在FastAPI中仍然可以单独使用 `BackgroundTask`，但您必须在代码中创建对象，并返回包含它的Starlette `Response`。

更多细节查看 <a href="https://www.starlette.io/background/" class="external-link" target="_blank">Starlette's official docs for Background Tasks</a>.

## 告诫

如果您需要执行繁重的后台计算，并且不一定需要由同一进程运行（例如，您不需要共享内存、变量等），那么使用其他更大的工具（如 <a href="https://docs.celeryq.dev" class="external-link" target="_blank">Celery</a>）可能更好。

它们往往需要更复杂的配置，即消息/作业队列管理器，如RabbitMQ或Redis，但它们允许您在多个进程中运行后台任务，甚至是在多个服务器中。

        .isEqualTo(new byte[] {(byte) 1, (byte) 0, (byte) 0});
  }

  public void testEnsureCapacity_fail() {
    assertThrows(IllegalArgumentException.class, () -> Bytes.ensureCapacity(ARRAY1, -1, 1));
    assertThrows(IllegalArgumentException.class, () -> Bytes.ensureCapacity(ARRAY1, 1, -1));
  }

  public void testToArray() {
    // need explicit type parameter to avoid javac warning!?

package org.gradle.test;

class A {

import jcifs.SmbConstants;
import jcifs.context.SingletonContext;


/**
 * URL handler for transparent smb:// URL handling
 * 
 */
public class Handler extends URLStreamHandler {

    private static final Logger log = LoggerFactory.getLogger(Handler.class);
    private CIFSContext transportContext;


    /**
     * 
     */
    public Handler () {}


    /**
     * @param tc
     */

import javax.security.auth.kerberos.KerberosKey;

import org.bouncycastle.asn1.*;

import jcifs.pac.ASN1Util;
import jcifs.pac.PACDecodingException;


@SuppressWarnings ( "javadoc" )
public class KerberosToken {

    private KerberosApRequest apRequest;


    public KerberosToken ( byte[] token ) throws PACDecodingException {
        this(token, null);
    }

import org.apache.maven.artifact.Artifact;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertTrue;

@Deprecated
class DefaultArtifactResolverTest extends AbstractArtifactComponentTestCase {
    @Inject
    private ArtifactResolver artifactResolver;

    private Artifact projectArtifact;

    @BeforeEach
    @Override

///

## Benutzerdefinierte Header

Beachten Sie, dass benutzerdefinierte proprietäre Header <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">mittels des Präfix 'X-'</a> hinzugefügt werden können.

## Details zum `Request`-Objekt

Da **FastAPI** unter der Haube eigentlich **Starlette** ist, mit einer Ebene von mehreren Tools darüber, können Sie Starlette's <a href="https://www.starlette.io/requests/" class="external-link" target="_blank">`Request`</a>-Objekt direkt verwenden, wenn Sie es benötigen.

public class DefaultLocalMavenInvokerTest
        extends MavenInvokerTestSupport<MavenOptions, MavenInvokerRequest<MavenOptions>> {
    @Override
    protected Invoker<MavenInvokerRequest<MavenOptions>> createInvoker() {
        return new DefaultLocalMavenInvoker(ProtoLookup.builder()
                .addMapping(ClassWorld.class, new ClassWorld("plexus.core", ClassLoader.getSystemClassLoader()))

///

## Custom Headers

Keep in mind that custom proprietary headers can be added <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">using the 'X-' prefix</a>.