How to pass extra parameters?

[chamnap]

I'm digging and trying to find solutions for several hours, but i got no luck. I hope I can have answer here.

I checked the gem 'omniauth', we can pass extra parameters like this:
/auth/facebook?listing_id=kh35887

And inside the callback phase, we can retrieve this parameter by calling #params or request.env['omniauth.params'], https://github.com/intridea/omniauth/blob/fc304abe2b56cb6efeff87efdc50d120f4d8e1c0/lib/omniauth/strategy.rb#L225.

/auth/facebook/callback?listing_id=kh35887

I tried this with the gem omniauth-twitter, and it works as expected. However, omniauth-facebook doesn't work with this extra parameters.

[chamnap]

After debugging, it turns out that it's the not the fault of omniauth-facebook. It's because omniauth-oauth2 overrides #callback_url so it loses the querystring.

omniauth/omniauth-oauth2#28

[nratter]

request.env['omniauth.params'] is working for me