Adding html.js component

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Let’s clean up the code a bit and move the html code from ./ssr-server.js to a separate component called html.js.

./html.js

import React from 'react';

const Html = ({ content, cssBundles, jsBundles, apolloClient }) => (
  <html lang="en">
  <head>
    <meta charSet="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>Server Side Rendering and Bundle Splitting</title>
    <link
    href="/dist/main.css"
    rel="stylesheet"
    as="style"
    media="screen, projection"
    type="text/css"
    charSet="UTF-8"
  />

    {
      cssBundles.map( (bundle) => 
        (<link
          href={`${bundle.publicPath}`}
          rel="stylesheet"
          as="style"
          media="screen, projection"
          type="text/css"
          charSet="UTF-8"
        />))
    }

    {jsBundles.map( ( {file}) => (<script src={`/dist/${file}`}>{file}</script>) )}
  </head>
  <body cz-shortcut-listen="true">
    <div id="root" dangerouslySetInnerHTML={{ __html: content }} />
    <script dangerouslySetInnerHTML={{
          __html: `window.__APOLLO_STATE__=${JSON.stringify(apolloClient.cache.extract())}`}} />
  
    <script src="/dist/main-bundle.js"></script>
  </body>
</html>  

);

export default Html;

what we just did:
– we created a plain react component that will accept 3 parameters:
    – content [string]: rendered components returned from react-apollo  renderToStringWithData(…)
    – cssBundles [array of CSS bundle objects]:
    – jsBundles [array of js bundle objects]:
apolloClient [Object]:
An instance of the Apollo client.

 

And now, let’s remove the HTML coder from ./server.js and add the new component instead, passing all necessary parameters.

./server-js

import React from 'react';
import express from 'express';
import App from './src/components/App/ssr-index';
import Loadable from 'react-loadable';
import manifest from './dist/loadable-manifest.json';
import { getDataFromTree } from "react-apollo";
import { ApolloClient } from 'apollo-client';
import { InMemoryCache } from 'apollo-cache-inmemory';
import { renderToStringWithData } from "react-apollo"
import { createHttpLink } from 'apollo-link-http';
import { getBundles } from 'react-loadable/webpack';
import ReactDOMServer from 'react-dom/server';
import Html from './html.js';

const PORT = process.env.PROD_SERVER_PORT;
const app = express();

app.use('/server-build', express.static('./server-build'));
app.use('/dist', express.static('dist')); // to serve frontent prod static files
app.use('/favicon.ico', express.static('./src/images/favicon.ico'));

app.get('/*', (req, res) => {

  const GRAPHQL_URL = process.env.GRAPHQL_URL;
  const client = new ApolloClient({
    ssrMode: true,
    link: createHttpLink({
     uri: GRAPHQL_URL,
     fetch: fetch,
     credentials: 'same-origin',
     headers: {
       cookie: req.header('Cookie'),
     },
   }), 
    cache: new InMemoryCache()
  });    

  // Prepare to get list of all modules that have to be loaded for this route
  const modules = [];
  const mainApp = (
    <Loadable.Capture report={moduleName => modules.push(moduleName)}>
      <App req={req} client={client} />
    </Loadable.Capture>    
  );

  // Execute all queries and fetch the results before continue
  getDataFromTree(mainApp).then(() => {        
    // Once we have the data back, this will render the components with the appropriate GraphQL data.
    renderToStringWithData(<App req={req} client={client} />).then( (HTML_content) => {
      // Extract CSS and JS bundles
      const bundles = getBundles(manifest, modules); 
      const cssBundles = bundles.filter(bundle => bundle && bundle.file.split('.').pop() === 'css');
      const jsBundles = bundles.filter(bundle => bundle && bundle.file.split('.').pop() === 'js');
    
      const html = <Html content={HTML_content} cssBundles={cssBundles} jsBundles={jsBundles} apolloClient={client} />;

      res.status(200);
      res.send(`<!doctype html>\n${ReactDOMServer.renderToStaticMarkup(html)}`);
      res.end(); 
    });    



  }).catch( (error) => {
    console.log("ERROR !!!!", error);
  });
});

Loadable.preloadAll().then(() => {
  app.listen(PORT, () => {
    console.log(`😎 Server is listening on port ${PORT}`);
  });
});
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