Omniauth sign in adds extra port to auth url

Question

I am using the omniauth-facebook, omniauth-twitter, omniauth-google-oauth2 gems
for signing in, on localhost everything works fine, but in production it adds the port number 5050 to the authorization url, has anybody encountered this problem? My site url is addthis.com

Twitter url

http://addthis.com:5050/users/auth/twitter/callback?oauth_token=krnYyA5BzM4JlCc5XVxuhsdfspArsdfgtkrUzajMts&oauth_verifier=MjLR9fPSV7aWThOe80oDuPBpB6pvVdBijKMMLdxifR4

Facebook url:

https://www.facebook.com/dialog/oauth?client_id=213027215529249&redirect_uri=http%3A%2F%2Faddthis.com%3A5050%2Fusers%2Fauth%2Ffacebook%2Fcallback&response_type=code&scope=email&state=1bf3f21df9be97337asdfasdfsda4995bdf9982f321d

Google url

The redirect URI in the request: http://addthis.com:5050/users/auth/google_oauth2/callback did not match a registered redirect URI

Answer 1

Omniauth in response included port used internally by nginx
this blog helped me a lot http://awesomeprogrammer.com/blog/2012/12/09/dealing-with-omniauth-redirect-uri-mismatch-invalid-port-number-gotcha/