_user
active_user --> paying_user

current_user --> public
active_user --> private
admin_user --> activate_user

    ⚫️ 🌖 🕴 👜 👈 👆 ✔️ 💭 ☑ 👆, 🛠️ ⏮️ 🔧.

    🎂, **FastAPI** 🍵 ⚫️ 👆.

## ℹ 🔗

🔜 👥 🔜 ℹ 👆 🔗.

👥 💚 🤚 `current_user` *🕴* 🚥 👉 👩‍💻 🦁.

, 👥 ✍ 🌖 🔗 `get_current_active_user` 👈 🔄 ⚙️ `get_current_user` 🔗.

👯‍♂️ 👉 🔗 🔜 📨 🇺🇸🔍 ❌ 🚥 👩‍💻 🚫 🔀, ⚖️ 🚥 🔕.

, 👆 🔗, 👥 🔜 🕴 🤚 👩‍💻 🚥 👩‍💻 🔀, ☑ 🔓, & 🦁:

=== "🐍 3️⃣.6️⃣ & 🔛"

graph TB

current_user(["current_user"])
active_user(["active_user"])
admin_user(["admin_user"])
paying_user(["paying_user"])

public["/items/public/"]
private["/items/private/"]
activate_user["/users/{user_id}/activate"]
pro_items["/items/pro/"]

current_user --> active_user
active_user --> admin_user
active_user --> paying_user

current_user --> public
active_user --> private
admin_user --> activate_user

We want to get the `current_user` *only* if this user is active.

So, we create an additional dependency `get_current_active_user` that in turn uses `get_current_user` as a dependency.

Both of these dependencies will just return an HTTP error if the user doesn't exist, or if is inactive.

So, in our endpoint, we will only get a user if the user exists, was correctly authenticated, and is active:

=== "Python 3.10+"