forked from YokaiRick/akkoma
151 lines
4.2 KiB
Elixir
151 lines
4.2 KiB
Elixir
# 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.OutgoingHandler do
|
|
use GenServer
|
|
|
|
require Logger
|
|
|
|
alias Pleroma.Application
|
|
alias Pleroma.Web.ActivityPub.InternalFetchActor
|
|
alias Pleroma.Web.FedSockets
|
|
alias Pleroma.Web.FedSockets.FedRegistry
|
|
alias Pleroma.Web.FedSockets.FedSocket
|
|
alias Pleroma.Web.FedSockets.SocketInfo
|
|
|
|
def start_link(uri) do
|
|
GenServer.start_link(__MODULE__, %{uri: uri})
|
|
end
|
|
|
|
def init(%{uri: uri}) do
|
|
case initiate_connection(uri) do
|
|
{:ok, ws_origin, conn_pid} ->
|
|
FedRegistry.add_fed_socket(ws_origin, conn_pid)
|
|
|
|
{:error, reason} ->
|
|
Logger.debug("Outgoing connection failed - #{inspect(reason)}")
|
|
:ignore
|
|
end
|
|
end
|
|
|
|
def handle_info({:gun_ws, conn_pid, _ref, {:text, data}}, socket_info) do
|
|
socket_info = SocketInfo.touch(socket_info)
|
|
|
|
case FedSocket.receive_package(socket_info, data) do
|
|
{:noreply, _} ->
|
|
{:noreply, socket_info}
|
|
|
|
{:reply, reply} ->
|
|
:gun.ws_send(conn_pid, {:text, Jason.encode!(reply)})
|
|
{:noreply, socket_info}
|
|
|
|
{:error, reason} ->
|
|
Logger.error("incoming error - receive_package: #{inspect(reason)}")
|
|
{:noreply, socket_info}
|
|
end
|
|
end
|
|
|
|
def handle_info(:close, state) do
|
|
Logger.debug("Sending close frame !!!!!!!")
|
|
{:close, state}
|
|
end
|
|
|
|
def handle_info({:gun_down, _pid, _prot, :closed, _}, state) do
|
|
{:stop, :normal, state}
|
|
end
|
|
|
|
def handle_info({:send, data}, %{conn_pid: conn_pid} = socket_info) do
|
|
socket_info = SocketInfo.touch(socket_info)
|
|
:gun.ws_send(conn_pid, {:text, data})
|
|
{:noreply, socket_info}
|
|
end
|
|
|
|
def handle_info({:gun_ws, _, _, :pong}, state) do
|
|
{:noreply, state, :hibernate}
|
|
end
|
|
|
|
def handle_info(msg, state) do
|
|
Logger.debug("#{__MODULE__} unhandled event #{inspect(msg)}")
|
|
{:noreply, state}
|
|
end
|
|
|
|
def terminate(reason, state) do
|
|
Logger.debug(
|
|
"#{__MODULE__} terminating outgoing connection for #{inspect(state)} for #{inspect(reason)}"
|
|
)
|
|
|
|
{:ok, state}
|
|
end
|
|
|
|
def initiate_connection(uri) do
|
|
ws_uri =
|
|
uri
|
|
|> SocketInfo.origin()
|
|
|> FedSockets.uri_for_origin()
|
|
|
|
%{host: host, port: port, path: path} = URI.parse(ws_uri)
|
|
|
|
with {:ok, conn_pid} <- :gun.open(to_charlist(host), port, %{protocols: [:http]}),
|
|
{:ok, _} <- :gun.await_up(conn_pid),
|
|
reference <-
|
|
:gun.get(conn_pid, to_charlist(path), [
|
|
{'user-agent', to_charlist(Application.user_agent())}
|
|
]),
|
|
{:response, :fin, 204, _} <- :gun.await(conn_pid, reference),
|
|
headers <- build_headers(uri),
|
|
ref <- :gun.ws_upgrade(conn_pid, to_charlist(path), headers, %{silence_pings: false}) do
|
|
receive do
|
|
{:gun_upgrade, ^conn_pid, ^ref, [<<"websocket">>], _} ->
|
|
{:ok, ws_uri, conn_pid}
|
|
after
|
|
15_000 ->
|
|
Logger.debug("Fedsocket timeout connecting to #{inspect(uri)}")
|
|
{:error, :timeout}
|
|
end
|
|
else
|
|
{:response, :nofin, 404, _} ->
|
|
{:error, :fedsockets_not_supported}
|
|
|
|
e ->
|
|
Logger.debug("Fedsocket error connecting to #{inspect(uri)}")
|
|
{:error, e}
|
|
end
|
|
end
|
|
|
|
defp build_headers(uri) do
|
|
host_for_sig = uri |> URI.parse() |> host_signature()
|
|
|
|
shake = FedSocket.shake()
|
|
digest = "SHA-256=" <> (:crypto.hash(:sha256, shake) |> Base.encode64())
|
|
date = Pleroma.Signature.signed_date()
|
|
shake_size = byte_size(shake)
|
|
|
|
signature_opts = %{
|
|
"(request-target)": shake,
|
|
"content-length": to_charlist("#{shake_size}"),
|
|
date: date,
|
|
digest: digest,
|
|
host: host_for_sig
|
|
}
|
|
|
|
signature = Pleroma.Signature.sign(InternalFetchActor.get_actor(), signature_opts)
|
|
|
|
[
|
|
{'signature', to_charlist(signature)},
|
|
{'date', date},
|
|
{'digest', to_charlist(digest)},
|
|
{'content-length', to_charlist("#{shake_size}")},
|
|
{to_charlist("(request-target)"), to_charlist(shake)},
|
|
{'user-agent', to_charlist(Application.user_agent())}
|
|
]
|
|
end
|
|
|
|
defp host_signature(%{host: host, scheme: scheme, port: port}) do
|
|
if port == URI.default_port(scheme) do
|
|
host
|
|
else
|
|
"#{host}:#{port}"
|
|
end
|
|
end
|
|
end
|