pleroma

commit: a8701b59c33526d89054e7eb142cc3ccb3ad1180
parent b43c7afde686f0a46d1983f57024d6f91f15a056
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Mon,  6 Mar 2023 22:21:35 +0100

MRF: Add SoftwarePolicy with blocks against Wildebeest

Note: Wildebeest is abandonned, this is only there if another more or less
proprietary implementation shows up.

Diffstat:
A
lib/pleroma/web/activity_pub/mrf/software_policy.ex
52
++++++++++++++++++++++++++++++++++++++++++++++++++++

1 file changed, 52 insertions(+), 0 deletions(-)
diff --git a/lib/pleroma/web/activity_pub/mrf/software_policy.ex b/lib/pleroma/web/activity_pub/mrf/software_policy.ex
@@ -0,0 +1,52 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2023 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.MRF.SoftwarePolicy do
+  @moduledoc "Filter activities depending on the software used"
+  @behaviour Pleroma.Web.ActivityPub.MRF.Policy
+
+  alias Pleroma.Instances.Instance
+
+  defp check_wildebeest(%URI{host: nil}, object), do: {:ok, object}
+
+  defp check_wildebeest(%URI{} = uri, object) do
+    instance_info = Instance.get_or_update_metadata(uri)
+
+    if instance_info && Map.get(instance_info, :software_name) == "wildebeest" do
+      {:reject, "[SoftwarePolicy] Cloudflare Wildebeest"}
+    else
+      {:ok, object}
+    end
+  end
+
+  @impl true
+  def filter(%{"id" => actor} = object) do
+    uri = URI.parse(actor)
+
+    with {:ok, object} <- check_wildebeest(uri, object) do
+      {:ok, object}
+    else
+      {:reject, nil} -> {:reject, "[SoftwarePolicy]"}
+      {:reject, _} = e -> e
+      _ -> {:reject, "[SoftwarePolicy]"}
+    end
+  end
+
+  def filter(object) when is_binary(object) do
+    uri = URI.parse(object)
+
+    with {:ok, object} <- check_wildebeest(uri, object) do
+      {:ok, object}
+    else
+      {:reject, nil} -> {:reject, "[SoftwarePolicy]"}
+      {:reject, _} = e -> e
+      _ -> {:reject, "[SoftwarePolicy]"}
+    end
+  end
+
+  def filter(object), do: {:ok, object}
+
+  @impl true
+  def describe, do: {:ok, %{}}
+end