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defmodule Pleroma.Web.Websub do
alias Pleroma.Repo
alias Pleroma.Websub
alias Pleroma.Web.Websub.WebsubServerSubscription
alias Pleroma.Web.OStatus.FeedRepresenter
import Ecto.Query
def verify(subscription, getter \\ &HTTPoison.get/3 ) do
challenge = Base.encode16(:crypto.strong_rand_bytes(8))
lease_seconds = NaiveDateTime.diff(subscription.valid_until, subscription.inserted_at) |> to_string
params = %{
"hub.challenge": challenge,
"hub.lease_seconds": lease_seconds,
"hub.topic": subscription.topic,
"hub.mode": "subscribe"
}
url = hd(String.split(subscription.callback, "?"))
query = URI.parse(subscription.callback).query || ""
params = Map.merge(params, URI.decode_query(query))
with {:ok, response} <- getter.(url, [], [params: params]),
^challenge <- response.body
do
changeset = Ecto.Changeset.change(subscription, %{state: "active"})
Repo.update(changeset)
else _e ->
changeset = Ecto.Changeset.change(subscription, %{state: "rejected"})
{:ok, subscription } = Repo.update(changeset)
{:error, subscription}
end
end
def publish(topic, user, activity) do
query = from sub in WebsubServerSubscription,
where: sub.topic == ^topic and sub.state == "active"
subscriptions = Repo.all(query)
Enum.each(subscriptions, fn(sub) ->
response = FeedRepresenter.to_simple_form(user, [activity], [user])
|> :xmerl.export_simple(:xmerl_xml)
signature = :crypto.hmac(:sha, sub.secret, response) |> Base.encode16
HTTPoison.post(sub.callback, response, [
{"Content-Type", "application/atom+xml"},
{"X-Hub-Signature", "sha1=#{signature}"}
])
end)
end
end
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