Google Analytics API by ruby

client_secrets.....json

{
  "installed": {
    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
    "client_secret": "xxxxxxxxxxxxx-xxxxxxxxxxxxxxx",
    "token_uri": "https://accounts.google.com/o/oauth2/token",
    "client_email": "",
    "redirect_uris": [
      "urn:ietf:wg:oauth:2.0:oob",
      "oob"
    ],
    "client_x509_cert_url": "",
    "client_id": "xxxxxxxxxxxxxx-xxxxxxxxxxxxxxxxxxxxxxxxxx.apps.googleusercontent.com",
    "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs"
  }
}

Gemfile

source "https://rubygems.org"

gem "google-api-client", git: '[email protected]:google/google-api-ruby-client.git'

main.rb

require 'google/api_client'
require 'google/api_client/client_secrets'
require 'google/api_client/auth/installed_app'
require 'google/api_client/auth/file_storage'

# profile id is not tracking id.
# 'aXXXXXXXwYYYYYYYYpZZZZZZZZ' => 'ZZZZZZZZ' is profile id.
GA_PROFILE_ID = 'xxxxxxxx'
CREDENTIAL_STORE_FILE = "#{$0}-oauth2.json"

client = Google::APIClient.new(
  :application_name => 'Example Ruby application',
  :application_version => '1.0.0'
)

file_storage = Google::APIClient::FileStorage.new(CREDENTIAL_STORE_FILE)

if file_storage.authorization.nil?
  # client_secret.json を読み込む
  client_secrets = Google::APIClient::ClientSecrets.load

  flow = Google::APIClient::InstalledAppFlow.new(
    client_id: client_secrets.client_id,
    client_secret: client_secrets.client_secret,
    scope: [
      'https://www.googleapis.com/auth/analytics.readonly'
    ]
  )

  client.authorization = flow.authorize(file_storage)
else
  client.authorization = file_storage.authorization
end

analytics = client.discovered_api('analytics', 'v3')

p count = client.execute(api_method: analytics.data.ga.get, parameters: {
  'ids' => "ga:#{GA_PROFILE_ID}",
  'start-date' => '2014-10-01',
  'end-date' => '2014-10-31',
  'dimensions' => "ga:pageTitle,ga:pagePath",
  'metrics' => "ga:visitors,ga:visits,ga:pageviews",
  'sort' => "-ga:pageviews"
})

count.data.rows.each do |row|
  puts "path:#{row[1]}, count:#{row[2]}"
end

Where do you put the credentials file?