Fetch users’ contact lists from your web application without asking them to provide their passwords.

First, register your application’s domain. Then make users follow this URL:

Contacts::Google.authentication_url('http://mysite.com/invite')

They will authenticate on Google and it will send them back to the URL provided. Google will add a token GET parameter to the query part of the URL. Use that token in the next step:

gmail = Contacts::Google.new(params[:token])
gmail.contacts
# => [#<Contact 1>, #<Contact 2>, ...]

The resulting Contacts::Contact objects have ‘name` and `email` properties.

Read more in Contacts::Google. I plan to support more APIs (Microsoft Live, for starters); feel free to contribute.

Author: Mislav Marohnić (mislav.marohnic@gmail.com)

Contacts::Google.authentication_url

• generates a URL for target with default parameters

• should handle boolean parameters

• skips parameters that have nil value

• should be able to exchange one-time for session token

Contacts::Google

• fetches contacts feed via HTTP GET

• handles a normal response body

• handles gzipped response

• raises a FetchingError when something goes awry

• parses the resulting feed into name/email pairs

• parses a complex feed into name/email pairs

• makes modification time available after parsing

Contacts::Google GET query parameter handling

• abstracts ugly parameters behind nicer ones

• should have implicit :descending with :order

• should have default :limit of 200

• should skip nil values in parameters