}

	var checksumCombined []byte

	// However, in case of encryption, the persisted part ETags don't match
	// what we have sent to the client during PutObjectPart. The reason is
	// that ETags are encrypted. Hence, the client will send a list of complete
	// part ETags of which may not match the ETag of any part. For example
	//   ETag (client):          30902184f4e62dd8f98f0aaff810c626

      assertThat(expected.message)
        .isEqualTo("Client-sent frames must be masked.")
    }
  }

  @Test fun serverSentFramesMustNotBeMasked() {
    data.write("8180".decodeHex())
    assertFailsWith<ProtocolException> {
      clientReader.processNextFrame()
    }.also { expected ->
      assertThat(expected.message)
        .isEqualTo("Server-sent frames must not be masked.")
    }
  }

Esto significa que **cualquier valor** leído en Python desde una variable de entorno **será un `str`**, y cualquier conversión a un tipo diferente o cualquier validación tiene que hacerse en el código.

Ensuite votre API va (imaginons) :

* Envoyer la facture à un client de la personne développeuse externe.
* Encaisser l’argent.
* Renvoyer une notification à l’utilisateur de l’API (la personne développeuse externe).
    * Cela sera fait en envoyant une requête POST (depuis *votre API*) vers une *API externe* fournie par cette personne développeuse externe (c’est le « callback »).

## L’application **FastAPI** normale { #the-normal-fastapi-app }

Não propriamente a classe (que já é um chamável), mas a instância desta classe.

Para fazer isso, nós declaramos o método `__call__`:

{* ../../docs_src/dependencies/tutorial011_an_py310.py hl[12] *}

    /** Local port to bind for SMB connections */
    protected int smbLocalPort = 0;
    /** Maximum multiplex count for concurrent requests */
    protected int maxMpxCount = SmbConstants.DEFAULT_MAX_MPX_COUNT;
    /** Send buffer size for SMB socket operations */
    protected int smbSendBufferSize = SmbConstants.DEFAULT_SND_BUF_SIZE;
    /** Receive buffer size for SMB socket operations */

    const val DEFAULT_INITIAL_WINDOW_SIZE = 65535

    /** HTTP/2: Size in bytes of the table used to decode the sender's header blocks. */
    const val HEADER_TABLE_SIZE = 1

    /** HTTP/2: The peer must not send a PUSH_PROMISE frame when this is 0. */
    const val ENABLE_PUSH = 2

    /** Sender's maximum number of concurrent streams. */
    const val MAX_CONCURRENT_STREAMS = 3

    /** Window size in bytes. */

### Conditional Cache Hit

When cache flags require checking the cache results are still valid an early cacheConditionalHit event is
received followed by a cache hit or miss.  Critically in the cache hit scenario the server won’t send the response body.

The response will have non-null `cacheResponse` and `networkResponse`. The cacheResponse will be used as the top level
response only if the response code is HTTP/1.1 304 Not Modified.

 - CallStart

   */
  public val handshake: Handshake?,
  /**
   * Returns the name of the server the client requested via the SNI (Server Name Indication)
   * attribute in the TLS handshake. Unlike the rest of the HTTP exchange, this name is sent in
   * cleartext and may be monitored or blocked by a proxy or other middlebox.
   */
  public val handshakeServerNames: List<String>,
  /** A string like `GET` or `POST`. */
  public val method: String,
  /**

	return nil
}

// Step takes a string provided from a server (or just an empty string for the
// very first conversation step) and attempts to move the authentication
// conversation forward.  It returns a string to be sent to the server or an
// error if the server message is invalid.  Calling Step after a conversation
// completes is also an error.
func (x *XDGSCRAMClient) Step(challenge string) (response string, err error) {