7467361d70
When an ActivityPub Announce is processed and the boosted toot is not known, fetch it on behalf of one of the booster's followers. This is to allow fetching self-boosts of previously-unknown private toots. If fetching on behalf of a user fails, try fetching it anonymously: the selected follower of a boosting user may be banned by the boosted toot's author.
52 lines
1.5 KiB
Ruby
52 lines
1.5 KiB
Ruby
# frozen_string_literal: true
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class ActivityPub::FetchRemoteStatusService < BaseService
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include JsonLdHelper
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# Should be called when uri has already been checked for locality
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def call(uri, id: true, prefetched_body: nil, on_behalf_of: nil)
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@json = if prefetched_body.nil?
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fetch_resource(uri, id, on_behalf_of)
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else
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body_to_json(prefetched_body)
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end
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return unless supported_context? && expected_type?
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return if actor_id.nil? || !trustworthy_attribution?(@json['id'], actor_id)
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actor = ActivityPub::TagManager.instance.uri_to_resource(actor_id, Account)
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actor = ActivityPub::FetchRemoteAccountService.new.call(actor_id, id: true) if actor.nil? || needs_update(actor)
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return if actor.nil? || actor.suspended?
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ActivityPub::Activity.factory(activity_json, actor).perform
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end
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private
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def activity_json
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{ 'type' => 'Create', 'actor' => actor_id, 'object' => @json }
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end
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def actor_id
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value_or_id(first_of_value(@json['attributedTo']))
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end
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def trustworthy_attribution?(uri, attributed_to)
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return false if uri.nil? || attributed_to.nil?
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Addressable::URI.parse(uri).normalized_host.casecmp(Addressable::URI.parse(attributed_to).normalized_host).zero?
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end
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def supported_context?
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super(@json)
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end
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def expected_type?
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equals_or_includes_any?(@json['type'], ActivityPub::Activity::Create::SUPPORTED_TYPES + ActivityPub::Activity::Create::CONVERTED_TYPES)
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end
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def needs_update(actor)
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actor.possibly_stale?
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end
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end
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