Add ability to get params from request and pass thru to keycloak url

[ccrockett]

added the ability to put authorize_options keys in the setup, then pass those request params thru to keycloak

config/initializers/omniauth.rb:

Rails.application.config.middleware.use OmniAuth::Builder do
  provider :keycloak_openid, 'myclient', '',
    client_options: {scope: [:user], site: 'http://localhost:8080', realm: 'myrealm', base_url: ''},
    authorize_options: [:ui_locale],
    name: 'keycloak'
end

app/views/logins/index.html.erb:

<%= form_tag('/auth/keycloak', method: 'post', data: {turbo: false}) do %>
  <%= hidden_field_tag :ui_locale, 'en' %>
  <button type='submit'>Login with Keycloak</button>
<% end %>

[nlsrchtr]

@ccrockett Would be great to see this merged or is there anything holding this back? When I reference this, I get a version downgrade to omniauth 2.0.4, from 2.1.1.

Thanks for your effort!

[nlsrchtr]

BTW: AFAIK the param for the locale is named ui_locales. At least this works with a direct-link to the registrations endpoint.

[ccrockett]

I created this solution and then never got back around to testing it to merge it in. Thanks for testing and commented. I've merged this into release version 1.5.1 of the gem.