WidgetServlet.java

/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.portal.servlet;

import com.liferay.portal.kernel.exception.NoSuchLayoutException;
import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.util.GetterUtil;
import com.liferay.portal.kernel.util.ParamUtil;
import com.liferay.portal.kernel.util.Portal;
import com.liferay.portal.kernel.util.PortalUtil;
import com.liferay.portal.kernel.util.Validator;
import com.liferay.portal.kernel.util.WebKeys;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author Brian Wing Shun Chan
 */
public class WidgetServlet extends HttpServlet {

	@Override
	public void service(
			HttpServletRequest request, HttpServletResponse response)
		throws IOException, ServletException {

		try {
			String redirect = getRedirect(request);

			if ((redirect == null) || !PortalUtil.isValidResourceId(redirect)) {
				PortalUtil.sendError(
					HttpServletResponse.SC_NOT_FOUND,
					new NoSuchLayoutException(), request, response);
			}
			else {
				request.setAttribute(WebKeys.WIDGET, Boolean.TRUE);

				ServletContext servletContext = getServletContext();

				RequestDispatcher requestDispatcher =
					servletContext.getRequestDispatcher(redirect);

				requestDispatcher.forward(request, response);
			}
		}
		catch (Exception e) {
			_log.error(e, e);

			PortalUtil.sendError(
				HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e, request,
				response);
		}
	}

	protected String getRedirect(HttpServletRequest request) {
		String path = GetterUtil.getString(request.getPathInfo());

		if (Validator.isNull(path)) {
			return null;
		}

		String ppid = ParamUtil.getString(request, "p_p_id");

		int pos = path.indexOf(Portal.FRIENDLY_URL_SEPARATOR);

		if (Validator.isNull(ppid) && (pos == -1)) {
			return null;
		}

		return path;
	}

	private static final Log _log = LogFactoryUtil.getLog(WidgetServlet.class);

}