ProdCom 1.3.0: one connection to ProdCom, shared by every dashboard
The module used to proxy each browser's transcript stream to ProdCom one to one, so N screens meant N upstream connections and N history reads. It now follows ProdCom once: it keeps the channel list, the groups and the last 300 entries, and gives every browser a snapshot on connect (`state`) plus each changed entry as it happens (`entry`), with `clear` and `status` frames as the link changes. Reconnects back off from 2 s to 15 s, re-read the lists and history, and re-send the snapshot. The tile no longer loads anything itself; the admin readout says how many channels and entries the server holds. The /prodcom/* proxy is gone. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This commit is contained in:
Waters Church
co-authored by
Claude Fable 5.1
Claude Fable 5.1
parent
ec178e9ccd
commit
96eff1a5c5
@@ -15,9 +15,10 @@ touching the shell (see [docs/MODULE-GUIDE.md](docs/MODULE-GUIDE.md)).
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2. Discovers modules in `modules/` and serves each one's client at
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`/modules/<id>/`.
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3. Mounts each enabled module's server routes under `/api/modules/<id>/` —
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that's where module servers proxy ProdCom, poll ProPresenter, and stream
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live updates over SSE, so browsers never talk to production gear
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directly (no CORS, and API keys never leave the server).
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that's where module servers follow ProdCom, poll ProPresenter, and stream
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live updates over SSE — one upstream connection per module, however many
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dashboards are open — so browsers never talk to production gear directly
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(no CORS, and API keys never leave the server).
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4. Stores server-wide module config and named layouts in a per-machine data
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directory outside the app folder, so updating ProdDash never loses them.
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@@ -3,8 +3,9 @@
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Ported from prodcom-listener/public/app.js into the ProdDash module
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contract: everything lives inside the tile's root, per-tile state
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(hidden channels, channel icons, timestamps, text size, flow direction)
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persists in instance settings, and all network traffic goes through
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moduleApi (the module's server proxy at /prodcom/*). */
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persists in instance settings, and the data comes from the module's own
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server, which keeps one connection to ProdCom for every dashboard: a
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snapshot on connect (`state`), then each changed entry (`entry`). */
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/* the text-size buttons: a drawn − and + at the icon size, like every other header icon */
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const MINUS_SVG = '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.4" stroke-linecap="round" aria-hidden="true"><path d="M5 12h14"/></svg>';
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@@ -19,7 +20,6 @@ export default function create({ root, moduleApi }) {
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let pinnedToLatest = true;
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let hiddenChannels = new Set(moduleApi.instanceSettings.hiddenChannels || []);
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let stream = null; // moduleApi.sse handle
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let bootTimer = null;
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let stopped = false;
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/* ── DOM skeleton ───────────────────────────────────────────────── */
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@@ -353,120 +353,68 @@ export default function create({ root, moduleApi }) {
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/* The stream sends JSON objects for new/updated/completed transcript
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entries. Be liberal about the envelope shape. */
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function extractEntries(obj) {
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if (!obj || typeof obj !== 'object') return [];
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if (Array.isArray(obj)) return obj.flatMap(extractEntries);
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if (typeof obj.text === 'string' && (obj.id || obj.channelId)) return [obj];
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for (const key of ['data', 'payload', 'entry', 'entries', 'transcript']) {
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if (obj[key] && typeof obj[key] === 'object') {
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const found = extractEntries(obj[key]);
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if (found.length) return found;
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}
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}
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return [];
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/* ── the module's feed: one snapshot, then each change ─────────── */
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function applyStatus(st) {
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if (!st || typeof st !== 'object') return;
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if (st.state === 'ok') moduleApi.setStatus('ok', st.message || 'Live');
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else moduleApi.setStatus(st.state === 'error' ? 'error' : 'connecting', st.message || 'Connecting to ProdCom…');
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}
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function handleEventData(raw) {
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let obj;
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try { obj = JSON.parse(raw); } catch { return; }
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const kind = String(obj.type || obj.event || '').toLowerCase();
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if (kind.includes('clear')) {
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entryEls.forEach((el) => el.remove());
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entryEls.clear();
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emptyEl.hidden = false;
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return;
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}
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extractEntries(obj).forEach(upsertEntry);
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}
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/* ── data loading (all via the module's proxy) ──────────────────── */
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async function loadChannels() {
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const res = await moduleApi.fetch('/prodcom/api/v1/channels');
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if (!res.ok) throw new Error('channels ' + res.status);
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const body = await res.json();
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function applySnapshot(snap) {
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if (!snap || typeof snap !== 'object') return;
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channels.clear();
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for (const ch of body.data || []) {
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channels.set(ch.id, { name: ch.name, color: ch.color || '#8b98a5' });
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}
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rebuildChannelMenu();
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}
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async function loadGroups() {
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const res = await moduleApi.fetch('/prodcom/api/v1/groups');
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if (!res.ok) throw new Error('groups ' + res.status);
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const body = await res.json();
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for (const ch of snap.channels || []) channels.set(String(ch.id), { name: ch.name, color: ch.color || '#8b98a5' });
