catstodon/app/controllers/settings/exports_controller.rb
ThibG 5506b9406d Avoid race conditions when creating backups (#10234)
Under load, multiple backups for a single user could be planned, which
is very expensive.
2019-03-11 00:50:31 +01:00

37 lines
766 B
Ruby

# frozen_string_literal: true
class Settings::ExportsController < Settings::BaseController
include Authorization
layout 'admin'
before_action :authenticate_user!
def show
@export = Export.new(current_account)
@backups = current_user.backups
end
def create
raise Mastodon::NotPermittedError unless user_signed_in?
backup = nil
RedisLock.acquire(lock_options) do |lock|
if lock.acquired?
authorize :backup, :create?
backup = current_user.backups.create!
else
raise Mastodon::RaceConditionError
end
end
BackupWorker.perform_async(backup.id)
redirect_to settings_export_path
end
def lock_options
{ redis: Redis.current, key: "backup:#{current_user.id}" }
end
end