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# frozen_string_literal: true
# Take a signed permanent reference for a variant and turn it into an expiring service URL for download.
# Note: These URLs are publicly accessible. If you need to enforce access protection beyond the
# security-through-obscurity factor of the signed blob and variation reference, you'll need to implement your own
# authenticated redirection controller.
class ActiveStorage::VariantsController < ActionController::Base
def show
if blob = ActiveStorage::Blob.find_signed(params[:signed_blob_id])
expires_in ActiveStorage::Blob.service.url_expires_in
redirect_to ActiveStorage::Variant.new(blob, params[:variation_key]).processed.service_url(disposition: params[:disposition])
else
head :not_found
end
end
end
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