+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
defmodule Pleroma.Web.ActivityPub.Transmogrifier do
@moduledoc """
A module to handle coding from internal to wire ActivityPub and back.
end
def get_actor(%{"actor" => actor}) when is_list(actor) do
- Enum.at(actor, 0)
+ if is_binary(Enum.at(actor, 0)) do
+ Enum.at(actor, 0)
+ else
+ Enum.find(actor, fn %{"type" => type} -> type in ["Person", "Service", "Application"] end)
+ |> Map.get("id")
+ end
+ end
+
+ def get_actor(%{"actor" => %{"id" => id}}) when is_bitstring(id) do
+ id
end
- def get_actor(%{"actor" => actor}) when is_map(actor) do
- actor["id"]
+ def get_actor(%{"actor" => nil, "attributedTo" => actor}) when not is_nil(actor) do
+ get_actor(%{"actor" => actor})
+ end
+
+ @doc """
+ Checks that an imported AP object's actor matches the domain it came from.
+ """
+ def contain_origin(_id, %{"actor" => nil}), do: :error
+
+ def contain_origin(id, %{"actor" => _actor} = params) do
+ id_uri = URI.parse(id)
+ actor_uri = URI.parse(get_actor(params))
+
+ if id_uri.host == actor_uri.host do
+ :ok
+ else
+ :error
+ end
end
- def get_actor(%{"actor" => actor_list}) do
- Enum.find(actor_list, fn %{"type" => type} -> type == "Person" end)
- |> Map.get("id")
+ def contain_origin_from_id(_id, %{"id" => nil}), do: :error
+
+ def contain_origin_from_id(id, %{"id" => other_id} = _params) do
+ id_uri = URI.parse(id)
+ other_uri = URI.parse(other_id)
+
+ if id_uri.host == other_uri.host do
+ :ok
+ else
+ :error
+ end
end
@doc """
def fix_object(object) do
object
|> fix_actor
+ |> fix_url
|> fix_attachments
|> fix_context
|> fix_in_reply_to
|> fix_emoji
|> fix_tag
|> fix_content_map
+ |> fix_likes
|> fix_addressing
end
|> Map.put("actor", get_actor(%{"actor" => actor}))
end
- def fix_in_reply_to(%{"inReplyTo" => in_reply_to_id} = object)
- when not is_nil(in_reply_to_id) do
- case ActivityPub.fetch_object_from_id(in_reply_to_id) do
+ def fix_likes(%{"likes" => likes} = object)
+ when is_bitstring(likes) do
+ # Check for standardisation
+ # This is what Peertube does
+ # curl -H 'Accept: application/activity+json' $likes | jq .totalItems
+ object
+ |> Map.put("likes", [])
+ |> Map.put("like_count", 0)
+ end
+
+ def fix_likes(object) do
+ object
+ end
+
+ def fix_in_reply_to(%{"inReplyTo" => in_reply_to} = object)
+ when not is_nil(in_reply_to) do
+ in_reply_to_id =
+ cond do
+ is_bitstring(in_reply_to) ->
+ in_reply_to
+
+ is_map(in_reply_to) && is_bitstring(in_reply_to["id"]) ->
+ in_reply_to["id"]
+
+ is_list(in_reply_to) && is_bitstring(Enum.at(in_reply_to, 0)) ->
+ Enum.at(in_reply_to, 0)
+
+ # Maybe I should output an error too?
