Disconnect streaming sessions when token is revoked

Use Websockex to replace websocket_client

Test that server will disconnect websocket upon token revocation

Lint

Execute session disconnect in background

Refactor streamer test

allow multi-streams

rebase websocket change

lib/pleroma/application.ex

@@ -63,7 +63,8 @@ defmodule Pleroma.Application do
         Pleroma.Repo,
         Config.TransferTask,
         Pleroma.Emoji,
-        Pleroma.Web.Plugs.RateLimiter.Supervisor
+        Pleroma.Web.Plugs.RateLimiter.Supervisor,
+        {Task.Supervisor, name: Pleroma.TaskSupervisor}
       ] ++
         cachex_children() ++
         http_children() ++

lib/pleroma/web/mastodon_api/websocket_handler.ex

@@ -59,7 +59,7 @@ defmodule Pleroma.Web.MastodonAPI.WebsocketHandler do
       "#{__MODULE__} accepted websocket connection for user #{(state.user || %{id: "anonymous"}).id}, topic #{state.topic}"
     )
 
-    Streamer.add_socket(state.topic, state.user)
+    Streamer.add_socket(state.topic, state.oauth_token)
     {:ok, %{state | timer: timer()}}
   end
 
@@ -139,6 +139,10 @@ defmodule Pleroma.Web.MastodonAPI.WebsocketHandler do
     {:reply, :ping, %{state | timer: nil, count: 0}, :hibernate}
   end
 
+  def websocket_info(:close, state) do
+    {:stop, state}
+  end
+
   # State can be `[]` only in case we terminate before switching to websocket,
   # we already log errors for these cases in `init/1`, so just do nothing here
   def terminate(_reason, _req, []), do: :ok

lib/pleroma/web/o_auth/token/strategy/revoke.ex

@@ -21,6 +21,18 @@ defmodule Pleroma.Web.OAuth.Token.Strategy.Revoke do
   @doc "Revokes access token"
   @spec revoke(Token.t()) :: {:ok, Token.t()} | {:error, Ecto.Changeset.t()}
   def revoke(%Token{} = token) do
-    Repo.delete(token)
+    with {:ok, token} <- Repo.delete(token) do
+      Task.Supervisor.start_child(
+        Pleroma.TaskSupervisor,
+        Pleroma.Web.Streamer,
+        :close_streams_by_oauth_token,
+        [token],
+        restart: :transient
+      )
+
+      {:ok, token}
+    else
+      result -> result
+    end
   end
 end

lib/pleroma/web/streamer.ex

@@ -36,7 +36,7 @@ defmodule Pleroma.Web.Streamer do
           {:ok, topic :: String.t()} | {:error, :bad_topic} | {:error, :unauthorized}
   def get_topic_and_add_socket(stream, user, oauth_token, params \\ %{}) do
     with {:ok, topic} <- get_topic(stream, user, oauth_token, params) do
-      add_socket(topic, user)
+      add_socket(topic, oauth_token)
     end
   end
 
@@ -124,10 +124,10 @@ defmodule Pleroma.Web.Streamer do
   end
 
   @doc "Registers the process for streaming. Use `get_topic/3` to get the full authorized topic."
-  def add_socket(topic, user) do
+  def add_socket(topic, oauth_token) do
     if should_env_send?() do
-      auth? = if user, do: true
-      Registry.register(@registry, topic, auth?)
+      oauth_token_id = if oauth_token, do: oauth_token.id, else: false
+      Registry.register(@registry, topic, oauth_token_id)
     end
 
     {:ok, topic}
@@ -311,6 +311,22 @@ defmodule Pleroma.Web.Streamer do
     end
   end
 
+  def close_streams_by_oauth_token(oauth_token) do
+    if should_env_send?() do
+      Registry.select(
+        @registry,
+        [
+          {
+            {:"$1", :"$2", :"$3"},
+            [{:==, :"$3", oauth_token.id}],
+            [:"$2"]
+          }
+        ]
+      )
+      |> Enum.each(fn pid -> send(pid, :close) end)
+    end
+  end
+
   # In test environement, only return true if the registry is started.
   # In benchmark environment, returns false.
   # In any other environment, always returns true.

mix.exs

@@ -206,7 +206,7 @@ defmodule Pleroma.Mixfile do
       # temporary downgrade for excoveralls, hackney until hackney max_connections bug will be fixed
       {:excoveralls, "0.12.3", only: :test},
       {:mox, "~> 1.0", only: :test},
-      {:websocket_client, git: "https://github.com/jeremyong/websocket_client.git", only: :test}
+      {:websockex, "~> 0.4.3", only: :test}
     ] ++ oauth_deps()
   end
 

