# Cookie-Parameter { #cookie-parameters }

Sie können Cookie-Parameter auf die gleiche Weise definieren wie `Query`- und `Path`-Parameter.

## `Cookie` importieren { #import-cookie }

Importieren Sie zuerst `Cookie`:

{* ../../docs_src/cookie_params/tutorial001_an_py310.py hl[3] *}

## `Cookie`-Parameter deklarieren { #declare-cookie-parameters }

Deklarieren Sie dann die Cookie-Parameter mit derselben Struktur wie bei `Path` und `Query`.

# Parámetros de Cookie { #cookie-parameters }

Puedes definir parámetros de Cookie de la misma manera que defines los parámetros `Query` y `Path`.

## Importar `Cookie` { #import-cookie }

Primero importa `Cookie`:

{* ../../docs_src/cookie_params/tutorial001_an_py310.py hl[3] *}

## Declarar parámetros de `Cookie` { #declare-cookie-parameters }

Luego declara los parámetros de cookie usando la misma estructura que con `Path` y `Query`.

                "type": "missing",
                "loc": ["cookie", "p"],
                "msg": "Field required",
                "input": IsOneOf(None, {}),
            }
        ]
    }


@pytest.mark.parametrize(
    "path",
    ["/required-str", "/model-required-str"],
)
def test_required_str(path: str):
    client = TestClient(app)
    client.cookies.set("p", "hello")
    response = client.get(path)

    client = TestClient(app)
    client.cookies.set("p", "hello")
    response = client.get(path)
    assert response.status_code == 200
    assert response.json() == {"p": "hello"}


# =====================================================================================
# Alias


@app.get("/optional-alias")
async def read_optional_alias(
    p: Annotated[str | None, Cookie(alias="p_alias")] = None,
):
    return {"p": p}

**FastAPI** utilisera cette réponse temporaire pour extraire les en-têtes (ainsi que les cookies et le code de statut), et les placera dans la réponse finale qui contient la valeur que vous avez renvoyée, filtrée par tout `response_model`.

Vous pouvez également déclarer le paramètre `Response` dans des dépendances, et y définir des en-têtes (et des cookies).

## Renvoyer une `Response` directement { #return-a-response-directly }

**FastAPI** usará essa resposta *temporária* para extrair os cabeçalhos (cookies e código de status também) e os colocará na resposta final que contém o valor que você retornou, filtrado por qualquer `response_model`.

Você também pode declarar o parâmetro `Response` em dependências e definir cabeçalhos (e cookies) nelas.

## Retorne uma `Response` diretamente { #return-a-response-directly }

    client = TestClient(app)
    client.cookies = [
        ("param", "123"),
        ("param2", "456"),  # Pass a list of values as extra parameter
        ("param2", "789"),
    ]
    resp = client.get("/cookie")
    assert resp.status_code == 200
    resp_json = resp.json()
    assert "param2" in resp_json

    assert response.status_code == 200, response.text
    assert response.json() == {"param": "value"}


def test_cookie_model_with_alias():
    client = TestClient(app)
    client.cookies.set("param_alias", "value")
    response = client.get("/cookie")
    assert response.status_code == 200, response.text
    assert response.json() == {"param": "value"}


def test_query_model_with_alias_by_name():
    client = TestClient(app)

你可以在你的*路径操作函数*中声明一个 `Response` 类型的参数（就像你可以为 cookies 做的那样）。

然后你可以在这个*临时*响应对象中设置头部。

{* ../../docs_src/response_headers/tutorial002_py310.py hl[1, 7:8] *}

然后你可以像平常一样返回任何你需要的对象（例如一个 `dict` 或者一个数据库模型）。

如果你声明了一个 `response_model`，它仍然会被用来过滤和转换你返回的对象。

**FastAPI** 将使用这个*临时*响应来提取头部（也包括 cookies 和状态码），并将它们放入包含你返回的值的最终响应中，该响应由任何 `response_model` 过滤。

你也可以在依赖项中声明 `Response` 参数，并在其中设置头部（和 cookies）。

    handling in WebSockets is significantly improved.
 *  Fix: Don't use SPDY/3 style header concatenation for HTTP/2 request headers.
    This could have corrupted requests where multiple headers had the same name,
    as in cookies.
 *  Fix: Reject bad characters in the URL hostname. Previously characters like
    `\0` would cause a late crash when building the request.
 *  Fix: Allow interceptors to change the request method.