anchor.diff:  	{ok, Bin} ->
   	    Ext  = filename:extension(File),
   	    Bin1 = if_erlang_add_pre(Ext, Bin),
  -	    {ok, Req1} = send_page(classify_extension(Ext), Bin1, Req),
  +	    Req1 = send_page(classify_extension(Ext), Bin1, Req),
   	    {ok, Req1, Env}
       end.
   
  
positive.code: 
  
  path(Req) ->
      {Path,_} = cowboy_req:path(Req),
      filename:split(binary_to_list(Path)).
  
  reply_html(Obj, Req, Env) ->
      {ok, Req1} = send_page(html, Obj, Req),
      {ok, Req1, Env}.
  
  %%----------------------------------------------------------------------
  
negative.code: 
  %%----------------------------------------------------------------------
  %% websocket stuff
  
  websocket_handle({text, Msg}, Req, Pid) ->
      %% This is a Json message from the browser
  