问题
I'm using omniauth with devise and I'm wondering how to pass url params and access them.
Here's a link example: /accounts/auth/facebook?do_something_after_return=1
Now I want to be able to retrieve this do_something_after_return in the callback. I don't care if it's saved in session or elsewhere. Problem is, I don't know where can I intercept this param.
What is the controller and the action that link /accounts/auth/facebook points to?
Routes tell me nothing, it's simply not there. All I have in the routes is this /accounts/auth/:provider(.:format {:controller=>"accounts/omniauth_callbacks", :action=>"passthru"} which is a callback.
回答1:
Params are captured in env["omniauth.params"].
来源：https://stackoverflow.com/questions/7999907/passing-random-url-params-to-omniauth