javascript xml loading

[solmyr72]

Hi,

I'm new to the javascript XML(DOM) API.
I'm trying to:
- Read some xml data (from the server, synchronously).
- Parse it (using javascript DOM API).

Unfortunately, javascript keept telling me that it found an empty xml document (no child nodes)...
Could anyone guess what's wrong ?
BTW I can tell the request *does* arrive to my server (I'm logging it).

Thanks a lot.


My server-side xml (generated through java/jsp).
Notes:
- I can tell this *is* being called:
- I've tried it with and without the '<? xml ... ?> directive.

<%@page contentType="text/xml" %>
<? xml version="1.0" ?>
<users><user name='john'></user></users>

<%
	System.out.println("server sending xml response");
%>

My javascript (meant for Firefox 5):

// Firefox 5 code:
function testXml(){
   var xmldoc = document.implementation.createDocument(null, null, null);
   xmldoc.async = false; 			
   xmldoc.load("[URL unfurl="true"]http://myDomain/MT/MANTIS/pelTest");[/URL]
   var children= xmldoc.childNodes;
   alert(children.length);

 

[tsuji]

Just a few suggestions see if they lead to positive results.

[1] The prolog <? xml with a space between is not valid. Take the space out.
[tt]<[highlight]?x[/highlight]ml version="1.0" ?>[/tt]
[2] Take out the last jsp output line out, it makes the xml fail at parsing because it would be mal-formed.
[tt][red]//[/red]System.out.println("server sending xml response");[/tt]
[3] Set the first two param to empty string, not null.
[tt]var xmldoc = document.implementation.createDocument([blue]"", ""[/blue], null);[/tt]
[4] Name the jsp page to having extension .jsp. (This may not be necessary, I am not sure the necessary settings where it may work as you script it without extension.)
[tt]xmldoc.load("

http://myDomain/MT/MANTIS/pelTest

[blue].jsp[/blue]");[/tt]
[5] You can monitor whether there is a parsing/loading error by alerting the return value of the load line. If the result is false, you can anticipate problem.
[tt] var bret=xmldoc.load("

http://myDomain/MT/MANTIS/pelTest.jsp");

alert(bret); //should be returned true if things work[/tt]

 

[tsuji]

Amendment
[2/[red]ignored[/red]] Upon re-reading, you can ignore the note [2]. It is immaterial to the problem. It writes to server log and hence has no impact on the .load line. My bad!

 

[solmyr72]

Thank you very much, 'tsuji', for this detailed reply.
You were right, of course, especially with [5] : the 'load' function returns false.
Would you happen you know if javascript/browsers can report the exact error details ?

In any case, thanks very much.

 

[tsuji]

May be you can test a two-line test page (test.jsp) say like this.
[tt]
<%@page contentType="text/xml;charset=UTF-8" %>
<% out.print("<users><user name='john'></user></users>"); %>
[/tt]
The .load line should point to it.