+ true ->
+ ""
+ end
+
+ case fetch_obj_helper(in_reply_to_id) do
{:ok, replied_object} ->
with %Activity{} = activity <-
Activity.get_create_activity_by_object_ap_id(replied_object.data["id"]) do
|> Map.put("context", replied_object.data["context"] || object["conversation"])
else
e ->
- Logger.error("Couldn't fetch #{object["inReplyTo"]} #{inspect(e)}")
+ Logger.error("Couldn't fetch \"#{inspect(in_reply_to_id)}\", error: #{inspect(e)}")
object
end
e ->
- Logger.error("Couldn't fetch #{object["inReplyTo"]} #{inspect(e)}")
+ Logger.error("Couldn't fetch \"#{inspect(in_reply_to_id)}\", error: #{inspect(e)}")
object
end
end
def fix_in_reply_to(object), do: object
def fix_context(object) do
+ context = object["context"] || object["conversation"] || Utils.generate_context_id()
+
object
- |> Map.put("context", object["conversation"])
+ |> Map.put("context", context)
+ |> Map.put("conversation", context)
end
- def fix_attachments(object) do
+ def fix_attachments(%{"attachment" => attachment} = object) when is_list(attachment) do
attachments =
- (object["attachment"] || [])
+ attachment
|> Enum.map(fn data ->
- url = [%{"type" => "Link", "mediaType" => data["mediaType"], "href" => data["url"]}]
- Map.put(data, "url", url)
+ media_type = data["mediaType"] || data["mimeType"]
+ href = data["url"] || data["href"]
+
+ url = [%{"type" => "Link", "mediaType" => media_type, "href" => href}]
+
+ data
+ |> Map.put("mediaType", media_type)
+ |> Map.put("url", url)
end)
object
|> Map.put("attachment", attachments)
end
- def fix_emoji(object) do
- tags = object["tag"] || []
+ def fix_attachments(%{"attachment" => attachment} = object) when is_map(attachment) do
+ Map.put(object, "attachment", [attachment])
+ |> fix_attachments()
+ end
+
+ def fix_attachments(object), do: object
+
+ def fix_url(%{"url" => url} = object) when is_map(url) do
+ object
+ |> Map.put("url", url["href"])
+ end
+
+ def fix_url(%{"type" => "Video", "url" => url} = object) when is_list(url) do
+ first_element = Enum.at(url, 0)
+
+ link_element =
+ url
+ |> Enum.filter(fn x -> is_map(x) end)
+ |> Enum.filter(fn x -> x["mimeType"] == "text/html" end)
+ |> Enum.at(0)
+
+ object
+ |> Map.put("attachment", [first_element])
+ |> Map.put("url", link_element["href"])
+ end
+
+ def fix_url(%{"type" => object_type, "url" => url} = object)
+ when object_type != "Video" and is_list(url) do
+ first_element = Enum.at(url, 0)
+
+ url_string =
+ cond do
+ is_bitstring(first_element) -> first_element
+ is_map(first_element) -> first_element["href"] || ""
+ true -> ""
+ end
+
+ object
+ |> Map.put("url", url_string)
+ end
+
+ def fix_url(object), do: object
+
+ def fix_emoji(%{"tag" => tags} = object) when is_list(tags) do
emoji = tags |> Enum.filter(fn data -> data["type"] == "Emoji" and data["icon"] end)
emoji =
emoji
|> Enum.reduce(%{}, fn data, mapping ->
- name = data["name"]
-
- name =
- if String.starts_with?(name, ":") do
- name |> String.slice(1..-2)
- else
- name
- end
+ name = String.trim(data["name"], ":")
mapping |> Map.put(name, data["icon"]["url"])
end)
|> Map.put("emoji", emoji)
end
- def fix_tag(object) do
+ def fix_emoji(%{"tag" => %{"type" => "Emoji"} = tag} = object) do
+ name = String.trim(tag["name"], ":")
+ emoji = %{name => tag["icon"]["url"]}
+
+ object
+ |> Map.put("emoji", emoji)
+ end
+
+ def fix_emoji(object), do: object
+
+ def fix_tag(%{"tag" => tag} = object) when is_list(tag) do
tags =
- (object["tag"] || [])
+ tag
|> Enum.filter(fn data -> data["type"] == "Hashtag" and data["name"] end)
|> Enum.map(fn data -> String.slice(data["name"], 1..-1) end)
- combined = (object["tag"] || []) ++ tags
+ combined = tag ++ tags
+
+ object
+ |> Map.put("tag", combined)
+ end
+
+ def fix_tag(%{"tag" => %{"type" => "Hashtag", "name" => hashtag} = tag} = object) do
+ combined = [tag, String.slice(hashtag, 1..-1)]
object
|> Map.put("tag", combined)
