def set_cookie(key, value)
case value
when Hash
domain = "; domain=" + value[:domain] if value[:domain]
path = "; path=" + value[:path] if value[:path]
expires = "; expires=" + value[:expires].clone.gmtime.
strftime("%a, %d-%b-%Y %H:%M:%S GMT") if value[:expires]
secure = "; secure" if value[:secure]
value = value[:value]
end
value = [value] unless Array === value
cookie = Utils.escape(key) + "=" +
value.map { |v| Utils.escape v }.join("&") +
"#{domain}#{path}#{expires}#{secure}"
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