OmniAuth VKontakte

This is the unofficial OmniAuth strategy for authenticating to VKontakte via OAuth. To use it, you'll need to sign up for an OAuth2 Application ID and Secret on the Vkontakte Developers Page.

SWUbanner

Installing

Add to your Gemfile:

gem 'omniauth-vkontakte'

Then bundle install

Usage

OmniAuth::Strategies::Vkontakte is simply a Rack middleware.

Here's a quick example, adding the middleware to a Rails app in config/initializers/omniauth.rb:

Rails.application.config.middleware.use OmniAuth::Builder do
  provider :vkontakte, ENV['VK_API_ID'], ENV['VK_API_SECRET']
end

See the example Sinatra app.

Configuring

You can configure several options, which you pass in to the provider method via a Hash:

scope: a comma-separated list of access permissions you want to request from the user. Read the Vkontakte docs for more details
display: the display context to show the authentication page. Valid options include page, popup and mobile.
lang: specifies the language. Optional options include ru, ua, be, en, es, fi, de, it.
image_size: defines the size of the user's image. Valid options include mini(50x50), bigger(100x100), bigger_x2(200x200), original(200x*) and original_x2(400x*). Default is mini.
info_fields: specify which fields should be added to AuthHash when getting the user's info. Value should be a comma-separated string as per http://vk.com/dev/fields.
redirect_url: URL where code will be passed. This URL shall be a part of the domain specified in application settings http://vk.com/dev/auth_sites.
https: 1 - allows you to receive https links to photos and other media. 0 - return an http links (the default).

Here's an example of a possible configuration:

use OmniAuth::Builder do
  provider :vkontakte, ENV['VKONTAKTE_KEY'], ENV['VKONTAKTE_SECRET'],
           scope: 'friends,audio,photos',
           display: 'popup',
           lang: 'en',
           https: 1,
           image_size: 'original'
end

Authentication Hash

Here's an example Auth Hash available in request.env['omniauth.auth']:

{"provider"=>"vkontakte",
 "uid"=>"1",
 "info"=>
  {"name"=>"Павел Дуров",
   "nickname"=>"",
   "first_name"=>"Павел",
   "last_name"=>"Дуров",
   "image"=>"http://cs7001.vk.me/c7003/v7003079/374b/53lwetwOxD8.jpg",
   "location"=>"Росiя, Санкт-Петербург",
   "urls"=>{"Vkontakte"=>"http://vk.com/durov"}},
 "credentials"=>
  {"token"=>
    "187041a618229fdaf16613e96e1caabc1e86e46bbfad228de41520e63fe45873684c365a14417289599f3",
   "expires_at"=>1381826003,
   "expires"=>true},
 "extra"=>
  {"raw_info"=>
    {"id"=>1,
     "first_name"=>"Павел",
     "last_name"=>"Дуров",
     "sex"=>2,
     "nickname"=>"",
     "screen_name"=>"durov",
     "bdate"=>"10.10.1984",
     "city"=>{"id"=>2, "title"=>"Санкт-Петербург"},
     "country"=>{"id"=>1, "title"=>"Росiя"},
     "photo"=>"http://cs7001.vk.me/c7003/v7003079/374b/53lwetwOxD8.jpg",
     "photo_big"=>"http://cs7001.vk.me/c7003/v7003736/3a08/mEqSflTauxA.jpg",
     "online"=>1,
     "online_app"=>"3140623",
     "online_mobile"=>1}}}

The precise information available may depend on the permissions which you request.

Supported Rubies

Tested with the following Ruby versions:

Ruby MRI (2.6.0+)
JRuby (9.3.0+)

Contributing to omniauth-vkontakte

Fork, fix, then send me a pull request.

License

This library is distributed under the MIT license. Please see the LICENSE file.