Merge branch 'set-omniauth-full-host' into 'master'

Set OmniAuth full_host parameter to ensure redirect URIs are correct

### What does this MR do?

This MR sets the OmniAuth `full_host` parameter to the configured GitLab URL to ensure the `redirect_uri` parameter is called with the right GitLab host.

### Why was this MR needed?

[OmniAuth attempts to grab the request URI](http://awesomeprogrammer.com/blog/2012/12/09/dealing-with-omniauth-redirect-uri-mismatch-invalid-port-number-gotcha/) and use that. If you set up a reverse proxy that terminates SSL at the Web server layer (e.g. https://gitlab.domain.com), omniauth will use the internal URL (e.g. http://my-host:8080) in its redirect URI unless all the Web server headers are properly set (e.g. `X-Forwarded-Port`, etc.). This is easy to forget or mess up, and it's better to ensure that OmniAuth has the right value from the start.

### What are the relevant issue numbers?

Closes #1967

See merge request !991

1 files changed, 1 insertions, 0 deletions

diff --git a/config/initializers/7_omniauth.rb b/config/initializers/7_omniauth.rb
index df73ec1304a..7f73546ac89 100644
--- a/config/initializers/7_omniauth.rb
+++ b/config/initializers/7_omniauth.rb
@@ -11,6 +11,7 @@ if Gitlab::LDAP::Config.enabled?
   end
 end
 
+OmniAuth.config.full_host = Settings.gitlab['url']
 OmniAuth.config.allowed_request_methods = [:post]
 #In case of auto sign-in, the GET method is used (users don't get to click on a button)
 OmniAuth.config.allowed_request_methods << :get if Gitlab.config.omniauth.auto_sign_in_with_provider.present?