return nil
	}

	region := globalSite.Region()
	cred := getReqAccessCred(r, region)

	principalID := cred.AccessKey
	if cred.ParentUser != "" {
		principalID = cred.ParentUser
	}

	// Success.
	m := map[string]string{
		"region":          region,
		"principalId":     principalID,
		"sourceIPAddress": handlers.GetSourceIP(r),
		// Add more fields here.
	}

			OutputToken: hex.EncodeToString(ckSum[:]),
		},
		UserRequest: levent.UserRequest{
			URL:     r.URL.String(),
			Headers: r.Header.Clone(),
		},
		UserIdentity: levent.Identity{
			Type:        "IAMUser",
			PrincipalID: cred.AccessKey,
			AccessKeyID: cred.SecretKey,
		},
	}
	return eventData, nil
}

var statusTextToCode = map[string]int{
	"Continue":                        http.StatusContinue,

C'est l'une des principales choses que **FastAPI** ajoute par-dessus, le tout basé sur les type hints Python (en utilisant Pydantic). Cela, plus le système d'injection de dépendances, les utilitaires de sécurité, la génération de schémas OpenAPI, etc.

/// note | "Détails techniques"

            // client/caller principal
            final SpnegoPrincipal principal;
            try {
                principal = getAuthenticator().authenticate(request, spnegoResponse);
                if (logger.isDebugEnabled()) {
                    logger.debug("principal: {}", principal);
                }
            } catch (final Exception e) {

    public static Subject getInitiatorSubject ( KeyTab keytab, final KerberosPrincipal principal ) throws Asn1Exception, KrbException, IOException {
        KerberosTicket ticket = getKerberosTicket(keytab, principal);
        Set<Object> privCreds = new HashSet<>();
        privCreds.add(ticket);
        return new Subject(false, new HashSet<>(Arrays.asList((Principal) principal)), Collections.EMPTY_SET, privCreds);
    }

                        final UserPrincipal principal = acl.principal();
                        if (logger.isDebugEnabled()) {
                            logger.debug("Principal: [{}] {}", principal.getClass().getName(), principal);
                        }
                        if (principal instanceof final GroupPrincipal groupPrincipal) {

bucketPolicyTemplate := `{"Version":"2012-10-17","Statement":[{"Sid":"","Effect":"Allow","Principal":{"AWS":["*"]},"Action":["s3:GetBucketLocation","s3:ListBucket"],"Resource":["arn:aws:s3:::%s"]},{"Sid":"","Effect":"Allow","Principal":{"AWS":["*"]},"Action":["s3:GetObject"],"Resource":["arn:aws:s3:::%s/this*"]}]}`

	bucketPolicyTemplateWithoutVersion := `{"Version":"","Statement":[{"Sid":"","Effect":"Allow","Principal":{"AWS":["*"]},"Action":["s3:GetBucketLocation","s3:ListBucket"],"Resource":["...

    }


    @Override
    public String getUserDomain () {
        if ( this.realm == null && this.getSubject() != null ) {
            Set<Principal> pr = this.getSubject().getPrincipals();
            for ( Iterator<Principal> ite = pr.iterator(); ite.hasNext(); ) {
                try {
                    KerberosPrincipal entry = (KerberosPrincipal) ite.next();
                    return entry.getRealm();

    val cipherSuite: CipherSuite = handshake.cipherSuite()
    val peerCertificates: List<Certificate> = handshake.peerCertificates()
    val peerPrincipal: Principal? = handshake.peerPrincipal()
    val localCertificates: List<Certificate> = handshake.localCertificates()
    val localPrincipal: Principal? = handshake.localPrincipal()
  }

  @Test @Disabled
  fun headers() {
    var headers: Headers = Headers.of("", "")

///

## O principal `FastAPI`

Agora, vamos ver o módulo em `app/main.py`.

Aqui é onde você importa e usa a classe `FastAPI`.

Este será o arquivo principal em seu aplicativo que une tudo.

E como a maior parte de sua lógica agora viverá em seu próprio módulo específico, o arquivo principal será bem simples.

### Importar `FastAPI`