Merge branch 'idempotency-plug' into 'develop'

Add IdempotencyPlug and use it in all of the api

Closes #1003

See merge request pleroma/pleroma!1339

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -561,18 +561,13 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
     else
       params = Map.drop(params, ["scheduled_at"])
 
-      case get_cached_status_or_post(conn, params) do
-        {:ignore, message} ->
-          conn
-          |> put_status(422)
-          |> json(%{error: message})
-
+      case CommonAPI.post(user, params) do
         {:error, message} ->
           conn
-          |> put_status(422)
+          |> put_status(:unprocessable_entity)
           |> json(%{error: message})
 
-        {_, activity} ->
+        {:ok, activity} ->
           conn
           |> put_view(StatusView)
           |> try_render("status.json", %{activity: activity, for: user, as: :activity})
@@ -580,21 +575,6 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
     end
   end
 
-  defp get_cached_status_or_post(%{assigns: %{user: user}} = conn, params) do
-    idempotency_key =
-      case get_req_header(conn, "idempotency-key") do
-        [key] -> key
-        _ -> Ecto.UUID.generate()
-      end
-
-    Cachex.fetch(:idempotency_cache, idempotency_key, fn _ ->
-      case CommonAPI.post(user, params) do
-        {:ok, activity} -> activity
-        {:error, message} -> {:ignore, message}
-      end
-    end)
-  end
-
   def delete_status(%{assigns: %{user: user}} = conn, %{"id" => id}) do
     with {:ok, %Activity{}} <- CommonAPI.delete(id, user) do
       json(conn, %{})

lib/pleroma/web/router.ex

@@ -27,6 +27,7 @@ defmodule Pleroma.Web.Router do
     plug(Pleroma.Plugs.UserEnabledPlug)
     plug(Pleroma.Plugs.SetUserSessionIdPlug)
     plug(Pleroma.Plugs.EnsureUserKeyPlug)
+    plug(Pleroma.Plugs.IdempotencyPlug)
   end
 
   pipeline :authenticated_api do
@@ -41,6 +42,7 @@ defmodule Pleroma.Web.Router do
     plug(Pleroma.Plugs.UserEnabledPlug)
     plug(Pleroma.Plugs.SetUserSessionIdPlug)
     plug(Pleroma.Plugs.EnsureAuthenticatedPlug)
+    plug(Pleroma.Plugs.IdempotencyPlug)
   end
 
   pipeline :admin_api do
@@ -57,6 +59,7 @@ defmodule Pleroma.Web.Router do
     plug(Pleroma.Plugs.SetUserSessionIdPlug)
     plug(Pleroma.Plugs.EnsureAuthenticatedPlug)
     plug(Pleroma.Plugs.UserIsAdminPlug)
+    plug(Pleroma.Plugs.IdempotencyPlug)
   end
 
   pipeline :mastodon_html do