omniauth-oauth2 1.4 compatibility

[chussenot]

Hi there,

we have error on the callback with the omniauth-oauth2 gem in version 1.4 so we lock it in our rails application.

$> Gemfile

 52 group :auth do
 53   gem 'devise',                   '~> 4.2'
 54   gem 'devise-i18n'               # Only yaml files
 55   gem 'omniauth',                 '~> 1.3'
 56   gem 'omniauth-facebook',        '~> 4.0'
 57   gem 'linkedin'
 58   gem 'omniauth-linkedin-oauth2', branch: 'master'
 59   gem 'omniauth-oauth',           '1.1'
 60   gem 'omniauth-oauth2',          '=1.2'
 61 end

$> config/initializers/devise.rb

264   config.omniauth :linkedin,
265     Gaston.providers.linkedin.api_key, Gaston.providers.linkedin.secret_key,
266     scope: 'r_emailaddress r_basicprofile'

With omniauth-oauth2 1.4 we have this error in application server logs

E, [2016-08-04T10:50:15.569508 #32664] ERROR -- omniauth: (linkedin) Authentication failure! invalid_credentials: OAuth2::Error, invalid_request: missing required parameters, includes an invalid parameter value, parameter more than once. : Unable to retrieve access token : appId or redirect uri does not match authorization code or authorization code expired
{"error_description":"missing required parameters, includes an invalid parameter value, parameter more than once. : Unable to retrieve access token : appId or redirect uri does not match authorization code or authorization code expired","error":"invalid_request"}

Missing something ?

[chussenot]

Maybe a related post here....
http://stackoverflow.com/questions/23578439/linkedin-oauth-2-issue-with-client-id-parameter

[chussenot]

Ok same issue #31
Sorry !

[chussenot]

https://github.com/mkdynamic/omniauth-facebook/blob/master/lib/omniauth/strategies/facebook.rb#L83