Package servlet

Class LoginServlet

java.lang.Object
javax.servlet.GenericServlet
javax.servlet.http.HttpServlet
servlet.LoginServlet
All Implemented Interfaces:
Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig
@WebServlet("/login") public class LoginServlet extends javax.servlet.http.HttpServlet
Servlet that handles user authentication and login process. Implements two factor authentication with password verification and OTP. Redirects users to appropriate pages based on their roles.
Author:
TAMIL MUGHILAN
See Also:

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private AuthenticationService
    authService
     
    private DataStorage
    dataStorage
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    LoginServlet()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    protected void
    doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
    Handles GET requests by redirecting to login page.
    protected void
    doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
    Handles POST requests for login and OTP verification.
    private void
    handleLogin(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
    Handles the initial login attempt with email and password.
    private void
    handleOTPVerification(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
    Handles OTP verification and completes the login process.
    void
    init()
    Initializes the servlet with database storage and authentication service.

    Methods inherited from class javax.servlet.http.HttpServlet

    doDelete, doHead, doOptions, doPut, doTrace, getLastModified, service, service

    Methods inherited from class javax.servlet.GenericServlet

    destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

  • Constructor Details

    • LoginServlet

      public LoginServlet()

  • Method Details

    • init

      public void init() throws javax.servlet.ServletException
      Initializes the servlet with database storage and authentication service.
      Overrides:
      init in class javax.servlet.GenericServlet
      Throws:
      javax.servlet.ServletException - if initialization fails

    • doGet

      protected void doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException
      Handles GET requests by redirecting to login page.
      Overrides:
      doGet in class javax.servlet.http.HttpServlet
      Parameters:
      request - the HTTP servlet request
      response - the HTTP servlet response
      Throws:
      javax.servlet.ServletException - if a servlet error occurs
      IOException - if an I/O error occurs

    • doPost

      protected void doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException
      Handles POST requests for login and OTP verification. Routes to appropriate handler based on action parameter.
      Overrides:
      doPost in class javax.servlet.http.HttpServlet
      Parameters:
      request - the HTTP servlet request
      response - the HTTP servlet response
      Throws:
      javax.servlet.ServletException - if a servlet error occurs
      IOException - if an I/O error occurs

    • handleLogin

      private void handleLogin(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException
      Handles the initial login attempt with email and password. Generates OTP if credentials are valid.
      Parameters:
      request - the HTTP servlet request
      response - the HTTP servlet response
      Throws:
      javax.servlet.ServletException - if a servlet error occurs
      IOException - if an I/O error occurs

    • handleOTPVerification

      private void handleOTPVerification(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException
      Handles OTP verification and completes the login process. Creates user session and redirects based on role.
      Parameters:
      request - the HTTP servlet request
      response - the HTTP servlet response
      Throws:
      javax.servlet.ServletException - if a servlet error occurs
      IOException - if an I/O error occurs