Cross-domain service script

Question

I am working on a site which is utilizing some plug-ins from a another company. An item this other company is providing is a link to an XML file which is generated/updated daily. The owner of the site I am working on wants to have the information within this file visible on his home page in a side bar. If I save the XML file within his site and create the Spry data set, everything works beautifully, but if I create the data set linking to the XML file url, it doesn't work. Because this is information updated daily, I do not want to have to go into this site, save a new XML file and upload it daily. Within the Spry Framework Help in Dreamweaver, I found this:
"The URL you decide to use (whether absolute or relative) is subject to the browser’s security model, which means that you can only load data from an XML source that is on the same server domain as the HTML page you’re linking from. You can avoid this limitation by providing a cross-domain service script. For more information, consult your server administrator."
I contacted the other company about this cross-domain service script, but they didn't seem to have a solution. I have no idea where to begin or what to do to resolve this. Any suggestions are most appreciated.
Thanks,
A

Answer 1

crossdomain script might be wrong term for your solution here. What 
you basically need a script on your server, that does request to the 
crossdomain server. This script will get / read / your required xml 
file and just prints its contents with the correct header. These 
scripts are also known as proxy scripts. For example a script like 
this: http://www.phpfour.com/blog/2008/03/cross-domain-ajax-using-php/
hopes this helps.