add option to specify image size

README.md

@@ -37,6 +37,7 @@ You can configure several options, which you pass in to the `provider` method vi
 * `scope`: A comma-separated list of permissions you want to request from the user. See the Facebook docs for a full list of available permissions: http://developers.facebook.com/docs/reference/api/permissions. Default: `email`
 * `display`: The display context to show the authentication page. Options are: `page`, `popup`, `iframe`, `touch` and `wap`. Read the Facebook docs for more details: http://developers.facebook.com/docs/reference/dialogs#display. Default: `page`
 * `secure_image_url`: Set to `true` to use https for the avatar image url returned in the authentication hash. Default is `false`.
+* `image_size`: Set the size for the returned image url in the auth hash. Valid options are `square` (50x50), `small` (50 pixels wide, variable height), `normal` (100 pixels wide, variable height), or `large` (about 200 pixels wide, variable height). Default is `square` (50x50).
 
 For example, to request `email`, `user_birthday` and `read_stream` permissions and display the authentication page in a popup window:
 

lib/omniauth/strategies/facebook.rb

@@ -35,7 +35,7 @@ module OmniAuth
           'name' => raw_info['name'],
           'first_name' => raw_info['first_name'],
           'last_name' => raw_info['last_name'],
-          'image' => "#{options[:secure_image_url] ? 'https' : 'http'}://graph.facebook.com/#{uid}/picture?type=square",
+          'image' => "#{options[:secure_image_url] ? 'https' : 'http'}://graph.facebook.com/#{uid}/picture?type=#{options[:image_size] || 'square'}",
           'description' => raw_info['bio'],
           'urls' => {
             'Facebook' => raw_info['link'],

spec/omniauth/strategies/facebook_spec.rb

@@ -233,6 +233,13 @@ describe OmniAuth::Strategies::Facebook do
       subject.stub(:raw_info) { raw_info }
       subject.info['image'].should eq('https://graph.facebook.com/321/picture?type=square')
     end
+
+    it 'returns the image size specified in the `image_size` option' do
+      @options = { :image_size => 'normal' }
+      raw_info = { 'name' => 'Fred Smith', 'id' => '321' }
+      subject.stub(:raw_info) { raw_info }
+      subject.info['image'].should eq('http://graph.facebook.com/321/picture?type=normal')
+    end
   end
 
   describe '#raw_info' do