Button Foto

server/server.js

@@ -1,10 +1,12 @@
 import express from 'express';
 import https from 'https';
+import { Readable } from 'node:stream';
 import path from 'path';
 import fs from 'fs';
 import fsPromises from 'fs/promises';
 import { fileURLToPath } from 'url';
 import process from 'process';
+import { WebcamClient } from './webcamClient.js';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
@@ -27,6 +29,53 @@ app.get('/api/health', (req, res) => {
   res.json({ ok: true, mode: 'backend-proxy', webcamUrl: WEBCAM_URL || null, bodyTrackerUrl: BODYTRACKER_URL || null });
 });
 
+// ── WebCam-Proxy ─────────────────────────────────────────────────────────────
+
+/** Kameraliste mit Metadaten (inkl. calibrationUrl falls Kalibrierung vorhanden). */
+app.get('/api/webcam/cameras', async (req, res) => {
+  if (!WEBCAM_URL) return res.status(501).json({ error: 'WEBCAM_URL ist nicht konfiguriert' });
+  try {
+    const wc = new WebcamClient(WEBCAM_URL);
+    const data = await wc.getCameras();
+    return res.json(data);
+  } catch (err) {
+    console.error('webcam/cameras error:', err);
+    return res.status(502).json({ error: 'WebCam-Fehler', details: String(err) });
+  }
+});
+
+/**
+ * HD-JPEG einer Kamera (per Default hires).
+ * Streamt die JPEG-Antwort direkt durch — kein Buffering im Backend.
+ * Query-Parameter: ?hires=false für Live-Auflösung.
+ */
+app.get('/api/webcam/snapshot/:id', async (req, res) => {
+  if (!WEBCAM_URL) return res.status(501).json({ error: 'WEBCAM_URL ist nicht konfiguriert' });
+  const hires = req.query.hires !== 'false';
+  try {
+    const wc = new WebcamClient(WEBCAM_URL);
+    const upstream = await wc.getSnapshot(req.params.id, hires);
+
+    // Relevante Response-Header durchreichen
+    res.setHeader('Content-Type', upstream.headers.get('content-type') || 'image/jpeg');
+    res.setHeader('Cache-Control', 'no-store');
+    for (const header of ['x-camera-id', 'x-frame-width', 'x-timestamp', 'content-length']) {
+      const val = upstream.headers.get(header);
+      if (val) res.setHeader(header, val);
+    }
+
+    const nodeStream = Readable.fromWeb(upstream.body);
+    nodeStream.on('error', (err) => {
+      console.error(`webcam/snapshot/${req.params.id} stream error:`, err);
+      if (!res.headersSent) res.status(502).json({ error: 'Stream-Fehler' });
+    });
+    nodeStream.pipe(res);
+  } catch (err) {
+    console.error(`webcam/snapshot/${req.params.id} error:`, err);
+    if (!res.headersSent) res.status(502).json({ error: 'WebCam-Fehler', details: String(err) });
+  }
+});
+
 async function findLatestSnapshotFile() {
   const files = await fsPromises.readdir(snapshotsDir);
   const entries = await Promise.all(