recommendation.java

Java的wap push

package push;

import push.Winner;
import members.Members;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;

/**
 * A class that demonstrates a push service for recommending a site to a friend
 * (by a push message).
 * 
 * @version 1.0
 * @since 1.0
 * @see HttpServlet
 */
public final class Recommendation extends HttpServlet {

	private static final String XML_VERSION = "<?xml version=\"1.0\"?>";
	private static final String CONTENT_TYPE = "text/vnd.wap.wml";
	private static final String DOC_TYPE = "<!DOCTYPE wml PUBLIC \"-//WAPFORUM//DTD WML 1.1//EN\"\n"
			+ "  \"http://www.wapforum.org/DTD/wml_1.1.xml\">";

	private static int numberOfQuestions = 0;
	private static String grades;
	private static final Vector questions = new Vector();
	private static final String HOME_PAGE = "/index.jsp";
	private static String feedbackFile = null;

	private static Winner winner = null;

	private static String pushAddressType = null;

	/**
	 * <code>doGet</code>
	 * 
	 * @param request
	 *            a <code>HttpServletRequest</code> value
	 * @param response
	 *            a <code>HttpServletResponse</code> value
	 * @exception ServletException
	 *                if an error occurs
	 * @exception IOException
	 *                if an error occurs
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request, response);
	}

	/**
	 * <code>doPost</code>
	 * 
	 * @param request
	 *            a <code>HttpServletRequest</code> value
	 * @param response
	 *            a <code>HttpServletResponse</code> value
	 * @exception ServletException
	 *                if an error occurs
	 * @exception IOException
	 *                if an error occurs
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		/* Session tracking. See the description in index.jsp */
		HttpSession session = request.getSession();
		boolean cookiesCheck = request.getHeader("cookie") != null
				&& request.isRequestedSessionIdValid();
		final String jsessionID = cookiesCheck ? "" : ";jsessionid="
				+ session.getId();

		String action = request.getParameter("action");
		if (action == null)
			action = "";
		pushAddressType = Members.getPushAddressType();

		/* start generating the response ... */
		response.setContentType(CONTENT_TYPE);
		/* prevent caching of the response */
		response.setHeader("cache-control", "no-cache");
		PrintWriter out = response.getWriter();

		out.println(XML_VERSION);
		out.println(DOC_TYPE);
		out.println("<wml>");

		out.println("<!-- provides a way back using the prev element -->\n"
				+ "<template>" + " <do type=\"prev\">" + "  <prev/>" + " </do>"
				+ "</template>");

		if (session.getAttribute("name") == null) {
			out
					.println("<!-- This service can be only accessed by members -->\n"
							+ "<card title=\"Members  only\" id=\"thanks\">"
							+ " <do type=\"accept\" label=\"Ok\">"
							+ "  <go href=\""
							+ request.getContextPath()
							+ HOME_PAGE
							+ jsessionID
							+ "\"/>"
							+ " </do>"
							+ " <p>This service is provided only for members.<br/>"
							+ " <anchor title=\"Ok\">Ok"
							+ "  <go href=\""
							+ request.getContextPath()
							+ HOME_PAGE
							+ jsessionID
							+ "\"/>" + " </anchor>" + " </p>" + "</card>");

		} else if (!action.equals("push")) {
			out
					.println("<!-- Push message form -->\n"
							+ "<card title=\"Tell a friend\" id=\"friend\" newcontext=\"true\">"
							+ "<p>Tell a friend:<br/>"
							+ "Name: <input name=\"name\"/>"
							+ (pushAddressType.equals("PLMN") ? "Phone: <input name=\"phone\" format=\"*N\"/>"
									: "IP address: <input name=\"ip\"/>")
							+ "Message: <input name=\"message\" value=\"Your friend recommends that you visit WML Zoo. See you there!\"/>"
							+ "  <anchor title=\"Send push message\">Send push message"
							+ "   <go method=\"post\" href=\""
							+ request.getRequestURI()
							+ jsessionID
							+ "\">"
							+ "    <postfield name=\"name\" value=\"$(name)\"/>"
							+ (pushAddressType.equals("PLMN") ? "    <postfield name=\"phone\" value=\"$(phone)\"/>"
									: "    <postfield name=\"ip\" value=\"$(ip)\"/>")
							+ "    <postfield name=\"message\" value=\"$(message)\"/>"
							+ "    <postfield name=\"action\" value=\"push\"/>"
							+ "   </go></anchor>" + "  </p></card>");

