OAuth in the Google Data Protocol Client Libraries

http://code.google.com/intl/lv/apis/gdata/docs/auth/oauth.html

This document describes how to use the Google Data API client libraries to connect to Google's OAuth Authentication for Web Applications.

The OAuth interface allows a web-based application to access a Google service on behalf of a user. To maintain a high level of security, OAuth enables the application to get an access token without ever handling the user's account login information.

The Google Data API client libraries provide methods to help you use OAuth in your web application. Specifically, there are methods for constructing the acquiring a request token, authorizing the request token, and exchanging the authorized request token for an access token. The libraries also handle the necessary signing algorithms when making requests to a Google Data service.