2019-05-12 03:09:05 +00:00
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# Pleroma: A lightweight social networking server
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2023-01-02 20:38:50 +00:00
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# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
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2019-05-12 03:09:05 +00:00
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.ActivityPub.Publisher do
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alias Pleroma.Activity
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2019-05-12 04:00:55 +00:00
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alias Pleroma.Config
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2019-09-13 08:36:49 +00:00
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alias Pleroma.Delivery
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2019-05-25 04:24:21 +00:00
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alias Pleroma.HTTP
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2019-05-12 03:09:05 +00:00
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alias Pleroma.Instances
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2019-09-13 08:36:49 +00:00
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alias Pleroma.Object
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2019-12-13 11:27:10 +00:00
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alias Pleroma.Repo
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2019-05-12 03:09:05 +00:00
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alias Pleroma.User
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2019-05-12 04:00:55 +00:00
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alias Pleroma.Web.ActivityPub.Relay
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2019-05-12 03:09:05 +00:00
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alias Pleroma.Web.ActivityPub.Transmogrifier
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2023-12-28 19:53:09 +00:00
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alias Pleroma.Workers.PublisherWorker
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2019-05-12 03:09:05 +00:00
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2019-07-29 02:43:19 +00:00
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require Pleroma.Constants
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2019-05-12 03:09:05 +00:00
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import Pleroma.Web.ActivityPub.Visibility
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require Logger
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@moduledoc """
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ActivityPub outgoing federation module.
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"""
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2023-12-28 19:53:09 +00:00
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@doc """
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Enqueue publishing a single activity.
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"""
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@spec enqueue_one(Map.t(), Keyword.t()) :: {:ok, %Oban.Job{}}
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def enqueue_one(%{} = params, worker_args \\ []) do
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PublisherWorker.enqueue(
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"publish_one",
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%{"params" => params},
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worker_args
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)
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end
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@doc """
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Gathers a set of remote users given an IR envelope.
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"""
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def remote_users(%User{id: user_id}, %{data: %{"to" => to} = data}) do
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cc = Map.get(data, "cc", [])
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bcc =
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data
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|> Map.get("bcc", [])
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|> Enum.reduce([], fn ap_id, bcc ->
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case Pleroma.List.get_by_ap_id(ap_id) do
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%Pleroma.List{user_id: ^user_id} = list ->
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{:ok, following} = Pleroma.List.get_following(list)
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bcc ++ Enum.map(following, & &1.ap_id)
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_ ->
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bcc
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end
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end)
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[to, cc, bcc]
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|> Enum.concat()
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|> Enum.map(&User.get_cached_by_ap_id/1)
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|> Enum.filter(fn user -> user && !user.local end)
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end
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2019-05-12 03:09:05 +00:00
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@doc """
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Determine if an activity can be represented by running it through Transmogrifier.
