Google Contacts API

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

First, register[http://code.google.com/apis/accounts/docs/RegistrationForWebAppsAuto.html] your application’s domain. Then make users follow this URL:

  Contacts::Gmail.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::Gmail.new('example@gmail.com', params[:token])
  contacts = gmail.contacts
  #-> [ ['Fitzgerald', 'fubar@gmail.com', 'fubar@example.com'],
        ['William Paginate', 'will.paginate@gmail.com'], ...
        ]

Read more in Contacts::Gmail. I plan to support more APIs (Microsoft, etc); feel free to contribute.

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

Specdoc

Contacts::Gmail.authentication_url

• generates a URL for target with default parameters
• should handle boolean parameters
• skips parameters that have nil value

Contacts::Gmail

• should be set to query contacts from a specific account
• fetches contacts feed via HTTP GET
• handles gzipped response
• raises a FetchingError when something goes awry
• parses the resulting feed into name/email pairs
• makes modification time available after parsing

Contacts::Gmail 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