* an open file (for cached responses). Failing to close the response body will leak resources and
 * may ultimately cause the application to slow down or crash.
 *
 * Both this class and [Response] implement [Closeable]. Closing a response simply
 * closes its response body. If you invoke [Call.execute] or implement [Callback.onResponse] you
 * must close this body by calling any of the following methods:
 *
 * * `Response.close()`

     * @throws CIFSException if an error occurs getting the output stream
     */
    OutputStream getOutput() throws CIFSException;

    /**
     * {@inheritDoc}
     *
     * @throws CIFSException if an error occurs closing the handle
     *
     * @see java.lang.AutoCloseable#close()
     */
    @Override
    void close() throws CIFSException;

    /**
     * Tests whether this file descriptor is open and valid.
     *

    taskFaker.runTasks()
    assertThat(client.closed).isFalse()
    server.processNextFrame() // Read client closing, send server close.
    server.listener.assertClosing(1000, "Hello!")
    server.webSocket!!.finishReader()
    server.webSocket!!.close(1000, "Goodbye!")
    client.processNextFrame() // Read server closing, close connection.
    taskFaker.runTasks()
    client.listener.assertClosing(1000, "Goodbye!")

    public void close() {
        if (connected && rpcHandle != null) {
            try {
                log.debug("Closing witness RPC client");
                rpcHandle.close();
                connected = false;
                rpcHandle = null;
            } catch (Exception e) {
                log.error("Error closing witness RPC client", e);
            }
        }
    }

        running.set(false);

        if (serverSocket != null && !serverSocket.isClosed()) {
            try {
                serverSocket.close();
            } catch (IOException e) {
                log.debug("Error closing server socket", e);
            }
        }

        if (serverThread != null) {
            try {
                serverThread.join(5000); // Wait up to 5 seconds
            } catch (InterruptedException e) {

        direction.directFrameworkDebug(fessConfig.isFrameworkDebug()); // basically false

        // you can add your own process when your application is booting or closing
        direction.directCurtainBefore(createCurtainBeforeHook());
        direction.directCurtainFinally(createCurtainFinallyHook()); // when destroy

        direction.directSecurity(createSecurityResourceProvider());

    @Nullable
    Path getPath();

    /**
     * Creates a new input stream to read the source contents.
     * Each call creates a fresh stream starting from the beginning.
     * The caller is responsible for closing the returned stream.
     *
     * @return a new input stream positioned at the start of the content
     * @throws IOException if the stream cannot be created or opened
     */
    @Nonnull

	if err = rlk.Close(); err != nil {
		t.Fatal(err)
	}

	// Now file should be closed.
	isClosed = rlk.IsClosed()
	if !isClosed {
		t.Fatal("File ref count should be zero")
	}

	// Closing a file again should result in invalid argument.
	if err = rlk.Close(); err != os.ErrInvalid {
		t.Fatal(err)
	}

	_, err = newRLockedFile(nil)
	if err != os.ErrInvalid {
		t.Fatal("Unexpected error", err)

        assertEquals(mockOutputStream, smbPipeHandle.getOutput(), "getOutput() should return the correct output stream.");
    }

    /**
     * Tests related to the lifecycle management of the handle (e.g., closing).
     */
    @Nested
    public class LifecycleManagementTest {

        /**
         * Verifies that the close method can be called without throwing an exception.

## Technical Details { #technical-details }

FastAPI implements some SSE best practices out of the box.

* Send a **"keep alive" `ping` comment** every 15 seconds when there hasn't been any message, to prevent some proxies from closing the connection, as suggested in the [HTML specification: Server-Sent Events](https://html.spec.whatwg.org/multipage/server-sent-events.html#authoring-notes).
* Set the `Cache-Control: no-cache` header to **prevent caching** of the stream.