mastodon/app/lib/activitypub/activity/create.rb
Eugen Rochko 790d3bc637
Move network calls out of transaction in ActivityPub handler (#8951)
Mention and emoji code may perform network calls, but does not need
to do that inside the database transaction. This may improve availability
of database connections when using pgBouncer in transaction mode.
2018-10-11 00:50:18 +02:00

310 lines
8.5 KiB
Ruby

# frozen_string_literal: true
class ActivityPub::Activity::Create < ActivityPub::Activity
SUPPORTED_TYPES = %w(Note).freeze
CONVERTED_TYPES = %w(Image Video Article).freeze
def perform
return if delete_arrived_first?(object_uri) || unsupported_object_type? || invalid_origin?(@object['id'])
RedisLock.acquire(lock_options) do |lock|
if lock.acquired?
@status = find_existing_status
process_status if @status.nil?
else
raise Mastodon::RaceConditionError
end
end
@status
end
private
def process_status
@tags = []
@mentions = []
@params = {}
process_status_params
process_tags
ApplicationRecord.transaction do
@status = Status.create!(@params)
attach_tags(@status)
end
resolve_thread(@status)
distribute(@status)
forward_for_reply if @status.public_visibility? || @status.unlisted_visibility?
end
def find_existing_status
status = status_from_uri(object_uri)
status ||= Status.find_by(uri: @object['atomUri']) if @object['atomUri'].present?
status
end
def process_status_params
@params = begin
{
uri: @object['id'],
url: object_url || @object['id'],
account: @account,
text: text_from_content || '',
language: detected_language,
spoiler_text: text_from_summary || '',
created_at: @object['published'],
override_timestamps: @options[:override_timestamps],
reply: @object['inReplyTo'].present?,
sensitive: @object['sensitive'] || false,
visibility: visibility_from_audience,
thread: replied_to_status,
conversation: conversation_from_uri(@object['conversation']),
media_attachment_ids: process_attachments.take(4).map(&:id),
}
end
end
def attach_tags(status)
@tags.each do |tag|
status.tags << tag
TrendingTags.record_use!(hashtag, status.account, status.created_at) if status.public_visibility?
end
@mentions.each do |mention|
mention.status = status
mention.save
end
end
def process_tags
return if @object['tag'].nil?
as_array(@object['tag']).each do |tag|
if equals_or_includes?(tag['type'], 'Hashtag')
process_hashtag tag
elsif equals_or_includes?(tag['type'], 'Mention')
process_mention tag
elsif equals_or_includes?(tag['type'], 'Emoji')
process_emoji tag
end
end
end
def process_hashtag(tag)
return if tag['name'].blank?
hashtag = tag['name'].gsub(/\A#/, '').mb_chars.downcase
hashtag = Tag.where(name: hashtag).first_or_create(name: hashtag)
return if @tags.include?(hashtag)
@tags << hashtag
rescue ActiveRecord::RecordInvalid
nil
end
def process_mention(tag)
return if tag['href'].blank?
account = account_from_uri(tag['href'])
account = ::FetchRemoteAccountService.new.call(tag['href'], id: false) if account.nil?
return if account.nil?
@mentions << Mention.new(account: account)
end
def process_emoji(tag)
return if skip_download?
return if tag['name'].blank? || tag['icon'].blank? || tag['icon']['url'].blank?
shortcode = tag['name'].delete(':')
image_url = tag['icon']['url']
uri = tag['id']
updated = tag['updated']
emoji = CustomEmoji.find_by(shortcode: shortcode, domain: @account.domain)
return unless emoji.nil? || image_url != emoji.image_remote_url || (updated && emoji.updated_at >= updated)
emoji ||= CustomEmoji.new(domain: @account.domain, shortcode: shortcode, uri: uri)
emoji.image_remote_url = image_url
emoji.save
end
def process_attachments
return [] if @object['attachment'].nil?
media_attachments = []
as_array(@object['attachment']).each do |attachment|
next if attachment['url'].blank?
href = Addressable::URI.parse(attachment['url']).normalize.to_s
media_attachment = MediaAttachment.create(account: @account, remote_url: href, description: attachment['name'].presence, focus: attachment['focalPoint'])
media_attachments << media_attachment
next if unsupported_media_type?(attachment['mediaType']) || skip_download?
media_attachment.file_remote_url = href
media_attachment.save
end
media_attachments
rescue Addressable::URI::InvalidURIError => e
Rails.logger.debug e
media_attachments
end
def resolve_thread(status)
return unless status.reply? && status.thread.nil?
