Fix nonexisting user will not generate metadata for search engine opt-out

changelog.d/se-opt-out.change

@@ -0,0 +1 @@
+Fix nonexisting user will not generate metadata for search engine opt-out

lib/pleroma/web/fallback/redirect_controller.ex

@@ -46,7 +46,7 @@ def redirector_with_meta(conn, %{"maybe_nickname_or_id" => maybe_nickname_or_id}
       redirector_with_meta(conn, %{user: user})
     else
       nil ->
-        redirector(conn, params)
+        redirector_with_meta(conn, Map.delete(params, "maybe_nickname_or_id"))
     end
   end
 

lib/pleroma/web/feed/user_controller.ex

@@ -15,11 +15,11 @@ defmodule Pleroma.Web.Feed.UserController do
 
   action_fallback(:errors)
 
-  def feed_redirect(%{assigns: %{format: "html"}} = conn, %{"nickname" => nickname}) do
+  def feed_redirect(%{assigns: %{format: "html"}} = conn, %{"nickname" => nickname} = params) do
     with {_, %User{} = user} <- {:fetch_user, User.get_cached_by_nickname_or_id(nickname)} do
       Pleroma.Web.Fallback.RedirectController.redirector_with_meta(conn, %{user: user})
     else
-      _ -> Pleroma.Web.Fallback.RedirectController.redirector(conn, nil)
+      _ -> Pleroma.Web.Fallback.RedirectController.redirector_with_meta(conn, params)
     end
   end
 

lib/pleroma/web/metadata/providers/feed.ex

@@ -20,4 +20,7 @@ def build_tags(%{user: user}) do
        ], []}
     ]
   end
+
+  @impl Provider
+  def build_tags(_), do: []
 end

lib/pleroma/web/metadata/providers/open_graph.ex

@@ -67,6 +67,9 @@ def build_tags(%{user: user}) do
     end
   end
 
+  @impl Provider
+  def build_tags(_), do: []
+
   defp build_attachments(%{data: %{"attachment" => attachments}}) do
     Enum.reduce(attachments, [], fn attachment, acc ->
       rendered_tags =

lib/pleroma/web/metadata/providers/rel_me.ex

@@ -20,6 +20,9 @@ def build_tags(%{user: user}) do
     end)
   end
 
+  @impl Provider
+  def build_tags(_), do: []
+
   defp append_fields_tag(bio, fields) do
     fields
     |> Enum.reduce(bio, fn %{"value" => v}, res -> res <> v end)

lib/pleroma/web/metadata/providers/twitter_card.ex

@@ -44,6 +44,9 @@ def build_tags(%{user: user}) do
     end
   end
 
+  @impl Provider
+  def build_tags(_), do: []
+
   defp title_tag(user) do
     {:meta, [name: "twitter:title", content: Utils.user_name_string(user)], []}
   end

test/pleroma/web/fallback_test.exs

@@ -32,7 +32,7 @@ test "GET /:maybe_nickname_or_id with missing user", %{conn: conn} do
       resp = get(conn, "/foo")
 
       assert html_response(resp, 200) =~ "<title>a cool title</title>"
-      refute html_response(resp, 200) =~ "initial-results"
+      assert html_response(resp, 200) =~ "<meta content=\"noindex, noarchive\" name=\"robots\">"
     end
 
     test "GET /*path", %{conn: conn} do

test/pleroma/web/feed/user_controller_test.exs

@@ -147,6 +147,15 @@ test "returns 404 for a missing feed", %{conn: conn} do
       assert response(conn, 404)
     end
 
+    test "returns noindex meta for missing user", %{conn: conn} do
+      conn =
+        conn
+        |> put_req_header("accept", "text/html")
+        |> get("/users/nonexisting")
+
+      assert html_response(conn, 200) =~ "<meta content=\"noindex, noarchive\" name=\"robots\">"
+    end
+
     test "returns feed with public and unlisted activities", %{conn: conn} do
       user = insert(:user)