@debank/parse-favicon

NOTICE: This repo is forked from parse-favicon, can be ONLY delivered & used in @debank scope, all rights reserved by original author.

Parse HTML to get icon information.

Install

npm install --save @debank/parse-favicon
# or
yarn add @debank/parse-favicon

Usage

import { parseFavicon } from '@debank/parse-favicon'

const pageUrl = 'https://github.com'

parseFavicon(pageUrl, textFetcher, bufferFetcher).subscribe(icon => console.log(icon))

async function textFetcher(url) {
  return await fetch(resolveUrl(url, pageUrl)).then(res => res.text())
}

async function bufferFetcher(url) {
  return await fetch(resolveUrl(url, pageUrl)).then(res => res.arrayBuffer())
}

function resolveUrl(url, base) {
  return new URL(url, base).href
}

API

parseFavicon

parseFavicon(
  url: string
, textFetcher: TextFetcher
, bufferFetcher?: BufferFetcher
): Observable<Icon>

type TextFetcher = (url: string) => PromiseLike<string>
type BufferFetcher = (url: string) => PromiseLike<ArrayBuffer>

interface Icon {
  url: string
  reference: string
  type: null | string
  size: null | 'any' | Size | Size[]
}

interface Size {
  width: number
  height: number
}

parseFavicon accepts textFetcher and bufferFetcher for further fetching requests when parsing icons, bufferFetcher is optional. If you need actual icon sizes and type, should provide bufferFetcher.

References related to textFetcher:

• <meta name="msapplication-config" content="path/to/ieconfig.xml">
• <link rel="manifest" href="path/to/manifest.webmanifest">

References related to bufferFetcher:

• /favicon.ico
• /apple-touch-icon-57x57-precomposed.png
• /apple-touch-icon-57x57.png
• /apple-touch-icon-72x72-precomposed.png
• /apple-touch-icon-72x72.png
• /apple-touch-icon-114x114-precomposed.png
• /apple-touch-icon-114x114.png
• /apple-touch-icon-120x120-precomposed.png
• /apple-touch-icon-120x120.png
• /apple-touch-icon-144x144-precomposed.png
• /apple-touch-icon-144x144.png
• /apple-touch-icon-152x152-precomposed.png
• /apple-touch-icon-152x152.png
• /apple-touch-icon-180x180-precomposed.png
• /apple-touch-icon-180x180.png
• /apple-touch-icon-precomposed.png
• /apple-touch-icon.png

Support references

• <link rel="icon" href="path/to/icon.png">
• <link rel="shortcut icon" href="path/to/icon.ico">
• <link rel="apple-touch-icon" href="path/to/icon.png">
• <link rel="apple-touch-icon-precomposed" href="path/to/icon.png">
• <link rel="manifest" href="path/to/manifest.webmanifest">
• <link rel="fluid-icon" href="path/to/icon.png">
• <link rel="mask-icon" href="path/to/icon.svg">
• <meta name="msapplication-TileImage" content="path/to/icon.png">
• <meta name="msapplication-config" content="path/to/ieconfig.xml">
• <meta name="msapplication-square70x70logo" content="path/to/icon.png">
• <meta name="msapplication-square150x150logo" content="path/to/icon.png">
• <meta name="msapplication-square310x310logo" content="path/to/icon.png">
• <meta name="msapplication-wide310x150logo" content="path/to/icon.png">
• /favicon.ico
• /apple-touch-icon-57x57-precomposed.png
• /apple-touch-icon-57x57.png
• /apple-touch-icon-72x72-precomposed.png
• /apple-touch-icon-72x72.png
• /apple-touch-icon-114x114-precomposed.png
• /apple-touch-icon-114x114.png
• /apple-touch-icon-120x120-precomposed.png
• /apple-touch-icon-120x120.png
• /apple-touch-icon-144x144-precomposed.png
• /apple-touch-icon-144x144.png
• /apple-touch-icon-152x152-precomposed.png
• /apple-touch-icon-152x152.png
• /apple-touch-icon-180x180-precomposed.png
• /apple-touch-icon-180x180.png
• /apple-touch-icon-precomposed.png
• /apple-touch-icon.png