peridot/common/frontend_server/index.mjs

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/*
* Copyright (c) All respective contributors to the Peridot Project. All rights reserved.
* Copyright (c) 2021-2022 Rocky Enterprise Software Foundation, Inc. All rights reserved.
* Copyright (c) 2021-2022 Ctrl IQ, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
import express from 'express';
import httpProxyMiddleware from 'http-proxy-middleware';
import bodyParser from 'body-parser';
import cookieParser from 'cookie-parser';
import helmet from 'helmet';
import webpack from 'webpack';
import webpackDevMiddleware from 'webpack-dev-middleware';
import webpackHotMiddleware from 'webpack-hot-middleware';
import webpackMildCompile from 'webpack-mild-compile';
import expressOidc from 'express-openid-connect';
import history from 'connect-history-api-fallback';
import hbs from 'hbs';
import evilDns from 'evil-dns';
import fs from 'fs';
import dns from 'dns';
const { createProxyMiddleware } = httpProxyMiddleware;
const { auth } = expressOidc;
export default async function (opts) {
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// Create a new app for health checks.
const appZ = express();
appZ.get('/healthz', (req, res) => {
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res.end();
});
appZ.get('/_/healthz', (req, res) => {
res.end();
});
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const app = express();
app.use(function (req, res, next) {
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// Including resf-internal-req: 1 should return the Z page
if (req.header('resf-internal-req') === 'yes') {
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appZ(req, res, next);
} else {
next();
}
});
const prod = process.env.NODE_ENV === 'production';
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const port = prod ? process.env.PORT || 8086 : opts.port;
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opts.secret = process.env.RESF_SECRET;
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// If we're in prod, then a secret has to be present
if (prod && (!opts.secret || opts.secret.length < 32)) {
throw 'secret has to be at least 32 characters';
}
// Add authentication if not disabled
if (!opts.disableAuth) {
console.log(`Using issuer: ${opts.issuerBaseURL}`);
console.log(`Using clientID: ${opts.clientID}`);
console.log(`Using baseURL: ${opts.baseURL}`);
if (
(opts.issuerBaseURL.endsWith('.localhost') ||
opts.issuerBaseURL.endsWith('.localhost/')) &&
process.env['RESF_ENV']
) {
const kong = 'kong-proxy.kong.svc.cluster.local';
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const urlObject = new URL(opts.issuerBaseURL);
console.warn(`Forcing ${urlObject.hostname} to resolve to ${kong}`);
const lookup = async () => {
return new Promise((resolve, reject) => {
// noinspection HttpUrlsUsage
dns.lookup(kong, { family: 4 }, (err, address, family) => {
if (err) {
reject(err);
}
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resolve(address);
});
});
};
const internalServiceResolve = await lookup();
evilDns.add(urlObject.hostname, internalServiceResolve);
// Disable TLS verification for development
process.env['NODE_TLS_REJECT_UNAUTHORIZED'] = 0;
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}
const config = {
authRequired: process.env['DISABLE_AUTH_ENFORCE']
? process.env['DISABLE_AUTH_ENFORCE'] === 'false'
: !!!opts.disableAuthEnforce,
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// Disable telemetry
enableTelemetry: false,
// Use dev secret is none is present (Prod requires a secret so not a security issue)
secret: opts.secret || 'dev-secret-123',
// Add BaseURL for callback purposes. This has to be specified in the initial server call
// The FRONTEND_URL environment variable can override this value in prod.
baseURL: opts.baseURL,
// The specific application should supply a dev client ID while prod IDs should be set as an env variable
clientID: opts.clientID,
// The specific application should supply a dev secret while prod secrets should be set as an env variable
clientSecret: opts.clientSecret,
issuerBaseURL: opts.issuerBaseURL,
idpLogout: true,
authorizationParams: {
response_type: 'code',
scope: 'openid profile email offline_access',
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},
session: {
rolling: true,
rollingDuration: 86400,
absoluteDuration: 86400 * 7,
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},
routes: {
callback: '/oauth2/callback',
logout: '/oauth2/logout',
login: '/oauth2/login',
},
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};
// If we have a authentication prefix, only force redirect on paths with that prefix
// Remember, authentication done here is only for simplicity purposes.
// The authentication token is then passed on to the API.