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"""
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def is_representable?(%Activity{} = activity) do
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2019-05-12 05:01:00 +00:00
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with {:ok, _data} <- Transmogrifier.prepare_outgoing(activity.data) do
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2019-05-12 03:09:05 +00:00
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true
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else
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_e ->
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false
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2019-05-12 03:09:05 +00:00
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end
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end
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@doc """
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Publish a single message to a peer. Takes a struct with the following
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parameters set:
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* `inbox`: the inbox to publish to
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* `json`: the JSON message body representing the ActivityPub message
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* `actor`: the actor which is signing the message
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* `id`: the ActivityStreams URI of the message
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"""
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def publish_one(%{inbox: inbox, json: json, actor: %User{} = actor, id: id} = params) do
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2019-12-10 08:08:57 +00:00
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Logger.debug("Federating #{id} to #{inbox}")
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2020-09-18 11:58:22 +00:00
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uri = %{path: path} = URI.parse(inbox)
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digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
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2019-08-22 19:39:06 +00:00
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date = Pleroma.Signature.signed_date()
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2019-05-12 03:09:05 +00:00
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signature =
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2019-05-14 20:03:13 +00:00
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Pleroma.Signature.sign(actor, %{
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2020-09-18 11:58:22 +00:00
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"(request-target)": "post #{path}",
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host: signature_host(uri),
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"content-length": byte_size(json),
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digest: digest,
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date: date
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})
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2021-12-07 08:18:53 +00:00
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with {:ok, %{status: code}} = result when code in 200..299 <-
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2021-12-07 17:12:23 +00:00
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HTTP.post(
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inbox,
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json,
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[
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{"Content-Type", "application/activity+json"},
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{"Date", date},
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{"signature", signature},
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{"digest", digest}
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]
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) do
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2020-07-14 18:44:08 +00:00
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if not Map.has_key?(params, :unreachable_since) || params[:unreachable_since] do
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Instances.set_reachable(inbox)
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end
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2019-05-12 03:09:05 +00:00
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result
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else
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{_post_result, %{status: code} = response} = e ->
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unless params[:unreachable_since], do: Instances.set_unreachable(inbox)
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2023-12-29 05:25:11 +00:00
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Logger.metadata(activity: id, inbox: inbox, status: code)
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Logger.error("Publisher failed to inbox #{inbox} with status #{code}")
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2023-12-29 05:25:33 +00:00
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case response do
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%{status: 403} -> {:discard, :forbidden}
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2023-12-29 05:31:05 +00:00
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%{status: 404} -> {:discard, :not_found}
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%{status: 410} -> {:discard, :not_found}
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2023-12-29 06:04:05 +00:00
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_ -> {:error, e}
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2023-12-29 05:25:33 +00:00
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end
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2023-12-29 17:18:23 +00:00
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e ->
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unless params[:unreachable_since], do: Instances.set_unreachable(inbox)
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Logger.metadata(activity: id, inbox: inbox)
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Logger.error("Publisher failed to inbox #{inbox} #{inspect(e)}")
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{:error, e}
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2019-05-12 03:09:05 +00:00
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end
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end
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2020-11-17 14:28:30 +00:00
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def publish_one(%{actor_id: actor_id} = params) do
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actor = User.get_cached_by_id(actor_id)
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params
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|> Map.delete(:actor_id)
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|> Map.put(:actor, actor)
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|> publish_one()
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end
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2020-07-14 18:44:08 +00:00
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defp signature_host(%URI{port: port, scheme: scheme, host: host}) do
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if port == URI.default_port(scheme) do
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host
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else
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"#{host}:#{port}"
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end
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end
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2019-05-12 03:09:05 +00:00
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defp should_federate?(inbox, public) do
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if public do
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true
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else
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2019-07-22 14:33:58 +00:00
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%{host: host} = URI.parse(inbox)
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quarantined_instances =
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Config.get([:instance, :quarantined_instances], [])
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2020-10-02 12:51:39 +00:00
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|> Pleroma.Web.ActivityPub.MRF.instance_list_from_tuples()
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|> Pleroma.Web.ActivityPub.MRF.subdomains_regex()
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!Pleroma.Web.ActivityPub.MRF.subdomain_match?(quarantined_instances, host)
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2019-05-12 03:09:05 +00:00
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end
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end
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2023-12-17 07:15:58 +00:00
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@spec recipients(User.t(), Activity.t()) :: [[User.t()]]
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defp recipients(actor, activity) do
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followers =
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if actor.follower_address in activity.recipients do
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User.get_external_followers(actor)
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else
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[]
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end
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2019-09-13 08:36:49 +00:00
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fetchers =
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with %Activity{data: %{"type" => "Delete"}} <- activity,
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%Object{id: object_id} <- Object.normalize(activity, fetch: false),
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2019-09-13 08:36:49 +00:00
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fetchers <- User.get_delivered_users_by_object_id(object_id),
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_ <- Delivery.delete_all_by_object_id(object_id) do
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fetchers
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else
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_ ->
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[]
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end
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2023-12-28 19:53:09 +00:00
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mentioned = remote_users(actor, activity)
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2023-12-16 16:26:08 +00:00
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non_mentioned = (followers ++ fetchers) -- mentioned
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2023-12-17 07:15:58 +00:00
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[mentioned, non_mentioned]
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2019-05-14 12:00:07 +00:00
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end
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defp get_cc_ap_ids(ap_id, recipients) do
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host = Map.get(URI.parse(ap_id), :host)
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recipients
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|> Enum.filter(fn %User{ap_id: ap_id} -> Map.get(URI.parse(ap_id), :host) == host end)
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|> Enum.map(& &1.ap_id)
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end
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2020-04-01 05:47:07 +00:00
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defp maybe_use_sharedinbox(%User{shared_inbox: nil, inbox: inbox}), do: inbox
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defp maybe_use_sharedinbox(%User{shared_inbox: shared_inbox}), do: shared_inbox
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2019-07-22 02:18:45 +00:00
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@doc """
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Determine a user inbox to use based on heuristics. These heuristics
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are based on an approximation of the ``sharedInbox`` rules in the
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[ActivityPub specification][ap-sharedinbox].
