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# rubocop:disable Naming/FileName
# frozen_string_literal: true
module ObjectStorage
module CDN
class GoogleCDN
include Gitlab::Utils::StrongMemoize
attr_reader :options
def initialize(options)
@options = HashWithIndifferentAccess.new(options.to_h)
GoogleIpCache.async_refresh unless GoogleIpCache.ready?
end
def use_cdn?(request_ip)
return false unless config_valid?
ip = IPAddr.new(request_ip)
return false if ip.private?
!GoogleIpCache.google_ip?(request_ip)
end
def signed_url(path, expiry: 10.minutes)
expiration = (Time.current + expiry).utc.to_i
uri = Addressable::URI.parse(cdn_url)
uri.path = path
uri.query = "Expires=#{expiration}&KeyName=#{key_name}"
signature = OpenSSL::HMAC.digest('SHA1', decoded_key, uri.to_s)
encoded_signature = Base64.urlsafe_encode64(signature)
uri.query += "&Signature=#{encoded_signature}"
uri.to_s
end
private
def config_valid?
[key_name, decoded_key, cdn_url].all?(&:present?)
end
def key_name
strong_memoize(:key_name) do
options['key_name']
end
end
def decoded_key
strong_memoize(:decoded_key) do
Base64.urlsafe_decode64(options['key']) if options['key']
rescue ArgumentError
Gitlab::ErrorTracking.log_exception(ArgumentError.new("Google CDN key is not base64-encoded"))
nil
end
end
def cdn_url
strong_memoize(:cdn_url) do
options['url']
end
end
end
end
end
# rubocop:enable Naming/FileName
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