Merge branch 'release/2.2.0' into 'stable'v2.2.0

Release/2.2.0

See merge request pleroma/secteam/pleroma!19

1 files changed, 137 insertions, 0 deletions

diff --git a/lib/pleroma/web/fed_sockets/fed_socket.ex b/lib/pleroma/web/fed_sockets/fed_socket.ex
new file mode 100644
index 000000000..98d64e65a
--- /dev/null
+++ b/lib/pleroma/web/fed_sockets/fed_socket.ex
@@ -0,0 +1,137 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.FedSockets.FedSocket do
+  @moduledoc """
+  The FedSocket module abstracts the actions to be taken taken on connections regardless of
+  whether the connection started as inbound or outbound.
+
+
+  Normally outside modules will have no need to call the FedSocket module directly.
+  """
+
+  alias Pleroma.Object
+  alias Pleroma.Object.Containment
+  alias Pleroma.User
+  alias Pleroma.Web.ActivityPub.ObjectView
+  alias Pleroma.Web.ActivityPub.UserView
+  alias Pleroma.Web.ActivityPub.Visibility
+  alias Pleroma.Web.FedSockets.FetchRegistry
+  alias Pleroma.Web.FedSockets.IngesterWorker
+  alias Pleroma.Web.FedSockets.OutgoingHandler
+  alias Pleroma.Web.FedSockets.SocketInfo
+
+  require Logger
+
+  @shake "61dd18f7-f1e6-49a4-939a-a749fcdc1103"
+
+  def connect_to_host(uri) do
+    case OutgoingHandler.start_link(uri) do
+      {:ok, pid} ->
+        {:ok, pid}
+
+      error ->
+        {:error, error}
+    end
+  end
+
+  def close(%SocketInfo{pid: socket_pid}),
+    do: Process.send(socket_pid, :close, [])
+
+  def publish(%SocketInfo{pid: socket_pid}, json) do
+    %{action: :publish, data: json}
+    |> Jason.encode!()
+    |> send_packet(socket_pid)
+  end
+
+  def fetch(%SocketInfo{pid: socket_pid}, id) do
+    fetch_uuid = FetchRegistry.register_fetch(id)
+
+    %{action: :fetch, data: id, uuid: fetch_uuid}
+    |> Jason.encode!()
+    |> send_packet(socket_pid)
+
+    wait_for_fetch_to_return(fetch_uuid, 0)
+  end
+
+  def receive_package(%SocketInfo{} = fed_socket, json) do
+    json
+    |> Jason.decode!()
+    |> process_package(fed_socket)
+  end
+
+  defp wait_for_fetch_to_return(uuid, cntr) do
+    case FetchRegistry.check_fetch(uuid) do
+      {:error, :waiting} ->
+        Process.sleep(:math.pow(cntr, 3) |> Kernel.trunc())
+        wait_for_fetch_to_return(uuid, cntr + 1)
+
+      {:error, :missing} ->
+        Logger.error("FedSocket fetch timed out - #{inspect(uuid)}")
+        {:error, :timeout}
+
+      {:ok, _fr} ->
+        FetchRegistry.pop_fetch(uuid)
+    end
+  end
+
+  defp process_package(%{"action" => "publish", "data" => data}, %{origin: origin} = _fed_socket) do
+    if Containment.contain_origin(origin, data) do
+      IngesterWorker.enqueue("ingest", %{"object" => data})
+    end
+
+    {:reply, %{"action" => "publish_reply", "status" => "processed"}}
+  end
+
+  defp process_package(%{"action" => "fetch_reply", "uuid" => uuid, "data" => data}, _fed_socket) do
+    FetchRegistry.register_fetch_received(uuid, data)
+    {:noreply, nil}
+  end
+
+  defp process_package(%{"action" => "fetch", "uuid" => uuid, "data" => ap_id}, _fed_socket) do
+    {:ok, data} = render_fetched_data(ap_id, uuid)
+    {:reply, data}
+  end
+
+  defp process_package(%{"action" => "publish_reply"}, _fed_socket) do
+    {:noreply, nil}
+  end
+
+  defp process_package(other, _fed_socket) do
+    Logger.warn("unknown json packages received #{inspect(other)}")
+    {:noreply, nil}
+  end
+
+  defp render_fetched_data(ap_id, uuid) do
+    {:ok,
+     %{
+       "action" => "fetch_reply",
+       "status" => "processed",
+       "uuid" => uuid,
+       "data" => represent_item(ap_id)
+     }}
+  end
+
+  defp represent_item(ap_id) do
+    case User.get_by_ap_id(ap_id) do
+      nil ->
+        object = Object.get_cached_by_ap_id(ap_id)
+
+        if Visibility.is_public?(object) do
+          Phoenix.View.render_to_string(ObjectView, "object.json", object: object)
+        else
+          nil
+        end
+
+      user ->
+        Phoenix.View.render_to_string(UserView, "user.json", user: user)
+    end
+  end
+
+  defp send_packet(data, socket_pid) do
+    Process.send(socket_pid, {:send, data}, [])
+  end
+
+  def shake, do: @shake
+end