Let's specify a ProxyHost and get data from Flickr in real time.
If you use that file, be sure to have Python installed. By default, the file would go in
c:/xampp/cgi-bin using Xampp on Windows or on Linux:
/var/www/cgi (the location may vary between distributions). In your code, specify the ProxyHost, changing the URL to point to your ProxyHost:
OpenLayers.ProxyHost = '/cgi-bin/proxy.cgi?url=';