mastodon/app/lib/cache_buster.rb
Eugen Rochko df1653174b
Add cache buster feature for media files ()
Nginx can be configured to bypass proxy cache when a special header
is in the request. If the response is cacheable, it will replace
the cache for that request. Proxy caching of media files is
desirable when using object storage as a way of minimizing bandwidth
costs, but has the drawback of leaving deleted media files for
a configured amount of cache time. A cache buster can make those
media files immediately unavailable. This especially makes sense
when suspending and unsuspending an account.
2020-11-19 17:38:06 +01:00

29 lines
617 B
Ruby

# frozen_string_literal: true
class CacheBuster
def initialize(options = {})
@secret_header = options[:secret_header] || 'Secret-Header'
@secret = options[:secret] || 'True'
end
def bust(url)
site = Addressable::URI.parse(url).normalized_site
request_pool.with(site) do |http_client|
build_request(url, http_client).perform
end
end
private
def request_pool
RequestPool.current
end
def build_request(url, http_client)
Request.new(:get, url, http_client: http_client).tap do |request|
request.add_headers(@secret_header => @secret)
end
end
end