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5901067d8a
st-sync.js wraps SyncManager, the native protocol. Three properties drove the shape of it. It repeats the sync broadcast at 1Hz so a player powered on late still joins, which means acting on every repeat would reload the video once a second forever — on screen that reads as a stutter, not as a sync fault, so the id dedupe is mandatory rather than an optimisation. The leader starts from its OWN broadcast rather than at announce() time, or it runs ahead of the group by the width of the network. And attachVideo refuses an element with no setSyncParams instead of half-syncing it. offline.html is the local fallback the host falls back to after three failed loads. It names the server, keeps probing with capped backoff so a site full of panels cannot storm a server that is coming back, and asks the HOST to restart the player when it answers — never navigating itself, for the same reason the player never reloads itself here. The resolver now models multicast reach. All-BrightSign groups spread across subnets no longer get native sync: each subnet would sync neatly within itself while drifting from the others, and the dashboard would show a healthy group throughout. The IP comparison is a heuristic so it is used in one direction only — differing networks are evidence against, matching ones are never proof for, and unknown addresses block nothing. st-sync.js is served from its single source like the bridge, and the SD card deliberately carries neither: the player pulls both from the server so a stale copy on a card can never skew from the player using it. 948 pass. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Uaeo9MvzKoyXuN6ZsbhtkL
120 lines
4.5 KiB
HTML
120 lines
4.5 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>ScreenTinker — reconnecting</title>
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<style>
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/* Deliberately self-contained: this page is the thing that shows when the network is gone,
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so it can never depend on a font, a stylesheet or an image it would have to fetch. */
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html, body {
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margin: 0; height: 100%;
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background: #0d1117; color: #c9d1d9;
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font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
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display: flex; align-items: center; justify-content: center;
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}
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.card { text-align: center; max-width: 70vw; }
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h1 { font-size: 3.2vw; font-weight: 600; margin: 0 0 1.2vh; color: #e6edf3; }
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p { font-size: 1.6vw; line-height: 1.5; margin: 0.6vh 0; color: #8b949e; }
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.server { font-family: ui-monospace, "SF Mono", Menlo, monospace; color: #58a6ff; word-break: break-all; }
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.dot {
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display: inline-block; width: 0.9vw; height: 0.9vw; border-radius: 50%;
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background: #f85149; margin-right: 0.6vw; vertical-align: middle;
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animation: pulse 2s ease-in-out infinite;
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}
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@keyframes pulse { 0%, 100% { opacity: 1 } 50% { opacity: 0.25 } }
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.meta { margin-top: 3vh; font-size: 1.1vw; color: #6e7681; }
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</style>
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</head>
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<body>
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<div class="card">
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<h1><span class="dot"></span>Can't reach the server</h1>
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<p>This display is working. It cannot currently reach</p>
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<p class="server" id="server">its ScreenTinker server</p>
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<p id="status">Retrying…</p>
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<p class="meta" id="meta"></p>
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</div>
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<script>
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/*
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* The local fallback page. autorun.brs loads this after three failed attempts at the real player,
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* so the screen says something truthful instead of showing white until someone visits the site.
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*
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* Two jobs, and nothing else:
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* 1. Say what is wrong, and name the server, so whoever walks past can act on it.
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* 2. Keep testing, and hand control back the moment the server answers.
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*
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* It asks the HOST to restart the widget rather than navigating itself — same reason the player
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* never calls location.reload() on this platform: an in-page navigation is not reliably a restart
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* an roHtmlWidget comes back from.
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*/
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(function () {
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'use strict';
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function qs(name) {
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var m = new RegExp('[?&]' + name + '=([^&]*)').exec(location.search || '');
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return m ? decodeURIComponent(m[1]) : null;
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}
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var server = qs('server') || '';
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var attempt = 0;
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var startedAt = Date.now();
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if (server) document.getElementById('server').textContent = server;
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var port = null;
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try {
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if (typeof require === 'function') {
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var MessagePortClass = require('@brightsign/messageport');
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port = new MessagePortClass();
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}
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} catch (e) { port = null; }
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function setStatus(text) { document.getElementById('status').textContent = text; }
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function setMeta(text) { document.getElementById('meta').textContent = text; }
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function minutesDown() {
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var m = Math.floor((Date.now() - startedAt) / 60000);
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return m < 1 ? 'less than a minute' : (m === 1 ? '1 minute' : m + ' minutes');
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}
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function probe() {
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attempt++;
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if (!server) { setStatus('No server configured on this card.'); return; }
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setStatus('Retrying… (attempt ' + attempt + ')');
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// cache-bust: a stale 200 from the widget cache would send us back to a server that is still
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// down, and the host would bounce straight back here — a loop that looks like flickering.
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var url = server.replace(/\/+$/, '') + '/api/status?probe=' + Date.now();
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fetch(url, { cache: 'no-store' })
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.then(function (r) {
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if (!r.ok) throw new Error('HTTP ' + r.status);
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setStatus('Server is back — restarting the player…');
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if (port && typeof port.PostBSMessage === 'function') {
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port.PostBSMessage({ type: 'restart', reason: 'server reachable again' });
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} else {
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// No host bridge (widget without node integration). Navigating is second best, but
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// doing nothing would strand the panel here forever.
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location.href = server;
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}
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})
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.catch(function (err) {
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setMeta('Offline for ' + minutesDown() + ' · last error: ' + (err && err.message ? err.message : 'unreachable'));
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schedule();
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});
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}
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// Backoff, capped. A panel that has been down for hours must not hammer a server that is
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// coming back up — every player on the site would hit it at once.
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function schedule() {
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var delay = attempt < 3 ? 5000 : (attempt < 10 ? 15000 : 60000);
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setTimeout(probe, delay);
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}
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probe();
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})();
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</script>
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</body>
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</html>
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