mix.lock

@@ -120,5 +120,5 @@
   "unsafe": {:hex, :unsafe, "1.0.1", "a27e1874f72ee49312e0a9ec2e0b27924214a05e3ddac90e91727bc76f8613d8", [:mix], [], "hexpm", "6c7729a2d214806450d29766abc2afaa7a2cbecf415be64f36a6691afebb50e5"},
   "vex": {:hex, :vex, "0.9.0", "613ea5eb3055662e7178b83e25b2df0975f68c3d8bb67c1645f0573e1a78d606", [:mix], [], "hexpm", "c69fff44d5c8aa3f1faee71bba1dcab05dd36364c5a629df8bb11751240c857f"},
   "web_push_encryption": {:hex, :web_push_encryption, "0.3.1", "76d0e7375142dfee67391e7690e89f92578889cbcf2879377900b5620ee4708d", [:mix], [{:httpoison, "~> 1.0", [hex: :httpoison, repo: "hexpm", optional: false]}, {:jose, "~> 1.11.1", [hex: :jose, repo: "hexpm", optional: false]}], "hexpm", "4f82b2e57622fb9337559058e8797cb0df7e7c9790793bdc4e40bc895f70e2a2"},
-  "websocket_client": {:git, "https://github.com/jeremyong/websocket_client.git", "9a6f65d05ebf2725d62fb19262b21f1805a59fbf", []},
+  "websockex": {:hex, :websockex, "0.4.3", "92b7905769c79c6480c02daacaca2ddd49de936d912976a4d3c923723b647bf0", [:mix], [], "hexpm", "95f2e7072b85a3a4cc385602d42115b73ce0b74a9121d0d6dbbf557645ac53e4"},
 }

test/pleroma/integration/mastodon_websocket_test.exs

@@ -34,15 +34,20 @@ defmodule Pleroma.Integration.MastodonWebsocketTest do
   test "allows multi-streams" do
     capture_log(fn ->
       assert {:ok, _} = start_socket()
-      assert {:error, {404, _}} = start_socket("?stream=ncjdk")
+
+      assert {:error, %WebSockex.RequestError{code: 404, message: "Not Found"}} =
+               start_socket("?stream=ncjdk")
+
       Process.sleep(30)
     end)
   end
 
   test "requires authentication and a valid token for protected streams" do
     capture_log(fn ->
-      assert {:error, {401, _}} = start_socket("?stream=user&access_token=aaaaaaaaaaaa")
-      assert {:error, {401, _}} = start_socket("?stream=user")
+      assert {:error, %WebSockex.RequestError{code: 401}} =
+               start_socket("?stream=user&access_token=aaaaaaaaaaaa")
+
+      assert {:error, %WebSockex.RequestError{code: 401}} = start_socket("?stream=user")
       Process.sleep(30)
     end)
   end
@@ -91,7 +96,7 @@ defmodule Pleroma.Integration.MastodonWebsocketTest do
 
       {:ok, token} = OAuth.Token.exchange_token(app, auth)
 
-      %{user: user, token: token}
+      %{app: app, user: user, token: token}
     end
 
     test "accepts valid tokens", state do
@@ -102,7 +107,7 @@ defmodule Pleroma.Integration.MastodonWebsocketTest do
       assert {:ok, _} = start_socket("?stream=user&access_token=#{token.token}")
 
       capture_log(fn ->
-        assert {:error, {401, _}} = start_socket("?stream=user")
+        assert {:error, %WebSockex.RequestError{code: 401}} = start_socket("?stream=user")
         Process.sleep(30)
       end)
     end
@@ -111,7 +116,9 @@ defmodule Pleroma.Integration.MastodonWebsocketTest do
       assert {:ok, _} = start_socket("?stream=user:notification&access_token=#{token.token}")
 
       capture_log(fn ->
-        assert {:error, {401, _}} = start_socket("?stream=user:notification")
+        assert {:error, %WebSockex.RequestError{code: 401}} =
+                 start_socket("?stream=user:notification")
+
         Process.sleep(30)
       end)
     end
@@ -120,11 +127,27 @@ defmodule Pleroma.Integration.MastodonWebsocketTest do
       assert {:ok, _} = start_socket("?stream=user", [{"Sec-WebSocket-Protocol", token.token}])
 
       capture_log(fn ->
-        assert {:error, {401, _}} =
+        assert {:error, %WebSockex.RequestError{code: 401}} =
                  start_socket("?stream=user", [{"Sec-WebSocket-Protocol", "I am a friend"}])
 
         Process.sleep(30)
       end)
     end
+
+    test "disconnect when token is revoked", %{app: app, user: user, token: token} do
+      assert {:ok, _} = start_socket("?stream=user:notification&access_token=#{token.token}")
+      assert {:ok, _} = start_socket("?stream=user&access_token=#{token.token}")
+
+      {:ok, auth} = OAuth.Authorization.create_authorization(app, user)
+
+      {:ok, token2} = OAuth.Token.exchange_token(app, auth)
+      assert {:ok, _} = start_socket("?stream=user&access_token=#{token2.token}")
+
+      OAuth.Token.Strategy.Revoke.revoke(token)
+
+      assert_receive {:close, _}
+      assert_receive {:close, _}
+      refute_receive {:close, _}
+    end
   end
 end

