如何优雅地使用 RegExp 匹配 IP 地址~

RegExp

优雅

地址

匹配

17 replies • 2015-09-16 01:21:32 +08:00

learnshare

Sep 15, 2015

1

IPv4 `/^(((25[0-5])|(2[0-4]\d )|(1?\d{1,2}))\.){3}((25[0-5])|(2[0-4]\d )|(1?\d{1,2}))$/`
https://jex.im/regulex/#!embed=false&flags=&re=%5E (((25%5B0-5%5D )%7C (2%5B0-4%5D%5Cd )%7C (1%3F%5Cd%7B1%2C2%7D ))%5C.)%7B3%7D ((25%5B0-5%5D )%7C (2%5B0-4%5D%5Cd )%7C (1%3F%5Cd%7B1%2C2%7D ))%24

learnshare

Sep 15, 2015

2

手动复制第二行开始至结尾的 URL

wlee1991

OP

Sep 15, 2015

3

this one really ... sucks ...

(\\d{1}|[1-9]{1}\\d{1}|1{1}\\d{1}\\d{1}|2{1}[0-5]{1}[0-5]{1})\\.(\\d{1}|[1-9]{1}\\d{1}|1{1}\\d{1}\\d{1}|2{1}[0-5]{1}[0-5]{1})\\.(\\d{1}|[1-9]{1}\\d{1}|1{1}\\d{1}\\d{1}|2{1}[0-5]{1}[0-5]{1})\\.(\\d{1}|[1-9]{1}\\d{1}|1{1}\\d{1}\\d{1}|2{1}[0-5]{1}[0-5]{1})

wlee1991

OP

Sep 15, 2015

4

@learnshare
复制了，貌似不起作用？怎么那么多%？

learnshare

Sep 15, 2015

5

直接去 https://jex.im/regulex/ 填入下面这一行吧
/^(((25[0-5])|(2[0-4]\d )|(1?\d{1,2}))\.){3}((25[0-5])|(2[0-4]\d )|(1?\d{1,2}))$/

Ryans

Sep 15, 2015

6

([0-9]{1,3}[\.]){3}[0-9]{1,3}

wlee1991

OP

Sep 15, 2015

7

@Ryans 不能大于 255

18000rpm

Sep 15, 2015

8

写正则不分行不给注释叫优雅？

learnshare

Sep 15, 2015

9

@18000rpm 不是给了图形化的展示了么

18000rpm

Sep 15, 2015

10

@learnshare 只是觉得一行流的正则以后改起来太麻烦
https://gist.github.com/19000/52aa3be750d551b1f011

gamexg

Sep 15, 2015

11

很不优雅， IPv4 的还好， IPv6 的好长。

https://github.com/GameXG/TcpRoute/blob/master/dnslib/__init__.py#L34

wlee1991

OP

Sep 15, 2015

12

@18000rpm 感觉你这个还可以 25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?

18000rpm

Sep 15, 2015

13

@wlee1991 我只是在网上复制了一个来加了几个注释哈哈

msg7086

Sep 15, 2015

14

优雅地匹配 IP 最好别用正则而是用库。

ob

Sep 15, 2015 via Android

15

优雅被用坏了。。😃

virusdefender

Sep 15, 2015

16

django 的正则

ipv4_re = re.compile (r'^(25[0-5]|2[0-4]\d|[0-1]?\d?\d )(\.(25[0-5]|2[0-4]\d|[0-1]?\d?\d )){3}\Z')

wlee1991

OP

Sep 16, 2015

17

@virusdefender 你这个...貌似也不怎么优雅呀...