So I know you can share your cookies across subdomains eg. staging.mysite.com and www.mysite.com etc by setting the domain of the cookies to ".mysite.com"
BUT, is there a way to share across all the sub dom开发者_如何转开发ains EXCEPT one. e.g. the cookies will not persist on images.mysite.com?
As far as I know this is not possible and that's why sites like stackoverflow use a cookieless domain for static resources which is different than the main domain: http://sstatic.net
That's also part of the recommendations of YSlow for optimizing web applications.
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