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[#1505] Restricted max thread distance for fetching replies on incoming federation (in addition to reply-to depth restriction).

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Ivan Tashkinov 2020-02-15 20:41:38 +03:00
commit 269d592181
8 changed files with 120 additions and 31 deletions
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16
lib/pleroma/web/federator/federator.ex
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@ -15,13 +15,19 @@ 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