// Test case 1: SVG MIME type should match
            Map<String, Object> svgDocMap = new HashMap<>();
            svgDocMap.put("thumbnail", "http://example.com/image.svg");
            svgDocMap.put("mimetype", "image/svg+xml");
            assertTrue("SVG MIME type should be target", generator.isTarget(svgDocMap));

            // Test case 2: Different MIME type should not match

import org.codelibs.fess.util.ComponentUtil;

import jakarta.annotation.PostConstruct;

/**
 * FessMimeTypeHelper extends MimeTypeHelperImpl to provide Fess-specific
 * MIME type detection configuration. It reads extension-to-MIME-type override
 * mappings from FessConfig to handle cases where content-based detection
 * produces incorrect results (e.g., SQL files starting with REM comments
 * being misdetected as batch files).

import org.codelibs.fess.unit.UnitFessTestCase;
import org.junit.jupiter.api.Test;

/**
 * Test class for MIME type patterns defined in crawler/rule.xml.
 * Verifies that regex patterns correctly match MIME types with special characters.
 *
 * This test ensures that the + character in MIME types like application/xhtml+xml
 * is properly escaped in regex patterns to match literally.
 */

		<postConstruct name="addRule">
			<arg>"url"</arg>
			<arg>"http[s]?:.*"</arg>
		</postConstruct>
		<postConstruct name="addRule">
			<arg>"mimeType"</arg>
			<!-- Supported MIME type -->
			<arg>"text/html"</arg>
		</postConstruct>
	</component>

	<component name="webFileRule" class="org.codelibs.fess.crawler.rule.impl.RegexRule" >
		<property name="ruleId">"webFileRule"</property>

    }

    // ==================== Tests for getExtensionFromMimeType method ====================

    // Tests for GIF MIME type
    @Test
    public void test_getExtensionFromMimeType_gif() {
        assertEquals(".gif", generator.getExtensionFromMimeType("image/gif"));
    }

    // Tests for TIFF MIME type
    @Test
    public void test_getExtensionFromMimeType_tiff() {

        });

    }

    /**
     * Checks if the response data contains an image MIME type that can be processed
     * for thumbnail generation.
     *
     * @param responseData the response data containing MIME type information
     * @return true if the MIME type represents a supported image format, false otherwise
     */
    protected boolean isImageMimeType(final ResponseData responseData) {

     */
    @Override
    public Logger getLogger() {
        return logger;
    }

    /**
     * Gets the appropriate extractor for the given response data.
     * Selects an extractor based on the MIME type of the file.
     *
     * @param responseData the response data containing the file to extract
     * @return the extractor instance for processing the file

     *
     * @param objectName the name/path for the object
     * @param inputStream the input stream of data to upload
     * @param size the size of the data in bytes
     * @param contentType the MIME type of the content
     */
    void uploadObject(String objectName, InputStream inputStream, long size, String contentType);

    /**
     * Downloads an object from storage.
     *

    public void setProxyCredentials(final Credentials proxyCredentials) {
        this.proxyCredentials = proxyCredentials;
    }

    /**
     * Sets the default MIME type for unknown content.
     *
     * @param defaultMimeType The default MIME type
     */
    public void setDefaultMimeType(final String defaultMimeType) {
        this.defaultMimeType = defaultMimeType;
    }

    /**

- **SitemapsHelper**: Sitemap XML parsing, index handling
- **MimeTypeHelper**: MIME detection via Tika
- **EncodingHelper**: Charset detection with BOM
- **UrlConvertHelper**: URL normalization
- **ContentLengthHelper**: Content length limits per MIME type

---

## Development Workflow

### Build Commands

```bash
mvn clean install              # Build all