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Link thumbnails: post og:image previews + WOTD default-off

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URL link previews now post the page's og:image as an inline m.image
thumbnail above the title/description reply. All outbound fetches in the
preview path (page scrape, image HEAD probe, image download) route through
a new SSRF/DoS-hardened safehttp client so a posted link can't steer
fetches at loopback/RFC1918/cloud-metadata IPs or OOM the parser.

Also flips the daily WOTD auto-post to opt-in (ENABLE_WOTD_POST=true)
instead of opt-out.
This commit is contained in:
prosolis
2026-06-24 21:55:25 -07:00
parent cbfca525f5
commit 8122973b74
7 changed files with 443 additions and 37 deletions
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22
internal/db/db.go
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@@ -333,6 +333,9 @@ func runMigrations(d *sql.DB) error {
// engages when a fork / elite / boss / supply pinch actually
// needs a decision. CAS-claim on this column gates re-entry.
`ALTER TABLE dnd_expedition ADD COLUMN last_autorun_at DATETIME`,
// URL link previews now post the page's og:image/twitter:image
// thumbnail; cache it alongside the title/description.
`ALTER TABLE url_cache ADD COLUMN image_url TEXT NOT NULL DEFAULT ''`,
}
for _, stmt := range columnMigrations {
if _, err := d.Exec(stmt); err != nil {
@@ -1124,6 +1127,7 @@ CREATE TABLE IF NOT EXISTS url_cache (
url TEXT PRIMARY KEY,
title TEXT DEFAULT '',
description TEXT DEFAULT '',
image_url TEXT NOT NULL DEFAULT '',
cached_at INTEGER DEFAULT (unixepoch())
);
@@ -2041,15 +2045,15 @@ func SeedSchedulerDefaults(d *sql.DB) error {
name string
cron string
}{
{"prefetch", "5 0 * * *"}, // 00:05 daily
{"maintenance", "0 3 * * *"}, // 03:00 daily
{"wotd", "0 8 * * *"}, // 08:00 daily
{"holidays", "0 7 * * *"}, // 07:00 daily
{"releases", "0 9 * * 1"}, // 09:00 Monday
{"birthday_check", "0 6 * * *"}, // 06:00 daily
{"anime_releases", "0 10 * * *"},// 10:00 daily
{"movie_releases", "0 11 * * *"},// 11:00 daily
{"concert_digest", "0 12 * * 0"},// 12:00 Sunday
{"prefetch", "5 0 * * *"}, // 00:05 daily
{"maintenance", "0 3 * * *"}, // 03:00 daily
{"wotd", "0 8 * * *"}, // 08:00 daily
{"holidays", "0 7 * * *"}, // 07:00 daily
{"releases", "0 9 * * 1"}, // 09:00 Monday
{"birthday_check", "0 6 * * *"}, // 06:00 daily
{"anime_releases", "0 10 * * *"}, // 10:00 daily
{"movie_releases", "0 11 * * *"}, // 11:00 daily
{"concert_digest", "0 12 * * 0"}, // 12:00 Sunday
}
stmt, err := d.Prepare(`INSERT OR IGNORE INTO scheduler_config (job_name, cron_expr) VALUES (?, ?)`)