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Please do not edit this function (or its children) without reading
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the spec, as editing the code is likely to introduce some breakage
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without some familiarity.
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[ap-sharedinbox]: https://www.w3.org/TR/activitypub/#shared-inbox-delivery
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"""
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def determine_inbox(
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%Activity{data: activity_data},
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2020-04-01 05:47:07 +00:00
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%User{inbox: inbox} = user
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) do
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to = activity_data["to"] || []
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cc = activity_data["cc"] || []
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type = activity_data["type"]
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cond do
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type == "Delete" ->
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maybe_use_sharedinbox(user)
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2019-07-29 02:43:19 +00:00
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Pleroma.Constants.as_public() in to || Pleroma.Constants.as_public() in cc ->
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2019-07-22 02:18:45 +00:00
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maybe_use_sharedinbox(user)
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length(to) + length(cc) > 1 ->
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maybe_use_sharedinbox(user)
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true ->
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2020-04-01 05:47:07 +00:00
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inbox
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2019-07-22 02:18:45 +00:00
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end
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end
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2019-05-14 12:00:07 +00:00
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@doc """
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Publishes an activity with BCC to all relevant peers.
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"""
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2019-08-01 14:28:00 +00:00
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def publish(%User{} = actor, %{data: %{"bcc" => bcc}} = activity)
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when is_list(bcc) and bcc != [] do
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2019-05-14 12:00:07 +00:00
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public = is_public?(activity)
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{:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
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2023-12-17 07:15:58 +00:00
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[priority_recipients, recipients] = recipients(actor, activity)
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2019-05-14 12:00:07 +00:00
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2019-12-13 11:27:10 +00:00
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inboxes =
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2023-12-16 16:26:08 +00:00
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[priority_recipients, recipients]
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|> Enum.map(fn recipients ->
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recipients
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2024-01-11 17:38:12 +00:00
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|> Enum.map(fn %User{} = user ->
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determine_inbox(activity, user)
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end)
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|> Enum.uniq()
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2023-12-16 16:26:08 +00:00
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|> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
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|> Instances.filter_reachable()
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end)
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2019-12-13 11:27:10 +00:00
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Repo.checkout(fn ->
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2023-12-16 16:26:08 +00:00
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Enum.each(inboxes, fn inboxes ->
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Enum.each(inboxes, fn {inbox, unreachable_since} ->
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%User{ap_id: ap_id} = Enum.find(recipients, fn actor -> actor.inbox == inbox end)
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# Get all the recipients on the same host and add them to cc. Otherwise, a remote
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# instance would only accept a first message for the first recipient and ignore the rest.
