For production (or any other environment), run the server with the ALLOWED_ORIGIN environment variable set to the origin that requires access. When the Rails server runs locally, don't specify any environment variable and it defaults to allowing localhost requests. Visits to blog pages are recorded via a POST " ) One of the services is privacy focused analytics. So the blog and Rails server live on different domains. In my case, I have a Rails server that provides some back end services for this blog (which is statically hosted on Github Pages). Otherwise the request will fail due to the Same-origin policy. If you want Javascript from a web page that is hosted on a different domain than your Rails app (or any app actually) to make HTTP API calls to the Rails app, it will require adding CORS support (Cross-Origin Resource Sharing) on the app server. Anyway, just another way to consider.A short post for today on a usage of CORS Middleware for Rails (well any Rack application) that wasn't obvious from the docs - how to specify multiple endpoints, or resources? This removes all the code changes in your Rails app, but also exposes the entire application. If the server is under your control, add the origin of the requesting site to the set of domains permitted access by adding it to the. We set it up in nginx with the following: location / So, this will allow GET or OPTIONS requests from only needed the Authorization/Credentials stuff b/c we were doing Basic Auth in our app as well). The response to the CORS request is missing the required Access-Control-Allow-Origin header, which is used to determine whether or not the resource can be accessed by content operating within the current origin. I know the intention of this post is to outline how to do it within Rails, but if you have control over your web server and want to enable this across your entire app (not a specific action/controller, etc), you can handle it there instead. Wisdom that I'm offering a no-strings-attached, lifetime money back guarantee! Or short blurb RSS feed? I'm so confident you'll love my smelly pasta plate Hey! Why don't you make your life easier and subscribe to the full post He didn't go into detail on restricting access nor routing though, so I felt like this would be a good addendum. Since I don't need to really return a response, I'm only returning the headers indicating success or access denied, but you could just as easily turn those head method calls into renders if you need to render some content.Ī good resource that helped me figure this out was Cross-Origin Resource Sharing for JSON and RAILS. If you do, set the headers and respond appropriately. Controllers should use the methods defined in ActionController::Base. This is even the recommended way according to the documentation, Response is mostly a Ruby on Rails framework implementation detail, and should never be used directly in controllers. Here I've set access_allowed? to always return true, but you could have some checks in there that inspect the request to determine if you want to allow it or not. headers'Header-Name' 'header value' works in controllers. The key above is checking whether or not the request should be allowed. Headers = '*,x-requested-with' end def access_allowed?Īllowed_sites = ] #you might query the DB or something, this is just an example return allowed_sites. # controllers/web_hits_controller.rb class WebHitsController < ApplicationController
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