		} else {
			PushInitiator pusher = Members.getInitiator();
			/* next, send the push message */
			String recommendedUrl = "http://" + request.getServerName() + ":"
					+ request.getServerPort() + request.getContextPath();
			String pushMessage = request.getParameter("message");
			String friendName = request.getParameter("name");
			System.out.println("friend = " + friendName);
			System.out.println("addresstype = " + pushAddressType);
			boolean sended = false;
			String message = PushInitiator.createSiMessage(recommendedUrl,
					null, null, null, null, pushMessage);
			String errorReason = "";
			try {
				/*
				 * Check the default address type. If it is IPv4 then send the
				 * message by using the IP address of the friend. If PLMN then
				 * send the message to the given phone number. If the address
				 * (IP or phone number) is not given, the friend should has
				 * currently active session
				 */
				if (pushAddressType.equals("IPv4")) {
					String ip = request.getParameter("ip");
					System.out.println("ip= " + ip);
					if (ip != null && !ip.trim().equals("")) {
						pusher.sendPushMessage(ip, pushAddressType, message,
								PushService.SI_CONTENT_TYPE);
						System.out.println("Push message sent to address: "
								+ ip);
						sended = true;
					} else {
						User friendUser = User.findUser(friendName);
						System.out.println("friendUser = " + friendUser);
						if (friendUser != null) {
							pusher.sendPushMessage(friendUser.getAddress(),
									pushAddressType, message,
									PushService.SI_CONTENT_TYPE);
							System.out.println("Push message sent to address: "
									+ friendUser.getAddress());
							sended = true;
						} else
							errorReason = "Your friend " + friendName
									+ " is not currently on line!";
					}
				} else if (pushAddressType.equals("PLMN")) {
					String phone = request.getParameter("phone");
					System.out.println("phone number= " + phone);
					if (phone == null || (phone = phone.trim()).equals("")) {
						/*
						 * If the phone number is not given, try to find from
						 * the database
						 */
						User friendUser = User.findUser(friendName);
						if (friendUser != null)
							phone = friendUser.getAddress(pushAddressType);
					}
					if (phone != null && !(phone = phone.trim()).equals("")) {
						pusher.sendPushMessage(phone, pushAddressType, message,
								PushService.SI_CONTENT_TYPE);
						System.out.println("Push message sent to number: "
								+ phone);
						sended = true;
					} else
						errorReason = "phone number is not given?";
				} else
					throw new Exception("wrong push-addresstype: "
							+ pushAddressType);
			} catch (Exception e) {
				System.err.println(e);
				errorReason = e.toString();
			}

			if (sended) {
				out
						.println("<!-- Thanks for the recommendation -->\n"
								+ "<card title=\"Thank you\" id=\"thanks\">"
								+ " <do type=\"accept\" label=\"Ok\">"
								+ "  <go href=\""
								+ request.getContextPath()
								+ HOME_PAGE
								+ jsessionID
								+ "\"/>"
								+ " </do>"
								+ " <p>Your message has been delivered.<br/>Thank you for recommending our zoo to your friend!<br/>"
								+ " <anchor title=\"Ok\">Ok" + "  <go href=\""
								+ request.getContextPath() + HOME_PAGE
								+ jsessionID + "\"/>" + " </anchor>" + " </p>"
								+ "</card>");
			} else {
				out
						.println("<card title=\""
								+ errorReason
								+ "\" id=\"error\">"
								+ " <do type=\"accept\" label=\"Ok\">"
								+ "  <go href=\""
								+ request.getContextPath()
								+ HOME_PAGE
								+ jsessionID
								+ "\"/>"
								+ " </do>"
								+ " <p>Your message has not been delivered.<br/>The possible reason is: "
								+ errorReason + " <br/><anchor title=\"Ok\">Ok"
								+ "  <go href=\"" + request.getContextPath()
								+ HOME_PAGE + jsessionID + "\"/>"
								+ " </anchor>" + " </p>" + "</card>");
			}

		}
		out.println("</wml>");
	}

}