distraction.party/lib/pleroma/web/federator/federator.ex
2017-11-19 15:10:51 +01:00

129 lines
4.6 KiB
Elixir

defmodule Pleroma.Web.Federator do
use GenServer
alias Pleroma.User
alias Pleroma.Web.{WebFinger, Websub}
require Logger
@websub Application.get_env(:pleroma, :websub)
@ostatus Application.get_env(:pleroma, :ostatus)
@httpoison Application.get_env(:pleroma, :httpoison)
@max_jobs 10
def start_link do
spawn(fn ->
Process.sleep(1000 * 60 * 1) # 1 minute
enqueue(:refresh_subscriptions, nil)
end)
GenServer.start_link(__MODULE__, %{
in: {:sets.new(), :queue.new()},
out: {:sets.new(), :queue.new()}
}, name: __MODULE__)
end
def handle(:refresh_subscriptions, _) do
Logger.debug("Federator running refresh subscriptions")
Websub.refresh_subscriptions()
spawn(fn ->
Process.sleep(1000 * 60 * 60 * 6) # 6 hours
enqueue(:refresh_subscriptions, nil)
end)
end
def handle(:request_subscription, websub) do
Logger.debug("Refreshing #{websub.topic}")
with {:ok, websub } <- Websub.request_subscription(websub) do
Logger.debug("Successfully refreshed #{websub.topic}")
else
_e -> Logger.debug("Couldn't refresh #{websub.topic}")
end
end
def handle(:publish, activity) do
Logger.debug(fn -> "Running publish for #{activity.data["id"]}" end)
with actor when not is_nil(actor) <- User.get_cached_by_ap_id(activity.data["actor"]) do
Logger.debug(fn -> "Sending #{activity.data["id"]} out via websub" end)
Websub.publish(Pleroma.Web.OStatus.feed_path(actor), actor, activity)
{:ok, actor} = WebFinger.ensure_keys_present(actor)
Logger.debug(fn -> "Sending #{activity.data["id"]} out via salmon" end)
Pleroma.Web.Salmon.publish(actor, activity)
end
end
def handle(:verify_websub, websub) do
Logger.debug(fn -> "Running websub verification for #{websub.id} (#{websub.topic}, #{websub.callback})" end)
@websub.verify(websub)
end
def handle(:incoming_doc, doc) do
Logger.debug("Got document, trying to parse")
@ostatus.handle_incoming(doc)
end
def handle(:publish_single_websub, %{xml: xml, topic: topic, callback: callback, secret: secret}) do
signature = @websub.sign(secret || "", xml)
Logger.debug(fn -> "Pushing #{topic} to #{callback}" end)
with {:ok, %{status_code: code}} <- @httpoison.post(callback, xml, [
{"Content-Type", "application/atom+xml"},
{"X-Hub-Signature", "sha1=#{signature}"}
], timeout: 10000, recv_timeout: 20000) do
Logger.debug(fn -> "Pushed to #{callback}, code #{code}" end)
else e ->
Logger.debug(fn -> "Couldn't push to #{callback}, #{inspect(e)}" end)
end
end
def handle(type, _) do
Logger.debug(fn -> "Unknown task: #{type}" end)
{:error, "Don't know what do do with this"}
end
def enqueue(type, payload) do
if Mix.env == :test do
handle(type, payload)
else
GenServer.cast(__MODULE__, {:enqueue, type, payload})
end
end
def maybe_start_job(running_jobs, queue) do
if (:sets.size(running_jobs) < @max_jobs) && !:queue.is_empty(queue) do
{{:value, {type, payload}}, queue} = :queue.out(queue)
{:ok, pid} = Task.start(fn -> handle(type, payload) end)
mref = Process.monitor(pid)
{:sets.add_element(mref, running_jobs), queue}
else
{running_jobs, queue}
end
end
def handle_cast({:enqueue, type, payload}, state) when type in [:incoming_doc] do
%{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}} = state
i_queue = :queue.in({type, payload}, i_queue)
{i_running_jobs, i_queue} = maybe_start_job(i_running_jobs, i_queue)
{:noreply, %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}}}
end
def handle_cast({:enqueue, type, payload}, state) do
%{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}} = state
o_queue = :queue.in({type, payload}, o_queue)
{o_running_jobs, o_queue} = maybe_start_job(o_running_jobs, o_queue)
{:noreply, %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}}}
end
def handle_cast(m, state) do
IO.inspect("Unknown: #{inspect(m)}, #{inspect(state)}")
{:noreply, state}
end
def handle_info({:DOWN, ref, :process, _pid, _reason}, state) do
%{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}} = state
i_running_jobs = :sets.del_element(ref, i_running_jobs)
o_running_jobs = :sets.del_element(ref, o_running_jobs)
{i_running_jobs, i_queue} = maybe_start_job(i_running_jobs, i_queue)
{o_running_jobs, o_queue} = maybe_start_job(o_running_jobs, o_queue)
{:noreply, %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}}}
end
end