When accessing uncached media attachment, redownload it (#4955)

* When accessing uncached media attachment, redownload it

* Prevent re-download of rejected media
This commit is contained in:
Eugen Rochko 2017-09-16 03:01:45 +02:00 committed by GitHub
parent 6c81f9d6e5
commit 54edb4b853
5 changed files with 60 additions and 5 deletions

View file

@ -0,0 +1,40 @@
# frozen_string_literal: true
class MediaProxyController < ApplicationController
include RoutingHelper
def show
RedisLock.acquire(lock_options) do |lock|
if lock.acquired?
@media_attachment = MediaAttachment.remote.find(params[:id])
redownload! if @media_attachment.needs_redownload? && !reject_media?
end
end
redirect_to full_asset_url(@media_attachment.file.url(version))
end
private
def redownload!
@media_attachment.file_remote_url = @media_attachment.remote_url
@media_attachment.touch(:created_at)
@media_attachment.save!
end
def version
if request.path.ends_with?('/small')
:small
else
:original
end
end
def lock_options
{ redis: Redis.current, key: "media_download:#{params[:id]}" }
end
def reject_media?
DomainBlock.find_by(domain: @media_attachment.account.domain)&.reject_media?
end
end

View file

@ -56,15 +56,21 @@ class MediaAttachment < ApplicationRecord
validates :account, presence: true
scope :attached, -> { where.not(status_id: nil) }
scope :attached, -> { where.not(status_id: nil) }
scope :unattached, -> { where(status_id: nil) }
scope :local, -> { where(remote_url: '') }
scope :local, -> { where(remote_url: '') }
scope :remote, -> { where.not(remote_url: '') }
default_scope { order(id: :asc) }
def local?
remote_url.blank?
end
def needs_redownload?
file.blank? && remote_url.present?
end
def to_param
shortcode
end

View file

@ -7,11 +7,19 @@ class REST::MediaAttachmentSerializer < ActiveModel::Serializer
:remote_url, :text_url, :meta
def url
full_asset_url(object.file.url(:original))
if object.needs_redownload?
media_proxy_url(object.id, :original)
else
full_asset_url(object.file.url(:original))
end
end
def preview_url
full_asset_url(object.file.url(:small))
if object.needs_redownload?
media_proxy_url(object.id, :small)
else
full_asset_url(object.file.url(:small))
end
end
def text_url

View file

@ -98,6 +98,8 @@ Rails.application.routes.draw do
resources :media, only: [:show]
resources :tags, only: [:show]
get '/media_proxy/:id/(*any)', to: 'media_proxy#show', as: :media_proxy
# Remote follow
resource :authorize_follow, only: [:show, :create]
resource :share, only: [:show, :create]

View file

@ -83,7 +83,6 @@ namespace :mastodon do
MediaAttachment.where.not(remote_url: '').where('created_at < ?', time_ago).find_each do |media|
media.file.destroy
media.type = :unknown
media.save
end
end