defmodule Pleroma.Web.Websub do
alias Pleroma.Repo
- alias Pleroma.Web.Websub.WebsubServerSubscription
+ alias Pleroma.Web.Websub.{WebsubServerSubscription, WebsubClientSubscription}
alias Pleroma.Web.OStatus.FeedRepresenter
alias Pleroma.Web.OStatus
+ alias Pleroma.Web.XML
+ require Logger
import Ecto.Query
- @websub_verifier Application.get_env(:pleroma, :websub_verifier)
-
def verify(subscription, getter \\ &HTTPoison.get/3 ) do
challenge = Base.encode16(:crypto.strong_rand_bytes(8))
lease_seconds = NaiveDateTime.diff(subscription.valid_until, subscription.updated_at) |> to_string
change = Ecto.Changeset.change(websub, %{valid_until: NaiveDateTime.add(websub.updated_at, lease_time)})
websub = Repo.update!(change)
- # Just spawn that for now, maybe pool later.
- spawn(fn -> @websub_verifier.verify(websub) end)
+ Pleroma.Web.Federator.enqueue(:verify_websub, websub)
{:ok, websub}
else {:error, reason} ->
{:error, "Wrong topic requested, expected #{OStatus.feed_path(user)}, got #{topic}"}
end
end
+
+ def subscribe(user, topic, requester \\ &request_subscription/1) do
+ # FIXME: Race condition, use transactions
+ {:ok, subscription} = with subscription when not is_nil(subscription) <- Repo.get_by(WebsubClientSubscription, topic: topic) do
+ subscribers = [user.ap_id, subscription.subcribers] |> Enum.uniq
+ change = Ecto.Changeset.change(subscription, %{subscribers: subscribers})
+ Repo.update(change)
+ else _e ->
+ subscription = %WebsubClientSubscription{
+ topic: topic,
+ subscribers: [user.ap_id],
+ state: "requested",
+ secret: :crypto.strong_rand_bytes(8) |> Base.url_encode64,
+ user: user
+ }
+ Repo.insert(subscription)
+ end
+ requester.(subscription)
+ end
+
+ def discover(topic, getter \\ &HTTPoison.get/1) do
+ with {:ok, response} <- getter.(topic),
+ status_code when status_code in 200..299 <- response.status_code,
+ body <- response.body,
+ doc <- XML.parse_document(body),
+ url when not is_nil(url) <- XML.string_from_xpath(~S{/feed/link[@rel="self"]/@href}, doc),
+ hub when not is_nil(hub) <- XML.string_from_xpath(~S{/feed/link[@rel="hub"]/@href}, doc) do
+ {:ok, %{url: url, hub: hub}}
+ else e ->
+ {:error, e}
+ end
+ end
+
+ def request_subscription(websub, poster \\ &HTTPoison.post/3, timeout \\ 10_000) do
+ data = [
+ "hub.mode": "subscribe",
+ "hub.topic": websub.topic,
+ "hub.secret": websub.secret,
+ "hub.callback": "https://social.heldscal.la/callback"
+ ]
+
+ # This checks once a second if we are confirmed yet
+ websub_checker = fn ->
+ helper = fn (helper) ->
+ :timer.sleep(1000)
+ websub = Repo.get_by(WebsubClientSubscription, id: websub.id, state: "accepted")
+ if websub, do: websub, else: helper.(helper)
+ end
+ helper.(helper)
+ end
+
+ task = Task.async(websub_checker)
+
+ with {:ok, %{status_code: 202}} <- poster.(websub.hub, {:form, data}, ["Content-type": "application/x-www-form-urlencoded"]),
+ {:ok, websub} <- Task.yield(task, timeout) do
+ {:ok, websub}
+ else e ->
+ Task.shutdown(task)
+
+ change = Ecto.Changeset.change(websub, %{state: "rejected"})
+ {:ok, websub} = Repo.update(change)
+
+ Logger.debug("Couldn't confirm subscription: #{inspect(websub)}")
+ Logger.debug("error: #{inspect(e)}")
+
+ {:error, websub}
+ end
+ end
end