https://github.com/plotdb/curegex

commonly used regular expressions.
https://github.com/plotdb/curegex

Last synced: about 2 months ago
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commonly used regular expressions.

• Host: GitHub
• URL: https://github.com/plotdb/curegex
• Owner: plotdb
• Created: 2020-12-13T16:17:47.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2022-01-22T07:58:32.000Z (almost 3 years ago)
• Last Synced: 2024-10-15T11:04:09.690Z (2 months ago)
• Language: Pug
• Size: 1.54 MB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md

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README

        
# Commonly Used REGular EXpressions

## Note

Some regular expressions here are vulnerable to `ReDOS` attack. Be sure to use them with following conditions:

 - server side: Run these expression with libraries such as `google/re2`, `node-re2`.

 - client side: avoid them, or at least impose necessary limitations on input.

## Installation

    npm install --save curegex

## Usage

include `curegex.js` or `curegex.tw.js`, then use:

    curegex.get("email").exec(mystring);

    curegex.get("email", re2).exec(mystring); /* use `re2` regex engine instead of native RegExp */

set default regular expression engine:

    curegex.engine(re2);

## Usage with NodeJS

include `curegex` and use it by scope:

    var curegex = require("curegex");

    var curegextw = require("curegex").tw;

 

## Resources

 - evil regex and rules of thumb: https://stackoverflow.com/questions/12841970/how-can-i-recognize-an-evil-regex

   - per James Davis mentioned, avoid following:

     - nesting quantifiers ( `(a+)+` )

     - quantified overlapping disjunctions ( `(a|a)+` )

     - quantified overlapping adjacencies ( `\d+\d+` )

   - visualize regular expression to spot above cases: https://regexper.com/

 - https://en.wikipedia.org/wiki/ReDoS

## License

MIT