Rails Cache-Control

October 27, 2020

For enabling setting cache-control headers of static assets and using a CDN on Heroku:

config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
config.public_file_server.headers = {
  'Cache-Control' => 'public, max-age=31536000',
  # You need to enable this (or set it to your domain) for fonts to work
  'Access-Control-Allow-Origin' => '*'
}

if ENV['ASSET_HOST'].present?
  config.action_controller.asset_host = ENV['ASSET_HOST'] # 'https://cdn.example.com'
end

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