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Server side of the inverted capture path. The host half is not here — see the end of this message. Every other player is TOLD to capture: the server emits device:screenshot-request over the device socket and the page photographs itself. A BrightSign cannot photograph itself. Video decodes onto a hardware plane the DOM cannot read, so an in-page canvas returns a frame with the content missing — which is why that platform has been answering screenshot requests with a card explaining that the video is uncapturable. Only the host, through the player's own DWS, can get a real frame. The obvious way to ask the host is through the page, and it does not work. On an XT245 (BOS 9.1.93.2) page->host messaging is dead after load: instrumenting the host to echo the `reason` of EVERY roHtmlWidgetEvent produced nothing at all while the page was posting, though the boot-time probe round-trips. The registry is not an alternative either — a running BrightScript does not observe registry writes made by anyone else, proven by writing the key externally through the DWS and watching the host ignore it. What the host CAN do is HTTP; it already fetches its own package updates that way. So the direction is inverted: the request waits here and the host collects it. The image comes back over a plain POST, which means a capture will work even when the page is wedged — exactly when an operator most wants to see the screen. Held in memory on purpose. A capture request is worthless a minute after it was made — someone clicked a button and is watching for the result — so persisting it would only add a way to deliver a stale screenshot after a restart. Bounded and TTL'd so a fleet going offline mid-request cannot grow it, and a repeat request REPLACES rather than queues so a 1fps stream builds no backlog. Authenticated with the same device_id + device_token pair the socket uses. /api/brightsign/package is public because a player fetches it before it has any identity; a screenshot is a picture of a customer's screen and belongs to one display. deviceSocket now exposes ONE ingestScreenshot() used by both the socket handler and the HTTP route, so a BrightSign screenshot reaches the dashboard by exactly the route every other player's does rather than becoming a second, subtly different feature. Note those exports must be attached AFTER `module.exports = function setupDeviceSocket`, which reassigns the object — attaching above it silently wipes them, which cost a debugging round. NOT INCLUDED, deliberately: the host-side poll. Adding it to autorun.brs's main loop kills the BrightScript script within seconds of boot — the page keeps playing, because the widget outlives the script, so from the dashboard it looks healthy. Cause unidentified; BrightScript runtime faults do not reach /api/v1/logs, so there is no error text to read. Half a feature that silently takes down the host is worse than none, so the server waits for a host that can safely ask. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014skWYXJUWhF73EvNPgB2AS |
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| dashboardSocket.js | ||
| deviceSocket.js | ||
| index.js | ||