A small library for turning RSS XML feeds into JavaScript objects.
npm install --save rss-parserYou can parse RSS from a URL (parser.parseURL) or an XML string (parser.parseString).
Both callbacks and Promises are supported.
Here's an example in NodeJS using Promises with async/await:
let Parser = require('rss-parser');
let parser = new Parser();
(async () => {
let feed = await parser.parseURL('https://www.reddit.com/.rss');
console.log(feed.title);
feed.items.forEach(item => {
console.log(item.title + ':' + item.link)
});
})();When using TypeScript, you can set a type to control the custom fields:
import Parser from 'rss-parser';
type CustomFeed = {foo: string};
type CustomItem = {bar: number};
const parser: Parser<CustomFeed, CustomItem> = new Parser({
customFields: {
feed: ['foo', 'baz'],
// ^ will error because `baz` is not a key of CustomFeed
item: ['bar']
}
});
(async () => {
const parser = new Parser();
const feed = await parser.parseURL('https://www.reddit.com/.rss');
console.log(feed.title); // feed will have a `foo` property, type as a string
feed.items.forEach(item => {
console.log(item.title + ':' + item.link) // item will have a `bar` property type as a number
});
})();We recommend using a bundler like webpack, but we also provide pre-built browser distributions in the
dist/folder. If you use the pre-built distribution, you'll need a polyfill for Promise support.
Here's an example in the browser using callbacks:
<script src="/node_modules/rss-parser/dist/rss-parser.min.js"></script>
<script>
// Note: some RSS feeds can't be loaded in the browser due to CORS security.
// To get around this, you can use a proxy.
const CORS_PROXY = "https://cors-anywhere.herokuapp.com/"
let parser = new RSSParser();
parser.parseURL(CORS_PROXY + 'https://www.reddit.com/.rss', function(err, feed) {
if (err) throw err;
console.log(feed.title);
feed.items.forEach(function(entry) {
console.log(entry.title + ':' + entry.link);
})
})
</script>A few minor breaking changes were made in v3. Here's what you need to know:
- You need to construct a
new Parser()before callingparseStringorparseURL parseFileis no longer available (for better browser support)optionsare now passed to the Parser constructorparsed.feedis now justfeed(top-level object removed)feed.entriesis nowfeed.items(to better match RSS XML)
Check out the full output format in test/output/reddit.json
feedUrl: 'https://www.reddit.com/.rss'
title: 'reddit: the front page of the internet'
description: ""
link: 'https://www.reddit.com/'
items:
- title: 'The water is too deep, so he improvises'
link: 'https://www.reddit.com/r/funny/comments/3skxqc/the_water_is_too_deep_so_he_improvises/'
pubDate: 'Thu, 12 Nov 2015 21:16:39 +0000'
creator: "John Doe"
content: '<a href="http://example.com">this is a link</a> & <b>this is bold text</b>'
contentSnippet: 'this is a link & this is bold text'
guid: 'https://www.reddit.com/r/funny/comments/3skxqc/the_water_is_too_deep_so_he_improvises/'
categories:
- funny
isoDate: '2015-11-12T21:16:39.000Z'- The
contentSnippetfield strips out HTML tags and unescapes HTML entities - The
dc:prefix will be removed from all fields - Both
dc:dateandpubDatewill be available in ISO 8601 format asisoDate - If
authoris specified, but notdc:creator,creatorwill be set toauthor(see article) - Atom's
updatedbecomeslastBuildDatefor consistency
If your RSS feed contains fields that aren't currently returned, you can access them using the customFields option.
let parser = new Parser({
customFields: {
feed: ['otherTitle', 'extendedDescription'],
item: ['coAuthor','subtitle'],
}
});
parser.parseURL('https://www.reddit.com/.rss', function(err, feed) {
console.log(feed.extendedDescription);
feed.items.forEach(function(entry) {
console.log(entry.coAuthor + ':' + entry.subtitle);
})
})To rename fields, you can pass in an array with two items, in the format [fromField, toField]:
let parser = new Parser({
customFields: {
item: [
['dc:coAuthor', 'coAuthor'],
]
}
})To pass additional flags, provide an object as the third array item. Currently there is one such flag:
keepArray (false)- set totrueto return all values for fields that can have multiple entries.includeSnippet (false)- set totrueto add an additional field,${toField}Snippet, with HTML stripped out
let parser = new Parser({
customFields: {
item: [
['media:content', 'media:content', {keepArray: true}],
]
}
})If your RSS Feed doesn't contain a <rss> tag with a version attribute,
you can pass a defaultRSS option for the Parser to use:
let parser = new Parser({
defaultRSS: 2.0
});rss-parser uses xml2js
to parse XML. You can pass these options
to new xml2js.Parser() by specifying options.xml2js:
let parser = new Parser({
xml2js: {
emptyTag: '--EMPTY--',
}
});You can set the amount of time (in milliseconds) to wait before the HTTP request times out (default 60 seconds):
let parser = new Parser({
timeout: 1000,
});You can pass headers to the HTTP request:
let parser = new Parser({
headers: {'User-Agent': 'something different'},
});By default, parseURL will follow up to five redirects. You can change this
with options.maxRedirects.
let parser = new Parser({maxRedirects: 100});rss-parser uses http/https module
to do requests. You can pass these options
to http.get()/https.get() by specifying options.requestOptions:
e.g. to allow unauthorized certificate
let parser = new Parser({
requestOptions: {
rejectUnauthorized: false
}
});Contributions are welcome! If you are adding a feature or fixing a bug, please be sure to add a test case
The tests run the RSS parser for several sample RSS feeds in test/input and outputs the resulting JSON into test/output. If there are any changes to the output files the tests will fail.
To check if your changes affect the output of any test cases, run
npm test
To update the output files with your changes, run
WRITE_GOLDEN=true npm test
npm run build
git commit -a -m "Build distribution"
npm version minor # or major/patch
npm publish
git push --follow-tags
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