com.mondospider.spiderlocationapi.SetSpiderLocation.java Source code

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Here is the source code for com.mondospider.spiderlocationapi.SetSpiderLocation.java

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/*
 * Copyright (C) 2010 The Mondospider Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.mondospider.spiderlocationapi;

import java.io.IOException;
import java.util.Date;

import javax.jdo.JDOObjectNotFoundException;
import javax.jdo.PersistenceManager;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.json.JSONException;
import org.json.JSONObject;

@SuppressWarnings("serial")
public class SetSpiderLocation extends HttpServlet {
    private static String secretKey = null;

    final JSONObject responseResp = new JSONObject();

    public SetSpiderLocation() {

        PersistenceManager pm = PMF.get().getPersistenceManager();

        Config c;
        try {
            c = pm.getObjectById(Config.class, "pref");

        } catch (JDOObjectNotFoundException e) {
            c = new Config();
            c.setSecretKey("defaultSecretKey");
            pm.makePersistent(c);
        } finally {
            pm.close();
        }

        secretKey = c.getSecretKey();

    }

    public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {

        if (!req.isSecure()) {
            resp.getWriter()
                    .println("{\"result:error\", \"reason\":\"SSL secured connection required for updates.\"}");
            return;
        }

        if (req.getParameter("lat") == null || req.getParameter("lng") == null || req.getParameter("pwd") == null) {
            //Display Error&Help
            try {
                req.getRequestDispatcher("/index.html").forward(req, resp);
            } catch (ServletException e) {
                resp.getWriter().println("{\"result:error\", \"reason\":\"Forward failed\"}");
                e.printStackTrace();
                return;
            }
        }

        // Permission Check
        String key = req.getParameter("pwd");
        if (!isSecretKeyTrue(key)) {
            // accessDenied
            resp.getWriter().println("{\"result:error\", \"reason\":\"Wrong Key\"}");
            return;
        }

        try {

            // Get lat/lng Parameters and validate
            double lat = 0;
            double lng = 0;

            try {
                lat = Double.parseDouble(req.getParameter("lat"));
                lng = Double.parseDouble(req.getParameter("lng"));
            } catch (NumberFormatException e) {
                responseResp.put("result", "error");
                responseResp.put("reason", "Parameter lat or log missing or invalid");

                resp.getWriter().println(responseResp.toString(2));

                return;
            }

            String status = req.getParameter("status");

            // Update Position
            updatePosition("spider", lat, lng, status);

            responseResp.put("result", "success");
            responseResp.put("updated_on", new Date());

            resp.setContentType("text/plain");

            resp.getWriter().println(responseResp.toString(2));
            return;

        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        resp.sendRedirect("/index.html");

    }

    private boolean isSecretKeyTrue(String key) {
        return key.equals(secretKey);
    }

    public void updatePosition(String username, double latitude, double longitude, String status) {

        PersistenceManager pm = PMF.get().getPersistenceManager();

        Location l = pm.getObjectById(Location.class, "spider");

        if (l == null) {
            l = new Location(username, latitude, longitude, status);
        }

        l.setLatetude(latitude);
        l.setLongitude(longitude);
        if (status != null && status.length() > 0) {
            l.setStatus(status);
        }

        try {
            pm.makePersistent(l);
        } finally {
            pm.close();
        }
    }

}