Files
webmail/app
Linus Rath f716ea66ee fix: ask before a share starts a message and save nothing until the first edit
Any site could POST a form to the share target on load: with no clicks
the composer opened with its subject and file, and autosave stored a
real draft on the server 2 seconds later. The worker can't see where a
POST came from, and Chromium's link capturing accepts form submissions,
so an installed-app window proves nothing either.

- every share landing now asks first, in every window and browser; a
  text landing address gets the same question. Nothing goes up before
  the answer.
- handed-in text and files are the composer's starting state: no
  autosave, page-close save or sign-out flush before the first real
  edit.
- the worker ignores frames, keeps at most 5 entries and 100 MB for 15
  minutes, sweeps on activate, on each share and from a page timer,
  and seals what it keeps with a key passed in the landing fragment.
  Offline wipes clear it too.
- the server fallback uses the fragment and caps by encoded length:
  3000 Japanese characters made a 27 KB `Location` and a 431.
- a second compose handoff waits until the composer closes, also one
  set aside by reading a message, where it used to replace the first.
- a launch leaving the mail page saves what was just typed first.
- an expired handoff or a missing stored file now says so; shares get
  the control-character stripping and limits of `parseMailto`.

Existing tests changed because the landing moved from the query to the
fragment, stored entries gained a sealed part, and a share now asks
first.
2026-11-03 07:08:38 +01:00
..