recv_loop(Conn, Res, Timeout) ->
    Body = maps:get(body, Res, <<>>),
    case byte_size(Body) < content_length(Res) of
    true ->
        case recv(Conn, content_length(Res) - byte_size(Body), Timeout) of
        {ok, Data} ->
            recv_loop(Conn, Res#{body => <<Body/binary, Data/binary>>}, Timeout);
        {error, closed} ->
            {ok, Res};
        Other ->
            Other
        end;
    false ->
        {ok, Res}
    end.