info.java

WAPpush WAP Push实现源码！

package info;

import commercials.Commercials;
import members.Members;
import feedback.Feedback;
import javax.servlet.*;
import javax.servlet.http.*;
import java.text.SimpleDateFormat;
import java.sql.*;
import java.io.*;
import java.util.*;

/**
 * Info pages
 *
 */
public final class Info 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 SI_CONTENT_TYPE = "text/vnd.wap.si";
    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\">";

    /**
     * Called by the server to allow a servlet to handle a GET request. 
     *
     * @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);
    }

    /**
     * Called by the server to allow a servlet to handle a POST request.
     *
     * @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 dob = null; String name = null; String sex = null; String email = null; String pushMessages = null;

	/* get user information from the current session object */
	try{
	    name = (String)session.getAttribute("name");
	    dob = (String)session.getAttribute("dob");
	    sex = (String)session.getAttribute("sex");
	    email = (String)session.getAttribute("email");
	    pushMessages = (String)session.getAttribute("pushservices");
	}
	catch (Exception E){
	    E.printStackTrace();
	}

	/* check if WTAI functionality is supported by the client user agent */
	final boolean wtaiSupport = wtaiSupported(request);

	/* Administrator's user name */
	final String ADMIN_USER = "admin";

	/* 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>");

	out.println("<!-- Information page about news, opening hours, prices etc -->\n" +
		    "<card title=\"Info\" id=\"main\">");
	boolean showAdminMenu = name != null && name.equals(ADMIN_USER);

	if (showAdminMenu) {
	    out.println("<!-- only for System Administrator an \"AdminMenu\" is shown -->\n" +
			"<do type=\"accept\" label=\"AdminMenu\" name=\"1\">\n" + 
			" <go href=\"" + request.getRequestURI() + jsessionID + "#admin\"/>\n" +
			"</do>\n" +
			"<p><anchor title=\"Admin info\">Admin info" +
			"  <go href=\"" + request.getRequestURI() + jsessionID + "#admin\"/>\n" +
			"</anchor></p>");
	} 
	String commercial = Commercials.getRandomCommercial();
	out.println(" <do type=\"accept\" label=\"New\" name=\"new\">" +
		    "  <go href=\"" + request.getRequestURI() + jsessionID + "#new\"/>" +
		    " </do>" +
		    " <do type=\"accept\" label=\"Opening hours\" name=\"open\">" +
		    "  <go href=\"" + request.getRequestURI() + jsessionID + "#open\"/>" +
		    " </do>" +
		    " <do type=\"accept\" label=\"Prices\" name=\"prices\">" +
		    "  <go href=\"" + request.getRequestURI() + jsessionID + "#prices\"/>" +
		    " </do>" +
		    " <do type=\"accept\" label=\"Contact\" name=\"contact\">" +
		    "  <go href=\"" + request.getRequestURI() + jsessionID + "#contact\"/>" +
		    " </do>" + 
		    " <p>" + 
		    (!commercial.equals("") ? "*** " + commercial + "***<br/>" : "") + 
		    "  <anchor title=\"New\">New" +
		    "   <go href=\"" + request.getRequestURI() + jsessionID + "#new\"/>" +
		    "  </anchor><br/>" +
		    "  <anchor title=\"Opening hours\">Opening hours" +
		    "   <go href=\"" + request.getRequestURI() + jsessionID + "#open\"/>" +
		    "  </anchor><br/>" +
		    "  <anchor title=\"Prices\">Prices" +
		    "   <go href=\"" + request.getRequestURI() + jsessionID + "#prices\"/>" +
		    "  </anchor><br/>" +
		    "  <anchor title=\"Contact\">Contact" +
		    "   <go href=\"" + request.getRequestURI() + jsessionID + "#contact\"/>" +
		    "  </anchor>" +
		    " </p>" +
		    "</card>");
	out.println("<!--  A card displaying opening hours of the Mobile Zoo  -->" +
		    "<card title=\"Opening hours\" id=\"open\">" +
		    " <p><strong>Mon-Fri:</strong>&#160;10am-8pm<br/>" +
		    "  <strong>Sat-Sun:</strong>&#160;12am-9pm</p>" +
		    "</card>");
	out.println("<!-- Contact information -->" +
		    "<card title=\"Contact information\" id=\"contact\">" +
		    " <p>Zoo Hill 7, 33101 Zootown<br/>");
	if(wtaiSupport) {
	    out.println("<anchor title=\"Make call\">tel. [phone]" +
			" <go href=\"wtai://wp/mc;555555555\"/>" +
			"</anchor><br/>");	
	} else {
	    out.println("tel. [phone]<br/>");
	}
	out.println(" <anchor title=\"Feedback\">Feedback" +
		    "   <go href=\"feedback" + jsessionID+ "\"/>" +
		    " </anchor></p>" +
		    "</card>");
	out.println("<card title=\"New\" id=\"new\">" +
		    " <p><strong>Today:</strong>&#160;Check out our new \"Safari\" family restaurant next to the gate! Exotic cuisine in exotic setting!<br/>" +
		    "  <strong>Last week:</strong> &#160; Flamingo pond is re-opened after the renovation." +
		    " </p>" +
		    "</card>");
	out.println("<card title=\"Prices\" id=\"prices\">" +
		    "<p>Adults: 5 &#x20AC;<br/>" +
		    "Children: 3 &#x20AC;<br/>" +
		    "Pensioners: 3 &#x20AC;<br/>" +
		    "Season pass: 20 &#x20AC;<br/>");
	if (dob != null) {
	    out.println("Member information:<br/>");
	    try {
		int age = ageCalculator(dob);
		if(age < 16) {
		    out.println("<em>Today free entry for children!</em>");
		}
		else if(age < 65) {
		    out.println("Special offer for you &#160;<strong>" + name + "</strong>! &#160;<em>As a member you will get" + 
				" 2  &#x20AC; reduction out of the normal Adults ticket price.</em>");
		}
		else {
		    out.println("<em>Today free entry for all senior members of the Zoo!</em>");
		}
	    }
	    catch (Exception E) {
		// E.printStackTrace();
	    }
	}
	out.println(" </p>"  + 
		    "</card>");
	if (showAdminMenu) { 
	    out.println("<card title=\"Administrator's info\" id=\"admin\">" +
			" <p><anchor title=\"Feedback\">Feedback" +
			"   <go href=\"" + request.getRequestURI() + jsessionID  + "#votestats\"/>" +
			"  </anchor><br/>" +
			"  <anchor title=\"Users\">Users" +
			"   <go href=\"" + request.getRequestURI() + jsessionID + "#userstats\"/>" +
			"  </anchor>" +
			"  <do type=\"accept\" label=\"Votes\" name=\"1\">" +
			"   <go href=\"" + request.getRequestURI() + jsessionID + "#votestats\"/>" +
			"  </do>" +
			"  <do type=\"accept\" label=\"Users\" name=\"2\">" +
			"   <go href=\"" + request.getRequestURI() + jsessionID + "#userstats\"/>" +
			"  </do>" +
			" </p>" +
			"</card>");
	    out.println("<card title=\"Vote statistics\" id=\"votestats\"><p>");
	    out.println(Feedback.viewVotes());
	    out.println("</p></card>");
	    out.println("<card title=\"User statistics\" id=\"userstats\">" +
			"<p>" + viewUsers() +
			"</p></card>");
	}
	out.println("</wml>");
    }


