How do I know if a server has JSONP turned on?

Question

How do I know if a server has JSONP turned on? It is not my server, but I try to access some information from the rendered html.

Thanks in advance.

Answer 1

The server has JSONP turned on if you can add callback to the URL:

http://example.com/api/get_info.js?callback=myfunc

and the server responds with your requested information in JSON-format, wrapped with your callback:

myfunc({
    /* json formatted data goes here */
});