anchor.diff:      list_to_binary(Value);
   to_binary(Value) ->
       Value.
  +
  +config(Key) ->
  +    {ok, Val} = application:get_env(erltube, Key),
  +    Key.
  
positive.code:     case check_params(Resource, Params) of
          ok ->
              Url = get_url(Resource),
              case http_request(Method, Url, Headers, Params, Body) of
                  {200, Headers, Response} ->
                      {ok, Headers, parse_response(Response, json)};
  
negative.code: http_request(get, BaseUrl, Params) ->
      Url = create_url(BaseUrl, Params),
      {ok, {{_, Status, _}, Headers, Response}} =
          httpc:request(get, {Url, []}, [{timeout, config(timeout)}], []),
      {Status, Headers, Response};
  http_request(post, Url, Params) ->
      Args = create_url_params(Params),
      {ok, {{_, Status, _}, Headers, Response}} =
          httpc:request(post,
                        {Url, [], "application/x-www-form-urlencoded", Args},
                        [{timeout, config(timeout)}], []),
      {Status, Headers, Response}.
  
  http_request(Method, BaseUrl, Headers, Params, Body) ->
      Url = create_url(BaseUrl, Params),
      {ok, {{_, Status, _}, Headers, Response}} =
          httpc:request(Method, {Url, Headers}, [{timeout, config(timeout)}], Body),
      {Status, Headers, Response}.
  
  create_url(BaseUrl, Params) ->
  