lib/sinatra/assetpack/css.rb in sinatra-assetpack-0.2.1 vs lib/sinatra/assetpack/css.rb in sinatra-assetpack-0.2.2

@@ -2,10 +2,10 @@
 
 module Sinatra
   module AssetPack
     module Css
       def self.preproc(str, assets)
-        str.gsub(/url\((["']?)(.*?)(["']?)\)/) { |url|
+        str.gsub(/url\((["']?)(?!data:)(.*?)(["']?)\)/) { |url|
           css_url = URI.parse($2)
           file = css_url.path
           options = css_url.query
           local = assets.local_file_for file