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cc = get_cc_ap_ids(ap_id, recipients)
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json =
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data
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|> Map.put("cc", cc)
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|> Jason.encode!()
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2023-12-28 19:53:09 +00:00
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__MODULE__.enqueue_one(%{
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inbox: inbox,
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json: json,
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actor_id: actor.id,
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id: activity.data["id"],
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unreachable_since: unreachable_since
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})
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end)
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2019-12-13 11:27:10 +00:00
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end)
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2019-05-14 12:00:07 +00:00
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end)
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end
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2020-10-07 14:58:45 +00:00
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# Publishes an activity to all relevant peers.
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2019-05-14 12:00:07 +00:00
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def publish(%User{} = actor, %Activity{} = activity) do
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2019-05-12 03:09:05 +00:00
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public = is_public?(activity)
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2019-05-12 04:00:55 +00:00
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if public && Config.get([:instance, :allow_relay]) do
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2019-12-11 10:46:07 +00:00
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Logger.debug(fn -> "Relaying #{activity.data["id"]} out" end)
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2019-05-12 04:00:55 +00:00
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Relay.publish(activity)
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end
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2019-05-12 03:09:05 +00:00
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{:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
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json = Jason.encode!(data)
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2023-12-17 07:15:58 +00:00
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[priority_inboxes, inboxes] =
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recipients(actor, activity)
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|> Enum.map(fn recipients ->
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recipients
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2024-01-11 17:38:12 +00:00
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|> Enum.map(fn %User{} = user ->
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|
|
determine_inbox(activity, user)
|
|
|
|
end)
|
|
|
|
|> Enum.uniq()
|
2023-12-17 07:15:58 +00:00
|
|
|
|> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
|
2023-12-16 16:26:08 +00:00
|
|
|
end)
|
2023-12-17 07:15:58 +00:00
|
|
|
|
|
|
|
inboxes = inboxes -- priority_inboxes
|
|
|
|
|
|
|
|
[{priority_inboxes, 0}, {inboxes, 1}]
|
|
|
|
|> Enum.each(fn {inboxes, priority} ->
|
|
|
|
inboxes
|
2023-12-16 16:26:08 +00:00
|
|
|
|> Instances.filter_reachable()
|
|
|
|
|> Enum.each(fn {inbox, unreachable_since} ->
|
2023-12-28 19:53:09 +00:00
|
|
|
__MODULE__.enqueue_one(
|
2023-12-16 16:26:08 +00:00
|
|
|
%{
|
|
|
|
inbox: inbox,
|
|
|
|
json: json,
|
|
|
|
actor_id: actor.id,
|
|
|
|
id: activity.data["id"],
|
|
|
|
unreachable_since: unreachable_since
|
|
|
|
},
|
|
|
|
priority: priority
|
|
|
|
)
|
|
|
|
end)
|
2019-05-12 03:09:05 +00:00
|
|
|
end)
|
2023-12-16 16:26:08 +00:00
|
|
|
|
|
|
|
:ok
|
2019-05-12 03:09:05 +00:00
|
|
|
end
|
2019-05-12 19:05:03 +00:00
|
|
|
|
|
|
|
def gather_webfinger_links(%User{} = user) do
|
|
|
|
[
|
|
|
|
%{"rel" => "self", "type" => "application/activity+json", "href" => user.ap_id},
|
|
|
|
%{
|
|
|
|
"rel" => "self",
|
|
|
|
"type" => "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"",
|
|
|
|
"href" => user.ap_id
|
2019-12-20 13:33:44 +00:00
|
|
|
},
|
|
|
|
%{
|
|
|
|
"rel" => "http://ostatus.org/schema/1.0/subscribe",
|
2021-05-31 20:09:11 +00:00
|
|
|
"template" => "#{Pleroma.Web.Endpoint.url()}/ostatus_subscribe?acct={uri}"
|
2019-05-12 19:05:03 +00:00
|
|
|
}
|
|
|
|
]
|
|
|
|
end
|
2019-05-12 19:15:29 +00:00
|
|
|
|
|
|
|
def gather_nodeinfo_protocol_names, do: ["activitypub"]
|
2019-05-12 03:09:05 +00:00
|
|
|
end
|