cross-domain AJAX post call

Question

I've to make a POST call(with parameter) to an asp form which is located on another server.

For development, I did this on the same server, and it works perfectly, but now I'm testing it on another server, and instead of receiving a 200 status, I receive a 0 status.

I think it's because it's a cross-domain AJAX call, it's the only thing which changed. So how can I make this call? Is there any file I can put on the server/client to allow this call(like flash, ...)?

Thank you!

Answer 1

You can either create a proxy script, or use jsonp. The easier course would be to use a proxy script on your server.

Answer 2

Yes, assuming you can change the server you connect to

You can implement Cross Origin Resource Sharing (CORS)

You need the server to return Access-Control-Allow-Origin: * if you want to allow all domains to access, otherwise return Access-Control-Allow-Origin: http://yourdomain.com

If you cannot change the server you are accessing, you need to use a proxy on the server your script comes from - alternatively investigate if they have published an API to return for example JSONP

More details here

• MDN HTTP access control (how)
• W3Org (Implemation details)
• MSDN XDR

and several links to the right of this questions