org.infoscoop.web.WidgetConfServlet.java Source code

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Here is the source code for org.infoscoop.web.WidgetConfServlet.java

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/* infoScoop OpenSource
 * Copyright (C) 2010 Beacon IT Inc.
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * as published by the Free Software Foundation.
 * 
 * This program 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.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/lgpl-3.0-standalone.html>.
 */

package org.infoscoop.web;

import java.io.*;
import java.net.SocketTimeoutException;
import java.util.*;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.xml.parsers.SAXParserFactory;

import org.apache.commons.httpclient.ConnectTimeoutException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.infoscoop.util.I18NUtil;
import org.infoscoop.dao.WidgetDAO;
import org.infoscoop.service.WidgetConfService;
import org.infoscoop.util.SpringUtil;
import org.infoscoop.widgetconf.WidgetConfUtil;
import org.json.JSONObject;
import org.w3c.dom.Document;

public class WidgetConfServlet extends HttpServlet {

    private static final long serialVersionUID = "jp.co.beacon_it.msd.portal.web.WidgetConfServlet".hashCode();

    private static Log log = LogFactory.getLog(WidgetConfServlet.class);

    private SAXParserFactory factory;
    private int CACHE_LIFE_TIME = 360;//The default time is 2 hours.

    public void init(ServletConfig config) throws ServletException {

        super.init(config);

        String cacheLifeTime = config.getInitParameter("cacheLifeTime");
        try {
            if (cacheLifeTime != null)
                CACHE_LIFE_TIME = Integer.parseInt(cacheLifeTime);
        } catch (Exception e) {
            log.warn("cacheLifeTime must be a number. cacheLifeTime = " + cacheLifeTime);
        }
        if (log.isInfoEnabled())
            log.info("cacheLifeTime = " + CACHE_LIFE_TIME + " minutes");

        factory = SAXParserFactory.newInstance();
        factory.setNamespaceAware(true);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doPost(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/plain; charset=UTF-8");
        response.setHeader("Pragma", "no-cache");
        response.setHeader("Cache-Control", "no-cache");

        //String types = request.getParameter("types");
        String type = request.getParameter("type");
        //String displayFlag = request.getParameter("displayFlag");
        //String reload = request.getParameter("reload");

        Writer writer = response.getWriter();

        Locale locale = request.getLocale();

        WidgetConfService service = (WidgetConfService) SpringUtil.getBean("WidgetConfService");
        try {
            String json = null;
            //if (types != null) {
            //   json = getWidgetConfJSON(types.split(","), request);
            //} else if (displayFlag != null) {
            //   json = getWidgetConfRSSList(displayFlag, request);
            //} else {
            if (type != null) {
                if (type.startsWith("g_")) {
                    type = type.substring(2);

                    json = getGadgetConfJson(request, type, locale);
                } else {
                    json = service.getWidgetConfJsonByType(type, locale, true);
                }
            } else {
                String uid = (String) request.getSession().getAttribute("Uid");
                json = service.getWidgetConfsJson(uid, locale);
            }

            writer.write(json);
            // Copy from ProxyServlet
        } catch (SocketTimeoutException ex) {
            // When the status code was 408, Firefox did not move well.
            // Because the cords such as 10408 are converted into 500 by Apache-GlassFish cooperation, we set it in a header.Apache-GlassFish.
            log.error("", ex);
            response.setHeader(HttpStatusCode.HEADER_NAME, HttpStatusCode.MSD_SC_TIMEOUT);
            response.sendError(500);
        } catch (ConnectTimeoutException ex) {
            log.error("", ex);
            response.sendError(500, ex.getMessage());
        } catch (Exception e) {
            log.error("Unexpected exception occurred.", e);
            response.sendError(500, e.getMessage());
        } finally {
            writer.flush();
            //writer.close();
        }
    }

    private String getGadgetConfJson(HttpServletRequest request, String type, Locale locale) throws Exception {
        int timeout = request.getIntHeader("MSDPortal-Timeout") - 1000;
        WidgetConfUtil.GadgetContext context = new WidgetConfUtil.GadgetContext().setTimeout(timeout).setUrl(type);
        Document doc = context.getDocument(request);

        JSONObject jsonObj = WidgetConfUtil.gadget2JSONObject(doc.getDocumentElement(),
                context.getI18NConveter(locale, doc), true);
        jsonObj = WidgetConfUtil.gadgetJSONtoPortalGadgetJSON(jsonObj);

        return I18NUtil.resolve(I18NUtil.TYPE_WIDGET, jsonObj.toString(1), locale, true);
    }
}