http://ip.taobao.com/service/getIpInfo.php
这是淘宝提供的接口，只需要在后面使用?ip=就可以直接操作
例如：http://ip.taobao.com/service/getIpInfo.php?ip=192.168.1.30
查询结果如下:
{"code":0,"data":{"ip":"192.168.1.30","country":"XX","area":"","region":"XX","city":"内网IP","county":"内网IP","isp":"内网IP","country_id":"xx","area_id":"","region_id":"xx","city_id":"local","county_id":"local","isp_id":"local"}}
这个接口在项目中应用的话，如果访问的是本地的项目，并且使用的是localhost，那么获取到的内容就会为空。