CODEWITHSUNDEEP
ruby-on-railscorsgrape-api
Prakash Raman
Prakash Raman

Reputation: 13933

Enable CORS in Grape on Rails

I am using Grape on Rails. Although I am unable to set CORS for it.

The rack-cors gem explains how to set it for "Rails" in application.rb. Although does not show how to enable it for Grape on Rails.

Any thoughts ?

Upvotes: 1

Views: 2182

Answers (2)

Mohamed Ziata
Mohamed Ziata

Reputation: 1226

Setting up Rack-CORS

A few easy steps and we'll be ready to go!

Add the following to your Gemfile and bundle install: 

gem 'rack-cors', :require => 'rack/cors'

Add your API module to config/application.rb and configure your Rack-CORS Middleware:

module MyAppRails  
  class Application < Rails::Application
    config.middleware.use Rack::Cors do
      allow do
        origins "*"
        resource "*", headers: :any, methods: [:get, :post, :put, :delete, :options]
      end
    end
    config.active_record.raise_in_transactional_callbacks = true
  end

With origins "*", we specify that our API will accept HTTP requests from any domain in the whole wide internet.

With resource "*", we specify that a cross-origin request can access any of our resources (although we currently only have one––the resource for graduates).

We then specify that a cross-origin request using any HTTP method will be accepted––although, if you recall, we defined our Graduates class inside our API module to respond to only requests for all grads or just one grad. We can add the other HTTP methods later.

Upvotes: 3

mrzasa
mrzasa

Reputation: 23327

You can add headers manually, as suggested in one of grape issues: https://github.com/ruby-grape/grape/issues/170.

I would try to use the rack-cors middleware: either using it directly or wrapping it with a Grape Middleware (http://www.rubydoc.info/github/intridea/grape/Grape/Middleware/Base)

Upvotes: 0

Related Questions