set_cookie

# File actionpack/lib/action_controller/vendor/rack-1.0/rack/response.rb, line 56
    def set_cookie(key, value)
      case value
      when Hash
        domain  = "; domain="  + value[:domain]    if value[:domain]
        path    = "; path="    + value[:path]      if value[:path]
        # According to RFC 2109, we need dashes here.
        # N.B.: cgi.rb uses spaces...
        expires = "; expires=" + value[:expires].clone.gmtime.
          strftime("%a, %d-%b-%Y %H:%M:%S GMT")    if value[:expires]
        secure = "; secure"  if value[:secure]
        httponly = "; HttpOnly" if value[:httponly]
        value = value[:value]
      end
      value = [value]  unless Array === value
      cookie = Utils.escape(key) + "=" +
        value.map { |v| Utils.escape v }.join("&") +
        "#{domain}#{path}#{expires}#{secure}#{httponly}"

      case self["Set-Cookie"]
      when Array
        self["Set-Cookie"] << cookie
      when String
        self["Set-Cookie"] = [self["Set-Cookie"], cookie]
      when nil
        self["Set-Cookie"] = cookie
      end
    end