{* ../../docs_src/header_param_models/tutorial001_an_py310.py hl[9:14,18] *}

**FastAPI** **extraerá** los datos para **cada campo** de los **headers** en el request y te dará el modelo Pydantic que definiste.

## Revisa la Documentación

Puedes ver los headers requeridos en la interfaz de documentación en `/docs`:

<div class="screenshot">

        final String redirectUrl = userBean.map(user -> ComponentUtil.getSsoManager().logout(user)).orElse(null);
        fessLoginAssist.logout();
        userInfoHelper.deleteUserCodeFromCookie(request);
        if (StringUtil.isNotBlank(redirectUrl)) {
            return HtmlResponse.fromRedirectPathAsIs(redirectUrl);
        }
        return redirect(LoginAction.class);
    }

package mockwebserver3

/**
 * An adverse action to take on a socket, intended to exercise failure modes in the calling code.
 */
public sealed interface SocketEffect {
  /**
   * Close the TCP socket that carries this request.
   *
   * Using this as [MockResponse.onResponseEnd] is the default for HTTP/1.0.
   */
  public class CloseSocket(
    public val closeSocket: Boolean = true,
    public val shutdownInput: Boolean = false,

 */
public class MsrpcQueryInformationPolicy extends lsarpc.LsarQueryInformationPolicy {

    /**
     * Constructs a new MsrpcQueryInformationPolicy request.
     *
     * @param policyHandle the policy handle obtained from LsarOpenPolicy
     * @param level the information level to query
     * @param info the NdrObject to receive the policy information
     */

                labelTypeService.store(entity);
                saveInfo(messages -> messages.addSuccessCrudCreateCrudTable(GLOBAL));
            } catch (final Exception e) {
                logger.warn("Failed to process a request.", e);
                throwValidationError(messages -> messages.addErrorsCrudFailedToCreateCrudTable(GLOBAL, buildThrowableMessage(e)),
                        this::asEditHtml);
            }
        }).orElse(() -> {

            // Verify header encoding including ptype
            verify(mockBuffer, times(3)).enc_ndr_small(0); // minor version, ptype (REQUEST=0), and flags (all are 0)
        }

        @Test
        @DisplayName("encode should handle non-REQUEST ptype correctly")
        void testEncodeNonRequestPtype() throws NdrException {
            message.ptype = DcerpcConstants.RPC_PT_RESPONSE; // 2, not 0

 *     .build();
 * OkHttpClient client = OkHttpClient.Builder()
 *     .certificatePinner(certificatePinner)
 *     .build();
 *
 * Request request = new Request.Builder()
 *     .url("https://" + hostname)
 *     .build();
 * client.newCall(request).execute();
 * ```
 *
 * As expected, this fails with a certificate pinning exception:
 *
 * ```java

   * delimited by 'null'.
   *
   * @param callerIsIdle true if the caller isn't sending any more bytes until the peer responds.
   *     This is true after a `Expect-Continue` request, false for duplex requests, and false for
   *     all other requests.
   */
  @Throws(IOException::class)
  fun takeHeaders(callerIsIdle: Boolean = false): Headers {
    withLock {
      while (headersQueue.isEmpty() && errorCode == null) {

     * @return the URL requiring authentication
     */
    protected final String getRequestingURL() {
        return this.url;
    }

    /**
     * Gets the authentication exception that triggered this request.
     * @return the authentication exception
     */
    protected final SmbAuthException getRequestingException() {
        return this.sae;
    }

    /**

3. El dataclass `Author` incluye una lista de dataclasses `Item`.

4. El dataclass `Author` se usa como el parámetro `response_model`.

5. Puedes usar otras anotaciones de tipos estándar con dataclasses como el request body.

    En este caso, es una lista de dataclasses `Item`.

6. Aquí estamos regresando un diccionario que contiene `items`, que es una lista de dataclasses.