Dragonfly feeds | Dragonfly web framework

Reading feeds from other websites

Dragonfly provides some simple functions for reading atom feeds (RSS will follow). The name Atom applies to a pair of related standards. The Atom Syndication Format is an XML language used for web feeds, while the Atom Publishing Protocol (AtomPub or APP) is a simple HTTP-based protocol for creating and updating web resources. (source: wikipedia.org)

There are two functions in plugins-active/dragonfly_basic.lsp for reading feeds: read-atom-feed and read-rss-feed. They can be used to read feeds server-side. If you want to load a feed on the client's side, use AJAX and Javascript instead for faster page loads and to offload work from the server.

Example: displaying an atom feed

The following will display all of the entries from the atom feed as HTML:

<% (read-atom-feed "http://website.com/atomfeed.xml") %>

If you'd like to limit the number of entries shown:

<% (read-atom-feed "http://website.com/atomfeed.xml" 3) %>

If you want to see the raw XML without limiting the number of entries:

<% (read-atom-feed "http://website.com/atomfeed.xml" nil true) %>

The read-rss-feed function works in the same manner. These functions are used to display the feed below:

NYTimes.com (RSS)

North Korea, Stacey Abrams, Philip Roth: Your Wednesday Briefing
Wed, 23 May 2018 16:31:15 GMT nil

Here’s what you need to know to start your day.

New York Today: New York Today: The Scourge of Plastic Straws
Wed, 23 May 2018 10:00:08 GMT nil

Wednesday: A proposed ban, New York’s big comeback, and an anniversary for the public library.

California Today: California Today: Experts on Fire Season 2018 Discuss the ‘New Normal’
Wed, 23 May 2018 13:22:56 GMT nil

Wednesday: A battle for second place in the governor’s race, a death in Yosemite and Golden State comes up short.

Rendered in 305 milliseconds. Used 161 KB of memory, 135 KB for Lisp Cells.