// 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;

        assertEquals(0, patterns.size());
    }

    public void test_delete_multipleSessions() {
        final String sessionId1 = "session7";
        final String sessionId2 = "session8";

        urlFilterService.addIncludeUrlFilter(sessionId1, "http://example.com/.*");
        urlFilterService.addIncludeUrlFilter(sessionId2, "http://test.com/.*");

            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

        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);

        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

        final BeanDesc beanDesc = BeanDescFactory.getBeanDesc(target.getClass());
        final PropertyDesc sessionIdProp = beanDesc.getPropertyDesc(SESSION_ID);
        final Object sessionId = sessionIdProp.getValue(target);
        return sessionId == null ? null : sessionId.toString();
    }

    /**
     * Sets the ID on the target object using reflection.
     *
     * @param target The target object.

        // Store in memory
        sessionKeys.put(sessionId, secretKey);
        rawKeys.put(sessionId, keyClone);

        // Track creation time for rotation (only for non-archived keys)
        if (!sessionId.contains(".v")) {
            keyCreationTimes.put(sessionId, System.currentTimeMillis());
            keyVersions.putIfAbsent(sessionId, 0);
        }

        // Optionally store in KeyStore