Twitter no longer offers an RSS feed. That thread offers a few workarounds which involve external or non-free services or require creating a Twitter account. One of those external services, TwitRSS.me is open-source with its code on GitHub. This code can be run locally to view Twitter streams in Liferea (or any other news aggregator) without relying on an external service.
Specifically, the Perl script twitter_user_to_rss.pl is
the relevant part. It's intended to be used on a webserver,
so the output includes HTTP headers:
Content-type: application/rss+xml
Cache-control: max-age=1800
<?xml version="1.0" encoding="UTF-8"?>
...
which can be cleaned out with tail in the script
twitter_user_to_rss_file, which assumes it's in the same directory as
twitter_user_to_rss.pl:
#!/bin/sh
"$(dirname "$0")/twitter_user_to_rss.pl" "user=$1&replies=1" \
| tail -n +4
twitter_user_to_rss_file also handles the argument format of the
script, so it just takes a single argument which is the Twitter
username. The replies=1 part tells the script to use the Tweets &
replies
view which includes tweets that begin with @
.
When creating a subscription in Liferea, the advanced options include
a choice of source type. To use the script, set the source type to
Command
and the source to
/path/to/twitter_user_to_rss_file username
My version of twitter_user_to_rss.pl includes
a few differences from the original that make it a bit more
usable. Most importantly, links are made into actual links (based on
this code), images are included in the feed content,
tweets are marked with their creator to make it easier to follow
retweets and combinations of tweets from multiple feeds together in a
single stream.