anchor.diff:      #http_options{method = Method, ib_opts = Opts} = Options,
       {ok, Vsn} = application:get_key(hello, vsn),
       Headers = [{"Content-Type", content_type(Signarute)},
  -               {"Accept", Signarute},
  +               {"Accept", content_type(Signarute)},
                  {"User-Agent", "hello/" ++ Vsn}],
       case ibrowse:send_req(URL, Headers, Method, Request, Opts) of
           {ok, _HttpCode, _, []} -> %% empty responses are ignored
  
positive.code:     case Signarute of
          Json -> "application/json";
          MsgPack -> "application/x-msgpack";
          _ -> [] 
      end.
  
  %% http client helpers
  
negative.code:     {noreply, State}.
  
  build_url(Scheme, Host, Path, Port) ->
      ex_uri:encode(#ex_uri{scheme = Scheme,
                            authority = #ex_uri_authority{host = clean_host(Host), port = Port},
                            path = Path}).
  
  clean_host(Host) ->
  