Access an XML File from a Server

JavaScript
1

Hi,

I am trying to access an XML file from a server in my JavaScript code.
I have an XML file like this:

-<stream version=“1.2”>
-<room id=“simulator” time=“128168557915”>
-<dimention id=0 x=“1.25” y=“2.00”>
<m mcu=“160” sid=“75”>
</dimention>
</room>
-<room id=“simulator” time=“128168557928”>
-<dimention id=0 x=“1.95” y=“1.86”>
<m mcu=“160” sid=“55”>
</dimention>
</room>
</stream>
this file is generated by an application and I can access it from a URL ( since I am using the simulator for this application the XML is accessible from http://localhost:8081/feed/demo)
This xml file is updated every few seconds and constantly growing.
I have a javascript code which I’ve added the following code to it in order to use the data from XML file:

<script type=“text/javascript”>
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject(“Microsoft.XMLHTTP”);
}
xmlhttp.open(“GET”,“http://localhost:8081/feed/demo”,false);
xmlhttp.send();
xmlDoc=xmlhttp.responseXML;
document.write(“<table border=‘1’>”);
var x=xmlDoc.getElementsByTagName(“room”);
for (i=0;i<x.length;i++)
{
document.write(“<tr><td>”);
document.write(xmlDoc.getElementsByTagName(“dimention”)[i].getAttribute(“x”));
document.write(“</td><td>”);
}
document.write(“</table>”);

</script>

Now here comes my problem: if I have the XML file saved on same drive as html page and I address it like this:
xmlhttp.open(“GET”,“floor.xml”,false);
it works fine, but when I pass the URL it doesn’t. is there anything else I should do in case of loading the xml from URL?

my second question is that I want to use the text values returned by xmlDoc.getElementsByTagName(“dimention”)[i].getAttribute(“x”) in an if statement like this :
if (valuereturned = 2.00)
{
do sth
}
what is the best way to do that, since the returned value is a text.

I need the answer ASAP and I really appreciate your help, thanks :slight_smile:

2

Thanks for the hint. No I am loading it from different host and port. But now you said so, I will test it from the same ones. Thanks :slight_smile:

3

Thank you so much, I havent tried it on a live server. It was only locally, but now you said so, I will try it on a live server.

And thanx for the answer for the second part :slight_smile:

4

Have you tried to test it on a live server? If I remember correctly, there is an issue that occurs when working locally.

As for your second question, you can do:


var value = parseInt(xmlDoc.getElementsByTagName("dimention")[i].getAttribute("x"));

if (value == 2.0) {
  //etc...
}
5

Are you loading the file from the same host and port?

If you’re not, you won’t be able to load it like that (xmlhttprequest enforces a same-origin policy).