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Race the CDN and the proxy, for thumbnails and for playback

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A thumbnail used to try the provider and only ask /api/image once that
had failed, so every hotlink-blocked host cost a wasted request per card
before anything appeared. Both routes now go out together for the first
thumbnail of a host, and the rest of the batch waits on that one answer
rather than each rediscovering it. Speed decides which image is shown;
capability decides what the host is remembered as, since the proxy tends
to win first contact merely for being same-origin -- pinning a host to it
over that would push a whole page of thumbnails through our own server.

Playback asks the same question, but per video and at play time: one
provider can spread its media over several CDNs, so there is nothing
useful to pre-compute, and the old per-card probe answered for whichever
card happened to scroll past. The direct route is now tested alongside
the proxied playback and takes over if it answers before a frame is
decoded. Whatever loses is cancelled -- the token guards stopped stale
callbacks but left their requests running, so the losing route kept
pulling bytes and the server kept an upstream connection open for them.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QBDkEXP4htyXTCZUwMLphd
This commit is contained in:
Simon
2026-09-08 12:48:18 +00:00
parent e2632c962d
commit 74b719b2ea
5 changed files with 444 additions and 109 deletions
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4
frontend/js/feed.js
View File

@@ -424,7 +424,7 @@ App.feed = App.feed || {};
const liveBadge = v.isLive ? '<span class="live-badge feed-live-badge">● LIVE</span>' : '';
const favKey = App.favorites ? App.favorites.getKey(v) : null;
slide.innerHTML = `
<img class="feed-poster" src="${v.thumb || ''}" alt="" loading="lazy" decoding="async">
<img class="feed-poster" alt="" loading="lazy" decoding="async">
<video class="feed-video" muted playsinline webkit-playsinline preload="none"></video>
${liveBadge}
${favKey ? `<button class="favorite-btn feed-fav-btn" type="button" data-fav-key="${favKey}" data-fav-url="${v.url || ''}"></button>` : ''}
@@ -446,7 +446,7 @@ App.feed = App.feed || {};
</div>
`;
const poster = slide.querySelector('.feed-poster');
App.videos.attachNoReferrerRetry(poster);
App.videos.attachThumbnail(poster, v.thumb);
const slideVideo = slide.querySelector('.feed-video');
bindTimeline(slide, slideVideo);
bindSharedControls(slide, slideVideo, v);