// invalid cases
        url = "http://hoge/index.html;jsessionid";
        assertEquals("http://hoge/index.html;jsessionid", htmlTransformer.normalizeUrl(url));

        url = "http://hoge/index.html;jsessionid?a=1#HOGE";
        assertEquals("http://hoge/index.html;jsessionid?a=1", htmlTransformer.normalizeUrl(url));

        url = "http://hoge/aaa/../index.html";

        if (idx >= 0) {
            url = url.substring(0, idx);
        }

        url = url.replace("/./", "/");

        idx = url.indexOf(";jsessionid");
        if (idx >= 0) {
            url = url.replaceFirst(";jsessionid=[a-zA-Z0-9\\.]*", "");
        }

        if (url.indexOf(' ') >= 0) {
            url = url.replace(" ", "%20");
        }

        String oldUrl = null;

        try {
            processHelper.startProcess(sessionId, cmdList, pbCall);

            Set<String> sessionIds = processHelper.getRunningSessionIdSet();
            assertTrue(sessionIds.contains(sessionId));

            processHelper.destroyProcess(sessionId);

            sessionIds = processHelper.getRunningSessionIdSet();
            assertFalse(sessionIds.contains(sessionId));
        } catch (Exception e) {

            crawler2.getCrawlerContext().setNumOfThread(numOfThread);

            final String sessionId1 = crawler1.execute();
            final String sessionId2 = crawler2.execute();

            assertNotSame(sessionId1, sessionId2);
            assertNotSame(crawler1.crawlerContext, crawler2.crawlerContext);

            // Wait for both crawlers to start with polling

            crawler2.getCrawlerContext().setNumOfThread(numOfThread);

            final String sessionId1 = crawler1.execute();
            final String sessionId2 = crawler2.execute();

            assertNotSame(sessionId1, sessionId2);
            assertNotSame(crawler1.crawlerContext, crawler2.crawlerContext);

            for (int i = 0; i < 100; i++) {

        preauthService.initializeSession(sessionId, salt, PreauthIntegrityService.HASH_ALGO_SHA512);

        // Simulate message exchange
        preauthService.updatePreauthHash(sessionId, "Message1".getBytes());
        preauthService.updatePreauthHash(sessionId, "Message2".getBytes());

        byte[] expectedHash = preauthService.getCurrentPreauthHash(sessionId);

        // Validation should pass with correct hash

            crawler2.getCrawlerContext().setNumOfThread(numOfThread);

            final String sessionId1 = crawler1.execute();
            final String sessionId2 = crawler2.execute();

            assertNotSame(sessionId1, sessionId2);
            assertNotSame(crawler1.crawlerContext, crawler2.crawlerContext);

            // Wait for both crawlers to start with polling

        assertArrayEquals(testKey, rawKey2, "Should still match original");
    }

    @Test
    public void testRemoveSessionKey() {
        String sessionId = "test-session-3";
        keyManager.storeSessionKey(sessionId, testKey, "AES");

        assertTrue(keyManager.hasSessionKey(sessionId), "Key should exist");

        keyManager.removeSessionKey(sessionId);

     * Returns the session ID.
     * @return The session ID.
     */
    public String getSessionId() {
        return sessionId;
    }

    /**
     * Sets the session ID.
     * @param sessionId The session ID.
     */
    public void setSessionId(final String sessionId) {
        this.sessionId = sessionId;
    }

    /**
     * Returns the filter type.
     * @return The filter type.
     */

        crawler.crawlerContext.setNumOfThread(5);
        crawler.urlFilter.addInclude("https://example.com/.*");
        
        // Execute crawling
        String sessionId = crawler.execute();
        System.out.println("Crawling completed. Session ID: " + sessionId);
    }
}
```

### File System Crawling

```java
import org.codelibs.fess.crawler.client.fs.FileSystemClient;

// Configure for file system crawling