ActivityPub MRF: implement the SimplePolicy policy

This commit is contained in:
William Pitcock 2018-04-14 11:31:12 +00:00
parent 4a178b3d65
commit d24ddd9fb9
2 changed files with 71 additions and 0 deletions

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@ -55,6 +55,12 @@
federating: true,
rewrite_policy: Pleroma.Web.ActivityPub.MRF.NoOpPolicy
config :pleroma, :mrf_simple,
media_removal: [],
media_nsfw: [],
federated_timeline_removal: [],
reject: []
config :pleroma, :media_proxy,
enabled: false,
redirect_on_failure: true

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@ -0,0 +1,65 @@
defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
alias Pleroma.User
@mrf_policy Application.get_env(:pleroma, :mrf_simple)
@reject Keyword.get(@mrf_policy, :reject)
defp check_reject(actor_info, object) do
if actor_info.host in @reject do
{:reject, nil}
else
{:ok, object}
end
end
@media_removal Keyword.get(@mrf_policy, :media_removal)
defp check_media_removal(actor_info, object) do
if actor_info.host in @media_removal do
object = Map.delete(object, "attachments")
end
{:ok, object}
end
@media_nsfw Keyword.get(@mrf_policy, :media_nsfw)
defp check_media_nsfw(actor_info, object) do
if actor_info.host in @media_nsfw and object["attachment"] != nil and length(object["attachment"]) > 0 do
tags = (object["tag"] || []) ++ ["nsfw"]
object = Map.put(object, "tags", tags)
object = Map.put(object, "sensitive", true)
end
{:ok, object}
end
@ftl_removal Keyword.get(@mrf_policy, :federated_timeline_removal)
defp check_ftl_removal(actor_info, object) do
if actor_info.host in @ftl_removal do
user = User.get_by_ap_id(object["actor"])
# flip to/cc relationship to make the post unlisted
if "https://www.w3.org/ns/activitystreams#Public" in object["to"] and user.follower_address in object["cc"] do
to = List.delete(object["to"], "https://www.w3.org/ns/activitystreams#Public") ++ [user.follower_address]
cc = List.delete(object["cc"], user.follower_address) ++ ["https://www.w3.org/ns/activitystreams#Public"]
object = Map.put(object, "to", to)
object = Map.put(object, "cc", cc)
end
end
{:ok, object}
end
def filter(object) do
actor_info = URI.parse(object["actor"])
with {:ok, object} <- check_reject(actor_info, object),
{:ok, object} <- check_media_removal(actor_info, object),
{:ok, object} <- check_media_nsfw(actor_info, object),
{:ok, object} <- check_ftl_removal(actor_info, object) do
{:ok, object}
else
e -> {:reject, nil}
end
end
end