errInvalidInternalSealAlgorithm = Errorf("The internal seal algorithm is invalid and not supported")
)

// errOutOfEntropy indicates that the a source of randomness (PRNG) wasn't able
// to produce enough random data. This is fatal error and should cause a panic.

## Crie um `websocket` { #create-a-websocket }

Em sua aplicação **FastAPI**, crie um `websocket`:

{* ../../docs_src/websockets/tutorial001_py39.py hl[1,46:47] *}

/// note | Detalhes Técnicos

Você também poderia usar `from starlette.websockets import WebSocket`.

A **FastAPI** fornece o mesmo `WebSocket` diretamente apenas como uma conveniência para você, o desenvolvedor. Mas ele vem diretamente do Starlette.

///

Wenn Sie jedoch benutzerdefinierte Header haben, die ein Client in einem Browser sehen soll, müssen Sie sie zu Ihrer CORS-Konfiguration ([CORS (Cross-Origin Resource Sharing)](cors.md){.internal-link target=_blank}) hinzufügen, indem Sie den Parameter `expose_headers` verwenden, der in der <a href="https://www.starlette.dev/middleware/#corsmiddleware" class="external-link" target="_blank">Starlettes CORS-Dokumentation</a> dokumentiert ist.

///

        DelegatingConfiguration config = new DelegatingConfiguration(testDelegate);

        // Then
        assertNotNull(config, "Configuration should be created");
    }

    @Test
    @DisplayName("Random access should delegate to underlying configuration")
    void testRandomDelegation() {
        // Given
        SecureRandom expectedRandom = new SecureRandom();
        when(mockDelegate.getRandom()).thenReturn(expectedRandom);

errors.login.failure = Inloggen mislukt.
errors.app.illegal.transition = Illegale overgang. Probeer het opnieuw.
errors.app.db.already.deleted = Mogelijk is het al verwijderd door een ander proces. Probeer de bewerking opnieuw.
errors.app.db.already.updated = Mogelijk is het al bijgewerkt door een ander proces. Probeer de bewerking opnieuw.
errors.app.db.already.exists = Gegevens bestaan al. Probeer de bewerking opnieuw.

	letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
	letterIdxMax  = 63 / letterIdxBits   // # of letter indices fitting in 63 bits
)

// Random number state.
// We generate random temporary file names so that there's a good
// chance the file doesn't exist yet.
var (
	randN  uint32
	randmu sync.Mutex
)

// Temp files created in default Tmp dir

import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertSame;
import static org.junit.jupiter.api.Assertions.assertTrue;

import java.util.Arrays;
import java.util.Random;
import java.util.stream.Stream;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;

            executor.submit(() -> {
                try {
                    startLatch.await();

                    for (int i = 0; i < opsPerThread; i++) {
                        if (Math.random() > 0.5) {
                            session.acquire();
                            Thread.yield(); // Increase chance of race conditions
                            session.release();
                        } else {

		policy    string
		signature string
		errCode   APIErrorCode
	}{
		{"invalidAccessKey", policy, calculateSignatureV2(policy, creds.SecretKey), ErrInvalidAccessKeyID},
		{creds.AccessKey, policy, calculateSignatureV2("random", creds.SecretKey), ErrSignatureDoesNotMatch},
		{creds.AccessKey, policy, calculateSignatureV2(policy, creds.SecretKey), ErrNone},
	}
	for i, test := range testCases {
		formValues := make(http.Header)

        byte[] hash1 = md5_1.digest(data);
        byte[] hash2 = md5_2.digest(data);

        // Then
        assertArrayEquals(hash1, hash2);
    }

    @Test
    @DisplayName("Should generate secure random bytes")
    void testSecureRandomGeneration() throws java.security.NoSuchAlgorithmException {
        // Given
        int length = 16;

        // When
        byte[] random1 = new byte[length];