LinkedIn OAuth2 flow with POST to /accessToken

gistfile1.rb

def index
    authorize_oauth2
end

def authorize_oauth2   
     # Redirect to /authorization endpoint
     redirect_to client.auth_code.authorize_url(:state => 'thisisatest', :redirect_uri => REDIRECT_URI)
end

def accept
    # Strip out auth code from session param
    code = params[:code]
    
    authorize_user(code) 
end
  
def authorize_user(code)
    # Build out URI
    uri = URI('https://www.linkedin.com/uas/oauth2/accessToken')             
    linkedin_uri = URI.parse('https://www.linkedin.com/uas/oauth2/accessToken')          
    https = Net::HTTP.new(linkedin_uri.host, linkedin_uri.port)    
    https.use_ssl = true                                                         
    https.verify_mode = OpenSSL::SSL::VERIFY_NONE
         
    # make POST call to /accessToken endpoint                       
    postData = https.request_post(linkedin_uri.path,'grant_type=authorization_code&code='+ code +'&redirect_uri=http%3A%2F%2F0.0.0.0%3A3000%2Faccept&client_id=75y05cochdr69u&client_secret=rZ1bUz8om3yaXFw2')                                  

    # Put data into hash and display in console - let's see the response header
    puts postData.to_hash
    body = JSON.parse(postData.body)

    # Extract access token
    token = body["access_token"]
    
    response = https.request_get('https://api.linkedin.com/v1/people/~:(first-name)?oauth2_access_token='+ token)
    puts response.body
end