import pytest
from fastapi.testclient import TestClient

from ...utils import needs_py39


@pytest.fixture(name="client")
def get_client():
    from docs_src.security.tutorial001_an_py39 import app

    client = TestClient(app)
    return client


@needs_py39
def test_no_token(client: TestClient):
    response = client.get("/items")
    assert response.status_code == 401, response.text

```JSON
{"item_id":3}
```

/// check | "Заметка"

Обратите внимание на значение `3`, которое получила (и вернула) функция. Это целочисленный Python `int`, а не строка `"3"`.

Используя определения типов, **FastAPI** выполняет автоматический <abbr title="преобразование строк из HTTP-запроса в типы данных Python">"парсинг"</abbr> запросов.

///

## <abbr title="Или валидация">Проверка</abbr> данных

Einige von diesen ✨ [**sponsern FastAPI**](../help-fastapi.md#den-autor-sponsern){.internal-link target=_blank} ✨, das gewährleistet die kontinuierliche und gesunde **Entwicklung** von FastAPI und seinem **Ökosystem**.

You can use:

* `HTTPException`
* `WebSocketException`

These exceptions can be imported directly from `fastapi`:

```python
from fastapi import HTTPException, WebSocketException
```

::: fastapi.HTTPException

from typing import Annotated

from fastapi import Depends, FastAPI
from fastapi.security import OAuth2PasswordBearer
from pydantic import BaseModel

app = FastAPI()

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")


class User(BaseModel):
    username: str
    email: str | None = None
    full_name: str | None = None
    disabled: bool | None = None


def fake_decode_token(token):
    return User(

Isso vai lhe permitir **reusar o modelo** em **múltiplos lugares** e também declarar validações e metadadados para todos os parâmetros de uma vez. 😎

/// note | Nota

Isso é possível desde a versão `0.115.0` do FastAPI. 🤓

///

## Parâmetros do Cabeçalho com um Modelo Pydantic

Declare os **parâmetros de cabeçalho** que você precisa em um **modelo do Pydantic**, e então declare o parâmetro como `Header`:

from typing import Union

from fastapi import Depends, FastAPI
from fastapi.security import OAuth2PasswordBearer
from pydantic import BaseModel

app = FastAPI()

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")


class User(BaseModel):
    username: str
    email: Union[str, None] = None
    full_name: Union[str, None] = None
    disabled: Union[bool, None] = None


def fake_decode_token(token):
    return User(

```

</div>

⚫️ **🏆 💡** 👈 👆 ✍ ⚖️ 📁 📟, ✍ ⚫️ &amp; 🏃 ⚫️ 🌐.

⚙️ ⚫️ 👆 👨‍🎨 ⚫️❔ 🤙 🎦 👆 💰 FastAPI, 👀 ❔ 🐥 📟 👆 ✔️ ✍, 🌐 🆎 ✅, ✍, ♒️.

---

## ❎ FastAPI

🥇 🔁 ❎ FastAPI.

🔰, 👆 💪 💚 ❎ ⚫️ ⏮️ 🌐 📦 🔗 &amp; ⚒:

<div class="termy">

```console
$ pip install "fastapi[all]"

---> 100%
```

</div>

...👈 🔌 `uvicorn`, 👈 👆 💪 ⚙️ 💽 👈 🏃 👆 📟.

/// note

from typing import Union

from fastapi import Depends, FastAPI
from fastapi.security import OAuth2PasswordBearer
from pydantic import BaseModel
from typing_extensions import Annotated

app = FastAPI()

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")


class User(BaseModel):
    username: str
    email: Union[str, None] = None
    full_name: Union[str, None] = None
    disabled: Union[bool, None] = None

import secrets
from typing import Annotated

from fastapi import Depends, FastAPI, HTTPException, status
from fastapi.security import HTTPBasic, HTTPBasicCredentials

app = FastAPI()

security = HTTPBasic()


def get_current_username(
    credentials: Annotated[HTTPBasicCredentials, Depends(security)],
):
    current_username_bytes = credentials.username.encode("utf8")
    correct_username_bytes = b"stanleyjobson"