I’ve previously covered Page2RSS service that turns changes on web page into RSS feed. It’s simple to use but not very precise. More complex and sophisticated service would be Feed43.
What it does
Feed43 serves same purpose – providing RSS feed for sites without one . However instead of using internal algorithms to detect changes it offers pattern-based recognition to form RSS items from specific parts of page. User has to form pattern manually.
It’s kinda hard to explain and pattern engine is proprietary (why not use popular and standard regexp ?). Luckily there is pretty good and visual documentation .
One of the features I like most that feed is formed in real time . There is no caching or update interval – when you pull feed it contains exactly what site has at moment.
There are some limitations for free accounts :
- updating no more often than every 6 hours (blog actually says it takes 96 requests in 24 hours to get temporarily banned);
- max 100Kb source page size;
- max 20 items in feed.
There is also pretty annoying server time limit – if your pattern takes too long to process (over few seconds) it will be discarder and you get message that you have to optimize it.
Service is powerful and very precise but limitations make it unusable on heavy pages or where complex patterns are needed. Still it provides level of control over feed forming few alternatives can match.
Home page http://feed43.com/
FilterMyRSS.com – light online filter for feeds | Rarst.net #