"title": "towel",
    "size": "XL"
  }
}
```

#### O `HTTPException` do FastAPI vs o `HTTPException` do Starlette.

O **FastAPI** tem o seu próprio `HTTPException`.

E a classe de erro `HTTPException` do **FastAPI** herda da classe de erro do `HTTPException` do Starlette.

A diferença entre os dois é a de que o `HTTPException` do **FastAPI** permite que você adicione *headers* que serão incluídos nas *responses*.

    "size": "XL"
  }
}
```

#### FastAPI `HTTPException` 🆚 💃 `HTTPException`

**FastAPI** ✔️ 🚮 👍 `HTTPException`.

& **FastAPI**'Ⓜ `HTTPException` ❌ 🎓 😖 ⚪️➡️ 💃 `HTTPException` ❌ 🎓.

🕴 🔺, 👈 **FastAPI**'Ⓜ `HTTPException` ✔ 👆 🚮 🎚 🔌 📨.

👉 💪/⚙️ 🔘 ✳ 2️⃣.0️⃣ & 💂‍♂ 🚙.

, 👆 💪 🚧 🙋‍♀ **FastAPI**'Ⓜ `HTTPException` 🛎 👆 📟.

✋️ 🕐❔ 👆 ® ⚠ 🐕‍🦺, 👆 🔜 ® ⚫️ 💃 `HTTPException`.

    "size": "XL"
  }
}
```

#### FastAPI's `HTTPException` vs Starlette's `HTTPException`

**FastAPI** has its own `HTTPException`.

And **FastAPI**'s `HTTPException` error class inherits from Starlette's `HTTPException` error class.

The only difference is that **FastAPI**'s `HTTPException` accepts any JSON-able data for the `detail` field, while Starlette's `HTTPException` only accepts strings for it.

        raise HTTPException(status_code=400, detail="Invalid X-Token header")
    if item_id not in fake_db:
        raise HTTPException(status_code=404, detail="Item not found")
    return fake_db[item_id]


@app.post("/items/", response_model=Item)
async def create_item(item: Item, x_token: str = Header()):
    if x_token != fake_secret_token:
        raise HTTPException(status_code=400, detail="Invalid X-Token header")

@app.get("/items/{item_id}", response_model=Item)
async def read_main(item_id: str, x_token: Annotated[str, Header()]):
    if x_token != fake_secret_token:
        raise HTTPException(status_code=400, detail="Invalid X-Token header")
    if item_id not in fake_db:
        raise HTTPException(status_code=404, detail="Item not found")
    return fake_db[item_id]


@app.post("/items/", response_model=Item)

):
    if current_user.disabled:
        raise HTTPException(status_code=400, detail="Inactive user")
    return current_user


@app.post("/token")
async def login(form_data: Annotated[OAuth2PasswordRequestForm, Depends()]):
    user_dict = fake_users_db.get(form_data.username)
    if not user_dict:
        raise HTTPException(status_code=400, detail="Incorrect username or password")

):
    if current_user.disabled:
        raise HTTPException(status_code=400, detail="Inactive user")
    return current_user


@app.post("/token")
async def login(form_data: Annotated[OAuth2PasswordRequestForm, Depends()]):
    user_dict = fake_users_db.get(form_data.username)
    if not user_dict:
        raise HTTPException(status_code=400, detail="Incorrect username or password")

  }
}
```

#### FastAPIの`HTTPException`とStarletteの`HTTPException`

**FastAPI**は独自の`HTTPException`を持っています。

また、 **FastAPI**のエラークラス`HTTPException`はStarletteのエラークラス`HTTPException`を継承しています。

唯一の違いは、**FastAPI** の`HTTPException`はレスポンスに含まれるヘッダを追加できることです。

これはOAuth 2.0といくつかのセキュリティユーティリティのために内部的に必要とされ、使用されています。

そのため、コード内では通常通り **FastAPI** の`HTTPException`を発生させ続けることができます。

    raw_body = await request.body()
    try:
        data = yaml.safe_load(raw_body)
    except yaml.YAMLError:
        raise HTTPException(status_code=422, detail="Invalid YAML")
    try:
        item = Item.parse_obj(data)
    except ValidationError as e:
        raise HTTPException(status_code=422, detail=e.errors())

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: