https://github.com/dashlane/swiftdomainparser

A Full Swift Lightweight Framework that uses the Public Suffix list to Parse URLs
https://github.com/dashlane/swiftdomainparser

parse parseurl psl public-suffix-list swift

Last synced: 29 days ago
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A Full Swift Lightweight Framework that uses the Public Suffix list to Parse URLs

• Host: GitHub
• URL: https://github.com/dashlane/swiftdomainparser
• Owner: Dashlane
• License: mit
• Created: 2018-07-24T13:24:46.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2024-01-03T14:39:02.000Z (12 months ago)
• Last Synced: 2024-04-25T15:02:35.822Z (8 months ago)
• Topics: parse, parseurl, psl, public-suffix-list, swift
• Language: Swift
• Size: 150 KB
• Stars: 61
• Watchers: 18
• Forks: 20
• Open Issues: 0
• Metadata Files:
  • Readme: Readme.md
  • License: LICENSE

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README

        
# Domain Parser

![Platforms](https://img.shields.io/badge/Platforms-iOS_macOS-blue.svg?style=flat)

[![License](https://img.shields.io/badge/License-MIT-blue.svg?style=flat)](https://github.com/Dashlane/SwiftDomainParser/blob/master/LICENSE)

[![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)

[![Swift Package Manager compatible](https://img.shields.io/badge/Swift_Package_Manager-compatible-4BC51D.svg?style=flat)](https://www.swift.org/package-manager/)

A full-Swift simple library which allows the parsing of hostnames, using the [Public Suffix List](https://publicsuffix.org).

This Library allows finding the ***domain name*** and the ***public suffix*** / ***top-level-domain*** for a given URL. 

## What is the Public Suffix List ?

The PSL lists all the known public suffixes (like: `com`, `co.uk`, `nt.edu.au`, ...). 

Without this information we are not able to determine which part of a URL is the domain, since a suffix can have more than one Label. A suffix rule may also contain wildcards or exceptions to wildcards. If you want to understand the full format of PSL matching rules, you can read their specification [here](https://github.com/publicsuffix/list/wiki/Format#format).

The PSL is continuously updated.

The list includes ICANN suffixes (official top level domains) but also private suffixes (like `us-east-1.amazonaws.com`).

Examples: 

| URL host                   | Domain          | Public suffix | Matched PSL rule | Explanation    |

|---------------------------:|:---------------:|:-------------:|:----------------:|:---------------|

| `auth.impala.dashlane.com` | `dashlane.com`  | `com`         | `com`            | Simple rule    |

| `sub.domain.co.uk`         | `domain.co.uk`  | `co.uk`       | `co.uk`          | Simple rule    |

| `sub.domain.gov.ck`        | `domain.gov.ck` | `gov.ck`      | `*.ck`           | Wildcard rule  |

| `sub.domain.any.ck`        | `domain.any.ck` | `any.ck`      | `*.ck`           | Wildcard rule  |

| `sub.sub.domain.any.ck`    | `domain.any.ck` | `any.ck`      | `*.ck`           | Wildcard rule  |

| `www.ck`                   | `www.ck`        | `ck`          | `!www.ck`        | Exception rule |

| `sub.www.ck`               | `www.ck`        | `ck`          | `!www.ck`        | Exception rule |

| `sub.sub.www.ck`           | `www.ck`        | `ck`          | `!www.ck`        | Exception rule |

## Usage 

#### Initialization: 

```

import DomainParser

...

let domainParser = try DomainParser()

```

You should use the same instance when you parse multiple URL hosts.

``` 

let domain: String? = domainParser.parse(host: "awesome.dashlane.com")?.domain

print(domain ?? "N/A") // dashlane.com

```

``` 

let suffix1: String? = domainParser.parse(host: "awesome.dashlane.com")?.publicSuffix

print(suffix1 ?? "N/A") // com

let suffix2: String? = domainParser.parse(host: "awesome.dashlane.co.uk")?.publicSuffix

print(suffix2 ?? "N/A") // co.uk

```

## Update the local Public Suffix List 

The local PSL used by the library is located at `DomainParser/DomainParser/Resources/public_suffix_list.dat`.

To update it, run this Terminal command in the `script` folder: 

``` 

swift UpdatePSL.swift 

```