Serve original asciicast files from /a/:id.json

app/controllers/asciicasts_controller.rb

@@ -23,6 +23,14 @@ class AsciicastsController < ApplicationController
         }
       end
 
+      format.json do
+        if url = asciicast.file_url
+          redirect_to url
+        else
+          render nothing: true, status: 404
+        end
+      end
+
       format.png do
         asciicast_image_generator.generate(asciicast) if asciicast.image_stale?
         redirect_to asciicast.image_url

app/models/asciicast.rb

@@ -120,7 +120,7 @@ class Asciicast < ActiveRecord::Base
       Stdout::MultiFile.new(stdout_data.decompressed_path,
                             stdout_timing.decompressed_path)
     else
-      Stdout::SingleFile.new(file.url)
+      Stdout::SingleFile.new(file.absolute_url)
     end
   end
 

app/uploaders/asciicast_uploader.rb

@@ -1,10 +1,10 @@
 class AsciicastUploader < BaseUploader
 
-  def url
+  def absolute_url
     if CFG.carrierwave_storage == 'file'
       path
     else
-      super
+      url
     end
   end