assertEquals(SmbComTransaction.TRANS_WAIT_NAMED_PIPE, pipe.subCommand);

        // Timeout is set to 0xFFFFFFFF (-1 when cast to int)
        assertEquals(0xFFFFFFFF, pipe.timeout);

        // Max parameter and data counts should be 0
        assertEquals(0, pipe.maxParameterCount);
        assertEquals(0, pipe.maxDataCount);

        // Max setup count should be 0
        assertEquals(0, pipe.maxSetupCount);

            factory.setFeature("http://xml.org/sax/features/external-general-entities", false);
            factory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
        } catch (SAXNotRecognizedException | SAXNotSupportedException e) {
            throw new SAXRuntimeException(e);
        } catch (final ParserConfigurationException e) {

# 回應標頭 { #response-headers }

## 使用 `Response` 參數 { #use-a-response-parameter }

你可以在你的*路徑操作函式（path operation function）*中宣告一個 `Response` 型別的參數（就像處理 Cookie 一樣）。

然後你可以在那個*暫時性的* `Response` 物件上設定標頭。

{* ../../docs_src/response_headers/tutorial002_py310.py hl[1, 7:8] *}

接著你可以像平常一樣回傳任何你需要的物件（`dict`、資料庫模型等）。

如果你宣告了 `response_model`，它仍會用來過濾並轉換你回傳的物件。

FastAPI 會使用那個暫時性的回應來擷取標頭（還有 Cookie 與狀態碼），並把它們放到最終回應中；最終回應包含你回傳的值，且會依任何 `response_model` 進行過濾。

## Usando `BackgroundTasks` { #using-backgroundtasks }

Primeiro, importe `BackgroundTasks` e defina um parâmetro na sua *função de operação de rota* com uma declaração de tipo `BackgroundTasks`:

{* ../../docs_src/background_tasks/tutorial001_py310.py hl[1,13] *}

O **FastAPI** criará o objeto do tipo `BackgroundTasks` para você e o passará como esse parâmetro.

## Crie uma função de tarefa { #create-a-task-function }

import static java.lang.annotation.ElementType.CONSTRUCTOR;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;

import java.lang.annotation.Annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

     * @return nt password hash
     */
    public static byte[] getNTHash(final String password) {
        if (password == null) {
            throw new NullPointerException("Password parameter is required");
        }
        final MessageDigest md4 = Crypto.getMD4();
        md4.update(Strings.getUNIBytes(password));
        return md4.digest();
    }

    /**

///

Le paramètre `status_code` reçoit un nombre correspondant au code d'état HTTP.

/// info

`status_code` peut aussi recevoir un `IntEnum`, comme le [`http.HTTPStatus`](https://docs.python.org/3/library/http.html#http.HTTPStatus) de Python.

///

Il va :

* Renvoyer ce code d'état dans la réponse.
* Le documenter comme tel dans le schéma OpenAPI (et donc dans les interfaces utilisateur) :

2. `pydantic.dataclasses`, `dataclasses` için bir drop-in replacement'tır.

3. `Author` dataclass'ı, `Item` dataclass'larından oluşan bir liste içerir.

4. `Author` dataclass'ı, `response_model` parametresi olarak kullanılır.

5. Request body olarak dataclass'larla birlikte diğer standart type annotation'ları da kullanabilirsiniz.

    Bu örnekte, `Item` dataclass'larından oluşan bir listedir.

Elle aura un *chemin d'accès* qui recevra un corps `Invoice`, et un paramètre de requête `callback_url` qui contiendra l’URL pour le callback.

Cette partie est assez normale, la plupart du code vous est probablement déjà familier :

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[7:11,34:51] *}

/// tip | Astuce

   * will be returned as the proxied method's return value.
   *
   * <p>Unlike {@link #invoke}, {@code args} will never be null. When the method has no parameter,
   * an empty array is passed in.
   */
  protected abstract @Nullable Object handleInvocation(
      Object proxy, Method method, @Nullable Object[] args) throws Throwable;

  /**