mirror of
https://github.com/mastodon/mastodon.git
synced 2024-08-20 21:08:15 -07:00
63 lines
2.2 KiB
Ruby
63 lines
2.2 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class ActivityPub::FetchRepliesService < BaseService
|
|
include JsonLdHelper
|
|
|
|
def call(parent_status, collection_or_uri, allow_synchronous_requests: true, request_id: nil)
|
|
@account = parent_status.account
|
|
@allow_synchronous_requests = allow_synchronous_requests
|
|
|
|
@items = collection_items(collection_or_uri)
|
|
return if @items.nil?
|
|
|
|
FetchReplyWorker.push_bulk(filtered_replies) { |reply_uri| [reply_uri, { 'request_id' => request_id }] }
|
|
|
|
@items
|
|
end
|
|
|
|
private
|
|
|
|
def collection_items(collection_or_uri)
|
|
collection = fetch_collection(collection_or_uri)
|
|
return unless collection.is_a?(Hash)
|
|
|
|
collection = fetch_collection(collection['first']) if collection['first'].present?
|
|
return unless collection.is_a?(Hash)
|
|
|
|
case collection['type']
|
|
when 'Collection', 'CollectionPage'
|
|
as_array(collection['items'])
|
|
when 'OrderedCollection', 'OrderedCollectionPage'
|
|
as_array(collection['orderedItems'])
|
|
end
|
|
end
|
|
|
|
def fetch_collection(collection_or_uri)
|
|
return collection_or_uri if collection_or_uri.is_a?(Hash)
|
|
return unless @allow_synchronous_requests
|
|
return if non_matching_uri_hosts?(@account.uri, collection_or_uri)
|
|
|
|
# NOTE: For backward compatibility reasons, Mastodon signs outgoing
|
|
# queries incorrectly by default.
|
|
#
|
|
# While this is relevant for all URLs with query strings, this is
|
|
# the only code path where this happens in practice.
|
|
#
|
|
# Therefore, retry with correct signatures if this fails.
|
|
begin
|
|
fetch_resource_without_id_validation(collection_or_uri, nil, true)
|
|
rescue Mastodon::UnexpectedResponseError => e
|
|
raise unless e.response && e.response.code == 401 && Addressable::URI.parse(collection_or_uri).query.present?
|
|
|
|
fetch_resource_without_id_validation(collection_or_uri, nil, true, request_options: { with_query_string: true })
|
|
end
|
|
end
|
|
|
|
def filtered_replies
|
|
# Only fetch replies to the same server as the original status to avoid
|
|
# amplification attacks.
|
|
|
|
# Also limit to 5 fetched replies to limit potential for DoS.
|
|
@items.map { |item| value_or_id(item) }.reject { |uri| non_matching_uri_hosts?(@account.uri, uri) }.take(5)
|
|
end
|
|
end
|