Rails: Export data in google spreadsheet - ruby-on-rails

Question

I am new to Rails and I want to export data to Google Spread Sheet from my web application.
I have created an app to get client id and client secret and enabled drive api for that.
I have installed google drive and google api client gem
And I used the code stated here
This code successfully runs, open a new tab for authorization, and displays a code to paste. This is the point where I am stuck. The code that google authorization demands is in my controller code so my user can paste that code in my controller. I know its quiet stupid thing to ask but I am not finding a way to automatically get the code from api to further execution as we usually do in our facebook oauth applications. So can you guide me how to do it? 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 do the task If I am on wrong track?

Answer 1

I was also fighting against this in one of my project and finally I found soulution as follows:
Instead of using client ID and client secrete you can use P12 key generated in google developer console under service account for authentication. In this case you won't need to paste any code in controller.
To generate p12 key
go to Google developer console
then -> "APIs & Auth" -> "Credentials"
Create New Client ID of type 'Service Account'
Once new client Id generated. Under Service Account section you will find a button to 'generate new P12 key'. On click it will generate a p12 key. Download it and store it securely in your app and use it for authentication.
And use following code snippet to fetch access token.
key_file = p12_key_file_path
key = Google::APIClient::KeyUtils.load_from_pkcs12(key_file, 'notasecret')
client = Google::APIClient.new application_name: "abcd", application_version: "1.0.0"
SERVICE_ACCOUNT_ID (used in following code snippet) will be Email address generated under this "Service Account" section in google developer console.
client.authorization = Signet::OAuth2::Client.new(
:token_credential_uri => 'https://accounts.google.com/o/oauth2/token',
:audience => 'https://accounts.google.com/o/oauth2/token',
:scope => 'https://www.googleapis.com/auth/analytics',
:issuer => SERVICE_ACCOUNT_ID,
:access_type => 'offline',
:signing_key => key
)
client.authorization.fetch_access_token!
client
I hope it will help you.