lib/webpacker/helper.rb in webpacker-legacy-0.1.1 vs lib/webpacker/helper.rb in webpacker-legacy-0.1.2

@@ -53,9 +53,43 @@
     else
       nil
     end
   end
 
+  def compute_asset_host(source = "", options = {})
+    request = self.request if respond_to?(:request)
+    host = options[:host]
+    host ||= config.asset_host if defined? config.asset_host
+
+    if host
+      if host.respond_to?(:call)
+        arity = host.respond_to?(:arity) ? host.arity : host.method(:call).arity
+        args = [source]
+        args << request if request && (arity > 1 || arity < 0)
+        host = host.call(*args)
+      elsif host.include?("%d")
+        host = host % (Zlib.crc32(source) % 4)
+      end
+    end
+
+    host ||= request.base_url if request && options[:protocol] == :request
+    return unless host
+
+    if URI_REGEXP.match?(host)
+      host
+    else
+      protocol = options[:protocol] || config.default_asset_host_protocol || (request ? :request : :relative)
+      case protocol
+      when :relative
+        "//#{host}"
+      when :request
+        "#{request.protocol}#{host}"
+      else
+        "#{protocol}://#{host}"
+      end
+    end
+  end
+
   ASSET_EXTENSIONS = {
         javascript: ".js",
         stylesheet: ".css"
   }
 end