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server.js
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server.js
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import url from "url";
import express from "express";
import path from "path";
import helmet from "helmet";
import { Helmet as ReactHelmet } from "react-helmet";
import React from "react";
import { renderToString } from "react-dom/server";
import { StaticRouter } from "react-router";
import Main from "./main.jsx";
import securityHeaders from "./js/security-headers";
import { envUtilities, env } from "./js/env-server";
const app = express();
// Find the port we're using. If we're deployed on heroku,
// that information will not be in our config because the
// bundle compilation will have taken place on a different
// dyno from where the code actually runs, but is available
// at runtime as a PORT environment variable
const PORT = env.PORT;
// Define the host that the app expects to serve
const APP_HOST = env.APP_HOST;
// what environment are we running in
const NODE_ENV = env.NODE_ENV;
// are we running on staging?
const ON_STAGING_SERVER = env.STAGING_SERVER === `True`;
// maxAge for HSTS header must be at least 6 months
// (see https://wiki.mozilla.org/Security/Guidelines/Web_Security#HTTP_Strict_Transport_Security)
const hstsMiddleware = helmet.hsts({
maxAge: 31536000, // 12 months in seconds
includeSubDomains: true,
preload: true,
});
// disable x-powered-by
app.disable(`x-powered-by`);
// Some app security settings
app.use(helmet.contentSecurityPolicy(securityHeaders));
app.use(
helmet.xssFilter({
setOnOldIE: true,
})
);
// No-index and No-follow in "not production"
if (ON_STAGING_SERVER) {
app.use((req, res, next) => {
res.setHeader("X-Robots-Tag", "noindex, noarchive, nofollow");
next();
});
}
app.use((req, res, next) => {
if (req.secure) {
hstsMiddleware(req, res, next);
} else {
next();
}
});
app.use(helmet.ieNoOpen());
app.use(helmet.noSniff());
app.use(
helmet.frameguard({
action: `deny`,
})
);
// production specific configuration and middleware
if (NODE_ENV === `production`) {
// trust x-forwarded-proto headers in production
app.enable(`trust proxy`);
// Redirect to the configured hostname & make sure that content is served via on https in production
app.use((req, res, next) => {
if (req.headers.host === APP_HOST && req.protocol === `https`) {
return next();
}
return res.redirect(`https://${APP_HOST}${req.url}`);
});
}
app.use(express.static(path.resolve(__dirname, `dist`)));
if (NODE_ENV !== `development`) {
app.get(`/admin`, (req, res) => {
let pulseHost = url.parse(env.PULSE_API);
res.redirect(`${pulseHost.protocol}//${pulseHost.host}/admin`);
});
}
function renderPage(appHtml, reactHelmet, canonicalUrl) {
const meta = {
url: canonicalUrl,
title: `Mozilla Pulse`,
description: `Discover & collaborate on projects for a healthy internet.`,
type: `website`,
image: {
url: `https://assets.mofoprod.net/network-pulse/images/mozilla-og-image-min.original.jpg`,
type: `image/jpg`,
width: `600`,
height: `600`,
altText: `Mozilla logo`,
},
};
const twitterCard = `
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="${meta.title}">
<meta name="twitter:description" content="${meta.description}">
<meta name="twitter:image" content="${meta.image.url}">
`;
const ogTags = `
<meta property="og:url" content="${meta.url}" />
<meta property="og:title" content="${meta.title}" />
<meta property="og:description" content="${meta.description}" />
<meta property="og:site_name" content="${meta.title}" />
<meta property="og:type" content="${meta.type}">
<meta property="og:image" content="${meta.image.url}" />
<meta property="og:image:type" content="${meta.image.type}" />
<meta property="og:image:width" content="${meta.image.width}" />
<meta property="og:image:height" content="${meta.image.height}" />
<meta property="og:image:alt" content="${meta.image.altText}" />
`;
const noIndex = ON_STAGING_SERVER
? `<meta name="googlebot" content="noindex, nofollow, noarchive" />`
: ``;
let recaptcha = ``;
if (env.USE_RECAPTCHA) {
recaptcha = `<script src="https://www.google.com/recaptcha/api.js?render=${env.RECAPTCHA_KEY}" async></script>`;
}
return `
<!doctype html>
<html>
<head>
<title>"${meta.title}"</title>
<meta charset="utf-8">
${noIndex}
<meta name="description" content="${meta.description}">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
${twitterCard}
${ogTags}
<script src="https://platform.twitter.com/widgets.js" async defer></script>
<link rel="apple-touch-icon" type="image/png" sizes="180x180" href="/assets/favicons/[email protected]">
<link rel="icon" type="image/png" sizes="196x196" href="/assets/favicons/[email protected]">
<link rel="shortcut icon" href="/assets/favicons/favicon.ico">
<link rel="manifest" href="/manifest.json">
<link rel="stylesheet" type="text/css" href="https://code.cdn.mozilla.net/fonts/zilla-slab.css">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Nunito+Sans:300,300i,400,600,700">
<link rel="stylesheet" type="text/css" href="/css/font-awesome.min.css">
<link rel="stylesheet" type="text/css" href="/css/main.css">
<link rel="alternate" type="application/rss+xml" href="${env.PULSE_API.replace(
`api/pulse`,
``
)}rss/latest">
${reactHelmet.title.toString()}
<meta name="ga-identifier" content="UA-87658599-4">
<meta name="gtm-identifier" content="GTM-KHLX47C">
${recaptcha}
</head>
<body>
<div id="app">${appHtml}</div>
<script type="application/json" id="environment-variables">${envUtilities.serializeSafeEnvAsJSON()}</script>
<script src="/bundle.js"></script>
</body>
</html>`;
}
app.get(`*`, (req, res) => {
const reactHelmet = ReactHelmet.renderStatic();
const context = {}; // context object contains the results of the render
const appHtml = renderToString(
<StaticRouter location={req.url} context={context}>
<Main />
</StaticRouter>
);
if (context.url) {
// Somewhere a `<Redirect>` was rendered
res.redirect(301, context.url);
} else {
let canonicalUrl = `${req.protocol}://${req.hostname}${req.path}`;
res
.status(context.pageNotFound ? 404 : 200)
.send(renderPage(appHtml, reactHelmet, canonicalUrl));
}
});
app.listen(PORT, () => {
console.log(`\n*******************************************`);
console.log(`* *`);
console.log(`* Network Pulse listening on port ${PORT} *`);
console.log(`* *`);
console.log(`*******************************************\n`);
});