Rails: export data to google spreadsheet

I am new to Rails and I want to export data to Google Spread Sheet from my web application.

• I created an app to get client id and client secret and also enable disk api for this.
• I have google drive and google api gmail client installed
• And I used the code given here

This code runs successfully, opens a new login tab and displays the embed code. This is where I got stuck. The code that requires google authorization is in my controller code, so my user can paste that code into my controller. I know its a quiet silly thing to ask, but I don't find a way to automatically get the code from the api for further execution like we usually do in our facebook oauth apps. So can you advise me how to do this? The code looks like

def export_spred_sheet
  require 'rubygems'
  require 'google/api_client'
  require 'launchy'

  # Get your credentials from the console
  CLIENT_ID = 'YOUR_CLIENT_ID'
  CLIENT_SECRET = 'YOUR_CLIENT_SECRET'
  OAUTH_SCOPE = 'https://www.googleapis.com/auth/drive'
  REDIRECT_URI = 'urn:ietf:wg:oauth:2.0:oob'

  # Create a new API client & load the Google Drive API
  client = Google::APIClient.new
  drive = client.discovered_api('drive', 'v2')

  # Request authorization
  client.authorization.client_id = CLIENT_ID
  client.authorization.client_secret = CLIENT_SECRET
  client.authorization.scope = OAUTH_SCOPE
  client.authorization.redirect_uri = REDIRECT_URI

  uri = client.authorization.authorization_uri
  Launchy.open(uri)

  # Exchange authorization code for access token
  $stdout.write  "Enter authorization code: "
  client.authorization.code = gets.chomp
  client.authorization.fetch_access_token!

  # Insert a file
  file = drive.files.insert.request_schema.new({
   'title' => 'My document',
   'description' => 'A test document',
   'mimeType' => 'text/plain'
 })

 media = Google::APIClient::UploadIO.new('document.txt', 'text/plain')
 result = client.execute(
   :api_method => drive.files.insert,
   :body_object => file,
   :media => media,
   :parameters => {
   'uploadType' => 'multipart',
   'alt' => 'json'})

  # Pretty print the API result
  jj result.data.to_hash
end

      

        
        
        
      

    

Or is there any other way to accomplish the task If I'm wrong?