216 lines
6.6 KiB
Markdown
216 lines
6.6 KiB
Markdown
# psl (Public Suffix List)
|
|
|
|
[](https://nodei.co/npm/psl/)
|
|
|
|
[](https://greenkeeper.io/)
|
|
[](https://travis-ci.org/lupomontero/psl)
|
|
[](https://david-dm.org/lupomontero/psl#info=devDependencies)
|
|
|
|
`psl` is a `JavaScript` domain name parser based on the
|
|
[Public Suffix List](https://publicsuffix.org/).
|
|
|
|
This implementation is tested against the
|
|
[test data hosted by Mozilla](http://mxr.mozilla.org/mozilla-central/source/netwerk/test/unit/data/test_psl.txt?raw=1)
|
|
and kindly provided by [Comodo](https://www.comodo.com/).
|
|
|
|
Cross browser testing provided by
|
|
[<img alt="BrowserStack" width="160" src="./browserstack-logo.svg" />](https://www.browserstack.com/)
|
|
|
|
## What is the Public Suffix List?
|
|
|
|
The Public Suffix List is a cross-vendor initiative to provide an accurate list
|
|
of domain name suffixes.
|
|
|
|
The Public Suffix List is an initiative of the Mozilla Project, but is
|
|
maintained as a community resource. It is available for use in any software,
|
|
but was originally created to meet the needs of browser manufacturers.
|
|
|
|
A "public suffix" is one under which Internet users can directly register names.
|
|
Some examples of public suffixes are ".com", ".co.uk" and "pvt.k12.wy.us". The
|
|
Public Suffix List is a list of all known public suffixes.
|
|
|
|
Source: http://publicsuffix.org
|
|
|
|
|
|
## Installation
|
|
|
|
### Node.js
|
|
|
|
```sh
|
|
npm install --save psl
|
|
```
|
|
|
|
### Browser
|
|
|
|
Download [psl.min.js](https://raw.githubusercontent.com/lupomontero/psl/master/dist/psl.min.js)
|
|
and include it in a script tag.
|
|
|
|
```html
|
|
<script src="psl.min.js"></script>
|
|
```
|
|
|
|
This script is browserified and wrapped in a [umd](https://github.com/umdjs/umd)
|
|
wrapper so you should be able to use it standalone or together with a module
|
|
loader.
|
|
|
|
## API
|
|
|
|
### `psl.parse(domain)`
|
|
|
|
Parse domain based on Public Suffix List. Returns an `Object` with the following
|
|
properties:
|
|
|
|
* `tld`: Top level domain (this is the _public suffix_).
|
|
* `sld`: Second level domain (the first private part of the domain name).
|
|
* `domain`: The domain name is the `sld` + `tld`.
|
|
* `subdomain`: Optional parts left of the domain.
|
|
|
|
#### Example:
|
|
|
|
```js
|
|
var psl = require('psl');
|
|
|
|
// Parse domain without subdomain
|
|
var parsed = psl.parse('google.com');
|
|
console.log(parsed.tld); // 'com'
|
|
console.log(parsed.sld); // 'google'
|
|
console.log(parsed.domain); // 'google.com'
|
|
console.log(parsed.subdomain); // null
|
|
|
|
// Parse domain with subdomain
|
|
var parsed = psl.parse('www.google.com');
|
|
console.log(parsed.tld); // 'com'
|
|
console.log(parsed.sld); // 'google'
|
|
console.log(parsed.domain); // 'google.com'
|
|
console.log(parsed.subdomain); // 'www'
|
|
|
|
// Parse domain with nested subdomains
|
|
var parsed = psl.parse('a.b.c.d.foo.com');
|
|
console.log(parsed.tld); // 'com'
|
|
console.log(parsed.sld); // 'foo'
|
|
console.log(parsed.domain); // 'foo.com'
|
|
console.log(parsed.subdomain); // 'a.b.c.d'
|
|
```
|
|
|
|
### `psl.get(domain)`
|
|
|
|
Get domain name, `sld` + `tld`. Returns `null` if not valid.
|
|
|
|
#### Example:
|
|
|
|
```js
|
|
var psl = require('psl');
|
|
|
|
// null input.
