Server-side printing, roll type setting, cache headers

package.json

@@ -7,6 +7,7 @@
   "scripts": {
     "start": "node src/server.js",
     "dev": "node --watch src/server.js",
+    "version": "node scripts/version.mjs",
     "gen-secret": "node -e \"console.log(require('crypto').randomBytes(32).toString('hex'))\""
   },
   "engines": {

scripts/version.mjs

@@ -0,0 +1,32 @@
+// Reports what this container is actually running, so an upgrade that did not
+// land can be spotted without guesswork.
+import fs from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const here = path.dirname(fileURLToPath(import.meta.url));
+const root = path.join(here, '..');
+
+const FEATURES = [
+  ['server-side printing', 'src/printer.js', null],
+  ['roll type is a separate setting', 'src/routes/admin.js', 'printer_label'],
+  ['roll type in the console', 'public/js/admin.js', 'printerLabel'],
+  ['company field', 'src/routes/kiosk.js', 'company'],
+  ['separate login page', 'public/login.html', 'step-password'],
+  ['per-site branding', 'src/branding.js', null],
+  ['CA in DER form for Jamf', 'src/tls.js', 'caCertificateDer'],
+];
+
+console.log('');
+for (const [name, file, needle] of FEATURES) {
+  const full = path.join(root, file);
+  let state = 'MISSING';
+  if (fs.existsSync(full)) {
+    state = !needle || fs.readFileSync(full, 'utf8').includes(needle) ? 'present' : 'OLD VERSION';
+  }
+  console.log(`  ${state.padEnd(12)} ${name}`);
+}
+console.log('');
+console.log('Anything not "present" means this container is running older code.');
+console.log('On the docker host:  git pull && docker compose up -d --build');
+console.log('');

src/server.js

@@ -72,7 +72,19 @@ app.get('/admin/login', (req, res) => {
 // Nobody should land on the raw filenames; keep one address per page.
 app.get(['/admin.html', '/login.html'], (req, res) => res.redirect('/admin'));
 
-app.use(express.static(publicDir, { extensions: ['html'], index: false }));
+// no-cache still allows a 304 on an unchanged file, but forces the browser to ask
+// first. Without it a cached admin.js survives an upgrade and the console keeps
+// running yesterday's code against today's server, which is impossible to diagnose
+// from the outside.
+app.use(
+  express.static(publicDir, {
+    extensions: ['html'],
+    index: false,
+    setHeaders: (res, filePath) => {
+      if (/\.(html|js|css)$/.test(filePath)) res.setHeader('Cache-Control', 'no-cache');
+    },
+  })
+);
 app.get('/favicon.ico', (req, res) => res.redirect(301, '/favicon.svg'));
 app.use((req, res) => res.status(404).sendFile(path.join(publicDir, 'index.html')));