I've been trying to implement basic facebook login into a rails app that already users devise via their tutorial on integrating omniauth-facebook: https://github.com/plataformatec/devise/wiki/OmniAuth:-Overview
However, as far as I can tell after following along with the full setup, I'm stuck with the error in the js console:
XMLHttpRequest cannot load https://www.facebook.com/dialog/oauth?client_id=...
No 'Access-Control-Allow-Origin' header is present on the requested resource.
Origin 'http://localhost:3000' is therefore not allowed access.
I've been stuck all day trying to resolve this, via what is my understanding to be a CORS issue.
However, I've had no success with rack-cors (https://github.com/cyu/rack-cors) and attempting to manually set the headers in the application controller hasn't yielded any results.
I'm unsure where to proceed from here, and somewhat baffled that I haven't come across a solution yet for what must be a pretty standard implementation.
Any help or ideas would be greatly appreciated!
Thanks :)
Try restarting your server. :P
If that doesn't work, install the rack-cors gem and follow the relevant config/application.rb modifications then restart your server.