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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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5
.env.example
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@@ -7,6 +7,11 @@ BOT_DISPLAY_NAME=GogoBee
# Which rooms the bot posts scheduled content to (comma-separated room IDs)
BROADCAST_ROOMS=!roomid:example.com
# The daily 08:00 WOTD auto-post is disabled by default.
# Set to true to enable it. The !wotd command and passive WOTD
# usage tracking work regardless of this setting.
ENABLE_WOTD_POST=false
# Admins who can run admin-only commands (comma-separated Matrix user IDs)
ADMIN_USERS=@yourmxid:example.com