解析 ipip.net datx 格式的Erlang代码
https://www.ipip.net/product/ip.html
% 查询地级市精度的IP库
City = edatx_city:init("/path/to/mydata4vipday2.datx").
io:format("~ts,~ts,~ts,~ts~n", edatx_city:find("8.8.8.258", City)).
io:format("~ts,~ts,~ts,~ts~n", edatx_city:find("255.255.255.255", City)).
rebar3 compile