assertEquals("", documentHelper.getContent(null, responseData, null, dataMap));
        assertEquals("", documentHelper.getContent(null, responseData, "", dataMap));
        assertEquals("", documentHelper.getContent(null, responseData, " ", dataMap));
        assertEquals("", documentHelper.getContent(null, responseData, "  ", dataMap));
        assertEquals("", documentHelper.getContent(null, responseData, "\t", dataMap));

        CloseableUtil.closeQuietly(in);
        logger.info(content);
        assertTrue(content.contains("テスト"));
    }

    public void test_getTika_hpp() {
        final InputStream in = ResourceUtil.getResourceAsStream("extractor/program/test.hpp");
        final ExtractData extractData = tikaExtractor.getText(in, null);
        final String content = extractData.getContent();

                        buf.append(bodyPart.getContent().toString()).append(' ');
                    } else if (bodyPart.isMimeType("multipart/alternative") && bodyPart.getContent() instanceof Multipart) {
                        final Multipart alternativePart = (Multipart) bodyPart.getContent();
                        for (int j = 0; j < alternativePart.getCount(); j++) {

                } else {
                    String content;
                    try {
                        content = new String(InputStreamUtil.getBytes(entity.getContent()), Constants.UTF_8_CHARSET);
                    } catch (final IOException e) {
                        content = e.getMessage();
                    }

    }

    public Object getContent() throws IOException {
        try {
            handshake();
        } catch (IOException ex) { }
        return connection.getContent();
    }

    public Object getContent(Class[] classes) throws IOException {
        try {
            handshake();
        } catch (IOException ex) { }
        return connection.getContent(classes);
    }

                final Parser parser = new TikaDetectParser();
                final ParseContext parseContext = createParseContext(parser, params);

                String content = getContent(writer -> {
                    InputStream in = null;
                    try {
                        if (!isByteStream) {
                            try (OutputStream out = new FileOutputStream(tempFile)) {

    }


    @Override
    public Object getContent () throws IOException {
        handshake();
        return this.connection.getContent();
    }


    @Override
    public Object getContent ( Class[] classes ) throws IOException {
        handshake();
        return this.connection.getContent(classes);
    }


    @Override

        try (final InputStream in = responseData.getResponseBody()) {
            final ExtractData extractData = getExtractData(extractor, in, createExtractParams(responseData, crawlingConfig));
            content = extractData.getContent();
            if (fessConfig.isCrawlerDocumentFileIgnoreEmptyContent() && StringUtil.isBlank(content)) {
                return null;
            }
            if (getLogger().isDebugEnabled()) {

        }
        return type.getNameAsString();
    }

    private String getJavadocComment(NodeWithJavadoc<?> node) {
        return node.getJavadocComment().map(Comment::getContent).orElse("");
    }

                .header("Accept", "application/json").execute()) {
            final Map<String, Object> contentMap = response.getContent(OpenSearchCurl.jsonParser());
            if (logger.isDebugEnabled()) {
                logger.debug("response: {}", contentMap);
            }
            if (contentMap.containsKey("value")) {