From c285c6824dc186e00040b7283877fea917050275 Mon Sep 17 00:00:00 2001 From: David Heinemeier Hansson Date: Sun, 23 Jul 2017 11:06:06 -0500 Subject: Provide a BlobsController for stable blob URLs We need to have stable urls for blobs and variants or caching won't work. So provide a controller that can give that and redirect to the service URL upon lookup. --- app/controllers/active_storage/blobs_controller.rb | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 app/controllers/active_storage/blobs_controller.rb (limited to 'app/controllers') diff --git a/app/controllers/active_storage/blobs_controller.rb b/app/controllers/active_storage/blobs_controller.rb new file mode 100644 index 0000000000..5a527d0a33 --- /dev/null +++ b/app/controllers/active_storage/blobs_controller.rb @@ -0,0 +1,22 @@ +# Take a signed permanent reference for a blob and turn it into an expiring service URL for its download. +# Note: These URLs are publicly accessible. If you need to enforce access protection beyond the +# security-through-obscurity factor of the signed blob references, you'll need to implement your own +# authenticated redirection controller. +class ActiveStorage::BlobsController < ActionController::Base + def show + if blob = find_signed_blob + redirect_to blob.url(disposition: disposition_param) + else + head :not_found + end + end + + private + def find_signed_blob + ActiveStorage::Blob.find_signed(params[:signed_id]) + end + + def disposition_param + params[:disposition].presence_in(%w( inline attachment )) || "inline" + end +end -- cgit v1.2.3