@extractus/feed-extractor

feed-extractor

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

Attention

feed-reader has been renamed to @extractus/feed-extractor since v6.1.4

Demo

• Give it a try!
• Example FaaS

Install & Usage

Node.js

npm i @extractus/feed-extractor

# pnpm
pnpm i @extractus/feed-extractor

# yarn
yarn add @extractus/feed-extractor

// es6 module
import { read } from '@extractus/feed-extractor'

// CommonJS
const { read } = require('@extractus/feed-extractor')

// you can specify exactly path to CommonJS version
const { read } = require('@extractus/feed-extractor/dist/cjs/feed-extractor.js')

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

Deno

// deno < 1.28
import { read } from 'https://esm.sh/@extractus/feed-extractor'

// deno > 1.28
import { read } from 'npm:@extractus/feed-extractor'

Browser

import { read } from 'https://unpkg.com/@extractus/feed-extractor@latest/dist/feed-extractor.esm.js'

Please check the examples for reference.

APIs

read()

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

Syntax

read(String url)
read(String url, Object options)
read(String url, Object options, Object fetchOptions)

Parameters

url required

URL of a valid feed source

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

• RSS Feed
• ATOM Feed
• JSON Feed

For example:

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

const result = await read('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[
    {
      title: String,
      link: String,
      description: String,
      published: ISO Datetime String
    },
    // ...
  ]
}

options 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 210 (characters).
• 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

For example:

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

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

await read('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

You can use this param to set request headers to fetch.

For example:

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

const url = 'https://news.google.com/rss'
await read(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 { read } from '@extractus/feed-extractor'

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

await read(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.

Test

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

Quick evaluation

git clone https://github.com/extractus/feed-extractor.git
cd feed-extractor
npm install

npm run eval https://news.google.com/rss

License

The MIT License (MIT)

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