# 헤더 매개변수 { #header-parameters }

헤더 매개변수를 `Query`, `Path` 그리고 `Cookie` 매개변수들과 같은 방식으로 정의할 수 있습니다.

## `Header` 임포트 { #import-header }

먼저 `Header`를 임포트합니다:

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

## `Header` 매개변수 선언 { #declare-header-parameters }

`Path`, `Query` 그리고 `Cookie`를 사용한 동일한 구조를 이용하여 헤더 매개변수를 선언합니다.

첫 번째 값은 기본값이며, 추가 검증이나 어노테이션 매개변수 모두 전달할 수 있습니다:

# `APIRouter` class

Here's the reference information for the `APIRouter` class, with all its parameters, attributes and methods.

You can import the `APIRouter` class directly from `fastapi`:

```python
from fastapi import APIRouter
```

::: fastapi.APIRouter
    options:
        members:
            - websocket
            - include_router
            - get
            - put
            - post
            - delete

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.smb2.rdma;

/**
 * RDMA negotiation response parameters.
 *
 * Contains the negotiated parameters returned by the RDMA peer
 * during connection establishment.
 */
public class RdmaNegotiateResponse {

    private int status;
    private int selectedVersion;

# Cookie 参数 { #cookie-parameters }

定义 `Cookie` 参数与定义 `Query` 和 `Path` 参数一样。

## 导入 `Cookie` { #import-cookie }

首先，导入 `Cookie`：

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

## 声明 `Cookie` 参数 { #declare-cookie-parameters }

声明 `Cookie` 参数的方式与声明 `Query` 和 `Path` 参数相同。

第一个值是默认值，还可以传递所有验证参数或注释参数：

{* ../../docs_src/cookie_params/tutorial001_an_py310.py hl[9] *}

/// note | 技术细节

 *
 * @author Louis Wasserman
 */
@GwtCompatible
@NullMarked
public class MultimapBuilderTest extends TestCase {

  @J2ktIncompatible
  @GwtIncompatible // doesn't build without explicit type parameters on build() methods
  public void testGenerics() {
    ListMultimap<String, Integer> unusedA = MultimapBuilder.hashKeys().arrayListValues().build();
    SortedSetMultimap<String, Integer> unusedB =

import java.util.Map;

/**
 * A cache of introspection information for a specific class instance.
 * Keys {@link Method} objects by a concatenation of the
 * method name and the names of classes that make up the parameters.
 *
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
class ClassMap {
    private static final class CacheMiss {}

# 경로 매개변수 { #path-parameters }

파이썬의 포맷 문자열 리터럴에서 사용되는 문법을 이용하여 경로 "매개변수" 또는 "변수"를 선언할 수 있습니다:

{* ../../docs_src/path_params/tutorial001_py310.py hl[6:7] *}

경로 매개변수 `item_id`의 값은 함수의 `item_id` 인자로 전달됩니다.

그래서 이 예제를 실행하고 [http://127.0.0.1:8000/items/foo](http://127.0.0.1:8000/items/foo)로 이동하면, 다음 응답을 볼 수 있습니다:

```JSON
{"item_id":"foo"}
```

## 타입이 있는 경로 매개변수 { #path-parameters-with-types }

import org.apache.maven.plugin.MojoExecution;
import org.apache.maven.project.MavenProject;

/**
 * <p>
 * Encapsulates parameters of MojoExecutionListener callback methods and is meant to provide API evolution path should
 * it become necessary to introduce new parameters in the existing callbacks in the future.
 * </p>
 * <strong>Note:</strong> This class is part of work in progress and can be changed or removed without notice.

import java.util.List;

import org.apache.maven.plugin.MojoExecution;
import org.apache.maven.project.MavenProject;

/**
 * <p>
 * Encapsulates parameters of ProjectExecutionListener callback methods and is meant to provide API evolution path
 * should it become necessary to introduce new parameters in the existing callbacks in the future.
 * </p>
 * <strong>Note:</strong> This class is part of work in progress and can be changed or removed without notice.

    ImmutableList<Parameter> parameters = delegate.getParameters();
    assertEquals(2, parameters.size());
    assertEquals(String.class, parameters.get(0).getType().getType());
    assertTrue(parameters.get(0).isAnnotationPresent(NotBlank.class));
    assertEquals(int.class, parameters.get(1).getType().getType());
    assertFalse(parameters.get(1).isAnnotationPresent(NotBlank.class));
    new EqualsTester()