为什么jquery的.ajax（）方法不发送我的会话cookie？

Question

After logging in via $.ajax() to a site, I am trying to send a second $.ajax() request to that site - but when I check the headers sent using FireBug, there is no session cookie being included in the request.

What am I doing wrong?

Answer 1

AJAX calls only send Cookies if the url you're calling is on the same domain as your calling script.

This may be a Cross Domain Problem.

Maybe you tried to call a url from www.domain-a.com while your calling script was on www.domain-b.com (In other words: You made a Cross Domain Call in which case the browser won't sent any cookies to protect your privacy).

In this case your options are:

• Write a small proxy which resides on domain-b and forwards your requests to domain-a. Your browser will allow you to call the proxy because it's on the same server as the calling script.
  This proxy then can be configured by you to accept a cookie name and value parameter which it can send to domain-a. But for this to work you need to know the cookie's name and value your server on domain-a wants for authentication.
• If you're fetching JSON objects try to use a JSONP request instead. jQuery supports these. But you need to alter your service on domain-a so that it returns valid JSONP responds.

Glad if that helped even a little bit.