I use Garb(0.9.8) to fetch data from Google Analytics from our server directly using OAuth1. As Google only supports OAuth2 now so I switched to Signet gem and used a service account to get a access_token from the server directly as we need only server to server interaction.
key = Google::APIClient::KeyUtils.load_from_pkcs12(p12_key_path, 'notasecret')
client = Google::APIClient.new(application_name: 'Service account demo', application_version: '0.0.1')
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', 'https://www.googleapis.com/auth/analytics.readonly'],
:issuer => <service account email>,
:signing_key => key
)
access_token = client.authorization.fetch_access_token!["access_token"]
The token is valid and i double checked it from the Google API playground. The service account has been added as a user with all permissions to my Google Analytics account. If feasible I wanted to use Garb instead of completely switching to google-api-client gem so as to avoid re-writing a lot of exisiting code. Then to make Garb use the access_token obtained and fetch all profiles I did the following
garbsession = Garb::Session.new
garbsession.access_token = access_token
Garb::Management::Profile.all(garbsession)
But I am getting an error:
NoMethodError: undefined method `get' for #<String:0xd877aa0>
from /home/alok/.rvm/gems/ruby-1.9.3-p385/gems/garb-0.9.8/lib/garb/request/data.rb:94:in `oauth_user_request'
from /home/alok/.rvm/gems/ruby-1.9.3-p385/gems/garb-0.9.8/lib/garb/request/data.rb:41:in `send_request'
from /home/alok/.rvm/gems/ruby-1.9.3-p385/gems/garb-0.9.8/lib/garb/management/feed.rb:21:in `response'
from /home/alok/.rvm/gems/ruby-1.9.3-p385/gems/garb-0.9.8/lib/garb/management/feed.rb:13:in `parsed_response'
from /home/alok/.rvm/gems/ruby-1.9.3-p385/gems/garb-0.9.8/lib/garb/management/feed.rb:17:in `entries'
from /home/alok/.rvm/gems/ruby-1.9.3-p385/gems/garb-0.9.8/lib/garb/management/profile.rb:14:in `all'
from (irb):47
from /home/alok/.rvm/gems/ruby-1.9.3-p385/gems/railties-3.2.19/lib/rails/commands/console.rb:47:in `start'
from /home/alok/.rvm/gems/ruby-1.9.3-p385/gems/railties-3.2.19/lib/rails/commands/console.rb:8:in `start'
from /home/alok/.rvm/gems/ruby-1.9.3-p385/gems/railties-3.2.19/lib/rails/commands.rb:41:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
Am I doing something wrong? Can I use an Access token obtained by some other method in Garb and then access the Google Analytics API ?
The mistake I made is Garb::Session.access_token should be an instance of OAuth2 client and not the access token itself. I am posting the working code in my answer so that it might help other later !. Came across the code when browsing the Legato gem for a solution to the problem. Github issue link from where I found the solution- https://github.com/tpitale/legato/issues/90
p12_key_path = File.join(Rails.root, "config", <p12_key_path>)
key = Google::APIClient::KeyUtils.load_from_pkcs12(p12_key_path, 'notasecret')
auth_client = 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.readonly',
issuer: <ga_service_account email>,
signing_key: key
)
access_token = auth_client.fetch_access_token!
raise "Google OAuth Access Token is blank" if access_token["access_token"].blank?
oauth_client = OAuth2::Client.new("", "", {
authorize_url: 'https://accounts.google.com/o/oauth2/auth',
token_url: 'https://accounts.google.com/o/oauth2/token'
})
token = OAuth2::AccessToken.new(oauth_client, access_token["access_token"], expires_in: 1.hour)
Garb::Session.access_token = token
profile = Garb::Management::Profile.all