scheme should contain one or more characters

Author: tenderlove

actionpack/lib/action_dispatch/http/url.rb

@@ -5,7 +5,7 @@ module ActionDispatch
   module Http
     module URL
       IP_HOST_REGEXP  = /\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/
-      HOST_REGEXP     = /(^.*:\/\/)?([^:]+)(?::(\d+$))?/
+      HOST_REGEXP     = /(^[^:]+:\/\/)?([^:]+)(?::(\d+$))?/
       PROTOCOL_REGEXP = /^([^:]+)(:)?(\/\/)?$/
 
       mattr_accessor :tld_length