Multipart file uploads are very rare in API only apps so don't include...

Multipart file uploads are very rare in API only apps so don't include Rack::TemfileReaper in default middleware stack for API only apps

railties/lib/rails/application/default_middleware_stack.rb

@@ -70,7 +70,8 @@ def build_stack
           middleware.use ::Rack::Head
           middleware.use ::Rack::ConditionalGet
           middleware.use ::Rack::ETag, "no-cache"
-          middleware.use ::Rack::TempfileReaper
+
+          middleware.use ::Rack::TempfileReaper unless config.api_only
         end
       end
 

railties/test/application/middleware_test.rb

@@ -70,8 +70,7 @@ def app
         "ActionDispatch::Callbacks",
         "Rack::Head",
         "Rack::ConditionalGet",
-        "Rack::ETag",
-        "Rack::TempfileReaper"
+        "Rack::ETag"
       ], middleware
     end