end
+ def fix_tag(object), do: object
+
# content map usually only has one language so this will do for now.
def fix_content_map(%{"contentMap" => content_map} = object) do
content_groups = Map.to_list(content_map)
def fix_content_map(object), do: object
+ defp mastodon_follow_hack(%{"id" => id, "actor" => follower_id}, followed) do
+ with true <- id =~ "follows",
+ %User{local: true} = follower <- User.get_cached_by_ap_id(follower_id),
+ %Activity{} = activity <- Utils.fetch_latest_follow(follower, followed) do
+ {:ok, activity}
+ else
+ _ -> {:error, nil}
+ end
+ end
+
+ defp mastodon_follow_hack(_, _), do: {:error, nil}
+
+ defp get_follow_activity(follow_object, followed) do
+ with object_id when not is_nil(object_id) <- Utils.get_ap_id(follow_object),
+ {_, %Activity{} = activity} <- {:activity, Activity.get_by_ap_id(object_id)} do
+ {:ok, activity}
+ else
+ # Can't find the activity. This might a Mastodon 2.3 "Accept"
+ {:activity, nil} ->
+ mastodon_follow_hack(follow_object, followed)
+
+ _ ->
+ {:error, nil}
+ end
+ end
+
+ # disallow objects with bogus IDs
+ def handle_incoming(%{"id" => nil}), do: :error
+ def handle_incoming(%{"id" => ""}), do: :error
+ # length of https:// = 8, should validate better, but good enough for now.
+ def handle_incoming(%{"id" => id}) when not (is_binary(id) and length(id) > 8), do: :error
+
# TODO: validate those with a Ecto scheme
# - tags
# - emoji
def handle_incoming(%{"type" => "Create", "object" => %{"type" => objtype} = object} = data)
- when objtype in ["Article", "Note"] do
+ when objtype in ["Article", "Note", "Video", "Page"] do
actor = get_actor(data)
data =
end
end
- defp mastodon_follow_hack(%{"id" => id, "actor" => follower_id}, followed) do
- with true <- id =~ "follows",
- %User{local: true} = follower <- User.get_cached_by_ap_id(follower_id),
- %Activity{} = activity <- Utils.fetch_latest_follow(follower, followed) do
- {:ok, activity}
- else
- _ -> {:error, nil}
- end
- end
-
- defp mastodon_follow_hack(_), do: {:error, nil}
-
- defp get_follow_activity(follow_object, followed) do
- with object_id when not is_nil(object_id) <- Utils.get_ap_id(follow_object),
- {_, %Activity{} = activity} <- {:activity, Activity.get_by_ap_id(object_id)} do
- {:ok, activity}
- else
- # Can't find the activity. This might a Mastodon 2.3 "Accept"
- {:activity, nil} ->
- mastodon_follow_hack(follow_object, followed)
-
- _ ->
- {:error, nil}
- end
- end
-
def handle_incoming(
- %{"type" => "Accept", "object" => follow_object, "actor" => actor, "id" => id} = data
+ %{"type" => "Accept", "object" => follow_object, "actor" => _actor, "id" => _id} = data
) do
- with %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
+ with actor <- get_actor(data),
+ %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
{:ok, follow_activity} <- get_follow_activity(follow_object, followed),
+ {:ok, follow_activity} <- Utils.update_follow_state(follow_activity, "accept"),
%User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
{:ok, activity} <-
ActivityPub.accept(%{
local: false
}) do
if not User.following?(follower, followed) do
- {:ok, follower} = User.follow(follower, followed)
+ {:ok, _follower} = User.follow(follower, followed)
end
{:ok, activity}
end
def handle_incoming(
- %{"type" => "Reject", "object" => follow_object, "actor" => actor, "id" => id} = data
+ %{"type" => "Reject", "object" => follow_object, "actor" => _actor, "id" => _id} = data
) do
- with %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
+ with actor <- get_actor(data),
+ %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
{:ok, follow_activity} <- get_follow_activity(follow_object, followed),
+ {:ok, follow_activity} <- Utils.update_follow_state(follow_activity, "reject"),
%User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
{:ok, activity} <-
ActivityPub.accept(%{
end
def handle_incoming(
