Reconfigure plug at runtime with env

Closes #1165

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/web/endpoint.ex

@@ -64,14 +64,9 @@ defmodule Mobilizon.Web.Endpoint do
   plug(Plug.RequestId)
   plug(Plug.Logger)
 
-  upload_limit =
-    Keyword.get(Application.compile_env(:mobilizon, :instance, []), :upload_limit, 10_485_760)
-
-  plug(
-    Plug.Parsers,
-    parsers: [:urlencoded, {:multipart, length: upload_limit}, :json, Absinthe.Plug.Parser],
-    pass: ["*/*"],
-    json_decoder: Jason
+  plug(Replug,
+    plug: {Plug.Parsers, pass: ["*/*"], json_decoder: Jason},
+    opts: {Mobilizon.Web.PlugConfigs, :parsers}
   )
 
   plug(Plug.MethodOverride)

lib/web/plug_configs.ex

@@ -0,0 +1,14 @@
+defmodule Mobilizon.Web.PlugConfigs do
+  @moduledoc """
+  Runtime configuration for plugs
+  """
+
+  def parsers do
+    upload_limit =
+      Keyword.get(Application.get_env(:mobilizon, :instance, []), :upload_limit, 10_485_760)
+
+    [
+      parsers: [:urlencoded, {:multipart, length: upload_limit}, :json, Absinthe.Plug.Parser]
+    ]
+  end
+end