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Wednesday, December 14, 2011

Custom login interceptor


The login in a struts page needs a proper interceptor to handle all possible cases of login... Have tried to make one that works :)


package com.interceptor;


import java.util.List;


import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


import org.apache.commons.lang.xwork.StringUtils;
import org.apache.struts2.StrutsStatics;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;






import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
import com.user.User_Info;


public class LoginInterceptor extends AbstractInterceptor implements StrutsStatics
{


private static final long serialVersionUID = 1L;
HttpSession session;
HttpServletRequest request;
HttpServletResponse response;
String t;

@Override
public String intercept(ActionInvocation actin) throws Exception
{
//System.out.println("call interceptor");
ActionContext ctx=actin.getInvocationContext();
request=(HttpServletRequest)ctx.get(HTTP_REQUEST) ;
response=(HttpServletResponse) ctx.get(HTTP_RESPONSE);
session =  request.getSession (true);
Object user = session.getAttribute ("user");
   if (user == null)
   {
    //System.out.println("inside near user=null");
    String trylog = request.getParameter("user");
       if (! StringUtils.isBlank (trylog) )
       {
        //System.out.println("try");
        String usern=request.getParameter("user").toString();
   
        String pass=request.getParameter("pass").toString();
        SessionFactory sf=new Configuration().configure("hibernate.cfg.xml").buildSessionFactory();
        Session ses= sf.openSession();
        //System.out.println("enter id");
        User_Info u=new User_Info();
        try
        {
        List l = ses.createQuery("select password from com.user.User_Info e where e.user_id="+"'"+usern+"'").list();
        for(Object o:l)
        {
        t=(String) o;
       
        }


        }
        catch (HibernateException e)
        {
        e.printStackTrace();
        }
        if(pass.equals(t.toString()))
        {
        //System.out.println("ho gaya");
        session.setAttribute("user", usern);
        //request.setAttribute("page", "dummy.jsp");//Following line of code is for a concern of a project for using a master page to include other pages by calling the page required to be included from session
        return "success";
        }
        /*else
        {
        System.out.println("cookie");
        Cookie c[]=request.getCookies();
        if(c==null)
{
       
        int counter = 1;
        Cookie cnt = new Cookie("count",new Integer(counter).toString());
        cnt.setMaxAge(65000);
        System.out.println(cnt);
        response.addCookie(cnt);
        }
        else
{
        for(int i=0;i<c.length;i++)
{
        if(c[i].getName().equals("count"))
        {
        int count = Integer.parseInt(c[i].getValue());
         if(count<3)
 {
          count++;
          //System.out.println("now="+count);
          c[i].setValue(new Integer(count).toString());
          response.addCookie(c[i]);
          return "login";
         }
         else
         {
         count++;
         c[i].setValue(new Integer(count).toString());
         response.addCookie(c[i]);
 return "change";
         }
        }
        }
}
       
     
        ses.close();
        System.out.println(u);
        }*/
    return "login";
       
       }


       else
{
           
         Object action = actin.getAction ();
     if (action instanceof com.opensymphony.xwork2.ValidationAware)
 {
    ((com.opensymphony.xwork2.ValidationAware) action).addActionError ("Username / password / code incorrect!");
     }
   
       }
       return "login";
   }
else
    {
    return actin.invoke();
    }
    }
}
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