Fix some to-be-deprecated stuff

app/controllers/file_controller.rb

@@ -111,7 +111,7 @@ class FileController < ApplicationController
   private 
   
   def is_post
-    unless (request.post? || ENV["RAILS_ENV"] == "test")
+    unless (request.post? || Rails.env.test?)
       headers['Allow'] = 'POST'
       render(:status => 405, :text => 'You must use an HTTP POST', :layout => 'error')
       return false