// THIS VERSION IS FOR DEMO ONLY, NOT THE ONE I USE.
/** *****************************************************************
loginDemo.java SWE 432 Student Information
@author Jeff Offutt
@version 1.0 (2/21/2004)
@version 1.1 (8/24/2007)
Upsorn Praphamontripong
Update variables to run on Hermes (apps-it821.ite.gmu.edu)
Establishes a login using a servlet session.
IDs are hardcoded.
doGet() prints the login screen.
doPost() checks an ID/password and sets the session info.
*********************************************************************
INSTALLATION INSTRUCTIONS
1) Modify StudInfoSysDemo.java (Changes marked there)
2) Modify loginDemo.java
Change the following global variables:
private static String LoginServlet = "http://ise.gmu.edu:8080/offutt/servlet/StudInfoDemo.loginDemo"; // ise
private static String JSPLoc = "http://ise.gmu.edu:8080/offutt/jsp/"; // ise
public static String classWebSiteURL = "http://www.ise.gmu.edu/~offutt/classes/Demo/";
public static String FileName = "/home/faculty/ofut/public_html/DATA/Demo-info-S06.xml"; // ise
Also change the hard-coded passwords (feel free to laugh) in doPost():
if ((demoUserID.equals ("xxx") && demoPassWord.equals ("xxx"))
|| (demoUserID.equals ("xxx") && demoPassWord.equals ("xxx")) )
2) Compille .java classes
3) Move .class files to ~/j2ee/servlets/StudInfoDemo
4) Copy .jsp files to ~/j2ee/jsp
5) URL: http://ise.gmu.edu:8080/offutt/servlet/StudInfoDemo.StudInfoSysDemo
********************************************************************* */
package StudInfoDemo;
// Import Servlet Libraries
import javax.servlet.*;
import javax.servlet.http.*;
// Import Java Libraries
import java.io.*;
import java.util.*;
import java.lang.*;
// login class
//
//***********************************************************************
public class loginDemo extends HttpServlet
{
private static String LoginServlet = "http://apps-inst.ite.gmu.edu:8080/swe432/servlet/StudInfoDemo.loginDemo"; // Hermes
private static String JSPLoc = "http://apps-inst.ite.gmu.edu:8080/swe432/jsp/StudInfoDemo/";
public static String classWebSiteURL = "http://www.ise.gmu.edu/~offutt/classes/432/";
public static String FileName = "/apps/tomcat/swe432/WEB-INF/data/Demo-info-F07.xml";
// Form parameters.
private static String demoUserID;
private static String demoPassWord;
// doPost() tells doGet() when the login is invalid.
private static boolean invalidID = false;
private static String fromJSP;
/** *****************************************************
* Overrides HttpServlet's doGet().
* prints the login form.
********************************************************* */
public void doGet (HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException
{
fromJSP = req.getParameter ("jspFrom");
res.setContentType ("TEXT/HTML");
PrintWriter out = res.getWriter ();
out.println ("");
out.println ("");
out.println ("");
out.println (" SWE 432-Demo Information Form");
out.println ("");
out.println ("");
out.println ("");
out.println ("Login form to the student information system");
if (invalidID)
{ // called from doPost(), invalid ID entered.
invalidID = false;
out.println ("
Invalid user ID, password pair. Please try again.
");
}
out.println ("");
// Put the initial focus in the user id box.
out.println (" ");
out.println ("");
out.println ("");
out.close ();
}
/** *****************************************************
* Overrides HttpServlet's doPost().
********************************************************* */
public void doPost (HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException
{
demoUserID = req.getParameter ("demoUserID");
demoPassWord = req.getParameter ("demoPassWord");
fromJSP = req.getParameter ("jspFrom");
HttpSession session = req.getSession (true);
if ((demoUserID.equals ("swe432") && demoPassWord.equals ("swe432"))
|| (demoUserID.equals ("offutt") && demoPassWord.equals ("offutt")) )
{ // successful
session.setAttribute ("isLogin", "Yes");
session.setAttribute ("demoUserID", demoUserID);
// OKAY ... MAYBE FORWARD TO JSP from "fromJSP"
res.sendRedirect (JSPLoc + fromJSP);
//res.sendRedirect (JSPLoc + "infoDemo.jsp");
}
else
{ // unsuccessful
session.setAttribute ("isLogin", "No");
session.setAttribute ("demoUserID", "");
invalidID = true;
doGet (req, res);
}
} // end of doPost() method
} // end of loginDemo class