Regular Expressions 101

Community Patterns

22

Get path from any text

Created·2023-01-31 14:38
Updated·2023-07-23 20:17
Flavor·PCRE2 (PHP)
Recommended·
Get path (windows style) from any type of text (error message, e-mail corps ...), quoted or not. THIS IS THE SINGLE LINE VERSION ! If you want understand how it work or edit it, go https://regex101.com/r/7o2fyy Relative path are not supported The goal is to catch what "Look like" a path. See the limitations UNC path and prefix path like //./], [//?/] or [//./UNC/] are allowed some url path like [file:///C:/] or [file://] are allowed Catch path quoted with ["] and [']. But these quotes are include with the catch Quoted path is not concerned by limitations Limitations : (only unquoted path) [dot] and [space] is allowed, but not in a row [dot+space] or [space+dot at end of file name isn't catched INSIDE A NAME FILE (or last directory if it is a path to a directory) : [comma] is not supported (it stop the catch) after a first [dot], any [space] stop the catch after a [space], catch is stoped if next character is not a [letter], [digit] or [-] so, double [space] stop the catch Compatibility compatible PCRE, PCRE2 AutoHotkey : don't forget to escape "%" in "`%" /!\ Powershell and .Net /!\\ : this regex need some modification to be interpreted by powershell. You have to replace each (?&CapturGroupName) by \k. Use this powershell code to do this replacement : ` $powershellRegex = @' [Put here the regex to replace (?&CapturGroupName) with \k] '@ -replace '\(\?&(\w+)\)', '\k' ` This example code must return : [Put here the regex to replace \k with \k]
Submitted by nitrateag

Community Library Entry

1

Regular Expression
Created·2020-01-20 10:24
Flavor·Golang

`
^(10(\.(([0-9]?[0-9])|(1[0-9]?[0-9])|(2[0-4]?[0-9])|(25[0-5]))){3}/([8-9]|(1[0-9])|(2[0-9])|(3[0-1])))|(172\.((1[6-9])|(2[0-9])(3[0-1]))(\.(([0-9]?[0-9])|(1[0-9]?[0-9])|(2[0-4]?[0-9])|(25[0-5]))){2}/((1[2-9])|(2[0-9])|(3[0-1])))|(192\.168(\.(([0-9]?[0-9])|(1[0-9]?[0-9])|(2[0-4]?[0-9])|(25[0-5]))){2}/((1[6-9])|(2[0-9])|(3[0-1])))|(127(\.(([0-9]?[0-9])|(1[0-9]?[0-9])|(2[0-4]?[0-9])|(25[0-5]))){3}/([8-9]|(1[0-9])|(2[0-9])|(3[0-1])))$
`
gm
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Description

Validates that you provide a CIDR in one of the following valid ranges.

    127.  0.0.0 – 127.255.255.255     127.0.0.0/8
     10.  0.0.0 –  10.255.255.255      10.0.0.0/8
    172. 16.0.0 – 172. 31.255.255    172.16.0.0/12
    192.168.0.0 – 192.168.255.255   192.168.0.0/16

Subnets can be smaller (e.g. 192.168.0.0/17 is valid) but not larger (e.g. 192.168.0.0/15 is invalid). Single hosts (i.e. /32s) are invalid. Host bits are generally ignored (i.e. 192.168.1.2/16 is considered valid)

Submitted by David Stockton