**FastAPI** **extraerá** los datos para **cada campo** de los **headers** en el request y te dará el modelo Pydantic que definiste.

## Revisa la Documentación { #check-the-docs }

Puedes ver los headers requeridos en la interfaz de documentación en `/docs`:

<div class="screenshot">
<img src="/img/tutorial/header-param-models/image01.png">
</div>

## Prohibir Headers Extra { #forbid-extra-headers }

    val authority = request.headers["Host"] // Has host and port.
    val fancyRequest =
      Request
        .Builder()
        .url("$scheme://$authority/")
        .headers(request.headers)
        .build()
    val fancyResponse =
      Response
        .Builder()
        .code(webSocketResponse.code)
        .message(webSocketResponse.message)
        .headers(webSocketResponse.headers)

    assertThat(recorded.headers["Accept"]).isEqualTo("text/plain")
    assertThat(recorded.headers["Accept-Encoding"]).isNull() // No built-in gzip.
    assertThat(recorded.headers["Connection"]).isEqualTo("Upgrade, HTTP2-Settings")
    if (PlatformVersion.majorVersion < 19) {
      assertThat(recorded.headers["Content-Length"]).isEqualTo("0")
    }
    assertThat(recorded.headers["HTTP2-Settings"]).isNotNull()

@pytest.mark.parametrize(
    "path",
    ["/optional-list-str", "/model-optional-list-str"],
)
def test_optional_list_str(path: str):
    client = TestClient(app)
    response = client.get(path, headers=[("p", "hello"), ("p", "world")])
    assert response.status_code == 200
    assert response.json() == {"p": ["hello", "world"]}


# =====================================================================================

    assert response.headers["WWW-Authenticate"] == "Bearer"


def test_token(client: TestClient):
    response = client.get("/items", headers={"Authorization": "Bearer testtoken"})
    assert response.status_code == 200, response.text
    assert response.json() == {"token": "testtoken"}


def test_incorrect_token(client: TestClient):
    response = client.get("/items", headers={"Authorization": "Notexistent testtoken"})

    val body = "hello".toRequestBody()
    val headers = headersOf("User-Agent", "RequestTest")
    val method = "PUT"
    val request =
      Request(
        url = url,
        headers = headers,
        method = method,
        body = body,
      )
    assertThat(request.url).isEqualTo(url)
    assertThat(request.headers).isEqualTo(headers)
    assertThat(request.method).isEqualTo(method)

///

### `Response`

기본 `Response` 클래스는 다른 모든 응답 클래스의 부모 클래스 입니다.

이 클래스를 직접 반환할 수 있습니다.

다음 매개변수를 받을 수 있습니다:

* `content` - `str` 또는 `bytes`.
* `status_code` - HTTP 상태코드를 나타내는  `int`.
* `headers` - 문자열로 이루어진 `dict`.
* `media_type` - 미디어 타입을 나타내는 `str` 예: `"text/html"`.

FastAPI (실제로는 Starlette)가 자동으로 `Content-Length` 헤더를 포함시킵니다. 또한 `media_type`에 기반하여 `Content-Type` 헤더를 포함하며, 텍스트 타입의 경우 문자 집합을 추가 합니다.

    filename: Annotated[Optional[str], Doc("The original file name.")]
    size: Annotated[Optional[int], Doc("The size of the file in bytes.")]
    headers: Annotated[Headers, Doc("The headers of the request.")]
    content_type: Annotated[
        Optional[str], Doc("The content type of the request, from the headers.")
    ]

    async def write(
        self,
        data: Annotated[
            bytes,
            Doc(
                """

mvn test -Dtest=CurlResponseTest
mvn test -Dtest=CurlExceptionTest
```

### Code Quality
```bash
# Format code (using external formatter config)
mvn formatter:format

# Check license headers
mvn license:check

# Add/update license headers
mvn license:format

# Generate Javadoc
mvn javadoc:javadoc

# Generate test coverage report
mvn jacoco:report
```

### Release Process
```bash

Mas, por segurança, como o servidor não sabe que está atrás de um proxy confiável, ele não interpretará esses headers.

/// note | Detalhes Técnicos

Os headers do proxy são: