distraction.party/lib/pleroma/web/activity_pub/activity_pub_controller.ex

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# Pleroma: A lightweight social networking server
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# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.ActivityPub.ActivityPubController do
use Pleroma.Web, :controller
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alias Pleroma.Activity
alias Pleroma.Object
alias Pleroma.Object.Fetcher
alias Pleroma.User
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alias Pleroma.Web.ActivityPub.ActivityPub
alias Pleroma.Web.ActivityPub.InternalFetchActor
alias Pleroma.Web.ActivityPub.ObjectView
alias Pleroma.Web.ActivityPub.Relay
alias Pleroma.Web.ActivityPub.Transmogrifier
alias Pleroma.Web.ActivityPub.UserView
alias Pleroma.Web.ActivityPub.Utils
alias Pleroma.Web.ActivityPub.Visibility
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alias Pleroma.Web.Federator
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require Logger
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action_fallback(:errors)
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plug(Pleroma.Web.FederatingPlug when action in [:inbox, :relay])
plug(:set_requester_reachable when action in [:inbox])
plug(:relay_active? when action in [:relay])
def relay_active?(conn, _) do
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if Pleroma.Config.get([:instance, :allow_relay]) do
conn
else
conn
|> render_error(:not_found, "not found")
|> halt()
end
end
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def user(conn, %{"nickname" => nickname}) do
with %User{} = user <- User.get_cached_by_nickname(nickname),
{:ok, user} <- User.ensure_keys_present(user) do
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conn
|> put_resp_header("content-type", "application/activity+json")
|> json(UserView.render("user.json", %{user: user}))
else
nil -> {:error, :not_found}
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end
end
def object(conn, %{"uuid" => uuid}) do
with ap_id <- o_status_url(conn, :object, uuid),
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%Object{} = object <- Object.get_cached_by_ap_id(ap_id),
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{_, true} <- {:public?, Visibility.is_public?(object)} do
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conn
|> put_resp_header("content-type", "application/activity+json")
|> json(ObjectView.render("object.json", %{object: object}))
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else
{:public?, false} ->
{:error, :not_found}
end
end
def object_likes(conn, %{"uuid" => uuid, "page" => page}) do
with ap_id <- o_status_url(conn, :object, uuid),
%Object{} = object <- Object.get_cached_by_ap_id(ap_id),
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{_, true} <- {:public?, Visibility.is_public?(object)},
likes <- Utils.get_object_likes(object) do
{page, _} = Integer.parse(page)
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(ObjectView.render("likes.json", ap_id, likes, page))
else
{:public?, false} ->
{:error, :not_found}
end
end
def object_likes(conn, %{"uuid" => uuid}) do
with ap_id <- o_status_url(conn, :object, uuid),
%Object{} = object <- Object.get_cached_by_ap_id(ap_id),
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{_, true} <- {:public?, Visibility.is_public?(object)},
likes <- Utils.get_object_likes(object) do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(ObjectView.render("likes.json", ap_id, likes))
else
{:public?, false} ->
{:error, :not_found}
end
end
def activity(conn, %{"uuid" => uuid}) do
with ap_id <- o_status_url(conn, :activity, uuid),
%Activity{} = activity <- Activity.normalize(ap_id),
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{_, true} <- {:public?, Visibility.is_public?(activity)} do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(ObjectView.render("object.json", %{object: activity}))
else
{:public?, false} ->
{:error, :not_found}
end
end
def following(%{assigns: %{user: for_user}} = conn, %{"nickname" => nickname, "page" => page}) do
with %User{} = user <- User.get_cached_by_nickname(nickname),
{user, for_user} <- ensure_user_keys_present_and_maybe_refresh_for_user(user, for_user),
{:show_follows, true} <-
{:show_follows, (for_user && for_user == user) || !user.info.hide_follows} do
{page, _} = Integer.parse(page)
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conn
|> put_resp_header("content-type", "application/activity+json")
|> json(UserView.render("following.json", %{user: user, page: page, for: for_user}))
else
{:show_follows, _} ->
conn
|> put_resp_header("content-type", "application/activity+json")
|> send_resp(403, "")
end
end
def following(%{assigns: %{user: for_user}} = conn, %{"nickname" => nickname}) do
with %User{} = user <- User.get_cached_by_nickname(nickname),
{user, for_user} <- ensure_user_keys_present_and_maybe_refresh_for_user(user, for_user) do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(UserView.render("following.json", %{user: user, for: for_user}))
end
end
def followers(%{assigns: %{user: for_user}} = conn, %{"nickname" => nickname, "page" => page}) do
with %User{} = user <- User.get_cached_by_nickname(nickname),
{user, for_user} <- ensure_user_keys_present_and_maybe_refresh_for_user(user, for_user),
{:show_followers, true} <-
{:show_followers, (for_user && for_user == user) || !user.info.hide_followers} do
{page, _} = Integer.parse(page)
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conn
|> put_resp_header("content-type", "application/activity+json")
|> json(UserView.render("followers.json", %{user: user, page: page, for: for_user}))
else
{:show_followers, _} ->
conn
|> put_resp_header("content-type", "application/activity+json")
|> send_resp(403, "")
end
end
def followers(%{assigns: %{user: for_user}} = conn, %{"nickname" => nickname}) do
with %User{} = user <- User.get_cached_by_nickname(nickname),
{user, for_user} <- ensure_user_keys_present_and_maybe_refresh_for_user(user, for_user) do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(UserView.render("followers.json", %{user: user, for: for_user}))
end
end
def outbox(conn, %{"nickname" => nickname} = params) do
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with %User{} = user <- User.get_cached_by_nickname(nickname),
{:ok, user} <- User.ensure_keys_present(user) do
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conn
|> put_resp_header("content-type", "application/activity+json")
|> json(UserView.render("outbox.json", %{user: user, max_id: params["max_id"]}))
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end
end
def inbox(%{assigns: %{valid_signature: true}} = conn, %{"nickname" => nickname} = params) do
with %User{} = recipient <- User.get_cached_by_nickname(nickname),
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{:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(params["actor"]),
true <- Utils.recipient_in_message(recipient, actor, params),
params <- Utils.maybe_splice_recipient(recipient.ap_id, params) do
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Federator.incoming_ap_doc(params)
json(conn, "ok")
end
end
def inbox(%{assigns: %{valid_signature: true}} = conn, params) do
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Federator.incoming_ap_doc(params)
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json(conn, "ok")
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end
# only accept relayed Creates
def inbox(conn, %{"type" => "Create"} = params) do
Logger.info(
"Signature missing or not from author, relayed Create message, fetching object from source"
)
Fetcher.fetch_object_from_id(params["object"]["id"])
json(conn, "ok")
end
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def inbox(conn, params) do
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headers = Enum.into(conn.req_headers, %{})
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if String.contains?(headers["signature"], params["actor"]) do
Logger.info(
"Signature validation error for: #{params["actor"]}, make sure you are forwarding the HTTP Host header!"
