1 defmodule Pleroma.Web.Websub do
4 alias Pleroma.Web.Websub.WebsubServerSubscription
5 alias Pleroma.Web.OStatus.FeedRepresenter
6 alias Pleroma.Web.OStatus
10 @websub_verifier Application.get_env(:pleroma, :websub_verifier)
12 def verify(subscription, getter \\ &HTTPoison.get/3 ) do
13 challenge = Base.encode16(:crypto.strong_rand_bytes(8))
14 lease_seconds = NaiveDateTime.diff(subscription.valid_until, subscription.updated_at) |> to_string
17 "hub.challenge": challenge,
18 "hub.lease_seconds": lease_seconds,
19 "hub.topic": subscription.topic,
20 "hub.mode": "subscribe"
23 url = hd(String.split(subscription.callback, "?"))
24 query = URI.parse(subscription.callback).query || ""
25 params = Map.merge(params, URI.decode_query(query))
26 with {:ok, response} <- getter.(url, [], [params: params]),
27 ^challenge <- response.body
29 changeset = Ecto.Changeset.change(subscription, %{state: "active"})
30 Repo.update(changeset)
32 changeset = Ecto.Changeset.change(subscription, %{state: "rejected"})
33 {:ok, subscription } = Repo.update(changeset)
34 {:error, subscription}
38 def publish(topic, user, activity) do
39 query = from sub in WebsubServerSubscription,
40 where: sub.topic == ^topic and sub.state == "active"
41 subscriptions = Repo.all(query)
42 Enum.each(subscriptions, fn(sub) ->
43 response = FeedRepresenter.to_simple_form(user, [activity], [user])
44 |> :xmerl.export_simple(:xmerl_xml)
46 signature = :crypto.hmac(:sha, sub.secret, response) |> Base.encode16
48 HTTPoison.post(sub.callback, response, [
49 {"Content-Type", "application/atom+xml"},
50 {"X-Hub-Signature", "sha1=#{signature}"}
55 def incoming_subscription_request(user, %{"hub.mode" => "subscribe"} = params) do
56 with {:ok, topic} <- valid_topic(params, user),
57 {:ok, lease_time} <- lease_time(params),
58 secret <- params["hub.secret"],
59 callback <- params["hub.callback"]
61 subscription = get_subscription(topic, callback)
63 state: subscription.state || "requested",
69 change = Ecto.Changeset.change(subscription, data)
70 websub = Repo.insert_or_update!(change)
72 change = Ecto.Changeset.change(websub, %{valid_until: NaiveDateTime.add(websub.updated_at, lease_time)})
73 websub = Repo.update!(change)
75 # Just spawn that for now, maybe pool later.
76 spawn(fn -> @websub_verifier.verify(websub) end)
79 else {:error, reason} ->
84 defp get_subscription(topic, callback) do
85 Repo.get_by(WebsubServerSubscription, topic: topic, callback: callback) || %WebsubServerSubscription{}
88 defp lease_time(%{"hub.lease_seconds" => lease_seconds}) do
89 {:ok, String.to_integer(lease_seconds)}
93 {:ok, 60 * 60 * 24 * 3} # three days
96 defp valid_topic(%{"hub.topic" => topic}, user) do
97 if topic == OStatus.feed_path(user) do
100 {:error, "Wrong topic requested, expected #{OStatus.feed_path(user)}, got #{topic}"}