- %{"type" => "Like", "object" => object_id, "actor" => actor, "id" => id} = _data
+ %{"type" => "Like", "object" => object_id, "actor" => _actor, "id" => id} = data
) do
- with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
- {:ok, object} <-
- get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
+ with actor <- get_actor(data),
+ %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
+ {:ok, object} <- get_obj_helper(object_id) || fetch_obj_helper(object_id),
{:ok, activity, _object} <- ActivityPub.like(actor, object, id, false) do
{:ok, activity}
else
end
def handle_incoming(
- %{"type" => "Announce", "object" => object_id, "actor" => actor, "id" => id} = _data
+ %{"type" => "Announce", "object" => object_id, "actor" => _actor, "id" => id} = data
) do
- with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
- {:ok, object} <-
- get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
+ with actor <- get_actor(data),
+ %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
+ {:ok, object} <- get_obj_helper(object_id) || fetch_obj_helper(object_id),
{:ok, activity, _object} <- ActivityPub.announce(actor, object, id, false) do
{:ok, activity}
else
end
def handle_incoming(
- %{"type" => "Update", "object" => %{"type" => "Person"} = object, "actor" => actor_id} =
+ %{"type" => "Update", "object" => %{"type" => object_type} = object, "actor" => actor_id} =
data
- ) do
+ )
+ when object_type in ["Person", "Application", "Service", "Organization"] do
with %User{ap_id: ^actor_id} = actor <- User.get_by_ap_id(object["id"]) do
{:ok, new_user_data} = ActivityPub.user_data_from_user_object(object)
update_data =
new_user_data
|> Map.take([:name, :bio, :avatar])
- |> Map.put(:info, Map.merge(actor.info, %{"banner" => banner, "locked" => locked}))
+ |> Map.put(:info, %{"banner" => banner, "locked" => locked})
actor
|> User.upgrade_changeset(update_data)
end
end
- # TODO: Make secure.
+ # TODO: We presently assume that any actor on the same origin domain as the object being
+ # deleted has the rights to delete that object. A better way to validate whether or not
+ # the object should be deleted is to refetch the object URI, which should return either
+ # an error or a tombstone. This would allow us to verify that a deletion actually took
+ # place.
def handle_incoming(
- %{"type" => "Delete", "object" => object_id, "actor" => actor, "id" => _id} = _data
+ %{"type" => "Delete", "object" => object_id, "actor" => _actor, "id" => _id} = data
) do
object_id = Utils.get_ap_id(object_id)
- with %User{} = _actor <- User.get_or_fetch_by_ap_id(actor),
- {:ok, object} <-
- get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
+ with actor <- get_actor(data),
+ %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
+ {:ok, object} <- get_obj_helper(object_id) || fetch_obj_helper(object_id),
+ :ok <- contain_origin(actor.ap_id, object.data),
{:ok, activity} <- ActivityPub.delete(object, false) do
{:ok, activity}
else
%{
"type" => "Undo",
"object" => %{"type" => "Announce", "object" => object_id},
- "actor" => actor,
+ "actor" => _actor,
"id" => id
- } = _data
+ } = data
) do
- with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
- {:ok, object} <-
- get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
+ with actor <- get_actor(data),
+ %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
+ {:ok, object} <- get_obj_helper(object_id) || fetch_obj_helper(object_id),
{:ok, activity, _} <- ActivityPub.unannounce(actor, object, id, false) do
{:ok, activity}
else
User.unfollow(follower, followed)
{:ok, activity}
else
- e -> :error
+ _e -> :error
end
end
- @ap_config Application.get_env(:pleroma, :activitypub)
- @accept_blocks Keyword.get(@ap_config, :accept_blocks)
-
def handle_incoming(
%{
"type" => "Undo",
"id" => id
} = _data
) do
- with true <- @accept_blocks,
+ with true <- Pleroma.Config.get([:activitypub, :accept_blocks]),
%User{local: true} = blocked <- User.get_cached_by_ap_id(blocked),
