Allow alternate domains for mastodon handlers (#3187)

1 files changed, 8 insertions, 1 deletions

diff --git a/app/controllers/well_known/webfinger_controller.rb b/app/controllers/well_known/webfinger_controller.rb
index 4a521d102..84f3015e8 100644
--- a/app/controllers/well_known/webfinger_controller.rb
+++ b/app/controllers/well_known/webfinger_controller.rb
@@ -23,7 +23,14 @@ module WellKnown
     private
 
     def username_from_resource
-      WebfingerResource.new(resource_param).username
+      resource_user = resource_param
+
+      username, domain = resource_user.split('@')
+      if Rails.configuration.x.alternate_domains.include?(domain)
+        resource_user = "#{username}@#{Rails.configuration.x.local_domain}"
+      end
+
+      WebfingerResource.new(resource_user).username
     end
 
     def pem_to_magic_key(public_key)