From: Brian Candler <b.candler@...>
Date: 2010-09-04T09:19:17+09:00
Subject: Re: Read cookie

P奪l Bergstr旦m wrote:
> I'm sorry if I'm unclear. But I don't understand what the problem is 
> with my question. So let me ask again.
> 
> Before I could get the value in a cookie, any cookie, from a browser 
> visiting a rails app using cgi. I used it in Rails in order to get a 
> unique string into the model.

(Presumably a unique string which your app provided in a previous 
request, via Set-Cookie)

> I can't use cookies[:cookie_name] for 
> that. As I understand it I can't do that with Rails 2.3.x ( or 3?). 

Are you sure? Have you tried it? The method seems to be there:
http://api.rubyonrails.org/classes/ActionController/Cookies.html

Or you could try request.cookies["cookie_name"] instead.

However, in a rails app you rarely manipulate cookies directly. Rather 
you'd do:

   session[:foo] = "bar"

By default, Rails serialises the entire session object, signs it 
cryptographically, and then sends it to the client as a cookie. This 
allows you to store sensitive information (e.g. admin rights) whilst 
being sure the user will not be able to tamper with it.
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