Rewrite Atom generation from stream entries to use Ox instead of Nokogiri (#1124)

* Rewrite Atom generation from stream entries to use Ox instead of Nokogiri::Builder

StreamEntry is now limited to only statuses, which allows some optimization. Removed
extra queries on AccountsController#show. AtomSerializer instead of AtomBuilderHelper
used in AccountsController#show, StreamEntriesController#show, StreamEntryRenderer
and PubSubHubbub::DistributionWorker

PubSubHubbub::DistributionWorker moves n+1 DomainBlock query to PubSubHubbub::DeliveryWorker
instead.

All Salmon slaps that aren't based on StreamEntry still use AtomBuilderHelper and Nokogiri

* All Salmon slaps now use Ox instead of Nokogiri. No touch from status on account

1 files changed, 3 insertions, 0 deletions

diff --git a/app/workers/pubsubhubbub/delivery_worker.rb b/app/workers/pubsubhubbub/delivery_worker.rb
index 466def3a8..8412be4b7 100644
--- a/app/workers/pubsubhubbub/delivery_worker.rb
+++ b/app/workers/pubsubhubbub/delivery_worker.rb
@@ -13,6 +13,9 @@ class Pubsubhubbub::DeliveryWorker
   def perform(subscription_id, payload)
     subscription = Subscription.find(subscription_id)
     headers      = {}
+    host         = Addressable::URI.parse(subscription.callback_url).host
+
+    return if DomainBlock.blocked?(host)
 
     headers['User-Agent']      = 'Mastodon/PubSubHubbub'
     headers['Link']            = LinkHeader.new([[api_push_url, [%w(rel hub)]], [account_url(subscription.account, format: :atom), [%w(rel self)]]]).to_s