///

## Eine benutzerdefinierte `Response` zurückgeben

Das obige Beispiel zeigt alle Teile, die Sie benötigen, ist aber noch nicht sehr nützlich, da Sie das `item` einfach direkt hätten zurückgeben können, und **FastAPI** würde es für Sie in eine `JSONResponse` einfügen, es in ein `dict` konvertieren, usw. All das standardmäßig.

Sehen wir uns nun an, wie Sie damit eine benutzerdefinierte Response zurückgeben können.

* Ele pega cada **requisição** que chega ao seu aplicativo.
* Ele pode então fazer algo com essa **requisição** ou executar qualquer código necessário.
* Então ele passa a **requisição** para ser processada pelo resto do aplicativo (por alguma *operação de rota*).
* Ele então pega a **resposta** gerada pelo aplicativo (por alguma *operação de rota*).
* Ele pode fazer algo com essa **resposta** ou executar qualquer código necessário.

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In many frameworks and systems just handling security and authentication takes a big amount of effort and code (in many cases it can be 50% or more of all the code written).

**FastAPI** provides several tools to help you deal with **Security** easily, rapidly, in a standard way, without having to study and learn all the security specifications.

But first, let's check some small concepts.

## In a hurry?

    protected static final String SPNEGO_ALLOW_DELEGATION = "spnego.allow.delegation";
    protected static final String SPNEGO_ALLOW_LOCALHOST = "spnego.allow.localhost";
    protected static final String SPNEGO_PROMPT_NTLM = "spnego.prompt.ntlm";
    protected static final String SPNEGO_ALLOW_UNSECURE_BASIC = "spnego.allow.unsecure.basic";
    protected static final String SPNEGO_ALLOW_BASIC = "spnego.allow.basic";

    // We define the arithmetic means X_n = 1/n \sum_{i=1}^n x_i, and Y_n = 1/n \sum_{i=1}^n y_i.
    // We also define the sum of the products of the differences from the means
    //           C_n = \sum_{i=1}^n x_i y_i - n X_n Y_n
    // for all n >= 1. Then for all n > 1:
    //       C_{n-1} = \sum_{i=1}^{n-1} x_i y_i - (n-1) X_{n-1} Y_{n-1}
    // C_n - C_{n-1} = x_n y_n - n X_n Y_n + (n-1) X_{n-1} Y_{n-1}

 * defined as the <i>least</i> element in the queue according to the queue's comparator. But unlike
 * a regular priority queue, the methods {@link #peekLast}, {@link #pollLast} and {@link
 * #removeLast} are also provided, to act on the <i>greatest</i> element in the queue instead.
 *
 * <p>A min-max priority queue can be configured with a maximum size. If so, each time the size of

   * printing space backward on the same printing line. (Applicable also to display devices.)
   *
   * @since 8.0
   */
  public static final byte BS = 8;

  /**
   * Horizontal Tabulation ('\t'): A format effector which controls the movement of the printing
   * position to the next in a series of predetermined positions along the printing line.
   * (Applicable also to display devices and the skip function on punched cards.)
   *

## Die `scopes` verwenden

Der Parameter `security_scopes` wird vom Typ `SecurityScopes` sein.

Dieses verfügt über ein Attribut `scopes` mit einer Liste, die alle von ihm selbst benötigten Scopes enthält und ferner alle Abhängigkeiten, die dieses als Unterabhängigkeit verwenden. Sprich, alle „Dependanten“ ... das mag verwirrend klingen, wird aber später noch einmal erklärt.

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