它被直接导入/包含到FastAPI以便你可以从 `fastapi` 导入，并避免意外从 `starlette.background` 导入备用的 `BackgroundTask` (后面没有 `s`)。

通过仅使用 `BackgroundTasks` (而不是 `BackgroundTask`)，使得能将它作为 *路径操作函数* 的参数 ，并让**FastAPI**为您处理其余部分, 就像直接使用 `Request` 对象。

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`。

    String INDEXER_WEBFS_MAX_DOCUMENT_REQUEST_SIZE = "indexer.webfs.max.document.request.size";

    /** The key of the configuration. e.g. 10000 */
    String INDEXER_DATA_MAX_DOCUMENT_CACHE_SIZE = "indexer.data.max.document.cache.size";

    /** The key of the configuration. e.g. 1048576 */
    String INDEXER_DATA_MAX_DOCUMENT_REQUEST_SIZE = "indexer.data.max.document.request.size";

    /** The key of the configuration. e.g. 100 */

import org.lastaflute.di.core.factory.SingletonLaContainerFactory;
import org.lastaflute.di.core.smart.hot.HotdeployUtil;
import org.lastaflute.job.JobManager;
import org.lastaflute.web.servlet.request.RequestManager;
import org.lastaflute.web.servlet.request.ResponseManager;

public final class ComponentUtil {

    private static final Logger logger = LogManager.getLogger(ComponentUtil.class);

type wholeBitrotReader struct {
	disk       StorageAPI
	volume     string
	filePath   string
	verifier   *BitrotVerifier // Holds the bit-rot info
	tillOffset int64           // Affects the length of data requested in disk.ReadFile depending on Read()'s offset
	buf        []byte          // Holds bit-rot verified data
}

func (b *wholeBitrotReader) ReadAt(buf []byte, offset int64) (n int, err error) {
	if b.buf == nil {

import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;

import org.codelibs.curl.CurlResponse;
import org.dbflute.optional.OptionalEntity;
import org.lastaflute.web.servlet.request.stream.WrittenStreamOut;

public abstract class DictionaryFile<T extends DictionaryItem> {
    protected DictionaryManager dictionaryManager;

    protected String id;

    protected String path;

                                            </tbody>
                                        </table>
                                        <c:set var="pager" value="${dataConfigPager}" scope="request"/>
                                        <c:import url="/WEB-INF/view/common/admin/crud/pagination.jsp"/>
                                        <c:if test="${pager.currentPageNumber > pager.allPageCount}">

                                        </table>
                                    </div>
                                </div>
                                <c:set var="pager" value="${synonymPager}" scope="request"/>
                                <div class="row">
                                    <div class="col-sm-2">
                                        <la:message key="labels.pagination_page_guide_msg"

   *
   * ```
   * direction streamID length type flags
   * ```
   *
   * Where direction is `<<` for inbound and `>>` for outbound.
   *
   * For example, the following would indicate a HEAD request sent from the client.
   * ```
   * `<< 0x0000000f    12 HEADERS       END_HEADERS|END_STREAM
   * ```
   */
  fun frameLog(
    inbound: Boolean,
    streamId: Int,
    length: Int,
    type: Int,

        return false;
    }

    @Override
    public boolean isComplete() {
        return false;
    }

    @Override
    public Header authenticate(final Credentials credentials, final HttpRequest request) throws AuthenticationException {
        return null;
    }

    public void authenticate(final Credentials credentials,
            final BiConsumer<HttpUriRequest, BiConsumer<HttpResponse, HttpEntity>> executor) {

При использовании `BackgroundTasks` (а не `BackgroundTask`), вам достаточно только определить параметр функции с типом `BackgroundTasks` и **FastAPI** сделает все за вас, также как при использовании объекта `Request`.

Вы все равно можете использовать `BackgroundTask` из `starlette` в FastAPI, но вам придется самостоятельно создавать объект фоновой задачи и вручную обработать `Response` внутри него.