}
        if (!fessConfig.isSearchFileProxyEnabled()) {
            return HtmlResponse.fromRedirectPathAsIs(targetUrl + hash);
        }
        final ViewHelper viewHelper = ComponentUtil.getViewHelper();
        try {
            final StreamResponse response = viewHelper.asContentResponse(doc);
            if (response.getHttpStatus().orElse(200) == 404) {
                logger.debug("Not found: {}", targetUrl);

            op.setup(form -> {
                buildFormParams(form);
            });
        }).renderWith(data -> {
            buildInitParams();
            RenderDataUtil.register(data, "helpPage", viewHelper.getPagePath("common/help"));
        });
    }

		<postConstruct name="addQueryRescorer">
			<arg>
				<component class="org.codelibs.fess.score.LtrQueryRescorer" />
			</arg>
		</postConstruct>
	</component>
	<component name="viewHelper" class="org.codelibs.fess.helper.ViewHelper">
	</component>
	<component name="userAgentHelper" class="org.codelibs.fess.helper.UserAgentHelper">
	</component>
	<component name="popularWordHelper" class="org.codelibs.fess.helper.PopularWordHelper">

    protected static final String USER_AGENT = "user-agent";

    /** The request attribute key for storing cached user agent type */
    protected static final String USER_AGENT_TYPE = "ViewHelper.UserAgent";

    /**
     * Determines the user agent type from the current HTTP request.
     * The method analyzes the User-Agent header to categorize the browser type

        }
        if (doc == null) {
            saveError(messages -> messages.addErrorsDocidNotFound(GLOBAL, form.docId));
            return redirect(ErrorAction.class);
        }

        final String content = viewHelper.createCacheContent(doc, form.hq);
        if (content == null) {
            saveError(messages -> messages.addErrorsDocidNotFound(GLOBAL, form.docId));
            return redirect(ErrorAction.class);
        }

        assertTrue(ComponentUtil.hasQueryParser());
    }

    public void test_hasViewHelper() {
        assertFalse(ComponentUtil.hasViewHelper());

        ComponentUtil.register(new Object(), "viewHelper");
        assertTrue(ComponentUtil.hasViewHelper());
    }

    public void test_hasQueryHelper() {
        assertFalse(ComponentUtil.hasQueryHelper());