// Bypassing auth here doesn't accomplish anything.
let middlewares = [];
// If requireEmailSuffix is present, let's validate post callback
// that the signed in email ends with a suffix in the allowlist
// Again, a bypass here doesn't accomplish anything.
let requireEmailSuffix = opts.authOptions?.requireEmailSuffix;
if (process.env['AUTH_OPTIONS_REQUIRE_EMAIL_SUFFIX']) {
requireEmailSuffix =
process.env['AUTH_OPTIONS_REQUIRE_EMAIL_SUFFIX'].split(',');
}
if (requireEmailSuffix) {
middlewares.push((req, res, next) => {
const email = req.oidc?.user?.email;
if (!email) {
return next('No email found in the user object');
}
const suffixes = requireEmailSuffix;
let isAllowed = false;
for (const suffix of suffixes) {
if (email.endsWith(suffix)) {
isAllowed = true;
break;
}
}
if (isAllowed) {
next();
} else {
res.redirect(
process.env['AUTH_REJECT_REDIRECT_URL']
? process.env['AUTH_REJECT_REDIRECT_URL']
: opts.authOptions.authRejectRedirectUrl ||
'https://rockylinux.org'
);
}
});
}
app.use(
(req, res, next) => {
try {
auth(config)(req, res, next);
} catch (err) {
next(err);
}
},
[middlewares]
);
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}
// Currently in dev, webpack is handling all file serving
// This is just a placeholder
let distDir = process.cwd() + '/dist';
if (prod) {
// Enable security hardening in prod
app.use(
helmet({
contentSecurityPolicy: false,
})
);
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// Prod expects a certain container structure for all apps
// Packaging this application with the web base should do
// all this for you
const dirs = fs.readdirSync('/home/app/bundle');
distDir = `/home/app/bundle/${dirs[0]}`;
}
app.set('views', distDir);
app.use(cookieParser());
app.set('view engine', 'hbs');
// Use the handlebar engine
app.engine('hbs', hbs.__express);
app.use(express.static(distDir));
if (opts.apis) {
Object.keys(opts.apis).forEach((x) => {
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app.use(x, async (req, res, next) => {
let authorization = '';
// If we have an authenticated user, send the token with the request
if (req.oidc && req.oidc.accessToken) {
let { access_token, isExpired, refresh } = req.oidc.accessToken;
if (isExpired()) {
try {
({ access_token } = await refresh());
} catch (err) {
res.oidc.logout({ returnTo: '/' });
return next('User has to re-authenticate');
}
}
authorization = `Bearer ${access_token}`;
if (!prod) {
console.log(`Using id token: ${req.oidc.idToken}`);
console.log(`Using access token: ${access_token}`);
}
}
const rewrite = {};
rewrite[`^${x}`] = '';
// Make it possible to override api url using an env variable.
// Example: /api can be set with URL_API
// Example 2: /manage/api can be set with URL_MANAGE_API
const prodEnvName = `URL_${x
.substr(1)
.replace('/', '_')
.toUpperCase()}`;
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const apiUrl = process.env[prodEnvName]
? process.env[prodEnvName]
: prod
? opts.apis[x].prodApiUrl
: opts.apis[x].devApiUrl;
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createProxyMiddleware({
target: apiUrl,
changeOrigin: true,
headers: {
host: apiUrl,
authorization,
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},
pathRewrite: rewrite,
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})(req, res);
});
});
}
// Template parameters for values in initial state
const templateParams = (req) => {
// If auth is disabled, then either return an empty list
// or run the templateFunc WITHOUT a user.
// It's important that apps do not use `user` without validation
if (opts.disableAuth || !req.oidc) {
if (opts.templateFunc) {
return opts.templateFunc();
}
return {};
}
const { user } = req.oidc;
if (!user) {
return {};
}
if (opts.templateFunc) {
return opts.templateFunc(user);
}
// Return default values
const { email, name, picture } = user;
return {
email,
name,
picture,
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};
};
if (prod) {
app.get('/*', (req, res) => {
// Prod doesn't do hacky shit with the webpack compiler so just add the params
// to the locals
res.locals = templateParams(req);
res.render('index');
});
} else {
// Here comes the hack train
if (!opts.webpackConfig && opts.webpackPath) {
opts.webpackConfig = await import(opts.webpackPath);
}
// Create a live-reloading dev instance of the app with the given webpack config
const compiler = webpack(opts.webpackConfig);
webpackMildCompile(compiler);
const wdm = webpackDevMiddleware(compiler, {
publicPath: opts.webpackConfig.output.publicPath,
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});
app.use(history());
app.use((req, res, next) => {
// Here we cache the old send function to re-use after we run the HTML through handlebars
const oldSend = res.send;
res.send = (data) => {
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let newData;
// Check if the request returned a HTML page
// For SPAs, the only HTML page is the index page
if (res.get('content-type').indexOf('text/html') !== -1) {
// Run through handlebars compiler with our template parameters
newData = hbs.handlebars.compile(data.toString())(
templateParams(req)
);
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} else {
// No new data, just return old data
newData = data;
}
// Re-replace res.send with the old res.send
res.send = oldSend;
// Run the old res.send with the new data
return res.send(newData);
};
next();
});
// Enable hot reload
app.use(wdm);
app.use(webpackHotMiddleware(compiler));
}
// Enable JSON bodies. We're forwarding this to the API
app.use(bodyParser.json());
console.log(`view app on ${opts.baseURL}`);
app.listen(port);
}