)
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Logger.info(inspect(conn.req_headers))
end
json(conn, dgettext("errors", "error"))
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end
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defp represent_service_actor(%User{} = user, conn) do
with {:ok, user} <- User.ensure_keys_present(user) do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(UserView.render("user.json", %{user: user}))
else
nil -> {:error, :not_found}
end
end
defp represent_service_actor(nil, _), do: {:error, :not_found}
def relay(conn, _params) do
Relay.get_actor()
|> represent_service_actor(conn)
end
def internal_fetch(conn, _params) do
InternalFetchActor.get_actor()
|> represent_service_actor(conn)
end
def whoami(%{assigns: %{user: %User{} = user}} = conn, _params) do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(UserView.render("user.json", %{user: user}))
end
def whoami(_conn, _params), do: {:error, :not_found}
def read_inbox(%{assigns: %{user: user}} = conn, %{"nickname" => nickname} = params) do
if nickname == user.nickname do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(UserView.render("inbox.json", %{user: user, max_id: params["max_id"]}))
else
err =
dgettext("errors", "can't read inbox of %{nickname} as %{as_nickname}",
nickname: nickname,
as_nickname: user.nickname
)
conn
|> put_status(:forbidden)
|> json(err)
end
end
def handle_user_activity(user, %{"type" => "Create"} = params) do
object =
params["object"]
|> Map.merge(Map.take(params, ["to", "cc"]))
|> Map.put("attributedTo", user.ap_id())
|> Transmogrifier.fix_object()
ActivityPub.create(%{
to: params["to"],
actor: user,
context: object["context"],
object: object,
additional: Map.take(params, ["cc"])
})
end
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def handle_user_activity(user, %{"type" => "Delete"} = params) do
with %Object{} = object <- Object.normalize(params["object"]),
true <- user.info.is_moderator || user.ap_id == object.data["actor"],
{:ok, delete} <- ActivityPub.delete(object) do
{:ok, delete}
else
_ -> {:error, dgettext("errors", "Can't delete object")}
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end
end
def handle_user_activity(user, %{"type" => "Like"} = params) do
with %Object{} = object <- Object.normalize(params["object"]),
{:ok, activity, _object} <- ActivityPub.like(user, object) do
{:ok, activity}
else
_ -> {:error, dgettext("errors", "Can't like object")}
end
end
def handle_user_activity(_, _) do
{:error, dgettext("errors", "Unhandled activity type")}
end
def update_outbox(
%{assigns: %{user: user}} = conn,
%{"nickname" => nickname} = params
) do
if nickname == user.nickname do
actor = user.ap_id()
params =
params
|> Map.drop(["id"])
|> Map.put("actor", actor)
|> Transmogrifier.fix_addressing()
with {:ok, %Activity{} = activity} <- handle_user_activity(user, params) do
conn
|> put_status(:created)
|> put_resp_header("location", activity.data["id"])
|> json(activity.data)
else
{:error, message} ->
conn
|> put_status(:bad_request)
|> json(message)
end
else
err =
dgettext("errors", "can't update outbox of %{nickname} as %{as_nickname}",
nickname: nickname,
as_nickname: user.nickname
)
conn
|> put_status(:forbidden)
|> json(err)
end
end
def errors(conn, {:error, :not_found}) do
conn
|> put_status(:not_found)
|> json(dgettext("errors", "Not found"))
end
def errors(conn, _e) do
conn
|> put_status(:internal_server_error)
|> json(dgettext("errors", "error"))
end
defp set_requester_reachable(%Plug.Conn{} = conn, _) do
with actor <- conn.params["actor"],
true <- is_binary(actor) do
Pleroma.Instances.set_reachable(actor)
end
conn
end
defp ensure_user_keys_present_and_maybe_refresh_for_user(user, for_user) do
{:ok, new_user} = User.ensure_keys_present(user)
for_user =
if new_user != user and match?(%User{}, for_user) do
User.get_cached_by_nickname(for_user.nickname)
else
for_user
end
{new_user, for_user}
end
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end