logout.logout_servlet.java Source code

Introduction

Here is the source code for logout.logout_servlet.java

Source

package logout;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

import db.ConnectionManager;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.text.*;
import java.util.*;
import java.sql.*;
import org.json.simple.JSONObject;

/**
 *
 * @author Scarletta's
 */
@WebServlet(urlPatterns = { "/logout_servlet" })
public class logout_servlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String token = request.getParameter("access_token");
        Connection currentCon = null;
        JSONObject arrayObj = new JSONObject();
        String query = "DELETE FROM tokendata WHERE token ='" + token + "'";

        try {
            //connect to database
            currentCon = ConnectionManager.getConnection();
            PreparedStatement ps = currentCon.prepareStatement(query);
            int i = ps.executeUpdate();
            arrayObj.put("status", "ok");
            System.out.println("DELETE TOKEN");

        }

        catch (Exception ex) {
            System.out.println("Log out failed: An Exception has occurred! " + ex);
        }

        finally {
            if (currentCon != null) {
                try {
                    currentCon.close();
                } catch (Exception e) {
                }
                currentCon = null;
            }
        }
        response.setContentType("application/json:charset=UTF-8");
        response.getWriter().write(arrayObj.toString());
    }

}