Hi All,
I posted this to the Sun JSP forum but got no replies. My web-application runs
on JBoss-3.2.0/Jetty - I must first get comfortable with the latest
JBoss/Tomcat offering before I run something in it.
As this is a sticky problem there were no replies on the Sun JSP forum.
Anybody on this forum has the faintest idea what is going on?
This is a tricky one. There are vehicle objects in the database. Some are cars,
some 4wd's, some trucks, some motorcycles etc. The first objective is to get
all the makes of a certain category - cars, 4wd's etc.
This is done with the following code in a cmp ejb:
public String ejbHomeListMakes(String category){
try{
Collection collection = this.ejbSelectMakes(category);
//To get them in alpahbetical order
List s = new LinkedList(collection);
Collections.sort(s);
Iterator iter = s.iterator();
if(iter.hasNext()){
StringBuffer make = new StringBuffer(256);
while(iter.hasNext()){
make = make.append("\"" +(String)iter.next() + "\",");
}
// Remove the trailing comma
make = make.deleteCharAt((make.length() - 1));
return make.toString();
}
else
return new String("");
}
This string (in the format "Audi","BMW","Chevrolet", etc) is returned to a JSP
by the following code:
Note that it is a mixture of JavaScript and Java
function loadMakesAndModels(toLoad){
if(document.getElementById){
/* First to create all the JavaScript array objects
* The car makes and models */
<% String cmakes = makesAndModelsBean.getMakes("car");
if(cmakes.length() > 2){%>
var carMakes = new Array("Choose","Any",<%= cmakes %>);
Now, in every browser on my Linux side this works perfectly. Also, for MSIE 6.x
on my Windows 98 SE side it works perfectly. The returned code in the page
returned from the server looks like this:
var carMakes = new
Array("Choose","Any","Audi","BMW","Daewoo","Daihatsu","Ford","Holden","Honda","
Hyundai","Kia","Mazda","Mercedes
Benz","Mitsubishi","Nissan","Proton","Saab","Seat","Subaru","Suzuki","Toyota","Volkswagen");
This also works in Windows 2000 with MSIE 6.x Unfortunately it does not work
with either MSIE 6.x or FireFox in Windows XP (I do not know what patches or
updates have been applied) or with MSIE 6.x in Windows 98 - I suspect not
Second Edition, on another machine. This other machine is pretty neglected most
likely in need of disk defragmentation and clean-up. But that should not make
any difference to what is returned to the browser from the server.
Some cars makes are always consistently missing, namely the Audi, BMW, Daewoo,
Subaru and a few others. I have looked at the code, these makes are indeed
missing - the same ones every time.
Now, as we all know the browser never sees a Java Server Page. Only pure HTML
(with JavaScript) is returned to it from the server.
So how is it possible that different pages are returned to browsers on
different operating systems? Truly, this beats me.
You can go and have a look at this site at here The code is in the top frame.
It is loaded only once when this page is first requested. Search only for NSW
(state) and Newcastle and Hunter (regions).
Is it the server? How does the server (JBoss-3.2.0/Jetty) know to send crooked
code to certain Windows machines? I don't check for the OS in my code. Maybe it
doesn't like Windows or has somthing personal against Bill Gates.
What the devil is going on here and how do I fix it? I don't think the answer
is simple.
Thanks very much for scratching your heads on this one.
Chris
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