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# 8  
Old 09-03-2010
Quote:
Originally Posted by kevintse
I don't see anything wrong in your code, it should have worked.

Well, what errors did you get when it didn't redirect you to "cgipage.jsp"? did all your code compile fine?

I guess it might be that you were redirected to the expected page, but there're some errors in your "cgipage.jsp" page. I don't know...

You may check log messages under $TOMCAT_HOME/logs, and make sure your code compile.
I dont get any error message but even if i put the right credentials to login,the same page comes again (i.e login.jsp).

following log get generated under $TOMCAT_HOME/logs/catalina.out

Code:
# tail -f catalina.out
INFO: JK: ajp13 listening on /0.0.0.0:8009
Sep 1, 2010 10:51:30 AM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/259  config=null
Sep 1, 2010 10:51:30 AM org.apache.catalina.storeconfig.StoreLoader load
INFO: Find registry server-registry.xml at classpath resource
Sep 1, 2010 10:51:30 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 25153 ms
null
oracle.jdbc.driver.OracleDriver
oracle.jdbc.driver.OracleDriver


oracle.jdbc.driver.OracleDriver

everytime i refresh the page an entry "oracle.jdbc.driver.OracleDriver" is written to the log.
However if i use the old path i.e.The UNIX and Linux Forums - Learn UNIX and Linux from Experts
things works fine and i get redirected to cgipage.jsp.There fore i think there should not be a problem in cgipage.jsp page.Anyway i m posting the code for cgipage.jsp as well.
Code:
<%@ page import="java.lang.*" language="java"%>
<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>

<%
  Object user = session.getAttribute("user");
  Object fullname =session.getAttribute("fullname");
  Object role=session.getAttribute("role");
  String Str_startstop="no";
  if (null == user) {
    response.sendRedirect("login.jsp");
  }
  try
{
//Triming Username and Password
         Object  usernameobj   = session.getAttribute("user");

         String username=usernameobj.toString();

         Connection conn=null;
         Statement stmt=null;
         ResultSet rs=null;
         String startstoprole =  null;
         Class.forName ("oracle.jdbc.driver.OracleDriver");
         conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE", "lightweight", "oracle");
                            // @machineName:port:SID,   userid,  password
        String sql = "select * from LIGHT_ROLE where USERNAME='"+username+"'";
        stmt = conn.createStatement();
        rs = stmt.executeQuery(sql);
        while( rs.next() )
        {
         //Getting Username,Password,roll,Fullname from Database.
         startstoprole=rs.getString("PERMISSION");
        }

        if(startstoprole.equals("yes"))
        {
        session.setAttribute("startstoprole","yes");
        }
        else
        {
        session.setAttribute("startstoprole","no");
        }
Object startstoproleobj =session.getAttribute("startstoprole");
Str_startstop=startstoproleobj.toString();
}
catch(Exception e)
{
out.println(e.getMessage());
}


%>

<html>
<head>
<title>Light Weight Manager</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>

<b>Hi,</b> <%=fullname%>

<!-- Serch Virtual Guest Form -->
<FORM NAME="SEARCHVIRTUALGUEST" METHOD="GET" ACTION="http://localhost:8080/VM_Finder_V3.cgi">
<hr size=2 noshade>
  Enter VM Host Name(ALL IN CAP):
<%
try
{
if (role.equals("user"))
{
        Connection conn=null;
        Statement stmt=null;
        ResultSet rs=null;
        Class.forName ("oracle.jdbc.driver.OracleDriver");
        conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE", "lightweight", "oracle");
                            // @machineName:port:SID,   userid,  password

        String sql = "select * from LIGHT_INVENTORY where USERNAME='"+user+"'";
        stmt = conn.createStatement();
        rs = stmt.executeQuery(sql);%>
        <select name="mc" size="1"><%
        while( rs.next() )
        {
 {
        String host=rs.getString(2);%>
        <option value="<%=host%>"><%=host%></option>

       <% }%>

        </select>
<INPUT TYPE="submit">

</FORM>
<%
rs.close();
stmt.close();
conn.close();
}
else
{
%>
<INPUT TYPE="text" NAME="mc">
<INPUT TYPE="submit">
</FORM>
<!-- End of Serch Virtual Guest Form -->

<%}
}
catch(Exception e)
{
}
%>


<%
if(Str_startstop.equals("yes"))
{
%>
<FORM name="form4" METHOD="GET" ACTION="http://localhost:8080/vm_start_V1.cgi">
Please Type VM Host Name(ALL IN CAP): <INPUT TYPE="text" NAME="machine">
<input type="submit" name="Submit" value="Power On"> </FORM>

<FORM name="form3" METHOD="GET" ACTION="http://localhost:8080/VM_Stop_V2.cgi">
Please Type VM Host Name(ALL IN CAP): <INPUT TYPE="text" NAME="machine">
<input type="submit" name="Submit" value="Power Off">
</FORM>
<%
}
%>

<form name=logout action=logout.jsp method=post>
<input type=submit value="LogOut">
</form>

</body>
</html>

# 9  
Old 09-03-2010
At the very first part of your "cgipage.jsp" page, I see this code:
Code:
Object user = session.getAttribute("user");
....
if (null == user) {
    response.sendRedirect("login.jsp");
  }

I guess this is the problem, "user" may not be set in session for some reasons and it is null, so you are redirected back to "login.jsp" as the code does.

