从google-api-client 0.8.3迁移授权Google::CalendarV3

gem install google-api-client

require 'google/apis/calendar_v3'
require 'googleauth'
require 'googleauth/stores/file_token_store'

SCOPE = Google::Apis::CalendarV3::AUTH_CALENDAR_READONLY
CREDENTIALS_PATH = 'path/to/credentials.json'
TOKEN_PATH = 'path/to/token.yaml'

client_id = Google::Auth::ClientId.from_file(CREDENTIALS_PATH)
token_store = Google::Auth::Stores::FileTokenStore.new(file: TOKEN_PATH)
authorizer = Google::Auth::UserAuthorizer.new(client_id, SCOPE, token_store)
credentials = authorizer.get_credentials(user_id)

if credentials.nil?
  url = authorizer.get_authorization_url(base_url: OOB_URI)
  puts "请访问以下网址并输入授权码: #{url}"
  code = gets
  credentials = authorizer.get_and_store_credentials_from_code(user_id: user_id, code: code, base_url: OOB_URI)
end

service = Google::Apis::CalendarV3::CalendarService.new
service.client_options.application_name = APPLICATION_NAME
service.authorization = credentials