Question : problem with wml and jsp

Ok, here is my problem.
First of all I try to browse a jsp page that gives wml from nokia browser and i get the famous "Server 500 error". I would guess that I have sth wrong with the code but the same page runs correctly under the gelon.net emulators. So what is wrong with the Nokia? Doesnt accept .jsp pages?

Second, I try to pass parameters from an index.wml page to a validate.jsp page that will do the validation. The problem is that the values never get to the jsp page correct, when i do an out.println in order to see what i got the value of the parameter is "undefined"! Can anyone help me?

here is the code:

index.wml page


http://www.wapforum.org/DTD/wml_1.1.xml">

WAP Login

 

      Login ID:  
     

 

 

      Password:
     
 

 
   
       
       
   




____________________________________________________
the validate.jsp page


<%@ page contentType="text/vnd.wap.wml"%>

http://www.wapforum.org/DTD/wml_1.1.xml">
<%@ page import="java.util.*" %>
<%@ page import="java.sql.*"%>
<%@ page import="java.io.*" %>

<%
String username= request.getParameter("telefono");
String password = request.getParameter("password");
String pwd="";
String userid = "";
%>


<%
if(username.equals("")||password.equals(""))
{
%>

 The user name or password was not correct

<%
}
else
{
out.println(username);   /**here is where I check to see the values and I get the "undefined"
out.println(password);

Class.forName("org.gjt.mm.mysql.Driver");
Connection conn5 = DriverManager.getConnection("jdbc:mysql://......");
PreparedStatement PStmt = conn5.prepareStatement("select password,id from people where telefono= ?");
PStmt.setString(1,username);
ResultSet rs = PStmt.executeQuery();

while (rs.next()) {
pwd = rs.getString(1);
userid = rs.getString(2);
}

if (password.equals(pwd)) {
%>


 


<%
}else{
%>

 The user name or password was not found in database

<%
}
}
%>





Another thing, is it possible to do this now that I have the wml? If not how can I automatically redirect user to the main page if the validation is correct?
Thanks for your help.

Answer : problem with wml and jsp

Hi again :-)

I tried your page (cut down to avoid the database access) and found the following:

1) If no parameters (telefono and password) are supplied in the URL, the getParameter(...) returns null.  This leads to a null pointer exception when you try to compare the values using:

if(username.equals("")||password.equals(""))

You should really include tests for null too:

if((username == null) || username.equals("") || (password == null) || (password.equals(""))

This is probably what is causing the 500 error.

I also tried a couple of other changes including putting all the imports onto one line and changing the "<%@ page" method of setting the response content type to using the response.setContentType() method in the main JSP.

However, like you, I can't get my Nokia 6310i to recognise the returned page (I get "No response, try later") :-(

I've had a look around the web and I found a book that deals with the creation of WML pages using ASP and JSP (and servlets), but your code seems to follow this OK.  The first thing is always "Did you set the content type?" and of course, you do.  If I access my test page using my web browser it claims (correctly) that it doesn't recognise "text/vnd.wap.wml" and allows me to save the response.  The response looks perfectly OK to me.

And then...

Following a hunch ...

Aha!!!

I thought I had seen something like this before ;-)

I don't know if this applies to other WAP browsers, but certainly on my Nokia, it is *very* picky about the WML being correctly formed.  Try adding

and

at either side of the out.println() statements you have in the "else" clause.  I added those and it worked!

Here is the code I used for testing (this works):


http://www.wapforum.org/DTD/wml_1.1.xml">
<%@ page import="java.util.*, java.sql.*, java.io.*" %>

<%
response.setContentType("text/vnd.wap.wml");
String username= request.getParameter("tel");
String password = request.getParameter("pas");
String pwd="";
String userid = "";
%>


<%
if(username.equals("")||password.equals(""))
{
%>

 The user name or password was not correct

<%
}
else
{
%>

<%= username %>

<%= password %>

<%
}
%>



As far as I can see, forwarding should work OK.