• https://github.com/fraudpointer/two-legged-oauth-ruby

The purpose of this gem is to make the oauth gem play nice with Google's custom 2 legged OAuth (2LO), used specifically for Google Apps APIs accessed from Google Apps Marketplace applications.

For more info on the 2 legged OAuth see these :

• Google Apps OAuth
• 2 Legged OAuth in PHP
• Google Apps Marketplace Authentication Best Practices
• Google Data APIs 2 Legged OAuth

This gem has been tested with the following libraries so far and seems to be working ok :

• GoogleContactsApi
• GoogleSpreadsheet (with some custom fixes that hopefully will get integrated to the official gem)
• Google Apps Marketplace Ruby tutorial

Add on your Gemfile :

gem 'two-legged-oauth'

On the console :

gem install two-legged-oauth

On your code :

require 'two-legged-oauth'

# Create a normal consumer instance
oauth_consumer = OAuth::Consumer.new("key", "secret")

# Initialize a TwoLeggedAccessToken specifying the xoauth_requestor_id
access_token = OAuth::TwoLeggedAccessToken.new(oauth_consumer, "user@domain.com")

# Pass that access token to Google Data libraries (or your custom scripts)
gs = GoogleSpreadsheet.login_with_oauth(access_token)

This thing works by rewriting the requested URL on-the-fly and appends the xoauth_requestor_id param appropriately. This may be dangerous at times so be aware that some well hidden bugs may come up...

Report any issues on the github's issue tracker or send a pull request if you have nailed the bug.

Tested contributions are always welcome! Here's what you should do:

1. Clone the repo
2. Run the tests
3. Write some test-driven code
4. Create a pull request

two-legged-oauth is copyright 2011 by Fraudpointer, released under the MIT License (see LICENSE for details).