router_sig = inspect.signature(router_method)
        app_sig = inspect.signature(app_method)
        param: inspect.Parameter
        for key, param in base_sig.parameters.items():
            router_param: inspect.Parameter = router_sig.parameters[key]
            app_param: inspect.Parameter = app_sig.parameters[key]
            assert param.annotation == router_param.annotation

    openapi = app.openapi()
    body_model_name = get_body_model_name(openapi, path)

    assert app.openapi()["components"]["schemas"][body_model_name] == {
        "properties": {
            "p": {
                "items": {"type": "string"},
                "title": "P",
                "type": "array",
            },
        },
        "required": ["p"],
        "title": body_model_name,
        "type": "object",
    }

Vous obtenez alors cette réponse <abbr title="JavaScript Object Notation">JSON</abbr> :

```JSON
{"item_id": 5, "q": "somequery"}
```

Vous venez de créer une API qui :

* Reçoit les requêtes HTTP pour les _chemins_ `/` et `/items/{item_id}`.

### Revísalo { #check-it }

Abre tu navegador en <a href="http://127.0.0.1:8000/items/5?q=somequery" class="external-link" target="_blank">http://127.0.0.1:8000/items/5?q=somequery</a>.

Verás el response JSON como:

```JSON
{"item_id": 5, "q": "somequery"}
```

Ya creaste una API que:

* Recibe requests HTTP en los _paths_ `/` y `/items/{item_id}`.

</details>

### 檢查

使用瀏覽器開啟 <a href="http://127.0.0.1:8000/items/5?q=somequery" class="external-link" target="_blank">http://127.0.0.1:8000/items/5?q=somequery</a>。

你將會看到以下的 JSON 回應：

```JSON
{"item_id": 5, "q": "somequery"}
```

你已經建立了一個具有以下功能的 API：

- 透過路徑 `/` 和 `/items/{item_id}` 接受 HTTP 請求。
- 以上路經都接受 `GET` 請求（也被稱為 HTTP _方法_）。
- 路徑 `/items/{item_id}` 有一個 `int` 型別的 `item_id` 參數。

### Verifique { #check-it }

Abra seu navegador em <a href="http://127.0.0.1:8000/items/5?q=somequery" class="external-link" target="_blank">http://127.0.0.1:8000/items/5?q=somequery</a>.

Você verá a resposta JSON como:

```JSON
{"item_id": 5, "q": "somequery"}
```

Você acabou de criar uma API que:

* Recebe requisições HTTP nas _rotas_ `/` e `/items/{item_id}`.

    message = "Validation errors:"
    for error in exc.errors():
        message += f"\nField: {error['loc']}, Error: {error['msg']}"
    return PlainTextResponse(message, status_code=400)


@app.get("/items/{item_id}")
async def read_item(item_id: int):
    if item_id == 3:
        raise HTTPException(status_code=418, detail="Nope! I don't like 3.")

app = FastAPI()


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None
    tags: set[str] = set()


@app.post(
    "/items/",
    response_model=Item,
    summary="Create an item",
    response_description="The created item",
)
async def create_item(item: Item):
    """
    Create an item with all the information:

class OwnerError(Exception):
    pass


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


@app.get("/items/{item_id}")
def get_item(item_id: str, username: Annotated[str, Depends(get_username)]):
    if item_id not in data:
        raise HTTPException(status_code=404, detail="Item not found")
    item = data[item_id]

# user properties at the very beginning of Maven's boot process.
#

# Comma-separated list of files to include.
# Each item may be enclosed in quotes to gracefully include spaces. Items are trimmed before being loaded.
# If the first character of an item is a question mark, the load will silently fail if the file does not exist.
${includes} = ?"${maven.user.conf}/maven-user.properties", \