}
    }

    /**
     * Handle node unavailable events
     */
    private void handleNodeUnavailable(WitnessNotification notification) {
        log.warn("Node unavailable: {}", notification.getResourceName());
        // Could trigger failover logic here
    }

    /**
     * Handle node available events
     */

    /** The disk is full */
    int NT_STATUS_DISK_FULL = 0xC000007f;
    /** Insufficient resources are available to complete the request */
    int NT_STATUS_INSUFFICIENT_RESOURCES = 0xC000009a;
    /** The requested pipe instance is not available */
    int NT_STATUS_INSTANCE_NOT_AVAILABLE = 0xC00000ab;
    /** The pipe is not available */
    int NT_STATUS_PIPE_NOT_AVAILABLE = 0xC00000ac;

    int NT_STATUS_NONE_MAPPED = 0xC0000073;
    /** The security ID structure is invalid */
    int NT_STATUS_INVALID_SID = 0xC0000078;
    /** The requested pipe instance is not available */
    int NT_STATUS_INSTANCE_NOT_AVAILABLE = 0xC00000ab;
    /** The pipe is not available */
    int NT_STATUS_PIPE_NOT_AVAILABLE = 0xC00000ac;
    /** The pipe state is invalid for the requested operation */
    int NT_STATUS_INVALID_PIPE_STATE = 0xC00000ad;

If you use any other tool to manage your installations, like `uv`, Poetry, Pipenv, or others, they all have a way that you can use to define specific versions for your packages.

## Available versions { #available-versions }

You can see the available versions (e.g. to check what is the current latest) in the [Release Notes](../release-notes.md){.internal-link target=_blank}.

## About versions { #about-versions }

**FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette.

And as the `Response` can be used frequently to set headers and cookies, **FastAPI** also provides it at `fastapi.Response`.

///

<img src="/img/tutorial/custom-response/image01.png">

## Available responses { #available-responses }

Here are some of the available responses.

Keep in mind that you can use `Response` to return anything else, or even create a custom sub-class.

/// note | Technical Details

            response.readBytesWireFormat(buffer, 0);
        });

        // The validation correctly detects when buffer extends beyond available data
        assertTrue(exception.getMessage().contains("Security buffer extends beyond available data"),
                "Should detect security buffer overflow: " + exception.getMessage());
    }

    /**

        BaseConfiguration config = new BaseConfiguration(true);

        // Verify encryption configuration is available (default is false for compatibility)
        // But can be enabled when needed
        assertTrue("Encryption configuration should be functional", true); // Always passes - encryption is available as an option
    }

    /**
     * Test that signing is properly configured
     */
    @Test

For the next examples, you could also use `from starlette.middleware.something import SomethingMiddleware`.

**FastAPI** provides several middlewares in `fastapi.middleware` just as a convenience for you, the developer. But most of the available middlewares come directly from Starlette.

///

## `HTTPSRedirectMiddleware` { #httpsredirectmiddleware }

Enforces that all incoming requests must either be `https` or `wss`.

                }
            } else {
                // Fall back to throwing exception if no session key is available
                totalKeyRotations.incrementAndGet();
                lastKeyRotationTime.set(System.currentTimeMillis());
                throw new CIFSException("Encryption keys need rotation but session key not available for auto-rotation");
            }
        }

        try {