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groups.clear();
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for (const g of body.data || []) {
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groups.set(g.id, { name: g.name, channelIds: g.channelIds || [] });
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}
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for (const g of snap.groups || []) groups.set(String(g.id), { name: g.name, channelIds: g.channelIds || [] });
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rebuildChannelMenu();
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const list = (snap.entries || []).slice().sort((a, b) => new Date(a.date) - new Date(b.date));
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list.forEach(upsertEntry); // dedupes by id, so a snapshot after a reconnect is harmless
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applyStatus(snap.status);
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}
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async function loadHistory() {
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const res = await moduleApi.fetch('/prodcom/api/v1/transcript?limit=100');
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if (!res.ok) throw new Error('transcript ' + res.status);
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const body = await res.json();
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const entries = (body.data || []).slice();
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entries.sort((a, b) => new Date(a.date) - new Date(b.date));
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entries.forEach(upsertEntry);
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async function loadState() {
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try {
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const res = await moduleApi.fetch('/state');
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if (!res.ok) throw new Error(String(res.status));
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applySnapshot(await res.json());
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} catch { /* the stream's own snapshot covers it */ }
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}
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/* ── live stream ────────────────────────────────────────────────── */
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const SSE_EVENT_NAMES = [
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'transcript', 'transcript.new', 'transcript.updated', 'transcript.update',
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'transcript.completed', 'transcript.complete', 'entry', 'new', 'update',
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'updated', 'complete', 'completed',
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];
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function connect() {
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const onEvent = (ev) => handleEventData(ev.data);
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const events = {};
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for (const name of SSE_EVENT_NAMES) events[name] = onEvent;
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stream = moduleApi.sse('/prodcom/api/v1/transcript/stream', {
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stream = moduleApi.sse('/stream', {
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open() {
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moduleApi.setStatus('ok', 'Live');
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// refresh channels/groups and backfill entries missed while
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// disconnected (upsertEntry dedupes by id, so this is harmless)
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loadChannels().catch(() => {});
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loadGroups().catch(() => {});
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loadHistory().catch(() => {});
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loadState(); // a late joiner, or a reconnect: catch up on what was missed
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},
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error() {
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moduleApi.setStatus('error', 'ProdCom unreachable — reconnecting…');
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moduleApi.setStatus('error', 'ProdDash ProdCom module unreachable — reconnecting…');
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},
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events: {
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state(ev) {
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try { applySnapshot(JSON.parse(ev.data)); } catch { /* a bad frame is skipped */ }
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},
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entry(ev) {
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try { upsertEntry(JSON.parse(ev.data)); } catch { /* skipped */ }
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},
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clear() {
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clearView();
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},
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status(ev) {
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try { applyStatus(JSON.parse(ev.data)); } catch { /* skipped */ }
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},
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},
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message: onEvent,
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events,
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});
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}
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/* ── lifecycle ──────────────────────────────────────────────────── */
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async function boot() {
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if (stopped) return;
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moduleApi.setStatus('connecting', 'Connecting to ProdCom…');
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try {
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await loadChannels();
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await loadGroups().catch(() => {}); // groups are optional
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await loadHistory();
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} catch {
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moduleApi.setStatus('error', 'ProdCom unreachable — retrying…');
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bootTimer = setTimeout(boot, 5000);
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return;
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}
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scrollToLatest();
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connect();
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}
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return {
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start() {
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boot();
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moduleApi.setStatus('connecting', 'Connecting to ProdCom…');
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connect();
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},
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stop() {
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stopped = true;
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clearTimeout(bootTimer);
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stream?.close();
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root.innerHTML = ''; // header controls are removed by the shell
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},
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@@ -1,9 +1,9 @@
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{
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"id": "prodcom-transcript",
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"name": "ProdCom",
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"version": "1.2.2",
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"version": "1.3.0",
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"proddash": ">=1.1.0",
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"description": "Live ProdCom transcript stream",
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"description": "Live ProdCom transcript",
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"permissions": [
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{
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"kind": "local-network",
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@@ -3,73 +3,34 @@
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/**
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* ProdCom Transcript — server part.
