* Swagger UI.
    * ReDoc.

---

Pour revenir à l'exemple de code précédent, **FastAPI** permet de :

* Valider que `item_id` existe dans le chemin des requêtes `GET` et `PUT`.
* Valider que `item_id` est de type `int` pour les requêtes `GET` et `PUT`.
    * Si ce n'est pas le cas, le client voit une erreur utile et claire.

# Hibernate Validator
# -------------------
constraints.CreditCardNumber.message = {item} est un numéro de carte de crédit non valide.
constraints.EAN.message = {item} est un code-barres {type} non valide.
constraints.Email.message = {item} n'est pas une adresse e-mail valide.
constraints.Length.message = La longueur de {item} doit être comprise entre {min} et {max}.

# Hibernate Validator
# -------------------
constraints.CreditCardNumber.message = {item} no es un número de tarjeta de crédito válido.
constraints.EAN.message = {item} no es un código de barras {type} válido.
constraints.Email.message = {item} no es una dirección de correo electrónico válida.
constraints.Length.message = La longitud de {item} debe estar entre {min} y {max}.

/// check | Periksa

Dengan deklarasi tipe data Python, **FastAPI** melakukan validasi data.

Perhatikan kesalahan tersebut juga menjelaskan validasi apa yang tidak sesuai.

Validasi ini sangat membantu ketika mengembangkan dan men-*debug* kode yang berhubungan dengan API anda.

///

## Dokumentasi

Al heredar de `str`, la documentación de la API podrá saber que los valores deben ser de tipo `string` y podrá representarlos correctamente.

Luego crea atributos de clase con valores fijos, que serán los valores válidos disponibles:

{* ../../docs_src/path_params/tutorial005.py hl[1,6:9] *}

/// info | Información

        // Then - Buffer should be valid
        assertNotNull(buffer2, "Reused buffer should not be null");
        assertEquals(SmbComTransaction.TRANSACTION_BUF_SIZE, buffer2.length, "Reused buffer should have correct size");

        // Note: We don't check if content is cleared as that's not a security requirement
        // The important part is that the buffer is valid and has correct size
    }

    /**

     * Default constructor.
     */
    public FessApiAdminAction() {
        super();
    }

    /**
     * Determines whether the current request is authorized to access admin API endpoints.
     * This method validates the access token and checks if the associated permissions
     * allow admin access according to the Fess configuration.
     *
     * @return true if admin access is allowed, false otherwise
     */
    @Override

        if (!isCredentialTypeCorrect()) {
            throw new PACDecodingException("Invalid PAC credential type");
        }
    }

    /**
     * Validates whether the credential type data is correct.
     * @return true if the credential type is valid, false otherwise
     */
    public boolean isCredentialTypeCorrect() {
        return this.credentialType != null && this.credentialType.length < MINIMAL_BUFFER_SIZE;
    }

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.util.Hexdump;

/**
 * Privilege Attribute Certificate (PAC) decoder for Kerberos tickets.
 * Parses and validates PAC data structures containing user authorization information
 * from Active Directory Kerberos tickets.
 */
public class Pac {

    private static final Logger log = LoggerFactory.getLogger(Pac.class);

    /**
     * Gets the signing key for SMB2/3
     *
     * @return the signing key or null if not available
     */
    byte[] getSigningKey();

    /**
     * Validates authentication credentials
     *
     * @return true if credentials are valid
     */
    boolean validateCredentials();

    /**
     * Clears sensitive authentication data
     */
    void clearSensitiveData();

    /**