@integromat/feedparser
Advanced tools
This module adds methods for RSS, Atom, and RDF feed parsing in node.js using Isaac Schlueter's sax parser.
Feedparser has a couple features you don't usually see:
npm install feedparser
The libxml-like helper methods have been removed. There is now just one input interface: the stream interface.
Events:
304, response - removed, as Feedparser no longer fetches urlsarticle, complete - removed; use the stream interfacedata - all readable streams will emit a data event, but this puts the
stream into "old" v0.8-style push streams (if you're using v0.10, but not
v0.12)end - stream behavior dictates that the end event will never fire if
you don't read any data from the stream; you can kick the Feedparser stream
to work like an "old" v0.8-style push stream (and get the old end event
behavior) by calling .resume().SAXErrors are emitted as error events. By default, they are automatically
resumed. Pass { resume_saxerror: false } as an option if you want to manually
handle SAXErrors (abort parsing, perhaps).
The easiest way to use feedparser is to just give it a readable stream. It will then return a readable object stream.
var FeedParser = require('feedparser')
, request = require('request');
var req = request('http://somefeedurl.xml')
, feedparser = new FeedParser([options]);
req.on('error', function (error) {
// handle any request errors
});
req.on('response', function (res) {
var stream = this;
if (res.statusCode != 200) return this.emit('error', new Error('Bad status code'));
stream.pipe(feedparser);
});
feedparser.on('error', function(error) {
// always handle errors
});
feedparser.on('readable', function() {
// This is where the action is!
var stream = this
, meta = this.meta // **NOTE** the "meta" is always available in the context of the feedparser instance
, item;
while (item = stream.read()) {
console.log(item);
}
});
I strongly encourage you to take a look at the iconv example for a very thorough working example.
normalize - Set to false to override Feedparser's default behavior,
which is to parse feeds into an object that contains the generic properties
patterned after (although not identical to) the RSS 2.0 format, regardless
of the feed's format.
addmeta - Set to false to override Feedparser's default behavior, which
is to add the feed's meta information to each article.
feedurl - The url (string) of the feed. FeedParser is very good at
resolving relative urls in feeds. But some feeds use relative urls without
declaring the xml:base attribute any place in the feed. This is perfectly
valid, but we don't know know the feed's url before we start parsing the feed
and trying to resolve those relative urls. If we discover the feed's url, we
will go back and resolve the relative urls we've already seen, but this takes
a little time (not much). If you want to be sure we never have to re-resolve
relative urls (or if FeedParser is failing to properly resolve relative urls),
you should set the feedurl option. Otherwise, feel free to ignore this option.
resume_saxerror - Set to false to override Feedparser's default behavior, which
is to emit any SAXError on error and then automatically resume parsing. In
my experience, SAXErrors are not usually fatal, so this is usually helpful
behavior. If you want total control over handling these errors and optionally
aborting parsing the feed, use this option.
See the examples directory.
Feedparser is a transform stream operating in "object mode": XML in -> Javascript objects out. Each readable chunk is an object representing an article in the feed.
meta - called with feed meta when it has been parsederror - called with error whenever there is a Feedparser error of any kind (SAXError, Feedparser error, etc.)Feedparser parses each feed into a meta (emitted on the meta event) portion
and one or more articles (emited on the data event or readable after the readable
is emitted).
Regardless of the format of the feed, the meta and each article contain a
uniform set of generic properties patterned after (although not identical to)
the RSS 2.0 format, as well as all of the properties originally contained in the
feed. So, for example, an Atom feed may have a meta.description property, but
it will also have a meta['atom:subtitle'] property.
The purpose of the generic properties is to provide the user a uniform interface
for accessing a feed's information without needing to know the feed's format
(i.e., RSS versus Atom) or having to worry about handling the differences
between the formats. However, the original information is also there, in case
you need it. In addition, Feedparser supports some popular namespace extensions
(or portions of them), such as portions of the itunes, media, feedburner
and pheedo extensions. So, for example, if a feed article contains either an
itunes:image or media:thumbnail, the url for that image will be contained in
the article's image.url property.
All generic properties are "pre-initialized" to null (or empty arrays or
objects for certain properties). This should save you from having to do a lot of
checking for undefined, such as, for example, when you are using jade
templates.
In addition, all properties (and namespace prefixes) use only lowercase letters, regardless of how they were capitalized in the original feed. ("xmlUrl" and "pubDate" also are still used to provide backwards compatibility.) This decision places ease-of-use over purity -- hopefully, you will never need to think about whether you should camelCase "pubDate" ever again.
The title and description properties of meta and the title property of
each article have any HTML stripped if you let feedparser normalize the output.
If you really need the HTML in those elements, there are always the originals:
e.g., meta['atom:subtitle']['#'].
url and title properties)link property, origlink contains the original link)guid field and the isPermalink attribute is not set to false, permalink contains the value of guid)url and title properties)url and title properties pointing to the original source for an article; see the RSS Spec for an explanation of this element)url property and possibly type and length properties)article emissions)View all the contributors.
Although node-feedparser no longer shares any code with node-easyrss, it was
the original inspiration and a starting point.
(The MIT License)
Copyright (c) 2011-2015 Dan MacTough and contributors
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
FAQs
Robust RSS Atom and RDF feed parsing using sax js
The npm package @integromat/feedparser receives a total of 243 weekly downloads. As such, @integromat/feedparser popularity was classified as not popular.
We found that @integromat/feedparser demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 10 open source maintainers collaborating on the project.
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