basic camera functionality as well as framework for express nodejs backend

api/app.js

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+
+import cookieParser from 'cookie-parser';
+import express from 'express';
+import createError from 'http-errors';
+import logger from 'morgan';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+import indexRouter from './routes/index.js';
+import usersRouter from './routes/users.js';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const app = express();
+
+// view engine setup
+app.set('views', path.join(__dirname, 'views'));
+app.set('view engine', 'jade');
+
+app.use(logger('dev'));
+app.use(express.json());
+app.use(express.urlencoded({ extended: false }));
+app.use(cookieParser());
+app.use(express.static(path.join(__dirname, 'public')));
+
+app.use('/', indexRouter);
+app.use('/users', usersRouter);
+
+// catch 404 and forward to error handler
+app.use(function(req, res, next) {
+  next(createError(404));
+});
+
+// error handler
+app.use(function(err, req, res, next) {
+  // set locals, only providing error in development
+  res.locals.message = err.message;
+  res.locals.error = req.app.get('env') === 'development' ? err : {};
+
+  // render the error page
+  res.status(err.status || 500);
+  res.render('error');
+});
+
+export default app;

api/bin/www

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+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+
+import debugLib from 'debug';
+import http from 'http';
+import app from '../app.js';
+const debug = debugLib('api:server');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+
+const port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+
+const server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+
+function normalizePort(val) {
+  const port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  const bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+
+function onListening() {
+  const addr = server.address();
+  const bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}

api/package.json

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+{
+  "name": "api",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./bin/www"
+  },
+  "dependencies": {
+    "cookie-parser": "~1.4.4",
+    "debug": "~2.6.9",
+    "express": "~4.16.1",
+    "http-errors": "~1.6.3",
+    "jade": "~1.11.0",
+    "morgan": "~1.9.1"
+  }
+}

api/public/stylesheets/style.css

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+body {
+  padding: 50px;
+  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
+}
+
+a {
+  color: #00B7FF;
+}

api/routes/index.js

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+
+import express from 'express';
+const router = express.Router();
+
+/* GET home page. */
+router.get('/', function(req, res, next) {
+  res.send('index');
+});
+
+export default router;

api/routes/users.js

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+
+import express from 'express';
+const router = express.Router();
+
+/* GET users listing. */
+router.get('/', function(req, res, next) {
+  res.send('respond with a resource');
+});
+
+export default router;

api/views/error.jade

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+extends layout
+
+block content
+  h1= message
+  h2= error.status
+  pre #{error.stack}

api/views/index.jade

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+extends layout
+
+block content
+  h1= title
+  p Welcome to #{title}

api/views/layout.jade

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+doctype html
+html
+  head
+    title= title
+    link(rel='stylesheet', href='/stylesheets/style.css')
+  body
+    block content