Railsサーバーの開始エラー。より限定的な起点を指定してくださいCORSの設定

Question

Ubuntuでレールサーバーを起動しようとするとエラーが発生します。 （コマンド 'sudo rails server'）

私は変更ローカライズ設定を試してみます。管理パネルの設定でデフォルト言語を削除します。

Exiting 
/var/lib/gems/2.3.0/gems/rack-cors-1.0.2/lib/rack/cors.rb:331:in `initialize': Allowing credentials for wildcard origins is insecure. Please specify more restrictive origins or set 'credentials' to false in your CORS configuration. (Rack::Cors::Resource::CorsMisconfigurationError) 
     from /var/lib/gems/2.3.0/gems/rack-cors-1.0.2/lib/rack/cors.rb:291:in `new' 
     from /var/lib/gems/2.3.0/gems/rack-cors-1.0.2/lib/rack/cors.rb:291:in `resource' 
     from /var/www/myshop/angularspree-api/config/application.rb:43:in `block (2 levels) in <class:Application>' 
     from /var/lib/gems/2.3.0/gems/rack-cors-1.0.2/lib/rack/cors.rb:62:in `instance_eval' 
     from /var/lib/gems/2.3.0/gems/rack-cors-1.0.2/lib/rack/cors.rb:62:in `allow' 
     from /var/www/myshop/angularspree-api/config/application.rb:40:in `block in <class:Application>' 
     from /var/lib/gems/2.3.0/gems/rack-cors-1.0.2/lib/rack/cors.rb:47:in `instance_eval' 
     from /var/lib/gems/2.3.0/gems/rack-cors-1.0.2/lib/rack/cors.rb:47:in `initialize' 
     from /var/lib/gems/2.3.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/stack.rb:43:in `new' 
     from /var/lib/gems/2.3.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/stack.rb:43:in `build' 
     from /var/lib/gems/2.3.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/stack.rb:118:in `block in build' 
     from /var/lib/gems/2.3.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/stack.rb:118:in `each' 
     from /var/lib/gems/2.3.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/stack.rb:118:in `inject' 
     from /var/lib/gems/2.3.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/stack.rb:118:in `build' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/engine.rb:502:in `app' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/application/finisher.rb:34:in `block in <module:Finisher>' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `instance_exec' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `run' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:55:in `block in run_initializers' 
     from /usr/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each' 
     from /usr/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component' 
     from /usr/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from' 
     from /usr/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component' 
     from /usr/lib/ruby/2.3.0/tsort.rb:347:in `each' 
     from /usr/lib/ruby/2.3.0/tsort.rb:347:in `call' 
     from /usr/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component' 
     from /usr/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each' 
     from /usr/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:54:in `run_initializers' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/application.rb:352:in `initialize!' 
     from /var/www/myshop/angularspree-api/config/environment.rb:5:in `<top (required)>' 
     from /var/lib/gems/2.3.0/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require' 
     from /var/lib/gems/2.3.0/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require' 
     from /var/lib/gems/2.3.0/gems/activesupport-4.2.6/lib/active_support/dependencies.rb:274:in `block in require' 
     from /var/lib/gems/2.3.0/gems/activesupport-4.2.6/lib/active_support/dependencies.rb:240:in `load_dependency' 
     from /var/lib/gems/2.3.0/gems/activesupport-4.2.6/lib/active_support/dependencies.rb:274:in `require' 
     from /var/www/myshop/angularspree-api/config.ru:3:in `block in <main>' 
     from /var/lib/gems/2.3.0/gems/rack-1.6.8/lib/rack/builder.rb:55:in `instance_eval' 
     from /var/lib/gems/2.3.0/gems/rack-1.6.8/lib/rack/builder.rb:55:in `initialize' 
     from /var/www/myshop/angularspree-api/config.ru:in `new' 
     from /var/www/myshop/angularspree-api/config.ru:in `<main>' 
     from /var/lib/gems/2.3.0/gems/rack-1.6.8/lib/rack/builder.rb:49:in `eval' 
     from /var/lib/gems/2.3.0/gems/rack-1.6.8/lib/rack/builder.rb:49:in `new_from_string' 
     from /var/lib/gems/2.3.0/gems/rack-1.6.8/lib/rack/builder.rb:40:in `parse_file' 
     from /var/lib/gems/2.3.0/gems/rack-1.6.8/lib/rack/server.rb:300:in `build_app_and_options_from_config' 
     from /var/lib/gems/2.3.0/gems/rack-1.6.8/lib/rack/server.rb:209:in `app' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/server.rb:61:in `app' 
     from /var/lib/gems/2.3.0/gems/rack-1.6.8/lib/rack/server.rb:337:in `wrapped_app' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/server.rb:139:in `log_to_stdout' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/server.rb:78:in `start' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:80:in `block in server' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `tap' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `server' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:39:in `run_command!' 
     from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands.rb:17:in `<top (required)>' 
     from /var/www/myshop/angularspree-api/bin/rails:9:in `require' 
     from /var/www/myshop/angularspree-api/bin/rails:9:in `<top (required)>' 
     from /var/lib/gems/2.3.0/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `load' 
     from /var/lib/gems/2.3.0/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `call' 
     from /var/lib/gems/2.3.0/gems/spring-2.0.2/lib/spring/client/command.rb:7:in `call' 
     from /var/lib/gems/2.3.0/gems/spring-2.0.2/lib/spring/client.rb:30:in `run' 
     from /var/lib/gems/2.3.0/gems/spring-2.0.2/bin/spring:49:in `<top (required)>' 
     from /var/lib/gems/2.3.0/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `load' 
     from /var/lib/gems/2.3.0/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `<top (required)>' 
     from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require' 
     from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require' 
     from /var/www/myshop/angularspree-api/bin/spring:15:in `<top (required)>' 
     from bin/rails:3:in `load' 
     from bin/rails:3:in `<main>' 

Answer 1

ワイルドカードの起点エラーが表示されます。これは、CORS設定でワイルドカードセグメントを使用している可能性が最も高いことを意味します。 Corsのワイルドカードセグメントを指定しようとすると、設定でregexを使用する必要があります。ような何か：

のconfig/application.rbのサブドメインが含まれます

config.middleware.use Rack::Cors do 
    allow do 
    origins /http:\/\/(.*?)\.example\.com/ 
    resource '*', :headers => :any, :methods => [:get, :post, :options] 
    end 
end 

。 参考：https://web-in-security.blogspot.de/2017/07/cors-misconfigurations-on-large-scale.html他のさまざまな誤った設定エラーに関する情報。