package com.evs.objava33.class17;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class LoginServlet
*/
@WebServlet("/LoginServlet")
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private String message = null;
/*
* (non-Javadoc)
*
* @see javax.servlet.GenericServlet#init(javax.servlet.ServletConfig)
*/
@Override
public void init(ServletConfig config) throws ServletException {
// TODO Auto-generated method stub
super.init(config);
String paramValue = getInitParameter("init-param-name");
String contextParam = getServletContext().getInitParameter(
"context-param");
}
/**
* @see HttpServlet#HttpServlet()
*/
public LoginServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
if (request.getParameter("error") != null) {
message = "Please login first ... ";
}
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=ISO-8859-1\">");
out.println("<title>My Application :: Login Page</title>");
out.println("</head>");
out.println("<body>");
if (message != null) {
out.println("<font color=RED>" + message + "</font>");
message = null;
}
out.println("<form action=\"LoginServlet\" method=\"POST\">");
out.println("Login: <input type=\"text\" name=\"txtLogin\" /> <br />");
out.println("Password: <input type=\"password\" name=\"txtPass\" /> <br />");
out.println("<input type=\"submit\" name=\"btnSubmit\" value=\"Login\" /> ");
out.println("<input type=\"reset\" name=\"btnReset\" value=\"Cancel\" />");
out.println("</form>");
out.println("</body>");
out.println("</html>");
out.close();
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
String loginName = request.getParameter("txtLogin");
String loginPass = request.getParameter("txtPass");
if (null != loginName && null != loginPass
&& loginName.trim().length() > 0
&& loginPass.trim().length() > 0) {
if ("admin".equals(loginName) && "admin".equals(loginPass)) {
// Success; Validated user
request.getSession().setAttribute("user", loginName);
response.sendRedirect("HomeServlet");
return;
} else {
message = "Invalid combination";
}
} else {
message = "Please provide username & password ";
}
// Failure
doGet(request, response);
}
}
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