Claude: WebRTC Versuch

server.js

@@ -1,85 +1,72 @@
 'use strict';
 
 const express = require('express');
-const http = require('http');
-const { WebSocketServer } = require('ws');
-const path = require('path');
-const { detectDevices } = require('./src/deviceDetect');
-const { VideoStream } = require('./src/videoStream');
+const http    = require('http');
+const path    = require('path');
 const { createSnapshotRouter } = require('./src/snapshotService');
 
-const PORT = parseInt(process.env.PORT ?? '8080', 10);
+const PORT       = parseInt(process.env.PORT        ?? '8444', 10);
+const GO2RTC_URL = process.env.GO2RTC_URL ?? 'http://localhost:1984';
 
-function buildStreams() {
-  const devices = detectDevices();
-  console.log(`Detected ${devices.length} camera(s):`, devices);
+const app = express();
 
-  return devices.map((device, idx) => new VideoStream(device, {
-    name: `cam${idx}`,
-    width:   parseInt(process.env[`CAM${idx}_WIDTH`]   ?? '640',  10),
-    height:  parseInt(process.env[`CAM${idx}_HEIGHT`]  ?? '480',  10),
-    fps:     parseInt(process.env[`CAM${idx}_FPS`]     ?? '30',   10),
-    quality: parseInt(process.env[`CAM${idx}_QUALITY`] ?? '5',    10),
-  }));
-}
+app.use(express.static(path.join(__dirname, 'public')));
+app.use('/api/snapshot', createSnapshotRouter(GO2RTC_URL));
 
-function main() {
-  const streams = buildStreams();
+// ── WebRTC signaling proxy ────────────────────────────────────────────────────
+// Browser postet SDP-Offer hierher; wir leiten es an go2rtc weiter und
+// geben die SDP-Answer zurück. Nur ein HTTP-Port nach aussen nötig.
+app.post(
+  '/api/webrtc',
+  express.text({ type: 'application/sdp', limit: '64kb' }),
+  async (req, res) => {
+    const src = req.query.src ?? '';
+    try {
+      const upstream = await fetch(
+        `${GO2RTC_URL}/api/webrtc?src=${encodeURIComponent(src)}`,
+        {
+          method:  'POST',
+          headers: { 'Content-Type': 'application/sdp' },
+          body:    req.body,
+        }
+      );
+      if (!upstream.ok) {
+        const msg = await upstream.text();
+        return res.status(upstream.status).send(msg);
+      }
+      const answer = await upstream.text();
+      res.set('Content-Type', 'application/sdp');
+      res.send(answer);
+    } catch (err) {
+      res.status(503).json({ error: `go2rtc nicht erreichbar: ${err.message}` });
+    }
+  }
+);
 
-  // Start all streams eagerly – first client gets immediate frame
-  streams.forEach(s => s.start());
+// ── Health ────────────────────────────────────────────────────────────────────
+app.get('/health', async (_req, res) => {
+  let go2rtcOk = false;
+  try {
+    const r = await fetch(`${GO2RTC_URL}/api/streams`);
+    go2rtcOk = r.ok;
+  } catch { /* not reachable */ }
 
-  const app = express();
+  res.json({ status: go2rtcOk ? 'ok' : 'degraded', go2rtc: go2rtcOk });
+});
 
-  app.use(express.static(path.join(__dirname, 'public')));
-  app.use('/api/snapshot', createSnapshotRouter(streams));
+// ── Start ─────────────────────────────────────────────────────────────────────
+const server = http.createServer(app);
 
-  app.get('/health', (_req, res) => {
-    res.json({
-      status: 'ok',
-      cameras: streams.map((s, i) => ({
-        id: `cam${i}`,
-        device: s.device,
-        running: s.isRunning,
-        clients: s.clientCount,
-        hasFrame: s.latestFrame !== null,
-      })),
-    });
-  });
+server.listen(PORT, '0.0.0.0', () => {
+  console.log(`AppRobotWebcam on http://0.0.0.0:${PORT}`);
+  console.log(`  go2rtc backend: ${GO2RTC_URL}`);
+  console.log(`  WebRTC signaling proxy: POST /api/webrtc?src=cam0`);
+  console.log(`  Snapshot API:           GET  /api/snapshot/cam0`);
+});
 
-  const server = http.createServer(app);
-  const wss = new WebSocketServer({ noServer: true });
-
-  server.on('upgrade', (req, socket, head) => {
-    const match = req.url?.match(/^\/ws\/cam(\d+)$/);
-    if (!match) { socket.destroy(); return; }
-
-    const idx = parseInt(match[1], 10);
-    if (!streams[idx]) { socket.destroy(); return; }
-
-    wss.handleUpgrade(req, socket, head, (ws) => {
-      const stream = streams[idx];
-      stream.addClient(ws);
-      ws.on('close', () => stream.removeClient(ws));
-      ws.on('error', () => stream.removeClient(ws));
-    });
-  });
-
-  server.listen(PORT, '0.0.0.0', () => {
-    console.log(`AppRobotWebcam on http://0.0.0.0:${PORT}`);
-    streams.forEach((s, i) => {
-      console.log(`  ws://0.0.0.0:${PORT}/ws/cam${i}  →  ${s.device}`);
-      console.log(`  http://0.0.0.0:${PORT}/api/snapshot/cam${i}`);
-    });
-  });
-
-  const shutdown = (signal) => {
-    console.log(`\n${signal} received – shutting down`);
-    streams.forEach(s => s.stop());
-    server.close(() => process.exit(0));
-  };
-  process.on('SIGINT',  () => shutdown('SIGINT'));
-  process.on('SIGTERM', () => shutdown('SIGTERM'));
-}
-
-main();
+const shutdown = (sig) => {
+  console.log(`\n${sig} – shutting down`);
+  server.close(() => process.exit(0));
+};
+process.on('SIGINT',  () => shutdown('SIGINT'));
+process.on('SIGTERM', () => shutdown('SIGTERM'));