linkedin.rb

require 'sinatra'
require 'oauth2'
require 'rest_client'
require 'json'

get '/' do
  redirect client.auth_code.authorize_url(:redirect_uri => 'http://localhost:4567/callback', :state => 'your_api_is_crap')
end

get '/callback' do
  token = client.auth_code.get_token(params['code'], :redirect_uri => 'http://localhost:4567/callback')
  access_token = OAuth2::AccessToken.new(client, token.token, { :mode => :query,  :param_name => "oauth2_access_token"})
  res = access_token.get('https://api.linkedin.com/v1/company-search', :params => { :keywords => 'angelhack', :format => "json" })
  res.body
end


def client
  key   = 'q4i0tbqcm9ki'
  secret = 'PYmJWSLqcleIyUVr'
  oauth_token = '352e9811-5110-45b0-b531-fe344f44ec78'
  oauth_secret = 'c79ce22c-ff3b-4405-b5c9-30a9c53422ef'
  site  = 'https://www.linkedin.com'
  @client ||= OAuth2::Client.new(key, secret,
                              :site          => site,
                              :authorize_url => '/uas/oauth2/authorization',
                              :token_url     => "/uas/oauth2/accessToken"
                             )
end