Rails: OAuth::Unauthorized 401 Authorization Required using OmniAuth-Twitter - ruby-on-rails-3

Question

I have implemented several different strategies found in StackOverFlow, but so far, none seem to affect the error being thrown:
OAuth::Unauthorized
401 Authorization Required
I am following Ryan Bates' RC #241 and get to the point where I click "Sign-in with Twitter" and I get the error. I went ahead and added the response route to the routes.rb file as listed here:
routes.rb:
match 'auth/twitter/callback', to: 'user#update'
thinking that the error might be caused from the callback function. Same error. A look at my dev.log shows this:
Started GET "/auth/twitter" for 127.0.0.1 at 2014-09-16 18:52:08 -0600
(twitter) Request phase initiated.
OAuth::Unauthorized (401 Authorization Required):
oauth (0.4.7) lib/oauth/consumer.rb:216:in `token_request'
oauth (0.4.7) lib/oauth/consumer.rb:136:in `get_request_token'
omniauth-oauth (1.0.1) lib/omniauth/strategies/oauth.rb:29:in `request_phase'
omniauth-twitter (1.0.1) lib/omniauth/strategies/twitter.rb:60:in `request_phase'
omniauth (1.2.2) lib/omniauth/strategy.rb:215:in `request_call'
omniauth (1.2.2) lib/omniauth/strategy.rb:183:in `call!'
omniauth (1.2.2) lib/omniauth/strategy.rb:164:in `call'
omniauth (1.2.2) lib/omniauth/builder.rb:59:in `call'
...
script/rails:6:in `require'
script/rails:6:in `<top (required)>'
-e:1:in `load'
-e:1:in `<main>'
So I know the issue is with the authentication with Twitter going out. Must be the KEY and SECRET, right?
Now, I have put the KEY and SECRET in as ENV[] variables, as direct strings to the environment/development.rb file, taken out the "ENV[]" variables, etc., as per suggestions found all over Stack.
My KEY and SECRET now reside in a custom configuration as discussed here...
config/initializers/social_media.rb:
TWITTER_CONFIG = YAML.load_file("#{::Rails.root}/config/twitter.yml")[::Rails.env]
The config/initializers/omniauth.rb file:
OmniAuth.config.logger = Rails.logger
Rails.application.config.middleware.use OmniAuth::Builder do
provider :twitter, TWITTER_CONFIG['app_id'], TWITTER_CONFIG['secret']
end
Any ideas on the ActionController: Exception caught OAuth::Unauthorized - 401 Authorization Required? This is probably a Noob error, but my Google-Fu is just Google-F'ed right now...

Answer 1

After a night of tearing my hair out, I took at look at the callback URL on Twitter developer console.
Save yourselves some trouble and don't forget to set this. It's not mentioned directly in the RailsCast, although Ryan does briefly pass over it.
When you set the callback URL, don't just put //localhost:3000 it won't work. Instead use:
http://127.0.0.1:3000/

Answer 2

I had this same issue when working on a Rails 6 application with omniauth-twitter and devise gems
I had added the API Key and the API Secret Key to my Rails 6 application, but when I try to test the Twitter Authentication, I run into the error below:
OAuth::Unauthorized 401 Authorization Required
Here's how I solved it:
I added the following Callback URLs to my Twitter developer account:
http://localhost:3000/auth/twitter
http://localhost:3000/auth/twitter/callback
http://localhost:3000/users/auth/twitter
http://localhost:3000/users/auth/twitter/callback
Note: Replace localhost:3000 with your actual host. Also, the routes used for the callback URLs should match the ones that were set up in your application.
Resources: How to Sign in with Twitter using Devise, Omniauth, and Ruby on Rails
That's all.
I hope this helps