I hope you would have solved your problem before seeing this reply, it shouldn't difficult.
# 10  
Old 09-03-2010
Quote:
Originally Posted by kevintse
At the very first part of your "cgipage.jsp" page, I see this code:
Code:
Object user = session.getAttribute("user");
....
if (null == user) {
    response.sendRedirect("login.jsp");
  }

I guess this is the problem, "user" may not be set in session for some reasons and it is null, so you are redirected back to "login.jsp" as the code does.

I hope you would have solved your problem before seeing this reply, it shouldn't difficult.
As i mentioned in my earlier post .The same page when loaded with an old URL things works pretty well.But after the configuration changes to load it from The UNIX and Linux Forums - Learn UNIX and Linux from Experts ,Problem seems to occure.

In both the cases cgipage.jsp is the same .

As per login page after a successful login i m setting a session variable .
Code:
if(trim_Username.equals(id) && trim_Password.equals(pin))
        {
 out.println("login successful");
        session.setAttribute("user",trim_Username);
        session.setAttribute("fullname",fullname);
        session.setAttribute("role",role);
        response.sendRedirect("cgipage.jsp");
        }

Last edited by pinga123; 09-03-2010 at 08:52 AM..
# 11  
Old 09-03-2010
OK, seems weird...
So you have to do some tests and see whether you were ever redirected to "cgipage.jsp" and redirected back to "login.jsp" for some reasons.
Add the following to your "cgipage.jsp" page, and see whether there are something printed to the console or logged in "$TOMCAT_HOME/logs/catalina.out", or there are something but it is a "null"...you know what's the problem:
Code:
<% System.out.println(session.getAttribute("user")); %>

You may also want to add some "System.out.println()"s to "login.jsp" and see how many times it has been accessed after you press the "login" button.

This is the help I can offer for the moment.

PS: Logging message to the jvm console using System.out.println() is always discouraged in production code, but it can be useful when troubleshooting.
# 12  
Old 09-06-2010
Quote:
Originally Posted by kevintse
OK, seems weird...
So you have to do some tests and see whether you were ever redirected to "cgipage.jsp" and redirected back to "login.jsp" for some reasons.
Add the following to your "cgipage.jsp" page, and see whether there are something printed to the console or logged in "$TOMCAT_HOME/logs/catalina.out", or there are something but it is a "null"...you know what's the problem:
Code:
<% System.out.println(session.getAttribute("user")); %>

You may also want to add some "System.out.println()"s to "login.jsp" and see how many times it has been accessed after you press the "login" button.

This is the help I can offer for the moment.

PS: Logging message to the jvm console using System.out.println() is always discouraged in production code, but it can be useful when troubleshooting.
I dont get any error message but even if i put the right credentials to login,the same page comes again (i.e login.jsp).

following log get generated under $TOMCAT_HOME/logs/catalina.out


Code:
Code:
# tail -f catalina.out
INFO: JK: ajp13 listening on /0.0.0.0:8009
Sep 1, 2010 10:51:30 AM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/259  config=null
Sep 1, 2010 10:51:30 AM org.apache.catalina.storeconfig.StoreLoader load
INFO: Find registry server-registry.xml at classpath resource
Sep 1, 2010 10:51:30 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 25153 ms
null
oracle.jdbc.driver.OracleDriver
oracle.jdbc.driver.OracleDriver

everytime i refresh the page an entry "oracle.jdbc.driver.OracleDriver" is written to the log.

---------- Post updated at 10:37 PM ---------- Previous update was at 10:37 PM ----------
Quote:
Originally Posted by pinga123
I dont get any error message but even if i put the right credentials to login,the same page comes again (i.e login.jsp).

following log get generated under $TOMCAT_HOME/logs/catalina.out


Code:
Code:
# tail -f catalina.out
INFO: JK: ajp13 listening on /0.0.0.0:8009
Sep 1, 2010 10:51:30 AM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/259  config=null
Sep 1, 2010 10:51:30 AM org.apache.catalina.storeconfig.StoreLoader load
INFO: Find registry server-registry.xml at classpath resource
Sep 1, 2010 10:51:30 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 25153 ms
null
oracle.jdbc.driver.OracleDriver
oracle.jdbc.driver.OracleDriver

everytime i refresh the page an entry "oracle.jdbc.driver.OracleDriver" is written to the log.
Do you think it has something to do with database?
# 13  
Old 09-06-2010
Quote:
Originally Posted by pinga123
Do you think it has something to do with database?
I don't think so, try logging and finding the cause in the log messages.

In your catalina.out, i spot a "null", what was that?
Code:
...
INFO: Server startup in 25153 ms
null
oracle.jdbc.driver.OracleDriver
...

# 14  
Old 09-06-2010
This happened when i supplied incorrect login name.
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