Cache requests to threads.json.

lib/$.coffee

@@ -63,8 +63,8 @@ $.extend $,
         return
       rm = -> delete reqs[url]
       req = $.ajax url,
-        onload: ->
-          cb.call @ for cb in @callbacks
+        onload: (e) ->
+          cb.call @, e for cb in @callbacks
           delete @callbacks
         onabort: rm
         onerror: rm

src/databoard.coffee

@@ -64,7 +64,7 @@ class DataBoard
 
     $.set @key, @data
   ajaxClean: (boardID) ->
-    $.ajax "//api.4chan.org/#{boardID}/threads.json", onload: (e) =>
+    $.cache "//api.4chan.org/#{boardID}/threads.json", (e) =>
       if e.target.status is 404
         # Deleted board.
         @delete boardID

src/features.coffee

@@ -1111,10 +1111,10 @@ ThreadHiding =
     # We need to clean hidden threads on the catalog ourselves,
     # otherwise if we don't visit the catalog regularly
     # it will pollute the localStorage and our data.
-    $.ajax "//api.4chan.org/#{g.BOARD}/threads.json", onload: (e) ->
+    $.cache "//api.4chan.org/#{g.BOARD}/threads.json", ->
       return unless @status is 200
       threads = {}
-      for page in JSON.parse e.target.response
+      for page in JSON.parse @response
         for thread in page.threads
           if thread.no of hiddenThreadsOnCatalog
             threads[thread.no] = hiddenThreadsOnCatalog[thread.no]