ThreadResolveWorker.perform_async(status.id, in_reply_to_uri)
end
def conversation_from_uri(uri)
return nil if uri.nil?
return Conversation.find_by(id: OStatus::TagManager.instance.unique_tag_to_local_id(uri, 'Conversation')) if OStatus::TagManager.instance.local_id?(uri)
Conversation.find_by(uri: uri) || Conversation.create(uri: uri)
end
def visibility_from_audience
if equals_or_includes?(@object['to'], ActivityPub::TagManager::COLLECTIONS[:public])
:public
elsif equals_or_includes?(@object['cc'], ActivityPub::TagManager::COLLECTIONS[:public])
:unlisted
elsif equals_or_includes?(@object['to'], @account.followers_url)
:private
else
:direct
end
end
def audience_includes?(account)
uri = ActivityPub::TagManager.instance.uri_for(account)
equals_or_includes?(@object['to'], uri) || equals_or_includes?(@object['cc'], uri)
end
def replied_to_status
return @replied_to_status if defined?(@replied_to_status)
if in_reply_to_uri.blank?
@replied_to_status = nil
else
@replied_to_status = status_from_uri(in_reply_to_uri)
@replied_to_status ||= status_from_uri(@object['inReplyToAtomUri']) if @object['inReplyToAtomUri'].present?
@replied_to_status
end
end
def in_reply_to_uri
value_or_id(@object['inReplyTo'])
end
def text_from_content
return Formatter.instance.linkify([text_from_name, object_url || @object['id']].join(' ')) if converted_object_type?
if @object['content'].present?
@object['content']
elsif content_language_map?
@object['contentMap'].values.first
end
end
def text_from_summary
if @object['summary'].present?
@object['summary']
elsif summary_language_map?
@object['summaryMap'].values.first
end
end
def text_from_name
if @object['name'].present?
@object['name']
elsif name_language_map?
@object['nameMap'].values.first
end
end
def detected_language
if content_language_map?
@object['contentMap'].keys.first
elsif name_language_map?
@object['nameMap'].keys.first
elsif summary_language_map?
@object['summaryMap'].keys.first
elsif supported_object_type?
LanguageDetector.instance.detect(text_from_content, @account)
end
end
def object_url
return if @object['url'].blank?
url_candidate = url_to_href(@object['url'], 'text/html')
if invalid_origin?(url_candidate)
nil
else
url_candidate
end
end
def summary_language_map?
@object['summaryMap'].is_a?(Hash) && !@object['summaryMap'].empty?
end
def content_language_map?
@object['contentMap'].is_a?(Hash) && !@object['contentMap'].empty?
end
def name_language_map?
@object['nameMap'].is_a?(Hash) && !@object['nameMap'].empty?
end
def unsupported_object_type?
@object.is_a?(String) || !(supported_object_type? || converted_object_type?)
end
def unsupported_media_type?(mime_type)
mime_type.present? && !(MediaAttachment::IMAGE_MIME_TYPES + MediaAttachment::VIDEO_MIME_TYPES).include?(mime_type)
end
def supported_object_type?
equals_or_includes_any?(@object['type'], SUPPORTED_TYPES)
end
def converted_object_type?
equals_or_includes_any?(@object['type'], CONVERTED_TYPES)
end
def skip_download?
return @skip_download if defined?(@skip_download)
@skip_download ||= DomainBlock.find_by(domain: @account.domain)&.reject_media?
end
def invalid_origin?(url)
return true if unsupported_uri_scheme?(url)
needle = Addressable::URI.parse(url).host
haystack = Addressable::URI.parse(@account.uri).host
!haystack.casecmp(needle).zero?
end
def reply_to_local?
!replied_to_status.nil? && replied_to_status.account.local?
end
def forward_for_reply
return unless @json['signature'].present? && reply_to_local?
ActivityPub::RawDistributionWorker.perform_async(Oj.dump(@json), replied_to_status.account_id, [@account.preferred_inbox_url])
end
def lock_options
{ redis: Redis.current, key: "create:#{@object['id']}" }
end
end