npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@extractus/feed-extractor

v7.1.3

Published

To read and normalize RSS/ATOM/JSON feed data

Downloads

15,327

Readme

feed-extractor

To read & normalize RSS/ATOM/JSON feed data.

npm version CodeQL CI test Coverage Status

(This library is derived from feed-reader renamed.)

Demo

Install & Usage

Node.js

npm i @extractus/feed-extractor
import { extract } from '@extractus/feed-extractor'

// extract a RSS
const result = await extract('https://news.google.com/rss')
console.log(result)

Deno

import { extract } from 'npm:@extractus/feed-extractor'

Browser

import { extract } from 'https://esm.sh/@extractus/feed-extractor'

Please check the examples for reference.

Automate RSS feed extraction with GitHub Actions

RSS Feed Fetch Action is a GitHub Action designed to automate the fetching of RSS feeds. It fetches an RSS feed from a given URL and saves it to a specified file in your GitHub repository. This action is particularly useful for populating content on GitHub Pages websites or other static site generators.

CJS Deprecated

CJS is deprecated for this package. When calling require('@extractus/feed-extractor') a deprecation warning is now logged. You should update your code to use the ESM export.

  • You can ignore this warning via the environment variable FEED_EXTRACTOR_CJS_IGNORE_WARNING=true
  • To see where the warning is coming from you can set the environment variable FEED_EXTRACTOR_CJS_TRACE_WARNING=true

APIs

Note:

  • Old method read() has been marked as deprecated and will be removed in next major release.

extract()

Load and extract feed data from given RSS/ATOM/JSON source. Return a Promise object.

Syntax

extract(String url)
extract(String url, Object parserOptions)
extract(String url, Object parserOptions, Object fetchOptions)

Example:

import { extract } from '@extractus/feed-extractor'

const result = await extract('https://news.google.com/atom')
console.log(result)

Without any options, the result should have the following structure:

{
  title: String,
  link: String,
  description: String,
  generator: String,
  language: String,
  published: ISO Date String,
  entries: Array[
    {
      id: String,
      title: String,
      link: String,
      description: String,
      published: ISO Datetime String
    },
    // ...
  ]
}

Parameters

url required

URL of a valid feed source

Feed content must be accessible and conform one of the following standards:

parserOptions optional

Object with all or several of the following properties:

  • normalization: Boolean, normalize feed data or keep original. Default true.
  • useISODateFormat: Boolean, convert datetime to ISO format. Default true.
  • descriptionMaxLen: Number, to truncate description. Default 250 characters. Set to 0 = no truncation.
  • xmlParserOptions: Object, used by xml parser, view fast-xml-parser's docs
  • getExtraFeedFields: Function, to get more fields from feed data
  • getExtraEntryFields: Function, to get more fields from feed entry data
  • baseUrl: URL string, to absolutify the links within feed content

For example:

import { extract } from '@extractus/feed-extractor'

await extract('https://news.google.com/atom', {
  useISODateFormat: false
})

await extract('https://news.google.com/rss', {
  useISODateFormat: false,
  getExtraFeedFields: (feedData) => {
    return {
      subtitle: feedData.subtitle || ''
    }
  },
  getExtraEntryFields: (feedEntry) => {
    const {
      enclosure,
      category
    } = feedEntry
    return {
      enclosure: {
        url: enclosure['@_url'],
        type: enclosure['@_type'],
        length: enclosure['@_length']
      },
      category: isString(category) ? category : {
        text: category['@_text'],
        domain: category['@_domain']
      }
    }
  }
})
fetchOptions optional

fetchOptions is an object that can have the following properties:

  • headers: to set request headers
  • proxy: another endpoint to forward the request to
  • agent: a HTTP proxy agent
  • signal: AbortController signal or AbortSignal timeout to terminate the request

For example, you can use this param to set request headers to fetch as below:

import { extract } from '@extractus/feed-extractor'

const url = 'https://news.google.com/rss'
await extract(url, null, {
  headers: {
    'user-agent': 'Opera/9.60 (Windows NT 6.0; U; en) Presto/2.1.1'
  }
})

You can also specify a proxy endpoint to load remote content, instead of fetching directly.

For example:

import { extract } from '@extractus/feed-extractor'

const url = 'https://news.google.com/rss'

await extract(url, null, {
  headers: {
    'user-agent': 'Opera/9.60 (Windows NT 6.0; U; en) Presto/2.1.1'
  },
  proxy: {
    target: 'https://your-secret-proxy.io/loadXml?url=',
    headers: {
      'Proxy-Authorization': 'Bearer YWxhZGRpbjpvcGVuc2VzYW1l...'
    }
  }
})

Passing requests to proxy is useful while running @extractus/feed-extractor on browser. View examples/browser-feed-reader as reference example.

Another way to work with proxy is use agent option instead of proxy as below:

import { extract } from '@extractus/feed-extractor'

import { HttpsProxyAgent } from 'https-proxy-agent'

const proxy = 'http://abc:[email protected]:31113'

const url = 'https://news.google.com/rss'

const feed = await extract(url, null, {
  agent: new HttpsProxyAgent(proxy),
})
console.log('Run feed-extractor with proxy:', proxy)
console.log(feed)

For more info about https-proxy-agent, check its repo.

By default, there is no request timeout. You can use the option signal to cancel request at the right time.

The common way is to use AbortControler:

const controller = new AbortController()

// stop after 5 seconds
setTimeout(() => {
  controller.abort()
}, 5000)

const data = await extract(url, null, {
  signal: controller.signal,
})

A newer solution is AbortSignal's timeout() static method:

// stop after 5 seconds
const data = await extract(url, null, {
  signal: AbortSignal.timeout(5000),
})

For more info:

extractFromJson()

Extract feed data from JSON string. Return an object which contains feed data.

Syntax

extractFromJson(String json)
extractFromJson(String json, Object parserOptions)

Example:

import { extractFromJson } from '@extractus/feed-extractor'

const url = 'https://www.jsonfeed.org/feed.json'
// this resource provides data in JSON feed format
// so we fetch remote content as json
// then pass to feed-extractor
const res = await fetch(url)
const json = await res.json()

const feed = extractFromJson(json)
console.log(feed)

Parameters

json required

JSON string loaded from JSON feed resource.

parserOptions optional

See parserOptions above.

extractFromXml()

Extract feed data from XML string. Return an object which contains feed data.

Syntax

extractFromXml(String xml)
extractFromXml(String xml, Object parserOptions)

Example:

import { extractFromXml } from '@extractus/feed-extractor'

const url = 'https://news.google.com/atom'
// this resource provides data in ATOM feed format
// so we fetch remote content as text
// then pass to feed-extractor
const res = await fetch(url)
const xml = await res.text()

const feed = extractFromXml(xml)
console.log(feed)

Parameters

xml required

XML string loaded from RSS/ATOM feed resource.

parserOptions optional

See parserOptions above.

Test

git clone https://github.com/extractus/feed-extractor.git
cd feed-extractor
pnpm i
pnpm test

feed-extractor-test.png

Quick evaluation

git clone https://github.com/extractus/feed-extractor.git
cd feed-extractor
pnpm i
pnpm eval https://news.google.com/rss

License

The MIT License (MIT)

Support the project

If you find value from this open source project, you can support in the following ways:

  • Give it a star ⭐
  • Buy me a coffee: https://paypal.me/ndaidong 🍵
  • Subscribe Feed Reader service on RapidAPI 😉

Thank you.