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app.js
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app.js
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'use strict';
const _get = require('lodash/get');
const express = require('express');
const compression = require('compression');
const bodyParser = require('body-parser');
const path = require('path');
const fs = require('fs');
const ejs = require('ejs');
function create (env, ctx) {
var app = express();
var appInfo = env.name + ' ' + env.version;
app.set('title', appInfo);
app.enable('trust proxy'); // Allows req.secure test on heroku https connections.
var insecureUseHttp = env.insecureUseHttp;
var secureHstsHeader = env.secureHstsHeader;
if (!insecureUseHttp) {
console.info('Redirecting http traffic to https because INSECURE_USE_HTTP=', insecureUseHttp);
app.use((req, res, next) => {
if (req.header('x-forwarded-proto') === 'https' || req.secure) {
next();
} else {
res.redirect(307, `https://${req.header('host')}${req.url}`);
}
});
if (secureHstsHeader) { // Add HSTS (HTTP Strict Transport Security) header
const enableCSP = env.secureCsp ? true : false;
console.info('Enabled SECURE_HSTS_HEADER (HTTP Strict Transport Security)');
const helmet = require('helmet');
var includeSubDomainsValue = env.secureHstsHeaderIncludeSubdomains;
var preloadValue = env.secureHstsHeaderPreload;
app.use(helmet({
hsts: {
maxAge: 31536000
, includeSubDomains: includeSubDomainsValue
, preload: preloadValue
}
, frameguard: false
, contentSecurityPolicy: enableCSP
}));
if (enableCSP) {
var secureCspReportOnly = env.secureCspReportOnly;
if (secureCspReportOnly) {
console.info('Enabled SECURE_CSP (Content Security Policy header). Not enforcing. Report only.');
} else {
console.info('Enabled SECURE_CSP (Content Security Policy header). Enforcing.');
}
let frameAncestors = ["'self'"];
for (let i = 0; i <= 8; i++) {
let u = env.settings['frameUrl' + i];
if (u) {
frameAncestors.push(u);
}
}
app.use(helmet.contentSecurityPolicy({ //TODO make NS work without 'unsafe-inline'
directives: {
defaultSrc: ["'self'"]
, styleSrc: ["'self'", 'https://fonts.googleapis.com/', 'https://fonts.gstatic.com/', "'unsafe-inline'"]
, scriptSrc: ["'self'", "'unsafe-inline'"]
, fontSrc: ["'self'", 'https://fonts.googleapis.com/', 'https://fonts.gstatic.com/', 'data:']
, imgSrc: ["'self'", 'data:']
, objectSrc: ["'none'"] // Restricts <object>, <embed>, and <applet> elements
, reportUri: '/report-violation'
, baseUri: ["'none'"] // Restricts use of the <base> tag
, formAction: ["'self'"] // Restricts where <form> contents may be submitted
, connectSrc: ["'self'", "ws:", "wss:", 'https://fonts.googleapis.com/', 'https://fonts.gstatic.com/']
, frameSrc: ["'self'"]
, frameAncestors: frameAncestors
}
, reportOnly: secureCspReportOnly
}));
app.use(helmet.referrerPolicy({ policy: 'no-referrer' }));
app.use(bodyParser.json({ type: ['json', 'application/csp-report'] }));
app.post('/report-violation', (req, res) => {
if (req.body) {
console.log('CSP Violation: ', req.body);
} else {
console.log('CSP Violation: No data received!');
}
res.status(204).end();
})
}
}
} else {
console.info('Security settings: INSECURE_USE_HTTP=', insecureUseHttp, ', SECURE_HSTS_HEADER=', secureHstsHeader);
}
app.set('view engine', 'ejs');
// this allows you to render .html files as templates in addition to .ejs
app.engine('html', require('ejs').renderFile);
app.set("views", path.join(__dirname, "views/"));
let cacheBuster = 'developmentMode';
let lastModified = new Date();
let busterPath = '/tmp/cacheBusterToken';
if (process.env.NODE_ENV !== 'development') {
busterPath = process.cwd() + busterPath;
} else {
busterPath = __dirname + busterPath;
}
if (fs.existsSync(busterPath)) {
cacheBuster = fs.readFileSync(busterPath).toString().trim();
var stats = fs.statSync(busterPath);
lastModified = stats.mtime;
}
app.locals.cachebuster = cacheBuster;
app.get("/robots.txt", (req, res) => {
res.setHeader('Content-Type', 'text/plain');
res.send(['User-agent: *','Disallow: /'].join('\n'));
});
app.get("/sw.js", (req, res) => {
res.setHeader('Content-Type', 'application/javascript');
if (process.env.NODE_ENV !== 'development') {
res.setHeader('Last-Modified', lastModified.toUTCString());
}
res.send(ejs.render(fs.readFileSync(
require.resolve(`${__dirname}/views/service-worker.js`),
{ encoding: 'utf-8' }),
{ locals: app.locals}
));
});
if (ctx.bootErrors && ctx.bootErrors.length > 0) {
app.get('*', require('./lib/server/booterror')(ctx));
return app;
}
if (env.settings.isEnabled('cors')) {
var allowOrigin = _get(env, 'extendedSettings.cors.allowOrigin') || '*';
console.info('Enabled CORS, allow-origin:', allowOrigin);
app.use(function allowCrossDomain (req, res, next) {
res.header('Access-Control-Allow-Origin', allowOrigin);
res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization, Content-Length, X-Requested-With');
// intercept OPTIONS method
if ('OPTIONS' === req.method) {
res.send(200);
} else {
next();
}
});
}