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*
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* One wildcard route that proxies /prodcom/* (including the SSE transcript
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* stream) to the ProdCom API configured in the admin page, so browsers never
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* talk to ProdCom directly (no CORS, and the API key never reaches clients).
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* Ported from prodcom-listener/server.js.
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* One connection to ProdCom for the whole server, however many dashboards
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* show the transcript. The module holds the channel list, the groups and
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* the last entries, follows ProdCom's SSE stream, and hands every browser a
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* snapshot on connect plus each change as it happens. (It used to proxy each
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* browser's stream to ProdCom one to one — N screens meant N upstream
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* connections; ProdCom now sees one.)
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*
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* Routes (under /api/modules/prodcom-transcript):
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* GET /state → { status, channels, groups, entries } (entries by date)
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* GET /stream → SSE: `state` (the snapshot, first), then `entry` for each
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* changed entry, `clear`, and `status` when the link changes
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*
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* ProdCom's API, as the reference listener speaks it:
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* GET /api/v1/channels, /api/v1/groups, /api/v1/transcript?limit=N and the
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* SSE /api/v1/transcript/stream, whose frames carry an entry, or a
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* { type, entry | data } wrapper, in a few historical shapes (see
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* extractEntries). A bearer API key is sent when one is configured.
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*/
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const http = require('http');
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// Hop-by-hop headers that must not be forwarded
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const HOP_HEADERS = new Set([
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'connection', 'keep-alive', 'proxy-authenticate', 'proxy-authorization',
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'te', 'trailer', 'transfer-encoding', 'upgrade',
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]);
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/** Health shown in the admin page: outcome of the most recent proxied request. */
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let health = { status: 'connecting', message: 'No traffic yet' };
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function proxy(req, res, target, apiKey) {
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const upstreamPath = (req.wildcard || '/') + (req.search || '');
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const headers = {};
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for (const [k, v] of Object.entries(req.headers)) {
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if (!HOP_HEADERS.has(k.toLowerCase())) headers[k] = v;
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}
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headers.host = target.host;
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delete headers['accept-encoding']; // keep SSE unbuffered and simple
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if (apiKey) headers.authorization = 'Bearer ' + apiKey;
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const preq = http.request(
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{
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hostname: target.hostname,
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port: target.port || 80,
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path: upstreamPath,
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method: req.method,
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headers,
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},
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(pres) => {
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health = { status: 'ok', message: `ProdCom reachable (last: HTTP ${pres.statusCode})` };
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const outHeaders = {};
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for (const [k, v] of Object.entries(pres.headers)) {
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if (!HOP_HEADERS.has(k.toLowerCase())) outHeaders[k] = v;
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}
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res.writeHead(pres.statusCode, outHeaders);
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// Flush immediately — SSE streams may send no bytes for a while, and
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// the browser needs the headers to consider the stream open.
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res.flushHeaders();
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pres.pipe(res);
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// If ProdCom dies mid-stream, pipe() unpipes on error without ending
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// the browser's response, leaving SSE clients hanging on a dead
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// stream. Destroy it so they notice immediately and reconnect.