%User{} = blocker <- User.get_or_fetch_by_ap_id(blocker),
{:ok, activity} <- ActivityPub.unblock(blocker, blocked, id, false) do
User.unblock(blocker, blocked)
{:ok, activity}
else
- e -> :error
+ _e -> :error
end
end
def handle_incoming(
- %{"type" => "Block", "object" => blocked, "actor" => blocker, "id" => id} = data
+ %{"type" => "Block", "object" => blocked, "actor" => blocker, "id" => id} = _data
) do
- with true <- @accept_blocks,
+ with true <- Pleroma.Config.get([:activitypub, :accept_blocks]),
%User{local: true} = blocked = User.get_cached_by_ap_id(blocked),
%User{} = blocker = User.get_or_fetch_by_ap_id(blocker),
{:ok, activity} <- ActivityPub.block(blocker, blocked, id, false) do
User.block(blocker, blocked)
{:ok, activity}
else
- e -> :error
+ _e -> :error
end
end
%{
"type" => "Undo",
"object" => %{"type" => "Like", "object" => object_id},
- "actor" => actor,
+ "actor" => _actor,
"id" => id
- } = _data
+ } = data
) do
- with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
- {:ok, object} <-
- get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
+ with actor <- get_actor(data),
+ %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
+ {:ok, object} <- get_obj_helper(object_id) || fetch_obj_helper(object_id),
{:ok, activity, _, _} <- ActivityPub.unlike(actor, object, id, false) do
{:ok, activity}
else
def handle_incoming(_), do: :error
+ def fetch_obj_helper(id) when is_bitstring(id), do: ActivityPub.fetch_object_from_id(id)
+ def fetch_obj_helper(obj) when is_map(obj), do: ActivityPub.fetch_object_from_id(obj["id"])
+
def get_obj_helper(id) do
if object = Object.normalize(id), do: {:ok, object}, else: nil
end
|> prepare_attachments
|> set_conversation
|> set_reply_to_uri
+ |> strip_internal_fields
+ |> strip_internal_tags
end
# @doc
data =
data
|> Map.put("object", object)
- |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
+ |> Map.merge(Utils.make_json_ld_header())
{:ok, data}
end
data =
data
|> Map.put("object", object)
- |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
+ |> Map.merge(Utils.make_json_ld_header())
{:ok, data}
end
data =
data
|> Map.put("object", object)
- |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
+ |> Map.merge(Utils.make_json_ld_header())
{:ok, data}
end
data =
data
|> maybe_fix_object_url
- |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
+ |> Map.merge(Utils.make_json_ld_header())
{:ok, data}
end
def maybe_fix_object_url(data) do
if is_binary(data["object"]) and not String.starts_with?(data["object"], "http") do
- case ActivityPub.fetch_object_from_id(data["object"]) do
+ case fetch_obj_helper(data["object"]) do
{:ok, relative_object} ->
if relative_object.data["external_url"] do
_data =
end
def add_mention_tags(object) do
- recipients = object["to"] ++ (object["cc"] || [])
-
mentions =
- recipients
- |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
- |> Enum.filter(& &1)
+ object
+ |> Utils.get_notified_from_object()
|> Enum.map(fn user ->
%{"type" => "Mention", "href" => user.ap_id, "name" => "@#{user.nickname}"}
end)
|> Map.put("attachment", attachments)
end
+ defp strip_internal_fields(object) do
+ object
+ |> Map.drop([
+ "likes",
+ "like_count",
+ "announcements",
+ "announcement_count",
+ "emoji",
+ "context_id"
+ ])
+ end
+
+ defp strip_internal_tags(%{"tag" => tags} = object) do
+ tags =
+ tags
+ |> Enum.filter(fn x -> is_map(x) end)
+
+ object
+ |> Map.put("tag", tags)
+ end
+
+ defp strip_internal_tags(object), do: object
+
defp user_upgrade_task(user) do
old_follower_address = User.ap_followers(user)
def upgrade_user_from_ap_id(ap_id, async \\ true) do
with %User{local: false} = user <- User.get_by_ap_id(ap_id),
{:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id) do
- data =
- data
- |> Map.put(:info, Map.merge(user.info, data[:info]))
-
already_ap = User.ap_enabled?(user)
{:ok, user} =
projects / akkoma / blobdiff