Custom headers with $.ajax type jsnop or json

问题

I have a problem with sending some custom headers to with a jQuery ajax JSON (or JSONP) request.

Code looks like this:

$.ajax({
      beforeSend: function(xhr) {
        xhr.setRequestHeader("X-VER",       VER);
        xhr.setRequestHeader("X-TIMESTAMP", now);
     },
     type: 'GET',
     data: null,
     url: site_uri,
     dataType: 'jsonp',
     success: function(msg){$(selector).html(msg);}
});

Firebug shows no custom headers. In addition the url changes with jsonp (can I change this?)

Edit:

I found that it probably violates http://en.wikipedia.org/wiki/Same_origin_policy but have no idea how to get it fixed (the script can't be on the same domain).

Thanks for any help

回答1:

If you have server access, a solution would be HTTP access control modification. Otherwise, probably the best idea is some kind of reverse proxy solution, I have no idea how good of support access control has outside of Firefox.

回答2:

jsonp isn't XHR (you are simply adding script elements to the head), emulating XHR. Hence, you can't set custom headers.

来源：https://stackoverflow.com/questions/3759575/custom-headers-with-ajax-type-jsnop-or-json