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pres.on('close', () => {
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if (!res.writableEnded) res.destroy();
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});
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}
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);
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preq.on('error', (e) => {
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health = { status: 'error', message: 'ProdCom unreachable: ' + (e.code || String(e)) };
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if (!res.headersSent) {
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res.writeHead(502, { 'Content-Type': 'application/json' });
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}
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res.end(JSON.stringify({ error: 'ProdCom unreachable', detail: e.code || String(e) }));
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});
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// Tear down the upstream connection when the browser disconnects
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res.on('close', () => preq.destroy());
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req.pipe(preq);
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}
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const HISTORY_LIMIT = 100; // entries asked for on (re)connect
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const ENTRIES_MAX = 300; // entries kept in memory
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const RETRY_MIN_MS = 2000;
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const RETRY_MAX_MS = 15000;
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const REQUEST_TIMEOUT_MS = 8000;
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const REFRESH_LISTS_MS = 5 * 60 * 1000; // channels and groups re-read
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const HEARTBEAT_MS = 15000;
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/** The ProdCom base URL from the endpoint config. A legacy prodcomUrl (saved
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before the endpoint field existed) can only still be present until the
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@@ -82,23 +43,281 @@ function resolveTarget(config) {
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return null;
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}
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module.exports = {
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init({ config }) {
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health = resolveTarget(config)
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? { status: 'connecting', message: 'No traffic yet' }
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: { status: 'error', message: 'No ProdCom server configured' };
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/** Entries inside whatever ProdCom sent: a bare entry, or one wrapped in data / payload / entry / entries / transcript. */
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function extractEntries(obj) {
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if (!obj || typeof obj !== 'object') return [];
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if (Array.isArray(obj)) return obj.flatMap(extractEntries);
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if (typeof obj.text === 'string' && (obj.id || obj.channelId)) return [obj];
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for (const key of ['data', 'payload', 'entry', 'entries', 'transcript']) {
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if (obj[key] && typeof obj[key] === 'object') {
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const found = extractEntries(obj[key]);
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if (found.length) return found;
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}
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}
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return [];
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}
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/** One entry as the tiles read it; an entry without an id is keyed by channel and time. */
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function normalizeEntry(e) {
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const id = e.id !== undefined && e.id !== null && e.id !== '' ? String(e.id) : `${e.channelId || ''}|${e.date || ''}`;
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return {
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stop() { /* nothing persistent to tear down — streams die with their sockets */ },
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health: () => health,
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id,
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channelId: e.channelId === undefined || e.channelId === null ? '' : String(e.channelId),
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channelName: e.channelName ? String(e.channelName) : '',
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text: String(e.text ?? ''),
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date: e.date ? String(e.date) : new Date().toISOString(),
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inProgress: Boolean(e.inProgress),
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};
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}
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let current = null; // the running instance, for routes()
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module.exports = {
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init({ config, log }) {
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const target = resolveTarget(config);
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const apiKey = String(config.apiKey || '');
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const channels = [];
