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# 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.IncomingHandler do
require Logger
alias Pleroma.Web.FedSockets.FedRegistry
alias Pleroma.Web.FedSockets.FedSocket
alias Pleroma.Web.FedSockets.SocketInfo
import HTTPSignatures, only: [validate_conn: 1, split_signature: 1]
@behaviour :cowboy_websocket
def init(req, state) do
shake = FedSocket.shake()
with true <- Pleroma.Config.get([:fed_sockets, :enabled]),
sec_protocol <- :cowboy_req.header("sec-websocket-protocol", req, nil),
headers = %{"(request-target)" => ^shake} <- :cowboy_req.headers(req),
true <- validate_conn(%{req_headers: headers}),
%{"keyId" => origin} <- split_signature(headers["signature"]) do
req =
if is_nil(sec_protocol) do
req
else
:cowboy_req.set_resp_header("sec-websocket-protocol", sec_protocol, req)
end
{:cowboy_websocket, req, %{origin: origin}, %{}}
else
_ ->
{:ok, req, state}
end
end
def websocket_init(%{origin: origin}) do
case FedRegistry.add_fed_socket(origin) do
{:ok, socket_info} ->
{:ok, socket_info}
e ->
Logger.error("FedSocket websocket_init failed - #{inspect(e)}")
{:error, inspect(e)}
end
end
# Use the ping to check if the connection should be expired
def websocket_handle(:ping, socket_info) do
if SocketInfo.expired?(socket_info) do
{:stop, socket_info}
else
{:ok, socket_info, :hibernate}
end
end
def websocket_handle({:text, data}, socket_info) do
socket_info = SocketInfo.touch(socket_info)
case FedSocket.receive_package(socket_info, data) do
{:noreply, _} ->
{:ok, socket_info}
{:reply, reply} ->
{:reply, {:text, Jason.encode!(reply)}, socket_info}
{:error, reason} ->
Logger.error("incoming error - receive_package: #{inspect(reason)}")
{:ok, socket_info}
end
end
def websocket_info({:send, message}, socket_info) do
socket_info = SocketInfo.touch(socket_info)
{:reply, {:text, message}, socket_info}
end
def websocket_info(:close, state) do
{:stop, state}
end
def websocket_info(message, state) do
Logger.debug("#{__MODULE__} unknown message #{inspect(message)}")
{:ok, state}
end
end
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