fjp.java

FreeJaPoll is a free software that make possible to add in a simple way a web-survey to your own s

/**
 *  <p> Title: FreeJaPoll -Free Java Poll-</p>
 *  <p> Description: Servlet that make simple adding a web survey based on Java Technology on your site </p>
 *  <p>Copyright: Copyright(c) 2002; </p>
 *  This file is part of FreeJaPoll.

    FreeJaPoll is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    any later version.

    FreeJaPoll 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 General Public License for more details.

    You have received a copy of the GNU General Public License
    along with FreeJaPoll
 *  @author nkanter  e-mail: [e-mail]
 *  @version 1.0
 */

package org.pensieroacromatico.freejapoll;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.util.StringTokenizer;
import java.util.ResourceBundle;
import java.util.GregorianCalendar;
import java.text.DateFormat;




public class FJP extends HttpServlet {
  static ResourceBundle res1 = ResourceBundle.getBundle("org.pensieroacromatico.freejapoll.Res");
  private static final String CONTENT_TYPE = "text/html";
  private static int[] arrayValori =new int[10];
  private static int totale;
  private int numberOfChoice;
  private String choose, pageTitle, resultTitle, backGroundColor, textColor, tableColor, tableBorderColor, returnString, returnLink;
  private String imageBar, imageBarEnd, footer, header, headerLink, footerLink, noTerrorist, noTerroristPage;
  private final String DBFILE = res1.getString("tmp_initDb_nk");
  private final String HOSTCOOKIE="www.pensieroacromatico.org";
  private final String VOTATO="votato";
  private final String IPLOG = "YOUR_ROOT_PATH/iplogs.nk";
  private String[] labelChoose = new String[10];
  private final String[] labelChooseParam ={"LabelChoose1", "LabelChoose2", "LabelChoose3", "LabelChoose4", "LabelChoose5", "LabelChoose6", "LabelChoose7", "LabelChoose8", "LabelChoose9", "LabelChoose10"};
  private String temp, temp2;


  /** Servlet init method; it checks if exists the DBFILE and if there are some data stored in it.
  *   @throws ServletException
  */
  public void init() throws ServletException {
    caricaDati();
  }



  /**Process the HTTP Get request; here are set the parameters before producing the
   * html file.
   * @param request
   * @param response
   * @throws ServletException
   * @throws IOException
   */
  public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    response.setContentType(CONTENT_TYPE);
    PrintWriter out = response.getWriter();
    settaParametri(request);
    caricaDati();
    scriviHTML(out);
  }



  /**Process the HTTP Post request; here are set the parameters; then a control check
   * the "noTerrorist" option (if the flag is "Yes"); an additional control check the ip of
   * the remote user and the cookie on his machine, in order to make impossible to vote more than once
   * in a three-day period. Then, if voting is allowed, a new vote is added, the user is registered
   * (logging his ip and setting a cookie on his machine) and the html file is produced.
   * @param request
   * @param response
   * @throws ServletException
   * @throws IOException
   */
  public synchronized  void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    response.setContentType(CONTENT_TYPE);
    PrintWriter out = response.getWriter();
    settaParametri(request);
    if(!controllaTerrorista(request)){
      if(controllaCookie(request) && controllaIP(request)){
        choose = request.getParameter("Choose");
        caricaDati();
        vota(choose);
        response.addCookie(aggiungiCookie());
        aggiungiIP(request);
        scriviHTML(out);
      }
      else
        response.sendRedirect(res1.getString("_html_novote_htm"));
    }
    else
      response.sendRedirect(this.noTerroristPage);

  }



  /**
   * Destroy servlet method; it saves data on the default file.
   */
  public void destroy() {
    super.destroy();
    salvaDati();
  }


