github_contoller.rb

class GithubController < ApplicationController
 
  def authorize
    @github = Github.new :client_id => "app_id", :client_secret => "secret_key"
    address = @github.authorize_url :redirect_uri => "http://#{request.host_with_port}/github/callback", :scope => 'repo'
    redirect_to address
  end
 
  def callback
    authorization_code = params[:code].to_s
 
    @github = Github.new :client_id => "app_id", :client_secret => "secret_key"
    token = @github.get_token(authorization_code)
    
    access_token = token.token
    
  # EX: https://api.github.com/user/repos?access_token=xxxxx
    
     response =  RestClient.get("https://api.github.com/user/repos?access_token=#{access_token}")
     datas = JSON.parse(response)
     
     puts "datas : #{datas}" # It will print the whole github response details as a json
   
    redirect_to root_path # any path that you want to redirect the user after importing 
  end
end