Allow to skip cache in Cache plug

Ref: fix-local-public

lib/pleroma/web/plugs/cache.ex

@@ -98,14 +98,19 @@ defmodule Pleroma.Web.Plugs.Cache do
         content_type = content_type(conn)
 
         conn =
-          unless opts[:tracking_fun] do
-            @cachex.put(:web_resp_cache, key, {content_type, body}, ttl: ttl)
-            conn
-          else
-            tracking_fun_data = Map.get(conn.assigns, :tracking_fun_data, nil)
-            @cachex.put(:web_resp_cache, key, {content_type, body, tracking_fun_data}, ttl: ttl)
-
-            opts.tracking_fun.(conn, tracking_fun_data)
+          cond do
+            Map.get(conn.assigns, :skip_cache, false) ->
+              conn
+
+            !opts[:tracking_fun] ->
+              @cachex.put(:web_resp_cache, key, {content_type, body}, ttl: ttl)
+              conn
+
+            true ->
+              tracking_fun_data = Map.get(conn.assigns, :tracking_fun_data, nil)
+              @cachex.put(:web_resp_cache, key, {content_type, body, tracking_fun_data}, ttl: ttl)
+
+              opts.tracking_fun.(conn, tracking_fun_data)
           end
 
         put_resp_header(conn, "x-cache", "MISS from Pleroma")

test/pleroma/web/plugs/cache_test.exs

@@ -179,4 +179,22 @@ defmodule Pleroma.Web.Plugs.CacheTest do
              |> send_resp(:im_a_teapot, "🥤")
              |> sent_resp()
   end
+
+  test "ignores if skip_cache is assigned" do
+    assert @miss_resp ==
+             conn(:get, "/")
+             |> assign(:skip_cache, true)
+             |> Cache.call(%{query_params: false, ttl: nil})
+             |> put_resp_content_type("cofe/hot")
+             |> send_resp(:ok, "cofe")
+             |> sent_resp()
+
+    assert @miss_resp ==
+             conn(:get, "/")
+             |> assign(:skip_cache, true)
+             |> Cache.call(%{query_params: false, ttl: nil})
+             |> put_resp_content_type("cofe/hot")
+             |> send_resp(:ok, "cofe")
+             |> sent_resp()
+  end
 end