anchor.diff:      end,
       ContentData = case ContentLength of
                         0 ->
  -                          {ok, <<>>};
  +                          <<>>;
                         _ ->
                             fcgi_receive_binary(WorkerState, ContentLength,
                                                 ?FCGI_READ_TIMEOUT_MSECS)
  
positive.code: -define(FCGI_VERSION_1, 1).
  
  -define(FCGI_TYPE_BEGIN_REQUEST, 1).
  -define(FCGI_TYPE_ABORT_REQUEST, 2).
  -define(FCGI_TYPE_END_REQUEST, 3).
  -define(FCGI_TYPE_PARAMS, 4).
  -define(FCGI_TYPE_STDIN, 5).
  -define(FCGI_TYPE_STDOUT, 6).
  -define(FCGI_TYPE_STDERR, 7).
  -define(FCGI_TYPE_DATA, 8).
  -define(FCGI_TYPE_GET_VALUES, 9).
  -define(FCGI_TYPE_GET_VALUES_RESULT, 10).
  -define(FCGI_TYPE_UNKNOWN_TYPE, 11).
  
  fcgi_type_name(?FCGI_TYPE_BEGIN_REQUEST) -> "begin-request";
  fcgi_type_name(?FCGI_TYPE_ABORT_REQUEST) -> "abort-request";
  fcgi_type_name(?FCGI_TYPE_END_REQUEST) -> "end-request";
  fcgi_type_name(?FCGI_TYPE_PARAMS) -> "params";
  fcgi_type_name(?FCGI_TYPE_STDIN) -> "stdin";
  fcgi_type_name(?FCGI_TYPE_STDOUT) -> "stdout";
  fcgi_type_name(?FCGI_TYPE_STDERR) -> "stderr";
  fcgi_type_name(?FCGI_TYPE_DATA) -> "data";
  fcgi_type_name(?FCGI_TYPE_GET_VALUES) -> "get_values";
  fcgi_type_name(?FCGI_TYPE_GET_VALUES_RESULT) -> "get_values_result";
  fcgi_type_name(?FCGI_TYPE_UNKNOWN_TYPE) -> "unknown-type";
  fcgi_type_name(_) -> "?".
  
  %%% The FCGI implementation does not support handling concurrent requests
  %%% over a connection; it creates a separate connection for each
  
negative.code:             fcgi_worker_fail(
                WorkerState,
                {"application did not understand record type we sent",
                 UnknownType})
      end.
  
  
  fcgi_receive_record(WorkerState) ->
      Header = fcgi_receive_binary(WorkerState, 8, ?FCGI_READ_TIMEOUT_MSECS),
      <<Version:8, Type:8, RequestId:16, ContentLength:16,
        PaddingLength:8, Reserved:8>> = Header,
      fcgi_worker_fail_if(Version /= 1, WorkerState,
  