// @flow // Server-side renderer for our React code const debug = require('debug')('hyperion:renderer'); import React from 'react'; // $FlowIssue import { renderToNodeStream } from 'react-dom/server'; import { ServerStyleSheet } from 'styled-components'; import { ApolloProvider, getDataFromTree } from 'react-apollo'; import { ApolloClient } from 'apollo-client'; import { SchemaLink } from 'apollo-link-schema'; import schema from 'api/schema'; import createLoaders from 'api/loaders'; import { createHttpLink } from 'apollo-link-http'; import { InMemoryCache, IntrospectionFragmentMatcher, } from 'apollo-cache-inmemory'; import { StaticRouter } from 'react-router'; import { Provider } from 'react-redux'; import { HelmetProvider } from 'react-helmet-async'; import Loadable from 'react-loadable'; import { getBundles } from 'react-loadable/webpack'; import Raven from 'shared/raven'; import introspectionQueryResultData from 'shared/graphql/schema.json'; // $FlowIssue import stats from '../../build/react-loadable.json'; import getSharedApolloClientOptions from 'shared/graphql/apollo-client-options'; import { getFooter, getHeader } from './html-template'; // Browser shim has to come before any client imports import './browser-shim'; const Routes = require('../../src/routes').default; import { initStore } from '../../src/store'; const IN_MAINTENANCE_MODE = process.env.REACT_APP_MAINTENANCE_MODE === 'enabled'; const IS_PROD = process.env.NODE_ENV === 'production'; const FORCE_DEV = process.env.FORCE_DEV; const FIVE_MINUTES = 300; const ONE_HOUR = 3600; if (!IS_PROD || FORCE_DEV) debug('Querying API at localhost:3001/api'); const renderer = (req: express$Request, res: express$Response) => { res.setHeader('Content-Type', 'text/html; charset=utf-8'); if (IN_MAINTENANCE_MODE) { res.status(500); res.send( `Spectrum

🛠

We are currently undergoing maintenance.

We'll be back shortly. Follow @withspectrum on Twitter to stay up to date.

` ); return; } debug(`server-side render ${req.url}`); debug(`querying API at https://${req.hostname}/api`); const schemaLink = new SchemaLink({ schema, context: { user: req.user || null, loaders: createLoaders(), }, }); const cache = new InMemoryCache({ fragmentMatcher: new IntrospectionFragmentMatcher({ introspectionQueryResultData, }), ...getSharedApolloClientOptions(), }); // Get the nonce attached to every request // This nonce is generated by our security middleware const nonce = typeof res.locals.nonce === 'string' ? res.locals.nonce : undefined; if (!nonce) throw new Error('Security nonce not set.'); // Create an Apollo Client with a local network interface const client = new ApolloClient({ ssrMode: true, link: schemaLink, cache, }); // Define the initial redux state const { t } = req.query; const initialReduxState = {}; // Create the Redux store const store = initStore(initialReduxState); let modules = []; const report = moduleName => { modules.push(moduleName); }; let routerContext = {}; let helmetContext = {}; // Initialise the styled-components stylesheet and wrap the app with it const sheet = new ServerStyleSheet(); const frontend = sheet.collectStyles( ); debug('get data from tree'); getDataFromTree(frontend) .then(() => { debug('got data from tree'); if (routerContext.url) { debug('found redirect on frontend, redirecting'); // Somewhere a `` was rendered, so let's redirect server-side res.redirect(301, routerContext.url); return; } // maintenance mode if (IN_MAINTENANCE_MODE) { debug('maintenance mode enabled, sending 503'); res.status(503); res.set('Retry-After', '3600'); } else { res.status(200); } const state = store.getState(); const data = client.extract(); const { helmet } = helmetContext; debug('write header'); // Use now's CDN to cache the rendered pages in CloudFlare for half an hour // Ref https://vercel.co/docs/features/cdn if (!req.user) { res.setHeader( 'Cache-Control', `s-maxage=${ONE_HOUR}, stale-while-revalidate=${FIVE_MINUTES}, must-revalidate` ); } else { res.setHeader('Cache-Control', 's-maxage=0, private'); } res.write( getHeader({ metaTags: helmet.title.toString() + helmet.meta.toString() + helmet.link.toString(), nonce: nonce, }) ); const stream = sheet.interleaveWithNodeStream( renderToNodeStream(frontend) ); stream.pipe( res, { end: false } ); const bundles = getBundles(stats, modules) // Create