I am currently creating collaboartive learning website based on the social networking ideas.
I have a Java servlet that uses HttpSession to store data.
When one user, User-A, logs in and does something on the website, User-B logs in. When User-A navigates to another page, User-B's information is shown instead of User-A's.
My Java servlet:
Any help or advice would be great. I have been looking all over the web to get some sort of answer to this.
Thanks
I have a Java servlet that uses HttpSession to store data.
When one user, User-A, logs in and does something on the website, User-B logs in. When User-A navigates to another page, User-B's information is shown instead of User-A's.
My Java servlet:
Code:
package control;
import java.io.IOException;
import java.util.HashMap;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import model.InstructorUserBean;
import model.StudentUserBean;
/**
* Servlet controls the main interaction between the client and server
* @author Adam K Hagan
* @version v1
*/
public class Servlet extends HttpServlet {
// Instance variables
//A bean for the Logged in User
InstructorUserBean loggedInInstructorUser;
StudentUserBean loggedInStudentUser;
//ProfileManager
UserProfileManager profileManager;
//Manage login requests
LoginManager loginManager;
//Manage account creation
UserAccountCreator accountCreator;
// A session
HttpSession session;
// Hashmap stores data for processing
HashMap<String, String> userDetails;
/**
* Initialises all the variables
*/
public void init() {
userDetails = new HashMap<String, String>();
loggedInInstructorUser = new InstructorUserBean();
loggedInStudentUser = new StudentUserBean();
}
/**
* 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 {
// Stores the action using post or get
String action = request.getPathInfo();
// Stores the dispatcher - that directs to other pages
RequestDispatcher dispatcher = null;
//A session
session = request.getSession();
/* TEMPLATE FOR A SECTION
else if (action.equals("/action")) {
// Do something...
// Direct to page
dispatcher = this.getServletContext().getRequestDispatcher("webpage");
}
*/
/**
* Action to take if user logging in
*/
if (action.equals("/login")) {
// Get the user name and password from the request
String username = request.getParameter("email_login_input");
String password = request.getParameter("password_login_input");
//Create a LoginManager and check if the user is authentic
loginManager = new LoginManager(username, password);
//If the user is authentic, take to their dashboard
if (loginManager.isAuthenticUser()) {
//Log user in
loginUser(username, password);
// Authentic and user profile set up so direct to user's dashbaord
dispatcher = this.getServletContext().getRequestDispatcher("/webmods/dashboard/dashboard.jspx");
} // If not an authentic user, send user to error login page
else {
dispatcher = this.getServletContext().getRequestDispatcher("/webmods/login/errorLogin.jspx");
}
}
/**
* Go to sign in page
*/
else if (action.equals("/goSignIn")) {
dispatcher = this.getServletContext().getRequestDispatcher("/signin.jspx");
}
/**
* Action to take when signing up for an account: Stage 1
*/
else if (action.equals("/signUp")) {
// Gather signUp page information
String email = request.getParameter("inputEmail");
String firstName = request.getParameter("inputFirstName");
String lastName = request.getParameter("inputLastName");
String password = request.getParameter("inputPassword");
String type = request.getParameter("accountTypeInput");
userDetails.put("username", email);
userDetails.put("firstname", firstName);
userDetails.put("lastname", lastName);
userDetails.put("password", password);
userDetails.put("type", type);
if (type.equals("student")) {
dispatcher = this.getServletContext().getRequestDispatcher("/webmods/registration/accountRegistration_s.jspx");
}
if (type.equals("instructor")) {
dispatcher = this.getServletContext().getRequestDispatcher("/webmods/registration/accountRegistration_i.jspx");
}
}
/**
* Action for sign up Stage 2
*/
else if (action.equals("/accountStudentSetup")) {
// Gather account setup information
String courseName = request.getParameter("inputCourseName");
String courseYear = request.getParameter("inputCourseYear");
String privacySetting = request.getParameter("privacySetting");
userDetails.put("courseName", courseName);
userDetails.put("courseYear", courseYear);
userDetails.put("privacySetting", privacySetting);
dispatcher = this.getServletContext().getRequestDispatcher("/webmods/registration/profilePic.jspx");
} else if (action.equals("/accountInstructorSetup")) {
// Gather account setup information
String department = request.getParameter("inputDepartment");
String privacySetting = request.getParameter("privacySetting");
userDetails.put("department", department);
userDetails.put("privacySetting", privacySetting);
dispatcher = this.getServletContext().getRequestDispatcher("/webmods/registration/profilePic.jspx");
}
/**
* Action to take if registering with profile pic
* @TODO
*/
else if (action.equals("/profilePic")) {
// Do something...
