测试所有Cloud Flare IP地址

抓取并遍历所有Cloud Flare IPv4公开地址

curl -X GET "https://api.cloudflare.com/client/v4/ips"

大约有178万个IPv4地址：

173.245.48.0/20,

103.21.244.0/22,

103.22.200.0/22,

103.31.4.0/22,

141.101.64.0/18,

108.162.192.0/18,

190.93.240.0/20,

188.114.96.0/20,

197.234.240.0/22,

198.41.128.0/17,

162.158.0.0/15,

104.16.0.0/12,

172.64.0.0/13,

131.0.72.0/22

遍历一次大概需要5天时间