What actually happens when you open an RSS feed?
When you open a feed, the result looks like a normal web page. Behind the scenes, several small technical steps happen.
about 2 min read
1. Check the address
First, your input is turned into a usable address. If the protocol is missing, it can be added. If the target is clearly unsuitable, it is rejected.
2. Find or load the feed
With a direct feed URL, the reader can fetch the feed immediately. With a normal website address, it can look for embedded feed hints.
Once a feed is found, its XML is loaded.
3. Understand the XML
The parser reads titles, links, entries, dates, authors and other fields. These raw values are then normalized into an internal structure.
Technical details about RSS fields are listed in RSS Elements.
4. Display it safely
Finally, the content is rendered as HTML. External content, links and images need to be handled so the output remains readable and as safe as possible.