    /**
     * <code>viewUsers</code> views the number of users (males and females).
     *
     * @return a <code>String</code> value
     */
    private static String viewUsers() {
	int numberOfUsers = 0;
	double numberOfMales = 0;
	Statement stmt = Members.getStatement();

	try {
	    ResultSet rs = stmt.executeQuery("SELECT sex FROM members");
	    while (rs.next()) {
		++numberOfUsers;
		if (rs.getString("sex").equals("m")) ++numberOfMales;
	    }
	}
	catch (SQLException E){
	    E.printStackTrace();
	}
	if(numberOfUsers == 0)
	    return "No users";
	else
	    return "Users: " + numberOfUsers + "<br/>Male: " + Math.round(numberOfMales / (double)numberOfUsers * 100) + "%" 
		+ "<br/>Female: " + Math.round(((double)numberOfUsers - numberOfMales) / (double)numberOfUsers * 100) + "%";
    }

    /**
     * Calculates the current age on the basis of date of birth (dob) given in format "yyyy.mm.dd"
     *
     * @param dob a <code>String</code> value
     * @return an <code>int</code> value
     */
    public static int ageCalculator(String dob) {
	SimpleDateFormat s = new SimpleDateFormat("yyyy.MM.dd");
	try {
	    java.util.Date d = s.parse(dob);
	    Calendar c = Calendar.getInstance();
	    c.setTime(d);
	    return Calendar.getInstance().get(Calendar.YEAR) - c.get(Calendar.YEAR);
	}
	catch(Exception e) { System.err.println(e); }
	return -1;
    }

    /** 
     *  Check if the client phone supports wtai functionality.
     *  The user-agent header information is utilised.
     */
    private boolean wtaiSupported(HttpServletRequest request) {
	String wtaiSupportFile = getInitParameter("wtaisupport");
	String userAgent = request.getHeader("User-Agent");
	if(userAgent == null) return false;
	userAgent = userAgent.toLowerCase();
	wtaiSupportFile = getServletContext().getRealPath(wtaiSupportFile);
	try {
	    BufferedReader reader = new BufferedReader(new FileReader(wtaiSupportFile));
	    String line;
	    while((line = reader.readLine()) != null) {
		line = line.trim().toLowerCase();
		if(line.equals(""))  break;
		if(userAgent.startsWith(line)) return true;
	    }
	}
	catch (java.io.IOException e) {
	    System.err.println(e);
	}
	return false;
    }
}