Um beispielsweise einen `X-Token`-Header zu deklarieren, der mehrmals vorkommen kann, können Sie schreiben:

{* ../../docs_src/header_params/tutorial003_an_py310.py hl[9] *}

Wenn Sie mit dieser *Pfadoperation* kommunizieren und zwei HTTP-Header senden, wie:

```
X-Token: foo
X-Token: bar
```

有时，可能需要接收重复的请求头。即同一个请求头有多个值。

类型声明中可以使用 `list` 定义多个请求头。

使用 Python `list` 可以接收重复请求头所有的值。

例如，声明 `X-Token` 多次出现的请求头，可以写成这样：

{* ../../docs_src/header_params/tutorial003_an_py310.py hl[9] *}

与*路径操作*通信时，以下面的方式发送两个 HTTP 请求头：

```
X-Token: foo
X-Token: bar
```

响应结果是：

```JSON
{
    "X-Token values": [
        "bar",
        "foo"
    ]
}
```

## 小结 { #recap }

{* ../../docs_src/security/tutorial001_an_py310.py hl[8] *}

/// tip | İpucu

Burada `tokenUrl="token"`, henüz oluşturmadığımız göreli bir URL olan `token`’ı ifade eder. Göreli URL olduğu için `./token` ile eşdeğerdir.

app = FastAPI()

oauth2_scheme = OAuth2AuthorizationCodeBearer(
    authorizationUrl="authorize",
    tokenUrl="token",
    description="OAuth2 Code Bearer",
    auto_error=True,
)


@app.get("/items/")
async def read_items(token: str | None = Security(oauth2_scheme)):
    return {"token": token}


client = TestClient(app)


def test_no_token():
    response = client.get("/items")

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(
        username=token + "fakedecoded", email="******@****.***", full_name="John Doe"
    )


async def get_current_user(token: str = Depends(oauth2_scheme)):

        this.permissions = value;
    }

    public String getToken() {
        checkSpecifiedProperty("token");
        return convertEmptyToNull(token);
    }

    public void setToken(String value) {
        registerModifiedProperty("token");
        this.token = value;
    }

    public String getUpdatedBy() {
        checkSpecifiedProperty("updatedBy");

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(
        username=token + "fakedecoded", email="******@****.***", full_name="John Doe"
    )


async def get_current_user(token: Annotated[str, Depends(oauth2_scheme)]):

Par exemple, pour déclarer un en-tête `X-Token` qui peut apparaître plusieurs fois, vous pouvez écrire :

{* ../../docs_src/header_params/tutorial003_an_py310.py hl[9] *}

Si vous communiquez avec ce *chemin d'accès* en envoyant deux en-têtes HTTP comme :

```
X-Token: foo
X-Token: bar
```

La réponse ressemblerait à ceci :

```JSON
{
    "X-Token values": [
        "bar",
        "foo"
    ]
}

        // Test constructor with whitespace in type
        String type = "  Bearer Token  ";
        String message = "Whitespace in token type";
        InvalidAccessTokenException exception = new InvalidAccessTokenException(type, message);

        assertEquals("  Bearer Token  ", exception.getType());
        assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());

            <property name="option" value="statement"/>
            <property name="tokens" value="LITERAL_DO,LITERAL_ELSE,LITERAL_FINALLY,LITERAL_IF,LITERAL_FOR,LITERAL_TRY,LITERAL_WHILE,INSTANCE_INIT,STATIC_INIT"/>
        </module>
        <module name="EmptyBlock">
            <property name="option" value="text"/>
            <property name="tokens" value="LITERAL_CATCH"/>
        </module>
        <module name="AvoidNestedBlocks">