152 lines
4.3 KiB
Elixir
152 lines
4.3 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
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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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alias Pleroma.Config
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alias Pleroma.HTTP
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alias Pleroma.Instances
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alias Pleroma.User
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alias Pleroma.Web.ActivityPub.Relay
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alias Pleroma.Web.ActivityPub.Transmogrifier
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import Pleroma.Web.ActivityPub.Visibility
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@behaviour Pleroma.Web.Federator.Publisher
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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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@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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with {:ok, _data} <- Transmogrifier.prepare_outgoing(activity.data) do
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true
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else
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_e ->
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false
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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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Logger.info("Federating #{id} to #{inbox}")
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host = URI.parse(inbox).host
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digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
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date =
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NaiveDateTime.utc_now()
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|> Timex.format!("{WDshort}, {0D} {Mshort} {YYYY} {h24}:{m}:{s} GMT")
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signature =
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Pleroma.Signature.sign(actor, %{
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host: host,
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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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with {:ok, %{status: code}} when code in 200..299 <-
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result =
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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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if !Map.has_key?(params, :unreachable_since) || params[:unreachable_since],
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do: Instances.set_reachable(inbox)
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result
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else
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{_post_result, response} ->
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unless params[:unreachable_since], do: Instances.set_unreachable(inbox)
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{:error, response}
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end
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end
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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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inbox_info = URI.parse(inbox)
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!Enum.member?(Config.get([:instance, :quarantined_instances], []), inbox_info.host)
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end
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end
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@doc """
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Publishes an activity to all relevant peers.
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"""
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def publish(%User{} = actor, %Activity{} = activity) do
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remote_followers =
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if actor.follower_address in activity.recipients do
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{:ok, followers} = User.get_followers(actor)
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followers |> Enum.filter(&(!&1.local))
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else
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[]
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end
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public = is_public?(activity)
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if public && Config.get([:instance, :allow_relay]) do
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Logger.info(fn -> "Relaying #{activity.data["id"]} out" end)
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Relay.publish(activity)
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end
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{:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
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json = Jason.encode!(data)
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(Pleroma.Web.Salmon.remote_users(activity) ++ remote_followers)
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|> Enum.filter(fn user -> User.ap_enabled?(user) end)
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|> Enum.map(fn %{info: %{source_data: data}} ->
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(is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
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end)
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|> Enum.uniq()
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|> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
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|> Instances.filter_reachable()
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|> Enum.each(fn {inbox, unreachable_since} ->
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Pleroma.Web.Federator.Publisher.enqueue_one(
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__MODULE__,
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%{
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inbox: inbox,
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json: json,
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actor: actor,
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id: activity.data["id"],
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unreachable_since: unreachable_since
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}
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)
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end)
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end
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def gather_webfinger_links(%User{} = user) do
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[
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%{"rel" => "self", "type" => "application/activity+json", "href" => user.ap_id},
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%{
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"rel" => "self",
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"type" => "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"",
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"href" => user.ap_id
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}
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]
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end
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def gather_nodeinfo_protocol_names, do: ["activitypub"]
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end
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