Commit 90da2550 authored by lain's avatar lain
Browse files

Add discovery and subscription requests to websub.

parent 1ea4325f
......@@ -4,6 +4,7 @@ defmodule Pleroma.Web.Websub do
alias Pleroma.Web.OStatus.FeedRepresenter
alias Pleroma.Web.OStatus
alias Pleroma.Web.XML
require Logger
import Ecto.Query
......@@ -98,8 +99,8 @@ defp valid_topic(%{"hub.topic" => topic}, user) do
end
end
def subscribe(user, topic) do
# Race condition, use transactions
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})
......@@ -109,11 +110,60 @@ def subscribe(user, topic) do
topic: topic,
subscribers: [user.ap_id],
state: "requested",
secret: :crypto.strong_rand_bytes(8) |> Base.url_encode64
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
{:ok, subscription}
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
......@@ -76,4 +76,14 @@ def websub_subscription_factory do
state: "requested"
}
end
def websub_client_subscription_factory do
%Pleroma.Web.Websub.WebsubClientSubscription{
topic: "http://example.org",
secret: "here's a secret",
valid_until: nil,
state: "requested",
subscribers: []
}
end
end
......@@ -77,7 +77,6 @@ test "an incoming subscription request for an existing subscription" do
"hub.lease_seconds" => "100"
}
{:ok, subscription } = Websub.incoming_subscription_request(user, data)
assert subscription.topic == Pleroma.Web.OStatus.feed_path(user)
assert subscription.state == sub.state
......@@ -87,14 +86,72 @@ test "an incoming subscription request for an existing subscription" do
assert subscription.id == sub.id
end
def accepting_verifier(subscription) do
{:ok, %{ subscription | state: "accepted" }}
end
test "initiate a subscription for a given user and topic" do
user = insert(:user)
topic = "http://example.org/some-topic.atom"
{:ok, websub} = Websub.subscribe(user, topic)
{:ok, websub} = Websub.subscribe(user, topic, &accepting_verifier/1)
assert websub.subscribers == [user.ap_id]
assert websub.topic == topic
assert is_binary(websub.secret)
assert websub.user == user
assert websub.state == "accepted"
end
test "discovers the hub and canonical url" do
topic = "https://mastodon.social/users/lambadalambda.atom"
getter = fn(^topic) ->
doc = File.read!("test/fixtures/lambadalambda.atom")
{:ok, %{status_code: 200, body: doc}}
end
{:ok, discovered} = Websub.discover(topic, getter)
assert %{hub: "https://mastodon.social/api/push", url: topic} == discovered
end
test "calls the hub, requests topic" do
hub = "https://social.heldscal.la/main/push/hub"
topic = "https://social.heldscal.la/api/statuses/user_timeline/23211.atom"
websub = insert(:websub_client_subscription, %{hub: hub, topic: topic})
poster = fn (^hub, {:form, data}, _headers) ->
assert Keyword.get(data, :"hub.mode") == "subscribe"
{:ok, %{status_code: 202}}
end
task = Task.async(fn -> Websub.request_subscription(websub, poster) end)
change = Ecto.Changeset.change(websub, %{state: "accepted"})
{:ok, _} = Repo.update(change)
{:ok, websub} = Task.await(task)
assert websub.state == "accepted"
end
test "rejects the subscription if it can't be accepted" do
hub = "https://social.heldscal.la/main/push/hub"
topic = "https://social.heldscal.la/api/statuses/user_timeline/23211.atom"
websub = insert(:websub_client_subscription, %{hub: hub, topic: topic})
poster = fn (^hub, {:form, _data}, _headers) ->
{:ok, %{status_code: 202}}
end
{:error, websub} = Websub.request_subscription(websub, poster, 1000)
assert websub.state == "rejected"
websub = insert(:websub_client_subscription, %{hub: hub, topic: topic})
poster = fn (^hub, {:form, _data}, _headers) ->
{:ok, %{status_code: 400}}
end
{:error, websub} = Websub.request_subscription(websub, poster, 1000)
assert websub.state == "rejected"
end
end
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