ClientLogin in the Google Data Protocol Client Libraries

http://code.google.com/intl/ru/apis/gdata/docs/auth/clientlogin.html#RecallAuthToken

This document describes how to use Google's Authentication for Installed Applications within each of the Google Data API client libraries.

Installed applications that need to access to a user's private data (protected by a Google or Google Apps (hosted) account), can use ClientLogin as programmatic means for authenticating users. An "installed application" is one that is installed on a device, such as a desktop computer or a cell phone, as opposed to a web application.

Building a web application?

It is discouraged for web applications to use ClientLogin as their authentication method. Instead, please see Using AuthSub with the Google Data API Client Libraries.

Contents

1. Audience
2. Using ClientLogin and the Google Data APIs without the client libraries
3. Working with ClientLogin and the Google Data APIs: client library examples
   1. Obtaining an auth token
   2. Recalling an auth token
   3. Handling CAPTCHA challenges