Rails 5.0.0 - Access-Control-Allow-Origin

Hello,

I run rails 5.0 on heroku and i’ve followed all steps but the following error persists:

No ‘Access-Control-Allow-Origin’ header is present on the requested resource. Origin ‘http://kabrabom.herokuapp.com’ is therefore not allowed access.

File config.ru:

use Rack::Cors do
  allow do
    origins 'localhost:3000', '127.0.0.1:3000',
            /\Ahttp:\/\/192\.168\.0\.\d{1,3}(:\d+)?\z/
    resource '/file/list_all/', :headers => 'x-domain-token'
    resource '/file/at/*',
        :methods => [:get, :post, :delete, :put, :patch, :options, :head],
        :headers => 'x-domain-token',
        :expose  => ['Some-Custom-Response-Header'],
        :max_age => 600

  end
  allow do
    origins '*'
    resource '/public/*', :headers => :any, :methods => :get
  end
end

File config/application.rb:

config.middleware.insert_before 0, Rack::Cors do
      allow do
        origins '*'
        resource '*', :headers => :any, :methods => [:get, :post, :options]
      end
    end

Middleware output:

use Rack::Cors
use Rack::Sendfile
use ActionDispatch::Static
use ActionDispatch::Executor
use ActiveSupport::Cache::Strategy::LocalCache::Middleware
use Rack::Runtime
use Rack::MethodOverride
use ActionDispatch::RequestId
use Rails::Rack::Logger
use ActionDispatch::ShowExceptions
use ActionDispatch::DebugExceptions
use ActionDispatch::RemoteIp
use ActionDispatch::Callbacks
use ActionDispatch::Cookies
use ActionDispatch::Session::CookieStore
use ActionDispatch::Flash
use Rack::Head
use Rack::ConditionalGet
use Rack::ETag
use Warden::Manager
run Kabrabom::Application.routes

Postman’s plugin results:

Accept:text/javascript, application/javascript, application/ecmascript, application/x-ecmascript, */*; q=0.01
X-DevTools-Emulate-Network-Conditions-Client-Id:747d2432-8d59-43e3-aa3e-62baac1833ca,747d2432-8d59-43e3-aa3e-62baac1833ca
Origin:http://kabrabom.herokuapp.com
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36
Referer:http://kabrabom.herokuapp.com/professional_professions/new?_sm_au_=iFVn48qbQPRVWLGM
Accept-Encoding:gzip, deflate, sdch, br
Accept-Language:pt-BR,pt;q=0.8,en-US;q=0.6,en;q=0.4

Important: I am connected by my company’s proxy.

I d really thankfull if you @cyu can help me.

Thanks!!!

[niketa741]

@vlbgomes Were you able to resolve your issue? Please tell me if you did, I am facing the same problem.

[cyu]

I’m closing this issue because of inactivity from the original submitter.

If you’re still having problems. Please create a new issue and provide the specifics.