Files
thefeed/internal/web
Sepehr 2bd4835674 feat: lazy background title fetch with disk cache and backoff
- Persist display names in per-channel JSON cache files (Name +
  DisplayName fields on cachedChannel). GetAllTitles reads all ch_*.json
  files; PutTitle updates a channel file in-place without losing messages.

- Replace blocking FetchTitles calls in fetchMeta and refreshChannel with
  an instant disk read (GetAllTitles) applied before the SSE broadcast,
  so channels appear with cached titles immediately on every load.

- ensureTitlesFetched runs in a single background goroutine (titlesMu +
  titlesLoading guard prevents duplicates). On success it persists titles
  and pushes an SSE update. On error or empty response it backs off for
  5 minutes so an old server does not cause endless retries.

- Block 0 of TitlesChannel now carries a uint16 total-block-count prefix
  (added in rebuildTitlesBlocks). FetchTitles reads the count from block 0
  and fetches all remaining blocks in parallel instead of sequentially.

- FetchTitles timeout raised from 10 s to 1 minute.
2026-04-21 21:19:29 -04:00
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