9f3f47e91f
* Fetch up to 5 replies when discovering a new remote status This is used for resolving threads downwards. The originating server must add a “replies” attributes with such replies for it to be useful. * Add some tests for ActivityPub::FetchRepliesWorker * Add specs for ActivityPub::FetchRepliesService * Serialize up to 5 public self-replies for ActivityPub notes * Add specs for ActivityPub::NoteSerializer * Move exponential backoff logic to a worker concern * Fetch first page of paginated collections when fetching thread replies * Add specs for paginated collections in replies * Move Note replies serialization to a first CollectionPage The collection isn't actually paginable yet as it has no id nor a `next` field. This may come in another PR. * Use pluck(:uri) instead of map(&:uri) to improve performances * Fix fetching replies when they are in a CollectionPage
60 lines
1.7 KiB
Ruby
60 lines
1.7 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class ActivityPub::FetchRepliesService < BaseService
|
|
include JsonLdHelper
|
|
|
|
def call(parent_status, collection_or_uri, allow_synchronous_requests = true)
|
|
@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)
|
|
|
|
@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'
|
|
collection['items']
|
|
when 'OrderedCollection', 'OrderedCollectionPage'
|
|
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 invalid_origin?(collection_or_uri)
|
|
collection = fetch_resource_without_id_validation(collection_or_uri)
|
|
raise Mastodon::UnexpectedResponseError if collection.nil?
|
|
collection
|
|
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| invalid_origin?(uri) }.take(5)
|
|
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
|
|
end
|