DataUnpacker with fallback

app/assets/javascripts/player.js

@@ -1,10 +1,12 @@
 //= require vendor/rAF
 //= require vendor/base64.min
+//= require vendor/bzip2
 //= require extensions
 //= require namespace
 //= require player/views/renderers/base
 //= require_tree ./player/views/renderers
 //= require player/views/hud_view
+//= require player/data_unpacker
 //= require player/views/player_view
 //= require player/workers/worker_object_proxy
 //= require player/workers/worker_proxy

app/assets/javascripts/player/data_unpacker.js.coffee

@@ -0,0 +1,11 @@
+class AsciiIo.DataUnpacker
+  unpack: (base64BzippedData, callback) ->
+    bzippedData = atob base64BzippedData
+
+    if window.Worker
+      worker = new Worker(window.unpackWorkerPath)
+      worker.onmessage = (event) => callback event.data
+      worker.postMessage bzippedData
+    else
+      data = ArchUtils.bz2.decode bzippedData
+      callback data

app/assets/javascripts/player/views/player_view.js.coffee

@@ -27,14 +27,13 @@ class AsciiIo.PlayerView extends Backbone.View
     @model.fetch success: => @onModelFetched()
 
   onModelFetched: ->
-    data = atob @model.get('escaped_stdout_data')
-    worker = new Worker(window.unpackWorkerPath)
+    data = @model.get('escaped_stdout_data')
+    unpacker = new AsciiIo.DataUnpacker
+    unpacker.unpack data, @onDataUnpacked
 
-    worker.onmessage = (event) =>
-      @model.set stdout_data: event.data
-      @onModelReady()
-
-    worker.postMessage data
+  onDataUnpacked: (data) =>
+    @model.set stdout_data: data
+    @onModelReady()
 
   onModelReady: ->
     @hideLoadingIndicator()