How to request different domain with Ajax in jQuery

Question

I need to make a request to a different domain with Ajax in jQuery!

Should I use iframe ?

Edited:

On facebook.com working chat, with few different domain name?

GET http:// www.facebook.com/ajax/presence/reconnect.php?__a=1&reason=6&iframe_loaded=false&post_form_id=23be2df75b74a0bcb61358814c56ba4f 200 OK

GET http://0.50.channel.facebook.com/x/2562941315/4271808869/true/p_1529934952=2 200 OK

I want something like...

Answer 1

You can not because of same origin policy .

You have a few options.

JSONP

You make a request with a script element, and pass it a callback to one of your functions to handle the data.

Server side proxy

Basically, you create a wrapper on the server side. You can use cURL or equivalent. Request the data with your server and then serve it from under the same domain.

Answer 2

You can't. Consider using JSONP instead, which uses <script> tags to retrieve data.

Answer 3

看看http://api.jquery.com/jQuery.getJSON/和JSONP