Fix user archive takeout when using OpenStack Swift or S3 providers with no ACL support (#24200)

app/controllers/backups_controller.rb

@@ -13,7 +13,11 @@ class BackupsController < ApplicationController
     when :s3
       redirect_to @backup.dump.expiring_url(10)
     when :fog
+      if Paperclip::Attachment.default_options.dig(:storage, :fog_credentials, :openstack_temp_url_key).present?
         redirect_to @backup.dump.expiring_url(Time.now.utc + 10)
+      else
+        redirect_to full_asset_url(@backup.dump.url)
+      end
     when :filesystem
       redirect_to full_asset_url(@backup.dump.url)
     end

app/models/backup.rb

@@ -17,6 +17,6 @@
 class Backup < ApplicationRecord
   belongs_to :user, inverse_of: :backups
 
-  has_attached_file :dump, s3_permissions: 'private'
+  has_attached_file :dump, s3_permissions: ->(*) { ENV['S3_PERMISSION'] == '' ? nil : 'private' }
   do_not_validate_attachment_file_type :dump
 end

config/initializers/paperclip.rb

@@ -118,6 +118,7 @@ elsif ENV['SWIFT_ENABLED'] == 'true'
       openstack_domain_name: ENV.fetch('SWIFT_DOMAIN_NAME') { 'default' },
       openstack_region: ENV['SWIFT_REGION'],
       openstack_cache_ttl: ENV.fetch('SWIFT_CACHE_TTL') { 60 },
+      openstack_temp_url_key: ENV['SWIFT_TEMP_URL_KEY'],
     },
 
     fog_directory: ENV['SWIFT_CONTAINER'],