Function renderApp

fixtures/flight/server/global.js:89–227

(req, res, next)

}

async function renderApp(req, res, next) {
  // Proxy the request to the regional server.
  const proxiedHeaders = {
    'X-Forwarded-Host': req.hostname,
    'X-Forwarded-For': req.ips,
    'X-Forwarded-Port': 3000,
    'X-Forwarded-Proto': req.protocol,
  };
  // Proxy other headers as desired.
  if (req.get('rsc-action')) {
    proxiedHeaders['Content-type'] = req.get('Content-type');
    proxiedHeaders['rsc-action'] = req.get('rsc-action');
  } else if (req.get('Content-type')) {
    proxiedHeaders['Content-type'] = req.get('Content-type');
  }
  if (req.headers['cache-control']) {
    proxiedHeaders['Cache-Control'] = req.get('cache-control');
  }
  if (req.get('rsc-request-id')) {
    proxiedHeaders['rsc-request-id'] = req.get('rsc-request-id');
  }

  const requestsPrerender = req.path === '/prerender';

  const promiseForData = request(
    {
      host: '127.0.0.1',
      port: 3001,
      method: req.method,
      path: requestsPrerender ? '/?prerender=1' : '/',
      headers: proxiedHeaders,
    },
    req
  );

  if (req.accepts('text/html')) {
    try {
      const rscResponse = await promiseForData;

      let virtualFs;
      let buildPath;
      if (process.env.NODE_ENV === 'development') {
        const {devMiddleware} = res.locals.webpack;
        virtualFs = devMiddleware.outputFileSystem.promises;
        buildPath = devMiddleware.stats.toJson().outputPath;
      } else {
        virtualFs = fs;
        buildPath = path.join(__dirname, '../build/');
      }
      // Read the module map from the virtual file system.
      const serverConsumerManifest = JSON.parse(
        await virtualFs.readFile(
          path.join(buildPath, 'react-ssr-manifest.json'),
          'utf8'
        )
      );

      // Read the entrypoints containing the initial JS to bootstrap everything.