Puedes añadir código que se ejecute con la `request`, antes de que cualquier *path operation* la reciba.

Y también después de que se genere la `response`, antes de devolverla.

Por ejemplo, podrías añadir un custom header `X-Process-Time` que contenga el tiempo en segundos que tomó procesar la request y generar una response:

{* ../../docs_src/middleware/tutorial001_py310.py hl[10,12:13] *}

/// tip | Consejo

如果您有一组相关的 **cookie**，您可以创建一个 **Pydantic 模型**来声明它们。🍪

这将允许您在**多个地方**能够**重用模型**，并且可以一次性声明所有参数的验证方式和元数据。😎

/// note | 注意

自 FastAPI 版本 `0.115.0` 起支持此功能。🤓

///

/// tip | 提示

此技术同样适用于 `Query` 、 `Cookie` 和 `Header` 。😎

///

## 带有 Pydantic 模型的 Cookie { #cookies-with-a-pydantic-model }

在 **Pydantic** 模型中声明所需的 **cookie** 参数，然后将参数声明为 `Cookie` ：

{* ../../docs_src/cookie_param_models/tutorial001_an_py310.py hl[9:12,16] *}

# ----------------------------------------------------------
# Lasta Taglib
# ------------
errors.front_header=
errors.front_footer=
errors.front_prefix=<div class="alert alert-warning">
errors.front_suffix=</div>
errors.header = <ul class="has-error">
errors.footer = </ul>
errors.prefix = <li><i class="fa fa-exclamation-circle"></i>
errors.suffix = </li>
# ----------------------------------------------------------
# Javax Validator

# ========================================================================================
# Framework Default
# =================
# ----------------------------------------------------------
# Lasta Taglib
# ------------
errors.header = <ul class="has-error">
errors.footer = </ul>
errors.prefix = <li><i class="fa fa-exclamation-circle"></i>
errors.suffix = </li>
# ----------------------------------------------------------
# Javax Validator

## Usando `Depends` y otros { #using-depends-and-others }

En endpoints de WebSocket puedes importar desde `fastapi` y usar:

* `Depends`
* `Security`
* `Cookie`
* `Header`
* `Path`
* `Query`

Funcionan de la misma manera que para otros endpoints de FastAPI/*path operations*:

{* ../../docs_src/websockets_/tutorial002_an_py310.py hl[68:69,82] *}

/// info | Información

	<property name="kopf.version" value="main" />
	<property name="kopf.url" value="https://github.com/codelibs/fess-kopf/archive/refs/heads/${kopf.version}.zip" />

	<!-- Maven Repository -->
	<property name="maven.snapshot.repo.url" value="https://central.sonatype.com/repository/maven-snapshots" />

        roleQueryHelper.setEncryptedParameterValue(false);
        assertFalse(roleQueryHelper.encryptedParameterValue);

        roleQueryHelper.setHeaderKey("header");
        assertEquals("header", roleQueryHelper.headerKey);

        roleQueryHelper.setEncryptedHeaderValue(false);
        assertFalse(roleQueryHelper.encryptedHeaderValue);

        roleQueryHelper.setCookieKey("cookie");

	switch event.Action {
	case DeleteAction, DeleteVersionAction, DeleteAllVersionsAction, DelMarkerDeleteAllVersionsAction:
		w.Header()[xhttp.AmzExpiration] = []string{
			fmt.Sprintf(`expiry-date="%s", rule-id="%s"`, event.Due.Format(http.TimeFormat), event.RuleID),
		}
	case TransitionAction, TransitionVersionAction:
		w.Header()[xhttp.MinIOTransition] = []string{

	// Version numbers.
	zipVersion20 = 20 // 2.0
	zipVersion45 = 45 // 4.5 (reads and writes zip64 archives)

	// Limits for non zip64 files.
	uint16max = (1 << 16) - 1
	uint32max = (1 << 32) - 1

	// Extra header IDs.
	//
	// IDs 0..31 are reserved for official use by PKWARE.
	// IDs above that range are defined by third-party vendors.
	// Since ZIP lacked high precision timestamps (nor an official specification

            // When using RDMA channel, this points to SMB2_RDMA_TRANSFORM in Buffer
            SMBUtil.writeInt2(80, dst, dstIndex); // ReadChannelInfoOffset (after header)
            SMBUtil.writeInt2(16, dst, dstIndex + 2); // ReadChannelInfoLength
            dstIndex += 4;
        } else {
            SMBUtil.writeInt2(0, dst, dstIndex);