Реализуя обратный вызов, вы можете использовать, например, <a href="https://www.python-httpx.org" class="external-link" target="_blank">HTTPX</a> или <a href="https://requests.readthedocs.io/" class="external-link" target="_blank">Requests</a>.

///

## Напишите код документации обратного вызова { #write-the-callback-documentation-code }

Al desplegar aplicaciones probablemente querrás tener algo de **replicación de procesos** para aprovechar **múltiples núcleos** y poder manejar más requests.

Como viste en el capítulo anterior sobre [Conceptos de Despliegue](concepts.md){.internal-link target=_blank}, hay múltiples estrategias que puedes usar.

### Feature

    /**
     * Sets whether to resolve this request path in DFS.
     *
     * @param resolve true to enable DFS resolution
     */
    void setResolveInDfs(boolean resolve);

    /**
     * Checks if this request should be resolved in DFS.
     *
     * @return whether to resolve the request path in DFS
     */
    boolean isResolveInDfs();

            status_code=HTTP_401_UNAUTHORIZED,
            detail="Not authenticated",
            headers={"WWW-Authenticate": "Bearer"},
        )

    async def __call__(self, request: Request) -> Optional[str]:
        authorization = request.headers.get("Authorization")
        if not authorization:
            if self.auto_error:
                raise self.make_not_authenticated_error()
            else:

            }
            return (T) Boolean.valueOf(value.toString());
        }
        return null;
    }

    /**
     * Encodes a URL by encoding non-URL-safe characters.
     * Uses the request's character encoding if available, otherwise defaults to UTF-8.
     * Only encodes characters that are not considered URL-safe according to CharUtil.
     *
     * @param url the URL to encode

        // Schedule periodic cache cleanup
        scheduler.scheduleAtFixedRate(this::cleanupExpiredEntries, 60, 60, TimeUnit.SECONDS);
    }

    /**
     * Request a directory lease
     *
     * @param directoryPath directory path
     * @param requestedState requested lease state
     * @param scope cache scope
     * @return lease key
     */

)

func updateClaimsExpiry(dsecs string, claims map[string]any) error {
	expStr := claims["exp"]
	if expStr == "" {
		return ErrTokenExpired
	}

	// No custom duration requested, the claims can be used as is.
	if dsecs == "" {
		return nil
	}

	if _, err := auth.ExpToInt64(expStr); err != nil {
		return err
	}

	defaultExpiryDuration, err := GetDefaultExpiration(dsecs)

     */
    private
    fun ConfigurationContainer.forceUpgrade(to: String, version: String) = all {
        resolutionStrategy.dependencySubstitution {
            all {
                if (providedBy.contains(requested.toString())) {
                    useTarget("$to:$version", "Forceful upgrade of capability $name")
                }
            }
        }
    }
}

Ele também cuidará da maioria das coisas de que você precisaria ao implantar uma aplicação, como:

* HTTPS
* Replicação, com dimensionamento automático baseado em requests
* etc.

O FastAPI Cloud é o patrocinador principal e provedor de financiamento dos projetos open source do ecossistema *FastAPI and friends*. ✨

## Implantar em outros provedores de nuvem { #deploy-to-other-cloud-providers }