try {
            mimeTypeHelper.getContentType(null, "");
            fail();
        } catch (final MimeTypeException e) {}

        assertEquals("text/plain", mimeTypeHelper.getContentType(is, ""));
        assertEquals("text/plain", mimeTypeHelper.getContentType(is, " "));
    }

        }
    }

    @Override
    public String getContentType(final InputStream is, final String filename) {
        final Map<String, String> params = new HashMap<>();
        params.put(ExtractData.RESOURCE_NAME_KEY, filename);
        return getContentType(is, params);
    }

    @Override
    public String getContentType(final InputStream is, final Map<String, String> params) {

package org.codelibs.fess.crawler.helper;

import java.io.InputStream;
import java.util.Map;

/**
 * @author shinsuke
 *
 */
public interface MimeTypeHelper {
    String getContentType(InputStream is, String filename);

    String getContentType(InputStream is, Map<String, String> params);

                            responseData.setMimeType(mimeTypeHelper.getContentType(is, file.getName()));
                        } catch (final Exception e) {
                            responseData.setMimeType(mimeTypeHelper.getContentType(null, file.getName()));
                        }
                    } else {
                        if (logger.isDebugEnabled()) {

                            responseData.setMimeType(mimeTypeHelper.getContentType(is, file.getName()));
                        } catch (final Exception e) {
                            responseData.setMimeType(mimeTypeHelper.getContentType(null, file.getName()));
                        }
                    } else {
                        if (logger.isDebugEnabled()) {

                        responseData.setMimeType(mimeTypeHelper.getContentType(is, file.getName()));
                    } catch (final Exception e) {
                        responseData.setMimeType(mimeTypeHelper.getContentType(null, file.getName()));
                    }

                    if (contentLengthHelper != null) {

            public static final String MULTIPART_FORMDATA_TYPE = "multipart/form-data";

            public static boolean isMultipartRequest(HttpServletRequest request) {
                return request.getContentType() != null && request.getContentType().startsWith(MULTIPART_FORMDATA_TYPE);
            }

            @Override
            public void handle(String target, HttpServletRequest request, HttpServletResponse response, int dispatch)

        final MimeTypeHelper mimeTypeHelper = crawlerContainer.getComponent("mimeTypeHelper");
        try (InputStream is = getContentInputStream(out)) {
            return mimeTypeHelper.getContentType(is, filename);
        }
    }

    protected InputStream getContentInputStream(final DeferredFileOutputStream out) throws IOException {
        if (out.isInMemory()) {

                }
                final String filename = entry.getName();
                final String mimeType = mimeTypeHelper.getContentType(null, filename);
                if (mimeType != null) {
                    final Extractor extractor = extractorFactory.getExtractor(mimeType);
                    if (extractor != null) {
                        try {

                }
                final String filename = head.getPath();
                final String mimeType = mimeTypeHelper.getContentType(null, filename);
                if (mimeType != null) {
                    final Extractor extractor = extractorFactory.getExtractor(mimeType);
                    if (extractor != null) {