In a previous post, I mentioned that my vision of a feed-based social network included the use of rssCloud as the notification system within RSS feeds. Back in 2022, I did some investigation regarding support of the rssCloud protocol in WordPress.com and WordPress.org sites, and using FeedLand as the most prominent feed reader supporting the rssCloud protocol. It turned out that although WordPress.com sites had included support for rssCloud since 2009, and WordPress.org sites through the use of the RSS Cloud WordPress plugin, there was some misunderstanding about what a client needed to do to register with the WordPress rssCloud support. This Github gist goes into the details, but to summarize, the client trying to register with WordPress needs to be running on port 80 or 443 to be recognized. Both Feedland and the River5 feed reader (the two prominent feed readers supporting rssCloud notification) did not necessarily run on those ports, and as a result the “real-time” notification of rssCloud did not occur. Those feed readers were able to read the WordPress RSS feed and display updates, but not in real-time.

FeedLand was updated and now supports WordPress rssCloud registration. As part of that effort, Dave Winer created a rssCloud server demo project to use to check rssCloud server implementations. I decided to check this out with a WordPress.com site and a WordPress.org site using the RSS Cloud plugin. On my server, I am using the Caddy web server, and had some subdomains being hosted through Caddy. I updated the rssCloud demo code to use the port I am running on, and to use one of those subdomains with Caddy doing a reverse proxy so that the app would appear to be running on port 80. My test was successful! I was able to see the app register with both the WordPress.com and WordPress.org sites, and to see the app respond when the sites notified the app of a new post. Here is my copy of the main app and the stats file created by the app.

This is an important step in creating the feed-based social network I have in mind. WordPress is the largest generator of RSS feeds supporting rssCloud, so it is important to understand how the WordPress rssCloud implementation works to make sure that apps interacting in this social network can get real-time updates from WordPress sites.