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September 8, 2018 08:47
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/* eslint-disable global-require */ | |
import express from 'express' | |
import compression from 'compression' | |
import favicon from 'serve-favicon' | |
import bodyParser from 'body-parser' | |
import cookieParser from 'cookie-parser' | |
import helmet from 'helmet' | |
import csrf from 'csurf' | |
import apiProxyMiddleware from './middlewares/apiProxyMiddleware' | |
import authenticate from './middlewares/authenticate' | |
import generateNonceForInlineScripts from './middlewares/nonce' | |
import cspViolationReportHandler from './middlewares/cspViolationReport' | |
import errorHandler from './middlewares/errorHandler' | |
import ensureSecureConnection from './middlewares/ensureSecureConnection' | |
import createHealthcheck from './middlewares/healthcheck' | |
const SIX_MONTH_IN_SECONDS = 6 * 30 * 24 * 60 * 60 | |
const isGoogleUserAgent = req => | |
(req.headers['user-agent'] || '').toLowerCase().indexOf('googlehc') !== -1 | |
export default class Server { | |
constructor(options) { | |
const { host, port } = options | |
this.options = options | |
this._port = port | |
this._host = host | |
this._app = express() | |
} | |
setupCommon() { | |
const { apiEndpointPath, backendUrl, faviconPath, cspRules } = this.options | |
const app = this._app | |
app.use(compression()) | |
// Security headers | |
// Remove the X-Powered-By header | |
app.use(helmet.hidePoweredBy()) | |
// Sets "X-Frame-Options: DENY" | |
app.use(helmet.frameguard({ action: 'deny' })) | |
// Sets "X-DNS-Prefetch-Control: off" | |
app.use(helmet.dnsPrefetchControl({ allow: false })) | |
// Sets "Strict-Transport-Security: max-age=15780000". | |
app.use( | |
helmet.hsts({ maxAge: SIX_MONTH_IN_SECONDS, includeSubDomains: false }) | |
) | |
// Sets "X-Download-Options: noopen". | |
app.use(helmet.ieNoOpen()) | |
// Sets "X-Content-Type-Options: nosniff" | |
app.use(helmet.noSniff()) | |
// Sets "X-XSS-Protection: 1; mode=block" | |
app.use(helmet.xssFilter()) | |
// CSP Rules | |
// docs https://helmetjs.github.io/docs/csp/ | |
if (cspRules) { | |
app.use(generateNonceForInlineScripts) | |
const REPORT_URL = '/report-violation' | |
app.use( | |
helmet.contentSecurityPolicy({ | |
...cspRules, | |
browserSniff: false, | |
reportUri: REPORT_URL, | |
}) | |
) | |
app.post( | |
REPORT_URL, | |
bodyParser.json({ | |
type: ['json', 'application/csp-report'], | |
}), | |
cspViolationReportHandler | |
) | |
} | |
// TODO TEMP way to handle favicon - use Helmet and manifest.json | |
app.use(favicon(faviconPath)) | |
// enable csrf protection to all routes except ['GET', 'HEAD', 'OPTIONS'] | |
app.use(cookieParser()) | |
app.use(csrf({ cookie: true })) | |
app.use(apiEndpointPath, apiProxyMiddleware('/api', backendUrl)) | |
} | |
setupAuthentication() { | |
const { | |
authCookieName, | |
backendUrl, | |
graphqlEndpointPath, | |
findUser, | |
} = this.options | |
this._app.use( | |
authenticate({ | |
authCookieName, | |
backendUrl, | |
graphqlEndpointPath, | |
findUser, | |
}) | |
) | |
} | |
setupDev({ webpackClientConfig, webpackServerConfig }) { | |
this.setupCommon() | |
const { initRoutes } = this.options | |
const config = [webpackClientConfig, webpackServerConfig] | |
const compiler = require('webpack')(config) | |
this._app.use( | |
require('webpack-dev-middleware')(compiler, { | |
noInfo: true, | |
stats: false, | |
serverSideRender: true, | |
}) | |
) | |
// we do not want authenticate asset requests, so place auth middleware after | |
this.setupAuthentication() | |
initRoutes(this._app, this.options) | |
this._app.use(require('webpack-hot-server-middleware')(compiler)) | |
} | |
setupProd({ stats, assetsDir, ssr, healthcheck, ensureHttps }) { | |
this._app.use(createHealthcheck(healthcheck || isGoogleUserAgent)) | |
if (ensureHttps) { | |
this._app.use(ensureSecureConnection) | |
} | |
this.setupCommon() | |
this._app.use( | |
'/assets', | |
express.static(assetsDir, { | |
maxage: '30d', | |
etag: false, | |
setHeaders(res) { | |
res.setHeader('Access-Control-Allow-Origin', '*') | |
}, | |
}) | |
) | |
// we do not want authenticate asset requests, so place auth middleware after | |
this.setupAuthentication() | |
if (typeof this.options.initRoutes === 'function') { | |
this.options.initRoutes(this._app, this.options) | |
} | |
this._app.use(ssr({ clientStats: stats })) | |
} | |
listen() { | |
this._app.use(errorHandler) | |
this._app.listen(this._port, this._host, () => { | |
// eslint-disable-next-line no-console | |
console.log(`server started http://${this._host}:${this._port}`) | |
if (typeof process.send === 'function') { | |
process.send({ | |
started: true, | |
url: `http://${this._host}:${this._port}`, | |
}) | |
} | |
}) | |
} | |
} |
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