По умолчанию **FastAPI** автоматически преобразует возвращаемое значение в JSON с помощью `jsonable_encoder`, как описано в [JSON кодировщик](../tutorial/encoder.md){.internal-link target=_blank}.

Затем "под капотом" эти данные, совместимые с JSON (например `dict`), помещаются в `JSONResponse`, который используется для отправки ответа клиенту.

```

</div>

查看文档 <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs。</a>

下图显示的是主应用 API 文档，只包括其自有的*路径操作*。

<img src="/img/tutorial/sub-applications/image01.png">

然后查看子应用文档 <a href="http://127.0.0.1:8000/subapi/docs" class="external-link" target="_blank">http://127.0.0.1:8000/subapi/docs。</a>

下图显示的是子应用的 API 文档，也是只包括其自有的*路径操作*，所有这些路径操作都在 `/subapi` 子路径前缀下。

    /**
     * @see org.junit.rules.ExpectedException
     */
    @Rule
    public ExpectedException exception = ExpectedException.none();

    /**
     * Test method for
     * {@link org.codelibs.core.convert.BinaryConversionUtil#toBinary(java.lang.Object)}
     * .
     */
    @Test
    public void testToBinary() {
        assertThat(BinaryConversionUtil.toBinary(null), nullValue());

    /**
     * Creates "ready to use" session builder instance. The factory does not set up one thing: the
     * {@link org.eclipse.aether.repository.WorkspaceReader}s, that is caller duty to figure out. Workspace readers
     * should be set up as very last thing before using resolver session, that is built by invoking
     * {@link SessionBuilder#build()} method.
     *
     * @param request The maven execution request, must not be {@code null}.

package com.google.common.graph;

import com.google.common.annotations.Beta;
import org.jspecify.annotations.Nullable;

/**
 * This class provides a skeletal implementation of {@link Graph}. It is recommended to extend this
 * class rather than implement {@link Graph} directly.
 *
 * @author James Sexton
 * @param <N> Node parameter type
 * @since 20.0
 */
@Beta

 */
public abstract class Javadocs {
    /**
     * Link to Java API to use when generating Javadoc
     */
    public abstract Property<URI> getJavaApi();

    /**
     * Package list of the Java API used to generate Javadoc offline
     */
    public abstract DirectoryProperty getJavaPackageListLoc();

    /**
     * Link to Groovy API to use when generating Javadoc
     */

ASGI 기술 사양에 따르면, 이는 <a href="https://asgi.readthedocs.io/en/latest/specs/lifespan.html" class="external-link" target="_blank">Lifespan Protocol</a>의 일부이며, `startup`과 `shutdown`이라는 이벤트를 정의합니다.

/// info | 정보

Starlette의 `lifespan` 핸들러에 대해 더 읽고 싶다면 <a href="https://www.starlette.dev/lifespan/" class="external-link" target="_blank">Starlette의 Lifespan 문서</a>에서 확인할 수 있습니다.

이 문서에는 코드의 다른 영역에서 사용할 수 있는 lifespan 상태를 처리하는 방법도 포함되어 있습니다.

* <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/X-Forwarded-Proto" class="external-link" target="_blank">X-Forwarded-Proto</a>
* <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/X-Forwarded-Host" class="external-link" target="_blank">X-Forwarded-Host</a>

///

사용하고자 하는 `Response` 클래스(하위 클래스)를 임포트한 후, **경로 작업 데코레이터*에서 선언하세요.

대규모 응답의 경우, 딕셔너리를 반환하는 것보다 `Response`를 반환하는 것이 훨씬 빠릅니다.

# Handbuch für fortgeschrittene Benutzer { #advanced-user-guide }

## Zusatzfunktionen { #additional-features }

Das Haupt-[Tutorial – Benutzerhandbuch](../tutorial/index.md){.internal-link target=_blank} sollte ausreichen, um Ihnen einen Überblick über alle Hauptfunktionen von **FastAPI** zu geben.

In den nächsten Abschnitten sehen Sie weitere Optionen, Konfigurationen und zusätzliche Funktionen.

/// tip | Tipp