activestorage/app/controllers/active_storage/previews_controller.rb


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# frozen_string_literal: true

class ActiveStorage::PreviewsController < ActionController::Base
  include ActiveStorage::SetBlob

  def show
    expires_in ActiveStorage::Blob.service.url_expires_in
    redirect_to ActiveStorage::Preview.new(@blob, params[:variation_key]).processed.service_url(disposition: params[:disposition])
  end
end