void testWriteAtBufferBoundary() {
            request.setReadLength(1024);

            byte[] buffer = new byte[100];

            // Try to write at position that would exceed buffer
            assertThrows(ArrayIndexOutOfBoundsException.class, () -> request.writeBytesWireFormat(buffer, 52)); // 52 + 49 > 100
        }
    }

---

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.
* Vérifier qu'il existe un paramètre de requête facultatif nommé `q` (comme dans `http://127.0.0.1:8000/items/foo?q=somequery`) pour les requêtes `GET`.

---

"_I’m over the moon excited about **FastAPI**. It’s so fun!_"

---

"_I’m over the moon excited about **FastAPI**. It’s so fun!_"

        @Test
        @DisplayName("Should handle write at buffer boundary")
        void testWriteAtBufferBoundary() {
            byte[] buffer = new byte[100];

            // Try to write at position that would exceed buffer
            assertThrows(ArrayIndexOutOfBoundsException.class, () -> request.writeBytesWireFormat(buffer, 80)); // 80 + 48 > 100
        }

        @Test

Crie um token de acesso JWT real e o retorne.

{* ../../docs_src/security/tutorial004_an_py310.py hl[118:133] *}

### Detalhes técnicos sobre o "sujeito" `sub` do JWT

A especificação JWT diz que existe uma chave `sub`, com o sujeito do token.

É opcional usá-la, mas é onde você colocaria a identificação do usuário, então nós estamos usando aqui.

---

<div style="text-align: left; direction: ltr;">"I’m over the moon excited about <strong>FastAPI</strong>. It’s so fun!"</div>

---

"_I’m over the moon excited about **FastAPI**. It’s so fun!_"

        }

        // Check if key rotation is needed (including the current message)
        if (needsKeyRotation(message.length)) {
            log.warn("Encryption keys need rotation - will exceed usage limits (bytes: {} + {}, time: {} ms)", bytesEncrypted.get(),
                    message.length, System.currentTimeMillis() - encryptionStartTime);

            // Perform automatic key rotation if session key is available

         *
         * We carry out this computation in modular arithmetic. Since times2ToThe32Mod accepts any
         * unsigned long, we don't have to do a mod on every operation, only when intermediate
         * results can exceed 2^63.
         */
        long result = times2ToThe32Mod(aHi * bHi /* < 2^62 */, m); // < m < 2^63
        result += aHi * bLo; // aHi * bLo < 2^63, result < 2^64
        if (result < 0) {