asp.net - can jquery ajax call external webservice?

Question

Can jquery ajax code call a webservice from another domain name or another website?
Like this:

$.ajax({
    type: "POST",
    url: "http://AnotherWebSite.com/WebService.asmx/HelloWorld",
    data: "{'name':'" + $('#price').val() + "'}",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function (msg) { alert(msg); }
});

And how should I config this webservice?

Answer 1

you can use JSONP to make cross domain requests. with jquery you can make a jsonp request using the $.json function and specifying a callback in the url like so:

&callback=?

Actually, all you need is the question mark as the param value, the param name can be anything.

Only catch, is that the server you are making the request to must support jsonp

For more in depth information see this blog post about making jsonp work with the new york times json api:

http://notetodogself.blogspot.com/2009/02/using-jquery-with-nyt-json-api.html