The failing url for the Omniauth/open_id/nginx/ssl issue http://stackoverflow.com/questions/10032249/omniauth-and-open-id-with-google-broken-when-running-behind-nginx-in-ssl-mode

gistfile1.txt

https://accounts.google.com/o/openid2/auth?openid.assoc_handle=AMlYA9UJBozPiJiAA8zy3HG1MgQ8g8y3nqPVtMjdoOXutcKd3buWSITu
openid.ax.if_available=ext0,ext1,ext3,ext4,ext7
openid.ax.mode=fetch_request
openid.ax.required=ext2,ext5,ext6,ext8
openid.ax.type.ext0=http://axschema.org/namePerson/friendly
openid.ax.type.ext1=http://axschema.org/media/image/aspect11
openid.ax.type.ext2=http://axschema.org/namePerson/last
openid.ax.type.ext3=http://axschema.org/contact/state/home
openid.ax.type.ext4=http://axschema.org/contact/city/home
openid.ax.type.ext5=http://axschema.org/namePerson/first
openid.ax.type.ext6=http://axschema.org/namePerson
openid.ax.type.ext7=http://axschema.org/contact/web/default
openid.ax.type.ext8=http://axschema.org/contact/email
openid.claimed_id=http://specs.openid.net/auth/2.0/identifier_select
openid.identity=http://specs.openid.net/auth/2.0/identifier_select
openid.mode=checkid_setup
openid.ns=http://specs.openid.net/auth/2.0
openid.ns.ax=http://openid.net/srv/ax/1.0
openid.ns.sreg=http://openid.net/extensions/sreg/1.1
openid.realm=http://localhost:3000
openid.return_to=https://localhost:3000//auth/open_id/callback?_method%3Dpost
openid.sreg.optional=postcode,nickname
openid.sreg.required=email,fullname

When I set openid.realm to equal the openid.return_to param, the request works. This url was sent from the app running at https://localhost:3000/, what gem is setting this url up, ruby-open_id?