2 files changed, 76 insertions, 8 deletions
diff --git a/lib/pleroma/plugs/oauth_plug.ex b/lib/pleroma/plugs/oauth_plug.ex
index 9d43732eb..86bc4aa3a 100644
--- a/lib/pleroma/plugs/oauth_plug.ex
+++ b/lib/pleroma/plugs/oauth_plug.ex
@@ -8,6 +8,7 @@ defmodule Pleroma.Plugs.OAuthPlug do
 
   alias Pleroma.Repo
   alias Pleroma.User
+  alias Pleroma.Web.OAuth.App
   alias Pleroma.Web.OAuth.Token
 
   @realm_reg Regex.compile!("Bearer\:?\s+(.*)$", "i")
@@ -22,18 +23,39 @@ defmodule Pleroma.Plugs.OAuthPlug do
       |> assign(:token, token_record)
       |> assign(:user, user)
     else
-      _ -> conn
+      _ ->
+        # token found, but maybe only with app
+        with {:ok, app, token_record} <- fetch_app_and_token(access_token) do
+          conn
+          |> assign(:token, token_record)
+          |> assign(:app, app)
+        else
+          _ -> conn
+        end
     end
   end
 
   def call(conn, _) do
-    with {:ok, token_str} <- fetch_token_str(conn),
-         {:ok, user, token_record} <- fetch_user_and_token(token_str) do
-      conn
-      |> assign(:token, token_record)
-      |> assign(:user, user)
-    else
-      _ -> conn
+    case fetch_token_str(conn) do
+      {:ok, token} ->
+        with {:ok, user, token_record} <- fetch_user_and_token(token) do
+          conn
+          |> assign(:token, token_record)
+          |> assign(:user, user)
+        else
+          _ ->
+            # token found, but maybe only with app
+            with {:ok, app, token_record} <- fetch_app_and_token(token) do
+              conn
+              |> assign(:token, token_record)
+              |> assign(:app, app)
+            else
+              _ -> conn
+            end
+        end
+
+      _ ->
+        conn
     end
   end
 
@@ -54,6 +76,16 @@ defmodule Pleroma.Plugs.OAuthPlug do
     end
   end
 
+  @spec fetch_app_and_token(String.t()) :: {:ok, App.t(), Token.t()} | nil
+  defp fetch_app_and_token(token) do
+    query =
+      from(t in Token, where: t.token == ^token, join: app in assoc(t, :app), preload: [app: app])
+
+    with %Token{app: app} = token_record <- Repo.one(query) do
+      {:ok, app, token_record}
+    end
+  end
+
   # Gets token from session by :oauth_token key
   #
   @spec fetch_token_from_session(Plug.Conn.t()) :: :no_token_found | {:ok, String.t()}
diff --git a/lib/pleroma/plugs/rate_limit_plug.ex b/lib/pleroma/plugs/rate_limit_plug.ex
new file mode 100644
index 000000000..466f64a79
--- /dev/null
+++ b/lib/pleroma/plugs/rate_limit_plug.ex
@@ -0,0 +1,36 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Plugs.RateLimitPlug do
+  import Phoenix.Controller, only: [json: 2]
+  import Plug.Conn
+
+  def init(opts), do: opts
+
+  def call(conn, opts) do
+    enabled? = Pleroma.Config.get([:app_account_creation, :enabled])
+
+    case check_rate(conn, Map.put(opts, :enabled, enabled?)) do
+      {:ok, _count} -> conn
+      {:error, _count} -> render_error(conn)
+      %Plug.Conn{} = conn -> conn
+    end
+  end
+
+  defp check_rate(conn, %{enabled: true} = opts) do
+    max_requests = opts[:max_requests]
+    bucket_name = conn.remote_ip |> Tuple.to_list() |> Enum.join(".")
+
+    ExRated.check_rate(bucket_name, opts[:interval] * 1000, max_requests)
+  end
+
+  defp check_rate(conn, _), do: conn
+
+  defp render_error(conn) do
+    conn
+    |> put_status(:forbidden)
+    |> json(%{error: "Rate limit exceeded."})
+    |> halt()
+  end
+end