1 defmodule Pleroma.Web.Websub do
4 alias Pleroma.Web.Websub.{WebsubServerSubscription, WebsubClientSubscription}
5 alias Pleroma.Web.OStatus.FeedRepresenter
6 alias Pleroma.Web.{XML, Endpoint, OStatus}
7 alias Pleroma.Web.Router.Helpers
12 @httpoison Application.get_env(:pleroma, :httpoison)
14 def verify(subscription, getter \\ &@httpoison.get/3) do
15 challenge = Base.encode16(:crypto.strong_rand_bytes(8))
16 lease_seconds = NaiveDateTime.diff(subscription.valid_until, subscription.updated_at)
17 lease_seconds = lease_seconds |> to_string
20 "hub.challenge": challenge,
21 "hub.lease_seconds": lease_seconds,
22 "hub.topic": subscription.topic,
23 "hub.mode": "subscribe"
26 url = hd(String.split(subscription.callback, "?"))
27 query = URI.parse(subscription.callback).query || ""
28 params = Map.merge(params, URI.decode_query(query))
29 with {:ok, response} <- getter.(url, [], [params: params]),
30 ^challenge <- response.body
32 changeset = Changeset.change(subscription, %{state: "active"})
33 Repo.update(changeset)
35 Logger.debug("Couldn't verify subscription")
36 Logger.debug(inspect(e))
37 {:error, subscription}
41 @supported_activities [
49 def publish(topic, user, %{data: %{"type" => type}} = activity) when type in @supported_activities do
50 # TODO: Only send to still valid subscriptions.
51 query = from sub in WebsubServerSubscription,
52 where: sub.topic == ^topic and sub.state == "active",
53 where: fragment("? > NOW()", sub.valid_until)
54 subscriptions = Repo.all(query)
55 Enum.each(subscriptions, fn(sub) ->
57 |> FeedRepresenter.to_simple_form([activity], [user])
58 |> :xmerl.export_simple(:xmerl_xml)
64 callback: sub.callback,
67 Pleroma.Web.Federator.enqueue(:publish_single_websub, data)
70 def publish(_,_,_), do: ""
72 def sign(secret, doc) do
73 :crypto.hmac(:sha, secret, to_string(doc)) |> Base.encode16 |> String.downcase
76 def incoming_subscription_request(user, %{"hub.mode" => "subscribe"} = params) do
77 with {:ok, topic} <- valid_topic(params, user),
78 {:ok, lease_time} <- lease_time(params),
79 secret <- params["hub.secret"],
80 callback <- params["hub.callback"]
82 subscription = get_subscription(topic, callback)
84 state: subscription.state || "requested",
90 change = Changeset.change(subscription, data)
91 websub = Repo.insert_or_update!(change)
93 change = Changeset.change(websub, %{valid_until:
94 NaiveDateTime.add(websub.updated_at, lease_time)})
95 websub = Repo.update!(change)
97 Pleroma.Web.Federator.enqueue(:verify_websub, websub)
100 else {:error, reason} ->
101 Logger.debug("Couldn't create subscription")
102 Logger.debug(inspect(reason))
108 defp get_subscription(topic, callback) do
109 Repo.get_by(WebsubServerSubscription, topic: topic, callback: callback) ||
110 %WebsubServerSubscription{}
113 # Temp hack for mastodon.
114 defp lease_time(%{"hub.lease_seconds" => ""}) do
115 {:ok, 60 * 60 * 24 * 3} # three days
118 defp lease_time(%{"hub.lease_seconds" => lease_seconds}) do
119 {:ok, String.to_integer(lease_seconds)}
122 defp lease_time(_) do
123 {:ok, 60 * 60 * 24 * 3} # three days
126 defp valid_topic(%{"hub.topic" => topic}, user) do
127 if topic == OStatus.feed_path(user) do
128 {:ok, OStatus.feed_path(user)}
130 {:error, "Wrong topic requested, expected #{OStatus.feed_path(user)}, got #{topic}"}
134 def subscribe(subscriber, subscribed, requester \\ &request_subscription/1) do
135 topic = subscribed.info["topic"]
136 # FIXME: Race condition, use transactions
137 {:ok, subscription} = with subscription when not is_nil(subscription) <- Repo.get_by(WebsubClientSubscription, topic: topic) do
138 subscribers = [subscriber.ap_id | subscription.subscribers] |> Enum.uniq
139 change = Ecto.Changeset.change(subscription, %{subscribers: subscribers})
142 subscription = %WebsubClientSubscription{
144 hub: subscribed.info["hub"],
145 subscribers: [subscriber.ap_id],
147 secret: :crypto.strong_rand_bytes(8) |> Base.url_encode64,
150 Repo.insert(subscription)
152 requester.(subscription)
155 def gather_feed_data(topic, getter \\ &@httpoison.get/1) do
156 with {:ok, response} <- getter.(topic),
157 status_code when status_code in 200..299 <- response.status_code,
158 body <- response.body,
159 doc <- XML.parse_document(body),
160 uri when not is_nil(uri) <- XML.string_from_xpath("/feed/author[1]/uri", doc),
161 hub when not is_nil(hub) <- XML.string_from_xpath(~S{/feed/link[@rel="hub"]/@href}, doc) do
163 name = XML.string_from_xpath("/feed/author[1]/name", doc)
164 preferredUsername = XML.string_from_xpath("/feed/author[1]/poco:preferredUsername", doc)
165 displayName = XML.string_from_xpath("/feed/author[1]/poco:displayName", doc)
166 avatar = OStatus.make_avatar_object(doc)
167 bio = XML.string_from_xpath("/feed/author[1]/summary", doc)
172 "nickname" => preferredUsername || name,
173 "name" => displayName || name,
174 "host" => URI.parse(uri).host,
183 def request_subscription(websub, poster \\ &@httpoison.post/3, timeout \\ 10_000) do
185 "hub.mode": "subscribe",
186 "hub.topic": websub.topic,
187 "hub.secret": websub.secret,
188 "hub.callback": Helpers.websub_url(Endpoint, :websub_subscription_confirmation, websub.id)
191 # This checks once a second if we are confirmed yet
192 websub_checker = fn ->
193 helper = fn (helper) ->
195 websub = Repo.get_by(WebsubClientSubscription, id: websub.id, state: "accepted")
196 if websub, do: websub, else: helper.(helper)
201 task = Task.async(websub_checker)
203 with {:ok, %{status_code: 202}} <- poster.(websub.hub, {:form, data}, ["Content-type": "application/x-www-form-urlencoded"]),
204 {:ok, websub} <- Task.yield(task, timeout) do
209 change = Ecto.Changeset.change(websub, %{state: "rejected"})
210 {:ok, websub} = Repo.update(change)
212 Logger.debug(fn -> "Couldn't confirm subscription: #{inspect(websub)}" end)
213 Logger.debug(fn -> "error: #{inspect(e)}" end)
219 def refresh_subscriptions(delta \\ 60 * 60 * 24) do
220 Logger.debug("Refreshing subscriptions")
222 cut_off = NaiveDateTime.add(NaiveDateTime.utc_now, delta)
224 query = from sub in WebsubClientSubscription,
225 where: sub.valid_until < ^cut_off
227 subs = Repo.all(query)
229 Enum.each(subs, fn (sub) ->
230 Pleroma.Web.Federator.enqueue(:request_subscription, sub)