///////////////////////////////////////////////////
// api and json object variables
///////////////////////////////////////////////////
const apiRoot = require('./lib/api/root')(env, ctx);
var api = require('./lib/api/')(env, ctx);
var api3 = require('./lib/api3/')(env, ctx);
var ddata = require('./lib/data/endpoints')(env, ctx);
var notificationsV2 = require('./lib/api/notifications-v2')(app, ctx);
app.use(compression({
filter: function shouldCompress (req, res) {
//TODO: return false here if we find a condition where we don't want to compress
// fallback to standard filter function
return compression.filter(req, res);
}
}));
var appPages = {
"/": {
file: "index.html"
, type: "index"
}
, "/admin": {
file: "adminindex.html"
, title: 'Admin Tools'
, type: 'admin'
}
, "/food": {
file: "foodindex.html"
, title: 'Food Editor'
, type: 'food'
}
, "/profile": {
file: "profileindex.html"
, title: 'Profile Editor'
, type: 'profile'
}
, "/report": {
file: "reportindex.html"
, title: 'Nightscout reporting'
, type: 'report'
}
, "/translations": {
file: "translationsindex.html"
, title: 'Nightscout translations'
, type: 'translations'
}
, "/split": {
file: "frame.html"
, title: '8-user view'
, type: 'index'
}
};
Object.keys(appPages).forEach(function(page) {
app.get(page, (req, res) => {
res.render(appPages[page].file, {
locals: app.locals,
title: appPages[page].title ? appPages[page].title : '',
type: appPages[page].type ? appPages[page].type : '',
settings: env.settings
});
});
});
const clockviews = require('./lib/server/clocks.js')(env, ctx);
clockviews.setLocals(app.locals);
app.use("/clock", clockviews);
app.use('/api', bodyParser({
limit: 1048576 * 50
}), apiRoot);
app.use('/api/v1', bodyParser({
limit: 1048576 * 50
}), api);
app.use('/api/v2', bodyParser({
limit: 1048576 * 50
}), api);
app.use('/api/v2/properties', ctx.properties);
app.use('/api/v2/authorization', ctx.authorization.endpoints);
app.use('/api/v2/ddata', ddata);
app.use('/api/v2/notifications', notificationsV2);
app.use('/api/v3', api3);
// pebble data
app.get('/pebble', ctx.pebble);
// expose swagger.json
app.get('/swagger.json', function(req, res) {
res.sendFile(__dirname + '/swagger.json');
});
// expose swagger.yaml
app.get('/swagger.yaml', function(req, res) {
res.sendFile(__dirname + '/swagger.yaml');
});
/* // FOR DEBUGGING MEMORY LEEAKS
if (env.settings.isEnabled('dumps')) {
var heapdump = require('heapdump');
app.get('/api/v2/dumps/start', function(req, res) {
var path = new Date().toISOString() + '.heapsnapshot';
path = path.replace(/:/g, '-');
console.info('writing dump to', path);
heapdump.writeSnapshot(path);
res.send('wrote dump to ' + path);
});
}
*/
// app.get('/package.json', software);
// Allow static resources to be cached for week
var maxAge = 7 * 24 * 60 * 60 * 1000;
if (process.env.NODE_ENV === 'development') {
maxAge = 1;
console.log('Development environment detected, setting static file cache age to 1 second');
}
var staticFiles = express.static(env.static_files, {
maxAge
});
// serve the static content
app.use(staticFiles);
// API docs
const swaggerUi = require('swagger-ui-express');
const swaggerDocument = require('./swagger.json');
app.use('/api-docs', swaggerUi.serve, swaggerUi.setup(swaggerDocument));
app.use('/swagger-ui-dist', (req, res) => {
res.redirect(307, '/api-docs');
});
// if this is dev environment, package scripts on the fly
// if production, rely on postinstall script to run packaging for us
app.locals.bundle = '/bundle';
app.locals.mode = 'production';
if (process.env.NODE_ENV === 'development') {
console.log('Development mode');
app.locals.mode = 'development';
app.locals.bundle = '/devbundle';
const webpack = require('webpack');
var webpack_conf = require('./webpack.config');
const middleware = require('webpack-dev-middleware');
const compiler = webpack(webpack_conf);
app.use(
middleware(compiler, {
// webpack-dev-middleware options
publicPath: webpack_conf.output.publicPath
, lazy: false
})
);
app.use(require("webpack-hot-middleware")(compiler, {
heartbeat: 1000
}));
}
// Production bundling
var tmpFiles;
if (fs.existsSync(process.cwd() + '/tmp/cacheBusterToken')) {
tmpFiles = express.static('tmp', {
maxAge: maxAge
});
} else {
tmpFiles = express.static(__dirname + '/tmp', {
maxAge: maxAge
});
}
// serve the static content
app.use('/bundle', tmpFiles);
if (process.env.NODE_ENV !== 'development') {
console.log('Production environment detected, enabling Minify');
var minify = require('express-minify');
var myCssmin = require('cssmin');
app.use(minify({
js_match: /\.js/
, css_match: /\.css/
, sass_match: /scss/
, less_match: /less/
, stylus_match: /stylus/
, coffee_match: /coffeescript/
, json_match: /json/
, cssmin: myCssmin
, cache: __dirname + '/tmp'
, onerror: undefined
, }));
}
// Handle errors with express's errorhandler, to display more readable error messages.
var errorhandler = require('errorhandler');
//if (process.env.NODE_ENV === 'development') {
app.use(errorhandler());
//}
return app;
}
module.exports = create;