如何授权google-api-ruby-client？

Question

我正在努力让google-api-ruby-client gem按照这里的基本用法示例运行：

require 'google/apis/drive_v2'

Drive = Google::Apis::DriveV2 # Alias the module
drive = Drive::DriveService.new
drive.authorization = ... # See Googleauth or Signet libraries

# Search for files in Drive (first page only)
files = drive.list_files(q: "title contains 'finances'")
files.items.each do |file|
  puts file.title
end

我陷入困境的地方是drive.authorization。我已经通过gem omniauth-google-oauth2为用户提供了授权令牌。如何在google-api-ruby-client中使用该令牌？

Answer 1

我也被卡住了。IMO Google应该在他们的文档中更详细，特别是因为我们所要做的只是添加一个请求头……

无论如何，这里有一个例子。

#
# Note I don't think we always have to define a class with such a conflict-prone name. 
# An anonymous class defined before every single API call should be also fine.
#
module Google
  class AccessToken
    attr_reader :token
    def initialize(token)
      @token = token
    end

    def apply!(headers)
      headers['Authorization'] = "Bearer #{@token}"
    end
  end
end

Drive = Google::Apis::DriveV2
drive = Drive::DriveService.new
drive.authorization = Google::AccessToken.new your_token

参考：https://github.com/google/google-api-ruby-client/issues/296

Answer 2

与其他答案类似，我遵循了这种方法，其中使用了存储身份验证和刷新令牌的模型，从该逻辑中抽象出API交互。

# Manages access tokens for users when using Google APIs
#
# Usage:
# require 'google/apis/gmail_v1'
# Gmail = Google::Apis::GmailV1 # Alias the module
# service = Gmail::GmailService.new
# service.authorization = GoogleOauth2Authorization.new user
# service.list_user_messages(user.email)
#
# See also:
# https://github.com/google/google-api-ruby-client/issues/296
class GoogleOauth2Authorization
  attr_reader :user

  def initialize(user)
    @user = user
  end

  def apply!(headers)
    headers['Authorization'] = "Bearer #{token}"
  end

  def token
    refresh! if user.provider_token_expires_at.past?
    user.provider_access_token
  end

  private

  def refresh!
    new_token = oauth_access_token(
      user.provider_access_token,
      user.provider_refresh_token
    ).refresh!
    if new_token.present?
      user.update(
        provider_access_token: new_token.token,
        provider_token_expires_at: Time.zone.at(new_token.expires_at),
        provider_refresh_token: new_token.refresh_token
      )
    end
    user
  end

  def oauth_access_token(access_token, refresh_token)
    OAuth2::AccessToken.new(
      oauth_strategy.client,
      access_token,
      refresh_token: refresh_token
    )
  end

  def oauth_strategy
    OmniAuth::Strategies::GoogleOauth2.new(
      nil,
      Rails.application.credentials.oauth[:google_id],
      Rails.application.credentials.oauth[:google_secret]
    )
  end
end