Merged r22698 from trunk to 5.0-stable (#40208).

git-svn-id: https://svn.redmine.org/redmine/branches/5.0-stable@22700 e93f8b46-1217-0410-a6f0-8f06a7374b81

config/routes.rb

@@ -397,7 +397,7 @@ Rails.application.routes.draw do
 
   match 'uploads', :to => 'attachments#upload', :via => :post
 
-  get 'robots', :to => 'welcome#robots'
+  get 'robots.:format', :to => 'welcome#robots', :constraints => {:format => 'txt'}
 
   Dir.glob File.expand_path("#{Redmine::Plugin.directory}/*") do |plugin_dir|
     file = File.join(plugin_dir, "config/routes.rb")

test/integration/welcome_test.rb

@@ -37,4 +37,11 @@ class WelcomeTest < Redmine::IntegrationTest
     assert @response.body.match(%r{^Disallow: /account/register\r?$})
     assert @response.body.match(%r{^Disallow: /account/lost_password\r?$})
   end
+
+  def test_robots_should_not_respond_to_formats_other_than_txt
+    %w(robots.json robots).each do |file|
+      get "/#{file}"
+      assert_response :not_found
+    end
+  end
 end