responses={403: {"description": "Operation forbidden"}},
)
async def update_item(item_id: str):
    if item_id != "plumbus":
        raise HTTPException(
            status_code=403, detail="You can only update the item: plumbus"
        )

from typing import Annotated

from fastapi import Depends, FastAPI, HTTPException

app = FastAPI()


data = {
    "plumbus": {"description": "Freshly pickled plumbus", "owner": "Morty"},
    "portal-gun": {"description": "Gun to create portals", "owner": "Rick"},
}


class OwnerError(Exception):
    pass


def get_username():
    try:
        yield "Rick"
    except OwnerError as e:

    if item_id == "portal-gun":
        raise InternalError(
            f"The portal gun is too dangerous to be owned by {username}"
        )
    if item_id != "plumbus":
        raise HTTPException(
            status_code=404, detail="Item not found, there's only a plumbus here"
        )

    if item_id == "portal-gun":
        raise InternalError(
            f"The portal gun is too dangerous to be owned by {username}"
        )
    if item_id != "plumbus":
        raise HTTPException(
            status_code=404, detail="Item not found, there's only a plumbus here"
        )

from fastapi import Depends, FastAPI, HTTPException

app = FastAPI()


data = {
    "plumbus": {"description": "Freshly pickled plumbus", "owner": "Morty"},
    "portal-gun": {"description": "Gun to create portals", "owner": "Rick"},
}


class OwnerError(Exception):
    pass


def get_username():
    try:
        yield "Rick"
    except OwnerError as e:
        raise HTTPException(status_code=400, detail=f"Owner error: {e}")

클라이언트가 **추가 헤더**를 보내려고 시도하면, **오류** 응답을 받게 됩니다.

예를 들어, 클라이언트가 `plumbus` 값으로 `tool` 헤더를 보내려고 하면, 클라이언트는 헤더 매개변수 `tool`이 허용되지 않는다는 **오류** 응답을 받게 됩니다:

```json
{
    "detail": [
        {
            "type": "extra_forbidden",
            "loc": ["header", "tool"],
            "msg": "Extra inputs are not permitted",
            "input": "plumbus",
        }
    ]
}
```

如果用戶端嘗試傳送額外的標頭，會收到錯誤回應。

例如，用戶端若傳送名為 `tool`、值為 `plumbus` 的標頭，會收到錯誤回應，指出不允許標頭參數 `tool`：

```json
{
    "detail": [
        {
            "type": "extra_forbidden",
            "loc": ["header", "tool"],
            "msg": "Extra inputs are not permitted",
            "input": "plumbus",
        }
    ]
}
```

## 停用底線轉換 { #disable-convert-underscores }

    response = client.post("/items/", json={"name": "Plumbus"})
    response2 = client_no.post("/items/", json={"name": "Plumbus"})
    assert response.status_code == response2.status_code == 200, response.text
    assert (
        response.json()
        == response2.json()
        == {"name": "Plumbus", "description": None, "sub": None}
    )


def test_create_item_with_sub():

如果客户尝试发送一些**额外的 headers**，他们将收到**错误**响应。

例如，如果客户端尝试发送一个值为 `plumbus` 的 `tool` header，客户端将收到一个**错误**响应，告知他们 header 参数 `tool` 是不允许的：

```json
{
    "detail": [
        {
            "type": "extra_forbidden",
            "loc": ["header", "tool"],
            "msg": "Extra inputs are not permitted",
            "input": "plumbus",
        }
    ]
}
```

## 禁用下划线转换 { #disable-convert-underscores }

    if item_id == "portal-gun":
        raise InternalError(
            f"The portal gun is too dangerous to be owned by {username}"
        )
    if item_id != "plumbus":
        raise HTTPException(
            status_code=404, detail="Item not found, there's only a plumbus here"
        )