anchor.diff:      filename:join(Prefix, binary_to_list(Root)).
   
   decode_request_header_filter(undefined) ->
  -    ?DEF_REQ_HEADER_FILTER;
  +    ?DEF_REQ_HEADERS_FILTER;
   decode_request_header_filter({[{Op, Names}]}) ->
       {binary_to_existing_atom(Op, latin1), [binary_to_list(Name) || Name <- Names]}.
   
  
positive.code: -define(TIMEOUT, 60000).
  -define(PART_SIZE, 100000).
  -define(WINDOW_SIZE, 5).
  -define(DEF_REQ_HEADER_FILTER, {drop, ["Content-Length",
                                         "Transfer-Encoding"]}).
  -type service_name()   :: atom().
  -type rest_api_prefix():: string().
  -type proxy_strategy() :: local.
  
negative.code: 
  handle_resp({ok, {{StatusCode, _ReasonPhrase}, RcvdHeaders, Pid}}, Req)
    when is_pid(Pid) ->
      SendHeaders = filter_headers(RcvdHeaders, ?DEF_RESP_HEADERS_FILTER),
      Resp = start_response(Req, StatusCode, SendHeaders),
      stream_body(Pid, Resp);
  handle_resp({ok, {{StatusCode, _ReasonPhrase}, RcvdHeaders, undefined = _Body}},
              Req) ->
      SendHeaders = filter_headers(RcvdHeaders, ?DEF_RESP_HEADERS_FILTER),
      menelaus_util:respond(Req, {StatusCode, SendHeaders, <<>>});
  handle_resp({error, _Reason}=Error, Req) ->
      ?log_error("http client error ~p~n", [Error]),
      menelaus_util:respond(Req, {500, [], <<"Unexpected server error">> }).
  
  start_response(Req, StatusCode, Headers) ->
      menelaus_util:respond(Req, {StatusCode, Headers, chunked}).
  