Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://YYY. (Reason: CORS header 'Access-Control-Allow-Origin' missing).

http://stackoverflow.com/questions/23959912/ajax-cross-origin-request-blocked-the-same-origin-policy-disallows-reading-the

http://stackoverflow.com/questions/3506208/jquery-ajax-cross-domain

Browser security prevents making an ajax call from a page hosted on one domain to a page hosted on a different domain; this is called the "same-origin policy".

• We can not get the data from third party website without jsonp.
• JSONP or "JSON with padding" is a communication technique used in JavaScript programs running in web browsers to request data from a server in a different domain, something prohibited by typical web browsers because of the same-origin policy.
• JSONP takes advantage of the fact that browsers do not enforce the same-origin policy on script tags.
• Note that for JSONP to work, a server must know how to reply with JSONP-formatted results.
• JSONP does not work with JSON-formatted results.

jqXHR → The jQuery XMLHttpRequest

JSONP is JSON with padding, that is, you put a string at the beginning and a pair of parenthesis around it. For example:

//JSON
    {"name":"stackoverflow","id":5}
//JSONP
    func({"name":"stackoverflow","id":5});

Use Server Level : Node.js