1 files changed, 32 insertions, 19 deletions
diff --git a/lib/pleroma/web/oauth/oauth_controller.ex b/lib/pleroma/web/oauth/oauth_controller.ex
index 5441ee0a8..d03c8b05a 100644
--- a/lib/pleroma/web/oauth/oauth_controller.ex
+++ b/lib/pleroma/web/oauth/oauth_controller.ex
@@ -33,25 +33,35 @@ defmodule Pleroma.Web.OAuth.OAuthController do
          true <- Pbkdf2.checkpw(password, user.password_hash),
          %App{} = app <- Repo.get_by(App, client_id: client_id),
          {:ok, auth} <- Authorization.create_authorization(app, user) do
-      if redirect_uri == "urn:ietf:wg:oauth:2.0:oob" do
-        render(conn, "results.html", %{
-          auth: auth
-        })
-      else
-        connector = if String.contains?(redirect_uri, "?"), do: "&", else: "?"
-        url = "#{redirect_uri}#{connector}"
-        url_params = %{:code => auth.token}
-
-        url_params =
-          if params["state"] do
-            Map.put(url_params, :state, params["state"])
-          else
-            url_params
-          end
-
-        url = "#{url}#{Plug.Conn.Query.encode(url_params)}"
-
-        redirect(conn, external: url)
+      # Special case: Local MastodonFE.
+      redirect_uri =
+        if redirect_uri == "." do
+          mastodon_api_url(conn, :login)
+        else
+          redirect_uri
+        end
+
+      cond do
+        redirect_uri == "urn:ietf:wg:oauth:2.0:oob" ->
+          render(conn, "results.html", %{
+            auth: auth
+          })
+
+        true ->
+          connector = if String.contains?(redirect_uri, "?"), do: "&", else: "?"
+          url = "#{redirect_uri}#{connector}"
+          url_params = %{:code => auth.token}
+
+          url_params =
+            if params["state"] do
+              Map.put(url_params, :state, params["state"])
+            else
+              url_params
+            end
+
+          url = "#{url}#{Plug.Conn.Query.encode(url_params)}"
+
+          redirect(conn, external: url)
       end
     end
   end
@@ -133,8 +143,11 @@ defmodule Pleroma.Web.OAuth.OAuthController do
     end
   end
 
+  # XXX - for whatever reason our token arrives urlencoded, but Plug.Conn should be
+  # decoding it.  Investigate sometime.
   defp fix_padding(token) do
     token
+    |> URI.decode()
     |> Base.url_decode64!(padding: false)
     |> Base.url_encode64()
   end