Java tutorial
/* * 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. */ package adminservlets_Json; import classes.AdminClass_BlacklistedEmails; import classes.AdminClass_Links; import classes.AdminClass_SendMail; import com.google.gson.Gson; import com.google.gson.JsonObject; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * * @author SithuDewmi */ public class UserBlacklistJson 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 */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.sendError(HttpServletResponse.SC_NOT_FOUND); } // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code."> /** * Handles the HTTP <code>GET</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 doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * 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 { AdminClass_BlacklistedEmails ab = new AdminClass_BlacklistedEmails(); AdminClass_SendMail as = new AdminClass_SendMail(); AdminClass_Links al = new AdminClass_Links(); String alert = null; if (request.getParameter("email_unblock") != null) { //checking blacklist action boolean exists = ab.getEnteredEmail(request.getParameter("email_unblock"));//checking exsistence if (exists == true) { int result = ab.unblockEmail(request.getParameter("email_unblock"));//unblacklist an email if (result == 1) { //returning notification of the success alert = "<button class=\"btn btn-green\"><i class=\"" + "glyphicon glyphicon-ok-sign\"></i></button><br><strong>" + "Unblocked !</strong> Email- " + request.getParameter("email_unblock") + ""; } else { alert = "<button class=\"btn btn-red\">" //returning notification of the failure + "<i class=\"glyphicon glyphicon-remove-circle\"></i></button><br><strong>" + "Failed !</strong> Email- " + request.getParameter("email_unblock") + ""; } } else { //returning notification of the failure alert = "<button class=\"btn btn-red\"><i class=\"" + "glyphicon glyphicon-remove-circle\"></i></button><br><strong>" + "Failed !</strong> Email- " + request.getParameter("email_unblock") + " " + "Does not exsist in the list"; } } else if (request.getParameter("email_block") != null) { //checking if the email is null boolean exists = ab.getEnteredEmail(request.getParameter("email_block"));//checking if the email is already blacklisted if (exists == true) { //returning notification of the failure alert = "<button class=\"btn btn-red\"><i class=\"" + "glyphicon glyphicon-remove-circle\"></i></button><br><strong>" + "Failed !</strong> Email- " + request.getParameter("email_block") + " " + "is already blacklisted"; } else { boolean exsist = ab.checkUserEmail(request.getParameter("email_block")); //check for current user if (exsist == true) { ab.RemoveUser(request.getParameter("email_block")); //remove current user content } int result = ab.blockEmail(request.getParameter("email_block")); //blacklisting an email String subject = "About temporarily disabeling your account"; String content = "Your account in Superb.lk is temporarily disabled due to invalid activity or policy violations.\n\n" + "Visit the link for common reasons and policy violations cause accounts to be suspended.\n"; String link = "<a href='" + al.getPolicies() + "' target='blank'><p>Click here to view our privacy ploicies</p></a>"; int mail_result = as.mailClass(request.getParameter("email_block"), subject, content, link);//sending mail to the user if (result == 1) { //returning notification of the success alert = "<button class=\"btn btn-green\"><i class=\"" + "glyphicon glyphicon-ok-sign\"></i></button><br><strong>" + "Blocked !</strong> Email- " + request.getParameter("email_block") + ""; } else { alert = "<button class=\"btn btn-red\"><i class=\"" + "glyphicon glyphicon-remove-circle\"></i></button><br><strong>" + "Failed !</strong> Email- " + request.getParameter("email_block") + ""; } } } PrintWriter out = response.getWriter(); Gson gson = new Gson(); JsonObject myObj = new JsonObject(); myObj.addProperty("result", alert); out.write(myObj.toString()); out.close(); } /** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() { return "Short description"; }// </editor-fold> }