There's also some 'magic' potential here to have a proxy that detects whether th...

		crooked-v on Dec 22, 2019 \| parent \| context \| favorite \| on: Show HN: Local Node.js app to save everything you ... There's also some 'magic' potential here to have a proxy that detects whether there's a live network interface or not (including some sanity checking against captive portals), passes through the live sites while recording when there is a connection, and serves from the last recorded versions when there isn't.

Sounds like a local squid proxy setup from the early 2000s...