akkoma/lib/pleroma/web/websub/websub_controller.ex

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# Pleroma: A lightweight social networking server
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# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.Websub.WebsubController do
use Pleroma.Web, :controller
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alias Pleroma.{Repo, User}
alias Pleroma.Web.{Websub, Federator}
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alias Pleroma.Web.Websub.WebsubClientSubscription
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require Logger
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plug(
Pleroma.Web.FederatingPlug
when action in [
:websub_subscription_request,
:websub_subscription_confirmation,
:websub_incoming
]
)
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def websub_subscription_request(conn, %{"nickname" => nickname} = params) do
user = User.get_cached_by_nickname(nickname)
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with {:ok, _websub} <- Websub.incoming_subscription_request(user, params) do
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conn
|> send_resp(202, "Accepted")
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else
{:error, reason} ->
conn
|> send_resp(500, reason)
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end
end
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# TODO: Extract this into the Websub module
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def websub_subscription_confirmation(
conn,
%{
"id" => id,
"hub.mode" => "subscribe",
"hub.challenge" => challenge,
"hub.topic" => topic
} = params
) do
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Logger.debug("Got WebSub confirmation")
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Logger.debug(inspect(params))
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lease_seconds =
if params["hub.lease_seconds"] do
String.to_integer(params["hub.lease_seconds"])
else
# Guess 3 days
60 * 60 * 24 * 3
end
with %WebsubClientSubscription{} = websub <-
Repo.get_by(WebsubClientSubscription, id: id, topic: topic) do
valid_until = NaiveDateTime.add(NaiveDateTime.utc_now(), lease_seconds)
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change = Ecto.Changeset.change(websub, %{state: "accepted", valid_until: valid_until})
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{:ok, _websub} = Repo.update(change)
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conn
|> send_resp(200, challenge)
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else
_e ->
conn
|> send_resp(500, "Error")
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end
end
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def websub_subscription_confirmation(conn, params) do
Logger.info("Invalid WebSub confirmation request: #{inspect(params)}")
conn
|> send_resp(500, "Invalid parameters")
end
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def websub_incoming(conn, %{"id" => id}) do
with "sha1=" <> signature <- hd(get_req_header(conn, "x-hub-signature")),
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signature <- String.downcase(signature),
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%WebsubClientSubscription{} = websub <- Repo.get(WebsubClientSubscription, id),
{:ok, body, _conn} = read_body(conn),
^signature <- Websub.sign(websub.secret, body) do
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Federator.incoming_doc(body)
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conn
|> send_resp(200, "OK")
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else
_e ->
Logger.debug("Can't handle incoming subscription post")
conn
|> send_resp(500, "Error")
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end
end
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end