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BigBodyCobain
5e0b2c037e
On 2026-05-23, stream.aisstream.io went fully offline (TCP timeouts on port
443). The backend kept respawning the node WebSocket proxy every few
seconds with nothing arriving. From the operator's POV the ships layer
silently went empty — no banner, no log surfacing, no way to tell whether
it was their config / network / viewport filter / upstream.
Backend:
* ais_proxy_status() now also returns:
- connected (bool): true when a vessel message arrived in last 60s
- last_msg_age_seconds (int | None)
- proxy_spawn_count (int): proxy respawns — sustained growth without
connected means upstream is dead
* /api/health escalates top status to "degraded" when AIS_API_KEY is set
but the proxy is currently disconnected. Existing degraded_tls signal
preserved.
Frontend:
* useAisUpstreamHealth hook polls /api/health every 30s, derives the
outage state. Defensively only reports outage once spawn_count > 0 so
operators who haven't opted in don't see the banner.
* AisUpstreamBanner component renders a dismissible amber notice
"Ship data temporarily unavailable — AISStream upstream is offline"
mounted on the main app shell.
7 backend tests pin the status-shape contract and the /api/health
escalation behavior in both with-key and without-key configurations.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
ShadowBroker Frontend
Next.js 16 dashboard with MapLibre GL, Cesium, and Framer Motion.
Development
npm install
npm run dev # http://localhost:3000
API URL Configuration
The frontend needs to reach the backend (default port 8000). Resolution order:
NEXT_PUBLIC_API_URLenv var — if set, used as-is (build-time, baked by Next.js)- Server-side (SSR) — falls back to
http://localhost:8000 - Client-side (browser) — auto-detects using
window.location.hostname:8000
Common scenarios
| Scenario | Action needed |
|---|---|
Local dev (localhost:3000 + localhost:8000) |
None — auto-detected |
LAN access (192.168.x.x:3000) |
None — auto-detected from browser hostname |
| Public deploy (same host, port 8000) | None — auto-detected |
Backend on different port (e.g. 9096) |
Set NEXT_PUBLIC_API_URL=http://host:9096 before build |
| Backend on different host | Set NEXT_PUBLIC_API_URL=http://backend-host:8000 before build |
Behind reverse proxy (e.g. /api path) |
Set NEXT_PUBLIC_API_URL=https://yourdomain.com before build |
Setting the variable
# Shell (Linux/macOS)
NEXT_PUBLIC_API_URL=http://myserver:8000 npm run build
# PowerShell (Windows)
$env:NEXT_PUBLIC_API_URL="http://myserver:8000"; npm run build
# Docker Compose (set in .env file next to docker-compose.yml)
NEXT_PUBLIC_API_URL=http://myserver:8000
Note: This is a build-time variable. Changing it requires rebuilding the frontend.
Theming
Dark mode is the default. A light/dark toggle is available in the left panel toolbar.
Theme preference is persisted in localStorage as sb-theme and applied via
data-theme attribute on <html>. CSS variables in globals.css define all
structural colors for both themes.