  /**
   * This method check wich option is selected and add the new value to the respective
   * variabile; after that it saves data on the default file.
   * @param s The survey's option value chosen by the user
   */
  private synchronized void vota(String s){
    if(choose.compareToIgnoreCase(res1.getString("Uno"))==0)
      arrayValori[0]+=1;
    else if(choose.compareToIgnoreCase(res1.getString("Due"))==0)
      arrayValori[1]+=1;
    else if(choose.compareToIgnoreCase(res1.getString("Tre"))==0)
      arrayValori[2]+=1;
    else if(choose.compareToIgnoreCase(res1.getString("Quattro"))==0)
      arrayValori[3]+=1;
    else if(choose.compareToIgnoreCase(res1.getString("Cinque"))==0)
      arrayValori[4]+=1;
    else if(choose.compareToIgnoreCase(res1.getString("Sei"))==0)
      arrayValori[5]+=1;
    else if(choose.compareToIgnoreCase(res1.getString("Sette"))==0)
      arrayValori[6]+=1;
    else if(choose.compareToIgnoreCase(res1.getString("Otto"))==0)
      arrayValori[7]+=1;
    else if(choose.compareToIgnoreCase(res1.getString("Nove"))==0)
      arrayValori[8]+=1;
    else if(choose.compareToIgnoreCase(res1.getString("Dieci"))==0)
      arrayValori[9]+=1;
    totale++;
    salvaDati();
  }


  /**
   * Method that sets all the parameters(taking them from the resource bundle and from
   * the html file).
   * @param req
   */
  private void settaParametri(HttpServletRequest req){
    this.pageTitle = res1.getString("Crew_Del_Pensiero");
    this.resultTitle = res1.getString("_Logo_Contest_2K2");
    this.backGroundColor = res1.getString("_999999");
    this.textColor = res1.getString("_000000");
    this.tableColor = res1.getString("_CCCCCC");
    this.tableBorderColor = res1.getString("_000000");
    this.returnString = res1.getString("Ritorna_a_Logo");
    this.returnLink = res1.getString("_x_html");
    this.numberOfChoice = Integer.parseInt(req.getParameter(res1.getString("NumberOfChoice")));
    for(int i=0;i<numberOfChoice;i++){
      labelChoose[i]=req.getParameter(labelChooseParam[i]);
    }
    this.footer =res1.getString("footer");
    this.header = res1.getString("header");
    if(header.compareToIgnoreCase("Yes")==0)
      this.headerLink = "";
    else
      this.headerLink = null;
    if(footer.compareToIgnoreCase("Yes")==0)
      this.footerLink = "";
    else
      this.footerLink = null;
    this.imageBar = res1.getString("_immagini_graficoBase");
    this.imageBarEnd = res1.getString("_immagini");
    this.noTerrorist = res1.getString("noTerrorist");
    if(this.noTerrorist.equalsIgnoreCase("Yes"))
      this.noTerroristPage = res1.getString("_noTerroristVote_htm");
  }


  /**
   * Method used to compute the length of the image bar to be displayed for each
   * option in the resulting html file.
   * @param i The value of an option (current amount of votes for this option)
   * @return The length in pixel of the image bar to be displayed
   */
  private int calcolaMoltiplicatorePercentuale(int i){
    int u = i;
    if(totale!=0)
      u *= (440/totale);
    return u;
  }



  /**
   * Method that saves all data in the default file.
   */
  private synchronized void salvaDati(){
    File f = new File(DBFILE);
    /*try{
      f.createNewFile();
    }
    catch(IOException e){
      temp = e.toString();
    }*/
    FileWriter fileWriter = null;
    PrintWriter printWriter = null;
    try{
      fileWriter = new FileWriter(f);
      printWriter = new PrintWriter(fileWriter);
      printWriter.println(totale);
      for(int i=0;i<arrayValori.length;i++){
        printWriter.println(arrayValori[i]);
      }
    }
    catch(IOException e){
      System.err.println("Error While writing file .nk");
      temp = e.toString();
    }
    catch(Exception e){
      temp = e.toString();
    }
    if(printWriter!=null)
      printWriter.close();
  }


  /**
   * This method loads data from the dbfile
   */
  private synchronized void caricaDati(){
    FileReader fileReader =null;
    BufferedReader bufferedReader = null;
    try{
      fileReader = new FileReader(DBFILE);
      bufferedReader = new BufferedReader(fileReader);
      String dati = bufferedReader.readLine();
      if(dati!=null && dati!="")
        totale = Integer.parseInt(dati);
      int i=0;
      dati = bufferedReader.readLine();
      while (dati!=null){
        arrayValori[i] = Integer.parseInt(dati);
        i++;
        dati = bufferedReader.readLine();
      }
    }