test/pleroma/web/streamer_test.exs

@@ -760,4 +760,105 @@ defmodule Pleroma.Web.StreamerTest do
       assert last_status["id"] == to_string(create_activity.id)
     end
   end
+
+  describe "stop streaming if token got revoked" do
+    setup do
+      child_proc = fn start, finalize ->
+        fn ->
+          start.()
+
+          receive do
+            {StreamerTest, :ready} ->
+              assert_receive {:render_with_user, _, "update.json", _, _}
+
+              receive do
+                {StreamerTest, :revoked} -> finalize.()
+              end
+          end
+        end
+      end
+
+      starter = fn user, token ->
+        fn -> Streamer.get_topic_and_add_socket("user", user, token) end
+      end
+
+      hit = fn -> assert_receive :close end
+      miss = fn -> refute_receive :close end
+
+      send_all = fn tasks, thing -> Enum.each(tasks, &send(&1.pid, thing)) end
+
+      %{
+        child_proc: child_proc,
+        starter: starter,
+        hit: hit,
+        miss: miss,
+        send_all: send_all
+      }
+    end
+
+    test "do not revoke other tokens", %{
+      child_proc: child_proc,
+      starter: starter,
+      hit: hit,
+      miss: miss,
+      send_all: send_all
+    } do
+      %{user: user, token: token} = oauth_access(["read"])
+      %{token: token2} = oauth_access(["read"], user: user)
+      %{user: user2, token: user2_token} = oauth_access(["read"])
+
+      post_user = insert(:user)
+      CommonAPI.follow(user, post_user)
+      CommonAPI.follow(user2, post_user)
+
+      tasks = [
+        Task.async(child_proc.(starter.(user, token), hit)),
+        Task.async(child_proc.(starter.(user, token2), miss)),
+        Task.async(child_proc.(starter.(user2, user2_token), miss))
+      ]
+
+      {:ok, _} =
+        CommonAPI.post(post_user, %{
+          status: "hi"
+        })
+
+      send_all.(tasks, {StreamerTest, :ready})
+
+      Pleroma.Web.OAuth.Token.Strategy.Revoke.revoke(token)
+
+      send_all.(tasks, {StreamerTest, :revoked})
+
+      Enum.each(tasks, &Task.await/1)
+    end
+
+    test "revoke all streams for this token", %{
+      child_proc: child_proc,
+      starter: starter,
+      hit: hit,
+      send_all: send_all
+    } do
+      %{user: user, token: token} = oauth_access(["read"])
+
+      post_user = insert(:user)
+      CommonAPI.follow(user, post_user)
+
+      tasks = [
+        Task.async(child_proc.(starter.(user, token), hit)),
+        Task.async(child_proc.(starter.(user, token), hit))
+      ]
+
+      {:ok, _} =
+        CommonAPI.post(post_user, %{
+          status: "hi"
+        })
+
+      send_all.(tasks, {StreamerTest, :ready})
+
+      Pleroma.Web.OAuth.Token.Strategy.Revoke.revoke(token)
+
+      send_all.(tasks, {StreamerTest, :revoked})
+
+      Enum.each(tasks, &Task.await/1)
+    end
+  end
 end

test/support/websocket_client.ex

@@ -5,18 +5,17 @@
 defmodule Pleroma.Integration.WebsocketClient do
   # https://github.com/phoenixframework/phoenix/blob/master/test/support/websocket_client.exs
 
+  use WebSockex
+
   @doc """
   Starts the WebSocket server for given ws URL. Received Socket.Message's
   are forwarded to the sender pid
   """
   def start_link(sender, url, headers \\ []) do
-    :crypto.start()
-    :ssl.start()
-
-    :websocket_client.start_link(
-      String.to_charlist(url),
+    WebSockex.start_link(
+      url,
       __MODULE__,
-      [sender],
+      %{sender: sender},
       extra_headers: headers
     )
   end
@@ -36,27 +35,32 @@ defmodule Pleroma.Integration.WebsocketClient do
   end
 
   @doc false
-  def init([sender], _conn_state) do
-    {:ok, %{sender: sender}}
-  end
-
-  @doc false
-  def websocket_handle(frame, _conn_state, state) do
+  @impl true
+  def handle_frame(frame, state) do
     send(state.sender, frame)
     {:ok, state}
   end
 
+  @impl true
+  def handle_disconnect(conn_status, state) do
+    send(state.sender, {:close, conn_status})
+    {:ok, state}
+  end
+
   @doc false
-  def websocket_info({:text, msg}, _conn_state, state) do
+  @impl true
+  def handle_info({:text, msg}, state) do
     {:reply, {:text, msg}, state}
   end
 
-  def websocket_info(:close, _conn_state, _state) do
+  @impl true
+  def handle_info(:close, _state) do
     {:close, <<>>, "done"}
   end
 
   @doc false
-  def websocket_terminate(_reason, _conn_state, _state) do
+  @impl true
+  def terminate(_reason, _state) do
     :ok
   end
 end