1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
5 defmodule Pleroma.Web.ActivityPub.Publisher do
9 alias Pleroma.Instances
11 alias Pleroma.Web.ActivityPub.Relay
12 alias Pleroma.Web.ActivityPub.Transmogrifier
14 import Pleroma.Web.ActivityPub.Visibility
16 @behaviour Pleroma.Web.Federator.Publisher
21 ActivityPub outgoing federation module.
25 Determine if an activity can be represented by running it through Transmogrifier.
27 def is_representable?(%Activity{} = activity) do
28 with {:ok, _data} <- Transmogrifier.prepare_outgoing(activity.data) do
37 Publish a single message to a peer. Takes a struct with the following
40 * `inbox`: the inbox to publish to
41 * `json`: the JSON message body representing the ActivityPub message
42 * `actor`: the actor which is signing the message
43 * `id`: the ActivityStreams URI of the message
45 def publish_one(%{inbox: inbox, json: json, actor: %User{} = actor, id: id} = params) do
46 Logger.info("Federating #{id} to #{inbox}")
47 host = URI.parse(inbox).host
49 digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
52 NaiveDateTime.utc_now()
53 |> Timex.format!("{WDshort}, {0D} {Mshort} {YYYY} {h24}:{m}:{s} GMT")
56 Pleroma.Signature.sign(actor, %{
58 "content-length": byte_size(json),
63 with {:ok, %{status: code}} when code in 200..299 <-
69 {"Content-Type", "application/activity+json"},
71 {"signature", signature},
75 if !Map.has_key?(params, :unreachable_since) || params[:unreachable_since],
76 do: Instances.set_reachable(inbox)
80 {_post_result, response} ->
81 unless params[:unreachable_since], do: Instances.set_unreachable(inbox)
86 defp should_federate?(inbox, public) do
90 inbox_info = URI.parse(inbox)
91 !Enum.member?(Config.get([:instance, :quarantined_instances], []), inbox_info.host)
95 defp recipients(actor, activity) do
97 if actor.follower_address in activity.recipients do
98 {:ok, followers} = User.get_followers(actor)
99 Enum.filter(followers, &(!&1.local))
104 Pleroma.Web.Salmon.remote_users(actor, activity) ++ followers
107 defp get_cc_ap_ids(ap_id, recipients) do
108 host = Map.get(URI.parse(ap_id), :host)
111 |> Enum.filter(fn %User{ap_id: ap_id} -> Map.get(URI.parse(ap_id), :host) == host end)
112 |> Enum.map(& &1.ap_id)
116 Publishes an activity with BCC to all relevant peers.
119 def publish(actor, %{data: %{"bcc" => bcc}} = activity) when is_list(bcc) and bcc != [] do
120 public = is_public?(activity)
121 {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
123 recipients = recipients(actor, activity)
126 |> Enum.filter(&User.ap_enabled?/1)
127 |> Enum.map(fn %{info: %{source_data: data}} -> data["inbox"] end)
128 |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
129 |> Instances.filter_reachable()
130 |> Enum.each(fn {inbox, unreachable_since} ->
131 %User{ap_id: ap_id} =
132 Enum.find(recipients, fn %{info: %{source_data: data}} -> data["inbox"] == inbox end)
134 # Get all the recipients on the same host and add them to cc. Otherwise, a remote
135 # instance would only accept a first message for the first recipient and ignore the rest.
136 cc = get_cc_ap_ids(ap_id, recipients)
143 Pleroma.Web.Federator.Publisher.enqueue_one(__MODULE__, %{
147 id: activity.data["id"],
148 unreachable_since: unreachable_since
154 Publishes an activity to all relevant peers.
156 def publish(%User{} = actor, %Activity{} = activity) do
157 public = is_public?(activity)
159 if public && Config.get([:instance, :allow_relay]) do
160 Logger.info(fn -> "Relaying #{activity.data["id"]} out" end)
161 Relay.publish(activity)
164 {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
165 json = Jason.encode!(data)
167 recipients(actor, activity)
168 |> Enum.filter(fn user -> User.ap_enabled?(user) end)
169 |> Enum.map(fn %{info: %{source_data: data}} ->
170 (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
173 |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
174 |> Instances.filter_reachable()
175 |> Enum.each(fn {inbox, unreachable_since} ->
176 Pleroma.Web.Federator.Publisher.enqueue_one(
182 id: activity.data["id"],
183 unreachable_since: unreachable_since
189 def gather_webfinger_links(%User{} = user) do
191 %{"rel" => "self", "type" => "application/activity+json", "href" => user.ap_id},
194 "type" => "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"",
200 def gather_nodeinfo_protocol_names, do: ["activitypub"]