ruby on rails - Access to top domain cookies from subdomain application -

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my vbulletin forum sets cookies on domain-name.com, , i'd read these cookies within rails app on beta.domain-name.com. how can this?

if set cookie's domain to: .domain-name.com (dot @ beginning), can access it's cookies subdomains, if domain domain-name.com (withouth dot @ beginning) can access it's cookies domain.


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