Document page caching algorithm

[makew0rld]

Amfora has an algorithm to determine which pages to cache and when. This should be documented in a new wiki page.

[makew0rld]

• All text pages loaded over the network are cached, unless a client cert was sent with the request
• Gemini pages loaded from a proxy are cached
• about: pages are not cached, although sometimes they're static and in-memory anyway, like about:version
• file:// pages are not cached

.

• The cache is optionally limited by size and/or number of pages, as set in the config file
  • The pages cached first will be removed first: a FIFO queue
• It is also configurably limited by a timeout, so if the page was cached more than X seconds ago, it will be kept in memory but never used again
  • This out-of-date page being kept in memory will be replaced if an up-to-date version of the page is cached
  • It could also be removed due to size or number of pages limits

[makew0rld]

Wiki page created: https://github.com/makeworld-the-better-one/amfora/wiki/Caching