// Direct to page
dispatcher = this.getServletContext().getRequestDispatcher("webpage");
}
/**
* Action to take if user skipped profile pic
*/
else if (action.equals("/completeRegistration")) {
boolean accountCreationVerified = false;
//Create useraccountcreator
if (userDetails.get("type").equals("student")) {
StudentUserAccountCreator sUAC = new StudentUserAccountCreator(userDetails);
//Create the account
sUAC.createUserAccount();
//Check the account has been created
accountCreationVerified = sUAC.isValidAccountCreated();
}
//Create useraccountcreator
if (userDetails.get("type").equals("instructor")) {
InstructorUserAccountCreator iUAC = new InstructorUserAccountCreator(userDetails);
//Create the account
iUAC.createUserAccount();
//Check the account has been created
accountCreationVerified = iUAC.isValidAccountCreated();
}
// If accountVerified go to dashboard else to login page
if (accountCreationVerified) {
loginUser(userDetails.get("username"),userDetails.get("password"));
dispatcher = this.getServletContext().getRequestDispatcher("/webmods/dashboard/dashboard.jspx");
} else {
dispatcher = this.getServletContext().getRequestDispatcher("/signin.jspx");
}
}
/**
* Action to take user to account settings page
*/
else if (action.equals("/goAccountSettings")) {
String type = (String) session.getAttribute("type");
//If student user go to student user page
if(type.equals("student")){
dispatcher = this.getServletContext().getRequestDispatcher("/webmods/accountsettings/accountSettings_s.jspx");
}
else if(type.equals("instructor")){
dispatcher = this.getServletContext().getRequestDispatcher("/webmods/accountsettings/accountSettings_i.jspx");
}
}
/**
* Action to take on updated account information
*/
else if (action.equals("/updateInstructorAccountSettings")) {
// Get input
String password = request.getParameter("inputPassword");
String department = request.getParameter("departmentInput");
String privacySetting = request.getParameter("privacySetting");
// Change data
InstructorUserProfileManager iUPM = (InstructorUserProfileManager) profileManager;
if(!((department == null) || (department.equals("")))){
iUPM.setDepartment(department);
}
iUPM.setPrivacySetting(privacySetting);
if(!((password == null) || (password.equals("")))){
iUPM.setPassword(password);
}
profileManager = iUPM;
//Update all details
String username = iUPM.getUsername();
loginUser(username,password);
dispatcher = this.getServletContext().getRequestDispatcher("/webmods/accountsettings/accountSettings_i.jspx");
}
/**
* Action to take on updated account information
*/
else if (action.equals("/updateStudentAccountSettings")) {
// Get input
String password = request.getParameter("inputPassword");
String course = request.getParameter("courseInput");
String year = request.getParameter("courseYearInput");
String privacySetting = request.getParameter("privacySetting");
// Change data
StudentUserProfileManager sUPM = (StudentUserProfileManager) profileManager;
if(!((course == null) || (course.equals("")))){
sUPM.setCourse(course);
}
sUPM.setCourseYear(year);
sUPM.setPrivacySetting(privacySetting);
if(!((password == null) || (password.equals("")))){
sUPM.setPassword(password);
}
profileManager = sUPM;
//Update all details
String username = sUPM.getUsername();
loginUser(username,password);
dispatcher = this.getServletContext().getRequestDispatcher("/webmods/accountsettings/accountSettings_s.jspx");
}
/**
* Action to take user to dashboard page
*/
else if (action.equals("/goDashboard")) {
dispatcher = this.getServletContext().getRequestDispatcher("/webmods/dashboard/dashboard.jspx");
}
// String enc = URLEncoder.encode("test", "UTF-8");
//Forward the request to the selected page
dispatcher.forward(request, response);
}
/**
* Gathers and creates objects to log a user in
* @param username
* @param password
*/
private void loginUser(String username, String password) {
//Create a LoginManager and check if the user is authentic
loginManager = new LoginManager(username, password);
if (loginManager.getUserType().equals("student")) {
StudentUserProfileManager studentProfileManager = new StudentUserProfileManager(username, password);
loggedInStudentUser.setUsername(username);
loggedInStudentUser.setPassword(password);
loggedInStudentUser.setName(studentProfileManager.getName());
loggedInStudentUser.setCourseYear(studentProfileManager.getCourseYear());
loggedInStudentUser.setCourseName(studentProfileManager.getCourseName());
loggedInStudentUser.setPrivacySetting(studentProfileManager.getPrivacySetting());
profileManager = studentProfileManager;
session.setAttribute("loggedInStudentUser",loggedInStudentUser);
session.setAttribute("type","student");
}
if (loginManager.getUserType().equals("instructor")){
InstructorUserProfileManager instructorProfileManager = new InstructorUserProfileManager(username, password);
loggedInInstructorUser.setUsername(username);
loggedInInstructorUser.setPassword(password);
loggedInInstructorUser.setName(instructorProfileManager.getName());
loggedInInstructorUser.setDepartment(instructorProfileManager.getDepartment());
loggedInInstructorUser.setPrivacySetting(instructorProfileManager.getPrivacySetting());
profileManager = instructorProfileManager;
session.setAttribute("loggedInInstructorUser",loggedInInstructorUser);
session.setAttribute("type","instructor");
}
}
// <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 {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
Thanks