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const groups = [];
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const entries = new Map(); // id → entry, in arrival order
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const streams = new Set(); // browsers' SSE responses
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let status = { state: 'connecting', message: target ? 'Connecting to ProdCom…' : 'No ProdCom server configured' };
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let stopped = false;
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let upstream = null;
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let generation = 0; // callbacks from a superseded connection are ignored
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let retryTimer = null;
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let retryMs = RETRY_MIN_MS;
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const authHeaders = () => (apiKey ? { authorization: `Bearer ${apiKey}` } : {});
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async function getJson(pathname) {
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const res = await fetch(new URL(pathname, target), {
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headers: { accept: 'application/json', ...authHeaders() },
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signal: AbortSignal.timeout(REQUEST_TIMEOUT_MS),
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});
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if (!res.ok) throw new Error(`HTTP ${res.status} for ${pathname}`);
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return res.json();
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}
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function sortedEntries() {
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return [...entries.values()].sort((a, b) => new Date(a.date) - new Date(b.date));
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}
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function snapshot() {
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return { status, channels, groups, entries: sortedEntries() };
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}
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function broadcast(event, data) {
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if (!streams.size) return;
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const frame = `event: ${event}\ndata: ${JSON.stringify(data)}\n\n`;
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for (const res of streams) {
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try {
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res.write(frame);
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} catch {
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streams.delete(res);
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}
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}
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}
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function setStatus(state, message) {
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if (status.state === state && status.message === message) return;
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status = { state, message };
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broadcast('status', status);
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}
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function trim() {
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while (entries.size > ENTRIES_MAX) entries.delete(entries.keys().next().value);
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}
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/** A changed entry: kept, and told to every browser. */
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function upsert(raw) {
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const e = normalizeEntry(raw);
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const prev = entries.get(e.id);
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if (prev && prev.text === e.text && prev.inProgress === e.inProgress && prev.channelId === e.channelId) return;
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entries.set(e.id, e);
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trim();
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broadcast('entry', e);
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}
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function clearAll() {
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entries.clear();
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broadcast('clear', {});
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}
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async function loadLists() {
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const [ch, gr] = await Promise.all([
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getJson('/api/v1/channels'),
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getJson('/api/v1/groups').catch(() => ({ data: [] })), // groups are optional in ProdCom
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]);
|
||||
channels.splice(0, channels.length, ...(ch.data || []).map((c) => ({ id: String(c.id), name: String(c.name || c.id), color: c.color || '#8b98a5' })));
|
||||
groups.splice(0, groups.length, ...(gr.data || []).map((g) => ({ id: String(g.id), name: String(g.name || g.id), channelIds: Array.isArray(g.channelIds) ? g.channelIds.map(String) : [] })));
|
||||
}
|
||||
|
||||
async function loadHistory() {
|
||||
const body = await getJson(`/api/v1/transcript?limit=${HISTORY_LIMIT}`);
|
||||
for (const e of extractEntries(body).map(normalizeEntry)) entries.set(e.id, e);
|
||||
trim();
|
||||
}
|
||||
|
||||
function handleFrame(block) {
|
||||
const data = [];
|
||||
for (const line of block.split('\n')) {
|
||||
if (line.startsWith('data:')) data.push(line.slice(5).replace(/^ /, ''));
|
||||
}
|
||||
if (!data.length) return;
|
