If you're crossing domains then you need to be aware of the Same Origin Policy that browsers implement which will in most cases prevent you from successfully calling the Liferay JSON webservices. A way to get around this is to use JSONP, a generic non-Liferay related example is
here.
As far as I know Liferay 6.1+ doesn't support JSONP out of the box, but all you need to do is create a
ServletFilter hook or a
delegate servlet which reverse proxies the Liferay JSON URLs and makes the following changes to the response:
- Change the response Content-Type header to "application/javascript"
- Prefix the response body with a Javascript function call. for example "callback(" (omitting the quotation marks)
- Suffix the response content with a closing bracket for the JavaScript function all. i.e. " ) " (omitting the quotation marks)
If you're experienced with manipulating OutputStreams via servlet filters then you could actually wrap Liferay's OutputStream and achieve the above that way too.
Your non-Liferay website would need to implement the callback() function which will receive a JSON object as parameter.
Hope this helps.
-Stian