|
|
psl.get(null); // null
|
|
|
|
// Mixed case.
|
|
psl.get('COM'); // null
|
|
psl.get('example.COM'); // 'example.com'
|
|
psl.get('WwW.example.COM'); // 'example.com'
|
|
|
|
// Unlisted TLD.
|
|
psl.get('example'); // null
|
|
psl.get('example.example'); // 'example.example'
|
|
psl.get('b.example.example'); // 'example.example'
|
|
psl.get('a.b.example.example'); // 'example.example'
|
|
|
|
// TLD with only 1 rule.
|
|
psl.get('biz'); // null
|
|
psl.get('domain.biz'); // 'domain.biz'
|
|
psl.get('b.domain.biz'); // 'domain.biz'
|
|
psl.get('a.b.domain.biz'); // 'domain.biz'
|
|
|
|
// TLD with some 2-level rules.
|
|
psl.get('uk.com'); // null);
|
|
psl.get('example.uk.com'); // 'example.uk.com');
|
|
psl.get('b.example.uk.com'); // 'example.uk.com');
|
|
|
|
// More complex TLD.
|
|
psl.get('c.kobe.jp'); // null
|
|
psl.get('b.c.kobe.jp'); // 'b.c.kobe.jp'
|
|
psl.get('a.b.c.kobe.jp'); // 'b.c.kobe.jp'
|
|
psl.get('city.kobe.jp'); // 'city.kobe.jp'
|
|
psl.get('www.city.kobe.jp'); // 'city.kobe.jp'
|
|
|
|
// IDN labels.
|
|
psl.get('食狮.com.cn'); // '食狮.com.cn'
|
|
psl.get('食狮.公司.cn'); // '食狮.公司.cn'
|
|
psl.get('www.食狮.公司.cn'); // '食狮.公司.cn'
|
|
|
|
// Same as above, but punycoded.
|
|
psl.get('xn--85x722f.com.cn'); // 'xn--85x722f.com.cn'
|
|
psl.get('xn--85x722f.xn--55qx5d.cn'); // 'xn--85x722f.xn--55qx5d.cn'
|
|
psl.get('www.xn--85x722f.xn--55qx5d.cn'); // 'xn--85x722f.xn--55qx5d.cn'
|
|
```
|
|
|
|
### `psl.isValid(domain)`
|
|
|
|
Check whether a domain has a valid Public Suffix. Returns a `Boolean` indicating
|
|
whether the domain has a valid Public Suffix.
|
|
|
|
#### Example
|
|
|
|
```js
|
|
var psl = require('psl');
|
|
|
|
psl.isValid('google.com'); // true
|
|
psl.isValid('www.google.com'); // true
|
|
psl.isValid('x.yz'); // false
|
|
```
|
|
|
|
|
|
## Testing and Building
|
|
|
|
Test are written using [`mocha`](https://mochajs.org/) and can be
|
|
run in two different environments: `node` and `phantomjs`.
|
|
|
|
```sh
|
|
# This will run `eslint`, `mocha` and `karma`.
|
|
npm test
|
|
|
|
# Individual test environments
|
|
# Run tests in node only.
|
|
./node_modules/.bin/mocha test
|
|
# Run tests in phantomjs only.
|
|
./node_modules/.bin/karma start ./karma.conf.js --single-run
|
|
|
|
# Build data (parse raw list) and create dist files
|
|
npm run build
|
|
```
|
|
|
|
Feel free to fork if you see possible improvements!
|
|
|
|
|
|
## Acknowledgements
|
|
|
|
* Mozilla Foundation's [Public Suffix List](https://publicsuffix.org/)
|
|
* Thanks to Rob Stradling of [Comodo](https://www.comodo.com/) for providing
|
|
test data.
|
|
* Inspired by [weppos/publicsuffix-ruby](https://github.com/weppos/publicsuffix-ruby)
|
|
|
|
|
|
## License
|
|
|
|
The MIT License (MIT)
|
|
|
|
Copyright (c) 2017 Lupo Montero <lupomontero@gmail.com>
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in
|
|
all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
THE SOFTWARE.
|