# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.Federator do
require Logger
- @doc "Addresses [memory leaks on recursive replies fetching](https://git.pleroma.social/pleroma/pleroma/issues/161)"
+ @doc """
+ Returns `true` if the distance to target object does not exceed max configured value.
+ Serves to prevent fetching of very long threads, especially useful on smaller instances.
+ Addresses [memory leaks on recursive replies fetching](https://git.pleroma.social/pleroma/pleroma/issues/161).
+ Applies to fetching of both ancestor (reply-to) and child (reply) objects.
+ """
# credo:disable-for-previous-line Credo.Check.Readability.MaxLineLength
- def allowed_incoming_reply_depth?(depth) do
- max_replies_depth = Pleroma.Config.get([:instance, :federation_incoming_replies_max_depth])
+ def allowed_thread_distance?(distance) do
+ max_distance = Pleroma.Config.get([:instance, :federation_incoming_replies_max_depth])
- if max_replies_depth do
- (depth || 1) <= max_replies_depth
+ if max_distance && max_distance >= 0 do
+ # Default depth is 0 (an object has zero distance from itself in its thread)
+ (distance || 0) <= max_distance
else
true
end