||||
let obj;
|
||||
try {
|
||||
obj = JSON.parse(data.join('\n'));
|
||||
} catch {
|
||||
return;
|
||||
}
|
||||
const kind = String(obj?.type || obj?.event || '').toLowerCase();
|
||||
if (kind.includes('clear')) return clearAll();
|
||||
extractEntries(obj).forEach(upsert);
|
||||
}
|
||||
|
||||
function scheduleRetry() {
|
||||
if (stopped) return;
|
||||
clearTimeout(retryTimer);
|
||||
retryTimer = setTimeout(connect, retryMs);
|
||||
retryMs = Math.min(RETRY_MAX_MS, retryMs * 2);
|
||||
}
|
||||
|
||||
function fail(gen, why) {
|
||||
if (stopped || gen !== generation) return;
|
||||
generation += 1; // whatever else this connection reports is stale now
|
||||
try { upstream?.destroy(); } catch { /* already gone */ }
|
||||
upstream = null;
|
||||
setStatus('error', `ProdCom unreachable (${why}) — retrying`);
|
||||
log(`ProdCom ${target.origin}: ${why} — retrying in ${retryMs / 1000} s`);
|
||||
scheduleRetry();
|
||||
}
|
||||
|
||||
/** Lists and history first (a fresh snapshot for the tiles), then the live stream. */
|
||||
async function connect() {
|
||||
if (stopped || !target) return;
|
||||
const gen = ++generation;
|
||||
try {
|
||||
await loadLists();
|
||||
await loadHistory();
|
||||
} catch (err) {
|
||||
if (gen !== generation || stopped) return;
|
||||
return fail(gen, err.cause?.code || err.code || err.message);
|
||||
}
|
||||
if (gen !== generation || stopped) return;
|
||||
broadcast('state', snapshot());
|
||||
const url = new URL('/api/v1/transcript/stream', target);
|
||||
const req = http.request({
|
||||
hostname: url.hostname,
|
||||
port: url.port || 80,
|
||||
path: url.pathname,
|
||||
method: 'GET',
|
||||
headers: { accept: 'text/event-stream', ...authHeaders() },
|
||||
}, (res) => {
|
||||
if (gen !== generation) return void res.destroy();
|
||||
if (res.statusCode !== 200) {
|
||||
res.resume();
|
||||
return fail(gen, `HTTP ${res.statusCode} from the transcript stream`);
|
||||
}
|
||||
retryMs = RETRY_MIN_MS;
|
||||
setStatus('ok', 'Live');
|
||||
log(`following ${target.origin} — ${channels.length} channels, ${entries.size} entries`);
|
||||
let buf = '';
|
||||
res.setEncoding('utf8');
|
||||
res.on('data', (chunk) => {
|
||||
if (gen !== generation) return;
|
||||
buf += chunk;
|
||||
let i;
|
||||
while ((i = buf.indexOf('\n\n')) >= 0) {
|
||||
handleFrame(buf.slice(0, i));
|
||||
buf = buf.slice(i + 2);
|
||||
}
|
||||
if (buf.length > 1e6) buf = ''; // a frame that never ends is dropped
|
||||
});
|
||||
res.on('end', () => fail(gen, 'stream ended'));
|
||||
res.on('error', (err) => fail(gen, err.code || err.message));
|
||||
});
|
||||
req.on('error', (err) => fail(gen, err.code || err.message));
|
||||
req.end();
|
||||
upstream = req;
|
||||
}
|
||||
|
||||
const listsTimer = setInterval(() => {
|
||||
if (stopped || status.state !== 'ok') return;
|
||||
loadLists().then(() => broadcast('state', snapshot())).catch(() => { /* the next reconnect re-reads them */ });
|
||||
}, REFRESH_LISTS_MS);
|
||||
listsTimer.unref?.();
|
||||
const heartbeat = setInterval(() => {
|
||||
for (const res of streams) {
|
||||
try {
|
||||
res.write(': ping\n\n');
|
||||
} catch {
|
||||
streams.delete(res);
|
||||
}
|
||||
}
|
||||
}, HEARTBEAT_MS);
|
||||
heartbeat.unref?.();
|
||||
|
||||
if (target) {
|
||||
log(`one connection to ProdCom at ${target.origin}, shared by every dashboard`);
|
||||
connect();
|
||||
} else {
|
||||
log('no ProdCom server configured — set the endpoint in /admin');
|
||||
}
|
||||
|
||||
current = {
|
||||
snapshot,
|
||||
streams,
|
||||
health() {
|
||||
if (status.state === 'ok') return { status: 'ok', message: `Live — ${channels.length} channel${channels.length === 1 ? '' : 's'}, ${entries.size} entries` };
|
||||
return { status: status.state === 'error' ? 'error' : 'connecting', message: status.message };
|
||||
},
|
||||
};
|
||||
|
||||
return {
|
||||
stop() {
|
||||
stopped = true;
|
||||
generation += 1;
|
||||
clearTimeout(retryTimer);
|
||||
clearInterval(listsTimer);
|
||||
clearInterval(heartbeat);
|
||||
try { upstream?.destroy(); } catch { /* already gone */ }
|
||||
for (const res of streams) {
|
||||
try { res.end(); } catch { /* gone */ }
|
||||
}
|
||||
streams.clear();
|
||||
if (current?.streams === streams) current = null;
|
||||
},
|
||||
health: () => (current ? current.health() : { status: 'connecting', message: 'Restarting…' }),
|
||||
};
|
||||
},
|
||||
|
||||
routes({ config, log }) {
|
||||
// An invalid host/URL throws here, which surfaces as a mount error in /admin.
|
||||
const target = resolveTarget(config) || new URL('http://10.3.11.152:24480');
|
||||
log(`proxying /prodcom/* → ${target.origin}`);
|
||||
routes() {
|
||||
const sendJson = (res, code, body) => {
|
||||
res.writeHead(code, { 'Content-Type': 'application/json; charset=utf-8', 'Cache-Control': 'no-store' });
|
||||
res.end(JSON.stringify(body));
|
||||
};
|
||||
return {
|
||||
'* /prodcom/*': (req, res) => proxy(req, res, target, config.apiKey || ''),
|
||||
'GET /state': (req, res) => {
|
||||
if (!current) return sendJson(res, 503, { error: 'ProdCom module is restarting — try again' });
|
||||
sendJson(res, 200, current.snapshot());
|
||||
},
|
||||
'GET /stream': (req, res) => {
|
||||
res.writeHead(200, {
|
||||
'Content-Type': 'text/event-stream; charset=utf-8',
|
||||
'Cache-Control': 'no-cache, no-transform',
|
||||
Connection: 'keep-alive',
|
||||
'X-Accel-Buffering': 'no',
|
||||
});
|
||||
res.write('retry: 3000\n\n');
|
||||
if (!current) {
|
||||
res.write(`event: state\ndata: ${JSON.stringify({ status: { state: 'connecting', message: 'ProdCom module is restarting…' }, channels: [], groups: [], entries: [] })}\n\n`);
|
||||
return void res.end();
|
||||
}
|
||||
res.write(`event: state\ndata: ${JSON.stringify(current.snapshot())}\n\n`);
|
||||
try { req.socket.setKeepAlive(true, 15000); } catch { /* gone */ }
|
||||
current.streams.add(res);
|
||||
req.on('close', () => current && current.streams.delete(res));
|
||||
},
|
||||
};
|
||||
},
|
||||
};
|
||||
|
||||
Reference in New Issue
Block a user