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Feat: Cache search results for an hour so other ?i= are free and fast

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A search's result URLs are kept in SurrealDB (results table) for 1 hour,
fetched in the same transaction as the rate limit. Other ?i= of the query
then skip the Brave/Bing search and don't count toward the daily limit.
The record also tracks which results worked (pos) and how far it got
(next), so an already-known ?i= downloads only its own image and a new one
carries on from where the last left off. free.* searches Openverse and
Wikimedia together so its whole list can be cached. Empty results aren't
cached, since they can mean Brave and Bing failed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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2026-10-12 14:07:51 +00:00
co-authored by Claude Opus 5.5
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@@ -129,13 +129,13 @@ Use images to complement your responses, powered by Brave.</code></pre>
<tr><td>New AI Images</td><td><span data-limit="AI_DAILY_LIMIT">100</span> per day per IP</td><td>Limit image served</td></tr>
</tbody>
</table>
<p style="font-size:0.85rem;color:var(--text-muted);">* free.direct-img.link and ai.direct-img.link each have their own daily limit, separate from the main site's. Cached images don't count toward it and keep loading after you hit it. The burst limit applies to all image requests and is enforced approximately. The daily limit resets at 00:00 UTC.</p>
<p style="font-size:0.85rem;color:var(--text-muted);">* free.direct-img.link and ai.direct-img.link each have their own daily limit, separate from the main site's. Cached images don't count toward it and keep loading after you hit it. Neither do other <code>?i=</code> values of a query searched in the last hour. The burst limit applies to all image requests and is enforced approximately. The daily limit resets at 00:00 UTC.</p>
</section>
<section>
<div class="card">
<h3>Caching</h3>
<p>Images are cached for 90 days. Subsequent requests for the same query are served instantly. Searches that find nothing serve an AI image instead, cached the same way.</p>
<p>Images are cached for 90 days. Subsequent requests for the same query are served instantly. A search's results are kept for an hour, so trying other <code>?i=</code> values right after is free and fast. Searches that find nothing serve an AI image instead, cached the same way.</p>
</div>
</section>