move from url2png to webyshots (free)

Gemfile

@@ -22,7 +22,6 @@ gem 'aws-ses',                       '0.4.4', :require => 'aws/ses'
 gem 'exception_notification_rails3', '1.2.0', :require => 'exception_notifier'
 gem 'mongoid_rails_migrations',      '0.0.14'
 gem 'dalli',                         '1.1.3'
-gem 'url2png',                       '0.0.6'
 gem 'redcarpet',                     '2.0.0'
 gem 'heroku',                        '2.20.1'
 

app/helpers/account/themes_helper.rb

@@ -2,12 +2,16 @@ module Account::ThemesHelper
 
   def theme_image theme, size="210x150"
     if Rails.env.production?
-      Url2png::Config.public_key = 'P4ED717C89A831'
-      Url2png::Config.shared_secret = 'SCFD8EF851C0B1'
-      url = "http://support.ribbot.com/?theme_preview=#{theme.id}"
-      site_image_tag(url, :size => size).html_safe
+      url = "support.ribbot.com/?theme_preview=#{theme.id}"
+      site_image_tag(webyshots_url(url, size), :size => size).html_safe
     else
       image_tag "http://placehold.it/#{size}"
     end
   end
+
+  def webyshots_url(url, size)
+    safe_url = CGI.escape(url)
+    token = Digest::MD5.hexdigest("#{ENV['WEBYSHOTS_SECRET']}+#{safe_url}")
+    "http://api.webyshots.com/v1/shot/#{ENV['WEBYSHOT_KEY']}/#{token}/#{safe_url}/png/#{size}"
+  end
 end

app/views/forums/index.html.erb

@@ -2,6 +2,7 @@
   <%= link_to '+ Create A Forum', new_forum_path, :class => "btn btn-primary" %>
 </div>
 <h1>My Forums</h1>
+
 <br/>
 
 <table class="table">